Combined gasket strip for spiral wound heat exchangers

Abstract

The utility model discloses a kind of combined gasket strips for winding pipe heat exchanger, the combined gasket strip includes support square steel, connecting plate, hollow and groove, the connecting plate both ends are bent downward and stamping out hollow and groove, the connecting plate outer edge is smooth transition, the connecting plate is bent downward along the both sides of axial direction, the support square steel is placed below bent connecting plate and is connected, hollow and groove form beta angle with plumb line. Downward bending is adopted at both ends, the connecting plate of outer edge smooth transition, can prevent the damage of heat exchange pipe in the process of supporting square steel edge in the process of pipe bundle winding and heat exchanger operation;Adopt hollow square steel structure, stiffness is satisfied, compared with solid, the weight of gasket strip can also be reduced, so that pipe bundle winding is easy and cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of petrochemicals and relates to a component for a wound tube heat exchanger, specifically, a combined gasket for a wound tube heat exchanger. Background Technology

[0002] Spiral coil heat exchangers are a type of high-efficiency heat exchanger with features such as a wide applicable temperature range, adaptability to thermal shock, and high compactness, and they play an important role in the refining and chemical industries.

[0003] Document NB / T10938-2022, "Winded Tube Heat Exchangers," discloses the structural form of wound tube heat exchangers. Wound tube heat exchangers are formed by alternately winding heat exchange tubes in a helical shape within the space between a central cylinder and an outer cylinder. The helical directions of adjacent layers of helical heat exchange tubes are opposite, and a spacer of a specific shape is used to maintain a certain distance between them. The spacer is usually stamped from steel plate and has grooves that match the heat exchange tubes for fixing and guiding them. Existing spacer designs are shown in the appendix. Figure 1 As shown.

[0004] Patents CN202321195650.7, CN202120502424.3, and CN201921947519.5 disclose a type of gasket for wound tube heat exchangers, which can meet the positioning requirements of heat exchange tubes. However, due to the narrowness of the gasket, it cannot meet the requirements of heat exchange applications with large heat exchange tube spacing (layer spacing). Furthermore, due to the lack of strong supporting components, there is a risk of deformation and failure during the tube bundle winding and operation processes. The disadvantages of the existing technology are that it is difficult to adapt to the requirements of heat exchange applications with low pressure drop and large heat exchange tube spacing (layer spacing), and the lack of strong supporting components poses a risk of deformation and failure.

[0005] The drawbacks of existing technologies are that they are difficult to adapt to heat exchange applications with low pressure drop and large heat exchange tube spacing (layer spacing), and they lack strong support components, posing a risk of deformation and failure. To address these issues, this invention proposes a novel spacer strip suitable for applications with large tube bundle layer spacing. Summary of the Invention

[0006] To address the problems existing in the prior art, this utility model provides a combined gasket for a wound tube heat exchanger.

[0007] This utility model provides a combined gasket for a wound tube heat exchanger. The combined gasket includes a supporting square steel, a connecting plate, a hollow part, and a groove. The two ends of the connecting plate are bent downward and punched to form the hollow part and the groove. The outer edge of the connecting plate is smoothly transitioned. The connecting plate is bent downward on both sides along the axial direction. The supporting square steel is placed below the bent connecting plate and connected. The hollow part and the groove form an angle β with the vertical line.

[0008] As an improved solution, the connecting plate is bent downwards at 90° on both sides, and the supporting square steel is placed between the downwardly bent connecting plates.

[0009] As a further improvement, the outer edge of the connecting plate is rounded off, and the supporting square steel is welded to the connecting plate.

[0010] As a further improvement, the β angle between the hollow and groove and the vertical line is equal to the spiral winding angle of the heat exchange tube. The spiral angle of the heat exchange tube is the spiral angle defined in the aforementioned document NB / T10938-2022, that is, the angle between the tangent of the spiral line of the heat exchange tube and the cross-section of the equipment.

[0011] As a further improvement, the heat exchanger tubes are placed inside the groove.

[0012] As a further improvement, the width a of the supporting square steel is 5-50mm, the thickness b is 1-10mm, the thickness c of the connecting plate is 2-10mm, the height d of the hollow and groove is 5-20mm, the β angle is 1°-30°, and the outer edge of the connecting plate is rounded with a value R of 1-10mm.

[0013] This utility model has the following beneficial effects:

[0014] 1) Due to the use of a combined structure, the spacing between the tube bundle layers is controlled by the supporting square steel, which also provides the corresponding support stiffness. The connecting plate can be made of thinner components, making it easier to process with hollows and grooves. The grooves stamped on the connecting plate are used to control the axial spacing of the heat exchange tubes.

[0015] 2) The hollowed-out parts processed in the connecting plate can also absorb the radial expansion during the operation of the heat exchanger.

[0016] 3) The supporting square steel serves as a spacer between different layers of heat exchange tubes, which can meet the requirements of low pressure drop and large layer spacing.

[0017] 4) The supporting square steel serves as a strength support component, which can prevent deformation of the spacer caused by external forces during the winding of the heat exchange tube bundle.

[0018] 5) The use of hollow square steel structure can reduce the weight of the pads compared with solid steel while meeting the rigidity requirements, making the tube bundle winding easier and reducing costs.

[0019] 6) The connecting plate with both ends bent downwards and the outer edge smoothly transitioned can prevent the edge of the supporting square steel from damaging the heat exchange tubes during the tube bundle winding process and the operation of the heat exchanger. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a spacer strip in the prior art;

[0021] Figure 2 This is the front view of the present utility model;

[0022] Figure 3 This is a side view of the present invention;

[0023] Figure 4 This is a schematic diagram of the connecting plate of this utility model;

[0024] Figure 5 This is a top view of the present invention;

[0025] Figure 6 The diagram below illustrates the present invention.

[0026] In the figure: 1-supporting square steel, 2-connecting plate, 3-hollowed-out, 4-groove, 5-center cylinder, 6-combination gasket strip of this utility model, 7-heat exchange tube. Detailed Implementation

[0027] The present invention will now be further described with reference to the accompanying drawings.

[0028] like Figures 1-6 As shown, this utility model provides a combined gasket for a wound tube heat exchanger. The combined gasket includes a supporting square steel 1, a connecting plate 2, a perforation 3, and a groove 4. The connecting plate is bent downwards at both ends and punched with perforations and grooves. The outer edge of the connecting plate has a smooth transition. The supporting square steel is placed between the two downwardly bent connecting plates and welded together. The perforations and grooves form an angle β with the vertical line. The width a of the supporting square steel is 5–50 mm, the thickness b is 1–10 mm, the thickness c of the connecting plate is 2–10 mm, the height d of the perforations and grooves is 5–20 mm, the β angle is 1°–30°, and the smooth transition R of the outer edge of the connecting plate is 1–10 mm.

[0029] The connecting plate is bent downwards at 90° on both sides, and the supporting square steel is placed between the two downwardly bent connecting plates. The outer edge of the bent connecting plate is smoothly transitioned. The supporting square steel is welded to the connecting plate. The β angle between the hollow and groove and the vertical line is equal to the spiral winding angle of the heat exchange tube. The heat exchange tube is placed inside the groove. The combined gasket is located between two adjacent layers of heat exchange tubes. The length direction of the gasket is consistent with the axial direction of the central cylinder. The innermost gasket is welded to the outer wall of the central cylinder, and the gasket of the next layer is fixed to the gasket of the layer inside it.

[0030] The above description is merely a typical embodiment of this utility model and does not impose any limitations on this utility model. Any changes or modifications made by those skilled in the art using the above content without departing from the scope of the technical solution of this utility model should be considered equivalent examples of equivalent changes. Any equivalent changes made to the above embodiments based on the technical essence of this utility model without departing from the content of the technical solution of this utility model shall fall within the scope of the technical solution of this utility model.

Claims

1. A combined gasket strip for a spiral wound heat exchanger, characterized by: The combined pad strip includes a supporting square steel, a connecting plate, a hollowed-out section, and a groove. The connecting plate is bent downwards at both ends and punched with hollowed-out sections and grooves. The outer edge of the connecting plate is smoothly transitioned. The connecting plate is bent downwards on both sides along the axial direction. The supporting square steel is placed below the bent connecting plate and connected. The hollowed-out section and groove form an angle β with the vertical line.

2. The combined gasket for a wound tube heat exchanger according to claim 1, characterized in that: The connecting plate is bent downwards at 90° on both sides, and the supporting square steel is placed between the downwardly bent connecting plates.

3. The combined gasket for a wound tube heat exchanger according to claim 1, characterized in that: The outer edge of the connecting plate is smoothly curved, and the supporting square steel is welded to the connecting plate.

4. The combined gasket for a wound tube heat exchanger according to claim 1, characterized in that: The β angle between the hollow and groove and the vertical line is equal to the spiral winding angle of the heat exchange tube, which is the angle between the tangent of the heat exchange tube spiral and the cross-section of the equipment.

5. The combined gasket for a wound tube heat exchanger according to claim 1, characterized in that: The heat exchanger tubes are placed inside the groove.

6. The combined gasket for a wound tube heat exchanger according to claim 1, characterized in that: The width a of the supporting square steel is 5-50mm, the thickness b is 1-10mm, the thickness c of the connecting plate is 2-10mm, the height d of the hollow and groove is 5-20mm, the β angle is 1°-30°, and the outer edge of the connecting plate has a smooth transition R value of 1-10mm.

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