Non-dead space circulating pipeline structure of pure water main machine

Abstract

The utility model discloses a kind of dead spaceless circulation pipeline structures of pure water host, including main pipeline, its one side is equipped with circulation pipe export and circulation pipe import, outlet and import are connected U-shaped circulation pipe by connecting assembly, connecting assembly includes main connector and auxiliary connector, main connector one end connects main pipeline, other end is equipped with external thread joint;Auxiliary connector one end is connected with external thread joint by internal thread, other end is equipped with U-shaped circulation pipe, the sealing block with flow passage hole is fixed in auxiliary connector interior, the one end towards U-shaped circulation pipe of sealing block is equipped with conical lug, when assembling, U-shaped circulation pipe end portion is covered in conical lug, after tightening auxiliary connector, conical lug forces U-shaped circulation pipe end portion radial expansion, so that its outer wall and auxiliary connector inner wall closely adhere, while sealing block end surface and pipeline end surface engage, to thoroughly eliminate the dead space of connecting place. The structure effectively prevents microbial stagnation breeding, guarantees pure water quality and system hygiene safety.

Description

Technical Field

[0001] This utility model relates to the field of dead-cavity circulation pipeline technology, and in particular to a dead-cavity circulation pipeline structure for a pure water main unit. Background Technology

[0002] The quality of pure or ultrapure water is crucial for ensuring the quality of final products, the accuracy of experimental data, and medical safety. To prevent water quality degradation, pure water systems typically feature a circulation pipeline system that continuously circulates pure water to inhibit microbial growth and contaminant accumulation. Therefore, the cleanliness and hygiene level of the circulation pipeline itself, especially the design of the pipeline connection points, directly affects the stability and reliability of the entire pure water system.

[0003] Currently, common connection methods in pure water piping systems include compression fittings, flange connections, heat fusion or socket welding, and sanitary chuck quick-connect fittings. Compression fittings create a seal by tightening the nut, causing the ferrule to cut into the outer wall of the pipe. Flange connections achieve a seal by tightening bolts to compress the gasket between two flanges. Sanitary chuck connections use clamps to hold two flanged joints and a central sealing ring together. The core principle of these traditional connection technologies is to compress independent sealing elements (such as gaskets or sealing rings) or cause localized deformation of the connecting parts, thereby forming one or more sealing barriers between the pipe and the joint to prevent liquid leakage.

[0004] However, the existing connection technologies generally suffer from a structural defect that is difficult to overcome: the unavoidable formation of "dead cavities" or "dead angles" at pipe connections. Specifically, when the pipe end is inserted into the connector, tiny gaps, grooves, or stepped cavities often exist between the pipe end face and the step of the connector's inner wall, or at the interface with the sealing ring, which cannot be fully flushed by the main fluid. The water in these areas is essentially stagnant, providing ideal retention and accumulation sites for pollutants such as bacteria and particles. Over time, the microorganisms in the stagnant water will multiply rapidly and form biofilms. These biofilms will continuously contaminate the flowing pure water, leading to a severe decline in water quality, making it difficult to meet the requirements of high-standard applications, and forcing the system to frequently shut down for cleaning and disinfection, increasing operating costs. Therefore, a dead-cavity-free circulation pipe structure for a pure water main unit is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this invention provides a dead-cavity-free circulation pipeline structure for a pure water main unit, aiming to improve the existing pipeline connection technology that easily forms dead cavities at the joints, leading to water stagnation. This stagnation zone provides conditions for microbial reproduction and biofilm formation, which continuously pollutes the pure water, causing water quality degradation and increased maintenance costs.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a dead-cavity-free circulation pipeline structure for a pure water main unit, including a main pipeline, wherein a circulation pipe outlet and a circulation pipe inlet are provided on one side of the main pipeline, and a connecting component is provided on both the circulation pipe outlet and the circulation pipe inlet side, wherein a U-shaped circulation pipe is connected to the connecting component;

[0007] The connecting assembly includes a main connector and an auxiliary connector. One end of the main connector is sleeved on one end of the circulation pipe outlet or circulation pipe inlet, and the other end of the main connector is fixedly connected to an external threaded connector. One end of the auxiliary connector is provided with an internal thread that mates with the external threaded connector, and the other end of the auxiliary connector is sleeved on one end of the U-shaped circulation pipe.

[0008] A sealing block is fixedly connected to the inner wall of the auxiliary connector. A tapered protrusion is fixedly connected to the end face of the sealing block facing the U-shaped circulation tube. The inner wall of the U-shaped circulation tube is sleeved on the outer wall of the tapered protrusion. The outer wall of the U-shaped circulation tube near the tapered protrusion abuts against the inner wall of the auxiliary connector through the tapered protrusion. A through flow channel hole is provided in the middle of the sealing block and the tapered protrusion.

[0009] As a further description of the above technical solution: the sealing block is disposed on the inner wall of the auxiliary connector near the internal thread.

[0010] As a further description of the above technical solution: the conical bump is composed of a linear array of multiple coaxially arranged conical ring segments with diameters increasing along the insertion direction.

[0011] As a further description of the above technical solution: the auxiliary connector is provided with reinforcing ribs inside.

[0012] As a further description of the above technical solution: an anti-slip protrusion is fixedly connected to the inner wall of the main connector near the outlet of the circulation pipe, and multiple anti-slip protrusions are arranged in a ring array.

[0013] As a further description of the above technical solution: the inner wall of the main connector is provided with a plurality of limiting sealing rings in sequence along its axial direction, and the limiting sealing rings abut against the outer wall of the circulation pipe outlet or circulation pipe inlet.

[0014] As a further description of the above technical solution: along the insertion direction, the inner diameters of the plurality of limiting sealing rings are set in a stepped manner.

[0015] As a further description of the above technical solution: the outer wall of the main connector is fixedly connected with left and right symmetrical connecting blocks.

[0016] This utility model has the following beneficial effects:

[0017] 1. In this utility model, the core of the connecting component lies in the sealing block inside the auxiliary connector and the conical protrusions arranged in a linear array on it. When the end of the U-shaped circulation pipe is fitted onto the conical protrusions, and the auxiliary connector and the external threaded joint are tightened, the conical protrusions generate a radial expansion force on the wall of the U-shaped circulation pipe, forcing its outer wall to fit tightly against the inner wall of the auxiliary connector. This design creates a smooth and seamless transition between the pipe end face and the inner wall of the connector, completely eliminating dead zones such as steps and gaps that are easily generated in traditional connection methods. This prevents the retention of pure water and the growth of microorganisms, greatly ensuring the hygiene and safety level of the circulation pipeline system, and is particularly suitable for pure water units with strict water quality requirements.

[0018] 2. In this utility model, the dual protection structure of anti-slip and sealing inside the main connector significantly enhances the stability and reliability of the pipeline connection. The annular array of anti-slip protrusions on the inner wall of the main connector can tightly lock onto the outer wall of the circulation pipe outlet or inlet of the main pipeline, providing strong mechanical friction and effectively preventing the connection from loosening or falling off due to water flow impact or vibration. At the same time, multiple limiting sealing rings with stepped inner diameters arranged from large to small on its inner side form multiple progressive sealing defenses, which not only ensures the precise positioning of the connection but also achieves excellent leak-proof performance. This composite connection method, which integrates mechanical locking and multi-stage sealing, ensures the long-term stability and sealing reliability of the entire circulation pipeline structure under high pressure or long-term operation conditions, improving the overall safety and durability of the device. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of a dead-cavity circulation pipeline structure for a pure water main unit proposed in this utility model.

[0020] Figure 2 This is a schematic diagram of the auxiliary connector part of a dead-cavity circulation pipeline structure for a pure water main unit proposed in this utility model.

[0021] Figure 3 This is a schematic diagram of the main connector part of a dead-cavity circulation pipeline structure for a pure water main unit proposed in this utility model.

[0022] Figure 4 This is a schematic diagram of the sealing block part of the dead-cavity circulation pipeline structure of a pure water main unit proposed in this utility model.

[0023] Legend:

[0024] 1. Main pipe; 2. Circulation pipe outlet; 3. U-shaped circulation pipe; 4. Auxiliary connector; 5. Internal thread; 6. External thread connector; 7. Main connector; 8. Connecting block; 9. Limiting seal ring; 10. Anti-slip protrusion; 11. Sealing block; 12. Conical protrusion; 13. Reinforcing rib; 14. Circulation pipe inlet. Detailed Implementation

[0025] 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.

[0026] Reference Figures 1-4 The present invention provides an embodiment of a dead-cavity-free circulation pipeline structure for a pure water main unit, including a main pipeline 1. A circulation pipe outlet 2 and a circulation pipe inlet 14, which are symmetrically arranged on one side of the main pipeline 1 for drawing out and returning pure water, are provided on one side of the circulation pipe outlet 2 and the circulation pipe inlet 14. A connecting component for achieving dead-cavity-free connection is provided on one side of the connecting component. A U-shaped circulation pipe 3 that forms a circulation loop is connected to one side of the connecting component.

[0027] The connecting assembly includes a main connector 7 and an auxiliary connector 4, which serve as a connecting base. One end of the main connector 7 is sleeved on one end of the circulation pipe outlet 2, and the other end of the main connector 7 is fixedly connected to an external threaded connector 6 for providing threaded locking. One end of the auxiliary connector 4 is provided with an internal thread 5 that mates with the external threaded connector 6. The other side of the auxiliary connector 4 is sleeved on one end of the U-shaped circulation pipe 3, and the auxiliary connector 4 is provided with a reinforcing rib 13 inside to enhance the structural strength.

[0028] To achieve a dead-cavity-free seal, a sealing block 11, serving as the core sealing element, is fixedly connected to the inner wall of the auxiliary connector 4. The sealing block 11 is located on the inner wall of the auxiliary connector 4 near its internal thread 5. A tapered protrusion 12 for radial expansion of the pipe wall is fixedly connected to the end face of the sealing block 11 facing the U-shaped circulation pipe 3. The tapered protrusion 12 is composed of a linear array of multiple coaxially arranged tapered annular segments with diameters increasing along the insertion direction. In the connected state, the inner wall of the U-shaped circulation pipe 3 is fitted onto the outer wall of the tapered protrusion 12, and the outer wall of the U-shaped circulation pipe 3 near the tapered protrusion 12 abuts against the inner wall of the auxiliary connector 4 through the expansion action of the tapered protrusion 12. A through flow channel hole is provided in the middle of the sealing block 11 and the tapered protrusion 12.

[0029] To enhance the stability of the connection, an anti-slip protrusion 10 is fixedly connected to the inner wall of the main connector 7 near the circulation pipe outlet 2 to increase friction and prevent slippage. Multiple anti-slip protrusions 10 are arranged in a ring array. To ensure sealing, a limiting sealing ring 9 is fixedly connected to the inner wall of the main connector 7 near the anti-slip protrusion 10, which serves as a positioning and multiple sealing function. Multiple limiting sealing rings 9 are arranged sequentially along their axial direction. The outer wall of one limiting sealing ring 9 abuts against one end of the circulation pipe outlet 2, and one side of the outer wall of the anti-slip protrusion 10 abuts against the outer wall of the circulation pipe outlet 2. The multiple limiting sealing rings 9 are arranged with their inner diameter decreasing from large to small, forming a stepped sealing structure. A connecting block 8, which is symmetrical on both sides and easy to tighten, is fixedly connected to the outer wall of the main connector 7.

[0030] Specifically, when the auxiliary connector 4 is tightened, the end of the U-shaped circulation pipe 3 is forced to expand radially under the action of the conical protrusion 12, causing its outer wall to completely fit against the inner wall of the auxiliary connector 4. This creates a smooth transition surface inside the pipe, completely eliminating the sanitary dead corners caused by gaps and steps in traditional joints. Simultaneously, the main connector 7, through the anti-slip protrusions 10 on its inner wall and the multiple stepped limiting sealing rings 9, achieves a firm lock and reliable seal with the circulation pipe outlet 2 of the main pipeline 1. This design not only fundamentally eliminates the conditions for microbial growth, ensuring the quality of pure water, but also ensures the stability and reliability of the pipeline connection during long-term operation, improving the safety and practicality of the entire pure water unit.

[0031] Working principle: When the pipeline is needed, firstly, the main connector 7 is fitted onto the circulation pipe outlet 2 of the main pipeline 1. During this process, multiple anti-slip protrusions 10 on the inner wall of the main connector 7 will tightly abut against the outer wall of the circulation pipe outlet 2, providing a firm radial clamping force. At the same time, multiple step-shaped limiting sealing rings 9 will form multiple seals with the end face and outer wall of the circulation pipe outlet 2, ensuring the initial fixation and sealing of the connection.

[0032] Subsequently, one end of the U-shaped circulation pipe 3 is inserted into the auxiliary connector 4, so that its inner wall fits onto the multiple tapered protrusions 12 on the surface of the sealing block 11. Next, the auxiliary connector 4 is tightened onto the external threaded connector 6 at the end of the main connector 7 via its internal thread 5. During the tightening process, the auxiliary connector 4 moves towards the main connector 7, thereby pushing the end of the U-shaped circulation pipe 3 to continuously extend into the tapered protrusions 12. Due to the tapered design of the tapered protrusions 12, the end wall of the U-shaped circulation pipe 3 is uniformly expanded radially outward, and finally its outer wall is forcibly and tightly pressed against and adhered to the inner wall of the auxiliary connector 4. This process eliminates all gaps and steps that may form dead water at the pipe connection, forming a smooth internal transition without dead space. Connecting the other end of the U-shaped circulation pipe 3 to the circulation pipe inlet 14 of the main pipeline 1 in the same manner constitutes a complete, reliable, and sanitary dead-angle-free circulation pipeline structure.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dead space free circulation pipeline structure of a pure water main machine, comprising a main pipeline (1), characterized in that, The main pipeline (1) is provided with a symmetrical circulation pipe outlet (2) and circulation pipe inlet (14) on one side. A connecting component is provided on one side of the circulation pipe outlet (2) and circulation pipe inlet (14), and the connecting component is connected to a U-shaped circulation pipe (3). The connecting assembly includes a main connector (7) and an auxiliary connector (4). One end of the main connector (7) is sleeved on one end of the circulation pipe outlet (2) or the circulation pipe inlet (14), and the other end of the main connector (7) is fixedly connected to an external threaded connector (6). One end of the auxiliary connector (4) is provided with an internal thread (5) that mates with the external threaded connector (6), and the other end of the auxiliary connector (4) is sleeved on one end of the U-shaped circulation pipe (3). A sealing block (11) is fixedly connected to the inner wall of the auxiliary connector (4). A conical protrusion (12) is fixedly connected to the end face of the sealing block (11) facing the U-shaped circulation pipe (3). The inner wall of the U-shaped circulation pipe (3) is sleeved on the outer wall of the conical protrusion (12). The outer wall of the U-shaped circulation pipe (3) near the conical protrusion (12) abuts against the inner wall of the auxiliary connector (4) through the conical protrusion (12). A through flow channel hole is provided in the middle of the sealing block (11) and the conical protrusion (12).

2. The non-dead volume circulation line structure of a pure water generator according to claim 1, characterized in that: The sealing block (11) is located on the inner wall of the auxiliary connector (4) near the internal thread (5).

3. The non-dead volume circulation line structure of a pure water generator according to claim 1, characterized in that: The conical bump (12) is composed of a linear array of multiple coaxially arranged conical ring segments with increasing diameter along the insertion direction.

4. The non-dead volume circulation line structure of a pure water generator according to claim 1, characterized in that: The auxiliary connector (4) is provided with a reinforcing rib (13).

5. The non-dead volume circulation line structure of a pure water generator according to claim 1, characterized in that: The inner wall of the main connector (7) near the outlet (2) of the circulation pipe is fixedly connected to an anti-slip protrusion (10), and the anti-slip protrusion (10) is arranged in a ring array with multiple protrusions.

6. The non-dead volume circulation line structure of a pure water generator according to claim 1, characterized in that: The inner wall of the main connector (7) is provided with a plurality of limiting seal rings (9) in sequence along its axial direction. The limiting seal rings (9) abut against the outer wall of the circulation pipe outlet (2) or circulation pipe inlet (14).

7. The dead-cavity-free circulation pipeline structure of a pure water main unit according to claim 6, characterized in that: Along the insertion direction, the inner diameters of the plurality of limiting sealing rings (9) are set in a stepped manner.

8. The dead-cavity-free circulation pipeline structure of a pure water main unit according to claim 1, characterized in that: The outer wall of the main connector (7) is fixedly connected with symmetrical connecting blocks (8).

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