Shell of shell and tube heat exchanger with nichrome medium tube stack

Abstract

The utility model provides a shell of a shell and tube heat exchanger with a nichrome medium tube set. The shell comprises a first shell plate, a second shell plate, a third shell plate and a fourth shell plate. The first shell plate, the second shell plate, the third shell plate and the fourth shell plate are enclosed and are connected through solder to form a shell; the cross sections of the first shell plate, the second shell plate, the third shell plate and the fourth shell plate are arranged in an arch shape. According to the utility model, the plurality of groups of shell plates made of metal materials are assembled to form the shell, so that the shell has higher loading capacity. The first end face and the third end face of the shell plate respectively extend towards the second end face, intersect with the second end face and are integrally arranged, so that the cross section of the shell plate made of metal materials is in an arch shape, and then the local geometric curvature is enhanced; at the moment, the shell plate with the arched cross section is beneficial to uniformly distributing pressure to different parts of the shell plate, so that stress concentration is reduced, and local deformation is prevented.

Description

TECHNICAL FIELD

[0001] The utility model belongs to heat exchanger preparation technical field, especially a kind of shell of shell-and-tube heat exchanger with nickel-chromium alloy medium pipe group. BACKGROUND

[0002] Heat exchanger is a kind of energy-saving equipment between two or more than two fluids of different temperatures, is to pass heat from fluid with higher temperature to fluid with lower temperature, so that fluid temperature meets the requirement of process condition.

[0003] Heat exchanger includes shell, tube group, baffle, liquid inlet cover and liquid outlet cover combined by multiple groups of tube plate. When assembling, baffle and shell are assembled by insertion. In order to facilitate assembly, a certain installation gap is needed between shell and baffle, so that the traditional shell and baffle need to use non-metal rectangular shell.

[0004] In actual application process, the rectangular shell of non-metal product has poor pressure-bearing capacity, which leads to problems such as stress concentration and thermal expansion deformation of shell. INVENTION CONTENTS

[0005] In view of the problems in the background art, the utility model provides a kind of shell of shell-and-tube heat exchanger with nickel-chromium alloy medium pipe group, comprising,

[0006] First shell plate;

[0007] Second shell plate closely attached to the first shell plate;

[0008] Third shell plate closely attached to the second shell plate;

[0009] Fourth shell plate closely attached to the third shell plate;

[0010] Contact end portion is arranged on the end face of the first shell plate, second shell plate, third shell plate and fourth shell plate;

[0011] Solder is arranged on the contact end portion,

[0012] The first shell plate, second shell plate, third shell plate and fourth shell plate are enclosed and connected by solder, and assembled to form shell;

[0013] The first shell plate, second shell plate, third shell plate and fourth shell plate are provided with second end face, and first end face and third end face are arranged on both sides of the second end face;

[0014] The first end face and the third end face extend towards the second end face respectively, intersect with the second end face, and are integrally arranged, so that the cross section is arranged in arc shape.

[0015] Optionally, the shell plate is made of metal.

[0016] Optionally, the first end surface and the second end surface are connected by a circular arc segment.

[0017] The third end surface and the second end surface are connected by a circular arc segment.

[0018] Optionally, the thickness of the first shell plate, the second shell plate, the third shell plate and the fourth shell plate is 2.2±0.05mm-6.02±0.05mm.

[0019] Optionally, at least one group of reinforcing ribs is arranged on the end surface of the first shell plate, the second shell plate, the third shell plate and the fourth shell plate, and the reinforcing ribs can be arranged along the length direction of the shell plate.

[0020] Optionally, the thickness of the reinforcing rib is 1.5±0.05mm, and the deformation amount of the reinforcing rib is ≤1mm when a certain instantaneous pressure is applied or thermal expansion deformation is received.

[0021] In summary, the beneficial effects of the present application are:

[0022] The present application is formed by assembling a plurality of shell plates made of metal materials to form a shell, which has higher pressure bearing capacity. The first end surface and the third end surface of the shell plate of the present application respectively extend towards the second end surface, intersect with the second end surface, and are integrally arranged, so that the shell plate made of metal materials is arranged in an arc shape in cross section, thereby enhancing the local geometric curvature. When the shell plate is subjected to thermal expansion or pressure, the shell plate arranged in an arc shape in cross section helps to uniformly distribute the pressure to different parts of the shell plate, reduces stress concentration, and prevents local deformation. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is an embodiment of the whole structure schematic diagram of the shell of the shell and tube heat exchanger with the nickel-chromium alloy medium pipe group of the present application;

[0024] Figure 2 It is an embodiment of the whole structure schematic diagram of the shell of the shell and tube heat exchanger with the nickel-chromium alloy medium pipe group of the present application;

[0025] Figure 3 It is an embodiment of the whole structure schematic diagram of the shell of the shell and tube heat exchanger with the nickel-chromium alloy medium pipe group of the present application;

[0026] Figure 4 It is a partial structure enlarged view of an embodiment of the shell of the shell and tube heat exchanger with the nickel-chromium alloy medium pipe group of the present application.

[0027] Reference signs:

[0028] 1, shell; 2, first shell plate; 3, second shell plate; 4, third shell plate; 5, contact end; 6, reinforcing rib; 7, first end face; 8, second end face; 9, third end face; 10, fourth shell plate; 11, baffle. DETAILED DESCRIPTION

[0029] The heat exchanger comprises a shell composed of multiple sets of tube plates, a tube set, a baffle, a liquid inlet cover and a liquid outlet cover. In assembly, the baffle is assembled with the shell in an insertion mode. In order to facilitate assembly, a certain installation gap is provided between the shell and the baffle, and thus the conventional shell and baffle are both rectangular shells made of non-metallic materials. In actual application, the rectangular shell made of non-metallic materials has poor pressure-bearing capacity, which leads to problems such as stress concentration and thermal expansion deformation of the shell. In order to solve the above technical problems, as shown in the drawings, the embodiment provides a shell 1 of a shell-and-tube heat exchanger with a nickel-chromium alloy medium tube set, which comprises a first shell plate 2, a second shell plate 3, a third shell plate 4 and a fourth shell plate 10, and the shell 1 is made of metal as a whole, preferably stainless steel. Figures 1-4

[0030] The first shell plate 2, the second shell plate 3, the third shell plate 4 and the fourth shell plate 10 are all provided with a contact end 5 on the end face, and the contact end 5 is provided with solder, and the first shell plate 2, the second shell plate 3, the third shell plate 4 and the fourth shell plate 10 are enclosed by the solder to assemble the shell 1.

[0031] Further, the shell shape can be quadrilateral or circular.

[0032] The first shell plate 2, the second shell plate 3, the third shell plate 4 and the fourth shell plate 10 are all provided with a second end face 8, and the first end face 7 and the third end face 9 are respectively arranged on the two sides of the second end face 8;

[0033] The first end face 7 and the third end face 9 respectively extend towards the second end face 8 and intersect with the second end face 8, and are integrally arranged, so that the cross section is arranged in an arc shape;

[0034] The first end face 7 extends towards the second end face 8 and intersects with the second end face 8 to form an included angle B1, 95°≤B1≤164.1°;

[0035] The third end face 9 extends towards the second end face and intersects with the second end face 8 to form an included angle B2, 95°≤B2≤164.1°;

[0036] The second end face 8 is arranged in an arc shape in cross section, and the tangent lines at the two ends of the second end face 8 continuously extend and intersect to form an included angle a, 115°≤a≤148°.

[0037] ​In the embodiment, those skilled in the art can understand that the conventional heat exchanger shell adopts a rectangular shell, and the shell will be deformed due to thermal expansion; and the first end face 7 and the third end face 9 of the shell plate extend towards the second end face 8, intersect with the second end face 8, and are integrally arranged, so that the cross section of the shell plate made of metal material is arranged in an arc shape, thereby enhancing the local geometric curvature, and when the shell plate is subjected to thermal expansion or pressure, the shell plate arranged in an arc shape can help to uniformly distribute the pressure to different parts of the shell plate,

[0038] Stress concentration is reduced, and local deformation is prevented.

[0039] Further, the first end face 7 and the second end face 8 are connected by a circular arc segment transition connection.

[0040] The third end face 9 and the second end face 8 are connected by a circular arc segment transition connection.

[0041] In the embodiment, when the four groups of shell plates are assembled into a shell, the contact end 5 of the end face of the first shell plate 2, the second shell plate 3, the third shell plate 4 and the fourth shell plate 10 is provided with solder, and the first shell plate 2, the second shell plate 3, the third shell plate 4 and the fourth shell plate 10 are enclosed by the solder to assemble the shell 1; then the high-temperature solder melting is carried out in the brazing furnace, so that the solder is slowly filled, and the connection between the four groups of shell plates is realized.

[0042] Further, the thickness of the first shell plate 2, the second shell plate 3, the third shell plate 4 and the fourth shell plate 10 is 2.2±0.05mm-6.02±0.05mm.

[0043] Further, at least one group of reinforcing ribs 6 is arranged on the end face of the first shell plate 2, the second shell plate 3, the third shell plate 4 and the fourth shell plate 10, and the reinforcing ribs 6 can be arranged along the length direction of the shell plate and can be asymmetrically and uniformly distributed.

[0044] Further, the thickness of the reinforcing rib 6 is 1.5±0.05mm, and when a certain instantaneous pressure is applied to the reinforcing rib 6 or the reinforcing rib 6 is subjected to thermal expansion deformation, the deformation amount of the reinforcing rib 6 is ≤1mm.

[0045] In the embodiment, the strength of the shell plate can be enhanced by the arrangement of the reinforcing rib, and the shell can have better anti-deformation ability when subjected to thermal expansion deformation or pressure.

[0046] Further, the baffle 11 arranged in the shell 1;

[0047] When in the unwelded state, a filler metal layer is arranged between the baffle plate 11 end face and the shell 1, and the filler metal layer is located on the contact point of the shell 1, when in the welded state (namely, the whole assembled heat exchanger is placed into brazing for welding), the filler metal layer makes the side end face of the baffle plate 11 closely adhere to the shell 1, and forms a sealed connection.

[0048] In the embodiment, the filler metal layer is added to make the baffle plate 11 closely adhere to the shell 1, and forms a sealed connection, and no gap is left during assembly; and the circulating medium is prevented from flowing out from the gap between the shell plate and the baffle plate.

[0049] In order to make the purpose, technical scheme and advantages of the utility model more clear, the utility model is further described in detail below by combining with the drawings and specific embodiments. Although the example embodiments are disclosed in the drawings, it should be understood that the utility model can be realized in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to facilitate a thorough understanding of the utility model and to convey the complete concept of the utility model to those skilled in the art.

[0050] In the description of the present specification, the description of the terms "some embodiments", "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or features of the embodiments or examples described in the present specification without contradiction.

[0051] In the present utility model, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance; the term "a plurality of" refers to two or more than two, unless otherwise explicitly limited. The terms "mounting", "connection", "connection", "fixing" and the like should be broadly understood, for example, "connection" can be fixed connection, or detachable connection, or integrally connected; "connected" can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present utility model can be understood according to the specific circumstances.

[0052] It should be pointed out finally that the above embodiments are only used to illustrate the technical solutions of the present application but are not restrictive. Although the present application is described in detail with reference to the embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A shell of a shell-and-tube heat exchanger having a nickel-chromium alloy medium tube assembly, characterized in that, include, First shell plate; A second shell plate that is in close contact with the first shell plate; A third shell plate that is in close contact with the second shell plate; A fourth shell plate that is in close contact with the third shell plate; The first shell plate, the second shell plate, the third shell plate and the fourth shell plate are all provided with contact ends on their end faces; Solder is provided on each of the contact ends. The first shell plate, the second shell plate, the third shell plate, and the fourth shell plate are assembled together by solder to form a shell. The first shell plate, the second shell plate, the third shell plate and the fourth shell plate are all provided with a second end face, and a first end face and a third end face are respectively provided on both sides of the second end face; The first end face and the third end face extend toward the second end face, intersect with the second end face, and are integrally formed, with their cross-sections arranged in an arc shape.

2. The shell of a shell-and-tube heat exchanger with a nickel-chromium alloy medium tube assembly according to claim 1, characterized in that, The shell is made of metal.

3. The shell of a shell-and-tube heat exchanger with a nickel-chromium alloy medium tube assembly according to claim 1, characterized in that, The connection between the first end face and the second end face is made by a circular arc transition. The connection between the third end face and the second end face is made by a circular arc transition.

4. The shell of a shell-and-tube heat exchanger with a nickel-chromium alloy medium tube assembly according to claim 1, characterized in that, The thickness of the first shell plate, the second shell plate, the third shell plate and the fourth shell plate is 2.2±0.05mm to 6.02±0.05mm.

5. The shell of a shell-and-tube heat exchanger with a nickel-chromium alloy medium tube assembly according to claim 1, characterized in that, At least one set of reinforcing ribs is provided on the end faces of the first shell plate, the second shell plate, the third shell plate and the fourth shell plate, and the reinforcing ribs can be arranged along the length direction of the shell plate.

6. The shell of a shell-and-tube heat exchanger with a nickel-chromium alloy medium tube assembly according to claim 5, characterized in that, The thickness of the reinforcing rib is 1.5 ± 0.05 mm.

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