Sandwich type tube plate of tube type heat exchanger

Abstract

The utility model provides an interlayer type tube plate of a tube type heat exchanger, which comprises an inner layer plate and an outer layer plate which are attached together, a plurality of tube opening mounting holes are formed in the inner layer plate and the outer layer plate in a penetrating mode, and first annular steps are arranged at the outer ends of the tube opening mounting holes of the inner layer plate. A second annular step is arranged at the inner end of a pipe opening installation hole of the outer layer plate, the first annular step and the second annular step are buckled to form a clamping channel, and the clamping channel is used for clamping a protruding ring installed on the outer wall of a heat exchange pipe. The sandwich type tube plate of the tube type heat exchanger has the advantages of being capable of solving the problem that welding joints are prone to cracking, and easy to install and produce.

Description

TECHNICAL FIELD

[0001] The utility model relates to a shell and tube heat exchanger, specifically, a kind of shell and tube heat exchanger sandwich type tube sheet. BACKGROUND

[0002] Shell and tube heat exchanger is the most widely used heat exchanger in chemical industry and alcohol production, mainly by shell, tube sheet, heat exchange tube, end cover, baffle plate etc., wherein, tube sheet is installed at the both ends of shell, end cover is blocked at the outer side of tube sheet, the both ends of heat exchange tube are installed on tube sheet, baffle plate is supported in the middle of heat exchange tube, and it plays the role of guiding shell fluid flow.

[0003] When exchanging heat, tube fluid enters by the inlet of end cover, flows in heat exchange tube, and flows out from the outlet of another end of end cover, and another fluid enters by the inlet of shell, and flows out from the outlet of shell, and shell fluid and tube fluid complete heat exchange through the wall of heat exchange tube.When shell fluid enters heat exchange tube, due to the reasons such as cross-section change and flow change, heat exchange tube is prone to vibrate, and the end of traditional heat exchange tube is welded on tube sheet, and long-term vibration can cause cracking at welding position, and then leakage occurs.

[0004] The patent with application number 201921786337.4 discloses a trumpet type inlet threaded connection heat exchange tube structure, which is connected with threaded short pipe at the end of heat exchange tube, a part of vibration force is borne through threaded connection part, vibration effect between threaded short pipe and sealing plate is reduced, so that the connection position is not easy to crack;But the welding precision of threaded short pipe and sealing plate is required to be high in this structure, and welding deformation or the deviation of welding position and direction can cause installation difficulty of heat exchange tube and stress increase, which leads to the reduction of product yield and the increase of production cost.

[0005] In order to solve the above problems, people have been seeking an ideal technical solution. SUMMARY

[0006] The utility model aims at the deficiency of prior art, and provides a kind of shell and tube heat exchanger sandwich type tube sheet that can solve the problem of cracking at welding connection position, and is easy to install and produce.

[0007] In order to achieve the above purpose, the utility model adopts the technical scheme that a kind of shell and tube heat exchanger sandwich type tube sheet, including the inner layer plate and outer layer plate that are attached together, a plurality of pipe mouth installation holes are perforated on the inner layer plate and the outer layer plate, the first annular step is provided at the outer end of the pipe mouth installation hole of the inner layer plate, the second annular step is provided at the inner end of the pipe mouth installation hole of the outer layer plate, the first annular step and the second annular step are clamped to form clamping channel, and the clamping channel is used to clamp the convex ring on the outer wall of heat exchange tube.

[0008] Based on the above, the pipe orifice mounting hole of the outer layer plate is formed on a cap, and an outer thread is arranged on the outer wall of the cap.

[0009] Based on the above, the outer end of the cap is provided with a pressing plate, and the pressing plate covers the outer end of the inner thread hole.

[0010] Based on the above, the first annular step is provided with an elastic sealing gasket.

[0011] Based on the above, the shell of the shell-and-tube heat exchanger is cylindrical, a limiting ring is arranged on the inner wall of the end of the cylindrical shell, and a flange plate is arranged on the outer wall of the end of the cylindrical shell; the inner layer plate is pressed on the outer side of the limiting ring, the outer side surface of the inner layer plate is flush with the end surface of the cylindrical shell, and the edge of the outer layer plate is connected with the flange plate through bolts.

[0012] Compared with the prior art, the utility model has substantial features and progress, specifically, the utility model splits the traditional tube plate into the inner layer plate and the outer layer plate, and forms the clamping channel between the two, which needs to be matched with the heat exchange pipe provided with the convex ring on the outer wall, after the inner layer plate and the outer layer plate are buckled, the clamping channel presses the convex ring, the installation of the heat exchange pipe is completed, and the traditional welding installation mode is cancelled, so that the heat exchange pipe will not crack due to vibration.

[0013] Further, the single heat exchange pipe can be disassembled without disassembling the outer layer plate through the disassembly of the cap, so that the later maintenance is facilitated; the pressing plate covers the outer end of the inner thread hole, and can block the heat exchange medium from penetrating into the threaded connection; the elastic sealing gasket plays a sealing role on one hand, and can absorb part of the vibration of the heat exchange pipe on the other hand, so that the service life is further prolonged; the limiting ring is arranged on the inner wall of the end of the cylindrical shell, the inner layer plate is pressed, the flange plate is arranged on the outer wall of the end of the cylindrical shell, the connection of the outer layer plate is facilitated, and after the outer layer plate is installed, the inner layer plate and the heat exchange pipe are also pressed at the same time, so that the installation is very convenient. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is the cross-sectional structure schematic view of the sandwich type tube plate of the shell-and-tube heat exchanger in the utility model.

[0015] Fig. 2 It is the outer side surface structure schematic view of the sandwich type tube plate of the shell-and-tube heat exchanger in the utility model.

[0016] Fig. 3 It is the installation structure schematic view of the sandwich type tube plate of the shell-and-tube heat exchanger in the utility model.

[0017] In the diagram: 1. Inner plate; 2. Outer plate; 3. Pipe mounting hole; 4. First annular step; 5. Second annular step; 6. Clamping channel; 7. Limiting ring; 8. Flange; 9. Cap; 10. Internal threaded hole; 11. Pressure plate; 12. Elastic sealing gasket; 13. Cylindrical shell. Detailed Implementation

[0018] The technical solution of this utility model will be further described in detail below through specific embodiments.

[0019] like Figs. 1-3 As shown, a shell-and-tube heat exchanger jacketed tube sheet includes an inner plate 1 and an outer plate 2 attached together. The inner plate 1 and the outer plate 2 are provided with a plurality of tube mounting holes 3. The outer end of the tube mounting hole 3 of the inner plate 2 is provided with a first annular step 4, and the inner end of the tube mounting hole 3 of the outer plate 2 is provided with a second annular step 5. The first annular step 4 and the second annular step 5 are engaged to form a clamping channel 6.

[0020] To facilitate later maintenance, the pipe mounting holes 3 of the outer plate 2 are all opened on a cap 9. The outer wall of the cap 9 is provided with external threads, and the outer plate 2 is provided with an internal thread hole 10 corresponding to the cap 9. In this way, the individual heat exchange tubes can be disassembled and assembled simply by removing the cap 9. A pressure plate 11 is provided at the outer end of the cap 9. The pressure plate 11 covers the outer end of the internal thread hole 10 to prevent the heat exchange medium from extending into the threaded connection.

[0021] To further reduce the vibration of the heat exchange tube caused by the heat exchange medium, an elastic sealing gasket 12 is laid on the first annular step 4, which also serves as a seal.

[0022] For ease of installation, the matching shell and tube heat exchanger includes a cylindrical shell 13, with a limiting ring 7 provided on the inner wall of the end of the cylindrical shell 13 and a flange 8 provided on the outer wall of the end of the cylindrical shell 13; the inner plate 1 is pressed on the outside of the limiting ring 14, and the outer side of the inner plate 1 is flush with the end face of the cylindrical shell 13; the edge of the outer plate 2 is connected to the flange 8 by bolts.

[0023] Working principle:

[0024] The convex ring is installed (specifically, threaded) on the outer wall of the end of the heat exchange pipe; first, the inner layer plate 1 is laid and pressed outside the limiting ring 7, so that the outer side surface of the inner layer plate 1 is flush with the end surface of the cylindrical shell 13, the heat exchange pipe is installed through the pipe opening hole 3, the convex ring is placed on the first annular step 4, then the outer layer plate 2 is covered outside the inner layer plate 1, and the outer layer plate 2 is connected with the flange plate 8 through bolts, the first annular step 4 and the second annular step 5 are buckled to form the clamping channel 6, and the convex ring is clamped; when the heat exchange medium enters the heat exchange pipe to cause vibration, the elastic sealing gasket 12 and the threaded connection at each position can absorb the vibration, there is no problem of welding seam cracking, thereby prolonging the service life.

[0025] It should be finally pointed out that: the above embodiments are only used to illustrate the technical solutions of the present application and not to limit them; although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the specific embodiments of the present application can still be modified or some technical features can be replaced by equivalent ones; without departing from the spirit of the technical solutions of the present application, they should all be covered in the technical solution range of the present application claimed.

Claims

1. A jacketed tube sheet for a shell-and-tube heat exchanger, characterized in that: The device includes an inner plate and an outer plate that are attached together. The inner plate and the outer plate have a plurality of pipe mounting holes. The outer end of the pipe mounting hole of the inner plate is provided with a first annular step, and the inner end of the pipe mounting hole of the outer plate is provided with a second annular step. The first annular step and the second annular step are engaged to form a clamping channel, which is used to clamp a convex ring installed on the outer wall of the heat exchange tube.

2. The jacketed tube sheet for a shell-and-tube heat exchanger according to claim 1, characterized in that: The pipe mounting holes of the outer layer plate are all opened on a cap, the outer wall of the cap is provided with external threads, and the outer layer plate is provided with internal threaded holes corresponding to the cap.

3. The jacketed tube sheet for a shell-and-tube heat exchanger according to claim 2, characterized in that: A pressure plate is provided at the outer end of the cap, and the pressure plate covers the outer end of the internal threaded hole.

4. The jacketed tube sheet for a shell-and-tube heat exchanger according to any one of claims 1-3, characterized in that: An elastic sealing gasket is laid on the first annular step.

5. The jacketed tube sheet for a shell-and-tube heat exchanger according to claim 4, characterized in that: The shell-and-tube heat exchanger includes a cylindrical shell, a limiting ring is provided on the inner wall of the end of the cylindrical shell, and a flange is provided on the outer wall of the end of the cylindrical shell; the inner plate is pressed on the outside of the limiting ring, the outer side of the inner plate is flush with the end face of the cylindrical shell, and the edge of the outer plate is connected to the flange by bolts.

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