Vertical heat exchange tube for sand heating

Abstract

This utility model relates to the field of sand heating technology, specifically a vertical heat exchange tube for sand heating. The tube includes a vertical heat exchange tube with several sets of support frames fixedly installed on its inner wall. A return inner tube is fixedly inserted through each support frame. This vertical heat exchange tube for sand heating uses a vertical circular tube, preventing residual material from remaining at bends during discharge. Furthermore, the outer wall of the vertical heat exchange tube is made with a smooth surface, allowing sand and gravel in contact with the outer wall to naturally detach along the tube wall without sticking. This ensures smooth material flow and improves the stability and reliability of the sand heating system.

Description

Technical Field

[0001] This utility model relates to the field of sand heating technology, specifically a vertical heat exchange tube for sand heating. Background Technology

[0002] Sand heating is used to raise the temperature of sand and gravel aggregates to meet the requirements of concrete pouring. In the existing technology, the method of sand and gravel aggregate heating is to install heat exchange coils on the walls of the aggregate bins, and to pass a hot fluid through the coils. The sand and gravel aggregates absorb heat through thermal radiation and thermal conduction to achieve the heating purpose. However, the heating tubes usually adopt U-shaped tubes, serpentine tubes and other structures. Such structures are prone to leaving a small amount of residual material at the bends during material discharge, which requires manual cleaning.

[0003] To enable sand and gravel to fall naturally off the pipe wall without sticking to it, thus ensuring smooth material flow and improving the stability and reliability of the sand heating system, we propose a vertical heat exchange tube for sand heating. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a vertical heat exchange tube for sand heating, which allows sand and gravel to fall naturally along the tube wall without sticking to it, ensuring smooth material flow and improving the stability and reliability of the sand heating system.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A vertical heat exchange tube for sand heating includes a vertical heat exchange tube, several sets of support frames are fixedly installed on the inner wall of the vertical heat exchange tube, and a return inner tube is fixedly inserted on the support frame. The bottom end of the vertical heat exchange tube is closed and the top end is open, and both ends of the return inner tube are open.

[0007] Preferably, the surface of the vertical heat exchange tube is smooth.

[0008] Preferably, the support frame has several sets of through holes.

[0009] Preferably, a support sleeve is fixedly fitted on the outer wall of the vertical heat exchange tube.

[0010] Preferably, both the vertical heat exchange tube and the reflux inner tube are circular tubes.

[0011] Preferably, both the vertical heat exchange tube and the reflux inner tube are made of stainless steel.

[0012] Beneficial effects

[0013] This invention provides a vertical heat exchange tube for sand heating. Compared with the prior art, it has the following advantages:

[0014] This invention relates to a vertical heat exchange tube for sand heating. The heating tube is a vertical round tube, which prevents residual material from remaining at bends during discharge. Furthermore, the outer wall of the vertical heat exchange tube is made into a smooth surface, allowing sand and gravel in contact with the outer wall to fall off naturally along the tube wall without sticking to it. This ensures smooth material discharge and improves the stability and reliability of the sand heating system. Attached Figure Description

[0015] Figure 1 This is a front view structural diagram of the main body of this utility model;

[0016] Figure 2 This is a schematic diagram of the cross-sectional structure of the main body of this utility model;

[0017] Figure 3 This is a schematic diagram of the connection structure between the reflux inner tube and the support frame of this utility model;

[0018] Figure 4 This is a schematic diagram of the support frame structure of this utility model.

[0019] In the diagram: 1. Vertical heat exchange tube; 2. Support sleeve; 3. Return inner tube; 4. Support frame; 5. Through hole. Detailed Implementation

[0020] 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.

[0021] Please see Figure 1-4 This utility model provides a technical solution: a vertical heat exchange tube for sand heating, including a vertical heat exchange tube 1, several sets of support frames 4 are fixedly installed on the inner wall of the vertical heat exchange tube 1, and a return inner tube 3 is fixedly inserted through the support frame 4. The bottom end of the vertical heat exchange tube 1 is closed and the top end is open, and both ends of the return inner tube 3 are open. The surface of the vertical heat exchange tube 1 is smooth.

[0022] In use, hot fluid is injected into the vertical heat exchange tube 1. Since the bottom of the vertical heat exchange tube 1 is sealed, the fluid flows into the return inner tube 3 through the lower end of the return inner tube 3 and then flows out from the upper end of the return inner tube 3, thus forming a zigzag flow channel. During the flow, the fluid transfers heat to the sand and gravel on the outside of the vertical heat exchange tube 1 through heat conduction. The outer wall of the vertical heat exchange tube 1 is made into a smooth surface. The sand and gravel in contact with the outer wall of the vertical heat exchange tube 1 will naturally fall off the tube wall without sticking to the tube wall. This ensures that the sand and gravel fall off the tube wall naturally without sticking to the tube wall, thus achieving smooth sand and gravel discharge and improving the stability and reliability of the sand heating system.

[0023] The support frame 4 has several sets of through holes 5. The through holes 5 allow the fluid to flow without obstruction.

[0024] A support sleeve 2 is fixedly fitted on the outer wall of the vertical heat exchange tube 1. This supports the vertical heat exchange tube 1 and fixes it in place.

[0025] Both the vertical heat exchange tube 1 and the return inner tube 3 are designed as circular tubes. The circular tube design of the vertical heat exchange tube 1 and the return inner tube 3 is less prone to stress concentration, can withstand more pressure, and is less likely to be damaged.

[0026] Both the vertical heat exchange tube 1 and the reflux inner tube 3 are made of stainless steel. Because the vertical heat exchange tube 1 and the reflux inner tube 3 are made of stainless steel, they have the characteristics of corrosion resistance, fast heat conduction, high strength and easy cleaning.

[0027] Working Principle: During operation, hot fluid is injected into the vertical heat exchange tube 1. Because the bottom of the vertical heat exchange tube 1 is sealed, the fluid flows into the return inner tube 3 through its lower end and then out through its upper end, forming a zigzag flow channel. During this flow, the fluid transfers heat to the sand and gravel on the outside of the vertical heat exchange tube 1 through thermal conduction. The outer wall of the vertical heat exchange tube 1 is made with a smooth surface, allowing the sand and gravel in contact with it to naturally detach from the tube wall without sticking. This ensures smooth material flow and improves the stability and reliability of the sand heating system. Furthermore, the circular tube design of the vertical heat exchange tube 1 and the return inner tube 3 reduces stress concentration, allowing them to withstand greater pressure and preventing damage. Additionally, the stainless steel construction of the vertical heat exchange tube 1 and the return inner tube 3 provides corrosion resistance, rapid heat conduction, high strength, and easy cleaning.

[0028] It should be noted that, in this document, relational 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 such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A vertical heat exchange tube for sand heating, comprising a vertical heat exchange tube (1), characterized in that: The vertical heat exchange tube (1) has several sets of support frames (4) fixedly installed on its inner wall. A return inner tube (3) is fixedly inserted on the support frame (4). The bottom of the vertical heat exchange tube (1) is closed and the top is open. Both ends of the return inner tube (3) are open.

2. A vertical heat exchange tube for sand heating according to claim 1, characterized in that: The surface of the vertical heat exchange tube (1) is smooth.

3. The vertical heat exchange tube for sand heating according to claim 1, characterized in that: The support frame (4) has several sets of through holes (5).

4. The vertical heat exchange tube for sand heating according to claim 1, characterized in that: The vertical heat exchange tube (1) is fixedly fitted with a support sleeve (2) on its outer wall.

5. The vertical heat exchange tube for sand heating according to claim 1, characterized in that: Both the vertical heat exchange tube (1) and the reflux inner tube (3) are round tubes.

6. The vertical heat exchange tube for sand heating according to claim 1, characterized in that: Both the vertical heat exchange tube (1) and the reflux inner tube (3) are made of stainless steel.

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