Improved heat exchanger structure

Abstract

The utility model relates to an improved heat exchanger structure which comprises a tube box and a shell, the tube box and the shell are connected through a sealing assembly composed of a tube plate and a flange, one side of the tube plate is fixedly connected to the tube box, and one side of the flange is connected to the shell. The heat exchanger structure further comprises a partition plate connected to the tube plate. The heat exchanger of the tube box structure integrated with the tube plate is designed, a traditional sealing structure mode of a gasket structure is omitted, an integrated sealing structure mode is used, in addition, the tube box and the tube plate are connected in a welding mode, and the tube plate and the partition plate are connected in a welding mode. In this way, the micro leakage phenomenon caused by deformation of the sealing face due to the temperature difference is effectively avoided, meanwhile, the problems of gasket aging caused by the long-term temperature difference and unreasonable pre-tightening and thermal expansion and cold contraction caused by the overlarge temperature gradient are solved, and the problem of medium leakage caused when equipment is in the normalized on-off state after operation is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat exchanger technical field especially relates to an improved heat exchanger structure. BACKGROUND

[0002] Heat exchanger is a kind of energy-saving equipment for realizing heat transfer between two or more fluids at different temperatures.For the structure of tube sheet and tube box in heat exchanger, there are many kinds, from the design point of view, through strength calculation, structure selection, as long as the heat exchange effect is met, each selection can be selected for design.

[0003] The structure of traditional tube bundle and tube sheet and the structure of tube box made in one body with fixed tube sheet all conform to the structure of tube sheet heat exchanger.The structure of tube bundle and tube sheet is qualified in sealing strength pressure test under normal temperature working pressure and working temperature, but if it is set in the state of too large temperature gradient during operation, thermal expansion and cold shrinkage can cause bolt pre-tightening failure, and leakage phenomenon occurs on sealing surface, which leads to medium leakage problem during equipment operation and even causes equipment failure.Even if the bolt is pre-tightened again, medium leakage phenomenon will occur again when starting for the second time after one qualified use. SUMMARY

[0004] In view of the shortcomings of the prior art, the purpose of the utility model is to provide an improved heat exchanger structure to solve one or more problems in the prior art.

[0005] To achieve the above purpose, the technical scheme of the utility model is as follows:

[0006] An improved heat exchanger structure, comprising a tube box and a shell, the tube box and the shell are connected through a sealing assembly composed of a tube sheet and a flange;The heat exchanger structure further comprises a partition plate connected to the tube sheet.

[0007] Further, one side of the tube sheet is fixed to the tube box, and the end face of the tube sheet is larger than the end face of the tube box.

[0008] Further, one side of the flange is connected to the shell, and the end face of the flange is larger than the end face of the shell.

[0009] Further, the end face part of the tube sheet larger than the tube box is matched with the end face part of the flange larger than the shell.

[0010] Further, the partition plate is arranged in the tube box, and the partition plate is further connected to the inner wall of the tube box.

[0011] Further, the tube box comprises a first part and a second part, and the first part and the second part are separated by the partition plate.

[0012] Further, the first part is connected with an inlet, and the second part is connected with an outlet.

[0013] Further, the heat exchanger structure further comprises a heat transfer pipe, which is arranged in the shell; one end of the heat transfer pipe is communicated with the first part, and the other end of the heat transfer pipe is communicated with the second part.

[0014] Compared with the prior art, the heat exchanger structure has the beneficial technical effects as follows:

[0015] The heat exchanger with the tube box structure integrally formed with the tube plate cancels the traditional sealing structure form using a gasket and uses an integrated sealing structure form, and the connection between the tube box and the tube plate and the connection between the tube plate and the partition plate are both in the form of welding, so that the micro-leakage phenomenon caused by the deformation of the sealing surface due to the temperature difference is effectively avoided, and the problems of gasket aging caused by long-term temperature difference and unreasonable pre-tightening and thermal expansion and contraction caused by excessive temperature gradient are also avoided, and the medium leakage problem caused by the on-off state of the equipment in the normal state after operation is solved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The structure of the improved heat exchanger structure is shown.

[0017] Figure 2 The local structure of the tube box and the shell connection part of the improved heat exchanger structure is shown.

[0018] Markings in the drawings: 1, tube box; 101, first part; 102, second part; 2, shell; 3, sealing assembly; 301, tube plate; 302, flange; 4, partition plate; 5, inlet; 6, outlet; 7, heat transfer pipe. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention more clear, the following is a further detailed description of an improved heat exchanger structure proposed by the present invention in conjunction with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the present invention will be more clear. It should be noted that the drawings are in a very simplified form and all use non-precise proportions. The terms "center", "lateral", "length", "width", "height", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "side" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, and do not indicate or imply that the improved heat exchanger structure or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation of the present invention, but is only used to conveniently and clearly assist in explaining the purpose of the embodiment of the present invention. In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, please refer to the accompanying drawings.

[0020] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them. They are not used to limit the conditions for the implementation of this utility model and therefore have no substantive technical significance. Any structural modifications, changes in proportional relationships, or adjustments in size should still fall within the scope of the technical contents disclosed in this utility model without affecting the effects and purposes that can be achieved by this utility model.

[0021] The specific structure of an improved heat exchanger structure is described below:

[0022] See also Figure 1 and Figure 2 The improved heat exchanger structure of this embodiment includes a tube box 1 and a shell 2 , and the tube box 1 and the shell 2 are connected via a sealing assembly 3 consisting of a tube sheet 301 and a flange 302 .

[0023] Furthermore, one side of the tube sheet 301 is fixedly connected to the pipe box 1, and the end surface of the tube sheet 301 is larger than the end surface of the pipe box 1. In this embodiment, the contact ends of the tube sheet 301 and the pipe box 1 are welded, thus forming an integrated structure of the pipe box 1 and the tube sheet 301. This effectively avoids thermal expansion and contraction caused by the large temperature difference of the medium entering the pipe box 1, and prevents medium leakage. One side of the flange 302 is connected to the shell 2, and the end surface of the flange 302 is larger than the end surface of the shell 2.

[0024] Further, the tube plate 301 is larger than the end surface portion of the tube box 1 and is fitted to the flange 302 which is larger than the end surface portion of the shell 2. Preferably, in the present embodiment, the tube plate 301 and the flange 302 are connected by bolts to facilitate disassembly of the internal structure of the heat exchanger for maintenance and replacement.

[0025] Further, the heat exchanger structure further comprises a partition plate 4 connected to the tube plate 301, the partition plate 4 is arranged in the tube box 1, and the partition plate 4 is also connected to the inner wall of the tube box 1. The tube box 1 comprises a first portion 101 and a second portion 102, and the first portion 101 and the second portion 102 are separated by the partition plate 4. Preferably, the partition plate 4 is connected to the tube plate 301 and the inner wall of the tube box 1 by welding, which effectively avoids leakage between the first portion 101 and the second portion 102 due to excessive temperature difference of the medium in the tube box 1.

[0026] Further, the inlet 5 is connected to the first portion 101, and the outlet 6 is connected to the second portion 102, and the heat exchanger structure further comprises a heat transfer pipe 7, the heat transfer pipe 7 is arranged in the shell 2, one end of the heat transfer pipe 7 is communicated with the first portion 101, and the other end of the heat transfer pipe 7 is communicated with the second portion 102, thereby forming a loop through the first portion 101, the heat transfer pipe 7 and the second portion 102 to realize heat exchange.

[0027] The technical features of the above-mentioned embodiments can be combined in any way. In order to make the description simple, all possible combinations of the technical features in the above-mentioned embodiments are not described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application. The above-mentioned embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. An improved heat exchanger structure, comprising a tube box and a shell, characterized in that: The tube box and the shell are connected via a sealing assembly consisting of a tube sheet and a flange; the heat exchanger structure also includes a partition plate connected to the tube sheet; one side of the tube sheet is fixed to the tube box, and the end face of the tube sheet is larger than the end face of the tube box; one side of the flange is connected to the shell, and the end face of the flange is larger than the end face of the shell; the end face portion of the tube sheet that is larger than the tube box is matched with the end face portion of the flange that is larger than the shell; the partition plate is arranged in the tube box, and the partition plate is also connected to the inner wall of the tube box.

2. The improved heat exchanger structure according to claim 1, characterized in that: The pipe box includes a first portion and a second portion, and the first portion and the second portion are partitioned by the partition plate.

3. The improved heat exchanger structure according to claim 2, characterized in that: An inlet is connected to the first portion, and an outlet is connected to the second portion.

4. The improved heat exchanger structure according to claim 3, characterized in that: The heat exchanger structure further includes a heat transfer tube, which is disposed in the shell; one end of the heat transfer tube is connected to the first part, and the other end of the heat transfer tube is connected to the second part.

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