A type air cooler capable of releasing heat displacement

Abstract

The present invention relates to a heat exchange device. The technical solution is: an A-type air cooler capable of releasing heat displacement, comprising a plurality of air cooling units; each air cooling unit comprises an A-shaped frame, a tube bundle consisting of a plurality of finned tubes arranged parallel to each other and laid on two inclined slopes of the A-shaped frame from top to bottom, a steam distribution pipe arranged at the top of the A-shaped frame and connected to the tube bundle, a junction box respectively arranged at the bottom of the two inclined slopes and connected to the tube bundle, and a fan drive system installed at the center below the A-shaped frame and spraying cooling air to the tube bundle; the characteristics are: the two ends of the tube bundle are fixedly connected to the frame through the steam distribution box and the junction box respectively; the junction box is padded at the bottom of the frame and movably positioned on the beam frame platform surface, so that the horizontal heat displacement can be automatically released by sliding after the tube bundle is heated. The air cooler can automatically adjust the heat displacement amount according to needs to ensure the normal operation of the air cooler.

Description

Technical Field

[0001] The invention relates to a heat exchange device, in particular to an A-type air cooler. Background Art

[0002] A-type air cooler is a heat exchange equipment used for condensation and cooling in petrochemical and oil and gas processing production, including several air cooling units; each air cooling unit is usually composed of a tube bundle, a tube box, a fan drive system, a steam distribution pipe and a frame, etc. The tube bundle is the main heat exchange element. In the existing A-type air cooler, the tops of the multiple finned tubes that make up each group of tube bundles are respectively inserted and welded to the upper tube plate 8-1, and the edges of the upper tube plate are respectively fixed to the waist groove 8-2 of the frame rib plate by several bolts (the bolts and the waist grooves that match the bolts constitute a bolt adjustment groove structure; see Fig. 9 ); Therefore, each group of tube bundles can make a certain distance (determined by the length of the waist groove) of thermal displacement in the horizontal direction. The bottoms of the multiple finned tubes are inserted and welded to the lower tube plate 8-3 (see Fig.10 , finned tubes are omitted in the figure), the edges of the lower tube plate are fixed to the frame 8 by a plurality of bolts, and the bottom end 8-4 of the frame is directly mounted on the beam frame.

[0003] When the air cooler is working, negative pressure steam needs to be introduced into the tube bundle, and the temperature difference change will cause thermal displacement of the tube bundle; the change in the length direction of the tube bundle can be released by the bending of the tube bundle itself; but the thermal displacement in the horizontal direction of the air cooler cannot be adjusted by the steam distribution pipe (the steam distribution pipes of each air cooling unit in the air cooler are arranged in a straight line and connected in sequence, so the thermal displacement adjustment is limited), and can only be released mainly by the tube bundle itself; however, the slot structure between the tube bundle and the frame is difficult to meet the thermal displacement requirements (the sliding distance achieved by the slot structure is short, and the thermal displacement release is limited), which can easily cause deformation of rigid components and affect the normal operation of the Type A air cooler. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned background technology and provide an A-type air cooler that can completely release thermal displacement. The air cooler can automatically adjust the thermal displacement amount according to needs to ensure the normal operation of the air cooler.

[0005] The technical solution provided by the present invention is: an A-type air cooler capable of releasing heat displacement, comprising a plurality of air cooling units; each air cooling unit comprises an A-shaped frame, a tube bundle consisting of a plurality of fin tubes arranged parallel to each other and laid on two inclined slopes of the A-shaped frame from top to bottom, a steam distribution pipe arranged at the top of the A-shaped frame and connected to the tube bundle, a junction box respectively arranged at the bottom ends of the two inclined slopes and connected to the tube bundle, and a fan drive system installed at the center below the A-shaped frame and spraying cooling air to the tube bundle; the characteristics are: the two ends of the tube bundle are fixedly connected to the frame through the steam distribution box and the junction box respectively; the junction box is padded at the bottom end of the frame and movably positioned on the beam frame platform surface, so that the horizontal heat displacement can be automatically released by sliding after the tube bundle is heated.

[0006] One side of the steam distribution pipe is fixedly connected to the top end of the frame through a fastener, and one side of the junction box is fixedly connected to the bottom end of the frame through a fastener.

[0007] The outside of the junction box is provided with a reinforcing rib plate for increasing rigidity.

[0008] The bottom of the junction box is provided with a triangular column-shaped sliding frame.

[0009] The working principle of the present invention is: steam enters the downstream tube bundle from the steam distribution pipe at the top of the frame, and is continuously condensed while going down along the downstream tube bundle; uncondensed steam flows to the countercurrent tube bundle through the manifold, steam goes up and is continuously condensed, condensed water goes down, and non-condensable gas gathers at the upper tube box of the countercurrent tube bundle, and is then extracted and emptied; condensed water gathers in the manifold box at the bottom of the tube bundle and is transported outward under the action of gravity. The present invention changes the sealing plate (the lower tube plate connecting the tube bundle) structure into a part of the manifold box, which not only enhances the sealing performance, but also the formed manifold box can play a role in supporting the air cooler after being fixed to the bottom end of the frame, and can also automatically adjust the thermal displacement on the beam frame as a whole after being heated, thereby ensuring the normal operation of the air cooler.

[0010] The beneficial effects of the present invention are:

[0011] 1. During operation, the tube bundle can slide as a whole, thereby effectively releasing thermal displacement and providing the possibility for designing a longer tube bundle solution.

[0012] 2. The combiner box not only collects and outputs condensed water, but also enhances the sealing performance of the bottom of the tube bundle, simplifying the structural design and installation workload. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the main structure of Example 1 of the present invention.

[0014] Figure 2 It is a schematic diagram of the three-dimensional structure of Example 1.

[0015] Figure 3 yes Figure 2 An enlarged structural diagram of the top part of the middle frame.

[0016] Figure 4 yes Figure 3 Schematic diagram of the enlarged structure of part A in FIG.

[0017] Figure 5 It is a schematic diagram of the three-dimensional structure of each group of tube bundles installed on the frame in Example 1.

[0018] Figure 6 yes Figure 5 Schematic diagram of the enlarged structure in the B direction (connection relationship diagram between the top of the tube bundle and the upper plate).

[0019] Figure 7 yes Figure 5 Schematic diagram of the enlarged structure of part C (connection diagram between the bottom end of the tube bundle and the junction box).

[0020] Figure 8 This is a diagram of the connection between the top of each tube bundle and the frame in an existing air cooler (the middle part of the tube bundle is omitted).

[0021] Fig. 9 yes Figure 8 Schematic diagram of the enlarged structure of part D in FIG.

[0022] Fig.10 yes Figure 8 Schematic diagram of the enlarged structure of part E in FIG. DETAILED DESCRIPTION

[0023] The following is a further description with reference to the embodiments shown in the accompanying drawings.

[0024] The A-type air cooler capable of releasing heat displacement shown in the attached drawings comprises a plurality of air cooling units; in each air cooling unit, a frame 8 is erected in an A shape and stands on a hardened foundation through a beam frame 1; a plurality of tube bundles 3 consisting of a plurality of finned tubes arranged in parallel to each other are laid from top to bottom on two inclined slopes of the A-shaped frame (it can be seen in the figure that four groups of tube bundles are laid on each inclined slope, and each group of tube bundles consists of 60-160 finned tubes; a plurality of horizontal beams 7 are also fixed on the frame to support the middle part of each group of tube bundles), a steam distribution pipe 5 is arranged at the top of the A-shaped frame, and two junction boxes 6 are respectively arranged at the bottom ends of the two inclined slopes; a fan drive system 2 is installed on a fan bridge in the center below the A-shaped frame and sprays cooling air in an upward direction to the tube bundle; the outer side of the air cooler is also surrounded by a windshield wall 4 to maintain the normal working environment of the air cooler.

[0025] The above structure is similar to the existing A-type air cooler.

[0026] The improvement of the present invention is that the top of each tube bundle is fixedly connected to the top of the frame through the steam distribution pipe, and the bottom of each tube bundle is fixedly connected to the frame through the junction box. As can be seen from the figure, each tube bundle is composed of a plurality of finned tubes; the tops of these finned tubes are respectively inserted and welded to the upper tube plate (the upper tube plate is connected to the steam distribution pipe as a whole by welding, and also serves as a side tube wall of the steam distribution pipe), and the edges of the upper tube plate are respectively fastened to the side beams of the frame by a plurality of screws 5-1 (see Figure 4 , Figure 6 ); The bottoms of these finned tubes are respectively inserted and welded to the lower tube sheet (the lower tube sheet is connected to the junction box as a whole by welding, and at the same time serves as one side of the tube wall of the junction box; it helps to improve the sealing performance of the tube bundle joint), and the edges of the lower tube sheet are also fastened to the side beams of the frame by bolts 6-1 (see Figure 5 , Figure 7 ).

[0027] Furthermore, the combiner box is padded between the bottom end of the frame and the beam 1 (i.e., the weight of the air cooler is supported by the combiner box), and the combiner box can move horizontally on the beam (the beam 1 is installed on a hardened foundation), so that after the tube bundle expands due to heat, the combiner box can be driven to automatically adjust the overall thermal displacement on the beam.

[0028] Furthermore, the outside of the combiner box is provided with a plurality of reinforcing rib plates 6-2; Figure 5 , Figure 7 It can be seen that: a number of reinforcing ribs are arranged on the two sides of the combiner box parallel to the inclined slope; a number of support rods 6-3 are arranged between the inner walls of the two sides of the combiner box, and the two ends of each support rod are welded and fixed on the inner walls on both sides (in order to show the support rod structure in the combiner box, one side of the cover plate of the combiner box is removed, forming a window 6-6 for easy observation); thereby, the strength and rigidity of the combiner box can be increased. An opening 6-5 is arranged at the lower end of the combiner box for connecting a water pipe so that the condensed water collected in the combiner box can be transported outward.

[0029] Furthermore, the entire bottom of the junction box is provided with a triangular column-shaped sliding frame 6-4, and a rib 6-41 of the triangular column rests on the beam frame to maintain a small sliding resistance.

[0030] Before the present invention leaves the factory, the two ends of the tube bundle are first welded and fixed to the upper tube plate and the lower tube plate respectively, and then the upper tube plate and the lower tube plate are fixed to the A-shaped frame by bolts; when transported to the site for installation, the steam distribution pipe and the upper tube plate are welded to form a closed steam distribution pipe, and the manifold and the lower tube plate are welded to form a closed manifold box.

Claims

1. An A-type air cooler capable of releasing heat displacement, comprising a plurality of air cooling units; each air cooling unit comprises a frame (8) erected in an A shape, a tube bundle (3) laid from top to bottom on two inclined slopes of the A-shaped frame and composed of a plurality of fin tubes arranged in parallel with each other, a steam distribution pipe (5) arranged at the top of the A-shaped frame and connected to the top of the tube bundle, a junction box (6) respectively arranged at the bottom of the two inclined slopes and connected to the bottom of the tube bundle, and a fan drive system (2) installed in the center below the A-shaped frame and spraying cooling air to the tube bundle; characterized in that: The two ends of the tube bundle are fixedly connected to the frame through a steam distribution box and a junction box respectively; the junction box is placed on the bottom end of the frame and is movably positioned on the platform surface of the beam frame (1) so that the horizontal thermal displacement can be automatically released by sliding after the tube bundle is heated; A plurality of support rods (6-3) are arranged between the inner walls of the two side surfaces of the combiner box, and the two ends of each support rod are respectively welded and fixed to the inner walls on both sides; thereby increasing the strength and rigidity of the combiner box; One side of the steam distribution pipe is fixedly connected to the top end of the frame by welding with fasteners, and one side of the junction box is fixedly connected to the bottom end of the frame by welding with fasteners.

2. The A-type air cooler capable of releasing heat displacement according to claim 1, characterized in that: The outside of the junction box is provided with a reinforcing rib plate (6-2) for increasing rigidity.

3. The A-type air cooler capable of releasing heat displacement according to claim 2, characterized in that: A triangular column-shaped sliding frame (6-4) is provided at the bottom of the junction box.

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