Cooling pipe row

Abstract

The utility model discloses a cooling tube bank which comprises a plurality of sets of finned tubes, each finned tube comprises an oval tube and a plurality of fins, the fins are arranged on the two horizontal sides of the oval tube in the long axis direction and one side face of the oval tube in the short axis direction, and a heat insulation layer or a heat preservation layer is arranged on the other side face of the oval tube in the short axis direction. A first pipeline and a second pipeline are arranged at the two ends of each finned tube respectively, and the multiple sets of finned tubes are arranged side by side in the long axis direction of the finned tubes and connected through the first pipelines and the second pipelines and used for increasing the heat exchange area of the cooling tube row. According to the utility model, the elliptical tube formed by pressing the circular tube is adopted, the fins are welded on the two horizontal sides of the elliptical tube in the long axis direction and on one side of the elliptical tube in the short axis direction, and the finned tubes are arranged along the long axis direction, so that the heat exchange area is increased, the heat exchange efficiency is improved, and the cost and the weight are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of roller kilns, in particular to a cooling tube row. Background Art

[0002] With the rapid development of the lithium battery industry, the demand for graphitization equipment is increasing. The mainstream graphitization equipment on the market is the roller kiln, and the cooling tube row of the roller kiln is one of the key components. The common design in the roller kiln system on the market is to use multiple round tubes welded around the fins, and these cooling fin tubes are connected in series to form a cooling tube row. This cooling tube row has the following disadvantages:

[0003] 1. Small heat exchange area and heavy weight: The circular finned tube has a small heat exchange area and is heavier under the same heat exchange area, which will increase the cost and burden the installation structure. In addition, the gap between adjacent finned tubes is large, which easily causes heat to dissipate from the gap, requiring an additional insulation layer.

[0004] 2. Low heat exchange efficiency: The heat exchange efficiency of the finned tube is high only on the side in contact with the material, while the heat exchange efficiency on the other side is low. This results in not only poor heat exchange effect on the back of the circular finned tube, but also increases its quality and cost.

[0005] 3. Difficult processing and high cost: The existing round tube plus round fins or spirally wound fins are difficult to process, especially for long high-temperature sintering kilns, which require a large number of cooling fin tubes, increasing costs. Utility Model Content

[0006] In order to overcome the shortcomings of the prior art, the utility model provides a cooling tube row, which is an elliptical tube formed by pressing a round tube. Fins are welded on both horizontal sides of the long axis direction of the elliptical tube and on one side of the short axis direction of the elliptical tube, and the finned tubes are arranged along the long axis direction, thereby increasing the heat exchange area, improving the heat exchange efficiency and reducing the cost and weight.

[0007] The technical solution adopted by the utility model to solve its technical problems is:

[0008] A cooling tube row comprises a plurality of groups of finned tubes, wherein the finned tubes comprise an elliptical tube and a plurality of fins, wherein the fins are arranged on two horizontal sides of the elliptical tube in the direction of the long axis and on one side of the elliptical tube in the direction of the short axis, and a heat insulating layer or a thermal insulation layer is arranged on the other side of the elliptical tube in the direction of the short axis, and a first pipe and a second pipe are respectively arranged at both ends of the finned tube, and the plurality of groups of finned tubes are arranged side by side along the direction of the long axis and connected by the first pipe and the second pipe, so as to increase the heat exchange area of ​​the cooling tube row.

[0009] As a preferred technical solution, the first pipe is provided with a water inlet and a water outlet connected thereto, the water inlet and the water outlet are arranged on the same side, and a cooling water circuit with water inlet and water outlet on the same side is formed by the fin tube and the pipe.

[0010] As a preferred technical solution, two partitions are provided in the first pipe, and the partitions divide the first pipe into a water inlet pipe, a water outlet pipe and a first circulation pipe. A partition is provided in the second pipe, and the partition divides the second pipe into a second circulation pipe and a third circulation pipe. One end of the water inlet pipe is connected to the water inlet, and the other end is connected to the second circulation pipe through a fin tube; one end of the water outlet pipe is connected to the water outlet, and the other end is connected to the third circulation pipe through a fin tube; the first circulation pipe is connected to the second circulation pipe and the third circulation pipe respectively through the fin tubes.

[0011] As a preferred technical solution, the length of the fin is smaller than the length of the elliptical tube.

[0012] As a preferred technical solution, the distances between two adjacent fins on the elliptical tube are equal.

[0013] As a preferred technical solution, there is a gap between two adjacent elliptical tubes.

[0014] As a preferred technical solution, the fins are straight fins, corrugated fins or serrated fins.

[0015] The beneficial effect of the utility model is as follows: the utility model provides a cooling tube row, which is an elliptical tube formed by pressing a round tube. Fins are welded on both horizontal sides of the long axis direction of the elliptical tube and on one side of the short axis direction of the elliptical tube, and the fin tubes are arranged along the long axis direction, thereby increasing the heat exchange area, improving the heat exchange efficiency and reducing the cost and weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1 This is a schematic diagram of a cooling tube row structure provided by an example of the utility model;

[0018] Figure 2 yes Figure 1 A partial enlarged view of the middle A;

[0019] Figure 3 This is a cross-sectional view of a cooling tube row provided by an example of the utility model;

[0020] Figure 4 The utility model is a schematic diagram of a cooling water circulation of a cooling tube row provided in one embodiment.

[0021] Figure numerals: 1, fin tube; 11, elliptical tube; 12, fin; 21, first pipe; 211, water inlet pipe; 212, first circulation pipe; 213, water outlet pipe; 22, second pipe; 221, second circulation pipe; 222, third circulation pipe; 3, water inlet; 4, water outlet. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the concept, specific structure and technical effects of the utility model in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the utility model. In addition, all the connection / connection relationships involved in the patent do not refer to the direct connection of components, but refer to the formation of a better connection structure by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the creation of the utility model can be combined interchangeably without conflicting with each other.

[0023] This patent is mainly used in the cooling of high-temperature sintering roller kilns. Its function is to cool the materials on the conveying roller to a certain temperature through the upper and lower rows of cooling pipes.

[0024] Please refer to Figure 1-Figure 4 A cooling tube row provided in an example of the utility model comprises a plurality of groups of fin tubes 1, wherein the fin tubes 1 comprise an elliptical tube 11 and fins 12, wherein the fins 12 are arranged on both horizontal sides of the long axis direction of the elliptical tube 11 and on one side of the short axis direction of the elliptical tube 11, and the other side of the short axis direction of the elliptical tube 11 is provided with a heat insulation layer or a thermal insulation layer, and a first pipe 21 and a second pipe 22 are respectively provided at both ends of the fin tube 1, and the plurality of groups of fin tubes 1 are arranged side by side along the long axis direction thereof and connected by the first pipe 21 and the second pipe 22, so as to increase the heat exchange area of ​​the cooling tube row.

[0025] The utility model adopts an elliptical tube pressed from a round tube, and fins 12 are welded on both horizontal sides of the elliptical tube 11 in the long axis direction and on one side of the elliptical tube in the short axis direction, and the finned tube 1 is arranged along its long axis direction, thereby increasing the heat exchange area, improving the heat exchange efficiency and reducing the cost and weight.

[0026] Specifically, the length of the fin 12 is smaller than the length of the elliptical tube 11 , the intervals between two adjacent fins 12 on the elliptical tube 11 are equal, and there is a gap between two adjacent elliptical tubes 11 .

[0027] In this embodiment, the fins 12 may be straight fins, corrugated fins or serrated fins.

[0028] The oval tube 11 is formed by pressing a round tube, and compared with a round tube of the same specification, it provides a larger heat exchange area under the condition of the same weight and the same length.

[0029] The fins 12 are welded on both horizontal sides of the long axis direction of the elliptical tube 11, which reduces the gap between adjacent fin tubes 1 and reduces the heat dissipation; the fins 12 are welded on one side of the short axis direction of the elliptical tube 11, and the other side is provided with a heat insulation layer or a thermal insulation layer to reduce heat loss. Since the back of the elliptical tube 11 belongs to the inefficient heat exchange area, if the fins 12 are welded, the heat exchange efficiency of the fins 12 is not high, but the weight of the fin tube 1 is increased. Therefore, compared with the design of the traditional cooling tube row, a heat insulation layer or a thermal insulation layer is provided on the back of the elliptical tube 1 to reduce the weight of the cooling tube row. In the specific implementation, the material, shape, size and number of the fin tube 1 need to be selected according to the actual application scenario. For example, for some scenarios that require efficient cooling, thinner fin tubes 1 and tighter fin tube 1 arrangements can be used; for some scenarios that require a larger heat exchange area, larger diameter fin tubes 1 and more fins 12 can be selected.

[0030] In the above cooling tube row, a first pipe 21 and a second pipe 22 are respectively provided at both ends of the fin tube 1, and the first pipe 21 is provided with a water inlet 3 and a water outlet 4 connected thereto, the water inlet 3 and the water outlet 4 are arranged on the same side, and a cooling water circuit with water inlet and outlet on the same side can be formed through the fin tube 1 and the pipe.

[0031] Two partitions are provided in the first pipe 21, and the partitions divide the first pipe 21 into an inlet pipe 211, an outlet pipe 213 and a first circulation pipe 212. A partition is provided in the second pipe 22, and the partition divides the second pipe 22 into a second circulation pipe 221 and a third circulation pipe 222. One end of the inlet pipe 211 is connected to the water inlet 3, and the other end is connected to the second circulation pipe 221 through the fin tube 1; one end of the outlet pipe 213 is connected to the water outlet 4, and the other end is connected to the third circulation pipe 222 through the fin tube 1; the first circulation pipe 212 is connected to the second circulation pipe 221 and the third circulation pipe 222 respectively through the fin tube 1.

[0032] When the roller conveys the sagger carrying the material from the high-temperature heating area to the cooling area, the sagger slowly moves forward in the cooling area while exchanging heat with the cooling pipe rows above and below the sagger, thereby cooling the material. In this process, the heat is mainly radiated from the sagger to the surroundings, and its main heat exchange area is located on the surface relative to the sagger, that is, the lower surface of the upper cooling pipe row and the upper surface of the lower cooling pipe row, while the heat exchange effect of the surface facing away from the sagger is poor. Therefore, multiple fins 12 are welded on the surface relative to the sagger to increase the heat exchange area, thereby improving the heat exchange efficiency. A heat insulation layer or thermal insulation layer is set on the surface facing away from the sagger to reduce heat loss.

[0033] The above is a specific description of the preferred implementation of the utility model, but the invention of the utility model is not limited to the described embodiments. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the utility model. These equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A cooling tube bank, characterized in that: It comprises a plurality of groups of finned tubes, wherein the finned tubes comprise an elliptical tube and a plurality of fins, wherein the fins are arranged on both horizontal sides of the long axis direction of the elliptical tube and on one side of the short axis direction of the elliptical tube, and the other side of the short axis direction of the elliptical tube is provided with a heat insulating layer or a thermal insulation layer, and a first pipe and a second pipe are respectively provided at both ends of the finned tube, and the plurality of groups of finned tubes are arranged side by side along the long axis direction thereof and connected through the first pipe and the second pipe, so as to increase the heat exchange area of ​​the cooling tube row.

2. The cooling tube bank according to claim 1, characterized in that: The first pipe is provided with a water inlet and a water outlet connected thereto, the water inlet and the water outlet are arranged on the same side, and a cooling water circuit with water inlet and water outlet on the same side is formed through the fin tube and the pipe.

3. The cooling tube bank according to claim 2, characterized in that: Two partitions are provided in the first pipe, and the partitions divide the first pipe into a water inlet pipe, a water outlet pipe and a first circulation pipe. A partition is provided in the second pipe, and the partition divides the second pipe into a second circulation pipe and a third circulation pipe. One end of the water inlet pipe is connected to the water inlet, and the other end is connected to the second circulation pipe through a fin tube; one end of the water outlet pipe is connected to the water outlet, and the other end is connected to the third circulation pipe through a fin tube; the first circulation pipe is connected to the second circulation pipe and the third circulation pipe respectively through the fin tube.

4. The cooling tube bank according to claim 1, characterized in that: The length of the fin is smaller than the length of the elliptical tube.

5. The cooling tube bank according to claim 1, characterized in that: The distances between two adjacent fins on the elliptical tube are equal.

6. The cooling tube bank according to claim 1, characterized in that: There is a gap between two adjacent elliptical tubes.

7. The cooling tube bank according to claim 1, characterized in that: The fins are straight fins, corrugated fins or serrated fins.

Images