Air exhaust structure capable of improving heat exchange efficiency of U-shaped heat exchange tube bundle

Abstract

The utility model relates to an air exhaust structure, in particular to an air exhaust structure capable of improving the heat exchange efficiency of a U-shaped heat exchange tube bundle. The utility model aims to solve the problem that the heat exchange efficiency of a heat exchanger is reduced due to the fact that a bent section of a U-shaped heat exchange tube bundle is not provided with an air extractor in the prior art. The U-shaped cover is simple in structure and compact in size, the outer circumferential face of the U-shaped cover faces the inner arc side of the U-shaped heat exchange tube bundle, a plurality of through holes are formed in the U-shaped cover, the U-shaped cover is fixedly connected to the heat exchange tube supporting plate, and the two end baffles are fixedly connected to the two end faces of the U-shaped cover respectively. One side face of the heat exchange pipe supporting plate, the inner surface of the U-shaped cover and the two end baffles define an air exhaust inner cavity, the air exhaust pipe is fixedly connected to the heat exchange pipe supporting plate, and the air exhaust pipe is communicated with the air exhaust inner cavity, so that steam efficiently flows on the bent section, heat exchange is sufficient, the heat exchange efficiency of the heat exchanger is improved, the equipment weight is reduced, and material consumption and manufacturing cost are reduced. The utility model belongs to the technical field of heat exchanger auxiliary equipment.

Description

Technical Field

[0001] The utility model relates to an air extraction structure, in particular to an air extraction structure capable of improving the heat exchange efficiency of a U-shaped heat exchange tube bundle, and belongs to the technical field of heat exchanger auxiliary equipment. Background Art

[0002] At present, in the centripetal steam heat exchanger using U-shaped heat exchange tube bundles, the bending section is generally not equipped with an exhaust device, which causes the steam to form a stagnation zone in the bending section, and then the bending section basically loses its heat exchange function.

[0003] In high-power power units, the bending section area of ​​the heat exchanger accounts for about 5% of the total heat exchange area. If the bending section area is not utilized, the heat exchange efficiency of the heat exchanger will be reduced. In order to ensure the heat exchange efficiency, the length of the heat exchange tube has to be increased, resulting in an increase in manufacturing costs.

[0004] In summary, an air extraction structure is proposed to solve the above technical problems, which has become a problem that needs to be solved urgently by technicians in this field. Utility Model Content

[0005] In view of the above-mentioned deficiencies in the prior art, the utility model provides an air extraction structure capable of improving the heat exchange efficiency of a U-shaped heat exchange tube bundle.

[0006] The technical solution of the utility model is: an exhaust structure capable of improving the heat exchange efficiency of a U-shaped heat exchange tube bundle, comprising a heat exchange tube support plate installed on the U-shaped heat exchange tube bundle, an exhaust pipe, a U-shaped cover and two end baffles.

[0007] The outer circumference of the U-shaped cover faces the inner arc side of the U-shaped heat exchange tube bundle. The U-shaped cover is provided with a plurality of through holes. The U-shaped cover is fixedly connected to the heat exchange tube support plate. The two end baffles are respectively fixedly connected to the two end surfaces of the U-shaped cover.

[0008] A side surface of the heat exchange tube support plate, the inner surface of the U-shaped cover and two end baffles form an exhaust cavity. The exhaust pipe is fixedly connected to the heat exchange tube support plate, and the exhaust pipe is communicated with the exhaust cavity.

[0009] Compared with the prior art, the utility model has the following effects:

[0010] The utility model has a simple structure and a compact volume, enables steam to flow efficiently in the bending section and fully exchange heat, realizes the utilization of the bending section area of ​​the U-shaped heat exchange tube bundle 4, improves the heat exchange efficiency of the heat exchanger, reduces equipment weight, and reduces material consumption and manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a cross-sectional view of the utility model;

[0012] Figure 2It is a top view of the utility model.

[0013] In the figure: 1. end baffle; 2. cover shell; 3. exhaust pipe; 4. U-shaped heat exchange tube bundle; 5. heat exchange tube support plate. DETAILED DESCRIPTION

[0014] In order to make the utility model objectives, features and advantages of the utility model more obvious and easy to understand, the technical solutions in the implementation modes of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation modes of the utility model.

[0015] Specific implementation method 1: Combination Figure 1 to Figure 2 To illustrate this embodiment, an exhaust structure capable of improving the heat exchange efficiency of a U-shaped heat exchange tube bundle comprises a heat exchange tube support plate 5 installed on a U-shaped heat exchange tube bundle 4, and also comprises an exhaust pipe 3, a U-shaped cover 2 and two end baffles 1.

[0016] The outer circumferential surface of the U-shaped cover 2 faces the inner arc side of the U-shaped heat exchange tube bundle 4. The U-shaped cover 2 is provided with a plurality of through holes. The U-shaped cover 2 is fixedly connected to the heat exchange tube support plate 5. The two end baffles 1 are respectively fixedly connected to the two end surfaces of the U-shaped cover 2.

[0017] One side surface of the heat exchange tube support plate 5, the inner surface of the U-shaped cover 2 and the two end baffles 1 form an exhaust cavity, and the exhaust pipe 3 is fixed to the heat exchange tube support plate 5, and the exhaust pipe 3 is connected to the exhaust cavity.

[0018] Specific implementation method 2: Combination Figure 1 to Figure 2 The present embodiment is described. In the present embodiment, the end baffle 1 and the end surface of the U-shaped cover 2 are connected by welding.

[0019] Furthermore, the U-shaped cover 2 is connected to the heat exchange tube support plate 5 by welding.

[0020] Furthermore, the exhaust pipe 3 is connected to the heat exchange tube support plate 5 by welding.

[0021] Other components and connection relationships are the same as those in the first specific implementation method.

[0022] Specific implementation method three: Combination Figure 1 and Figure 2 To explain this embodiment, the exhaust pipe 3, the U-shaped cover 2 and the two end baffles 1 in this embodiment are all made of stainless steel or carbon steel. Other components and connection relationships are the same as those in the first or second embodiment.

[0023] How it works

[0024] The outer circumferential surface of the U-shaped cover 2 faces the inner arc side of the U-shaped heat exchange tube bundle 4. One side surface of the heat exchange tube support plate 5, the inner surface of the U-shaped cover 2 and the two end baffles 1 form an exhaust cavity. The exhaust pipe 3 is fixed to the heat exchange tube support plate 5. The exhaust pipe 3 is connected to the exhaust cavity. The steam located at the bending section of the U-shaped heat exchange tube bundle 4 enters the exhaust cavity through the through hole on the U-shaped cover 2, and is then extracted by the exhaust pipe 3, thereby achieving the purpose of improving the heat exchange efficiency.

[0025] The present invention has been disclosed as above in the form of a preferred embodiment, but it is not intended to limit the present invention. Any simple modification, equivalent changes and modifications made to the above implementation cases by any professional and technical personnel who do not deviate from the content of the technical solution of the present invention and based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An exhaust structure capable of improving the heat exchange efficiency of a U-shaped heat exchange tube bundle, comprising a heat exchange tube support plate (5) installed on the U-shaped heat exchange tube bundle (4), characterized in that: It also includes an exhaust pipe (3), a U-shaped cover (2) and two end baffles (1); The outer circumferential surface of the U-shaped cover (2) faces the inner arc side of the U-shaped heat exchange tube bundle (4), a plurality of through holes are formed on the U-shaped cover (2), the U-shaped cover (2) is fixedly connected to the heat exchange tube support plate (5), and the two end baffles (1) are respectively fixedly connected to the two end surfaces of the U-shaped cover (2); A side surface of the heat exchange tube support plate (5), the inner surface of the U-shaped cover (2) and the two end baffles (1) form an exhaust cavity, the exhaust pipe (3) is fixedly connected to the heat exchange tube support plate (5), and the exhaust pipe (3) is connected to the exhaust cavity.

2. The exhaust structure capable of improving the heat exchange efficiency of the U-shaped heat exchange tube bundle according to claim 1, characterized in that: The end baffle (1) is welded to the end surface of the U-shaped cover (2).

3. The exhaust structure capable of improving the heat exchange efficiency of the U-shaped heat exchange tube bundle according to claim 2, characterized in that: The U-shaped cover (2) is connected to the heat exchange tube support plate (5) by welding.

4. The exhaust structure capable of improving the heat exchange efficiency of the U-shaped heat exchange tube bundle according to claim 3, characterized in that: The air extraction pipe (3) is connected to the heat exchange pipe support plate (5) by welding.

5. The exhaust structure capable of improving the heat exchange efficiency of the U-shaped heat exchange tube bundle according to claim 4, characterized in that: The exhaust pipe (3), the U-shaped cover (2) and the two end baffles (1) are all made of stainless steel or carbon steel.

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