Shell-and-tube heat exchanger sealing structure

Abstract

The utility model discloses a shell-and-tube heat exchanger sealing structure which comprises a heat exchanger shell, an installation flange plate is fixedly welded to the end of the heat exchanger shell, the end face of the installation flange plate is attached to one side of an outer sealing gasket, and the other side of the outer sealing gasket is attached to the surface of one side of an end flange plate. An end cover is fixedly welded to the tail end of the outer side of the end flange plate, sealing bolts are installed in holes formed in the installation flange plate, the outer sealing gasket and the end flange plate in a penetrating mode, and sealing nuts are installed at the tail ends of the sealing bolts. An inner sealing ring is installed between the inner wall of the end of the heat exchanger shell and the outer surface of the part, located on the inner side of the heat exchanger shell, of the end flange plate. According to the sealing structure of the shell-and-tube heat exchanger, the novel structural design is adopted, the end of the shell-and-tube heat exchanger is sealed from multiple positions, the sealing effect is guaranteed, the detection equipment is arranged, the expansion or contraction variable of the elastic sealing piece can be accurately and visually known, and whether the elastic sealing piece needs to be replaced or not is judged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of shell and tube heat exchanger, concretely to a shell and tube heat exchanger sealing structure. BACKGROUND

[0002] The shell and tube heat exchanger is mainly composed of a shell, a tube bundle, a tube plate, a head and the like, and the sealing structure is mainly related to the connection between these components to prevent fluid leakage, and the heat exchanger has simple structure, low cost, wide flow cross section and easy cleaning of scale, but has low heat transfer coefficient and large floor area, can be manufactured by various structural materials and can be used under high temperature and high pressure, and is the most widely used type.

[0003] The existing shell and tube heat exchanger end sealing structure is simple, only sealed by elastic sealing pieces, has poor thermal fatigue resistance, is prone to loosening after long-term use, and has no detection mechanism of the elastic sealing pieces, so that the expansion or shrinkage variable of the elastic sealing pieces cannot be accurately and intuitively known, and the maintenance cannot be timely performed. UTILITY MODEL CONTENTS

[0004] The utility model discloses a shell and tube heat exchanger sealing structure, to solve the problem that the existing shell and tube heat exchanger end sealing structure is simple in the background art, only sealed by elastic sealing pieces, has poor thermal fatigue resistance, is prone to loosening after long-term use, has no detection mechanism of the elastic sealing pieces, so that the expansion or shrinkage variable of the elastic sealing pieces cannot be accurately and intuitively known, and the maintenance cannot be timely performed.

[0005] To achieve the above object, the utility model provides the following technical scheme: a shell and tube heat exchanger sealing structure, including heat exchanger shell, the heat exchanger shell end welding fixedly has installation flange plate, the installation flange plate end surface is attached with the one side of outer sealing washer, the other side of outer sealing washer is attached with the one side surface of end flange plate, the end flange plate outside terminal welding fixedly has end cover, the hole of installation flange plate, outer sealing washer and end flange plate is installed in the hole and is penetrated with sealing bolt, the sealing bolt terminal is installed with sealing nut, the heat exchanger shell end inner wall and end flange plate are located between the outer surface of heat exchanger shell inside portion and are installed with inner sealing ring, the end flange plate outside curved surface is installed with fixed plate, the fixed plate one side is installed with measuring plate, the measuring plate is penetrated with limiting window, the limiting window is set up in limiting plate, the limiting plate is fixed on the outside curved surface of installation flange plate.

[0006] Preferably, the inner sealing ring is fixedly installed on the end inner wall of the heat exchanger shell, and one side of the inner sealing ring is attached with the end flange plate located at the inside end of the heat exchanger shell.

[0007] Preferably, the end flange plate is a T-shaped section in the front view, and the outer end of the end flange plate is tightly attached to the inner end of the heat exchanger shell and the inner side of the mounting flange plate.

[0008] Preferably, the inner diameter of the inner sealing ring is equal to the inner diameter of the end flange plate, and the inner sealing ring is made of hard material.

[0009] Preferably, the inner sealing rings are equidistantly distributed, and the total length of the equidistantly distributed inner sealing rings is greater than half of the length of the attached part of the heat exchanger shell and the end flange plate.

[0010] Preferably, the fixed plate, the measuring plate and the limiting plate are equiangularly distributed about the center of the mounting flange plate, and the measuring plate is vertically distributed with the fixed plate and the limiting plate.

[0011] Preferably, the measuring plate and the limiting window are slidingly connected, and the length of the measuring plate is greater than 3 times the thickness of the outer sealing gasket.

[0012] Preferably, the limiting plate is provided with a standard scale on the outer side away from the connection part of the mounting flange plate, the outer sealing gasket and the end flange plate, and the total length of the standard scale is greater than 3 / 4 of the total length of the measuring plate.

[0013] Compared with the prior art, the tube-shell heat exchanger sealing structure has the advantages that: the novel structure design not only seals the end part of the tube-shell heat exchanger from multiple positions to ensure the sealing effect, but also sets detection equipment to accurately and intuitively obtain the expansion or contraction variable of the elastic sealing element and determine whether the elastic sealing element needs to be replaced.

[0014] 1. The heat exchanger shell and the end cover are stably connected and sealed at multiple positions by the cooperation of the mounting flange plate, the outer sealing gasket, the end flange plate, the sealing bolt, the sealing nut, the inner sealing ring and the inner sealing ring, thereby greatly improving the sealing effect.

[0015] 2. By observing the relative position of the standard scale on the measuring plate and the limiting plate, it can be determined whether the expansion or contraction variable of the outer sealing gasket between the mounting flange plate and the end flange plate is within the normal range, so as to accurately monitor the working state of the outer sealing gasket and facilitate the determination of whether the outer sealing gasket is invalid. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a front view structural schematic diagram of the utility model;

[0017] Figure 2 It is a side view structural schematic diagram of the end flange plate, the end cover and the sealing bolt of the utility model;

[0018] Figure 3 It is a front view sectional structure schematic diagram of the utility model;

[0019] Figure 4 It is the side view section structure schematic diagram of the outer sealing gasket of the utility model;

[0020] Figure 5 It is the front view limiting window and limiting plate section structure schematic diagram of the utility model.

[0021] In the drawing: 1, heat exchanger shell; 2, mounting flange plate; 3, outer sealing gasket; 4, end flange plate; 5, end cover; 6, sealing bolt; 7, sealing nut; 8, inner sealing ring; 9, inner sealing ring; 10, fixed plate; 11, measuring plate; 12, limiting window; 13, limiting plate; 14, standard scale. DETAILED DESCRIPTION

[0022] The technical scheme in the embodiments of the utility model will be described clearly and completely in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the scope of protection of the utility model.

[0023] Please refer to Figures 1-5 The utility model provides a kind of technical scheme: a tube and shell heat exchanger sealing structure, including heat exchanger shell 1, mounting flange plate 2, outer sealing gasket 3, end flange plate 4, end cover 5, sealing bolt 6, sealing nut 7, inner sealing ring 8, inner sealing ring 9, fixed plate 10, measuring plate 11, limiting window 12, limiting plate 13 and standard scale 14, heat exchanger shell 1 end welding fixed mounting flange plate 2, mounting flange plate 2 end surface and outer sealing gasket 3 one side adhere, outer sealing gasket 3 other side and end flange plate 4 one side surface adhere, end flange plate 4 outside end welding fixed end cover 5, sealing bolt 6 is installed in the hole provided on mounting flange plate 2, outer sealing gasket 3 and end flange plate 4, sealing bolt 6 end installs sealing nut 7, the inner wall of heat exchanger shell 1 end and end flange plate 4 between the outer surface of the inside part of heat exchanger shell 1 installs inner sealing ring 9, fixed plate 10 is installed on the curved surface of end flange plate 4 outside, measuring plate 11 is installed on one side of fixed plate 10, measuring plate 11 penetrates limiting window 12, limiting window 12 is provided on limiting plate 13, limiting plate 13 is fixed on the curved surface of mounting flange plate 2 outside.

[0024] The inner sealing ring 8 is fixedly installed on the inner wall of the end portion of the heat exchanger shell 1 in the example, and the inner sealing ring 8 is adhered to the end flange plate 4 located at the inside end portion of the heat exchanger shell 1 on one side. The above structure design can adhere and seal the end flange plate 4 located at the inside end portion of the heat exchanger shell 1.

[0025] The front view section of the end flange 4 is "T" type, the outer side of one end of the end flange 4 is closely combined with the inner side of the end of the heat exchanger shell 1 and the inner side of the mounting flange 2, the above structure design makes the end of the end flange 4 can be stably extended into the inner side of the end of the heat exchanger shell 1 and the inner side of the mounting flange 2, and ensures the stability of the installation.

[0026] The inner diameter of the inner sealing ring 8 is equal to the inner diameter of the end flange 4, the inner sealing ring 8 is made of hard material, and the above structure design ensures that the inner sealing ring 8 is not easy to deform and can stably seal the end flange 4.

[0027] The inner sealing ring 9 is distributed at equal intervals, and the overall length of the inner sealing ring 9 distributed at equal intervals is greater than half the length of the combined part of the heat exchanger shell 1 and the end of the end flange 4, and the above structure design can stably seal the combined part of the heat exchanger shell 1 and the end of the end flange 4.

[0028] The fixed plate 10, the measuring plate 11 and the limiting plate 13 are distributed at equal angles about the center of the mounting flange 2, and the measuring plate 11 is vertically distributed with the fixed plate 10 and the limiting plate 13, and the above structure design can detect the distance between the mounting flange 2 and the end flange 4 at multiple points.

[0029] The measuring plate 11 and the limiting window 12 are slidingly connected, and the length of the measuring plate 11 is greater than 3 times the thickness of the outer sealing gasket 3, and the above structure design ensures that the length of the measuring plate 11 is sufficient, and can smoothly slide along the limiting window 12 when the outer sealing gasket 3 expands or shrinks.

[0030] The limiting plate 13 is provided with a standard scale 14 on the outer side away from the connection of the mounting flange 2, the outer sealing gasket 3 and the end flange 4, and the overall length of the standard scale 14 is greater than 3 / 4 of the overall length of the measuring plate 11, and the above structure design makes it possible to intuitively observe the relative position of the limiting plate 13 and the limiting plate 13 through the standard scale 14, and accurately judge the expansion or shrinkage amount of the outer sealing gasket 3.

[0031] Working principle: when installing, the outer sealing gasket 3 is sleeved on the end of the end flange 4 as shown in Figure 2 , the end flange 4 is inserted into the end of the heat exchanger shell 1, the end of the end flange 4 is combined with the inner sealing ring 8, and the sealing bolt 6 and the sealing nut 7 are installed and locked, the measuring plate 11 is inserted into the limiting window 12, and the scale at which the standard scale 14 and the opening at both ends of the limiting window 12 are aligned is recorded at this time;

[0032] In normal operation, the outer sealing gasket 3, the inner sealing ring 8 and the inner sealing ring 9 cooperate with each other to ensure the stable sealing connection between the heat exchanger shell 1 and the end cover 5. The standard scale 14 on the measuring plate 11 and the scale at the opening of the limiting window 12 at both ends are aligned to observe whether there is deviation, and whether the deviation belongs to the normal expansion or contraction range of the outer sealing gasket 3. If it exceeds, it can be disassembled and repaired, which is the working principle of the sealing structure of the shell-and-tube heat exchanger.

[0033] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A tube and shell heat exchanger sealing structure comprising a heat exchanger shell (1), characterized in that: The heat exchanger shell (1) end welding fixed with installation flange (2), the installation flange (2) end face and the one side of outer sealing gasket (3) are pasted, the other side of outer sealing gasket (3) and the one side surface of end flange (4) are pasted, the end flange (4) outside end welding fixed with end cover (5), the hole in installation flange (2), outer sealing gasket (3) and end flange (4) are installed with sealing bolt (6) through, the sealing bolt (6) end installs sealing nut (7), the end wall of heat exchanger shell (1) and end flange (4) between the outer surface of inside part of heat exchanger shell (1) installs inner sealing ring (9), the outer curve of end flange (4) installs fixed plate (10), the one side of fixed plate (10) installs measuring plate (11), measuring plate (11) penetrates limiting window (12), limiting window (12) is set up on limiting plate (13), limiting plate (13) is fixed on the outer curve of installation flange (2).

2. A shell-and-tube heat exchanger sealing structure according to claim 1, characterized in that: The inner sealing ring (8) is fixedly installed on the inner wall of the end portion of the heat exchanger shell (1), and the inner sealing ring (8) is pasted on the end portion of the end flange (4) inside the heat exchanger shell (1).

3. The seal structure for a shell-and-tube heat exchanger according to claim 1, wherein: The front view of the end flange (4) is "T" type, and the outer side of one end of the end flange (4) is closely pasted with the inner end of the heat exchanger shell (1) and the inner side of the installation flange (2).

4. The seal structure for a shell-and-tube heat exchanger according to claim 2, wherein: The inner diameter of the inner sealing ring (8) is equal to the inner diameter of the end flange (4), and the inner sealing ring (8) is made of hard material.

5. A shell-and-tube heat exchanger seal structure according to claim 1, wherein: The inner sealing ring (8) is made of hard material.

6. A shell-and-tube heat exchanger seal according to claim 1, wherein: The inner sealing ring (8) is made of hard material.

7. A shell-and-tube heat exchanger seal according to claim 1, wherein: The inner sealing ring (8) is made of hard material.

8. A shell-and-tube heat exchanger seal according to claim 1, wherein: The fixed plate (10), the measuring plate (11) and the limiting plate (13) are evenly distributed about the center of the installation flange (2), and the measuring plate (11) is vertically distributed with the fixed plate (10) and the limiting plate (13). The measuring plate (11) and the limiting window (12) are slidingly connected, and the length of the measuring plate (11) is greater than 3 times the thickness of the outer sealing gasket (3). The limiting plate (13) is provided with a standard scale (14) on the outer side away from the connection of the installation flange (2), the outer sealing gasket (3) and the end flange (4), and the overall length of the standard scale (14) is greater than 3 / 4 of the overall length of the measuring plate (11).

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