Integral spiral finned tube self-cleaning structure

Abstract

The utility model discloses an integral spiral finned tube self-cleaning structure, which relates to the technical field of spiral finned tubes and comprises a mother tube, filter screens are arranged at two ends of the inner wall of the mother tube and used for coarsely screening particles and reducing larger particles entering the inner wall of the finned tube, and mounting grooves are formed in opposite sides of the two groups of filter screens and used for mounting a rotating shaft. And one side of the mounting groove is rotationally connected with the rotating shaft, the spiral blades are conveniently driven to rotate under the impact action of fluid, the spiral blades are arranged on the outer side of the rotating shaft, and the spiral blades synchronously rotate under the impact of the fluid, so that the resistance is minimum. The rotating shaft and the spiral blades are arranged in the mother pipe and synchronously rotate under the impact effect of fluid, the rotor part and the fluid interact to generate vortex, mixing of the near wall face and the central area of the fluid is enhanced, the shearing effect on a flowing boundary layer is enhanced, and therefore the fluid is thinned, heat transfer can be enhanced, and heat transfer efficiency is improved. Meanwhile, the deposition of dirt is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of spiral finned tubes, in particular to an integral spiral finned tube self-cleaning structure. Background Art

[0002] In the existing heat exchange equipment, spiral finned tubes are widely used because they have greatly improved the effect of expanding the heating surface and strengthening the heat exchange effect compared with traditional finned tubes. In order to strengthen the heat exchange, the fin spacing of the finned tube is usually very small, and the fin area can account for more than 85% of the total heat exchange area, but this also brings great difficulties to the cleaning of dust accumulation on the finned tube. The dirt and dust on the surface of the finned tube will greatly reduce the heat exchange efficiency of the finned tube. If the surface of the finned tube has a self-cleaning function, the dust removal of the spiral finned tube during use is very convenient and quick, and even no cleaning and dust removal is required, which will greatly reduce the loss of manpower and material resources, while ensuring the heat exchange efficiency of the finned tube.

[0003] For example, a self-cleaning spiral fin tube proposed in the comparative document CN104296582A includes a base tube, fins, a micro-nano structure layer, and a hydrophobic coating. The fins are spirally welded to the outer wall of the base tube and fixedly connected to the base tube through the ends of the fins. The outer surfaces of the fins and the exposed parts of the base tubes have a micro-nano structure layer, and the micro-nano structure layer is covered with a hydrophobic layer, which can greatly reduce dust accumulation on the surface of the fin tubes, and makes cleaning more convenient and quick, thereby ensuring the heat exchange efficiency of the fin tubes.

[0004] When the above-mentioned self-cleaning spiral fin tube is in use, dust accumulation always exists, and the cleaning effect on the spiral fin tube is not obvious. Utility Model Content

[0005] Based on this, the purpose of the utility model is to provide an integral spiral fin tube self-cleaning structure to solve the technical problem that dust accumulation always exists when the above-mentioned self-cleaning spiral fin tube is in use, and the cleaning effect of the spiral fin tube is not obvious.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an integral spiral fin tube self-cleaning structure, comprising a mother tube, both ends of the inner wall of the mother tube are provided with filter screens to coarsely screen particles and reduce the entry of larger particles into the inner wall of the fin tube, two sets of filter screens are provided on the opposite sides with mounting grooves for installing a rotating shaft, one side of the mounting groove is rotatably connected with a rotating shaft, so that the spiral blades can be driven to rotate under the impact of the fluid, and the outer side of the rotating shaft is provided with spiral blades, which can rotate synchronously under the impact of the fluid through the provided spiral blades to minimize the resistance, interact with the fluid, enhance the shearing effect on the flow boundary layer to make it thinner, and achieve the flow rate conditions for destroying the growth of dirt and the purpose of enhancing heat transfer.

[0007] Preferably, fins are provided on the outside of the mother tube, and openings are provided on the outside of the fins so that the gas no longer flows in a single direction, allowing the airflow to more easily penetrate into the roots of the fins and blow away the dust on and at the roots of the fins. A through hole is provided on the top of the fin to discharge the dust blown away by the airflow and prevent the dust from solidifying due to long-term accumulation.

[0008] Preferably, the number of the openings is multiple groups, the multiple groups of openings are evenly distributed along the outer edge of the fin, and the openings are concave. The concave setting of the openings allows obvious airflow separation in the flow direction of the gas.

[0009] Preferably, the number of the through holes is multiple groups, and the multiple groups of through holes are evenly distributed along the top of the fin, and the through holes are the center of the circle, which are used to cooperate with the opening to further increase the spoiler effect.

[0010] Preferably, the hole sizes of the two groups of filter screens are not equal. The two groups of filter screens are used to coarsely screen the particles. The filter screen with smaller holes is used to block larger particles, and the filter screen with larger holes cooperates with the spiral blades to discharge the particles on the inner wall of the mother tube.

[0011] Preferably, the cross section of the fin is trapezoidal, and the fin is an integrally formed structure with respect to the mother tube, so that the fin tube is not prone to dust accumulation, dust blockage, etc.

[0012] In summary, the utility model mainly has the following beneficial effects:

[0013] 1. The utility model sets a rotating shaft and spiral blades in the mother pipe, which rotate synchronously under the impact of the fluid. The rotor part interacts with the fluid to generate vortices, which strengthens the mixing of the fluid near the wall and the central area, enhances the shearing effect on the flow boundary layer to make it thinner, and can achieve enhanced heat transfer while effectively reducing the deposition of dirt.

[0014] 2. The utility model sets multiple groups of evenly distributed openings on the outer edge of the fin, so that the flow direction of the gas is obviously separated. The gas no longer flows in a single direction parallel to the upper and lower surfaces of the fin. When the gas flows between the fins, the distance between the opening and the fin connection becomes shorter, and the airflow can easily penetrate into the root of the fin, which can disturb and blow away the dust on the fin and the root, preventing the dust from long-term accumulation and solidification. The fin efficiency is improved, and the heat exchange effect is further enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the rotating shaft structure of the utility model;

[0017] Figure 3 It is a schematic diagram of the opening structure of the utility model.

[0018] In the figure: 1, mother tube; 2, fin; 3, filter screen; 4, mounting groove; 5, rotating shaft; 6, spiral blade; 7, opening; 8, through hole. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. The embodiments described below with reference to the drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model.

[0020] The following describes an embodiment of the utility model based on its overall structure.

[0021] An integral spiral fin tube self-cleaning structure, such as Figure 1-3 As shown, it includes a mother tube 1, and both ends of the inner wall of the mother tube 1 are provided with filter screens 3 to perform coarse screening of particles to reduce the entry of larger particles into the inner wall of the finned tube. The two sets of filter screens 3 are provided with mounting grooves 4 on the opposite sides to each other for mounting a rotating shaft 5. The rotating shaft 5 is rotatably connected to one side of the mounting groove 4, so as to drive the spiral blade 6 to rotate under the impact of the fluid. The outer side of the rotating shaft 5 is provided with spiral blades 6. The spiral blades 6 are provided to rotate synchronously under the impact of the fluid to minimize the resistance, interact with the fluid, enhance the shearing effect on the flow boundary layer to make it thinner, and achieve the flow velocity conditions for destroying the growth of dirt and the purpose of enhancing heat transfer.

[0022] The cross section of the fin 2 is trapezoidal, and the fin 2 is an integrally formed structure with respect to the mother tube 1, so that the fin tube is not prone to dust accumulation, dust blockage, etc.

[0023] Please refer to Figure 1 and Figure 2 The hole sizes of the two groups of filter screens 3 are not equal. The two groups of filter screens 3 are used to coarsely screen the particles. The filter screen 3 with smaller holes is used to block larger particles. The filter screen 3 with larger holes cooperates with the spiral blades 6 to discharge the particles on the inner wall of the mother tube 1.

[0024] Please refer to Figure 3 The number of openings 7 is multiple groups, and the multiple groups of openings 7 are evenly distributed along the outer edge of the fin 2, and the openings 7 are concave. The concave setting of the openings 7 makes the gas flow direction have obvious airflow separation;

[0025] There are multiple groups of through holes 8, which are evenly distributed along the top of the fin 2, and the through holes 8 are the center of the circle, which are used to cooperate with the opening 7 to further increase the turbulence effect.

[0026] Please refer to Figure 3 The outer side of the mother tube 1 is provided with fins 2, and the outer side of the fins 2 is provided with openings 7, so that the gas does not flow in a single direction, and the airflow can more easily penetrate into the root of the fin 2 to blow away the dust on and at the root of the fin 2. A through hole 8 is provided on the top of the fin 2 to discharge the dust blown away by the airflow to prevent the dust from solidifying due to long-term accumulation.

[0027] Although an embodiment of the utility model has been shown and described, this specific embodiment is merely an explanation of the utility model and is not a limitation of the utility model. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contributions as needed without departing from the principles and purpose of the utility model. However, as long as they are within the scope of the claims of the utility model, they are protected by patent law.

Claims

1. An integral spiral fin tube self-cleaning structure, comprising a mother tube (1), characterized in that: Both ends of the inner wall of the mother tube (1) are provided with filter screens (3), and installation grooves (4) are provided on opposite sides of the two groups of filter screens (3). A rotating shaft (5) is rotatably connected to one side of the installation groove (4), and a spiral blade (6) is provided on the outer side of the rotating shaft (5).

2. The integral spiral fin tube self-cleaning structure according to claim 1, characterized in that: The outer side of the mother tube (1) is provided with a fin (2), the outer side of the fin (2) is provided with an opening (7), and the top of the fin (2) is provided with a through hole (8).

3. The integral spiral fin tube self-cleaning structure according to claim 2, characterized in that: The number of the openings (7) is multiple groups, and the multiple groups of openings (7) are evenly distributed along the edge of the outer side of the fin (2), and the openings (7) are concave.

4. The integral spiral fin tube self-cleaning structure according to claim 2, characterized in that: The number of the through holes (8) is multiple groups, and the multiple groups of through holes (8) are evenly distributed along the top of the fin (2), and the through hole (8) is the center of the circle.

5. The integral spiral fin tube self-cleaning structure according to claim 1, characterized in that: The hole sizes of the two sets of filter screens (3) are not equal.

6. The integral spiral fin tube self-cleaning structure according to claim 1, characterized in that: The cross section of the fin (2) is trapezoidal.

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