Vertical cooling tube for internal reflux sand cooling

Abstract

The utility model discloses a kind of internal backflow sand cooling vertical cooling pipe, including small pipe, small pipe support, big pipe, centering sleeve and big pipe support sleeve, the small pipe is set inside big pipe along axial direction, the both ends of the small pipe are open structure, the lower end of the big pipe is equipped with sealing plate closure, upper end is open structure, the lower end outlet of the small pipe is aligned with the lower end closed end of the big pipe, multiple the centering sleeve is arranged in small pipe outside, the inside of the centering sleeve is attached with small pipe outer wall, outside is attached with big pipe inner wall, the small pipe support is fixedly connected in big pipe inside, the big pipe support sleeve is cylindrical structure, is sleeved in the upper end outer wall of big pipe, and is fixedly connected. Therefore, overcome the problem that traditional plate type cooling device structure is complex, heat exchange efficiency is low, sand is easy to accumulate, realize the technical effect that cooling efficiency is high, flow is smooth, running is stable.

Description

Technical Field

[0001] This utility model relates to the field of sand cooling technology, and in particular to a vertical cooling pipe for internal reflux sand cooling. Background Technology

[0002] Currently, sand cooling pipes are key components in sand and gravel aggregate pre-cooling systems. Their main function is to cool high-temperature sand and gravel aggregates using cooling fluid, thereby improving the efficiency and stability of the overall cooling system. In existing technologies, thermally conductive sand cooling equipment often employs a plate structure, consisting of two steel plates welded and sealed along their four sides to form a hollow cavity, creating a fluid channel. The cooling medium flows unidirectionally within this channel, while the sand and gravel aggregates fall from the outside of the plates by gravity, contacting the plate walls for heat exchange, thus achieving indirect cooling.

[0003] However, the aforementioned plate structure has several shortcomings in practical use. On the one hand, the plate channel structure is complex, the manufacturing process is cumbersome, and modular replacement or maintenance is not easy to achieve. On the other hand, because sand and scale easily accumulate on the plate surface, the aggregate cannot slide smoothly, which can easily clog the cooling device and affect the heat exchange effect. In addition, the unidirectional flow structure restricts the flow path of the fluid inside the cooling pipe, resulting in low fluid utilization efficiency and limiting the overall heat exchange capacity. Utility Model Content

[0004] This utility model aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, the purpose of this utility model is to propose a vertical cooling pipe for internal reflux sand cooling. By setting a centering sleeve and supporting components between the small and large pipes, structural stability is ensured and fluid can flow back and forth, thereby improving heat exchange efficiency. The smooth outer wall design of the large pipe avoids the problems of sand adhesion and blockage, thus solving the problems of complex processing, easy sand accumulation, and low heat exchange efficiency of traditional plate structures.

[0006] To achieve the above objectives, this utility model proposes a vertical cooling pipe for internal reflux sand cooling, comprising a small pipe, a small pipe support, a large pipe, a centering sleeve, and a large pipe support sleeve. The small pipe is axially arranged inside the large pipe, and both its upper and lower ends are open structures. The large pipe has a sealing plate at its lower end and an open structure at its upper end. The lower outlet of the small pipe is aligned with the lower closed end of the large pipe. Multiple centering sleeves are arranged outside the small pipe, with the inner side of the centering sleeve fitting against the outer wall of the small pipe and the outer side fitting against the inner wall of the large pipe. The small pipe support is fixedly connected inside the large pipe. The large pipe support sleeve is a cylindrical structure, fitted onto the upper outer wall of the large pipe, and fixedly connected.

[0007] This utility model features a vertical cooling pipe for internal reflux sand cooling. The fluid is introduced into the closed cavity at the lower end of the large pipe from the outlet of the small pipe, then flows back out along the large pipe, forming a "U-shaped" reflux path. This significantly extends the fluid's residence time and heat transfer path, improving cooling efficiency. The inner side of the centering sleeve fits against the outer wall of the small pipe, while the outer side fits against the inner wall of the large pipe, ensuring the small pipe remains coaxially positioned during operation, preventing displacement or shaking, and enhancing structural stability and seismic resistance. The large pipe has a straight, smooth structure, allowing sand and gravel aggregate to slide naturally off its outer surface, reducing adhesion and blockage. A large pipe support sleeve is installed at the upper end of the large pipe, with an inner diameter slightly larger than the outer diameter, and an annular flange at the bottom for positioning and preventing slippage. The overall structure is rationally designed and easy to install, overcoming the problems of complex structure, low heat exchange efficiency, and easy sand accumulation in traditional plate cooling devices. It achieves high cooling efficiency, smooth flow, and stable operation.

[0008] In addition, the vertical cooling pipe for internal reflux sand cooling proposed in this utility model may also have the following additional technical features:

[0009] Specifically, the small tube is vertically arranged inside the large tube and is coaxial with the large tube.

[0010] Specifically, there are multiple centering sleeves, which are evenly distributed along the axial direction of the tube.

[0011] Specifically, the large tube has a straight tubular structure with a smooth outer wall.

[0012] Specifically, the inner diameter of the large tube support sleeve is larger than the outer diameter of the large tube, and an annular flange is provided at its bottom.

[0013] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0014] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which:

[0015] Figure 1 This is a schematic diagram of the vertical cooling pipe for internal reflux sand cooling of this utility model.

[0016] As shown in the figure:

[0017] 1. Small tube; 2. Small tube support; 3. Large tube; 4. Large tube support sleeve. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. Rather, the embodiments of this utility model include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0019] The following description, in conjunction with the accompanying drawings, describes a vertical cooling pipe for internal reflux sand cooling according to an embodiment of the present invention.

[0020] like Figure 1 As shown, the vertical cooling pipe for internal reflux sand cooling in this embodiment of the present invention may include a small pipe 1, a small pipe support 2, a large pipe 3, a centering sleeve 5, and a large pipe support sleeve 4.

[0021] It should be noted that the small tube 1, small tube support 2, large tube 3, centering sleeve 5 and large tube support sleeve 4 described in this embodiment constitute the main components of the cooling structure. The small tube and the large tube are arranged coaxially and fixed by the centering structure to form an internal reflux fluid channel. Compared with the traditional plate unidirectional flow structure, it has the advantages of compact structure and reasonable flow path, and can improve heat transfer efficiency and cooling stability.

[0022] The small tube 1 is arranged axially inside the large tube 3. Both the upper and lower ends of the small tube 1 are open structures. The lower end of the large tube 3 is sealed with a sealing plate, and the upper end is an open structure.

[0023] It should be noted that the small tube 1 described in this embodiment is axially inserted inside the large tube 3, forming a "U-shaped path" in which the fluid flows in through the small tube and then flows out through the large tube. The open structure at the top and bottom facilitates continuous circulation of the cooling fluid inside, while the closed design at the bottom of the large tube 3 forces the fluid to flow back, thereby effectively extending the fluid residence time and improving the heat transfer effect.

[0024] The lower outlet of small tube 1 is aligned with the lower closed end of large tube 3.

[0025] It should be noted that, in this embodiment, the lower end of the small tube 1 is aligned with the bottom sealing plate of the large tube 3, which ensures that the cooling fluid directly enters the closed cavity of the large tube at the end of the small tube, realizing a smooth transition of the fluid path and flow direction control, avoiding the decrease in heat exchange efficiency caused by fluid turbulence or impact, and ensuring internal flow stability.

[0026] Multiple centering sleeves 5 are installed on the outside of the small tube 1. The inner side of the centering sleeve 5 is attached to the outer wall of the small tube 1, and the outer side is attached to the inner wall of the large tube 3.

[0027] It should be noted that the centering sleeve 5 described in this embodiment is used to maintain the coaxial structure between the small tube 1 and the large tube 3, and to prevent the small tube from shifting or shaking due to gravity or fluid disturbance. Multiple centering sleeves 5 are equidistantly arranged along the axial direction to improve the overall support stability of the small tube. At the same time, its double-sided bonding structure can also avoid local stress concentration and improve the shock resistance and durability of the device.

[0028] The small tube support 2 is fixedly connected inside the large tube 3.

[0029] It should be noted that the small tube support 2 described in this embodiment can be fixed to the inner wall of the large tube 3 by welding or mechanical connection, and together with the centering sleeve, it can realize the multi-point support function, which is used to restrict the axial and radial degrees of freedom of the small tube 1, further enhancing the structural strength and operational reliability of the entire device, and is particularly suitable for the use requirements in high-frequency operation or vertical vibration scenarios.

[0030] The large pipe support sleeve 4 is a cylindrical structure, which is sleeved on the upper outer wall of the large pipe 3 and fixedly connected.

[0031] It should be noted that the large pipe support sleeve 4 described in this embodiment is a cylindrical kit that mates with the large pipe 3. Its inner diameter is slightly larger than the outer diameter of the large pipe. After being fitted, it is fixedly connected by welding, screws or clips, which can effectively enhance the overall installation rigidity of the cooling pipe and facilitate rapid assembly with external pre-cooling devices or mounting brackets, thereby improving on-site construction efficiency and structural reliability.

[0032] Specifically, a coaxial and stable inner and outer tube structure is constructed by axially positioning the small tube 1 inside the large tube 3 and installing multiple centering sleeves 5 and small tube supports 2 on the outside of the small tube 1. Cooling fluid enters from the upper end of the small tube 1, exits through the lower end of the small tube 1, flows into the closed cavity at the lower end of the large tube 3, then flows upwards and out from the upper end of the large tube 3, forming a "U-shaped" return path. This effectively extends the flow distance and residence time of the fluid inside the cooling tube, thereby enhancing the heat transfer effect. The two ends of the small tube 1 are open structures, while the lower end of the large tube 3 is sealed with a sealing plate to ensure a stable fluid path, avoid turbulent impact, and improve heat exchange efficiency. The inner side of the centering sleeve 5 is attached to the outer wall of the small tube 1, and the outer side is attached to the inner wall of the large tube 3. This is used to radially position the small tube 1, preventing it from shifting due to gravity or fluid disturbance, while also improving the overall vibration resistance and stability of the structure. The small tube support 2 is fixedly connected to the inner wall of the large tube 3, and works with the centering sleeve 5 to further restrict the axial and radial movement of the small tube 1, enhancing the reliability of the device under high-frequency operation or vertical vibration scenarios. The large tube 3 itself is a straight tube structure with a smooth outer wall, without protrusions or welds, allowing sand and gravel aggregates in contact with it to slide smoothly down the wall, avoiding adhesion and blockage, thus maintaining stable cooling efficiency. The large tube support sleeve 4 is a cylindrical component, fitted onto the upper outer wall of the large tube 3, with an inner diameter slightly larger than the outer diameter of the large tube 3, and is connected to the mounting bracket by welding or screw fixing, achieving rapid fixation and high-strength support for the entire cooling tube. The overall structure is simple and compact, with clear fluid channels. During operation, it effectively avoids problems such as unidirectional short-distance fluid flow, low heat transfer efficiency, and sand and gravel accumulation and blockage that exist in traditional plate cooling devices, improving the overall cooling efficiency, structural stability, and on-site construction adaptability of the system.

[0033] In one embodiment of this utility model, such as Figure 1 As shown, the small tube 1 is vertically installed inside the large tube 3 and is arranged coaxially with the large tube 3.

[0034] It should be noted that the small tube 1 and the large tube 3 described in this embodiment are arranged coaxially in the vertical direction. This not only facilitates the natural flow of fluid under gravity, but also ensures the symmetrical and stable internal cooling flow path, thereby avoiding fluid short circuits or turbulence caused by misalignment. At the same time, the coaxial arrangement combined with the multi-point support structure makes the entire device operate more stably and reliably in high-temperature and high-vibration working environments, further improving the durability and structural strength of the cooling tubes.

[0035] In one embodiment of this utility model, such as Figure 1 As shown, there are multiple centering sleeves 5, which are evenly distributed along the axial direction of the small tube 1.

[0036] It should be noted that the centering sleeves 5 described in this embodiment are evenly spaced along the axial direction outside the small tube 1, which can effectively disperse the support points of the small tube, reduce the force per unit length, and avoid tube deformation or loosening due to localized force concentration. The arrangement of multiple centering sleeves ensures that the small tube 1 is always maintained in the central axis position within the large tube 3, thereby ensuring consistent fluid flow and uniform heat exchange, and enhancing the stability and reliability of the system in long-term operation.

[0037] In one embodiment of this utility model, such as Figure 1 As shown, the large tube 3 is a straight tubular structure with a smooth outer wall.

[0038] It should be noted that the large pipe 3 described in this embodiment adopts a straight pipe design with a smooth outer wall, avoiding the sand adhesion problem caused by welds, bosses, or ribs in traditional structures. The surface treatment of the large pipe can be sandblasting, polishing, or anti-stick coating processes to further improve its anti-adhesion performance, allowing sand and gravel aggregates to slide off its outer surface naturally under gravity, ensuring smooth material flow and no blockage during the operation of the cooling pipe, thereby improving the efficiency and reliability of the entire cooling system.

[0039] In one embodiment of this utility model, such as Figure 1 As shown, the inner diameter of the large tube support sleeve 4 is larger than the outer diameter of the large tube 3, and an annular flange is provided at its bottom.

[0040] It should be noted that the large pipe support sleeve 4 described in this embodiment is installed on the outer wall of the large pipe 3 by a sleeve connection. Its inner diameter is slightly larger than the outer diameter of the large pipe, which facilitates assembly operations. The annular flange at the bottom can serve as a limiting structure to prevent the support sleeve from sliding off due to vibration or gravity, thereby improving installation stability. This structure can also be used with mounting bases or frame components to achieve rapid docking and disassembly of the entire cooling pipe in the equipment, improving the assembly efficiency of the equipment and the convenience of on-site maintenance.

[0041] In summary, the vertical cooling pipe for internal reflux sand cooling in this embodiment of the present invention constructs a structurally stable inner and outer sleeve system by vertically and coaxially arranging the small pipe 1 inside the large pipe 3, and providing multiple equally spaced centering sleeves 5 and small pipe supports 2 on the outside of the small pipe 1. The cooling fluid flows in from the upper end of the small pipe 1, is introduced into the closed cavity at the lower end of the large pipe 3 at the lower outlet of the small pipe 1, and then flows back out along the large pipe 3, forming a "U-shaped" reflux path. This significantly extends the residence time and heat transfer path of the fluid, improving cooling efficiency. The inner side of the centering sleeve 5 is in contact with the outer wall of the small pipe 1, and the outer side is in contact with the large pipe. The inner wall of the 3-tube is fitted to ensure that the small tube 1 remains coaxially positioned during operation, avoiding displacement or shaking, and enhancing structural stability and seismic performance. The large tube 3 is a straight and smooth tube structure, and the sand and gravel aggregate can slide off its outer surface naturally, reducing adhesion and blockage. The large tube support sleeve 4 is installed on the upper end of the large tube 3, with an inner diameter slightly larger than the outer diameter of the large tube. The bottom is provided with an annular flange for limiting and fixing and preventing slippage. The overall structure is reasonably designed and easy to install, overcoming the problems of complex structure, low heat exchange efficiency and easy sand accumulation of traditional plate cooling devices, and achieving the technical effects of high cooling efficiency, smooth flow and stable operation.

[0042] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A vertical cooling pipe for internal reflux sand cooling, characterized in that, It includes a small tube (1), a small tube support (2), a large tube (3), a centering sleeve (5), and a large tube support sleeve (4); The small tube (1) is arranged axially inside the large tube (3). Both ends of the small tube (1) are open structures. The lower end of the large tube (3) is sealed with a sealing plate, and the upper end is an open structure. The lower outlet of the small tube (1) is aligned with the lower closed end of the large tube (3); Multiple centering sleeves (5) are disposed outside the small tube (1), with the inner side of the centering sleeve (5) fitting against the outer wall of the small tube (1) and the outer side fitting against the inner wall of the large tube (3); The small tube support (2) is fixedly connected to the inside of the large tube (3); The large pipe support sleeve (4) is a cylindrical structure, which is sleeved on the upper outer wall of the large pipe (3) and fixedly connected.

2. The vertical cooling pipe for internal reflux sand cooling according to claim 1, characterized in that: The small tube (1) is vertically arranged inside the large tube (3) and is coaxial with the large tube (3).

3. The vertical cooling pipe for internal reflux sand cooling according to claim 1, characterized in that: The centering sleeve (5) consists of multiple sleeves, which are evenly distributed along the axial direction of the small tube (1).

4. The vertical cooling pipe for internal reflux sand cooling according to claim 1, characterized in that: The large tube (3) has a straight tubular structure and a smooth outer wall.

5. The vertical cooling pipe for internal reflux sand cooling according to claim 1, characterized in that: The inner diameter of the large tube support sleeve (4) is larger than the outer diameter of the large tube (3), and an annular flange is provided at its bottom.

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