Method for choosing expanded-connecting pressure of tube-side hydraulic expanded-connecting joint of shell-and-tube heat exchanger based on tube expanding rate
A shell-and-tube heat exchanger and tube expansion rate technology, which is applied in the field of hydraulic expansion joints, can solve the problems of how much expansion pressure is applied and does not specify the tube expansion rate, etc., achieves accurate results, facilitates the hydraulic expansion process, and ensures quality Effect
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Embodiment 1
[0025] The hydraulic expansion joint structure of the present invention can be found in figure 1 , where the specification of the heat exchange tubes in the shell and tube heat exchanger is Φ25×2.5mm, the heat exchange tubes are arranged in the form of equilateral triangles, the center distance between adjacent tube holes is 32mm, the material of the heat exchange tubes is 10#, and the material of the tube sheet is It is 16Mn. Through multiple sets of discrete experimental data, the expansion joint pressure required to achieve the corresponding expansion ratio is obtained respectively. For the discrete experimental data, see the attached figure 2 point in .
[0026] Assuming that the expansion rate in the technical requirements is 6% to 8%, according to the fitting formula (1), when H is 6%, the corresponding P can be calculated as 230MPa; when H is 8%, it can be calculated The corresponding P is 277MPa. Therefore, when the tube expansion rate range is 6% to 8% in the tech...
Embodiment 2
[0028] The hydraulic expansion joint structure of the present invention can be found in figure 1 , where the specification of the heat exchange tubes in the shell and tube heat exchanger is Φ25×2.5mm, the heat exchange tubes are arranged in the form of equilateral triangles, the center distance between adjacent tube holes is 32mm, and the heat exchange tubes and tube sheets are made of 304 stainless steel . Through multiple sets of discrete experimental data, the expansion joint pressure required to achieve the corresponding expansion ratio is obtained respectively. For the discrete experimental data, see the attached image 3 point in .
[0029] Assuming that the expansion rate in the technical requirements is 5% to 6%, according to the fitting formula (2), when H is 5%, the corresponding P can be calculated as 212MPa; when H is 6%, it can be calculated The corresponding P is 236MPa. Therefore, when the expansion rate range is 5% to 6% in the technical requirements, the exp...
Embodiment 3
[0031] The hydraulic expansion joint structure of the present invention can be found in figure 1 , where the specification of the heat exchange tube in the shell and tube heat exchanger is Φ25×2.5mm, the heat exchange tube is in the form of equilateral triangle tube arrangement, the center distance between adjacent tube holes is 32mm, and the material of the heat exchange tube and the tube sheet is 321 stainless steel . Through multiple sets of discrete experimental data, the expansion joint pressure required to achieve the corresponding expansion ratio is obtained respectively. For the discrete experimental data, see the attached Figure 4 point in .
[0032] Assuming that the expansion rate in the technical requirements is 4% to 8%, according to the fitting formula (3), when H is 4%, the corresponding P can be calculated as 201MPa; when H is 8%, it can be calculated The corresponding P is 285MPa. Therefore, when the expansion rate range is 4% to 8% in the technical requir...
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