Heat conduction pipe sealing connection structure of shell-and-tube heat exchanger

Abstract

The utility model discloses a heat conduction pipe sealing and connecting structure of a shell-and-tube heat exchanger, which comprises a bundling disc and an annular lip plate integrally formed on the peripheral surface of the bundling disc, and a plurality of U-shaped heat conduction pipes extending downwards are arranged in the bundling disc. A plurality of U-shaped heat conduction pipes are arranged in the bundling disc, a conical opening isolation barrel used for gathering the U-shaped heat conduction pipes is installed at the edge position of the bottom end of the bundling disc, a lower packaging disc is fixed to the bottom end of the conical opening isolation barrel, a sealing cavity is formed in the position, above the lower packaging disc, in the conical opening isolation barrel, and a double-cavity type sealing cover is installed at the top end of the bundling disc. According to the utility model, a material medium in the shell can be prevented from entering the conical opening isolation cylinder and being in contact with the connecting point, and a cooling medium in the double-cavity sealing cover is effectively prevented from leaking into the shell of the heat exchanger from the connecting point, so that the possible product quality problem is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of shell-and-tube heat exchangers, in particular to a sealing connection structure for heat-conducting tubes of a shell-and-tube heat exchanger. Background Technique

[0002] A shell-and-tube heat exchanger is a common industrial heat exchange device, and its main structure includes a shell, a tube bundle, and a fluid passage. The shell is a cylindrical container, which is divided into two channels inside, namely, the cooling medium channel inside the tube bundle and the material medium channel formed by the shell. The tube bundle is composed of multiple slender tubes, which are fixed in the shell through tube sheets and fixed supports. The fluid passage includes the shell side and the tube bundle side. Fluids enter from the shell side and the tube bundle side respectively, and energy transfer is completed through heat exchange on the surface of the tubes. When high-temperature fluid contacts low-temperature fluid, heat will be transferred from the high-temperature fluid to the low-temperature fluid. This process can be achieved through convection, convective heat transfer, and conduction. When the fluid passes through the heat exchanger, the high-temperature fluid releases heat, and the low-temperature fluid absorbs heat, thereby realizing temperature regulation and energy transfer. However, at the present stage, when installing the tube bundle of the shell-and-tube heat exchanger, the end of the tube bundle needs to be introduced into the shell from one end cover of the shell-and-tube heat exchanger. At this time, each tube bundle and the end cover will form a connection point. After the shell-and-tube heat exchanger works for a long time, especially under high temperature and high pressure or periodic working conditions, these connection points may have minor sealing problems, causing the cooling medium inside the end cover of the shell-and-tube heat exchanger to seep into the shell from the above connection points and mix with the material medium in the shell, resulting in a decline in product quality. Content of the Utility Model

[0003] The purpose of the utility model is to provide a sealing connection structure for heat-conducting tubes of a shell-and-tube heat exchanger. A conical orifice isolation cylinder that can surround several U-shaped heat-conducting tubes is added at the bottom end of the bundle disk, and a lower encapsulation disk that can form a sealed chamber inside itself is added at the bottom end of the conical orifice isolation cylinder, so that the connection points of the bundle disk and the U-shaped heat-conducting tubes are sealed by the conical orifice isolation cylinder and the lower encapsulation disk, avoiding direct contact between the connection points and the material medium to be heat-exchanged in the shell-and-tube heat exchanger, so as to solve the problems raised in the above background technique.

[0004] To achieve the above purpose, the utility model provides the following technical solution: A sealing connection structure for heat-conducting tubes of a shell-and-tube heat exchanger, including a bundle disk and an annular lip plate integrally formed on the outer peripheral surface of the bundle disk. A number of downward-extending U-shaped heat-conducting tubes are installed inside the bundle disk. A conical orifice isolation cylinder for gathering a number of U-shaped heat-conducting tubes is installed at the edge position of the bottom end of the bundle disk, and a lower encapsulation disk is fixed at the bottom end of the conical orifice isolation cylinder. A sealed chamber is arranged inside the conical orifice isolation cylinder above the lower encapsulation disk. A double-chamber sealing cover is installed at the top end of the bundle disk, and electromagnetic valves are installed on both sides of the top end of the double-chamber sealing cover.

[0005] Preferably, a cage plate is fixed to one end of the surfaces of several of the U-shaped heat conduction tubes.

[0006] Preferably, a sealing ring is installed at the edge position of the bottom end of the annular lip plate, and a gap portion is provided between the inner wall surface of the sealing ring and the outer wall surface of the tapered orifice isolation cylinder.

[0007] Preferably, four equally spaced bolt holes are provided at the edge position of the top end of the annular lip plate.

[0008] Preferably, ribs are integrally formed on the top wall of the double-chamber sealing cover, and the ribs divide the interior of the double-chamber sealing cover into liquid inlet chambers and liquid discharge chambers with equal volumes.

[0009] Preferably, a support ring is integrally formed at one end inside the tapered orifice isolation cylinder, and an annular cutting groove for embedding and installing the lower encapsulation plate is provided on the inner wall of the support ring.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows: The heat conduction tube sealing connection structure of the tube-in-tube heat exchanger forms a plurality of connection points between the beam collecting plate and multiple U-shaped heat conduction tubes through the mutually cooperating structures such as the tapered orifice isolation cylinder and the lower encapsulation plate. The tapered orifice isolation cylinder and the lower encapsulation plate form a sealed chamber. Due to the existence of the sealed chamber, it is possible to prevent the material medium in the outer shell from entering the tapered orifice isolation cylinder and contacting the connection points. Therefore, even during long-term operation, it can effectively prevent the cooling medium in the double-chamber sealing cover from leaking from the connection points into the interior of the heat exchanger outer shell, thereby avoiding possible product quality problems and ensuring the continuity of the production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is the front view structural schematic diagram of the present utility model;

[0012] Figure 2 is the three-dimensional structural schematic Figure 1 ;

[0013] Figure 3 is the three-dimensional structural schematic Figure 2 ;

[0014] Figure 4 is the three-dimensional sectional structural schematic diagram of the present utility model;

[0015] Figure 5 is the three-dimensional structural schematic diagram of the double-chamber end cover of the present utility model.

[0016] In the figure: 1. Cluster disk; 2. Annular lip plate; 201. Bolting hole; 3. Sealing ring; 4. Tapered orifice isolation cylinder; 401. Support ring; 402. Annular cutting groove; 5. U-shaped heat conduction tube; 6. Cage disk; 7. Double-chamber sealing cover; 701. Rib; 702. Liquid inlet chamber; 703. Liquid discharge chamber; 8. Solenoid valve; 9. Lower encapsulation disk. Specific implementation mode

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0018] Please refer to Figures 1-5 , an embodiment provided by the present invention: a heat conduction tube sealing connection structure of a shell-and-tube heat exchanger, including a cluster disk 1 and an annular lip plate 2 integrally formed on the outer peripheral surface of the cluster disk 1. A plurality of downwardly extending U-shaped heat conduction tubes 5 are installed inside the cluster disk 1. A tapered orifice isolation cylinder 4 for gathering a plurality of U-shaped heat conduction tubes 5 is installed at the edge position of the bottom end of the cluster disk 1. The bottom end of the tapered orifice isolation cylinder 4 is fixed with a lower encapsulation disk 9. A sealing chamber is arranged inside the tapered orifice isolation cylinder 4 above the lower encapsulation disk 9. A double-chamber sealing cover 7 is installed at the top end of the cluster disk 1, and solenoid valves 8 are installed on both sides of the top end of the double-chamber sealing cover 7;

[0019] Four equally spaced bolting holes 201 are arranged at the edge position of the top end of the annular lip plate 2. A sealing ring 3 is installed at the edge position of the bottom end of the annular lip plate 2. There is a gap between the inner wall surface of the sealing ring 3 and the outer wall surface of the tapered orifice isolation cylinder 4. The cluster disk 1 is bolted to the port part of the shell of the shell-and-tube heat exchanger through the annular lip plate 2, the bolting holes 201 and bolts. In this process, the sealing ring 3 serves to seal the connection surface between the annular lip plate 2 and the shell of the shell-and-tube heat exchanger;

[0020] A cage disk 6 is fixed at one end of the surfaces of a plurality of U-shaped heat conduction tubes 5. On the one hand, the lower encapsulation disk 9 serves to seal the tapered orifice isolation cylinder 4. On the other hand, when the heat exchanger is operating, the fluid passes through the U-shaped heat conduction tubes 5, and the tube bundle may vibrate or change position. The structural design of the cage disk 6 and the lower encapsulation disk 9 can ensure the position of the tube bundle is fixed, reduce unnecessary mechanical movement, and ensure the reliability of the heat exchange process;

[0021] On the top wall of the double-chamber seal cover 7, there is an integrally formed rib 701. The rib 701 divides the interior of the double-chamber seal cover 7 into an equal-volume liquid inlet chamber 702 and a liquid discharge chamber 703. Two solenoid valves 8 respectively control the conduction states of the cooling medium in the liquid inlet chamber 702 and the liquid discharge chamber 703. The rib 701 isolates the cooling medium before and after heat exchange, ensuring that the cooling medium enters from one end of the U-shaped heat conduction tube 5 and exits from the other end.

[0022] At one end inside the tapered orifice isolation cylinder 4, there is an integrally formed support ring 401. And on the inner wall of the support ring 401, there is an annular cutting groove 402 for the lower encapsulation plate 9 to be embedded and installed. The annular cutting groove 402 can ensure the correct installation and fixation of the lower encapsulation plate 9. And the support ring 401 reduces the possibility of local stress concentration by evenly distributing the force.

[0023] When the embodiment of the present application is in use, first, the staff removes the end cover of the shell-and-tube heat exchanger and makes the beam collecting plate 1 dock at the end position of the shell of the shell-and-tube heat exchanger until the U-shaped heat conduction tube 5 is pushed into the shell of the shell-and-tube heat exchanger. At this time, a channel for the cooling medium to flow is formed inside the U-shaped heat conduction tube 5, and the medium to be heat-exchanged is located in the shell of the shell-and-tube heat exchanger. Subsequently, the staff uses bolts to fix the beam collecting plate 1, the annular lip plate 2 and the shell of the shell-and-tube heat exchanger together, and reassembles the end cover at the end of the shell of the shell-and-tube heat exchanger. At this time, the cooling medium enters the double-chamber seal cover 7 from one of the solenoid valves 8 and is split into each U-shaped heat conduction tube 5. The heat-exchanged cooling medium then enters another chamber of the double-chamber seal cover 7 through the U-shaped heat conduction tube 5 and is discharged through another solenoid valve 8 to achieve the purpose of heat exchange of the material medium. During this process, several connection points are formed between the beam collecting plate 1 and the multiple U-shaped heat conduction tubes 5, and the tapered orifice isolation cylinder 4 and the lower encapsulation plate 9 form a sealed chamber. Due to the existence of the sealed chamber, it can prevent the material medium in the shell from entering the tapered orifice isolation cylinder 4 and contacting the connection points. Therefore, even during a long-term operation process, it can effectively prevent the cooling medium in the double-chamber seal cover 7 from leaking from the connection points into the interior of the heat exchanger shell, thereby avoiding possible product quality problems and ensuring the continuity of the production process.

[0024] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, in any regard, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, it is intended to encompass all changes falling within the meaning and scope of the equivalent elements of the claims in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A heat transfer pipe sealing connection structure of a shell and tube heat exchanger, characterized in that: The invention comprises a clustering disk (1) and an annular lip plate (2) integrally formed on the outer peripheral surface of the clustering disk (1); a plurality of U-shaped heat conducting tubes (5) extending downward are installed inside the clustering disk (1); a conical-mouthed isolating cylinder (4) for gathering the plurality of U-shaped heat conducting tubes (5) is installed at the edge position of the bottom end of the clustering disk (1); a lower sealing disk (9) is fixed at the bottom end of the conical-mouthed isolating cylinder (4); a sealed chamber is arranged inside the conical-mouthed isolating cylinder (4) above the lower sealing disk (9); a double-chambered sealing cover (7) is installed at the top end of the clustering disk (1); and electromagnetic valves (8) are installed on both sides of the top end of the double-chambered sealing cover (7).

2. The heat transfer pipe sealing connection structure of a shell-and-tube heat exchanger according to claim 1, characterized in that: A cage plate (6) is fixed to one end of the surface of a plurality of the U-shaped heat conducting pipes (5).

3. The heat transfer pipe sealing connection structure of a shell-and-tube heat exchanger according to claim 1, characterized in that: A sealing ring (3) is installed at the edge of the bottom end of the annular lip plate (2), and a gap is provided between the inner wall surface of the sealing ring (3) and the outer wall surface of the conical-mouth isolation cylinder (4).

4. The heat transfer pipe sealing connection structure of a shell-and-tube heat exchanger according to claim 1, characterized in that: Four bolting holes (201) with equal spacing are arranged at the edge of the top end of the annular lip plate (2).

5. The heat transfer pipe sealing connection structure of a shell-and-tube heat exchanger according to claim 1, characterized in that: A rib (701) is integrally formed on the top wall of the double-chamber sealing cover (7), and the rib (701) divides the interior of the double-chamber sealing cover (7) into a liquid inlet chamber (702) and a liquid discharge chamber (703) of equal volume.

6. The heat transfer pipe sealing connection structure of a shell-and-tube heat exchanger according to claim 1, characterized in that: A support ring (401) is integrally formed at one end of the interior of the cone-mouth isolation cylinder (4), and an annular cut-out groove (402) for the lower packaging disc (9) to be embedded and installed is provided on the inner wall of the support ring (401).

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