Elastic compensation structure for fluoroplastic GGH heat exchanger

Abstract

The utility model belongs to the technical field of heat exchangers, and particularly relates to an elastic compensation structure for a fluoroplastic GGH heat exchanger. The elastic compensation structure comprises a fixed connecting rod unit used for connecting a shell and a header pipe, a limiting pore plate unit arranged on a heat exchange pipe end plate and connected with the fixed connecting rod unit in a sleeved mode, and an elastic connecting pipe unit with one end connected with the limiting pore plate unit and the other end connected with the header pipe. The heat exchange tube end plate at least has the beneficial effects that the elastic sealing connection effect of a foundation is achieved, the application range is relatively large, and particularly, the specific shape and size of the heat exchange tube end plate are not greatly limited.

Description

Technical Field

[0001] This application belongs to the field of heat exchanger technology, and in particular relates to an elastic compensation structure for a fluoroplastic GGH heat exchanger. Background Technology

[0002] A fluoroplastic GGH heat exchanger refers to a gas-to-gas heat exchanger whose main heat exchanger is a fluoroplastic flexible tube. The aforementioned elastic compensation structure is generally installed at one end of the fluoroplastic flexible tube to match the relatively large thermal expansion coefficient of fluoroplastics, making the fluoroplastic flexible tube less prone to compression cracking or tensile breakage between it and the main pipe.

[0003] The core component of the commonly used elastic compensation structure is a pre-bent connecting plate, which ensures that the fluoroplastic hose and the main pipe are always connected, while allowing the fluoroplastic hose to extend and shorten.

[0004] For example, Chinese utility model patent with authorization announcement number CN208547283U and authorization announcement date of February 26, 2019, discloses a bottom double-layer flexible compensator for a gas-to-gas fluoroplastic heat exchanger. Its structure mainly includes: shell, heat exchange tube, tube sheet, expansion compensator, diameter reducing head, protrusion, and guide rod.

[0005] The bottom double-layer flexible compensator in this utility model patent has the following advantages: it effectively avoids the expansion and deformation of the heat exchange tube and ensures the sealing of the structure during the process.

[0006] However, when this bottom double-layer flexible compensator is used normally in common application areas such as flue gas desulfurization systems in thermal power plants and selective catalytic reduction systems, it still has at least the following impractical problems, specifically manifested as follows:

[0007] This flexible compensator is not suitable for existing common and relatively simple fluoroplastic heat exchange tubes. The heat exchanger it is compatible with must be an integral part of the expansion compensator, protrusions, and other structures, thus limiting its applicability. Utility Model Content

[0008] This application provides an elastic compensation structure for a fluoroplastic GGH heat exchanger. The technical problem to be solved is how to make the elastic compensation structure have the dual advantages of effective basic functions and a relatively wide range of applications.

[0009] The technical solution adopted by this application to solve the above problems is: an elastic compensation structure for a fluoroplastic GGH heat exchanger, including a fixed connecting rod unit for connecting the outer shell and the main pipe, a limiting hole plate unit disposed on the heat exchange tube end plate and sleeved with the fixed connecting rod unit, and an elastic connecting pipe unit with one end connected to the limiting hole plate unit and the other end connected to the main pipe.

[0010] A further preferred technical solution includes an elastic connecting piece unit that is connected at one end to the limiting hole plate unit and at the other end to the outer shell.

[0011] A further preferred technical solution is that the fixed connecting rod unit includes two L-shaped connecting plates respectively disposed on the outer shell and the main pipe, and a limiting rod disposed on the two L-shaped connecting plates and used to insert the limiting hole plate unit.

[0012] A further preferred technical solution is that the number of fixed linkage units is 3 or 4.

[0013] A further preferred technical solution is that the limiting hole plate unit includes a plate body for connecting the elastic connecting pipe unit, a transverse limiting hole disposed on the plate body for passing through the limiting rod, and an installation groove disposed on the side of the plate body for inserting the heat exchange tube end plate.

[0014] A further preferred technical solution is that the elastic connecting pipe unit includes an elastic pipe body that bends radially inward or outward, and two connecting rings respectively disposed at both ends of the elastic pipe body for connecting the plate body and the main pipe.

[0015] A further preferred technical solution is that the elastic connecting pipe unit further includes an inner liner ring disposed on one of the connecting rings and used to insert and connect the main pipe.

[0016] A further preferred technical solution is that the elastic connecting piece unit includes an arc-shaped piece, and two mounting plates respectively disposed at both ends of the arc-shaped piece for connecting the limiting hole plate unit and the outer shell.

[0017] A further preferred technical solution is that the limiting hole plate unit further includes bolt holes disposed on the plate body, passing through the mounting groove, and used to connect the elastic connecting pipe unit and the heat exchange pipe end plate.

[0018] A further preferred technical solution is that the elastic connecting piece unit further includes a beveled surface disposed on the mounting plate and used to guide the mounting plate into the mounting groove.

[0019] The beneficial effects of this application include at least the following three points.

[0020] First, this elastic compensation structure combines the basic elastic sealing connection effect with the advantage of a relatively wide range of applications, especially since it does not impose significant restrictions on the specific shape and size of the heat exchange tube end plate.

[0021] Secondly, both the fluoroplastic heat exchange tube and the elastic compensation structure can be replaced independently, greatly reducing replacement costs.

[0022] Third, the installation and use of this elastic compensation structure are relatively flexible and versatile, suitable for various heat exchange scenarios, further enhancing the practicality of the entire fluoroplastic GGH heat exchanger. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this application.

[0024] Figure 2 This is a schematic diagram illustrating how this application is used.

[0025] Figure 3 This is a schematic diagram of a fluoroplastic heat exchange tube in the prior art.

[0026] Figure 4 This is a schematic diagram of one shape of a manifold in the prior art.

[0027] Figure 5 This is a schematic diagram of one shape of the outer casing in the prior art.

[0028] Figure 6 This is a schematic diagram of the structure of the flexible connecting pipe unit in this application.

[0029] Figure 7 This is a schematic diagram of the structure of the elastic connecting piece unit in this application.

[0030] Figure 8 This is a schematic diagram of the limiting orifice plate unit in this application.

[0031] Figure 9 This is a structural schematic diagram of the fixed linkage unit in this application.

[0032] Figure 10 This is a schematic diagram of one connection method for the limiting orifice plate unit in this application.

[0033] The meanings of the markings in the diagram are as follows.

[0034] a) Outer shell; b) Main pipe; c) Heat exchanger tube end plate; d) Fluoroplastic tube body; e) Mounting hole;

[0035] Fixed connecting rod unit 1, limiting hole plate unit 2, elastic connecting tube unit 3, elastic connecting piece unit 4;

[0036] L-shaped connecting plate 101, limiting rod 102, screw connector 103;

[0037] Plate 201, transverse limiting hole 202, mounting groove 203, bolt hole 204;

[0038] Elastic tube body 301, connecting ring 302, inner lining ring 303;

[0039] Arc-shaped piece 401, mounting plate 402, beveled surface 403, inner lining plate 404. Detailed Implementation

[0040] The following description is merely a preferred embodiment of this application and is not intended to limit the scope of this application.

[0041] like Figures 1-10 As shown, an elastic compensation structure for a fluoroplastic GGH heat exchanger includes a fixed connecting rod unit 1 for connecting the outer shell a and the main pipe b, a limiting hole plate unit 2 disposed on the heat exchange tube end plate c and sleeved with the fixed connecting rod unit 1, and an elastic connecting pipe unit 3 connected at one end to the limiting hole plate unit 2 and at the other end to the main pipe b.

[0042] In this embodiment, the term "elastic" in the elastic compensation structure refers to the elastic deformation function of the elastic connecting tube unit 3 in its length direction, which allows its actual length to be passively changed for applicability.

[0043] The term "compensation" refers to the fact that when the fluoroplastic heat exchange tube, which has obvious thermal expansion and contraction characteristics, elongates when heated, the elastic connecting tube unit 3 can be passively shortened, thereby achieving a "negative compensation" effect in length. This makes it less likely that the fluoroplastic heat exchange tube and the main pipe b will be excessively compressed, otherwise both are prone to breakage.

[0044] Correspondingly, the fluoroplastic heat exchange tube shortens relatively after cooling. At this time, the elastic connecting tube unit 3 can be passively extended, thereby achieving a "positive compensation" effect in length, making it difficult for the fluoroplastic heat exchange tube and the main pipe b to be excessively stretched. Otherwise, both are prone to breakage or detachment at the connection.

[0045] The outer shell a is made of stainless steel, and the main pipe b is made of fluoroplastic. It is generally a variable diameter type, with the "larger end" connecting to the fluoroplastic heat exchange tube. The heat exchange tube end plates c at each end and the multiple fluoroplastic tubes d arranged side by side in the middle are combined to form a complete fluoroplastic heat exchange tube product.

[0046] Furthermore, the fixed linkage unit 1 functions at least as follows: reinforcing the main pipe b; and providing a limiting function for the reciprocating movement of the limiting orifice plate unit 2. The function and characteristics of the limiting orifice plate unit 2 are:

[0047] It can only slide linearly back and forth on the fixed linkage unit 1, thereby avoiding unnecessary twisting and skewing of the fluoroplastic heat exchange tube when it expands and contracts with temperature.

[0048] The heat exchange tube end plate c is movably connected, allowing the fluoroplastic heat exchange tubes, which have a relatively short replacement cycle, to be replaced individually.

[0049] Within a certain range, the heat exchange tube end plate c and the elastic connecting tube unit 3 can be adapted to various shapes and sizes, greatly improving the practicality of the elastic compensation structure.

[0050] Typically, this fluoroplastic GGH heat exchanger is vertical.

[0051] The elastic compensation structure also includes an elastic connecting piece unit 4, which is connected at one end to the limiting hole plate unit 2 and at the other end to the outer shell a.

[0052] In this embodiment, the elastic connecting tube unit 3 has two main functions: first, to provide sufficient and suitable elastic expansion and contraction along its length; and second, to seal the connection between the fluoroplastic heat exchange tube and the main pipe b. The elastic connecting piece unit 4 primarily serves the first function mentioned above.

[0053] Therefore, the elastic connecting tube unit 3 is generally tubular in shape and there is one of it. The elastic connecting sheet unit 4 is generally sheet-shaped, and the multiple sheet-shaped structures are independent of each other, with a quantity of, for example, 3-4.

[0054] On the other hand, the elastic connecting tube unit 3 will come into contact with the material being exchanged during normal use, but the elastic connecting sheet unit 4 will not. Therefore, the material of the elastic connecting tube unit 3 is a corrosion-resistant elastic material, such as various chemically stable elastic resins, while the material of the elastic connecting sheet unit 4 can be various common elastic steel sheets.

[0055] Finally, when the elastic connecting tube unit 3 and the elastic connecting piece unit 4 are used together, there is no restriction on the relative magnitude of their respective elastic strengths. The elastic connecting tube unit 3 and the elastic connecting piece unit 4 can be selected as the main elastic compensation position.

[0056] The fixed connecting rod unit 1 includes two L-shaped connecting plates 101 respectively disposed on the outer shell a and the main pipe b, and a limiting rod 102 disposed on the two L-shaped connecting plates 101 and used to insert the limiting hole plate unit 2.

[0057] In this embodiment, the fixed connecting rod unit 1 is integrally formed and made of stainless steel. The L-shaped connecting plate 101 is provided with mounting holes and can be used with the screw connector 103. The screw connector 103 generally refers to a stud and nut combination, wherein the stud needs to be pre-fixed on the outer shell a and the main pipe b.

[0058] Furthermore, the cross-sectional shape of the limiting rod 102 is square or circular.

[0059] The number of fixed linkage units 1 is 3 or 4.

[0060] In this embodiment, the outline cross-sectional shape of the outer shell a is square or circular, and the fixed connecting rod unit 1 is evenly spaced on the outer shell a.

[0061] For example, when the outline cross-sectional shape of the outer shell a is square, the four fixed linkage units 1 are respectively arranged on its four vertical sides.

[0062] The limiting plate unit 2 includes a plate body 201 for connecting the elastic connecting pipe unit 3, a transverse limiting hole 202 disposed on the plate body 201 for passing through the limiting rod 102, and a mounting groove 203 disposed on the side of the plate body 201 for inserting the heat exchange tube end plate c.

[0063] In this embodiment, the plate 201 is rectangular in shape, and its position and number correspond one-to-one with the limiting rods 102. The heat exchange tube end plate c is inserted into the mounting groove 203, so that the fluoroplastic heat exchange tube can indirectly obtain a safe and linear reciprocating sliding effect on the limiting rods 102, avoiding harmful twisting, skewing and other phenomena when it expands and contracts with heat.

[0064] The elastic connecting pipe unit 3 includes an elastic pipe body 301 that bends radially inward or outward, and two connecting rings 302 respectively disposed at both ends of the elastic pipe body 301 for connecting the plate body 201 and the main pipe b.

[0065] In this embodiment, the elastic tube 301 can be shaped as either "thick at both ends and thin in the middle" or "thin at both ends and thick in the middle". Both of these methods can achieve sufficient and appropriate length-direction expansion and contraction functions.

[0066] One of the connecting rings 302 is used to screw the main pipe b, while the other connecting ring 302 is used to insert and / or screw the limiting hole plate unit 2.

[0067] The elastic connecting pipe unit 3 also includes an inner liner ring 303 disposed on one of the connecting rings 302 and used for inserting and connecting the main pipe b.

[0068] In this embodiment, the inner liner ring 303 primarily provides a new method for connecting the elastic connecting pipe unit 3 and the main pipe b. When the end face size of the main pipe b is relatively large, the connecting ring 302 is screwed to the end face. When the end face size is relatively small, the inner liner ring 303 is screwed or welded to the inner ring surface of the main pipe b, ultimately increasing the applicability of the elastic connecting pipe unit 3.

[0069] The elastic connecting piece unit 4 includes an arc-shaped piece 401 and two mounting plates 402 respectively disposed at both ends of the arc-shaped piece 401 and used to connect the limiting hole plate unit 2 and the outer shell a.

[0070] In this embodiment, the bending direction of the arc-shaped piece 401 can be either radially inward or outward, and the main installation method of the mounting plate 402 is screw connection, so it is provided with openings.

[0071] The limiting hole plate unit 2 also includes bolt holes 204 disposed on the plate body 201, passing through the mounting groove 203, and used to connect the elastic connecting pipe unit 3 and the heat exchange pipe end plate c.

[0072] In this embodiment, when the bolt hole 204 is not provided, the connecting ring 302 and the mounting plate 402 are generally connected to the limiting hole plate unit 2 by inserting both of them into the mounting groove 203. This also achieves the elastic compensation effect for the fluoroplastic heat exchange tube. This method is convenient for disassembly and assembly, but the connection strength is generally average.

[0073] When the bolt hole 204 is opened, the plate 201, heat exchange tube end plate c, connecting ring 302, and mounting plate 402 can all be screwed together with a single bolt and nut, thereby achieving sufficient connection strength. See the attached document for details. Figure 10 .

[0074] It should be noted that the above screw connection method and insertion method are not contradictory; both are referred to in the appendix. Figure 10 The mounting plate 402 can still be inserted into the mounting groove 203 at this time, thereby matching the relatively thin heat exchange tube end plate c. This can greatly improve the practicality of the entire elastic compensation structure, that is, the heat exchange tube end plate c, whether thick or thin, can be used with this elastic compensation structure.

[0075] The elastic connecting piece unit 4 also includes a chamfered surface 403 disposed on the mounting plate 402 and used to guide the mounting plate 402 into the mounting groove 203.

[0076] In this embodiment, the connecting ring 302 can also be provided with a beveled surface that has a similar principle and function to the beveled surface 403, so that the connecting ring 302 can be inserted into the mounting groove 203 with relatively little effort and convenience.

[0077] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various modifications can be made without departing from the spirit of this application. These are non-inventive modifications and are protected by patent law as long as they are within the scope of the claims of this application.

Claims

1. An elastic compensation structure for a fluoroplastic GGH heat exchanger, characterized in that: It includes a fixed connecting rod unit (1) for connecting the outer shell (a) and the main pipe (b), a limiting hole plate unit (2) disposed on the heat exchange tube end plate (c) and sleeved with the fixed connecting rod unit (1), and an elastic connecting pipe unit (3) connected at one end to the limiting hole plate unit (2) and at the other end to the main pipe (b).

2. The elastic compensation structure for a fluoroplastic GGH heat exchanger according to claim 1, characterized in that: It also includes an elastic connecting piece unit (4) that is connected at one end to the limiting hole plate unit (2) and at the other end to the outer shell (a).

3. The elastic compensation structure for a fluoroplastic GGH heat exchanger according to claim 2, characterized in that: The fixed linkage unit (1) includes two L-shaped connecting plates (101) respectively disposed on the outer shell (a) and the main pipe (b), and a limiting rod (102) disposed on the two L-shaped connecting plates (101) and used to insert the limiting hole plate unit (2).

4. The elastic compensation structure for a fluoroplastic GGH heat exchanger according to claim 1, characterized in that: The number of fixed linkage units (1) is 3 or 4.

5. The elastic compensation structure for a fluoroplastic GGH heat exchanger according to claim 3, characterized in that: The limiting hole plate unit (2) includes a plate body (201) for connecting the elastic connecting pipe unit (3), a transverse limiting hole (202) disposed on the plate body (201) for passing through the limiting rod (102), and an installation groove (203) disposed on the side of the plate body (201) for inserting the heat exchange tube end plate (c).

6. The elastic compensation structure for a fluoroplastic GGH heat exchanger according to claim 5, characterized in that: The elastic connecting tube unit (3) includes an elastic tube body (301) that bends inward or outward in the radial direction, and two connecting rings (302) respectively disposed at both ends of the elastic tube body (301) for connecting the plate body (201) and the main pipe (b).

7. The elastic compensation structure for a fluoroplastic GGH heat exchanger according to claim 6, characterized in that: The flexible connecting pipe unit (3) further includes an inner liner ring (303) disposed on one of the connecting rings (302) and used for inserting into the main pipe (b).

8. The elastic compensation structure for a fluoroplastic GGH heat exchanger according to claim 5, characterized in that: The elastic connecting piece unit (4) includes an arc-shaped piece (401) and two mounting plates (402) respectively disposed at both ends of the arc-shaped piece (401) and used to connect the limiting hole plate unit (2) and the outer shell (a).

9. The elastic compensation structure for a fluoroplastic GGH heat exchanger according to claim 5, characterized in that: The limiting hole plate unit (2) also includes bolt holes (204) disposed on the plate body (201), passing through the mounting groove (203), and used to connect the elastic connecting pipe unit (3) and the heat exchange pipe end plate (c).

10. The elastic compensation structure for a fluoroplastic GGH heat exchanger according to claim 8, characterized in that: The elastic connecting piece unit (4) further includes a chamfered surface (403) disposed on the mounting plate (402) and used to guide the mounting plate (402) into the mounting groove (203).

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