Bent pipe fin winding tool

Abstract

The utility model relates to the technical field of industrial furnace tube processing clamps, in particular to a bent tube fin winding tool which comprises an auxiliary tube body and petal bodies, and a tube supporting part extends from the front end of the auxiliary tube body and is used for supporting a straight tube section and enabling the straight tube section to be coaxial with the auxiliary tube body; the petal body and the pipe supporting part are separably locked so as to hoop the straight pipe section; a receding hole is formed in the connecting position of the end of the auxiliary pipe body and / or the end of the petal body so that the bent pipe section can penetrate out of the receding hole. During use, a peripheral machine tool chuck clamps the end of the auxiliary pipe body to drive the auxiliary pipe body to rotate, the straight pipe section can be coaxially driven to rotate, and fins can be directly wound outside the straight pipe section. Compared with the prior art, the receding hole is formed in the connecting position of the end of the auxiliary pipe body and the end of the petal body so that the bent pipe section can penetrate out, the bent pipe section can be close to a machine tool chuck, centrifugal force generated during rotation is close, and obvious vibration is not generated; in addition, the machine tool chuck and the bent pipe section are located on the same side of the straight pipe section where the fins need to be wound, and therefore the rotating bent pipe section cannot hinder the straight pipe section from winding the fins.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial furnace tube processing fixtures, and particularly relates to a bending pipe and winding fin tooling. Background Art

[0002] The finned tube is a heat exchange element. In order to improve the heat exchange efficiency, fins are usually added to the surface of the heat exchange tube to increase the outer surface area of the heat exchange tube, so as to achieve the purpose of improving the heat exchange efficiency. The heating furnace with finned tubes as heat exchange elements includes shell-and-tube heating furnaces, double-pipe heating furnaces, finned tube air coolers, heat pipe heating furnaces, atmospheric furnaces, vacuum furnaces, hydrogen production furnaces, reforming furnaces, coking furnaces, reforming furnaces, cracking furnaces, etc. The function of the tubular heating furnace is to heat the medium (crude oil, oil or gas) to the temperature required by the process for refining, decomposition or synthesis. The special equipment for finned tube heating furnaces belongs to high-efficiency heat exchange and energy-saving equipment, and can be specifically used for heat exchange requirements in petroleum refining and chemical industry, coal chemical industry, chemical fertilizer, air conditioning, air cooling, power facility equipment, etc., including application methods such as heating or cooling the medium.

[0003] The traditional way of winding fins is to fix the end of the metal tube to be finned on the three-jaw chuck of the machine tool, rotate the metal tube, and the strip-shaped fins are spirally wound on the outer wall of the metal tube. Conventional finned tubes are straight tubes. When a bent tube is required, the finned tube is bent and deformed. However, the surface deformation of the heat exchange tube will pull the fins, and even the fin head will be damaged. Special equipment is needed to bend the finned tube. For example, a finned tube bending device disclosed in the Chinese patent document with the publication number CN207271869U includes: a frame, a bending mechanism fixing frame, and a bending mechanism; the frame is arranged at the bottom, and the bending mechanism fixing frame is installed on the frame; a vertical guide rail is provided on the bending mechanism fixing frame, and a lifting hydraulic cylinder is installed on its lower bottom plate; the bending mechanism includes a fixed bottom plate, a fixed shaft, a driving mechanism, a movable pulley mechanism, and a fixed pulley mechanism; the fixed bottom plate is matched with the vertical guide rail through a vertical slider; the fixed shaft is arranged on the fixed bottom plate, the lower part of the fixed shaft is connected with the lifting hydraulic cylinder, the movable pulley fixing plate and the fixed pulley fixing plate are installed on the fixed shaft, the driving mechanism drives the movable pulley fixing plate to rotate around the fixed shaft, and the movable pulley mechanism and the fixed pulley mechanism are respectively installed on the movable pulley fixing plate and the fixed pulley fixing plate; the finned tube bending device starts to bend from both ends of the finned tube, solves the problem of deformation of the finned tube caused by fixture clamping, and the separation of the fixed pulley from the finned tube will not damage the finned tube.

[0004] The above special bending devices are costly and have complex structures. For winding fins on the bent pipe, the bent pipe includes a continuous straight pipe section and a bent pipe section. Since the fins need to be wound on the straight pipe section, the straight pipe section must be rotated around the axis of the straight pipe section to achieve winding the fins. The straight pipe section needs to be fixed to the chuck of the machine tool. In this way, the bent pipe section is far away from the chuck of the machine tool. On the one hand, the bent pipe section deviates from the rotation center and is far away from the clamping end, so the centrifugal force is large, which will cause vibration; on the other hand, the straight pipe section that needs to be wound with the fins is located between the clamping end and the bent pipe section. The rotating bent pipe section blocks the feeding of the fin belt and blocks the space for winding the fins on the straight pipe section.

[0005] In summary, it is difficult to directly rotate the bent tube around the fin on the machine tool in the prior art, which affects the manufacturing efficiency. Summary of the invention

[0006] In view of the above technical problems in the prior art, the utility model provides a tool for bending pipes around fins.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] Provided is a tool for bending a pipe around a fin, wherein the bent pipe comprises a continuous and non-coaxial straight pipe section and a bent pipe section, and is characterized in that: the tool comprises an auxiliary pipe body and a petal body, the auxiliary pipe body is a straight pipe and its end is clamped by a peripheral machine tool chuck, a trustee portion is extended from the front end of the auxiliary pipe body, and is used to hold the straight pipe section and make it coaxial with the auxiliary pipe body; the petal body and the trustee portion are detachably locked to clamp the straight pipe section; and a clearance hole is provided at the end connection of the auxiliary pipe body and / or the petal body, so that the bent pipe section can pass through the clearance hole.

[0009] As a further optional technical solution, the trustee portion and the petal body are both in the form of long arc-shaped sheets, and they surround each other to form a tubular structure coaxial with the auxiliary tube body.

[0010] As a further optional technical solution, the auxiliary tube body and the valve body are an integrated structure.

[0011] As a further optional technical solution, the auxiliary tube body and the valve body are formed by cutting out a semicircular segment from the side wall of a straight metal tube.

[0012] As a further optional technical solution, a first slot is opened at the port of the auxiliary tube body, a second slot is opened at the port of the petal body, and the first slot and the second slot are spliced ​​to form the clearance hole.

[0013] As a further optional technical solution, the hole wall of the yield hole is arranged to be inclined so as to fit the outer wall of the curved pipe section.

[0014] As a further optional technical solution, the hosting part is provided with a first boss, the petal body is provided with a second boss, the first boss and the second boss are fitted together, and concentric locking holes are opened, and the locking holes are penetrated by bolt and nut assemblies, so as to lock the first boss and the second boss together.

[0015] As a further optional technical solution, there are multiple first bosses and second bosses, and they correspond to each other one by one.

[0016] As a further optional technical solution, the trustee portion and the first boss are welded and fixed to each other, and the petal body and the second boss are welded and fixed to each other.

[0017] As a further optional technical solution, the trusteeship portion and the first boss are cast together as one piece, and the petal body and the second boss are cast together as one piece.

[0018] Beneficial effects of the utility model:

[0019] The utility model provides a fin-winding tool for a bent pipe. When in use, the straight pipe section of the bent pipe is clamped and positioned by the tube holder and the petal body, and the bent pipe section passes through the clearance hole. When the outer machine tool chuck clamps the end of the auxiliary pipe body and drives it to rotate, it can coaxially drive the straight pipe section to rotate, and the fins can be directly wound outside the straight pipe section. Compared with the prior art, a clearance hole is provided at the end connection of the auxiliary pipe body and the petal body for the bent pipe section to pass through, so that the bent pipe section is closer to the machine tool chuck, so the centrifugal force generated during rotation is closer, and no obvious vibration is generated; furthermore, the machine tool chuck and the bent pipe section are located on the same side of the straight pipe section on which the fins need to be wound, so the rotating bent pipe section will not hinder the straight pipe section from winding the fins, which makes it possible for the bent pipe to be wound directly on the machine tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a cross-sectional view of a tube bending and fin wrapping tool in an embodiment.

[0021] Figure 2 It is a front view of a pipe bending and fin wrapping tool in an embodiment.

[0022] Figure 3 It is a top view of a pipe bending and fin wrapping tool in an embodiment.

[0023] Figure 4 Schematic diagram of the bent pipe for winding fins required in the embodiment.

[0024] Reference numerals:

[0025] Straight pipe section 100, curved pipe section 200;

[0026] Auxiliary tube body 1, first slot 11;

[0027] The trusteeship portion 2 and the first boss 21;

[0028] Valve body 3, second slot 31, second boss 32;

[0029] Relieving hole 4, bolt and nut assembly 5. Specific implementation manner

[0030] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Without conflict, the following embodiments and the features in the embodiments may be combined with each other.

[0031] A bending pipe finning tooling in this embodiment, the bending pipe for which fins need to be wound is as Figure 4 shown, including a bending pipe including a continuous and non-coaxial straight pipe section 100 and a bending pipe section 200. It is necessary to wind fins on a part of the straight pipe section 100. Of course, in practice, fins can be wound on the straight pipe section 100 of other-shaped bending pipes according to needs.

[0032] As Figures 1 to 3 shown, this tooling includes an auxiliary pipe body 1 and a valve body 3. The auxiliary pipe body 1 is a straight pipe and its end is clamped by an external machine tool chuck. A supporting part 2 extends from the front end of the auxiliary pipe body 1. The supporting part 2 is a semi-circular arc-shaped sheet for supporting the straight pipe section 100 and making it coaxial with the auxiliary pipe body 1. The valve body 3 is detachably locked with the supporting part 2 to clamp the straight pipe section 100 tightly. A relieving hole 4 is provided at the end connection of the auxiliary pipe body 1 and / or the valve body 3 for the bending pipe section 200 to pass through from the relieving hole 4.

[0033] During use, the straight pipe section 100 of the bending pipe is clamped and positioned by the supporting part 2 and the valve body 3. The straight pipe section 100 where fins need to be wound is misaligned with the supporting part 2 and the valve body 3, and the bending pipe section 200 passes through the relieving hole 4. When the external machine tool chuck clamps the end of the auxiliary pipe body 1 and drives it to rotate, it can coaxially drive the straight pipe section 100 to rotate, and fins can be directly wound outside the straight pipe section 100. Compared with the prior art, a relieving hole 4 is provided at the end connection of the auxiliary pipe body 1 and the valve body 3 for the bending pipe section 200 to pass through, making the bending pipe section 200 closer to the machine tool chuck, so the centrifugal force generated during rotation is closer; furthermore, the machine tool chuck and the bending pipe section 200 are on the same side of the straight pipe section 100 where fins need to be wound, so the rotating bending pipe section 200 will not hinder the straight pipe section 100 from winding fins.

[0034] In this embodiment, both the supporting part 2 and the valve body 3 are long arc-shaped sheets, and they enclose a tubular structure coaxial with the auxiliary pipe body 1. The inner diameter of the tubular structure fits and matches the outer diameter of the straight pipe section 100.

[0035] In this embodiment, the auxiliary tube body 1 and the valve body 3 are integrally structured with each other. Specifically, the auxiliary tube body 1 and the valve body 3 are formed by cutting a segment of a semi-circle from the side wall of a metal straight tube. Of course, in practice, the auxiliary tube body 1 and the valve body 3 can be structures that are fixedly welded to each other.

[0036] In this embodiment, a first slot 11 is opened at the port of the auxiliary tube body 1, and a second slot 31 is opened at the port of the valve body 3. The first slot 11 and the second slot 31 are spliced to form the relief hole 4. The hole wall of the relief hole 4 is inclined to fit the outer wall of the elbow section 200.

[0037] In this embodiment, the trusteeship part 2 is provided with a first boss 21, and the valve body 3 is provided with a second boss 32. The first boss 21 and the second boss 32 are in contact with each other, and concentric locking holes are opened. A bolt-nut assembly 5 is inserted through the locking holes to lock the first boss 21 and the second boss 32 together. Specifically, the number of the first boss 21 and the second boss 32 is multiple, and they correspond to each other one by one.

[0038] In this embodiment, the trusteeship part 2 and the first boss 21 are fixedly welded to each other, and the valve body 3 and the second boss 32 are fixedly welded to each other. Of course, in practice, it can be changed to that the trusteeship part 2 and the first boss 21 are integrally formed by casting, and the valve body 3 and the second boss 32 are integrally formed by casting.

[0039] In the description of the present invention, it is obvious that the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Usually, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0040] Therefore, the above detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the present invention to be protected, but only represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present invention.

[0041] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "in", "on", "under", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the invention product is usually placed. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "arranged", "connected" and "coupled" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection. It may be a mechanical connection or an electrical connection. It may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

Claims

1. A bending pipe winding fin tooling, the bending pipe comprising a continuous and non-coaxial straight pipe section (100) and a bending pipe section (200), characterized in that: The tooling includes an auxiliary pipe body (1) and a flap body (3). The auxiliary pipe body (1) is a straight pipe, and its end is clamped by a peripheral machine tool chuck. A supporting part (2) extends from the front end of the auxiliary pipe body (1) for supporting the straight pipe section (100) and making it coaxial with the auxiliary pipe body (1); the flap body (3) is detachably locked with the supporting part (2) to clamp the straight pipe section (100); a relief hole (4) is provided at the joint of the ends of the auxiliary pipe body (1) and / or the flap body (3) for the bent pipe section (200) to pass through the relief hole (4).

2. The bending pipe finning tooling according to claim 1, characterized in that: Both the supporting part (2) and the flap body (3) are in the shape of long strip arc-shaped sheets and enclose a tubular structure coaxial with the auxiliary pipe body (1).

3. The tube bending and fin wrapping tooling according to claim 1, characterized in that: The auxiliary pipe body (1) and the flap body (3) are of an integrated structure with each other.

4. The bending pipe finning tooling according to claim 3, characterized in that: The auxiliary pipe body (1) and the flap body (3) are formed by cutting a semi-circular segment from the side wall of a metal straight pipe.

5. The bending pipe finning tooling according to claim 1, characterized in that: A first slot (11) is opened at the port of the auxiliary pipe body (1), and a second slot (31) is opened at the port of the flap body (3). The first slot (11) and the second slot (31) are spliced to form the relief hole (4).

6. The bending pipe finning tooling according to claim 5, characterized in that: The hole wall of the relief hole (4) is inclined to fit the outer wall of the bent pipe section (200).

7. A pipe bending and finning tooling according to claim 1, characterized in that: The supporting part (2) is provided with a first boss (21), and the flap body (3) is provided with a second boss (32). The first boss (21) and the second boss (32) are in contact with each other and are provided with concentric locking holes. A bolt and nut assembly (5) is inserted through the locking holes to lock the first boss (21) and the second boss (32) together.

8. The tube bending and fin winding tooling according to claim 7, characterized in that: The number of the first bosses (21) and the second bosses (32) is multiple and they correspond to each other one by one.

9. The tube bending and fin winding tooling according to claim 1, characterized in that: The supporting part (2) and the first boss (21) are fixedly welded to each other, and the flap body (3) and the second boss (32) are fixedly welded to each other.

10. A pipe bending and finning tooling according to claim 1, characterized in that: The supporting part (2) and the first boss (21) are integrally formed by casting, and the flap body (3) and the second boss (32) are integrally formed by casting.

Images