Heat exchanger pressing tool

Abstract

The embodiment of the utility model provides a heat exchanger pressing tool, and relates to the technical field of heat exchanger pressure testing. A heat exchanger pressing tool comprises a heat exchanger assembly, a fixed end tool assembly and a floating head end tool assembly. During pressure testing, the flange workpiece is connected to the first barrel flange, so that the flange workpiece presses the fixed end sealing ring, the fixed tube plate and the flange workpiece are sealed, the fixed end is sealed, the floating head end flange is connected to the second barrel flange, the packing sealing barrel is connected to the floating head end flange in a sleeving mode, and the fixed tube plate and the packing sealing barrel are sealed. The connecting sliding flange is inserted into the floating head end flange, the connecting sliding flange extrudes the packing sealing cylinder ring towards the inner side, so that the packing sealing cylinder ring seals a reserved gap between the floating head type tube plate and the floating head end flange, numerous packing accessories do not need to fill the gap little by little, and the operation difficulty of workers is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchanger pressure testing, in particular to a heat exchanger pressure testing tool. Background Art

[0002] The floating head of the floating head heat exchanger consists of a floating tube sheet, a hook ring and a floating head end cover. The tube bundle can be pulled out of the shell. The thermal deformation of the tube bundle and the shell are not constrained by each other, so no thermal stress is generated. The advantage is that the cleaning between and inside the tubes is convenient and no thermal stress is generated. However, its structure is complex and the cost is higher than that of the fixed tube sheet heat exchanger. The equipment is bulky and the material consumption is large. In addition, the small cover at the floating head end cannot be inspected during operation, and high sealing requirements are placed on the manufacturing process.

[0003] A floating-head heat exchanger pressure test fixture, disclosed in prior art publication number CN219301873U, incorporates a graphite sealing gasket between the fixture and the pipe flange. Compared to conventional flange sealing structures, this fixture offers improved sealing performance and reduced leakage rates. It is also easy to install and inexpensive, offering excellent practical value. While implementing this technical solution, the inventors discovered that the prior art suffers from at least the following issues:

[0004] However, in the prior art, when the pressure test tool performs a sealing pressure test on the floating head end, in order to protect the floating end tube sheet and tube bundle from being damaged by collision, a certain gap needs to be reserved for installation. At this time, a large number of filler accessories are needed to fill the gap little by little, which places high demands on the workers' operation. In addition, when facing heat exchangers with the same diameter but different protruding lengths of the floating head end, the filler accessories need to be adjusted, which makes the versatility of the pressure test tool low. Utility Model Content

[0005] The purpose of the utility model is to provide a heat exchanger pressure test tool, which can quickly fill the sealing gap, reduce the operating difficulty of workers, and improve the versatility of the pressure test tool.

[0006] An embodiment of the utility model provides a heat exchanger pressing tool, which includes a heat exchanger assembly, a fixed end tool assembly and a floating head end tool assembly.

[0007] The heat exchanger assembly includes a heat exchanger tube body, a cylinder, a fixed tube sheet and a floating head tube sheet. The heat exchanger tube body is sleeved in the cylinder body. The fixed tube sheet is fixedly connected to one end of the heat exchanger tube body, and the fixed tube sheet is the fixed end. The floating head tube sheet is arranged at the other end of the heat exchanger tube body, and the floating head tube sheet is the floating head end.

[0008] The fixed end tooling assembly includes a first cylinder flange, a flange workpiece, and a fixed end sealing ring. The first cylinder flange is fixedly connected to the peripheral side of the fixed end of the cylinder. The peripheral side of the flange workpiece is fixedly connected to the first cylinder flange. The fixed end sealing ring is sleeved between the flange workpiece and the fixed tube sheet.

[0009] The floating head end tooling assembly includes a second cylinder flange, a floating head end flange, a connecting sliding flange and a packing sealing ring. The second cylinder flange is fixedly connected to the surrounding side of the floating head end of the cylinder, the surrounding side of the floating head end flange is fixedly connected to the second cylinder flange, the connecting sliding flange is fixedly connected to the surrounding side of the floating head end flange, and the packing sealing ring is pressed between the connecting sliding flange and the floating head end flange.

[0010] In a specific embodiment, a connecting sealing ring is sleeved between the fixed tube sheet and the side of the cylinder, another connecting sealing ring is sleeved around the floating head tube sheet, and the floating head end flange presses the connecting sealing ring against the side of the cylinder.

[0011] In a specific embodiment, the first cylinder flange and the flange workpiece, the second cylinder flange and the floating head end flange, and the floating head end flange and the connecting sliding flange are all fixed by bolts.

[0012] In a specific embodiment, the flange workpiece includes a flange workpiece body and a connecting workpiece, the connecting workpiece is fixedly connected to the side of the flange workpiece body, the fixed end sealing ring is pressed between the connecting workpiece and the fixed tube sheet, and bolt openings are provided around the flange workpiece body.

[0013] In a specific embodiment, the floating head end flange includes a floating head flange body, a connecting tube and a fixed flange, one end of the connecting tube is fixedly connected to the floating head flange body, the other end of the connecting tube is fixedly connected to the fixed flange, the floating head flange body is fixedly connected to the second cylinder flange by bolts, and the fixed flange is fixedly connected to the connecting sliding flange by the bolts.

[0014] In a specific embodiment, the connecting sliding flange includes a connecting flange body and a sliding poke ring, and the sliding poke ring is fixedly connected to the connecting flange body.

[0015] In a specific embodiment, a trapezoidal groove is formed on the inner side of the floating head flange body.

[0016] In a specific embodiment, the end of the sliding poke ring is an oblique end and corresponds to the inclined surface of the trapezoidal groove.

[0017] In a specific embodiment, the cross section of the packing sealing ring is a trapezoidal structure, and the inclined surfaces at both ends of the trapezoidal structure correspond to the end of the sliding stamping ring and the inclined surfaces of the trapezoidal groove.

[0018] In a specific embodiment, a pressure detection valve port and an air pressure input valve are respectively provided at the upper and lower ends of the cylinder.

[0019] The embodiment of the utility model provides a heat exchanger pressure test tool with beneficial effects: during the pressure test, the flange workpiece is connected to the first cylinder flange, so that the flange workpiece presses the fixed end sealing ring, so that the fixed tube sheet and the flange workpiece are sealed, thereby making the fixed end sealed, and the floating head end flange is connected to the second cylinder flange, the packing sealing ring is sleeved on the floating head end flange, and the connecting sliding flange is inserted into the floating head end flange, and the connecting sliding flange squeezes the packing sealing ring inward, so that the packing sealing ring seals the reserved gap between the floating head tube sheet and the floating head end flange, thereby eliminating the need for a large number of packing accessories to fill the gap little by little, reducing the difficulty of operation for workers, and by adjusting the thickness of the packing sealing ring, the gap filling requirements for different floating head end extension lengths can be met, thereby improving the versatility of the pressure test tool, and solving the problems of the prior art that a small amount of filling auxiliary materials are required to meet the sealing requirements, the high operation requirements for workers and the insufficient versatility of the pressure test tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 This is a structural schematic diagram of a heat exchanger pressing tooling according to an embodiment of the present utility model.

[0022] Figure 2 This is a cross-sectional view of a heat exchanger pressing tool according to an embodiment of the present utility model.

[0023] Figure 3 This is a schematic structural diagram of a flange workpiece according to an embodiment of the present invention.

[0024] Figure 4 This is a schematic structural diagram of the floating head end flange according to an embodiment of the present invention.

[0025] Figure 5 This is a schematic structural diagram of a trapezoidal groove in an embodiment of the present utility model.

[0026] Icons: 100-heat exchanger assembly; 110-heat exchanger tube body; 120-cylinder body; 130-fixed tube sheet; 140-floating head tube sheet; 150-connecting sealing ring; 160-pressure detection valve port; 170-input pressure valve; 200-fixed end tooling assembly; 210-first cylinder flange; 220-flange workpiece; 221-flange workpiece body; 222-connecting workpiece; 230-fixed end sealing ring; 300-floating head end tooling assembly; 310-second cylinder flange; 320-floating head end flange; 321-floating head flange body; 322-connecting cylinder; 323-fixed flange; 324-trapezoidal groove; 330-connecting sliding flange; 331-connecting flange body; 332-sliding stamp ring; 340-packing sealing cylinder ring; DETAILED DESCRIPTION

[0027] In the prior art, when performing a seal pressure test on the floating head end, a certain gap must be reserved for installation to protect the floating end tube sheet and tube bundle from damage. This requires the use of numerous filler accessories to gradually fill the gap, placing high demands on the operator. Furthermore, when working with heat exchangers of the same diameter but with different extension lengths of the floating head end, the filler accessories must be adjusted, reducing the versatility of the pressure test tool. Therefore, the inventors have developed a heat exchanger pressure test tool that can quickly fill the sealing gap, reduce operator difficulty, and improve the versatility of the pressure test tool.

[0028] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0029] Please refer to Figure 1 An embodiment of the present invention provides a heat exchanger pressing tool, including a heat exchanger assembly 100, a fixed end tooling assembly 200 and a floating head end tooling assembly 300.

[0030] Please refer to Figure 2The heat exchanger assembly 100 includes a heat exchanger tube body 110, a cylinder 120, a fixed tube sheet 130 and a floating head tube sheet 140. The heat exchanger tube body 110 is sleeved in the cylinder 120, and the fixed tube sheet 130 is fixedly connected to one end of the heat exchanger tube body 110, and the fixed tube sheet 130 is a fixed end. The floating head tube sheet 140 is arranged at the other end of the heat exchanger tube body 110, and the floating head tube sheet 140 is a floating head end; the fixed end tooling assembly 200 includes a first cylinder flange 210, a flange workpiece 220 and a fixed end sealing ring 230. The first cylinder flange 210 is fixedly connected to the surrounding side of the fixed end of the cylinder 120, and the surrounding of the flange workpiece 220 is fixed to the surrounding of the fixed end of the cylinder 120. The surrounding side is fixedly connected to the first cylinder flange 210, and the fixed end sealing ring 230 is sleeved between the flange workpiece 220 and the fixed tube sheet 130; the floating head end tooling assembly 300 includes a second cylinder flange 310, a floating head end flange 320, a connecting sliding flange 330 and a packing sealing ring 340, the second cylinder flange 310 is fixedly connected to the surrounding side at the floating head end of the cylinder 120, the surrounding side of the floating head end flange 320 is fixedly connected to the second cylinder flange 310, the connecting sliding flange 330 is fixedly connected to the surrounding side of the floating head end flange 320, and the packing sealing ring 340 is pressed between the connecting sliding flange 330 and the floating head end flange 320. During the pressure test, the flange workpiece 220 is connected to the first cylinder flange 210, so that the flange workpiece 220 presses the fixed end sealing ring 230, so that the fixed tube sheet 130 and the flange workpiece 220 are sealed, thereby sealing the fixed end. The floating head end flange 320 is connected to the second cylinder flange 310, and the packing sealing ring 340 is sleeved on the floating head end flange 320. Then, the connecting sliding flange 330 is inserted into the floating head end flange 320, and the connecting sliding flange 330 presses the packing sealing ring inward. 340, so that the packing seal ring 340 seals the reserved gap between the floating head tube sheet 140 and the floating head end flange 320. This eliminates the need for numerous packing accessories to fill the gap piece by piece, reducing the difficulty for workers. By adjusting the thickness of the packing seal ring 340, the gap filling requirements for different floating head extension lengths can be met, improving the versatility of the pressure test tooling and resolving the problems of the existing technology that require only a small amount of packing materials to achieve the sealing requirements, which requires high worker operation requirements and lacks the versatility of the pressure test tooling. The first cylinder flange 210 and the flange workpiece 220, the second cylinder flange 310 and the floating head end flange 320, and the floating head end flange 320 and the connecting sliding flange 330 are all secured by bolts. Bolting facilitates disassembly and installation.

[0031] Please refer to Figure 3The upper and lower ends of the cylinder 120 are respectively provided with a detection air pressure valve port 160 and an input air pressure valve 170. The detection air pressure valve port 160 is used to install a pressure gauge to observe the pressure inside the device, and the input air pressure valve 170 is used to input pressure for pressurization. The flange workpiece 220 includes a flange workpiece body 221 and a connecting workpiece 222. The connecting workpiece 222 is fixedly connected to the side of the flange workpiece body 221. The fixed end sealing ring 230 is pressed between the connecting workpiece 222 and the fixed tube sheet 130. Bolt openings are provided on the surrounding side of the flange workpiece body 221. After the flange workpiece body 221 is connected to the cylinder 120, the connecting workpiece 222 presses the fixed end sealing ring 230 against the fixed tube sheet 130, thereby achieving sealing of the fixed end.

[0032] Please refer to Figure 4 The floating end flange 320 includes a floating flange body 321, a connecting sleeve 322, and a fixed flange 323. One end of the connecting sleeve 322 is fixedly connected to the floating flange body 321, and the other end is fixedly connected to the fixed flange 323. The floating flange body 321 is bolted to the second cylinder flange 310, and the fixed flange 323 is bolted to the connecting sliding flange 330. After the floating flange body 321 is connected to the cylinder 120, the connecting sealing ring 150 is compressed, thereby sealing the floating tube sheet 140 and the cylinder 120. The connecting sliding flange 330 includes a connecting flange body 331 and a sliding stamping ring 332, which is fixedly connected to the connecting flange body 331. Inserting the sliding stamping ring 332 into the floating flange body 321 squeezes the packing seal ring 340, thereby sealing the reserved gap between the floating tube sheet 140 and the floating end flange 320.

[0033] Please refer to Figure 3 and Figure 4 A connecting seal ring 150 is sleeved between the fixed tube sheet 130 and the side of the cylinder 120. Another connecting seal ring 150 is sleeved around the side of the floating head tube sheet 140. The floating head end flange 320 presses the connecting seal ring 150 against the side of the cylinder 120. The connecting seal ring 150 is used to seal the gaps between the fixed tube sheet 130 and the cylinder 120, and between the floating head tube sheet 140 and the cylinder 120, improving the sealing performance during the pressure test.

[0034] Please refer to Figure 5A trapezoidal groove 324 is provided on the inner side of the floating head flange body 321. The trapezoidal groove 324 is used to accommodate the packing seal ring 340. The end of the sliding stamping ring 332 is an oblique end, and corresponds to the inclined surface of the trapezoidal groove 324. The cross-section of the packing seal ring 340 is a trapezoidal structure, and the inclined surfaces at both ends of the trapezoidal structure correspond to the end of the sliding stamping ring 332 and the inclined surface of the trapezoidal groove 324. When the sliding stamping ring 332 is inserted into the floating head flange body 321, the sliding stamping ring 332 and the inclined surface of the trapezoidal groove 324 squeeze the packing seal ring 340, causing the packing seal ring 340 to shrink toward the inner circle, thereby quickly sealing the reserved gap between the floating head tube sheet 140 and the floating head end flange 320.

[0035] In summary, the working principle of a heat exchanger pressure test tool of the embodiment of the present invention is as follows: during the pressure test, the flange workpiece body 221 is connected to the first cylinder flange 210, so that the connection workpiece 222 presses the fixed end sealing ring 230, so that the fixed tube sheet 130 and the flange workpiece 220 are sealed, thereby sealing the fixed end, and the floating head flange body 321 is connected to the second cylinder flange 310, the packing sealing cylinder ring 340 is sleeved in the trapezoidal groove 324, and the sliding stamping ring 332 is inserted into the trapezoidal groove 324, and the sliding stamping ring 332 is pressed against the fixed end sealing ring 230. The packing seal ring 340 is squeezed inward, so that the packing seal ring 340 seals the reserved gap between the floating head tube sheet 140 and the floating head flange body 321. This eliminates the need for numerous packing accessories to fill the gap little by little, thereby reducing the difficulty of operation for workers. Moreover, by adjusting the thickness of the packing seal ring 340, the gap filling requirements for different floating head end extension lengths can be met, thereby improving the versatility of the pressure test tooling and solving the problems of the prior art that a small amount of filling auxiliary materials is required to achieve the sealing requirement, which places high demands on workers and the lack of versatility of the pressure test tooling.

[0036] It is important to note that the construction and arrangement of the present application shown in a number of different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values (e.g., temperature, pressure, etc.), mounting arrangements, use of materials, colors, directional changes, etc.) without departing substantially from the novel teachings and advantages of the subject matter described in this application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature or number or position of the discrete elements may be altered or changed. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "means plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also an equivalent structure. Without departing from the scope of the present invention, other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0037] Additionally, in order to provide a concise description of example embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0038] It will be appreciated that in the development of any actual embodiment, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will, for those of ordinary skill having the benefit of this disclosure, be a routine undertaking of design, fabrication, and production without undue experimentation.

[0039] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, and all of these should be included in the scope of the claims of the present invention.

Claims

1. A heat exchanger press tool, characterized in that: include A heat exchanger assembly (100), the heat exchanger assembly (100) comprising a heat exchanger tube body (110), a cylinder (120), a fixed tube sheet (130) and a floating head tube sheet (140), wherein the heat exchanger tube body (110) is sleeved in the cylinder (120), the fixed tube sheet (130) is fixedly connected to one end of the heat exchanger tube body (110), the fixed tube sheet (130) being the fixed end, and the floating head tube sheet (140) is arranged at the other end of the heat exchanger tube body (110), the floating head tube sheet (140) being the floating head end; A fixed end tooling assembly (200), the fixed end tooling assembly (200) comprising a first cylinder flange (210), a flange workpiece (220) and a fixed end sealing ring (230), wherein the first cylinder flange (210) is fixedly connected to the peripheral side of the fixed end of the cylinder (120), the peripheral side of the flange workpiece (220) is fixedly connected to the first cylinder flange (210), and the fixed end sealing ring (230) is sleeved between the flange workpiece (220) and the fixed tube sheet (130); A floating head end tooling assembly (300) is provided, wherein the floating head end tooling assembly (300) comprises a second cylinder flange (310), a floating head end flange (320), a connecting sliding flange (330) and a packing sealing ring (340); the second cylinder flange (310) is fixedly connected to the peripheral side of the floating head end of the cylinder (120); the peripheral side of the floating head end flange (320) is fixedly connected to the second cylinder flange (310); the connecting sliding flange (330) is fixedly connected to the peripheral side of the floating head end flange (320); and the packing sealing ring (340) is pressed between the connecting sliding flange (330) and the floating head end flange (320).

2. A heat exchanger press tool according to claim 1, characterized in that: A connecting seal ring (150) is sleeved between the fixed tube sheet (130) and the side surface of the cylinder (120), another connecting seal ring (150) is sleeved around the surrounding side of the floating head tube sheet (140), and the floating head end flange (320) presses the connecting seal ring (150) against the side surface of the cylinder (120).

3. The heat exchanger press tool according to claim 1, characterized in that: The first cylinder flange (210) and the flange workpiece (220), the second cylinder flange (310) and the floating head end flange (320), and the floating head end flange (320) and the connecting sliding flange (330) are all fixed by bolts.

4. The heat exchanger press tool according to claim 1, characterized in that: The flange workpiece (220) comprises a flange workpiece body (221) and a connecting workpiece (222). The connecting workpiece (222) is fixedly connected to the side of the flange workpiece body (221). The fixed end sealing ring (230) is pressed between the connecting workpiece (222) and the fixed tube sheet (130). Bolt openings are provided around the flange workpiece body (221).

5. The heat exchanger press tool according to claim 1, characterized in that: The floating head end flange (320) includes a floating head flange body (321), a connecting tube (322) and a fixed flange (323). One end of the connecting tube (322) is fixedly connected to the floating head flange body (321), and the other end of the connecting tube (322) is fixedly connected to the fixed flange (323). The floating head flange body (321) is fixedly connected to the second cylinder flange (310) by bolts, and the fixed flange (323) is fixedly connected to the connecting sliding flange (330) by the bolts.

6. A heat exchanger press tool according to claim 5, characterized in that: The connecting sliding flange (330) comprises a connecting flange body (331) and a sliding stamping ring (332), and the sliding stamping ring (332) is fixedly connected to the connecting flange body (331).

7. A heat exchanger press tool according to claim 6, characterized in that: A trapezoidal groove (324) is formed inside the floating head flange body (321).

8. The heat exchanger pressing tool according to claim 7, characterized in that: The end of the sliding poking ring (332) is an oblique end and corresponds to the oblique surface of the trapezoidal groove (324).

9. The heat exchanger press tool according to claim 8, characterized in that: The cross section of the packing sealing ring (340) is a trapezoidal structure, and the inclined surfaces at both ends of the trapezoidal structure correspond to the end of the sliding stamping ring (332) and the inclined surface of the trapezoidal groove (324).

10. The heat exchanger press tool according to claim 1, characterized in that: The upper and lower ends of the cylinder (120) are respectively provided with a detection air pressure valve port (160) and an input air pressure valve (170).

Images