Pipeline connecting structure of anti-corrosion soy sauce pasteurizer

Abstract

The utility model relates to the field of sterilization, especially a pipeline connecting structure of anti-corrosion soy sauce pasteurization machine. The utility model is applied to the sterilization device, spiral pipeline is arranged in the sterilization device, spiral axis of spiral pipeline is vertical setting, the top of spiral pipeline is connected with feed pipe, the bottom of spiral pipeline is connected with discharge pipe, the inner diameter of spiral pipeline changes uniformly, and the inner diameter of pipeline entry end of spiral pipeline is greater than the inner diameter of outlet end. The utility model discloses through the cooperation of spiral pipeline and the design of gradually reducing inner diameter, forms the laminar state of uniform acceleration along the way, avoids the scouring corrosion caused by turbulent impact of the inlet section, prevents the deposition corrosion of low speed area through the flow velocity gradient control. The secondary flow effect produced by spiral flow channel makes fluid continuously scour the pipe wall, eliminates the deposition dead angle of traditional pipeline with the cooperation of flow guide vane, and significantly reduces the risk of pitting.

Description

Technical Field

[0001] This utility model relates to the field of sterilization, and in particular to a pipe connection structure for a corrosion-resistant soy sauce pasteurization machine. Background Technology

[0002] In soy sauce production, tubular sterilizers are crucial sterilization equipment, with their core pipelines continuously transporting the complex components of soy sauce. Soy sauce contains high concentrations of sodium chloride and various organic acids, which, under high-temperature sterilization and continuous flow conditions, cause extremely strong chemical and electrochemical corrosion to the metal pipelines, particularly erosion corrosion and localized pitting corrosion. This makes the pipelines, especially welds, elbows, and diameter changes, highly susceptible to corrosion and perforation, leading to equipment damage, soy sauce leaks and pollution, frequent downtime for maintenance, and seriously affecting production safety, efficiency, and costs. Current technologies mainly rely on high-corrosion-resistant alloys or linings / coatings for protection; however, the former is expensive and still corrodes under extreme conditions, while the latter suffers from problems such as cracking and peeling of the lining / coating due to thermal expansion and contraction, and difficulties in maintenance, resulting in insufficient reliability.

[0003] Current solutions focus on material upgrades or surface protection, which, while effective to some extent, are costly, have limited lifespans, and are complex to maintain. Therefore, there is an urgent need for a new type of pipeline structure that is cost-effective and highly reliable. This new structure should optimize the geometry and internal flow channel design to improve fluid distribution, reduce erosion, and eliminate dead zones. This would significantly enhance the corrosion resistance of the pipeline under the harsh conditions of high-temperature sterilization in soy sauce production, compensating for the shortcomings of existing protection technologies or synergistically enhancing their effectiveness. Utility Model Content

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: This utility model discloses a pipe connection structure for a corrosion-resistant soy sauce pasteurization machine, which is applied to a sterilization device. The sterilization device is equipped with a spiral pipe with a vertically arranged spiral axis. The top of the spiral pipe is connected to a feed pipe, and the bottom of the spiral pipe is connected to a discharge pipe. The inner diameter of the spiral pipe varies uniformly, and the inner diameter of the inlet end of the spiral pipe is larger than the inner diameter of the outlet end.

[0005] Furthermore, the feed pipe is provided with a gradually expanding horn-shaped inlet section, the larger end of which faces the incoming flow direction of the feed pipe, and the smaller end which smoothly transitions to the inlet end of the spiral pipe.

[0006] Furthermore, a guide vane is provided on the inner wall of the upper half of the spiral pipe. The guide vane is located on the inner wall of the spiral pipe in the spiral bending direction and is used to guide the fluid to cover the pipe wall to prevent deposition.

[0007] Furthermore, the inlet and outlet ends of the spiral pipe are connected to the feed pipe and discharge pipe respectively via transition flanges; the inner bore of the transition flange has a curved surface that matches the spiral pipe.

[0008] Furthermore, the inner wall surface of the spiral pipe is also covered with an anti-corrosion coating.

[0009] The beneficial effects of this utility model are as follows: By using a spiral pipe with a gradually decreasing inner diameter design, a laminar flow state with uniform acceleration along the pipe is formed. This avoids scouring corrosion caused by turbulent impact at the inlet section, and prevents deposition corrosion in low-velocity zones through flow velocity gradient control. The secondary flow effect generated by the spiral flow channel allows the fluid to continuously scour the pipe wall, and with the help of guide vanes, it eliminates the deposition dead zones of traditional pipes, significantly reducing the risk of pitting corrosion.

[0010] The spiral flow channel reduces the frequency of direct fluid scouring, and the anti-corrosion coating undertakes the main corrosion resistance function; the guide vanes force the fluid to sweep across the pipe wall to prevent local peeling of the coating; the flange sealing surface adopts a bimetallic nested structure to avoid penetration corrosion caused by coating edge effect. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the spiral pipe structure of this utility model; Figure 3 for Figure 2 A schematic diagram of the partial structure at point A in the middle.

[0012] Explanation of reference numerals in the attached drawings: 1-Sterilization device; 2-Spiral pipe; 21-Guide plate; 3-Inlet pipe; 31-Flute-shaped inlet section; 4-Outlet pipe; 5-Transition flange. Detailed Implementation

[0013] The present invention will be further described in detail below with reference to the accompanying drawings.

[0014] This utility model discloses a pipe connection structure for a corrosion-resistant soy sauce pasteurization machine, applied to a sterilization device 1. The sterilization device 1 includes a spiral pipe 2 with a vertically aligned spiral axis. The top of the spiral pipe 2 is connected to an inlet pipe 3, and the bottom is connected to an outlet pipe 4. The inner diameter of the spiral pipe 2 varies uniformly, with the inlet diameter being larger than the outlet diameter. The tapered spiral pipe 2 utilizes the Venturi effect to uniformly accelerate the fluid along its path, creating a low-pressure zone at the inlet section to reduce turbulence intensity, while increasing the flow velocity at the outlet section enhances the scouring effect.

[0015] The feed pipe 3 is provided with a gradually expanding horn-shaped inlet section 31. The larger end of the horn-shaped inlet section 31 faces the incoming flow direction of the feed pipe 3, and the smaller end smoothly transitions to the inlet end of the spiral pipe 2. The horn-shaped inlet section 31 smoothly transitions the straight flow to spiral flow through streamlined expansion, avoiding separation flow caused by sudden fluid turning. At the same time, the large radius of curvature effectively reduces the inlet impact pressure and prevents coating peeling caused by local stress concentration.

[0016] A guide vane 21 is provided on the inner wall of the upper half of the spiral pipe 2. The guide vane 21 is located on the inner wall of the spiral pipe 2 on the inner side in the spiral bending direction. The guide vane 21 forcibly changes the motion trajectory of the fluid micro-particles, so that the low-speed fluid near the pipe wall obtains tangential acceleration, forming a wall-attached jet on the inner side of the spiral. This effectively covers the low-speed backflow zone that is prone to occur in traditional spiral pipes 2, and prevents soy sauce components from depositing under the action of gravity.

[0017] The inlet and outlet ends of the spiral pipe 2 are connected to the feed pipe 3 and discharge pipe 4 respectively via transition flanges 5. The inner bore of the transition flange 5 has a curved surface that matches the spiral pipe 2. By matching the radius of curvature of the spiral pipe 2, the transition flange 5 ensures that the weld heat-affected zone avoids the high shear stress region. Simultaneously, the curved sealing surface increases the contact area compared to a traditional flat flange, significantly reducing the risk of leakage at the connection point. The inner wall surface of the spiral pipe 2 is also covered with an anti-corrosion coating. This anti-corrosion coating, acting as an electrochemical protective barrier, is preferably made of polytetrafluoroethylene (PTFE) material, which has high hydrophobicity. Combined with the periodic pressure fluctuations generated by the spiral flow channel, this creates a dynamic self-cleaning effect on the coating surface, preventing corrosive media from penetrating through the micropores of the coating.

[0018] Through the above specific embodiments, those skilled in the art can easily implement this utility model. However, it should be understood that this utility model is not limited to the specific embodiments described above. Based on the disclosed embodiments, those skilled in the art can arbitrarily combine different technical features to achieve different technical solutions.

Claims

1. A pipe connection structure for a corrosion-resistant soy sauce pasteurization machine, applied to a sterilization device (1), characterized in that: The sterilization device (1) is equipped with a spiral pipe (2), the spiral axis of the spiral pipe (2) is vertically arranged, the top of the spiral pipe (2) is connected to the feed pipe (3), and the bottom of the spiral pipe is connected to the discharge pipe (4); the inner diameter of the spiral pipe (2) varies uniformly, and the inner diameter of the inlet end of the spiral pipe (2) is larger than the inner diameter of the outlet end.

2. The pipe connection structure of the anti-corrosion soy sauce pasteurization machine according to claim 1, characterized in that: The feed pipe (3) is provided with a gradually expanding horn-shaped inlet section (31), the large end of which faces the flow direction of the feed pipe (3), and the small end is smoothly connected to the inlet end of the spiral pipe (2).

3. The pipe connection structure of the anti-corrosion soy sauce pasteurization machine according to claim 1, characterized in that: A guide vane (21) is provided on the inner wall of the upper half of the spiral pipe (2). The guide vane (21) is located on the inner wall of the spiral pipe (2) in the spiral bending direction.

4. The pipe connection structure of a corrosion-resistant soy sauce pasteurizer according to any one of claims 1 to 3, characterized in that: The inlet and outlet ends of the spiral pipe (2) are connected to the feed pipe (3) and the discharge pipe (4) respectively through the transition flange (5); the inner hole of the transition flange (5) has a curved surface that matches the spiral pipe (2).

5. The pipe connection structure of a corrosion-resistant soy sauce pasteurizer according to claim 2, characterized in that: The inner wall surface of the spiral pipe (2) is also covered with an anti-corrosion coating.

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