Tube bundle fixing structure of shell-and-tube heat exchanger

Abstract

The utility model discloses a fixed structure of tube bundle of shell and tube heat exchanger relates to heat exchanger technical field, the utility model discloses a shell body and the support of connection in the bottom end of shell body both ends, the shell body inside is installed with tube sheet and baffle respectively, the surface of tube sheet and baffle is provided with a plurality of mounting holes, the shell body inside still is installed with a plurality of tube bundles, a plurality of tube bundles all pass through mounting hole, and tube bundle is connected with baffle and tube sheet through mounting hole, the utility model discloses a fixed structure of tube bundle of shell and tube heat exchanger, and the inside groove inside mounting hole inboard is connected reset spring rod, and reset spring rod one end connects sealing ring, and reset spring rod bears against sealing ring, and sealing ring is contacted with tube bundle, and the sealing fixed performance is strengthened, prevents the deformation of the heat expansion and cold shrinkage of tube bundle when meeting water and influences the fixed effect.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger technology, and in particular to a tube bundle fixing structure for a shell-and-tube heat exchanger. Background Technology

[0002] Shell and tube heat exchangers (also known as tube-and-tube heat exchangers) are one of the most widely used heat exchange devices in the industrial field. Their core principle is to transfer heat through the temperature difference between the hot and cold fluids inside and outside the tube bundle. The working mechanism is that the hot fluid flows inside the tube (tube side) and the cold fluid flows in the space outside the tube (shell side). Heat is transferred from the high-temperature side to the low-temperature side through the tube wall.

[0003] Currently, tube bundles in shell-and-tube heat exchangers are typically fixed by welding. However, the tube bundles are usually subjected to alternating hot and cold water, and their shape will change slightly due to long-term thermal expansion and contraction. This can cause the tube bundles to loosen from the tube sheet or bend and deform, affecting their service life. Furthermore, after prolonged use, scale will accumulate on the outer wall of the tube bundles, which is difficult to clean and affects the heat exchange efficiency of the heat exchanger. Utility Model Content

[0004] The main objective of this invention is to provide a tube bundle fixing structure for a shell-and-tube heat exchanger to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: This utility model relates to a tube bundle fixing structure for a shell-and-tube heat exchanger, including a shell and supports connected to the bottom ends of both ends of the shell. A tube sheet and a baffle are respectively installed inside the shell, and the surfaces of the tube sheet and the baffle are provided with a plurality of mounting holes. A plurality of tube bundles are also installed inside the shell, and the plurality of tube bundles pass through the mounting holes, and the tube bundles are connected to the baffle and the tube sheet through the mounting holes.

[0006] As a further description of the above technical solution:

[0007] The tube sheet is provided in two sets, and the two sets of tube sheets are respectively connected to both ends of the tube bundle. The baffle is provided on the inner side of the tube sheet.

[0008] As a further description of the above technical solution:

[0009] Each of the aforementioned mounting holes has an inner groove, and a reset spring rod is connected inside the inner groove. One end of the reset spring rod is connected to a sealing ring. A brush strip is installed on the inner surface of the mounting hole, and the brush strip is connected to the sealing ring.

[0010] As a further description of the above technical solution:

[0011] A transverse thrust cylinder is connected to the inner side of the tube sheet. The output end of the transverse thrust cylinder is connected to a baffle plate. The baffle plate includes multiple sets, and telescopic support rods are connected between each pair of the multiple sets of baffle plates.

[0012] As a further description of the above technical solution:

[0013] One end of the tube bundle is provided with a cold fluid injection end, and the other end of the tube bundle is provided with a cold fluid discharge end. Both ends of the shell are equipped with distribution chambers. The cold fluid injection end and the cold fluid discharge end are adapted to the position of the distribution chambers. A head is connected to one side of the distribution chamber, and the distribution chamber is bolted to the shell.

[0014] As a further description of the above technical solution:

[0015] A hot fluid injection port is connected to the upper surface of one end of the housing, and a hot fluid discharge port is connected to the lower surface of the other end of the housing.

[0016] As a further description of the above technical solution:

[0017] The baffle plate has a circular-segmented structure.

[0018] This utility model has the following beneficial effects:

[0019] This utility model designs a tube bundle fixing structure for a shell-and-tube heat exchanger. A return spring rod is connected inside the inner groove on the inner side of the mounting hole, and a sealing ring is connected to one end of the return spring rod. The return spring rod supports the sealing ring, and the sealing ring contacts the tube bundle to enhance the sealing and fixing performance. This prevents the tube bundle from deforming or loosening due to thermal expansion and contraction when exposed to water, which would affect the fixing effect.

[0020] This utility model relates to a tube bundle fixing structure for a shell-and-tube heat exchanger. A brush strip is installed on the inner surface of the mounting hole. The brush strip is connected to a sealing ring, and the brush strip and sealing ring make synchronous contact with the tube bundle. During the lateral movement of the baffle, the brush strip is used to assist in cleaning the outer surface of the tube bundle, removing deposited scale, and maintaining the heat exchange efficiency of the heat exchanger. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the tube bundle fixing structure of the shell-and-tube heat exchanger of this utility model.

[0022] Figure 2 This is a schematic diagram of the internal structure of the housing of this utility model;

[0023] Figure 3 This is a schematic diagram of the mounting hole structure of this utility model;

[0024] Figure 4 This utility model Figure 2 Side view;

[0025] Figure 5 This utility model Figure 4 A cross-sectional view of the BB plane;

[0026] Figure 6 This utility model Figure 2 A magnified view of a section at point A in the middle;

[0027] Figure 7 This utility model Figure 5 A magnified view of a section at point C.

[0028] In the diagram: 1. Shell; 101. Distribution chamber; 1011. Head; 102. Support; 2. Tube bundle; 201. Cold fluid injection end; 202. Cold fluid discharge end; 3. Tube sheet; 301. Horizontal thrust cylinder; 302. Telescopic support rod; 4. Baffle; 401. Mounting hole; 4011. Inner groove; 4012. Return spring rod; 4013. Sealing ring; 4014. Brush strip; 5. Hot fluid injection port; 501. Hot fluid discharge port. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. The preferred embodiments of this utility model will now be described in more detail with reference to the accompanying drawings. Although the preferred embodiments of this utility model are shown in the drawings, it should be understood that this utility model can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this utility model more thorough and complete, and to fully convey the scope of this utility model to those skilled in the art.

[0030] Example:

[0031] Please refer to Figure 1 A tube bundle fixing structure for a shell-and-tube heat exchanger includes a shell 1 and supports 102 connected to the bottom ends of both ends of the shell 1, which support and fix the shell 1.

[0032] Please refer to Figures 2-7Inside the shell 1, tube sheet 3 and baffle 4 are respectively installed. Tube sheet 3 is used to install and fix the ends of tube bundle 2, while baffle 4 serves to enhance heat transfer and support tube bundle 2. Tube sheet 3 and baffle 4 are provided with several mounting holes 401 on their surfaces, which are used to limit and fix tube bundle 2. Inside the shell 1, several tube bundles 2 are also installed for the transfer of cold fluid. Several tube bundles 2 pass through mounting holes 401 and are connected to baffle 4 and tube sheet 3 through mounting holes 401. Tube sheet 3 serves as the support structure at both ends, and baffle 4 serves as the support structure in the middle section.

[0033] In a preferred embodiment, the tube sheet 3 is provided in two sets, and the two sets of tube sheets 3 are respectively connected to both ends of the tube bundle 2. The baffle 4 is provided inside the tube sheet 3. The tube sheet 3 supports and connects the two ends of the tube bundle 2, and the baffle 4 supports and connects the middle section of the tube bundle 2.

[0034] In a preferred embodiment, an inner groove 4011 is provided inside each of the mounting holes 401. A return spring rod 4012 is connected inside the inner groove 4011, and a sealing ring 4013 is connected to one end of the return spring rod 4012. A brush strip 4014 is installed on the inner surface of the mounting hole 401. The brush strip 4014 is connected to the sealing ring 4013. The return spring rod 4012 is connected inside the inner groove 4011. The return spring rod 4012 supports the sealing ring 4013. The sealing ring 4013 contacts the tube bundle 2 to prevent the tube bundle 2 from deforming or loosening due to thermal expansion and contraction when exposed to water, which would affect the fixing effect. The brush strip 4014 and the sealing ring 4013 make synchronous contact with the tube bundle 2. During the lateral movement of the baffle 4, the brush strip 4014 is used to assist in cleaning the outer surface of the tube bundle 2, removing deposited scale and maintaining the heat exchange efficiency of the heat exchanger.

[0035] A transverse thrust cylinder 301 is connected to the inner side of the tube sheet 3. The output end of the transverse thrust cylinder 301 is connected to the baffle 4. The baffle 4 includes multiple sets, and telescopic support rods 302 are connected between each pair of baffles 4. The transverse thrust cylinder 301 is used as the power mechanism for the transverse movement of the baffle 4, while the telescopic support rods 302 are used to maintain the stability of each baffle 4 during movement and prevent the tube bundle 2 from bending due to lack of support force. The transverse thrust cylinder 301 can be an existing device.

[0036] In a preferred embodiment, one end of the tube bundle 2 is provided with a cold fluid injection end 201, and the other end of the tube bundle 2 is provided with a cold fluid discharge end 202. The cold fluid is injected into the tube bundle 2 through the cold fluid injection end 201 and discharged through the cold fluid discharge end 202 (tube side). Both ends of the shell 1 are equipped with distribution chambers 101. The positions of the cold fluid injection end 201 and the cold fluid discharge end 202 are adapted to the distribution chambers 101. The cold fluid introduced or discharged from the tube bundle 2 is mixed and divided by the distribution chambers 101 to improve the flow efficiency. One side of the distribution chamber 101 is connected to a cap 1011 to seal and close the shell 1. The distribution chamber 101 is bolted to the shell 1 for easy disassembly and assembly, thereby facilitating the inspection and maintenance of the heat exchanger.

[0037] In a preferred embodiment, a hot fluid inlet 5 is connected to the upper surface of one end of the shell 1, and a hot fluid outlet 501 is connected to the lower surface of the other end of the shell 1. The hot fluid is introduced into the heat exchanger through the hot fluid inlet 5 at the upper end of the shell 1, flows through the gap between the shell 1 and the tube bundle 2, and circulates between the baffles 4, and finally flows out of the heat exchanger (shell side) through the hot fluid outlet 501 at the bottom of the shell 1.

[0038] As a preferred implementation, the baffle 4 has a segmental structure, and the hot fluid flows around the gap in the baffle 4. By changing the flow direction of the shell-side fluid, the degree of turbulence is enhanced and the heat transfer efficiency is improved.

[0039] The present invention relates to a tube bundle fixing structure for a shell-and-tube heat exchanger. A return spring rod 4012 is connected inside the inner groove 4011 on the inner side of the mounting hole 401, and one end of the return spring rod 4012 is connected to a sealing ring 4013. The return spring rod 4012 abuts against the sealing ring 4013, which contacts the tube bundle 2, enhancing the sealing and fixing effect. A brush strip 4014 is installed on the inner surface of the mounting hole 401, connected to the sealing ring 4013. The brush strip 4014 and the sealing ring 4013 synchronously contact the tube bundle 2. During the lateral movement of the baffle 4, the brush strip 4014 assists in cleaning the outer surface of the tube bundle 2, removing deposited scale and maintaining the heat exchanger's heat exchange efficiency.

[0040] A transverse thrust cylinder 301 is connected to the inner side of the tube sheet 3. The output end of the transverse thrust cylinder 301 is connected to the baffle 4. The transverse thrust cylinder 301 is used as the power mechanism for the transverse movement of the baffle 4, and the operation is highly automated.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A tube bundle fixing structure for a shell-and-tube heat exchanger, comprising a shell (1) and supports (102) connected to the bottom ends of both ends of the shell (1), characterized in that: The shell (1) is equipped with a tube sheet (3) and a baffle (4) respectively. The tube sheet (3) and the baffle (4) are provided with a number of mounting holes (401) on their surfaces. The housing (1) is also equipped with a number of tube bundles (2), each of which passes through a mounting hole (401) and is connected to the baffle (4) and tube sheet (3) through the mounting hole (401).

2. The tube bundle fixing structure for a shell-and-tube heat exchanger according to claim 1, characterized in that: The tube sheet (3) is provided in two sets, and the two sets of tube sheets (3) are respectively connected to both ends of the tube bundle (2). The baffle (4) is provided on the inner side of the tube sheet (3).

3. The tube bundle fixing structure for a shell-and-tube heat exchanger according to claim 1, characterized in that: An inner groove (4011) is provided inside each of the mounting holes (401). A reset spring rod (4012) is connected inside the inner groove (4011), and a sealing ring (4013) is connected to one end of the reset spring rod (4012). A brush strip (4014) is installed on the inner surface of the mounting hole (401), and the brush strip (4014) is connected to the sealing ring (4013).

4. The tube bundle fixing structure for a shell-and-tube heat exchanger according to claim 1, characterized in that: The tube sheet (3) is connected to a horizontal thrust cylinder (301) on its inner side. The output end of the horizontal thrust cylinder (301) is connected to a baffle (4). The baffle (4) includes multiple sets, and telescopic support rods (302) are connected between each pair of the multiple sets of baffles (4).

5. The tube bundle fixing structure for a shell-and-tube heat exchanger according to claim 1, characterized in that: One end of the tube bundle (2) is provided with a cold fluid injection end (201), and the other end of the tube bundle (2) is provided with a cold fluid discharge end (202). Both ends of the shell (1) are equipped with distribution chambers (101). The cold fluid injection end (201) and the cold fluid discharge end (202) are adapted to the position of the distribution chamber (101). A head (1011) is connected to one side of the distribution chamber (101), and the distribution chamber (101) is bolted to the shell (1).

6. The tube bundle fixing structure for a shell-and-tube heat exchanger according to claim 1, characterized in that: A hot fluid inlet (5) is connected to the upper surface of one end of the housing (1), and a hot fluid outlet (501) is connected to the lower surface of the other end of the housing (1).

7. The tube bundle fixing structure for a shell-and-tube heat exchanger according to claim 1, characterized in that: The baffle (4) has a circular-segmented structure.

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