Sleeve type anti-condensation device for wax raw materials
By optimizing the structural design of the wax raw material conveying device, adopting concentric main and auxiliary pipelines, bypass channels, and improvements at bends, the problems of obstructed steam flow and low heat transfer efficiency were solved, thereby improving the anti-condensation effect and system stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-18
- Publication Date
- 2026-04-21
AI Technical Summary
The existing wax raw material transportation process suffers from problems such as obstructed steam flow, low heat transfer efficiency, and easy blockage at bends, which affect the anti-condensation effect and system stability.
A nested anti-condensation device was designed, which adopts a concentric arrangement of main and auxiliary pipes, with steam flowing in the gap, flanges arranged at intervals and connected by bolts, a bypass channel design for the bypass pipe, optimized structure at bends, and the addition of through holes or semi-circular inner edges to ensure smooth steam flow and uniform heating.
It improves the smoothness of steam flow and heat transfer efficiency, reduces pressure loss, enhances the sealing and mechanical strength of bends, and extends the service life of the equipment.
Smart Images
Figure CN224150431U_ABST
Abstract
Description
Technical Field
[0001] This application relates to an anti-condensation device in the process of transporting wax raw materials, and more particularly to a sleeve-type anti-condensation device that prevents liquid wax from solidifying in the transport pipeline by means of steam heating or heat preservation. Background Technology
[0002] During the production and transportation of wax raw materials, liquid wax is prone to solidification at low temperatures, leading to pipeline blockage and affecting production efficiency. In existing technologies, steam or electric heating is usually used to insulate the transportation pipeline to prevent the wax raw materials from solidifying. However, existing anti-solidification devices have the following problems and disadvantages.
[0003] 1. Problem of obstructed steam flow: Traditional nested anti-condensation devices usually adopt a double-layer pipe structure, with steam flowing in the gap between the outer and inner pipes to heat the inner pipe; however, due to the presence of the support structure (such as flange), the steam flow path will be obstructed, resulting in a local reduction in steam velocity, affecting the uniformity of heating, and may even cause uneven heat distribution due to steam stagnation, thus affecting the anti-condensation effect.
[0004] 2. The supporting structure affects the heat transfer efficiency: In the existing technology, the supporting structure such as the flange is usually in direct contact with the outer wall of the inner pipe, which causes the steam flow channel to be partially blocked. The steam needs to detour or slow down to pass through, which reduces the heat transfer efficiency and may increase the steam pressure loss, affecting the stability of system operation.
[0005] 3. Complex structure at bends: At pipe bends, traditional anti-condensation devices often struggle to maintain the concentric arrangement of internal and external pipes, leading to poor steam flow and even localized condensation, which affects the overall anti-condensation effect. In addition, the connection method at bends (such as welding or flange connection) may result in steam leakage or insufficient strength due to unreasonable structure.
[0006] 4. Inappropriate bypass structure design: Some existing technologies use bypass pipes (such as bypass tubes) to bypass the support structure. However, if the diameter and arrangement of the bypass pipes are not reasonable, it may cause the steam flow rate to be too fast, impacting the pipes, causing loosening or vibration, and affecting the service life of the equipment. Utility Model Content
[0007] The problem this application aims to solve is the obstruction of steam flow, low heat transfer efficiency, and easy blockage at bends in the prior art.
[0008] To address the aforementioned technical problems, this application provides a sleeve-type anti-condensation device for wax raw materials, comprising a main pipe for conveying liquid wax; a secondary pipe sleeved outside the main pipe, wherein the main pipe and the secondary pipe are arranged concentrically with a gap between them for steam flow to heat or insulate the main pipe; multiple flanges, spaced apart along the layout direction of the secondary pipe and connected to each other by bolts to form a continuous support structure; each flange having an inwardly extending flange that abuts against the outer wall of the main pipe to support the secondary pipe; and side pipes arranged side by side at each flange, the two ends of which are connected to the secondary pipes on both sides of the flange to form a steam bypass channel for allowing steam to bypass the obstruction of the flange.
[0009] Since the anti-condensation device of this application is designed with a main pipe, a secondary pipe, a flange, and a bypass pipe, by optimizing the support structure of the secondary pipe, adding a bypass channel for the bypass pipe, rationally designing the size of the bypass pipe, and optimizing the structure at the bend, the problems of obstructed steam flow, low heat transfer efficiency, and easy blockage at the bend in the prior art are effectively solved, thereby improving the stability and reliability of the anti-condensation device.
[0010] The technical effects of this technical solution are as follows:
[0011] 1. Smoother steam flow and more uniform heating: The bypass pipe design avoids direct obstruction of steam by the flange, allowing steam to be evenly distributed and improving heat transfer efficiency.
[0012] 2. Reduce pressure loss and improve system stability: The optimized bypass pipe size and layout reduce steam flow resistance, reduce kinetic energy loss, and ensure that steam is efficiently delivered to all parts of the pipeline.
[0013] 3. More reliable structure at bends: The symmetrical welding process enhances the sealing and mechanical strength of the bends, preventing steam leakage or pipe deformation.
[0014] 4. Extend the service life of the equipment: The reasonable design of the bypass pipe size avoids vibration or loosening caused by high-speed steam impact, thus improving the durability of the equipment. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall structure of Example 1.
[0016] Figure 2 This is a cross-sectional structural diagram of Example 1.
[0017] Figure 3 This is a cross-sectional structural diagram of Example 2.
[0018] Figure 4 This is a cross-sectional structural diagram of Example 3.
[0019] In the diagram: 1. Main pipe; 2. Secondary pipe; 3. Flange; 4. Bolt; 5. Flange; 6. Bypass pipe; 7. Through hole; 8. Semi-circular arc structure. Detailed Implementation
[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Example 1
[0021] This embodiment provides a sleeve-type anti-condensation device for wax raw materials. This device is mainly used to prevent the liquid wax in the main pipeline from solidifying during the liquid wax transportation process by using steam heating or heat preservation, thus ensuring the smoothness of the transportation process. Figure 1-2 As shown, the anti-condensation device mainly includes a main pipe 1 for conveying liquid wax and a secondary pipe 2 fitted outside the main pipe 1. The main pipe 1 and the secondary pipe 2 are arranged concentrically, forming a certain gap between them. Steam flows within this gap to heat or insulate the main pipe 1. To ensure that the secondary pipe 2 can be stably fitted outside the main pipe 1, multiple flanges 3 are arranged at intervals along its layout direction on the upper part of the secondary pipe 2. These flanges 3 are connected to each other by bolts 4 to form a continuous support structure. Each flange 3 has an inward... The extended flange 5 abuts against the outer wall of the main pipe 1, thus providing stable support for the secondary pipe 2. Due to the setting of the flange 5, the steam will be somewhat obstructed when flowing in the gap between the main pipe 1 and the secondary pipe 2. To solve this problem, a bypass pipe 6 is added at each flange 3, with both ends of the bypass pipe 6 connected to the secondary pipes 2 on both sides of the flange 3, forming a steam bypass channel. When the steam moves to the flange 3, it can bypass the obstruction of the flange 3 with the help of the bypass pipe 6 and continue to flow smoothly.
[0022] To avoid the bypass pipe 6 from loosening due to excessive steam flow, the diameter ratio of the bypass pipe 6 to the auxiliary pipe 2 is designed to be 1:6-8. Simultaneously, the minimum diameter of the bypass pipe 6 is not less than 25mm to ensure sufficient strength and flow capacity. At pipe bends, since the auxiliary pipe 2 cannot be directly fitted onto the main pipe 1, a symmetrical splicing structure is adopted at the bends. Specifically, the auxiliary pipe 2 is cut into two parts at the bend, and then these two parts are reconnected by welding to form a complete bend structure. During welding, the quality of the weld must be ensured to prevent steam leakage or insufficient pipe strength. Through the above design, the sleeve-type anti-condensation device for wax raw materials in this embodiment can effectively prevent the liquid wax in the main pipe 1 from solidifying, while ensuring smooth steam flow in the gap between the main pipe 1 and the auxiliary pipe 2, thus improving the stability and reliability of the entire conveying system. Example 2
[0023] Based on Example 1, this example optimizes and improves the anti-condensation device to address the issues of reduced steam flow and kinetic energy loss caused by the large diameter difference between the bypass pipe and the auxiliary pipe and their non-concentric arrangement. Figure 3 As shown, the specific structure and usage are as follows.
[0024] Because the diameter of the bypass pipe and the secondary pipe varies significantly and they are not concentrically arranged, steam experiences reduced flow and energy loss during passage. In severe cases, steam de-thermia can absorb heat from the liquid wax in the main pipe, causing the liquid wax to solidify. To address this issue, this embodiment eliminates the bypass pipe structure and instead optimizes the structure on the upper part of the flange flange. Specifically, multiple through holes 7 are evenly spaced along the circumferential direction on the upper part of the flange flange 5 of each flange 3. These through holes 7 penetrate the flange flange 5, allowing steam to flow smoothly inside the secondary pipe 2 without being affected by the flow restriction and energy loss caused by the bypass pipe structure. Furthermore, by adjusting the number of through holes 7, the steam flow can be easily controlled. Compared to the bypass structure, it is easier to increase or decrease the number of through holes, which can better adapt to different working conditions. In the optimized anti-condensation device, steam enters the gap between the secondary pipe 2 and the main pipe 1 from the steam supply end. When the steam flows to the flange 3, the through holes 7 are opened on the flange 5, and the steam can quickly pass through the flange 3 through these through holes 7 and continue to flow in the gap between the secondary pipe 2 and the main pipe 1. This design avoids the reduction in steam flow and kinetic energy loss caused by structural obstruction at the flange 3, and ensures that the steam can reach all parts of the main pipe 1 with a high flow rate and low kinetic energy loss, thereby effectively heating or insulating the main pipe 1.
[0025] Usage: Install the main pipe 1 and the auxiliary pipe 2 according to the installation method of the main pipe and auxiliary pipe in Example 1, and install the flange 3 with the through hole 7. Securely connect the adjacent flanges 3 with bolts 4. After installation, perform system debugging on the entire anti-condensation device. Introduce steam into the gap between the auxiliary pipe 2 and the main pipe 1 to check whether the steam can flow smoothly through the through hole 7. At the same time, monitor the temperature change of the main pipe 1 to ensure that the heating or insulation effect meets the requirements. During the liquid wax transportation process, continuously supply steam into the gap between the auxiliary pipe 2 and the main pipe 1. Adjust the steam flow rate and temperature according to actual needs to ensure the main pipe... The liquid wax in pipe 1 is within a suitable temperature range. Due to the elimination of the bypass pipe structure and the adoption of a through-hole design, the steam flow is smoother, which can more effectively maintain the temperature of the main pipe 1. During operation, the temperature of the main pipe 1 also needs to be monitored in real time to ensure that the liquid wax does not solidify due to excessively low temperature. The anti-condensation device should be inspected and maintained regularly, with a focus on checking the unobstructed flow of through-hole 7 on flange 3 to prevent impurities from clogging the steam flow. At the same time, the connection of flange 3 and the integrity of secondary pipe 2 should be checked. If through-hole 7 is found to be blocked or other abnormalities are found, it should be cleaned or repaired in time to ensure the normal operation of the device.
[0026] Through the improvements in this embodiment, the bypass pipe structure is eliminated and a through hole is opened on the upper part of the flange flange, which effectively increases the steam flow rate, reduces the kinetic energy loss of the steam, and avoids the problem of severe steam temperature loss and heat absorption of liquid wax. This device can heat or keep the liquid wax in the main pipeline more stably and efficiently, ensuring the smooth progress of the liquid wax transportation process and improving the reliability and safety of the entire transportation system. Example 3
[0027] This embodiment, based on Embodiment 2, improves upon steam flow resistance optimization and flow cross-section enhancement, aiming to further improve the heating efficiency and operational stability of the anti-condensation device. Figure 4As shown, to reduce the flow resistance of steam when passing through the flange area, this embodiment designs the inner edge of flange 3 as a semi-circular arc structure 8. Compared with the convex inner edge of the planar structure in embodiment 2, the semi-circular arc inner edge can reduce the boundary layer disturbance experienced by steam during flow, reduce energy loss caused by friction between fluid and solid surface, and guide steam to smoothly transition along the arc surface, avoiding eddies and pressure loss caused by right-angle structures. The semi-circular arc structures 8 of the inner edges of every two adjacent flanges 3 are respectively arranged on both sides of the main pipeline 1, forming a "staggered interlocking" clamping and fixing method (Flange 3). Flange A's inner edge is fitted to the lower left of the main pipe, and flange B's inner edge is fitted to the upper right of the main pipe. This design achieves stable fixation through two-point symmetrical clamping. At the same time, by utilizing the staggered distribution of the inner edges of adjacent flanges, a continuous and unobstructed steam flow channel is formed in the annular gap between the main pipe and the auxiliary pipe. Compared with the through-hole array in Embodiment 2, the flow cross section in this embodiment is upgraded from a discrete hole shape to an annular strip shape, increasing the flow area by about 3-5 times (depending on the difference in pipe diameter between the main pipe and the auxiliary pipe). The steam flow rate through the flange area can be increased by 40%-60%, and the pressure loss is reduced by more than 70%.
[0028] The radius R of the inner edge 8 of the semicircular arc needs to be determined based on the outer diameter D1 of the main pipe 1 and the inner diameter D2 of the secondary pipe 2. The relationship is as follows: For example, when the outer diameter of the main pipe D1 = 150 mm and the inner diameter of the secondary pipe D2 = 200 mm, the radius of curvature R should be controlled within the range of 11.25-13.75 mm to ensure that the curved surface fits tightly against the outer wall of the main pipe, while avoiding steam flow separation due to excessive curvature.
[0029] The axial spacing L between adjacent flanges 3 needs to take into account both the steam velocity v and the heat transfer efficiency. The recommended value is: For example, under the aforementioned pipe diameter conditions, it is recommended that the axial spacing L be 150-250mm. This can ensure the support strength of the flange for the secondary pipe and avoid steam flow field disturbance caused by too small a spacing.
[0030] Instructions for use: After hoisting the main pipe 1 to the predetermined position, sequentially insert the secondary pipes 2 along the axial direction of the main pipe. Install one flange 3 at every designed interval L. During installation, ensure that the semi-circular arc structure 8 along the inner edge of adjacent flanges is symmetrically distributed on both sides of the main pipe. Adjust the flange angle using a laser calibrator to ensure that the gap between the inner edge of the arc and the outer wall of the main pipe is ≤0.5mm. Tighten the flanges with high-strength bolts 4, with the torque value conforming to the "Technical Specification for Pipeline Flange Connection" (GB / T). 9125) is executed, and a 5% preload redundancy is applied to compensate for thermal expansion. During the commissioning phase, low-pressure steam (0.2-0.3 MPa) is introduced into the auxiliary pipe 2. A thermal imager is used to detect the surface temperature distribution of the main pipe. If the temperature difference in a certain area is >5℃, the fit of the arc-shaped inner edge is corrected by adding or removing gaskets or finely adjusting the flange angle. During the steam supply phase, the pressure difference ΔP between the upstream and downstream of the flange area is monitored by a pressure sensor. When ΔP > 0.05 MPa, it is necessary to check whether there is scale buildup or misalignment on the arc-shaped inner edge. During the liquid wax transportation process, a distributed fiber optic temperature measurement system is used. The system monitors the axial temperature gradient of the main pipeline in real time. If the temperature drop rate of a certain section is greater than 0.5℃ / min, the steam temperature or flow rate is immediately increased to ensure that the wax temperature is always more than 5℃ above the freezing point. After every 2000 hours of operation, the flange is disassembled to check the wear of the arc-shaped inner edge. If grooves or corrosion with a depth greater than 0.2mm are found, the arc-shaped surface needs to be re-machined using a CNC machine tool. For impurities carried in the steam, a magnetic filter is installed at the steam inlet and the filter screen is cleaned every 500 hours to prevent particles from getting stuck in the gap between the arc-shaped inner edge and the main pipeline.
Claims
1. A sleeve-type anti-condensation device for wax raw materials, characterized in that: include Main pipeline used for transporting liquid wax; A secondary pipe is fitted outside the main pipe. The main pipe and the secondary pipe are arranged concentrically, with a gap between them, for the purpose of allowing steam to flow to heat or insulate the main pipe. Multiple flanges are arranged at intervals along the direction of the secondary pipeline and are connected to each other by bolts to form a continuous support structure. Each flange has an inwardly extending flange that abuts against the outer wall of the main pipe to support the secondary pipe; Each flange has a bypass pipe arranged in parallel, and the two ends of the bypass pipe are respectively connected to the auxiliary pipes on both sides of the flange to form a steam bypass channel, which is used to allow steam to bypass the obstruction of the flange.
2. The set type anti-condensation device for a wax raw material according to claim 1, characterized by: The ratio of the diameter of the bypass pipe to the diameter of the secondary pipe is 1:6-8.
3. The set type anti-condensation device for a wax raw material according to claim 2, characterized by: The minimum diameter of the bypass tube is not less than 25 mm.
4. The set type anti-condensation device for a wax raw material according to claim 1, characterized by: The bends in the secondary pipes employ a symmetrical splicing structure, where the two cut parts are reconnected by welding to form a complete bend structure.
5. The set type anti-condensation device for a wax raw material according to claim 1, characterized by: The bypass pipe is removed, and multiple through holes are evenly and spaced along the circumferential direction on the upper part of the flange of each flange for steam to pass through.
6. The set type anti-condensation device for a wax raw material according to claim 5, characterized by: The number of through holes is adjustable to adapt to different working conditions.
7. The set type anti-condensation device for a wax raw material according to claim 1, characterized by: The inner edge of the flange is designed with a semi-circular arc structure to reduce steam flow resistance.
8. The set type anti-condensation device for a wax raw material according to claim 7, characterized by: The inner semi-circular arc structures of two adjacent flanges are arranged on both sides of the main pipeline to form an interlocking clamping and fixing method.
9. The set type anti-condensation device for a wax raw material according to claim 7, characterized by: The radius R of the semi-circular arc structure satisfies the following relationship: Where D1 is the outer diameter of the main pipe and D2 is the inner diameter of the secondary pipe.
10. The set type anti-condensation device for a wax raw material according to claim 8, characterized by: The axial distance L between adjacent flanges satisfies the following relationship: Wherein, D1 is the outer diameter of the main pipe, and D2 is the outer diameter of the secondary pipe.