Hydraulic expansion mechanism for a heat exchanger and tube sheet

Abstract

The utility model discloses a kind of hydraulic expansion joint mechanism of heat exchanger and tube plate, comprising: first closed pedestal, second closed pedestal and several outer periphery locking bolt body;The utility model relates to the technical field of heat exchanger, and the mechanism is connected by hydraulic expansion joint link structure, to form a strict closed cavity between heat exchanger pipeline and multiple tube plate branch pipeline, to provide reliable guarantee for the connection of heat exchanger and tube plate, while the mechanism also uses auxiliary maintenance elastic structure design, substantially improve the maintenance convenience of internal component, when component appears aging or damage, can be quickly replaced and overhauled, effectively reduce maintenance difficulty and time cost, compared with traditional nut link or valve link structure, the easy-to-use advantage of the design is remarkable, not only realizes the efficient stable connection of heat exchanger and tube plate, and its sealing effect also far exceeds ordinary market product.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger technology, specifically to a hydraulic expansion connection mechanism between a heat exchanger and a tube sheet. Background Technology

[0002] Heat exchangers are the core equipment for transferring heat. Tube sheets, as key connecting components, not only fix the tube bundle but also separate the fluids in the tube side from those in the shell side. Due to their special structure, pressure concentration problems easily occur at the junction of the two: the tube sheet must bear the pressure of the fluids on both sides at the same time. In addition, there are tiny gaps between the tubes and the tube sheet holes. The thermal expansion and contraction of the metal at high temperatures will intensify the friction of the contact surface, forming a local high-pressure area. After long-term operation, material fatigue or seal aging will cause the medium to seep out from the gaps. Therefore, it is crucial to strengthen the sealing and waterproofing of the connection. There may be technical solutions to the above problems in the existing technology, but this case aims to provide an alternative or replacement technical solution. Utility Model Content

[0003] To achieve the above objectives, this utility model provides the following technical solution: a hydraulic expansion joint mechanism for a heat exchanger and tube sheet, comprising: a first closed base, a second closed base, and a plurality of peripheral locking bolts, wherein the plurality of peripheral locking bolts are respectively inserted into the second closed base and respectively connected to the first closed base; a hydraulic expansion joint connection structure is installed on the first closed base; and an auxiliary maintenance elastic structure is installed on the second closed base; the hydraulic expansion joint connection structure comprises: a plurality of tube sheet branch pipes, a collection cavity, an extension tube, a heat exchanger pipe, a plurality of tube wall nesting keys, and a coupling plastic sealing ring;

[0004] A plurality of tube sheet branch pipes are fixedly inserted into the first closed base. The collection cavity is installed inside the first closed base and is connected to the plurality of tube sheet branch pipes. An extension tube is inserted into the first closed base and is connected to the collection cavity. The extension tube is movably inserted into the heat exchanger pipe. The heat exchanger pipe is fixedly inserted into the second closed base and is movably connected to the coupling plastic sealing ring. A gasket placement groove is provided on the first closed base. The coupling plastic sealing ring is installed on the first closed base through the gasket placement groove and is fitted onto the outside of the extension tube.

[0005] It should be noted that, during assembly, the heat exchanger pipes are first inserted and combined with the second sealing base. Since the inner surface of the second sealing base's insertion through-hole has multiple annular grooves, expansion equipment such as a pipe expander needs to be inserted into the heat exchanger pipes during the initial assembly stage to tension-expand the annular grooves of the heat exchanger pipes and the second sealing base. After expansion, the heat exchanger pipe wall will penetrate deep into and embed into the multiple annular grooves of the second sealing base, forming multiple pipe wall nesting keys. The first sealing base covers the outside of the main cavity and multiple tube sheet branch pipes, making the main cavity and tube sheet branch pipes together form a complete sealed cavity. Next, the extension tube is inserted into the heat exchanger pipes, and then the first and second sealing bases are connected and fitted together. Finally, multiple peripheral locking bolts are used to complete the locking and sealing. The pipe openings of the heat exchanger pipes are then pressed onto the coupling plastic sealing ring, completing all the steps. After assembly, the heat exchanger pipes, extension tubes, main chamber, and multiple tube sheet branch pipes together form a perfect closed circuit. This closed circuit can withstand not only high-pressure liquids but also high-temperature liquids, while remaining unaffected by temperature differences between hot and cold liquids, ensuring the closed system always remains sealed. More importantly, the sealing effect is even better when the flow rate in the multiple tube sheet branch pipes increases and the pressure of the liquid filling the heat exchanger pipes rises accordingly. Furthermore, the robust connection formed by the expansion joint process of the heat exchanger pipes far surpasses the sealing performance and structural strength of traditional nut-sealing methods. The auxiliary sealing and waterproof adhesive layer on the second sealing base makes the connection between the first and second sealing bases even tighter, further preventing leakage. The corrosion-resistant coating on the first sealing base allows it to operate in harsher environments.

[0006] Preferably, the auxiliary maintenance elastic structure includes: a pair of side ground keys, a pair of first ground bolts, a pair of connecting ground blocks, a pair of redundant push-position spring columns, a pair of side ground blocks, and a pair of second ground bolts;

[0007] A pair of side ground keys are respectively installed on the first closed base, a pair of first ground bolts are respectively inserted into the pair of side ground keys, a pair of connecting ground blocks are respectively installed on the second closed base, a pair of redundant push spring columns are respectively connected to the pair of connecting ground blocks, a pair of side ground blocks are respectively installed on the pair of redundant push spring columns, and a pair of second ground bolts are respectively inserted into the pair of side ground blocks;

[0008] It should be noted that, during assembly, the first pair of first ground bolt knobs are first inserted into the pair of side ground keys. Then, the side ground blocks are adjusted to the appropriate positions, and the corresponding second ground bolts are screwed onto them to stably fix the side ground blocks and side ground keys to the ground at the installation position. Lateral reinforcement is applied to the second and first closed bases from both sides to ensure structural stability. When emergency maintenance is required, the second closed base can be separated from the first closed base simply by loosening the knobs of multiple outer peripheral locking bolts. At this time, the redundant push spring column can provide a certain displacement margin, which facilitates the disassembly of the second closed base and the quick repair of the multiple components on it. In addition, if the outer peripheral locking bolt fails to fix, the redundant push spring column, together with the connecting ground block, can still play a certain auxiliary sealing role to ensure the system's airtightness. The coupling and stabilizing pads set on the side ground blocks can make the side ground blocks fit more tightly with the ground, resulting in a better fixing effect.

[0009] Preferably, a coupling and stabilizing mat is provided on the side plot;

[0010] Preferably, an auxiliary sealing and waterproof adhesive layer is provided on the second closed base;

[0011] Preferably, the first enclosed base is provided with a corrosion-resistant coating;

[0012] Preferably, the second closed base is provided with an annular mounting groove.

[0013] Beneficial effects

[0014] This utility model provides a hydraulic expansion connection mechanism for a heat exchanger and tube sheet. It offers the following advantages: Compared with existing technologies, this hydraulic expansion connection mechanism for a heat exchanger and tube sheet forms a tight, sealed cavity between the heat exchanger pipes and multiple tube sheet branch pipes through a hydraulic expansion connection structure, providing reliable protection for the connection between the heat exchanger and tube sheet. Furthermore, the mechanism employs an auxiliary maintenance elastic structure design, significantly improving the ease of maintenance of internal components. When components age or are damaged, they can be quickly replaced and repaired, effectively reducing maintenance difficulty and time costs. Compared to traditional nut or valve connection structures, this design offers significant advantages in ease of use. It not only achieves a highly efficient and stable connection between the heat exchanger and tube sheet, but its sealing effect also far surpasses that of ordinary products on the market, especially maintaining long-term stable sealing performance under high pressure, high temperature, and alternating hot and cold conditions. Attached Figure Description

[0015] Figure 1 This is a front sectional view of the hydraulic expansion joint mechanism between a heat exchanger and a tube sheet according to the present invention.

[0016] Figure 2This is a side view of the hydraulic expansion joint mechanism between a heat exchanger and a tube sheet according to the present invention.

[0017] Figure 3 for Figure 1 A magnified view of the letter "A" in the diagram.

[0018] In the diagram: 1. First closed base; 2. Second closed base; 3. Outer peripheral locking bolt; 4. Tube sheet branch pipe; 5. Converging cavity; 6. Extension tube; 7. Heat exchanger pipe; 8. Tube wall nesting key; 9. Coupling plastic sealing ring; 10. Side ground key; 11. First ground bolt; 12. Connecting ground block; 13. Redundant push spring column; 14. Side ground block; 15. Second ground bolt. Detailed Implementation

[0019] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] Those skilled in the art should connect all electrical components and their compatible power supplies in this case via wires. Appropriate controllers and encoders should be selected according to the actual situation to meet control requirements. The specific connection and control sequence should refer to the working principle described below, where the electrical components are connected in sequence. The detailed connection methods are well-known in the art. The following mainly introduces the working principle and process, and will not describe the electrical control further.

[0021] Example

[0022] The present invention will now be described in detail with reference to the accompanying drawings, such as... Figure 1-3As shown, a hydraulic expansion joint mechanism for a heat exchanger and tube sheet includes: a first sealing base 1, a second sealing base 2, and a plurality of peripheral locking bolts 3. The plurality of peripheral locking bolts 3 are respectively inserted into the second sealing base 2, and are respectively connected to the first sealing base 1. A hydraulic expansion joint structure is installed on the first sealing base 1, and an auxiliary maintenance elastic structure is installed on the second sealing base 2. The hydraulic expansion joint structure includes: a plurality of tube sheet branch pipes 4, and a collection cavity. 5. Extension tube 6, heat exchanger pipe 7, several pipe wall nesting keys 8, and coupling plastic sealing ring 9; several tube sheet branch pipes 4 are respectively fixedly inserted into the first closed base 1, the collection cavity 5 is installed in the first closed base 1, and the collection cavity 5 is respectively connected to several tube sheet branch pipes 4, the extension tube 6 is inserted into the first closed base 1, and the extension tube 6 is connected to the collection cavity 5, and the extension tube 6 is movably inserted into the heat exchanger pipe 7. The heat exchanger pipe 7 is fixedly inserted into the second closed base 2, and the heat exchanger pipe 7 is movably connected to the coupling plastic sealing ring 9. A gasket mounting groove is provided on the first closed base 1, and the coupling plastic sealing ring 9 is installed on the first closed base 1 through the gasket mounting groove. The coupling plastic sealing ring 9 is fitted onto the outside of the extension tube 6. The auxiliary maintenance elastic structure includes: a pair of side ground keys 10, a pair of first ground bolts 11, a pair of connecting ground blocks 12, a pair of redundant push-position spring columns 13, and a pair of side... The system includes a square ground block 14 and a pair of second ground bolts 15; a pair of side ground keys 10 are respectively installed on the first closed base 1, a pair of first ground bolts 11 are respectively inserted into the pair of side ground keys 10, a pair of connecting ground blocks 12 are respectively installed on the second closed base 2, a pair of redundant push spring columns 13 are respectively connected to the pair of connecting ground blocks 12, a pair of side ground blocks 14 are respectively installed on the pair of redundant push spring columns 13, and a pair of second ground bolts 15 are respectively inserted into the pair of side ground blocks 14.

[0023] According to the appendix Figure 1-3It is concluded that during assembly, the heat exchanger pipe 7 is first inserted and combined with the second sealing base 2. Since the inner surface of the insertion through hole of the second sealing base 2 has multiple annular mounting grooves, expansion equipment such as a pipe expander needs to be used to extend into the heat exchanger pipe 7 in the early stage of assembly to perform tension expansion treatment on the annular mounting grooves of the heat exchanger pipe 7 and the second sealing base 2. After expansion, the pipe wall of the heat exchanger pipe 7 will penetrate deep into and embed into the multiple annular mounting grooves of the second sealing base 2, forming multiple pipe wall nesting keys 8. The first sealing base 1 covers the outside of the collection cavity 5 and multiple tube sheet branch pipes 4, so that the collection cavity 5 and the tube sheet branch pipes 4 together form a complete sealed cavity. Then, the extension tube 6 is inserted into the heat exchanger pipe. Inside the heat exchanger pipe 7, the first sealing base 1 and the second sealing base 2 are connected and fitted together. Finally, multiple peripheral locking bolts 3 are used to complete the locking and sealing. The pipe opening of the heat exchanger pipe 7 is pressed onto the coupling plastic sealing ring 9. After all assembly steps are completed, the heat exchanger pipe 7, the extension tube 6, the main chamber 5, and the multiple tube sheet branch pipes 4 together form a perfect closed passage. This closed passage can not only withstand liquids with high pressure, but also withstand liquids with high temperature, and is not affected by the temperature difference between hot and cold liquids, ensuring that the closed system always remains sealed. More importantly, when the flow rate in the multiple tube sheet branch pipes 4 increases and the pressure of the liquid filling the heat exchanger pipe 7 increases accordingly, the closed passage... The effect is actually better. Furthermore, the strong connection formed by the expansion joint process of the heat exchanger pipe 7 far surpasses the sealing performance and structural strength of the traditional nut-sealing method. The auxiliary sealing and waterproof adhesive layer on the second sealing base 2 makes the connection between the first sealing base 1 and the second sealing base 2 even tighter, further preventing leakage. The corrosion-resistant coating on the first sealing base 1 allows it to operate in harsher environments. During assembly, first insert the knobs of the pair of first ground bolts 11 onto the pair of side ground keys 10. Then adjust the side ground blocks 14 to the appropriate position and screw the corresponding second ground bolts 15 onto them, so that the side ground blocks 14 and side ground keys 10 are stably fixed in the installation position. On the ground, and from both sides, the second closed base 2 and the first closed base 1 are reinforced laterally to ensure structural stability. When emergency maintenance is required, the second closed base 2 can be separated from the first closed base 1 simply by loosening the knobs of the multiple outer peripheral locking bolts 3. At this time, the redundant push spring column 13 can provide a certain displacement margin, which facilitates the disassembly of the second closed base 2 and the quick repair of the multiple components on it. In addition, if the outer peripheral locking bolt 3 fails to fix, the redundant push spring column 13, together with the connecting block 12, can still play a certain auxiliary sealing role to ensure the system's airtightness. The coupling and stabilizing pads set on the side blocks 14 can make the side blocks 14 fit more tightly with the ground, resulting in a better fixing effect.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hydraulic expansion mechanism of a heat exchanger and a tube sheet, comprising: A first closed base, a second closed base, and a plurality of peripheral locking bolts, wherein the plurality of peripheral locking bolts are respectively inserted into the second closed base and respectively connected to the first closed base, wherein a hydraulic expansion connection structure is installed on the first closed base, and an auxiliary maintenance elastic structure is installed on the second closed base, wherein the hydraulic expansion connection structure comprises: a plurality of tube sheet branch pipes, a collection cavity, an extension tube, a heat exchanger pipe, a plurality of tube wall nesting keys, and a coupling plastic sealing ring; A plurality of tube sheet branch pipes are fixedly inserted into the first closed base. The collection cavity is installed inside the first closed base and is connected to the plurality of tube sheet branch pipes. The extension tube is inserted into the first closed base and is connected to the collection cavity. The extension tube is movably inserted into the heat exchanger pipe. The heat exchanger pipe is fixedly inserted into the second closed base and is movably connected to the coupling plastic sealing ring. A gasket mounting groove is provided on the first closed base. The coupling plastic sealing ring is installed on the first closed base through the gasket mounting groove and is fitted onto the outside of the extension tube.

2. A hydraulic expansion joint for a heat exchanger and tube sheet as defined in claim 1, wherein, The auxiliary maintenance elastic structure includes: a pair of side ground keys, a pair of first ground bolts, a pair of connecting ground blocks, a pair of redundant push-position spring columns, a pair of side ground blocks, and a pair of second ground bolts; A pair of side ground keys are respectively installed on the first closed base, a pair of first ground bolts are respectively inserted into the pair of side ground keys, a pair of connecting ground blocks are respectively installed on the second closed base, a pair of redundant push spring columns are respectively connected to the pair of connecting ground blocks, a pair of side ground blocks are respectively installed on the pair of redundant push spring columns, and a pair of second ground bolts are respectively inserted into the pair of side ground blocks.

3. The hydraulic expansion joint mechanism for a heat exchanger and tube sheet according to claim 2, characterized in that, A coupling and stabilizing mat is installed on the side plot.

4. The hydraulic expansion joint mechanism for a heat exchanger and tube sheet according to claim 3, characterized in that, An auxiliary sealing and waterproof adhesive layer is provided on the second closed base.

5. The hydraulic expansion joint mechanism for a heat exchanger and tube sheet according to claim 4, characterized in that, The first enclosed base is provided with a corrosion-resistant coating.

6. The hydraulic expansion joint mechanism for a heat exchanger and tube sheet according to claim 5, characterized in that, The second closed base is provided with an annular mounting groove.

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