KR200489104Y1 - Fin eraser assembly using the fin eraser for heat exchanger tube - Google Patents

Abstract

A pin eliminator for removing a pin formed on an outer circumferential surface of a heat transfer tube by rotating in conjunction with rotation of a rotary machine tool according to the present invention has a cylindrical inner circumferential surface extending in one direction and capable of wrapping the outer circumferential surface of the heat transfer tube, An opening extending in the direction of the opening; And a cutting portion protruding from one end of the extending portion along a direction in which the extending portion extends, the cutting portion being formed along a circumference of the one end of the extending portion, wherein when the cutting portion contacts the pin and the work portion of the rotary machine tool rotates , And the pin is cut by rotating the cutting portion.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a pin eliminator assembly using a pin eliminator for an electro-

The present invention relates to a thermal eliminator pin eliminator and a pin eliminator assembly using the same.

The heat exchanger used in the heat exchanger of the power plant has a long service life, requiring periodic replacement and maintenance. As a heat transfer pipe used in a heat exchanger of a power plant, a fin tube formed on the outer peripheral surface of the fin is widely used to increase the thermal conductivity. In order to replace and maintain the fin tube heat transfer pipe, it is necessary to remove such a fin. However, the pins of these fin tube are attached to the tube by an electric resistance welding (ERW) method, and are not easy to remove.

Conventional tools that can be used to remove these pins include oxygen-acetylene cutters, high-speed grinders, and air chipping hammer. However, when the pin is removed by using the oxygen-acetylene cutter, a large amount of heat is generated, and the material of the heat transfer pipe is damaged and deformed. When using an electric / air high-speed grinder, there is a problem that a scattering flame is generated and a grinder skipping phenomenon due to a heat transfer pipe stenosis occurs, which poses a great risk to the safety of a worker. Also, when the air chipping hammer is used, the pin is removed by applying a shock to the pin by applying a chisel thereto. However, there is a problem that the heat transfer pipe itself may be damaged during the impact.

Also, the tools described above are not the only tools provided for pin removal, and are provided for other tasks or general purpose tasks. Therefore, there is a need for a dedicated tool that can more effectively and safely remove the pins of the heat transfer tube, since it is not designed to be completely adapted to the pin removal of the heat transfer tube.

The present invention has been made in order to solve these problems, and the object of the present invention is to provide a pin eliminator for removing pins of a heat transfer pipe and a pin eliminator assembly using the same.

The pin eliminator includes a cylindrical inner circumferential surface extending in one direction and capable of wrapping around an outer circumferential surface of the heat transfer tube, An extension extending in the elongated direction; And a cutting portion protruding from one end of the extending portion along a direction in which the extending portion extends, the cutting portion being formed along a circumference of the one end of the extending portion, wherein when the cutting portion contacts the pin and the work portion of the rotary machine tool rotates , And the pin is cut by rotating the cutting portion.

The pin eliminator according to the embodiment may further include a base portion coupled to the rotatable work portion of the rotary machine tool and connected to the other end of the extension portion, wherein the work portion includes a tool engaging portion engageable with a tool for a rotary machine tool And the base portion may include a base coupling portion detachably coupled to the tool coupling portion.

Wherein the base engaging portion is formed by a plurality of base engaging portions disposed at regular intervals along the circumference of the base portion and protruding from the base portion in a direction opposite to the extending direction of the extending portion, Wherein the plurality of base engaging portions are formed in a shape corresponding to the position of the base engaging portion and are formed in the form of concave recessed portions and the plurality of base engaging portions are inserted into the plurality of tool engaging portions, The base can be removably coupled.

The cutting portion may include a plurality of cutting edges arranged at regular intervals along a circumference of one end of the extended portion.

Wherein a land formed in a spiral shape on the outer circumferential surface of the extended portion and projecting more than the groove in a radial direction of the pin eliminator extends from the plurality of cutting edges to form a spiral shape .

The pin eliminator assembly for removing the fin formed on the outer circumferential surface of the heat transfer pipe according to the embodiment includes: a beveler having a rotatable work part; And a pin eliminator including a base portion coupled to the working portion of the beveler, an extension having a cylindrical inner circumferential surface extending from the base portion and capable of wrapping the outer circumferential surface of the heat transfer tube, and a cutting portion protruding from one end of the extension portion Wherein the beveler further comprises a shaft passing through the center of the pin remover surrounded by the inner circumferential surface of the extension portion, the shaft projecting radially from the shaft and contacting the inner circumferential surface of the heat transfer tube, And the clamp is fixed to the inner circumferential surface of the heat transfer tube. When the cutting portion contacts the fin and the work portion of the beveler rotates, the cutting portion rotates the fin by rotating the fin.

Wherein the clamp is constituted by a plurality of clamp blocks, and the plurality of clamp blocks adjacent to each other with respect to the center of the shaft are arranged to form a predetermined angle, and the shaft has a degree of protrusion of the clamp block from the shaft And a clamp adjusting unit for adjusting the clamping force.

Wherein the shaft further includes an inner shaft which is reciprocated along a direction in which the shaft extends in the shaft in accordance with an operation of the clamp adjusting portion, wherein when the inner shaft is advanced, So that the clamp block can be moved in the radial direction of the shaft.

As a result, the fin of the heat transfer pipe can be efficiently removed, the safety of the operator can be ensured, and damage to the heat transfer pipe can be prevented.

1 is a perspective view of a pin remover assembly according to one embodiment of the present invention.
2 is a perspective view illustrating a pin remover according to an embodiment of the present invention.
3 is a bottom view of a pin remover according to one embodiment of the present invention.
4 is a side view of a beveler used in a pin remover assembly according to one embodiment of the present invention;
FIG. 5 is a view showing a pin eliminator assembly according to an embodiment of the present invention clamping a heat transfer tube. FIG.
6 is a view showing a state where a pin remover according to an embodiment of the present invention removes a fin of a heat transfer pipe.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference symbols as possible even if they are shown in different drawings. In the following description of the embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may obscure the embodiments of the present invention.

In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) can be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; may be " connected, " " coupled, " or " connected. &Quot;

1 is a perspective view showing a pin remover assembly 1 according to an embodiment of the present invention.

Referring to FIG. 1, the pin remover assembly 1 according to an embodiment of the present invention comprises a pin remover 10 and a beveler 20 as a rotary machine tool. The pin remover assembly 1 can perform this function by coupling the pin remover 10 to one end of the beveler 20 which is a rotating machine tool. The rotary machine tool is rotated, and the pin removing device 10 is rotated in conjunction with the rotation of the rotary machine tool to remove the pin 31. In one embodiment of the present invention, a representative example of a rotary machine tool will be described on the premise of a beveler 20 used for pipe shearing.

2 is a perspective view showing a pin remover 10 according to an embodiment of the present invention.

Referring to FIG. 2, the pin remover 10 according to an embodiment of the present invention includes an extension portion 13 and a cutting portion 11. Since the pin remover 10 is used to cut and remove the metal fin 31, a metal that has been heat-treated and increased in strength may be used as the material of the fin remover 10, but the material thereof is not limited thereto .

Cutting portion

The cutting portion 11 is a component to be removed by cutting the fin 31 formed on the outer circumferential surface of the heat transfer tube 30. [ The cutting portion 11 is formed protruding from one end of the extending portion 13 along the direction in which the extending portion 13 extends. The cutting portion 11 is formed along the circumference of one end of the extension portion 13 and may include a plurality of cutting edges 111 arranged at regular intervals along the circumference of one end of the extension portion 13. [ However, if necessary, only one cutting edge 111 may be disposed, or may be arranged at irregular intervals that are not constant.

The cutting edge 111 may be disposed so that a direction in which the extending portion 13 extends as described later and a direction in which the pin remover 10 rotates. This is because the pin 31 in contact with the cutting edge 111 is to be cut as the pin remover 10 rotates so that the pin 31 and the cutting edge 111 can smoothly contact each other.

Extension portion

The extension portion 13 is formed to extend in one direction. The extension portion 13 is formed by extending a toric body in a direction orthogonal to the toric body, and is formed in the form of an empty pipe. Therefore, the extension portion 13 has a cylindrical inner circumferential surface and an extension inner space 14 defined by the inner circumferential surface. The extension portion 13 does not have a closed inner space. The extension inner space 14 is opened in one direction in which the extension portion 13 extends. Accordingly, a cylindrical extension inner space 14 of an open top and bottom is formed inside the extension portion 13.

A flute 132 is formed on the outer peripheral surface of the extension portion 13 in a spiral shape. The grooves 132 may be formed in plural as shown in the drawing, and extend from one end of the extension portion 13 to the other end spirally. A portion projecting further in the radial direction of the extended portion 13 than the groove 132 is required in order to form the concave groove 132. This is called a land 131. [ The land 131 extends from the cutting edge 111 of the cutting portion 11 and is formed in a spiral shape like the groove 132 along the outer peripheral surface of the extension portion 13. [

The groove 132 is introduced for smoothly discharging the chip (not shown) formed by cutting the fin 31 by the cutting portion 11. The land 131 is formed in a spiral shape extending from the cutting edge 111 so that the chip generated by the cutting edge 111 is easily discharged along the groove 132. [ The groove 132 of the extension portion 13 is also usefully used for facilitating the supply of cutting oil to the portion where the cutting is performed. When the cutting oil is supplied to the groove 132 at a position spaced apart from the cutting portion 11, the cutting oil can be naturally supplied to the cutting portion 11 through the groove 132.

The direction of the spiral formed by the groove 132 along the extension portion 13 is determined in consideration of the rotating direction of the pin remover 10. It is preferable that a spiral is formed along the rotating direction of the pin remover 10 from the other end of the extended portion 13 to one end of the extended portion 13 when the cutting portion 11 is located at one end of the extended portion 13 do. The reason why the direction of the spiral is formed in this way is that the chip formed as a result of the cutting is smoothly discharged along the spiral.

Meanwhile, in order to rotate the pin remover 10 in conjunction with the rotation of the beveler 20, the pin remover 10 is engaged with the beveler 20. The other end of the extension portion 13 is engaged with the rotating working portion 22 of the beveler 20 to form the pin eliminator assembly 1 . In this case, a welding method or the like may be used, but the present invention is not limited thereto.

The pin remover 10 may further include a base 12 to bond the pin remover 10 to the beveler 20 in a detachable manner without involving structural modification of the beviler 20.

Base

The base portion 12 is connected to the other end of the extension portion 13 and functions as an intermediate leg between the extension portion 13 and the beveler 20. The base portion 12 is coupled to the rotatable working portion 22 of the beveler 20, which will be described later, and is connected to the other end of the extending portion 13.

A base engaging portion 121 that can be detachably coupled to the tool engaging portion 221 of the beveler 20 to be described later may be formed on the base portion 12. [ The base joint portion 121 is formed protruding from the base portion 12 along the direction in which the extension portion 13 extends.

3 is a bottom view of the pin remover 10 according to one embodiment of the present invention. The base joint portions 121 may be plurally arranged and may be disposed at regular intervals along the circumference of the base portion 12. [ In one embodiment of the present invention, the four base joints 121 are arranged to form a predetermined interval and angle. However, the position and the number of the base engaging portions 121 are not limited thereto. The coupling relationship between the base coupling portion 121 and the tool coupling portion 221 will be described later with reference to FIG.

Incidentally, the cylindrical inner peripheral surface of the extension portion 13 is formed to be large enough to cover the outer circumferential surface of the heat transfer tube 30. The inner diameter ID of the extension portion 13 is formed to be larger than the OD of the heat transfer tube 30 (ODT in FIG. 5). In other words, the pin remover 10 according to an embodiment of the present invention can not perform the pin removal operation for the heat transfer pipe 30 having an outer diameter larger than the inner diameter of the extension part 13. [

4 is a side view of the beveler 20 used in the pin remover assembly 1 according to one embodiment of the present invention.

Beveler (20) is a machine tool used to condition the ends of pipes already installed. The beveler 20 may be configured to be portable for ease of use in the field. Therefore, the beveler 20 may be provided with a handle 21 that can be gripped and manipulated by the user.

The beveler (20) includes a working portion (22). The working portion 22 is configured to be rotatable under the power by a portion where the main operation of the beveler 20 takes place. Thus, the working portion 22 may be connected to a driving device (not shown) such as a motor in the body of the beveler 20. When a beveler 20 is used for pipe beveling operation, a beveler tool (not shown) can be coupled to the eccentric position of the workpiece 22, and the workpiece 22 can be rotated The tool can chamfer the tip of the pipe.

In one embodiment of the present invention, the beveler 20 is not used for pipe beveling, so that the beveler 20 is engaged with the pin remover 10 instead of being coupled with the beveler tool. A tool engagement portion 221 for engaging the tool is formed at an eccentric position of the work portion 22 to which the tool for the beveler 20 is originally engaged. The base engaging portion 221 of the pin remover 10 is engaged with the tool engaging portion 221. Therefore, the tool engaging portion 221 can be formed in the shape of a concave recessed slot so that the protruding shape of the base engaging portion 121 can be inserted. However, in the case where the base coupling portion 121 is formed in a concave slot, the tool coupling portion 221 may protrude in the opposite direction, and the shape is not limited thereto. In the embodiment of the present invention, the number of the tool engaging portions 221 is four in total so as to correspond to the number of the base engaging portions 121, but the number of the tool engaging portions 221 is not limited thereto.

The tool engaging portion 221 is disposed at a position corresponding to the position of the base engaging portion 121. Thus, the base engaging portion 121 is inserted into the tool engaging portion 221 so that the working portion 22 and the base portion 12 are detachably coupled. As the working portion 22 and the base portion 12 are detachably coupled, the replacement of the pin remover 10 is facilitated. If the fin unit 12 having the same shape as that of the fin eliminator which can be used for the heat transfer pipe 30 having a different size from the extended part 13 and the cut part 11 is different, It can be used. It will also be easy to replace the old pin remover with a good pin remover.

The beveler (20) includes a shaft (23). The shaft 23 is a long rod-like component extending forward from the working portion 22 of the beveler 20.

The shaft 23 includes a clamp 24 on an outer circumferential surface in a region. The clamp 24 is a component formed by protruding a plurality of clamp blocks in the radial direction of the shaft 23 from the shaft 23. The clamp 24 is in contact with the inner circumferential surface 32 of the heat transfer pipe 30 and clamps or fixes the beveler 20 to the heat transfer pipe 30 when the clamp 24 is inserted into the inner circumferential surface 32 of the heat transfer pipe 30 . The plurality of clamping blocks may be arranged to form a predetermined angle with respect to the center of the shaft 23.

The shaft 23 may further include a clamp adjusting unit 25. [ The clamp adjusting portion 25 is a component that adjusts the extent to which the clamp block protrudes from the shaft 23 along the radial direction of the shaft 23. [

The shaft 23 may further include an inner shaft (not shown). The inner shaft is movable back and forth along the direction in which the shaft 23 extends in the shaft 23. The control of the forward and backward movement of the inner shaft is performed by the clamp adjusting unit 25, and the inner shaft is moved forward or backward as the clamp adjusting unit 25 is operated. Here, the forward movement means moving toward the distal end of the shaft 23, and the backward movement means moving toward the clamp adjusting portion 25 side.

When the inner shaft is advanced, the outer circumferential surface of the inner shaft can be brought into contact with one surface of the plurality of clamp block blocks located inside the shaft 23. When the one surface of the clamp block is tapered or the outer circumferential surface of the inner shaft is tapered, the inner shaft enters the plurality of clamp blocks as the inner shaft advances. As the inner shaft enters between the plurality of clamp blocks, the plurality of clamp blocks are pushed outward from the center of the shaft 23. The clamp block is projected to the outside along the radius of the shaft 23.

In one embodiment of the present invention, a method of adjusting the degree of protrusion of the clamp block using the inner shaft has been described, but the method of adjusting the degree of protrusion of the clamp block is not limited thereto.

A situation in which the pin eliminator assembly 1 including the beveler 20 and the beveler 20 is fixed to the heat transfer tube 30 using the clamp 24 will be described with reference to Fig.

5 is a view showing a state in which the pin eliminator assembly 1 according to an embodiment of the present invention clamps the heat transfer tube 30. FIG.

The base coupling portion included in the base portion 12 of the pin remover 10 is coupled to the tool coupling portion 221 included in the working portion 22 of the beveler 20 so as to constitute the pin eliminator assembly 1 do.

The shaft 23 enters the internal space of the heat transfer tube 30. [ The clamp 24 comes into contact with the inner circumferential surface 32 of the heat transfer tube 30. The plurality of clamp blocks can move in the radial direction of the heat transfer tube 30 and press the inner circumferential surface 32 of the heat transfer tube 30 in the radial direction as the operation portion of the clamp 24 is operated. The clamp block 24 moves in the direction of the center of the heat transfer tube 30 and the clamp 24 reduces the degree of pressing against the inner circumferential surface of the heat transfer tube 30 or the contact with the inner circumferential surface 32 Can be released.

The clamp 24 clamps the inner circumferential surface 32 of the heat transfer pipe so as to fix the pin eliminator assembly 1 with respect to the heat transfer pipe 30 so that the outer circumferential surface of the heat transfer pipe 30 enters the extension inner space 14. [ The minimum diameter of the clamp 24 formed by the clamp 24 is smaller than the inner diameter IDT of the heat transfer tube 30 so that the clamp 24 can clamp the inner circumferential surface 32 of the heat transfer tube. The outer diameter ODT of the heat transfer pipe 30 is smaller than or equal to the inner diameter ID of the extended portion 13 so that the outer circumferential surface of the heat transfer pipe 30 can enter the extended portion internal space 14. [ When the cutting edge 111 of the cutting portion 11 contacts the pin 31, the pin remover assembly 1 starts operating. The working portion 22 of the beveler 20 rotates.

6 is a view showing a state in which the fin remover 10 according to the embodiment of the present invention removes the fin 31 of the heat transfer pipe 30. FIG.

As the working portion 22 of the beveler 20 rotates, the base portion 12 coupled to the working portion 22 rotates. Since the base portion 12, the extension portion 13 and the cutting portion 11 form the integral pin remover 10, the cutting portion 11 also rotates as the base portion 12 rotates. The pin 31 in contact with the cutting edge 111 of the cutting portion 11 is cut and removed as the cutting portion 11 rotates. Although not shown, in the removing process of the pin 31, a residue such as chips is generated in addition to the removed pin 33.

The pin remover 10 must be advanced to remove the pin 31 after removing the pin 31 at which the cutting edge 111 first contacts. The pin eliminator assembly 1 of the present invention can cause the shaft 23 clamping the heat transfer tube 30 to be totally retracted so that the pin remover 10 is advanced. The backward movement of the shaft 23 may be automatically performed according to the rotation of the work unit 22, or a separate operation unit may be provided to allow the user to directly adjust the forward and backward extent.

Since the clamp 24 of the pin remover assembly 1 grasps the heat transfer tube 30 and the cutting is performed, the fin 31 can be efficiently removed in a stable posture.

As described above, the present invention is not necessarily limited to these embodiments because all the constituent elements constituting the embodiment of the present invention are described as being combined or operated as a single unit. That is, within the scope of the present invention, all of the components may be selectively coupled to one or more of them. Furthermore, the terms "comprises", "comprising", or "having" described above mean that a component can be implanted unless otherwise specifically stated, But should be construed as including other elements. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used terms, such as predefined terms, should be interpreted to be consistent with the contextual meanings of the related art, and are not to be construed as ideal or overly formal, unless expressly defined in the art.

The description above is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in this specification are intended to illustrate rather than limit the technical idea of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas which are within the scope of the same should be interpreted as being included in the scope of the present invention.

1: pin remover assembly 10: pin remover
11: cutting section 12:
13: extension part 14: inner space of the extension part
20: Beveler 21: Handle
22: working part 23: shaft
24: Clamp 25: Clamp adjuster
30: heat transfer pipe 31: pin
32: inner circumferential surface of the heat transfer pipe 33:
111: cutting edge 121: base joint part
131: Land 132: Home
133: extension portion inner peripheral surface 221: tool engagement portion
ID: Inner diameter of extension part IDT: Inner diameter of heat transfer pipe
ODT: Outer diameter of heat transfer pipe

Claims (8)

delete delete delete delete delete A pin eliminator assembly for removing a fin formed on an outer circumferential surface of a heat transfer tube,
A beveler having a rotatable working portion; And
And a pin removing device including a base part coupled to the working part of the beveler, an extension part having a cylindrical inner circumferential surface extending from the base part and covering the outer circumferential surface of the heat transfer tube, and a cutting part protruding from one end of the extending part, ,
The beveller further comprising a shaft passing through the center of the pin remover surrounded by the inner circumferential surface of the extension,
Wherein the shaft includes a clamp projecting radially from the shaft and contacting the inner circumferential surface of the heat conductive tube and being fixed to the inner circumferential surface of the heat conductive tube by pressing the inner circumferential surface of the heat conductive tube,
Wherein the cutting portion rotates as the pin contacts the pin and the work portion of the beveler rotates, thereby cutting the pin. The method according to claim 6,
Wherein the clamp comprises a plurality of clamp blocks,
The plurality of clamp blocks adjacent to each other with respect to the center of the shaft are arranged to form a predetermined angle,
Wherein the shaft further comprises a clamp adjuster that adjusts the degree to which the clamp block protrudes from the shaft. 8. The method of claim 7,
Wherein the shaft further includes an inner shaft in which the shaft moves back and forth along the direction in which the shaft extends in accordance with the operation of the clamp adjusting portion,
Wherein an outer circumferential surface of the inner shaft pushes the plurality of clamp blocks in a radial direction of the shaft when the inner shaft advances.

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