Automatic adjusting melting device for tube plate and tube bundle of fluorine material heat exchanger

Abstract

This invention relates to the technical field of fluorine material heat exchanger processing equipment, and provides an automatic adjustment and melting device for fluorine material heat exchanger tube sheets and tube bundles. The device includes a PLC-controlled warm air circulation furnace, a tube sheet, a tube bundle, and a fixing mechanism. The tube sheet is placed at the bottom center of the cavity inside the PLC-controlled warm air circulation furnace, and a through hole is provided at the bottom of the furnace. In this solution, by setting up the PLC-controlled warm air circulation furnace and the fixing mechanism, the PLC-controlled warm air circulation furnace provides a uniform and stable high-temperature sintering environment. Combined with the fixing mechanism, precise positioning and automatic adjustment melting are achieved. The automatic expansion adjustment mechanism is located inside the tube bundle and can adaptively eliminate the assembly gap between the tube sheet and the tube bundle, ensuring full contact and reliable pre-tightening at the melting interface, significantly improving the welding depth and connection strength. The automatic adjustment clamping mechanism can automatically constrain the high-temperature expansion deformation of the tube sheet according to temperature changes, making the welding process uniform and controllable, effectively avoiding local overheating or insufficient welding, and greatly improving product sealing.

Description

Technical Field

[0001] This invention belongs to the technical field of fluorine material heat exchanger processing equipment, and particularly relates to an automatic adjustment and melting device for fluorine material heat exchanger tube sheets and tube bundles. Background Technology

[0002] Fluorine heat exchangers use fluorine-containing polymers such as polytetrafluoroethylene (PTFE) and soluble PTFE as core components. They possess excellent resistance to strong acid and alkali corrosion, high temperature resistance, low precipitation, and high cleanliness. They are indispensable key heat exchange equipment in high-end electronics manufacturing, biopharmaceuticals, and wet electronic chemical production processes. In scenarios such as photovoltaic silicon wafer cleaning, chip wet process, and high-purity reagent cooling, extremely stringent requirements are placed on the heat exchanger's sealing performance, connection strength, metal ion precipitation, and leak-free index.

[0003] Currently, the connection between fluorinated material tube sheets and tube bundles in the industry mainly adopts the traditional sintering and melting process. However, the gap between the tube sheet and the tube bundle cannot be eliminated adaptively. Insufficient contact and shallow fusion depth during melting lead to insufficient connection strength and failure problems such as leakage, tube detachment, and cracking during use. Since the sintering process relies on manual intermittent tightening of bolts for pre-tightening and compensation, it cannot achieve continuous automatic compensation with temperature changes, resulting in poor consistency and high scrap rate. Furthermore, there is no controllable constraint mechanism on the outer periphery of the tube sheet, and the thermal expansion and deformation at high temperatures are disordered, which can easily cause local over-welding or under-welding. The sealing performance and stability of the product are difficult to guarantee. High-end electronic-grade fluorinated material heat exchangers have long relied on imported equipment, which is costly, has long delivery time, and is inconvenient to maintain. Summary of the Invention

[0004] This invention provides an automatic adjustment and melting device for fluorine material heat exchanger tube sheets and tube bundles, aiming to solve the problems of poor product consistency and high scrap rate caused by the defects of traditional fluorine material heat exchanger tube sheet-tube bundle sintering process, such as the inability to automatically eliminate gaps, shallow welds and low strength, easy leakage and failure, unstable manual compensation, and uncontrollable deformation.

[0005] The present invention is implemented as follows: an automatic adjustment and melting device for a fluorine material heat exchanger tube sheet and tube bundle includes: a PLC warm air circulation furnace, a tube sheet, a tube bundle, and a fixing mechanism. The tube sheet is placed at the bottom center of the cavity inside the PLC warm air circulation furnace, and a through hole is opened at the bottom of the PLC warm air circulation furnace. The tube bundle passes through the through hole and one end is connected to the tube sheet. The tube sheet and the tube bundle are combined to form a tube sheet-tube bundle assembly. The fixing mechanism is installed inside the PLC warm air circulation furnace and includes an automatic expansion adjustment mechanism, an automatic clamp adjustment mechanism, an automatic tensioning mechanism, and a half-fixing ring. The automatic expansion adjustment mechanism is installed in the inner hole of the tube bundle, and the automatic adjustment clamp mechanism is fitted on the outer periphery of the tube sheet; the automatic tensioning mechanism is set on the top of the tube sheet, and the half-fixing ring is used for axial positioning and is set at the center of the bottom of the PLC hot air circulation furnace and is coaxially set with the through hole. The tube bundle passes through the half-fixing ring, and the tube sheet is located on the top of the half-fixing ring.

[0006] Preferably, the automatic adjustment expansion mechanism is a multi-lobed, multi-part combination expansion pin that floats up and down within the tube bundle.

[0007] Preferably, the automatic tensioning mechanism is composed of a spring, a pressure block, and a pull rod, and uses a spring self-compensating pre-tensioning.

[0008] Preferably, the PLC warm air circulating furnace is equipped with a frequency converter at the top center and a heat preservation device at the bottom, and the tube bundle passes through the heat preservation device.

[0009] Preferably, the tube sheet-tube bundle assembly consists of multiple fluorinated tube bundles inserted into corresponding holes in the upper and lower tube sheets, and a baffle is provided on the tube bundle, with spacer rods symmetrically arranged on both sides of the baffle.

[0010] Preferably, the half-fixing ring can be used in conjunction with an automatic tensioning mechanism.

[0011] Compared with the prior art, the embodiments of this application have the following main advantages: This solution incorporates a PLC-controlled warm air circulation furnace and a fixing mechanism. The PLC furnace provides a uniform and stable high-temperature sintering environment, while the fixing mechanism enables precise positioning and automatic melting adjustment. The automatic expansion adjustment mechanism, located within the tube bundle's inner bore, adaptively eliminates assembly gaps between the tube sheet and the tube bundle, ensuring full contact and reliable pre-tightening at the molten interface, significantly improving welding depth and connection strength. The automatic clamping mechanism automatically constrains the high-temperature expansion deformation of the tube sheet according to temperature changes, making the welding process uniform and controllable, effectively preventing local overheating or insufficient welding, and greatly improving product sealing and stability. The automatic tensioning mechanism automatically compensates for thermal expansion gaps and maintains continuous pre-tightening force, requiring no manual intervention throughout the process, significantly improving automation and production consistency. The half-fixing ring achieves precise axial positioning of the tube bundle and tube sheet, ensuring assembly coaxiality and structural accuracy. The entire device enables a stronger, cleaner, and more stable high-temperature molten bond between the tube sheet and tube bundle, fully meeting the requirements of high-end industries. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a top view of the tube sheet-tube bundle assembly of the present invention; In the diagram: 1. PLC warm air circulation furnace; 2. Tube sheet; 3. Tube bundle; 4. Fixing mechanism; 41. Automatic adjustment expansion mechanism; 42. Automatic adjustment clamp mechanism; 43. Automatic tensioning mechanism; 44. Half-fixing ring; 45. Insulation device; 5. Spacer rod; 6. Baffle plate; 7. Frequency converter. Detailed Implementation

[0013] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0014] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0015] This invention provides an automatic regulating and melting device for fluorine material heat exchanger tube sheets and tube bundles, such as... Figure 1-2 As shown, it includes: PLC warm air circulation furnace 1, tube sheet 2, tube bundle 3 and fixing mechanism 4. The tube sheet 2 is placed at the bottom center of the cavity inside the PLC warm air circulation furnace 1, and a through hole is opened at the bottom of the PLC warm air circulation furnace 1. The tube bundle 3 passes through the through hole and one end is connected to the tube sheet 2. The tube sheet 2 and the tube bundle 3 are combined to form a tube sheet-tube bundle assembly. The fixing mechanism 4 is installed in the PLC warm air circulation furnace 1 and includes an automatic expansion adjustment mechanism 41, an automatic clamp adjustment mechanism 42, an automatic tensioning mechanism 43 and a half fixing ring 44. An automatic expansion adjustment mechanism 41 is installed in the inner hole of the tube bundle 3, and an automatic clamping mechanism 42 is fitted on the outer periphery of the tube sheet 2; an automatic tensioning mechanism 43 is set on the top of the tube sheet 2, and a half-fixing ring 44 is used for axial positioning and is set at the bottom center of the PLC warm air circulation furnace 1 and is coaxially set with the through hole. The tube bundle 3 passes through the half-fixing ring 44, and the tube sheet 2 is located on the top of the half-fixing ring 44.

[0016] It should be noted that existing fluorinated material heat exchanger tube sheet-tube bundle sintering processes suffer from defects such as the inability to automatically eliminate gaps, shallow welds and low strength, easy leakage and failure, instability of manual compensation, and uncontrollable deformation, resulting in poor product consistency and high scrap rates. To address this issue, this solution incorporates a PLC-controlled warm air circulating furnace 1 and a fixing mechanism 4. The PLC-controlled warm air circulating furnace 1 provides a uniform and stable high-temperature sintering environment, working in conjunction with the fixing mechanism 4 to achieve precise positioning and automatic melting adjustment. The automatic expansion adjustment mechanism 41, located within the tube bundle 3's inner hole, adaptively eliminates the assembly gap between the tube sheet 2 and the tube bundle 3, ensuring full contact at the molten interface and reliable pre-tightening. The automatic adjustment clamp mechanism 42 can automatically constrain the high-temperature expansion and deformation of the tube sheet according to temperature changes, making the welding process uniform and controllable, effectively avoiding local overheating or insufficient welding, and greatly improving the product's sealing performance and stability; the automatic tensioning mechanism 43 can automatically compensate for thermal expansion gaps and maintain continuous pre-tightening force, requiring no manual intervention throughout the process, significantly improving the degree of automation and production consistency; the half-fixing ring 44 achieves precise axial positioning of the tube bundle 3 and the tube sheet 2, ensuring assembly coaxiality and structural accuracy. The overall device can make the high-temperature fusion bonding of the tube sheet 2 and the tube bundle 3 more solid, cleaner, and more stable in yield, fully meeting the requirements of high-end industries.

[0017] Specifically, in this embodiment, the solution mainly includes a PLC warm air circulation furnace 1, a tube sheet 2, tube bundles 3, and a fixing mechanism 4. In use, multiple fluorinated material tube bundles 3 are first inserted into corresponding holes in the upper and lower tube sheets 2, and then assembled into a tube sheet-tube bundle assembly with a spacer rod 5 and a baffle plate 6. This assembly is placed inside the PLC warm air circulation furnace 1, and coaxial positioning is achieved by a half-fixing ring 44. Then, an automatic adjustment expansion mechanism 41 is installed in the inner hole of the tube bundle 3, an automatic adjustment clamping mechanism 42 is fitted around the outer periphery of the tube sheet 2, and an automatic tensioning mechanism 4 is installed on the top of the tube sheet 2. 3. Start the PLC warm air circulation furnace 1 to heat the fluorine material to above the melting point. The contact surface between the tube bundle 3 and the tube sheet 2 enters a high-temperature melting state. The fluorine material expands due to heat. The automatic expansion adjustment mechanism 41 automatically eliminates the assembly gap and pre-tightens the support. The automatic clamping mechanism 42 constrains the deformation of the tube sheet and applies pressure evenly. The automatic tensioning mechanism 43 automatically compensates for the thermal deformation gap and continuously tensions. The three work together to fully melt and bond the tube bundle 3 and the tube sheet 2 into one. After heat preservation according to the process, the temperature is controlled and cooled according to the program to complete the high-strength and high-sealing integrated welding of the tube sheet and tube bundle.

[0018] In a further preferred embodiment of the present invention, such as Figure 1-2 As shown, the automatic adjustment expansion mechanism 41 is a multi-lobed, multi-part combination expansion pin that floats up and down within the tube bundle 3.

[0019] In this embodiment, the assembly gap between the tube sheet 2 and the tube bundle 3 is automatically eliminated by the automatic adjustment expansion mechanism 41, so that the outer wall of the tube bundle and the inner wall of the tube sheet hole are fully in contact, pre-tightened and fused together.

[0020] In a further preferred embodiment of the present invention, such as Figure 1-2 As shown, the automatic tensioning mechanism 43 is composed of a spring, a pressure block, and a pull rod, and adopts spring self-compensation pretensioning.

[0021] In this embodiment, a spring self-compensating preload method is adopted to achieve automated tension compensation without the need for manual adjustment.

[0022] In a further preferred embodiment of the present invention, such as Figure 1-2 As shown, a frequency converter 7 is installed at the top center of the PLC warm air circulating furnace 1, and an insulation device 45 is installed at the bottom, with the tube bundle 3 passing through the insulation device 45.

[0023] In this embodiment, the frequency converter 7 and the heat preservation device 45 are used to achieve precise closed-loop control of furnace temperature and air volume, ensuring a uniform and stable sintering temperature field.

[0024] In a further preferred embodiment of the present invention, such as Figure 1-2 As shown, the tube sheet-tube bundle assembly consists of multiple fluorinated tube bundles 3 inserted into corresponding holes in the upper and lower tube sheets 2, and a baffle 6 is provided on the tube bundles 3. Spacing rods 5 are symmetrically arranged on both sides of the baffle 6.

[0025] In this embodiment, multiple fluorine material tube bundles 3 are inserted into corresponding holes in the upper and lower tube sheets 2 and assembled with the spacer rod 5 and the baffle 6. This ensures precise assembly and positioning, strong structural integrity, and effectively guarantees uniform spacing and regular arrangement of the tube bundles 3. It also prevents displacement and shaking during the melting process, significantly improving the docking accuracy and welding consistency of the tube sheets 2 and tube bundles 3.

[0026] In a further preferred embodiment of the present invention, such as Figure 1-2 As shown, the half-fixing ring 44 can be used in conjunction with the automatic tensioning mechanism 43 to improve positioning and fastening stability.

[0027] It should be noted that, for the sake of simplicity, the foregoing embodiments are all described as a series of actions. However, those skilled in the art should understand that the present invention is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to the present invention. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to the present invention.

[0028] It should be understood that the disclosed apparatus can be implemented in other ways, given the several embodiments provided in this application. For example, the apparatus embodiments described above are merely illustrative. For instance, the division of units described above may be implemented in other ways in practice. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or communication connections shown or discussed may be through some interfaces; indirect coupling or communication connections between devices or units may be telecommunications or other forms.

[0029] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0030] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of the present invention according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of the present invention. These technical solutions also fall within the scope of protection of the present invention.

Claims

1. An automatic adjustment and melting device for tube sheets and tube bundles of fluorine material heat exchangers, characterized in that, include: The PLC warm air circulation furnace (1), tube sheet (2), tube bundle (3) and fixing mechanism (4) are provided. The tube sheet (2) is placed at the bottom center of the cavity inside the PLC warm air circulation furnace (1) and a through hole is provided at the bottom of the PLC warm air circulation furnace (1). The tube bundle (3) passes through the through hole and one end is connected to the tube sheet (2). The tube sheet (2) and the tube bundle (3) are combined to form a tube sheet-tube bundle assembly. The fixing mechanism (4) is installed inside the PLC warm air circulation furnace (1) and includes an automatic expansion adjustment mechanism (41), an automatic clamp adjustment mechanism (42), an automatic tensioning mechanism (43) and a half-fixing ring (44). The automatic expansion adjustment mechanism (41) is installed in the inner hole of the tube bundle (3), and the automatic adjustment clamp mechanism (42) is fitted on the outer periphery of the tube plate (2); the automatic tensioning mechanism (43) is set on the top of the tube plate (2), the half-fixing ring (44) is used for axial positioning and is set at the bottom center of the PLC warm air circulation furnace (1) and is coaxially set with the through hole, the tube bundle (3) passes through the half-fixing ring (44), and the tube plate (2) is located on the top of the half-fixing ring (44).

2. The automatic adjustment and melting device for the tube sheet and tube bundle of the fluorine material heat exchanger as described in claim 1, characterized in that, The automatic adjustment expansion mechanism (41) is a multi-lobed multi-piece combination expansion pin that floats up and down within the tube bundle (3).

3. The automatic adjustment and melting device for the tube sheet and tube bundle of the fluorine material heat exchanger as described in claim 1, characterized in that, The automatic tensioning mechanism (43) is composed of a spring, a pressure block, and a pull rod, and uses a spring self-compensating pre-tensioning.

4. The automatic adjustment and melting device for the tube sheet and tube bundle of a fluorine material heat exchanger as described in claim 1, characterized in that, The PLC hot air circulating furnace (1) is equipped with a frequency converter (7) at the top center and a heat preservation device (45) at the bottom, and the tube bundle (3) passes through the heat preservation device (45).

5. The automatic adjustment and melting device for the tube sheet and tube bundle of a fluorine material heat exchanger as described in claim 1, characterized in that, The tube sheet-tube bundle assembly consists of multiple fluorine material tube bundles (3) inserted into corresponding holes in the upper and lower tube sheets (2), and a baffle (6) is provided on the tube bundle (3). A spacer rod (5) is symmetrically provided on both sides of the baffle (6).

6. The automatic adjustment and melting device for the tube sheet and tube bundle of a fluorine material heat exchanger as described in claim 1, characterized in that, The half-fixing ring (44) can be used in conjunction with the automatic tensioning mechanism (43).

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