CN207123209U - Fixed tube-sheet exchanger - Google Patents

Abstract

The utility model belongs to the technical field of chemical industry, and specifically relates to a fixed tube plate heat exchanger, which is characterized in that: fixed tube plate, baffle plate (14), butterfly-shaped head (1) and expansion joint are the main components, In the design, it is found that the baffle (14) has obvious defects in terms of force, and the structure has been improved to strengthen the supporting function. When the inner radius r of the corner of the butterfly-shaped head is small, hemming will occur in actual production For the rupture of the area, the utility model has improved the structure, enlarged the inner radius r of the transition arc corner, and improved this defect; the fixed tube plate has obvious defects in the force and welding, and the structure and the welding edge have been repaired. Design; the phenomenon of stress concentration will occur during the welding process of the expansion joint and the cylinder, which has been greatly improved in the design structure.

Description

Fixed Tube Sheet Heat Exchanger

technical field

The utility model relates to the technical field of structural manufacture of a heat exchanger, in particular to a fixed tube plate heat exchanger.

Background technique

Heat exchanger is one of the important process equipment in chemical industry, petroleum, power, metallurgy, transportation, national defense and other industrial sectors. It is mainly composed of shell, tube bundle, tube sheet, baffle plate and head. The main advantages of the fixed tube-sheet heat exchanger are simple and compact structure, can withstand high pressure, low cost, easy to clean the tube side, and easy to replace when the tube is damaged; in the fixed tube-sheet heat exchanger, due to the inlet and outlet of the two fluids When the temperature difference between the two fluids is large, the temperature difference stress will be generated in the shell wall and the tube wall, causing the deformation of the equipment, or even bending or cracking. Generally, when the temperature difference is greater than 50°C, it should be considered on the shell. Add a compensation ring or an expansion joint to eliminate the temperature difference stress and protect the heat exchanger.

In practice, it is found that the baffle plate 14 has obvious defects in terms of stress, and the structure has been improved to strengthen the supporting function. When the inner radius r of the corner of the butterfly head is small, the hemming area will be broken in actual production. The utility model improves the structure by enlarging the inner radius r of the transition arc corner to improve this defect.

The fixed tube sheet has obvious defects in stress and welding, and the structure and welding edges have been designed. The phenomenon of stress concentration will appear during the welding process of the expansion joint and the cylinder, which has been greatly improved in the design structure.

Contents of the invention

The purpose of the utility model is to overcome the deficiencies of the prior art. The technical solution adopted by the utility model is to provide a fixed tube-sheet heat exchanger. U-shaped expansion joint.

The technical solution adopted by the utility model for solving the technical problems is: the fixed tube-sheet heat exchanger is composed of 1, head, 2, nameplate, 3, nameplate saddle, 4, screw, 5, connecting pipe, 6, Flange PNO.6DN200RF, 7. Flange PN1.0DN700RF, 8. Front tube plate, 9. Bolt M20, 10, Nut M20, 11, Gasket M20, 12, Distance tube, 13, Pull rod, 14, Baffle Plate, 15, heat exchange tube, 16, nut M16, 17, connecting pipe, 18, flange PN1.ODN50RE, 19, rear tube plate, 20, gasket, 21, lifting lug, 22, head DN700, 23, connecting pipe , 24. Flange PN1.0DN300RF, 25. Cylinder, 26. Support, 27. Drainage pipe, 28. Anti-shock plate, 29. Tube arrangement, 30. Cross support structure, 31. Outlet pipe port, 32 , water inlet pipe mouth, 33, head bottom plate, 34, enlarged hemming radius, 35, cross bracket structure, 36, I-shaped structure, 37, cylinder outer wall, 38, lengthened and widened welding surface, 39, nozzle, 40. Medium flow direction, 41. Welding seam, 42. Welding master piece, 43. Welding part of the inner partition of the head, 44. Partition plate, 45. Fixed tube plate and 46. Composed of the welded part of the tubes.

The fixed tube-sheet heat exchanger is characterized in that it adopts a stable cross bracket structure 35, locally enlarged flanging radius 34, lengthened and widened welding surface 38, fixed tube sheet 45, baffle plate 14, and head 1 And the structure of the expansion joint is used to improve the performance of the heat exchanger.

The fixed tube-sheet heat exchanger is characterized in that: the baffle plate 14 is the main component in the shell side, and its function is mainly to increase the fluid flow rate between the tubes, improve the heat transfer effect, and at the same time support the tube bundle, prevent the tube bundle from vibrating and The bending of the pipe will cause the bending and deformation of the baffle 14 due to its own gravity, and the baffle 14 is connected by a middle reinforced support structure.

The fixed tube sheet heat exchanger is characterized in that the fixed tube sheet 45 is used to arrange the heat exchange tubes and to separate the space between the tube side and the shell side. The thin tube sheet has the advantage of saving materials, and is suitable for medium and low pressure large-diameter heat exchangers. The front tube sheet 8 and the rear tube sheet 19 are welded together with the shell of the heat exchanger, and the middle of the tube sheet is not all drilled. A cross structure 35 and tube arrangement 29 are left inside the tube sheet to change the stress situation. In order to improve the welding problem of the tube sheet, an I-shaped structure 36 is used on the edge of the tube sheet to expand the welding area.

The fixed tube-sheet heat exchanger is characterized in that: the structural design of the baffle 14, the baffle 14 is the main component in the shell side, and the commonly used form of the baffle 14 is bow-shaped, and the dead zone in the flow is smaller The structure is relatively simple, and the single baffle 14 is composed of multiple groups.

The fixed tube-sheet heat exchanger is characterized in that: the head 1 can be integrally forged and formed by stamping a steel plate, and the butterfly-shaped head 1 has an optimized hemming radius structure, which enlarges the hemming radius. The larger circle is connected to the ellipse.

The fixed tube-sheet heat exchanger is characterized in that the expansion joint is a flexible member installed on the fixed tube-sheet heat exchanger, which compensates for the deformation difference between the tube bundle and the shell, and eliminates the gap between the shell and the tube bundle. Temperature stress caused by temperature difference. However, the general U-shaped expansion joint will have stress concentration during the welding process with the cylinder. In order to improve this phenomenon, the U-shaped expansion joint is designed in the utility model. Its characteristic is to lengthen the welding length on both sides, widen the The contact area on both sides is reduced, which will greatly improve the phenomenon of stress concentration.

The utility model has the following beneficial effects: the use of the baffles 14 can greatly improve the supporting effect on the pipes and improve the heat exchange efficiency. The use of fixed tube sheets can not only improve the support for the tubes, but also improve the welding stability. The use of U-shaped expansion joints can greatly improve the phenomenon of stress concentration. The design of the head can reduce the bending stress and hoop stress generated at the radius of the flange, and reduce the occurrence of accidents.

Description of drawings

Figure 1 is a schematic diagram of the three-dimensional structure of the fixed tube-sheet heat exchanger of the present invention.

Fig. 2 is a schematic structural diagram of the bow-shaped baffle of the present invention.

Fig. 3 is a schematic diagram of the head structure of the utility model.

Fig. 4 is a schematic diagram of the fixed tube plate structure of the utility model.

Fig. 5 is a structural schematic diagram of the expansion joint of the utility model.

Fig. 6 is a structural schematic diagram of the welding method of the utility model.

Fig. 7 is a structural schematic diagram of the welding method of the utility model.

Fig. 8 is a structural schematic diagram of the welding method of the utility model.

In the figure: 1. Head, 2. Nameplate, 3. Nameplate saddle, 4. Screw, 5. Connector, 6. Flange PNO.6DN200RF, 7. Flange PN1.0DN700RF, 8. Front tube plate, 9. Bolt M20, 10, Nut M20, 11, Gasket M20, 12, Distance tube, 13, Tie rod, 14, Baffle plate 14, 15, Heat exchange tube, 16, Nut M16, 17, Connector, 18, Flange PN1.ODN50RE, 19, rear tube plate, 20, gasket, 21, lifting lug, 22, head DN700, 23, connecting pipe, 24, flange PN1.0DN300RF, 25, cylinder, 26, support, 27, Drain pipe, 28, anti-shock plate, 29, tube arrangement, 30, cross support structure, 31, water outlet pipe mouth, 32, water inlet pipe mouth, 33, head bottom plate, 34, enlarged edge folding radius, 35, cross Cross support structure, 36. I-shaped structure, 37. Outer wall of the cylinder, 38. Lengthened and widened welding surface, 39. Nozzle, 40. Medium flow direction, 41. Weld seam, 42. Welding master piece, 43. Inside the head Partition plate welding place, 44, partition plate, 45, fixed tube plate, 46, row tube welding place.

Detailed ways

In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the accompanying drawings that need to be used in the description of the embodiments or the prior art will be briefly introduced below. Any modifications, equivalent replacements, improvements, etc. made within the scope of the present utility model shall be included in the protection scope of the present utility model.

The principles and features of the present utility model are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the utility model, and are not used to limit the scope of the utility model.

As shown in Figure 1, Figure 2, and Figure 3, the fixed tube-sheet heat exchanger is characterized by: high heat exchange efficiency, stable support structure, and the main structure of the heat exchanger can be displayed through partial enlargement. It mainly involves the fixed tube sheet 45, baffle 14, butterfly head 1, and expansion joint. During the design, it was found that the baffle 14 had obvious defects in the force, and the structure was improved to strengthen the supporting function. .

When the inner radius r of the corner of the butterfly-shaped head is small, cracks in the hemming area will occur in actual production. The utility model improves the structure and expands the inner radius r of the transition arc corner to improve this defect. The fixed tube sheet has obvious defects in stress and welding. The structure and welding edges have been designed. Stress concentration will occur during the welding process of the expansion joint and the cylinder. This phenomenon has been improved in the design structure.

The fixed tube sheet heat exchanger is characterized in that the fixed tube sheet 45 is used to arrange the heat exchange tubes and to separate the space between the tube side and the shell side. The thin tube sheet has the advantage of saving materials, and is suitable for medium and low pressure large-diameter heat exchangers. The front tube sheet 8 and the rear tube sheet 19 are welded together with the shell of the heat exchanger, and the middle of the tube sheet is not all drilled. A cross structure 35 and tube arrangement 29 are left inside the tube sheet to change the stress situation. In order to improve the welding problem of the tube sheet, an I-shaped structure 36 is used on the edge of the tube sheet to expand the welding area.

The fixed tube-sheet heat exchanger is characterized in that the expansion joint is a flexible member installed on the fixed tube-sheet heat exchanger, which compensates for the deformation difference between the tube bundle and the shell, and eliminates the gap between the shell and the tube bundle. Temperature stress caused by temperature difference. However, the general U-shaped expansion joint will have stress concentration during the welding process with the cylinder. In order to improve this phenomenon, the U-shaped expansion joint is designed in the utility model. Its characteristic is to lengthen the welding length on both sides, widen the The contact area on both sides is reduced, which will greatly improve the phenomenon of stress concentration.

The fixed tube-sheet heat exchanger is characterized in that: the structural design of the baffle 14, the baffle 14 is the main component in the shell side, and its function is mainly to increase the fluid flow rate between the tubes, improve the heat transfer effect, and Guide the fluid to flow laterally through the tube bundle, increase the fluid velocity and enhance heat transfer; at the same time, it plays the role of supporting the tube bundle, preventing the vibration of the tube bundle and the bending of the tube. The commonly used form of the baffle 14 is arcuate, with less dead space in the flow and a relatively simple structure, and the single baffle 14 is used most.

The fixed tube-sheet heat exchanger is characterized in that: a lot of tubes are arranged in the shell side of the heat exchanger, as the number of tubes increases, the supporting force of the arcuate baffles is also increasing, and at the same time , as the flow rate of the medium increases, the resistance of the bow-shaped baffle will also increase, which will lead to the bending deformation of the baffle 14. In order to prevent this from happening, the design and modification of the baffle 14 are carried out. Usually the baffles 14 are all drilled. In the utility model, the design of the baffles 14 adopts a middle reinforced support structure. The use of this baffle 14 not only has the advantages of the traditional baffles 14, but also makes up for the disadvantages of the baffles 14. Disadvantages of easy deformation.

Claims (5)

1. A kind of 1. fixed tube-sheet exchanger, it is characterised in that：Using stable right-angled intersection supporting structure（35）, local wide Flanging radius（34）, lengthening broadening solder side（38）, fixed tube sheet（45）, deflection plate（14）, end socket（1）With the knot of expansion joint Structure, for improving the performance of heat exchanger.
2. 2. fixed tube-sheet exchanger according to claim 1, it is characterised in that：Deflection plate（14）It is main in shell side Element, its act on mainly increase pipe between rate of flow of fluid, improve heat-transfer effect, while rise support tube bank, prevent tube bundle vibration and The effect of tube bending, because self gravitation effect can cause deflection plate（14）Flexural deformation, deflection plate（14）Use in Between strengthen support structure connection.
3. 3. fixed tube-sheet exchanger according to claim 1, it is characterised in that：Fixed tube sheet（45）It is to be changed for arranging Heat pipe simultaneously play a part of separate tube side, shell side space, thin tubesheet have save material the advantages of, in being applied to, low pressure it is straight greatly In the heat exchanger in footpath, front tube sheet（8）And back tube sheet（19）Together with the case weld of heat exchanger, do not bored all among tube sheet Hole, right-angled intersection supporting structure is left inside tube sheet（35）Arranged with tubulation（29）, change stressing conditions, to improve tube sheet Welding Problems, tube sheet edge use work shape structure（36）, expand the area of welding.
4. 4. fixed tube-sheet exchanger according to claim 1, it is characterised in that：Deflection plate（14）Structure design, folding Flowing plate（14）It is the main element in shell side, deflection plate（14）Conventional form is arch, and dead band is less in flowing, structure ratio It is relatively simple, single deflection plate（14）It is made up of multigroup.
5. 5. fixed tube-sheet exchanger according to claim 1, it is characterised in that：End socket（1）It is solid forging shaping, steel Plate punch forming, the end socket of butterfly-type（1）Flanging radius structure optimizes, and expands the radius of flanging.