Anti-torsion device for tube bundle of fixed tube-sheet heat exchanger

Abstract

The utility model discloses a fixed tube sheet heat exchanger tube bundle anti-twisting device which comprises a tube opening fixedly arranged on a shell, the tube opening penetrates into the shell and is right opposite to a baffle plate serving as an anti-twisting base body, the arc end face of the anti-twisting base body faces the tube opening, and the central axis of the tube opening is located on the radial bisection face of the anti-twisting base body. The pipe orifice is coaxially connected with the connecting plate, an anti-twisting fixing block is fixedly arranged on the anti-twisting base body, and a fastening mechanism is arranged between the connecting plate and the anti-twisting fixing block, so that the anti-twisting base body is tightly connected with the pipe orifice. According to the utility model, the fastening connection between the anti-twisting base body and the shell is realized, and when the shell rotates, the anti-twisting base body ensures that the tube bundle rotates synchronously, so that the problem of distortion and deformation of the heat exchange tube caused by inconsistent rotating speeds of the tube bundle and the shell when the tube plate and the shell are welded can be effectively avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of fixed tube plate type heat exchangers, and particularly relates to a tube bundle anti-twisting device for a fixed tube plate type heat exchanger. Background Art

[0002] A fixed tube sheet heat exchanger is a shell and tube heat exchanger in which the tube sheets at both ends of the tube bundle are fixedly connected to the shell by welding. A tube bundle is arranged between the tube sheets at both ends, and a number of baffles are arranged between the tube sheets at both ends to increase the flow path of the shell-side fluid. It is widely used due to its compact structure, more tubes, large heat exchange area under the same diameter, and simple manufacturing.

[0003] When welding the tubesheet to the shell in a fixed-tubesheet heat exchanger, the welder remains stationary while the shell and its internal tubesheet rotate synchronously. As the tubesheet rotates, the tube bundle and baffles rotate with it. However, during the actual welding process, the baffles, tube bundle, and tubesheet may experience rotational mismatches, causing the tube bundle to distort. After welding the circumferential seam between the tubesheet and shell, personnel are unable to enter the shell, making repairs to the tube bundle impossible. Utility Model Content

[0004] In order to solve the problem of tube bundle torsion caused by rotating the tube sheet and the shell of a fixed tube sheet heat exchanger for circumferential seam welding, the utility model provides a tube bundle anti-twisting device for a fixed tube sheet heat exchanger.

[0005] A device for preventing twisting of a tube bundle of a fixed tube-sheet heat exchanger, comprising a tube orifice fixedly mounted on a shell, the tube orifice extending into the interior of the shell and facing a baffle serving as an anti-twist base, the arc end of the anti-twist base facing the tube orifice and the central axis of the tube orifice located on a radial bisector plane of the anti-twist base;

[0006] The pipe mouth is coaxially fixedly connected to the connecting plate, an anti-twist fixing block is fixedly arranged on the anti-twist base, a fastening mechanism is provided between the connecting plate and the anti-twist fixing block, and the fastening mechanism connects the connecting plate and the anti-twist fixing block into one.

[0007] Preferably, the connecting plate is provided with a plurality of sleeves extending downwardly along the axis of the pipe orifice, the connecting plate is provided with through holes aligned with the sleeves, and the anti-twist fixing block is provided with a plurality of threaded holes aligned one by one with the corresponding sleeves;

[0008] The fastening studs are arranged in the aligned sleeves and threaded holes.

[0009] Preferably, the fastening stud is a fully threaded hexagonal head stud.

[0010] Preferably, a notch is provided on the anti-twist base, and the anti-twist fixing block is welded to the notch.

[0011] Preferably, a flange is coaxially fixedly provided on the top end of the pipe opening, and the radial outer side wall of the connecting plate is fixedly connected to the inner side wall of the flange.

[0012] Preferably, the pipe mouth and the flange, and the flange and the connecting plate are both connected by welding.

[0013] Preferably, the top end of the flange is adapted to be connected to a flange end cover.

[0014] Preferably, two sleeves extending downward along the axis of the pipe orifice are provided on the connecting plate.

[0015] The beneficial effects of the utility model are:

[0016] (1) The utility model can realize a fastening connection between the anti-twist base and the pipe mouth, and further realize a fastening connection between the anti-twist base and the shell. When the shell rotates, the anti-twist base ensures that the tube bundle and the shell rotate synchronously, which can effectively avoid the problem of heat exchange tube distortion caused by inconsistent rotation speed of the tube bundle and the shell when the tube sheet and the shell are welded.

[0017] (2) After the device of the utility model realizes the fastening connection between the anti-twist base and the shell, the relative position relationship between the anti-twist base and the shell no longer changes, thereby limiting the relative position between the tube bundle and the shell. Therefore, it also plays a certain fixing role on the tube bundle, can reduce the influence of the tube bundle movement on the welding during the rotation process, and improve the welding quality between the tube sheet and the shell.

[0018] (3) Since the tube bundle is connected to each baffle in the heat exchanger, the fixing operation of the tube bundle by the device of the present invention will also be reflected on each baffle, that is, the relative position between each baffle and the shell is also limited, thereby reducing the occurrence of shell-side fluid leakage at the connection between the baffle and the shell, and improving the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings in the specification, which constitute a part of this application, are used to provide further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute improper limitations on this application.

[0020] Figure 1 This is a structural diagram of the utility model of the anti-twisting device for the tube bundle of a fixed tube sheet heat exchanger;

[0021] Figure 2 yes Figure 1 AA sectional view;

[0022] Figure 3 yes Figure 1 BB cross-sectional view;

[0023] Figure 4 This is a schematic diagram of the installation of the fixed tube sheet heat exchanger tube bundle anti-twisting device of the utility model on the fixed tube sheet heat exchanger;

[0024] in:

[0025] 1-shell, 2-pipe mouth, 3-anti-twist base, 4-connecting plate, 5-anti-twist fixing block, 6-sleeve, 7-threaded hole, 8-fastening stud, 9-flange, 10-flange end cover, 11-radial bisecting surface. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] like Figure 1-Figure 3 As shown, a fixed tube sheet heat exchanger tube bundle anti-twist device includes a tube nozzle 2 fixedly mounted on a shell 1. The tube nozzle 2 extends into the interior of the shell 1 and faces a baffle serving as an anti-twist base 3. The arc end of the anti-twist base 3 faces the tube nozzle 2, and the central axis of the tube nozzle 2 is located on a radial bisector 11 of the anti-twist base 3. The radial bisector 11 refers to a bisector passing through the center of the anti-twist base 3 and perpendicular to the anti-twist base 3. The anti-twist base 3 is farthest from the tube sheet at the tube end.

[0028] The pipe mouth 2 is coaxially fixedly connected to the connecting plate 4, an anti-twist fixing block 5 is fixedly provided on the anti-twist base 3, a fastening mechanism is provided between the connecting plate 4 and the anti-twist fixing block 5, and the fastening mechanism connects the connecting plate 4 and the anti-twist fixing block 5 into one.

[0029] Preferably, the connecting plate 4 is provided with a plurality of sleeves 6 extending downward along the axis of the pipe mouth 2, the connecting plate 4 is provided with through holes aligned with the sleeves 6, and the anti-twist fixing block 5 is provided with a plurality of threaded holes 7 aligned one by one with the corresponding sleeves 6;

[0030] The aligned sleeves 6 and threaded holes 7 are provided with fastening studs 8 .

[0031] Preferably, the fastening stud 8 is a fully threaded hexagonal head stud.

[0032] Preferably, a notch is provided on the anti-twist base 3, and the anti-twist fixing block 5 is welded to the notch.

[0033] Preferably, a flange 9 is coaxially fixedly provided on the top end of the pipe mouth 2 , and the radial outer side wall of the connecting plate 4 is fixedly connected to the inner side wall of the flange 9 .

[0034] Preferably, the pipe mouth 2 and the flange 9, and the flange 9 and the connecting plate 4 are both connected by welding.

[0035] Preferably, the top end of the flange 9 is adapted to be connected to the flange end cover 10 .

[0036] Preferably, two sleeves 6 extending downward along the axis of the pipe opening 2 are provided on the connecting plate 4 .

[0037] A device for preventing the tube bundle from twisting in a fixed tube sheet heat exchanger, the installation sequence of which is as follows:

[0038] First, select a suitable baffle as the anti-twist base 3. Among all the baffles, the anti-twist base 3 is the farthest from the threading end tube sheet. Then, a notch is opened on the anti-twist base 3 and an anti-twist fixing block 5 is welded.

[0039] A pipe opening 2 is provided on one side of the shell 1 facing the arc end of the anti-torsion base 3, and a flange 9 is welded to the end of the pipe opening 2;

[0040] Place sleeves 6 at the locations of the threaded holes 7 in the anti-rotation fixing block 5;

[0041] Weld the connecting plate 4 inside the flange 9 so that the connecting plate 4 rests against the sleeve 6;

[0042] The fastening stud 8 is passed through the through hole on the connecting plate 4 and inserted into the sleeve 6. The bottom of the fastening stud 8 is threadedly fastened to the threaded hole 7 on the anti-torsion fixing block 5.

[0043] The above has completed the fastening connection between the anti-twist base 3 and the pipe mouth 2. Figure 4 As shown, a tight connection between the anti-twist base 3 and the shell 1 is achieved. When the shell 1 rotates, the anti-twist base 3 ensures that the tube bundle and the shell 1 rotate synchronously, which can effectively avoid the problem of heat exchange tube distortion caused by inconsistent rotation speeds of the tube bundle and the shell 1 when the tube sheet and the shell 1 are welded.

[0044] After use, the flange end cover 10 is adapted to be connected to the flange 9, and the overall tooling structure is retained without affecting the use of the heat exchanger.

[0045] In addition, after the anti-twist base 3 and the shell 1 are fastened together by the device of the present application, the relative positional relationship between the anti-twist base 3 and the shell 1 no longer changes, thereby limiting the relative position between the tube bundle and the shell 1. This also plays a certain role in fixing the tube bundle, reducing the impact of the tube bundle's movement on the welding during rotation, and improving the welding quality between the tube sheet and the shell 1. Since the tube bundle is connected to the various baffles in the heat exchanger, the fixing operation of the device of the present application on the tube bundle is also reflected on the various baffles, that is, the relative position between each baffle and the shell 1 is also limited, thereby reducing the occurrence of shell-side fluid leakage at the connection between the baffle and the shell 1 and improving the heat exchange efficiency.

[0046] Although the above describes the specific implementation methods of the present invention in conjunction with the accompanying drawings, it is not a limitation of the present invention. Those skilled in the art should understand that on the basis of the technical solution of the present invention, various modifications or variations that can be made by those skilled in the art without creative work are still within the scope of protection of the present invention.

Claims

1. A device for preventing the tube bundle from twisting in a fixed tube sheet heat exchanger, characterized in that: The invention comprises a pipe mouth (2) fixedly arranged on a shell (1), wherein the pipe mouth (2) penetrates into the interior of the shell (1) and faces a baffle serving as an anti-twist base (3), wherein the arc end of the anti-twist base (3) faces the pipe mouth (2) and the central axis of the pipe mouth (2) is located on a radial bisecting plane of the anti-twist base (3); The pipe mouth (2) is coaxially fixedly connected to the connecting plate (4); an anti-twist fixing block (5) is fixedly provided on the anti-twist base (3); a fastening mechanism is provided between the connecting plate (4) and the anti-twist fixing block (5); and the fastening mechanism connects the connecting plate (4) and the anti-twist fixing block (5) into one body.

2. The anti-twisting device for tube bundle of fixed tube sheet heat exchanger according to claim 1, characterized in that: The connecting plate (4) is provided with a plurality of sleeves (6) extending downward along the axis of the pipe mouth (2), the connecting plate (4) is provided with through holes aligned with the sleeves (6), and the anti-twist fixing block (5) is provided with a plurality of threaded holes (7) aligned one by one with the corresponding sleeves (6); A fastening stud (8) is arranged in the aligned sleeves (6) and threaded holes (7).

3. The anti-twisting device for tube bundle of fixed tube sheet heat exchanger according to claim 2, characterized in that: The fastening stud (8) is a fully threaded hexagonal head stud.

4. The anti-twisting device for a fixed tube sheet heat exchanger tube bundle according to claim 1, characterized in that: A notch is provided on the anti-twist base (3), and the anti-twist fixing block (5) is welded to the notch.

5. The anti-twisting device for tube bundle of fixed tube sheet heat exchanger according to claim 1, characterized in that: A flange (9) is coaxially fixedly provided at the top end of the pipe mouth (2), and the radial outer side wall of the connecting plate (4) is fixedly connected to the inner side wall of the flange (9).

6. The anti-twisting device for a tube bundle of a fixed tube sheet heat exchanger according to claim 5, characterized in that: The pipe mouth (2) and the flange (9), as well as the flange (9) and the connecting plate (4) are welded together.

7. The anti-twisting device for a tube bundle of a fixed tube sheet heat exchanger according to claim 5, characterized in that: The top end of the flange (9) is adapted to be connected to the flange end cover (10).

8. The anti-twisting device for tube bundles of a fixed tube sheet heat exchanger according to any one of claims 2 to 7, characterized in that: Two sleeves (6) extending downward along the axis of the pipe opening (2) are provided on the connecting plate (4).

Images