Linear arrangement tooth-shaped strip structure and manufacturing method thereof

Abstract

The invention discloses a linearly-arranged tooth-shaped strip structure and a manufacturing method thereof, and relates to the technical field of equidistant placement of winding pipe type heat exchangers, the linearly-arranged tooth-shaped strip structure comprises a flat strip, a plurality of protrusions are pressed at equal intervals along the flat strip to form tooth-shaped strips, and a groove used for placing a heat exchange pipe is formed between every two adjacent protrusions. According to the invention, the tube shaft spacing of the heat exchange tubes can be ensured to be uniform and consistent and meet the spacing required by winding parameters.

Description

Technical Field

[0001] The present invention relates to the technical field of equidistant placement of wound tube heat exchangers, and specifically to a linear arrangement tooth-shaped strip structure and a manufacturing method thereof. Background Art

[0002] A wound tube heat exchanger is a shell-and-tube heat exchanger that is widely used. The wound heat exchange tube bundle structure consists of a central tube, tube sheets at both ends, wound heat exchange tubes, spacer bars, etc. The central tube is fixedly connected to the upper tube sheet and the lower tube sheet, and plays a role in supporting the weight of the tube bundle and transmitting the winding torque during the manufacturing process. The first layer of heat exchange tubes is helically wound around the central tube, the second layer is wound around the first layer of heat exchange tubes, and the winding of each layer of heat exchange tubes is completed in turn. The two ends of each heat exchange tube in each layer pass through the corresponding holes on the upper tube sheet and the lower tube sheet respectively, and are fixedly connected to the tube sheet to ensure the connection strength and reliable sealing. During the winding process of each layer of heat exchange tubes, spacer bars need to be laid in advance, and a guide cylinder is wrapped after the winding of the tube bundle is completed; the shell component consists of a cylinder, a head, a pipe connection, a lifting lug, a support, etc. The shell is sleeved outside the wound tube bundle, and a retaining ring is welded between the inner surface of the shell and the guide cylinder to prevent the medium from short-circuiting through the gap between the shell and the guide cylinder. The tube box and the shell are welded to the tube sheet.

[0003] The spacer bar has the following problems: 1. The existing spacer bar is generally formed by punching and shearing, with waste materials, low material utilization rate (as low as 50%), a large number of burrs, and requires a large amount of manpower to grind and remove, resulting in high material costs; 2. The burrs, sharp teeth and sharp edges formed by punching and shearing of the existing spacer bar are likely to damage the heat exchange tubes, increasing the risk of tube damage and leakage; 3. The sharp teeth of the existing spacer bar are easily knocked and tilted, increasing the difficulty of tube bundle winding. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a linear arrangement tooth-shaped strip structure and a manufacturing method thereof to ensure that the axial spacing of the heat exchange tubes is uniform and consistent, meeting the spacing requirements of the winding parameters.

[0005] The purpose of the present invention is achieved by the following technical solutions: A linear arrangement tooth-shaped strip structure, the structure includes a flat strip, and several protrusions are pressed out at equal distances along the flat strip to form a tooth-shaped strip, and a groove for placing a heat exchange tube is formed between adjacent protrusions.

[0006] A manufacturing method of a linear arrangement tooth-shaped strip includes the following steps:

[0007] S1. Select a flat strip.

[0008] S2. Adopt a die pressing forming method, and press out several protrusions upward at equal distances along the bottom plane of the flat strip. These evenly spaced protrusions are linearly arranged along the length direction of the flat strip to form a linear arrangement tooth-shaped strip.

[0009] The cross-section of the protrusion is approximately an isosceles trapezoid, which is convenient for clamping the heat exchange tube placed at the groove.

[0010] The toothed strip includes several flat sections and several protruding sections. The connection between adjacent flat sections and protruding sections is set in an arc shape, which facilitates the transition between the flat sections and the protruding sections and also facilitates clamping the heat exchange tube.

[0011] A flat gasket strip is provided at the bottom of the toothed strip. When the radial layer spacing of the wound tube bundle of the heat exchange tube is greater than the thickness of the thin flat steel strip, the matrix thickness of the combined structure of the toothed strip and the flat gasket strip meets the requirements of its radial layer spacing.

[0012] Specifically, the width, length, and thickness of the flat gasket strip are determined by the staff according to the requirements of the radial layer spacing of the wound tube bundle of the heat exchange tube. The width, length, and thickness of the flat gasket strip can be greater than, less than, or equal to the width, length, and thickness of the toothed strip.

[0013] The toothed strip can be made of flat steel strip. The flat steel strip is easy to process and form, more stable and durable during processing and use, has high strength and good toughness. Parameters such as the tolerance range, three-point difference, same-strip difference, and sickle bend of the flat steel strip are superior to those of medium plate, the plate shape straightness is good, and the length sizing accuracy is high.

[0014] The beneficial effects of the present invention are:

[0015] 1. The present invention can meet the use requirements of alternating left-handed and right-handed winding of adjacent layers of heat exchange tubes, reducing the difficulty of production site management.

[0016] 2. The straight-line arranged toothed strip of the present invention can usually be stamped from a 1x8mm flat steel strip. No material needs to be removed during the stamping process, so it saves materials, and the material utilization rate is as high as 100%. It is more economical and practical than the conventional structure and does not damage the tubes of the heat exchange tubes.

[0017] 3. The die stamping production efficiency is high, and continuous rolling and punching of teeth can be achieved. The stamping length of the toothed strip is not limited by the processing method, and no manpower is required to splice and lengthen.

[0018] 4. The toothed strip punched by die pressing has no burrs, sharp teeth, and sharp edges, avoiding the risk of damage and leakage to the heat exchange tubes and saving the manpower consumption required for burr treatment.

[0019] 5. During the use of die-pressed teeth, the toothed strip will not collapse, and the control effect on the axial spacing of the tubes of the heat exchange tubes is very good. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of the present invention;

[0021] Figure 2 is Figure 1 the top view of

[0022] Figure 3 is the structural schematic diagram of the toothed bar;

[0023] Figure 4 is Figure 3 the sectional structural schematic diagram of part I in

[0024] Figure 5 is Figure 3 the top view of

[0025] Figure 6 is Figure 3 the structural schematic diagram of the heat exchange tube placement in

[0026] Figure 7 is Figure 5 the structural schematic diagram of the heat exchange tube placement in

[0027] In the figure: 1 - toothed bar, 2 - heat exchange tube, 3 - flat gasket strip, 4 - protrusion. Specific embodiments

[0028] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0030] In one embodiment of the present application:

[0031] Such as Figures 1 to 7As shown in the figure, there is a structure of a straight-line arranged toothed bar. This structure includes a flat bar. By using a die-casting forming method, several protrusions 4 are pressed upward at equal intervals L along the plane of the flat bar to form a toothed bar 1 (that is, several protrusions 4 are linearly arranged along the length direction of the flat bar to form a straight-line arranged toothed bar structure. It can also be stamped with a 1mm * 8mm thin flat steel bar. During the stamping process, no material needs to be removed, so it saves materials, and the material utilization rate is as high as 100%. The die stamping production efficiency is high, and continuous rolling and punching of teeth can be achieved. The stamping length of the rack is not limited by the processing method, and the punched protrusions 4 will not collapse, with high stability. It has a good control effect on the tube axis spacing of the heat exchange tube 2. There is no need to consume manpower to splice and lengthen, and there are no burrs, sharp teeth, or sharp edges, avoiding the risk of damage and leakage to the heat exchange tube 2, and saving the manpower consumption required for dealing with burrs). The length L is equal to the spacing between the same-layer axes around which the heat exchange tube 2 is wound. A groove for placing the heat exchange tube 2 is formed between adjacent protrusions 4.

[0032] The cross-section of the protrusion 4 is a quasi-isosceles trapezoid, which is convenient for clamping the heat exchange tube 2 placed in the groove.

[0033] The toothed bar 1 includes several flat sections and several protrusion sections. The connection between adjacent flat sections and protrusion sections is set in an arc shape for the transition between the flat section and the protrusion section.

[0034] The toothed bar 1 can be made of a thin flat steel bar material, and the common cross-sectional size of the thin flat steel bar is 1mm * 8mm.

[0035] During the process of the heat exchange tube 2 winding around the tube bundle, the wound heat exchange tubes 2 are respectively clamped in the grooves on the toothed bar 1 for position fixation. The center distance L between adjacent protrusions 4 is equal to the spacing between the same-layer axes around which the heat exchange tube 2 is wound.

[0036] In another embodiment of the present application:

[0037] Based on the previous embodiment, in this embodiment, the toothed bar 1 is improved. When the radial layer spacing of the winding tube bundle of the heat exchange tube 2 is greater than the thickness of the thin flat steel bar, a flat cushion bar 3 is provided at the bottom of the toothed bar 1, and the base thickness of the combined structure of the toothed bar 1 and the flat cushion bar 3 meets the requirements of the radial layer spacing.

[0038] Specifically, the width, length, and thickness of the flat cushion bar 3 are determined by the staff according to the requirements of the radial layer spacing of the winding tube bundle of the heat exchange tube 2. The width, length, and thickness of the flat cushion bar 3 can be greater than, less than, or equal to the width, length, and thickness of the toothed bar 1.

[0039] The above are only embodiments of the present invention. It should be understood that the present invention is not limited to the forms disclosed herein, should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications, and environments, and can be changed within the scope of the concept described herein through the above teachings or the techniques or knowledge in the relevant field. Any changes and modifications made by those skilled in the art without departing from the spirit and scope of the present invention shall fall within the protection scope of the appended claims of the present invention.

Claims

1. A structure of a straight-line arranged toothed bar, characterized in that: It includes a flat strip, and several protrusions (4) are pressed out at equal distances along the flat strip to form a toothed strip (1), and grooves for placing heat exchange tubes (2) are formed between adjacent protrusions (4).

2. The structure of a straight-arranged toothed bar according to claim 1, characterized in that: The cross-section of the protrusion (4) is a quasi-isosceles trapezoid.

3. The structure of a straight-line arranged toothed bar according to claim 1, wherein: The toothed strip (1) includes several flat sections and several protrusion sections, and the joints between adjacent flat sections and protrusion sections are set in an arc shape.

4. A linear arrangement tooth-shaped bar structure according to claim 1, characterized in that: A flat gasket strip (3) is arranged at the bottom of the toothed strip (1).

5. A linear arrangement tooth-shaped bar structure according to claim 4, characterized in that: The width, length, and thickness of the flat gasket strip (3) are respectively greater than the width, length, and thickness of the toothed strip (1).

6. A linear arrangement tooth bar structure according to claim 1, wherein: The toothed strip (1) can be made of flat steel strip material.

7. A manufacturing method of a tooth-shaped strip arranged in a straight line, characterized in that: It includes the following steps: S1. Select a flat strip; S2. Adopt a die pressing forming method to press out several protrusions (4) upward at equal distances along the bottom plane of the flat strip. These evenly spaced protrusions (4) are arranged in a straight line along the length direction of the flat strip to form a straight-line arranged toothed strip.

8. The manufacturing method of a straight-arranged toothed bar according to claim 7, characterized in that: The cross-section of the protrusion (4) is a quasi-isosceles trapezoid.

9. The manufacturing method of a straight-arranged toothed bar according to claim 7, characterized in that: The straight-line arranged toothed strip includes several flat sections and several protrusion sections, and the joints between adjacent flat sections and protrusion sections are set in an arc shape.

10. The manufacturing method of a linearly arranged toothed bar according to claim 7, characterized in that: A flat gasket strip (3) is covered at the bottom of the straight-line arranged toothed strip.

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