Dry diamond wire saw cutting method

Abstract

A system for collecting foreign substances generated when a reactor structure is cut in a dry manner and foreign substances adhered to a cutting line, the system can include: a transparent cover enclosing a reactor structure to be cut and having a plurality of cutting groove members provided on an outer peripheral surface thereof and adjusted to a height suitable for a cutting line; an air compressor for supplying compressed air; an air hose for transmitting the compressed air; a passage member provided in the plurality of cutting groove members, respectively, to receive the compressed air from the air hose so that the compressed air passes through the transparent cover and is sprayed at the cutting line; a filling member surrounding at least a portion of an inner peripheral surface of each of the plurality of cutting groove members while surrounding an outer peripheral surface of at least a portion of each passage member so as to have a frictional force with respect to each passage member; and a discharge portion provided near an end of the reactor structure surrounding the reactor structure in a rotational direction of the cutting line so as to discharge the foreign substances.

Description

TECHNICAL FIELD

[0001] The present application relates to a dry cutting method using a diamond wire saw, and more particularly, to a dust collection system for collecting foreign substances generated when cutting a structure using a dry cutting method using a diamond wire saw and a wire saw apparatus for cutting a structure using a dry cutting method. BACKGROUND

[0002] Generally, a structure constructed using concrete or the like can be cut by using a cutting apparatus using a diamond wire. A cutting wire configured to cut a concrete structure, rock, or the like can be easily contaminated with various foreign substances such as dust, water, and sludge during cutting. In order to cut a concrete structure or the like neatly, it is necessary to remove foreign substances present on the surface of the wire.

[0003] However, there is no apparatus for removing foreign substances attached to the surface of a cutting wire, and it is not easy for a user to manually remove foreign substances from the surface of a long wire. Therefore, there is a need for a wire dust collection system / dust collection apparatus for more effectively removing foreign substances such as dust or the like attached to the surface of a diamond wire.

[0004] A conventional dust collection system uses a dust collection container, a dust collection hood, and a high-output motor for collecting dust in order to collect foreign substances generated from the cutting plane of a structure in a state in which the cutting plane of the structure is hermetically sealed. In addition, when the structure is a structure having a large size, such as a nuclear power plant, a high-output, large-size dust collection apparatus is customized and used. However, such a large-size dust collection apparatus is expensive and requires a long time to manufacture. That is, a large-size dust collection apparatus is inefficient.

[0005] In addition, the conventional dust collection system focuses only on collecting foreign substances from a structure in a state in which the cutting plane of the structure is hermetically sealed. To this end, a dust collection container is provided below the cutting plane in order to collect dust. Therefore, it is not possible to remove foreign substances attached to a cutting wire. Foreign substances attached to a cutting wire also cause considerable environmental pollution in addition to foreign substances separated from the cutting plane of a structure during cutting, and thus complete removal of foreign substances attached to a cutting wire is also important. However, a dust collection system or a dust collection hood of this type has not been proposed. SUMMARY

[0006] TECHNICAL PROBLEM

[0007] An object of the present application is to provide a dust collection system for collecting foreign substances generated when cutting a structure and a wire saw apparatus for cutting a structure using a dry cutting method.

[0008] The object of the present application is not limited to the above-mentioned object, and other unmentioned objects will be clearly understood by those skilled in the art to which the present application pertains based on the following description.

[0009] TECHNICAL SOLUTION

[0010] To achieve this object, a dust collecting system for collecting foreign matter generated during cutting of a nuclear power plant structure and foreign matter attached to a cutting line in a dry state includes a cover configured to hermetically seal the nuclear power plant structure as a target to be cut, the cover being provided at an outer peripheral surface thereof with a plurality of cutting recess members adjusted in height with respect to the cutting line, the cover being made of a transparent material; an air compressor configured to supply compressed air; an air hose configured to deliver the compressed air; a passage member provided in each of the plurality of cutting recess members, the passage member being configured to receive the compressed air so that the compressed air is sprayed to the cutting line through the cover made of the transparent material; a filling member configured to wrap at least a portion of an inner peripheral surface of each of the plurality of cutting recess members while wrapping at least a portion of an outer peripheral surface of the passage member, so that a frictional force is formed between the passage member and the filling member; and a discharge portion provided near an end portion of the nuclear power plant structure around a rotation direction of the cutting line, the discharge portion being configured to discharge the foreign matter.

[0011] The passage member can be configured such that a length of the passage member is adjustable so as to extend through the cover.

[0012] The passage member can include a pipe.

[0013] The cover made of the transparent material can include a transparent acrylic cover.

[0014] The plurality of cutting recess members can be provided at a predetermined interval in a direction parallel to the ground along the outer peripheral surface of the cover, and a vertical height of each of the plurality of cutting recess members can be equal to a vertical height of the cutting line or can be different from the vertical height of the cutting line within a predetermined range.

[0015] The filling member can include a filling member made of rubber.

[0016] In an aspect of the present application, a wire saw apparatus for using a dry cutting structure includes a main roller, a first roller unit located at one side of the structure, the first roller configured to allow a cutting wire introduced from the main roller to pass through the first roller so that the cutting wire is guided to the structure so as to surround the structure, and a second roller unit located at the other side of the structure, the second roller configured to allow the cutting wire moving while surrounding the structure to pass through the second roller so that the cutting wire is delivered to the main roller, wherein the first roller unit includes a first fixed roller, a first auxiliary roller configured so that at least a portion of the first auxiliary roller is in contact with an outer peripheral surface of the first fixed roller, a first guide roller configured to guide the cutting wire introduced from the main roller to the first fixed roller, and a second auxiliary roller configured so that at least a portion of the second auxiliary roller is in contact with an outer peripheral surface of the first guide roller, and the second roller unit includes a second fixed roller configured to allow the cutting wire moving while surrounding the structure to pass through the second fixed roller, a third auxiliary roller configured so that at least a portion of the third auxiliary roller is in contact with an outer peripheral surface of the second fixed roller, a second guide roller configured to guide the cutting wire introduced from the second fixed roller to the main roller, and a fourth auxiliary roller configured so that at least a portion of the fourth auxiliary roller is in contact with an outer peripheral surface of the second guide roller.

[0017] The first roller unit can include a first support portion configured to support the first fixed roller and the first auxiliary roller, a first fixing portion coupled to the support portion, the first fixing portion configured to fix the first roller unit to the structure, a first non-rotating frame located between the first fixed roller and the first guide roller, the first non-rotating frame having a hole formed therethrough through which the cutting wire passes, the first non-rotating frame formed in a cylindrical shape, the first non-rotating frame being non-rotatable, and a first rotating frame inserted into the non-rotating frame, the first rotating frame formed in a cylindrical shape, the first rotating frame being rotatable.

[0018] The second roller unit can include a second support portion configured to support the second fixed roller and the third auxiliary roller, a second fixing portion coupled to the support portion, the second fixing portion configured to fix the second roller unit to the structure, a second non-rotating frame located between the second fixed roller and the second guide roller, the second non-rotating frame having a hole formed therethrough through which the cutting wire passes, the second non-rotating frame formed in a cylindrical shape, the second non-rotating frame being non-rotatable, and a second rotating frame inserted into the non-rotating frame, the second rotating frame formed in a cylindrical shape, the second rotating frame being rotatable.

[0019] The first rotating frame can be configured to adjust an angle between the first fixed roller and the first guide roller.

[0020] The second rotating frame can be configured to adjust an angle between the second fixed roller and the second guide roller.

[0021] The wire saw apparatus can further include a cover connected to the ground at one side of the structure, the cover being configured to airtightly seal the first roller unit, the cover being made of a transparent material, and a cover connected to the ground at the other side of the structure, the cover being configured to airtightly seal the second roller unit, the cover being made of a transparent material.

[0022] The first roller unit and the second roller unit can be configured to allow the cutting wire to pass through the first roller unit and the second roller unit while cutting the structure in a direction parallel to the ground.

[0023] The structure can include a nuclear power plant structure.

[0024] In another aspect of the present invention, a wire saw apparatus for cutting a structure using a dry cutting method includes a main roller, a first roller unit located at one side of the structure, the first roller being configured to allow a cutting wire introduced from the main roller to pass through the first roller so that the cutting wire is guided to the structure so as to surround the structure, and a second roller unit located at one side of the structure together with the first roller unit so as to be installed at a different height from the first roller unit, the second roller being configured to allow the cutting wire moving while surrounding the structure to pass through the second roller so that the cutting wire is delivered to the main roller, wherein the first roller unit includes a first fixed roller, a first auxiliary roller configured such that at least a portion of the first auxiliary roller is in contact with an outer circumferential surface of the first fixed roller, a first guide roller configured to guide the cutting wire introduced from the main roller to the first fixed roller, and a second auxiliary roller configured such that at least a portion of the second auxiliary roller is in contact with an outer circumferential surface of the first guide roller, and the second roller unit includes a second fixed roller configured to allow the cutting wire moving while surrounding the structure to pass through the second fixed roller, a third auxiliary roller configured such that at least a portion of the third auxiliary roller is in contact with an outer circumferential surface of the second fixed roller, a second guide roller configured to guide the cutting wire introduced from the second fixed roller to the main roller, and a fourth auxiliary roller configured such that at least a portion of the fourth auxiliary roller is in contact with an outer circumferential surface of the second guide roller.

[0025] The first roller unit can include a first support portion configured to support the first fixed roller and the first auxiliary roller, a first fixing portion coupled to the support portion, the first fixing portion configured to fix the first roller unit to the structure, a first non-rotating frame between the first fixed roller and the first guide roller, the first non-rotating frame having a hole formed therethrough through which the cutting wire passes, the first non-rotating frame formed in a cylindrical shape, the first non-rotating frame being non-rotatable, and a first rotating frame inserted into the non-rotating frame, the first rotating frame formed in a cylindrical shape, the first rotating frame being rotatable.

[0026] The second roller unit can include a second support portion configured to support the second fixed roller and the third auxiliary roller, a second fixing portion coupled to the support portion, the second fixing portion configured to fix the second roller unit to the structure, a second non-rotating frame between the second fixed roller and the second guide roller, the second non-rotating frame having a hole formed therethrough through which the cutting wire passes, the second non-rotating frame formed in a cylindrical shape, the second non-rotating frame being non-rotatable, and a second rotating frame inserted into the non-rotating frame, the second rotating frame formed in a cylindrical shape, the second rotating frame being rotatable.

[0027] Advantageous effects

[0028] In the dust collecting system according to the present application, compressed air is sprayed to the cutting wire, whereby foreign matter attached to the cutting wire and foreign matter present on the cutting plane of the structure can be removed.

[0029] In the dust collecting system according to the present application, compressed air is sprayed using an air-spraying type dust collecting method, and a discharge portion is provided in the vicinity of a position where foreign matter is present according to the air pressure and the rotation direction of the cutting wire, whereby foreign matter can be collected and discharged without a high-output, large-capacity dust collecting apparatus.

[0030] In the dust collecting system according to the present application, compressed air is sprayed to the cutting wire using an air-spraying type dust collecting method, whereby heat generated in the cutting wire during cutting can also be removed. Thus, the cutting force of the cutting wire can be quickly recovered. In addition, the life of the cutting wire can also be increased, and thus costs can be reduced.

[0031] In the dust collecting system according to the present application, dust collecting is performed using an air-spraying type dust collecting method, whereby the dust collecting effect can be further improved while greatly reducing the cost of manufacturing a dust collecting apparatus.

[0032] In the wire saw device according to the invention, an auxiliary roller is provided at each of the fixed rollers whose rotation axis is fixed in each roller unit and the guide rollers rotatably connected to the rotation axis, thereby preventing the separation of the cutting line and thus significantly improving the cutting efficiency.

[0033] The effects that can be obtained from the present invention are not limited to those described above, and based on the following description, those skilled in the art will clearly understand other unmentioned effects. Attached Figure Description

[0034] Figure 1 This is a plan view of a dust collection system used to collect foreign objects generated by horizontal cutting of the structure.

[0035] Figure 2 This is a view used to describe the air compressor 140 used in the air jet dust collection system according to the present invention.

[0036] Figure 3 This is a view showing the cutting recess member 115, the filling member 150, and the channel member 120 included in the dust collection system according to the invention.

[0037] Figure 4 This is a schematic view showing the internal structure of the cut recess member 115.

[0038] Figure 5 This is a view showing in detail the internal structure of the cut recess member 115.

[0039] Figure 6 This is a view showing in detail the connection structure of the filling member 150.

[0040] Figure 7 This is a front view of a dust collection system used to collect foreign objects generated by vertical cutting of the structure.

[0041] Figure 8 This is a view showing in detail the roller unit of the wire saw associated with the dust collection system according to the present invention. Detailed Implementation

[0042] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The detailed description disclosed below is consistent with the accompanying drawings. Figure 1 The illustrations show exemplary embodiments of the invention, but do not reveal unique embodiments that can be implemented. The following detailed description includes specific details to provide a full understanding of the invention. However, those skilled in the art will understand that the invention can be practiced without these specific details.

[0043] The detailed description of the present application, which will be made below, illustrates specific embodiments in which the present application can be implemented, and refers to the accompanying drawings. The detailed description of these embodiments enables one skilled in the art to implement the present application. It is understood that various embodiments of the present application are different from each other, but are not necessarily mutually exclusive. For example, the specific shape, structure, and features of the embodiments described herein can be implemented as another embodiment without departing from the spirit and scope of the present application. In addition, it should be understood that the position or arrangement of each element in each disclosed embodiment can be changed without departing from the spirit and scope of the present application. Therefore, the following detailed description is not limiting, and the scope of the present application is limited only by the appended claims and all equivalents thereof, as long as the present application is properly described. In the drawings, like reference numerals indicate the same or similar functions in several aspects.

[0044] In some cases, in order to avoid the concept of the present application from being unclear, known structures and devices can be omitted, or each structure and device will be shown in the form of a block diagram including its core function. In addition, throughout this specification, the same elements are denoted by the same reference numerals.

[0045] Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings, so that those of ordinary skill in the art to which the present application pertains can easily implement the present application.

[0046] The present application proposes a dust collection system for effectively collecting foreign matter, dust, etc. generated when cutting any one of various structures such as a dangerous structure, for example, a nuclear power plant, a structure having a large size, a structure having a large length, and a concrete structure, using a wire saw machine.

[0047] Figure 1 is a plan view illustrating a dust collection system for collecting foreign matter generated due to horizontal cutting of a structure.

[0048] Referring to Figure 1 According to the dust collection system of the present application, the dust collection system can include a cover (or a sealing cover) 110, a passage member 120, a discharge portion 130, an air compressor 140 (not shown), and a filler member 150 made of rubber.

[0049] is a plan view illustrating a dust collection system for collecting foreign matter generated by a cutting wire configured to cut a structure such as concrete. Figure 1 is a plan view illustrating a case in which a structure 200 is cut in a direction parallel to the ground, that is, a horizontal direction.

[0050] In the present application, a wire configured to cut the structure 200 is referred to as a cutting wire 300. The cutting wire 300 can be a wire saw. As an example, the cutting wire 300 can be a diamond wire saw.

[0051] As Figure 1 The cover 110 of the dust collection system also hermetically seals the roller units 410 and 420 configured to drive the cutting wire 300 of the wire saw, as shown in

[0052] In the wire saw machine, the cutting wire 300 can be introduced into the structure 200 through the first roller unit 410, and the cutting wire 300 can be transferred to the main roller of the wire saw through the second roller unit 420. In Figure 1 Each of the first roller unit 410 and the second roller unit 420 is fixed to the wall of the structure 200 by an anchor bolt or the like, as shown in

[0053] The cover 110 hermetically seals the structure 200 as a target to be cut, and a plurality of cutting recess members 115 can be provided at the outer peripheral surface of the cover 110 or the outer surface of the cover 110. The cover 110 can be configured to hermetically seal the remaining portion of the structure 200 except for the plurality of cutting recess members 115. In Figure 1 As an example, the structure 200 is illustrated as being formed in a quadrangular shape, and thus the cover 110 can also be formed in a quadrangular shape so as to hermetically seal the outer surface of the structure 200. Although the material for the cover 110 is not limited, the cover can be made of a metal sheet or a material capable of allowing the structure 200 in the cover 110 to be visible therethrough. For example, a transparent acrylic cover can be used. When the cover 110 is made of the above-mentioned designated material, the structure 200 in the cover 110 is visible, whereby the vertical height of the cutting wire 300, the cutting recess member 115, and the passage member 120 can be aligned, and thus the dust collection system can be more effectively operated.

[0054] Further, as Figure 2As shown on the right, the cutting wire 300 passes through the first roller unit 410 via a cover 110 configured to cover the first roller unit 410, passes through the second roller unit 420 via a cover 110 configured to cover the second roller unit 420, and moves to the main roller 405 of the wire saw. At this time, the cover 110 configured to cover the first roller unit 410 has a filling member 158 in its cover recess, and the cover 110 configured to cover the second roller unit 420 also has a filling member 158 in its cover recess. Each filling member 158 is configured to prevent dust from being introduced into a corresponding cover of the cover 110 configured to cover the first roller unit 410 and the cover 110 configured to cover the second roller unit 420, and to protect a corresponding cover recess in the cover recess. For example, each filling member may be made of elastic polyurethane resin.

[0055] Figure 2 This is a view used to describe the air compressor 140 used in the air jet dust collection system according to the present invention.

[0056] The reason for providing multiple cutting recesses 115 on the outer surface of the cover 110 is that compressed air needs to be injected through the cutting recesses 115. A channel member 120 is provided in each of the multiple cutting recesses 115 in a direction toward the cutting line 300, such that compressed air supplied by the compressor 140 is injected through the cover 110 onto the cutting line 300. A pipe can be used as an example of the channel member 120. The channel member 120 can be implemented in any shape of various forms, such as a circular shape.

[0057] Air compressor 140 supplies compressed air to the plurality of cut recess members 115. There are no particular restrictions on the location of the air compressor 140. However, as... Figure 1 As shown, the air compressor 140 can be mounted on the ground, and for worker convenience, a plurality of air hoses 145 can be connected to the air compressor 140. Each of the air hoses 145 is inserted into a channel member 120 in a corresponding cutting recess member 115. Compressed air generated by the air compressor 140 is supplied to the cutting recess member 115 through the plurality of air hoses 145 and is injected into each cutting recess member 115 through the channel member 120 in a direction toward the cutting line 300.

[0058] When structure 200 is initially cut, the cutting line 300 follows the direction of... Figure 1 The line indicated by the "I" in the diagram surrounds structure 200. The cutting line 300 horizontally cuts structure 200 while the cutting line rotates in a predetermined direction due to the wire saw being driven (as an example, in...). Figure 3When the structure 200 is cut in the counterclockwise direction (horizontally), the quadrangular corners of the structure 200 are first cut. As the structure 200 is cut by the rotation of the cutting line 300, the cutting line 330 moves toward the inside of the structure 200 and follows the curved line indicated by "II" around the structure 200. As the structure 200 is further cut, the cutting line 330 moves toward the further inside of the structure 200 and follows the line indicated by "III" around the structure 200. As the structure 200 is cut as described above, the shape of the cutting line 300 changes from the line I to the line II and from the line II to the line III.

[0059] As the structure 200 is cut as described above, the distance (straight-line distance) between the cutting recess member 115 and the cutting line 300 increases, particularly the distance to the opposite corners of the structure 200. If the length of the passage member 120 is fixed, but the distance between the cutting recess member 115 and the cutting line 300 increases, foreign matter attached to the cutting line 300 can not be easily removed when compressed air is injected to the cutting line 300 through the passage member 120. To this end, the passage member 120 is configured such that the length of the passage member 120 can extend in the direction toward the cutting line 300 through the cover 110 (or the thickness of the cover 110), and such that the length of the passage member can be adjusted. The passage member 120 located near each of the opposite corners of the structure 200 is configured to further extend in the direction toward the cutting line 300 as the structure 200 is cut.

[0060] Figure 4 FIG. 1 is a view showing a dust collection system according to the present application, and Figure 3 FIG. 2 is a view schematically showing the internal structure of the cutting recess member 115.

[0061] Referring to Figure 4 The filling member 150 (e.g., a filling member made of rubber) is configured to wrap at least a portion of the inner circumferential surface (inner surface) of each of the plurality of cutting recess members 115. Hereinafter, for convenience of description, the filling member made of rubber will be described by way of example as the filling member 150.

[0062] The filling member 150 is configured to wrap at least a portion of the inner circumferential surface of the passage member 120, such that a frictional force is formed between the filling member and the passage member 120, thereby fixing the passage member 120 even when compressed air is injected into the passage member 120. When the cutting line 300 cuts the structure 200 while rotating, a pressure or a vibration can be applied to the cutting recess member 115. In this case, when the filling member 150 is made of rubber, the filling member can absorb an external force, such as a pressure or a vibration, applied to the cutting recess member 115, thereby more firmly supporting the passage member 120.

[0063] The air compressor 140 supplies compressed air to the passage member 120 through the air hose 145. A valve 160 can be provided in the passage member 120 to regulate the amount of compressed air introduced through the air hose 145 or to allow or prevent the supply of compressed air based on its opening and closing.

[0064] Referring to Figure 1 The cover 110 made of a metal sheet or a transparent acrylic resin hermetically seals the structure 200, the cutting recess member 115 is provided at the cover 110, and the rubber filling member 150 is provided in the cutting recess member 115. As an example, the passage member 120 can be a metal pipe having an outer diameter of 10 mm. A rubber hole 156 is provided in the rubber filling member 150. As an example, the rubber hole 156 can have a diameter of 9 mm. That is, the diameter of the passage member 120 is configured to be greater than the diameter of the rubber hole 156 within a predetermined range. The reason for this is that, when the diameter of the passage member 120 is greater than the diameter of the elastic rubber hole 156 within a predetermined range, a frictional force can be maintained between the passage member 120 and the rubber hole 156 in a state in which the passage member is fitted in the rubber hole, thereby improving firmness.

[0065] As shown in Figure 1 The cutting recess member 115 can be provided at a predetermined interval along the outer circumferential surface of the cover 110. Since the shape of the structure 200 is quadrangular, the cover 110 also needs to have four surfaces in order to hermetically seal the structure 200. As shown in Figure 1 As an example, a plurality of cutting recess members 115 can be provided for each surface, and the cutting recess members 115 can be spaced apart from each other by a predetermined distance. In Figure 1 The cutting line 300 cuts the structure 200 while rotating in a counterclockwise direction at a certain height with respect to the structure 200. At this time, the cutting line 300 rotates while maintaining its tension, thereby uniformly maintaining the vertical height of the cutting line. Therefore, the cutting recess members 115 provided at each surface of the cover 110 can have the same vertical height from the ground, or can differ from each other in vertical height within a predetermined range.

[0066] In Figure 1 , each cutting recess member 115 is shown to be disposed at a specific vertical height; however, the horizontal cutting height of the cutting line 300 can be changed in order to cut the structure 200. That is, in Figure 1 , the cutting recess members 115 disposed at a specific height of the structure 200 are illustrated. However, when the vertical height of the horizontal cutting of the structure 200 is changed, Figure 1 , the dust collection system shown in

[0067] When the air compressor 140 injects compressed air into the cutting recess member 115, the compressed air must move along the passage member 120 and must be sprayed to the cutting line 300 so that foreign matter (dust) attached to the outer peripheral surface of the cutting line 300 and foreign matter, dust, etc. generated during cutting of the structure 200 can be immediately removed. Therefore, the vertical height of the cutting recess member 115 and the vertical height of the cutting line 300 must be equal to each other or must be different from each other within a predetermined range. If not, it is difficult to completely remove the foreign matter attached to the outer peripheral surface of the cutting line 300.

[0068] Further, since the cutting line 300 cuts the structure 200 while rotating, high heat is generated from the cutting line 300. When the air compressor 140 sprays compressed air through the passage member 120, the heat generated from the cutting line 300 during cutting can also be removed, whereby the cutting force of the cutting line 300 can be quickly recovered, and thus the cutting efficiency can be improved. Further, since the heat is removed during cutting, the life of the cutting line 300 can also be increased, and thus the working cost can be reduced.

[0069] As shown in Figure 1 , the cutting line 300 cuts the structure 200 while rotating in the counterclockwise direction. Therefore, when compressed air is sprayed to the cutting line 300, foreign matter attached to the cutting line 300 falls downward due to gravity while moving in the rotation direction of the cutting line 300 due to the air pressure caused by the spraying of the compressed air and the rotation force caused by the rotation of the cutting line 300. As described above, since the compressed air is sprayed when the cutting line 300 performs cutting while rotating, both the foreign matter attached to the cutting line 300 and the foreign matter generated during cutting and attached to the structure fall downward while moving in the rotation direction of the cutting line 300.

[0070] To effectively collect such foreign matter, it is necessary to position the discharge portion 130 near the end of the structure 200 in the rotation direction of the cutting wire 300 around the structure 200. Since the cover 110 configured to hermetically seal the second roller unit 420 is connected to the ground, and thus performs a function of preventing dispersion of foreign matter to the outside, the cover functions as a dust collector. The foreign matter can be introduced into the cover 110 configured to surround the second roller unit 420 by compressed air and rotation of the cutting wire 300, and the foreign matter can be discharged through the discharge portion 130. More specifically, in Figure 5 the discharge portion 130 can be provided below the cutting wire 300 and the second roller unit 420.

[0071] Since the compressed air is injected to the cutting wire 300 rotating in the counterclockwise direction through the passage member 120 of each of the plurality of cutting recess members 115, the foreign matter also moves in the counterclockwise direction by air pressure, falls down, and finally reaches near the second roller unit 420. In the dust collection system according to the present application, dust and foreign matter can be automatically collected to the discharge portion 130, and easily discharged. Therefore, it is possible to greatly reduce the cost of manufacturing the dust collection apparatus, and reduce the installation, operation, and dismounting expenses of the dust collection apparatus.

[0072] Figure 6 is a view showing the internal structure of the cutting recess member 115 in detail, in which a longitudinal sectional view (a) of the cutting recess member and a right side view (b) of the cutting recess member 115 and the filling member 150 are shown. Figure 5 is a view showing the coupling structure of the filling member 150 in detail.

[0073] As shown in Figure 5 The cutting recess member 115 is bent from the cover 110 made of a metal sheet, and can be integrally formed with the cover 110 as shown in (a). The cutting recess member 115 has an open side surface protruding in a stepped shape, and a transparent plate 117 made of a transparent material such as acrylic resin can be coupled to the open side surface by fastening using a bolt and a nut. The central portion of the transparent plate 117 is open so that the filling member 150 can be mounted by insertion. The passage member 120 is inserted through the rubber hole 156 formed through the filling member 150, and the passage member 120 can move with respect to the filling member while being sealed by the filling member 150. Therefore, when the cutting wire 300 cuts the structure 200 while rotating, the end portion of the passage member 120 can move close to the cutting wire 300, whereby compressed air can be injected just in front of the cutting wire.

[0074] As shown in Figure 6As shown in (b), each of the transparent plate 117 and the rubber filler 155 can be formed in a rectangular shape so that a plurality of rubber holes 156 are arranged. In this drawing, an embodiment in which four rubber holes 156 are formed in one rubber filler 155 is shown; however, the number of rubber holes 156 is not limited thereto. That is, depending on the size of the structure, a number of rubber holes, for example, two or more rubber holes, can be formed in one rubber filler 155. Also, a plurality of transparent plates 117 can be continuously coupled to one cutout member 115.

[0075] As shown in (b), each of the transparent plate 117 and the rubber filler 155 can be formed in a rectangular shape so that a plurality of rubber holes 156 are arranged. In this drawing, an embodiment in which four rubber holes 156 are formed in one rubber filler 155 is shown; however, the number of rubber holes 156 is not limited thereto. That is, depending on the size of the structure, a number of rubber holes, for example, two or more rubber holes, can be formed in one rubber filler 155. Also, a plurality of transparent plates 117 can be continuously coupled to one cutout member 115. Figure 7 As shown in (b), each of the transparent plate 117 and the rubber filler 155 can be formed in a rectangular shape so that a plurality of rubber holes 156 are arranged. In this drawing, an embodiment in which four rubber holes 156 are formed in one rubber filler 155 is shown; however, the number of rubber holes 156 is not limited thereto. That is, depending on the size of the structure, a number of rubber holes, for example, two or more rubber holes, can be formed in one rubber filler 155. Also, a plurality of transparent plates 117 can be continuously coupled to one cutout member 115.

[0076] The pipe bolt member 151 is formed in an external shape of a bolt shape. A space for insertion of the rubber filler 155 can be formed in a central portion of the pipe bolt member, and opposite end portions of the pipe bolt member in a longitudinal direction can be open. A screw thread for fastening with the nut member 153 can be formed at an outer peripheral surface of the pipe bolt member 151.

[0077] A screw thread can be formed at an inner peripheral surface of the nut member 153 so that the nut member can be fastened to the pipe bolt member 151. The pipe bolt member 151 can be inserted through a through-hole of the transparent plate 117, and the nut member 153 is fastened to the pipe bolt member inside the transparent plate 117, whereby the pipe bolt member can be fixed. A rubber gasket can be interposed between an inner surface of the transparent plate 117 and the nut member 153, whereby the inside of the cutout member 115 can be air-tightly isolated from the outside.

[0078] The cap member 154 can be provided with a through-hole in a center thereof through which the passage member 120 extends, and a screw thread can be formed at an outer peripheral surface of the cap member. The screw thread can be fastened to a recess formed in a head portion of the pipe bolt member 151, whereby the cap member can be fixed to the pipe bolt member. To this end, a screw thread can also be formed at an inner peripheral surface of the recess in the head portion of the pipe bolt member 151. The plastic cap member 154 can be formed separately, or the cap member 154 can be integrally formed with the rubber filler 155.

[0079] In the coupling structure of the filling member 150, the filling member 150 is firmly mounted to the transparent plate 117. Therefore, even if the passage member 120 forcibly fitted in the rubber hole 156 slides, the filling member 150 can be firmly fixed while maintaining its sealing performance.

[0080] Figure 7is a front view illustrating a dust collection system for collecting foreign matter generated due to vertical cutting of a structure.

[0081] Referring to Figure 1 , in the same manner as shown in Figure 7 , the dust collection system according to the present application can include a cover (or a sealing cover) 110, a passage member 120, a discharge portion 130, an air compressor 140 (not shown), and a filling member 150.

[0082] is a front view illustrating a dust collection system for collecting foreign matter generated by a cutting line configured to cut a structure such as concrete. Figure 7 is a front view illustrating a case in which the structure 200 is cut in a direction perpendicular to the ground, that is, a vertical direction. That is, the standing structure 200 is cut in the vertical direction.

[0083] As shown in Figure 1 , the cover 110 of the dust collection system also hermetically seals the roller units 410 and 420 configured to drive the cutting line 300. In the dust collection system, the reason why the cover 110 hermetically seals the first roller unit 410 and the second roller unit 420 alone is that it is necessary to prevent dust or foreign matter separated from the cutting line due to the injected compressed air from being dispersed from the structure 200. That is, the dust or foreign matter is discharged only through the discharge portion 130.

[0084] In a wire saw machine (for example, a diamond wire saw (DWS)), in the same manner as the horizontal cutting of Figure 1 , the cutting line 300 can be introduced into the structure 200 through the first roller unit 410, and the cutting line 300 can be transferred to the main roller of the wire saw through the second roller unit 420. In Figure 7 , the first roller unit 410 and the second roller unit 420 are located at opposite sides of the structure 200 in the horizontal direction for horizontal cutting. However, in Figure 7 , the first roller unit 410 and the second roller unit 420 are provided in the vertical direction for vertical cutting. That is, the first roller unit 410 is positioned higher than the second roller unit 420 in the vertical direction. In the same manner, Figure 7 , each of the first roller unit 410 and the second roller unit 420 of

[0085] The cover 110 hermetically seals the structure 200 that is a target to be cut, and a plurality of cutting recess members 115 can be provided at an outer peripheral surface of the cover 110 or an outer surface of the cover 110. The cover 110 can be configured to hermetically seal the remaining portion of the structure 200 except for the plurality of cutting recess members 115. In Figure 7In the illustration, structure 200 is shown as being formed in a quadrilateral shape, and therefore cover 110 can also be formed in a quadrilateral shape to hermetically seal the outer surface of structure 200. While the material used for cover 110 is not limited, the cover can be made of sheet metal or a material that allows structure 200 within cover 110 to be visible. For example, a transparent acrylic cover can be used.

[0086] The reason for providing multiple cutting recesses 115 on the outer surface of the cover 110 is that compressed air needs to be injected through the cutting recesses 115. An air compressor 140 supplies compressed air to the multiple cutting recesses 115. The air compressor 140 can be configured for each of the cutting recesses 115.

[0087] Channel member 120 is disposed in each of the plurality of cutting recess members 115 in a direction toward the cutting line 300, such that compressed air supplied by compressor 140 is injected through shroud 110 onto the cutting line 300. A metal pipe may be used as an example of channel member 120. Channel member 120 can be implemented in any shape of various forms, such as a circular shape.

[0088] When structure 200 is initially cut, the cutting line 300 follows the direction of... Figure 7 The line indicated by "I" in the middle surrounds structure 200. The cutting wire 300 vertically cuts structure 200 while rotating in a predetermined direction due to the wire saw (DWS) being driven (as an example, in...). Figure 7 When cutting vertically (counterclockwise) along the middle, the upper quadrilateral corner of structure 200 is cut first. As structure 200 is cut by the rotation of cutting line 300, cutting line 330 moves inward toward structure 200 and surrounds structure 200 along the curved line indicated by "II". When structure 200 is further cut, cutting line 330 moves even inward toward structure 200 and surrounds structure 200 along the line indicated by "III". As structure 200 is cut as described above, the shape of cutting line 300 changes from line I to line II and from line II to line III.

[0089] When the structure 200 is cut as described above, the distance (straight-line distance) between the cutting recess member 115 and the cutting line 300 increases, particularly the distance from the opposite corners of the structure 200. If the length of the passage member 120 is fixed, but the distance between the cutting recess member 115 and the cutting line 300 increases, foreign matter attached to the cutting line 300 can not be easily removed when compressed air is injected to the cutting line 300 through the passage member 120. To this end, the passage member 120 is configured such that the length of the passage member 120 can extend in the direction toward the cutting line 300 through the cover 110 (or the thickness of the cover 110), and such that the length of the passage member can be adjusted. The passage member 120 located near each of the opposite corners of the structure 200 is configured to further extend in the direction toward the cutting line 300 when the structure 200 is cut.

[0090] The rubber filling member 150 is configured to wrap at least a portion of the inner circumferential surface (inner surface) of each of the plurality of cutting recess members 115. The filling member 150 is configured to wrap at least a portion of the inner circumferential surface of the passage member 120, such that a frictional force is applied between the filling member and the passage member 120, thereby fixing the passage member 120 even when compressed air is injected into the passage member 120. When the cutting line 300 cuts the structure 200 while rotating, a pressure or a vibration can be applied to the cutting recess member 115. In this case, when the filling member 150 is made of rubber, the filling member can absorb an external force, a pressure, or a vibration applied to the cutting recess member 115, thereby the passage member 120 can be more firmly supported.

[0091] As shown in FIG. 1, the cutting recess member 115 can be provided at a predetermined interval along the outer circumferential surface of the cover 110. Since the shape of the structure 200 is quadrangular, the cover 110 also needs to have four surfaces in order to hermetically seal the structure 200. As shown in FIG. 1, as an example, a plurality of cutting recess members 115 can be provided for each surface, and the cutting recess members 115 can be spaced apart from each other by a predetermined distance. Figure 7 Figure 7 As shown in FIG. 1, as an example, a plurality of cutting recess members 115 can be provided for each surface, and the cutting recess members 115 can be spaced apart from each other by a predetermined distance.

[0092] When the air compressor 140 injects compressed air into the cutting recess member 115, the compressed air can move along the passage member 120 and can be injected to the cutting line 300, thereby foreign matter can be completely removed.

[0093] ​Furthermore, since the cutting wire 300 cuts the structure 200 while rotating, high heat is generated from the cutting wire 300. When the air compressor 140 injects compressed air through the channel member 120, the heat generated by the cutting wire 300 during cutting can be removed, thereby quickly restoring the cutting force of the cutting wire 300 and thus improving cutting efficiency. In addition, since the heat is removed during cutting, the lifespan of the cutting wire 300 can be increased, and thus operating costs can be reduced.

[0094] like Figure 1 As shown, the cutting line 300 vertically cuts the structure 200 while rotating counterclockwise. Therefore, when compressed air is injected onto the cutting line 300, foreign objects attached to it fall downwards due to gravity, and simultaneously move along the rotational direction of the cutting line 300 due to the air pressure caused by the injection of compressed air and the rotational force caused by the rotation of the cutting line 300. As described above, since compressed air is injected while the cutting line 300 is rotating and performing cutting, both foreign objects attached to the cutting line 300 and foreign objects generated during cutting and attached to the structure fall downwards while moving along the rotational direction of the cutting line 300.

[0095] To effectively collect such foreign matter, the discharge section 130 needs to be positioned near the end of the structure 200 surrounding the structure 200 in the rotational direction of the cutting line 300. Since the cover 110, configured to airtightly seal the second roller unit 420, is connected to the ground and thus performs the function of preventing foreign matter from dispersing to the outside, the cover acts as a dust collector. Foreign matter can be introduced into the cover 110, configured to surround the second roller unit 420, by compressed air and the rotation of the cutting line 300, and the foreign matter can be discharged through the discharge section 130. More specifically, as... Figure 7 The discharge section 130 can be located below the cutting line 300 and the second roller unit 420.

[0096] Because even in Figure 8 In the vertical cutting illustrated, compressed air is also injected onto the cutting line 300, causing the foreign object to move downwards under air pressure, further moving counterclockwise, and finally falling to the ground. Since compressed air is injected onto the cutting line 300 in a direction toward the second roller unit 420 before the foreign object falls to the ground, it eventually reaches the vicinity of the second roller unit 420. In the dust collection system according to the invention, dust and foreign objects can be automatically collected to the discharge section 130 and easily discharged. Therefore, the cost of manufacturing the dust collection equipment can be significantly reduced, as can the installation, operation, and dismantling costs of the dust collection equipment.

[0097] Figure 8 This is a view showing in detail the roller unit of the wire saw associated with the dust collection system according to the present invention.

[0098] The first roller unit 410 and the second roller unit 420 are identical to each other in configuration except for the positions. Accordingly, hereinafter, the configuration of the second roller unit 420 will be described. The second roller unit 420 can include a fixed roller 421, a guide roller 422, a first auxiliary roller 423, a second auxiliary roller 424, a support portion 425, a fixing portion 426, a non-rotating frame 427, and a rotating frame 428.

[0099] The fixed roller 421, which is a roller fixed to the support portion 425 and thus supported, helps to stably move the cutting wire 300 so that the cutting wire surrounds the structure 200. The guide roller 422 guides the cutting wire 300 introduced from the main roller of the wire saw toward the fixed roller 421, thus helping the fixed roller 421 to move the cutting wire 300.

[0100] The first auxiliary roller 423, which is a roller configured to assist the fixed roller 421, is configured such that at least a portion of the first auxiliary roller is connected to the outer circumferential surface of the fixed roller 421 to prevent the cutting wire 300 moving along the outer circumferential surface of the fixed roller 421 from being separated from the fixed roller. In the same manner, the second auxiliary roller 424 is also configured such that at least a portion of the second auxiliary roller is connected to the outer circumferential surface of the guide roller 422 to prevent the cutting wire 300 moving along the outer circumferential surface of the guide roller 422 from being separated from the guide roller.

[0101] The support portion 425 is a member configured to support the fixed roller 421 and the first auxiliary roller 423. The fixing portion 426 coupled to the support portion 425 is a member configured to be fixed to a wall or the like of the structure 200. As shown in FIG. 4B, the fixing portion 426 can be coupled to the wall of the structure 200 by means of anchor bolts. ​ As shown in FIG. 4B, the anchor bolts can be coupled to a plurality of holes provided in the fixing portion 426, whereby the fixing portion can be coupled to the wall of the structure 200.

[0102] The non-rotating frame 427 is a cylindrical frame having a hole formed therethrough and is non-rotatable, through which the cutting wire 300 passes. The rotating frame 428 is a cylindrical rotatable frame inserted into the non-rotating frame 427. The rotating frame 428 can be used to change the angle between the guide roller 422 and the fixed roller 421 as needed.

[0103] As described above, each of the first auxiliary roller 423 and the second auxiliary roller 424 prevents the cutting wire 300 from being separated from the outer circumferential surface of the corresponding one of the fixed roller 421 and the guide roller 422 during cutting. Since a force is applied to the cutting wire 300 during cutting, the cutting wire 300 is excessively frequently separated from the outer circumferential surface of the first auxiliary roller 423 and the second auxiliary roller 424. In general, if there are no first auxiliary roller 423 and second auxiliary roller 424, the cutting wire 300 can be easily separated during cutting using the wire saw machine.

[0104] The cutting line 300 must be set again on the outer circumferential surface of each of the fixed roller 421 and the guide roller 422; however, this significantly reduces the cutting efficiency. Since the cutting work must be stopped when the cutting line 300 is separated while performing the cutting work, the cover must be removed, and the setting must be performed again, thus resulting in an increase in time and cost and a reduction in productivity. In particular, when the cutting line 300 is separated from the outer circumferential surfaces of the rollers 421 and 422 at a height higher than that of the high structure of the ground, more time and effort are required to restore the cutting line.

[0105] However, in the roller system proposed by the present application, the second roller unit 420 is provided with the first auxiliary roller 423 and the second auxiliary roller 424, whereby it is possible to prevent the separation of the cutting line 300, and thus it is possible to significantly improve the cutting efficiency.

[0106] The above-described embodiments are predetermined combinations of elements and features of the present application. Each element or feature must be considered optional unless explicitly stated otherwise. Each element or feature can be implemented in a state not combined with another element or feature. Furthermore, some elements and / or features can be combined to constitute an embodiment of the present application. The order of operations described in the embodiments of the present application can be changed. Some elements or features in a certain embodiment can be included in another embodiment, or can be replaced with corresponding elements or features in another embodiment. It is obvious that claims having no explicit reference relationship can be combined to constitute an embodiment, or can be included in the application after the application by modification as new claims.

[0107] Those skilled in the art will appreciate that the application can be practiced in other specific forms without departing from the essential characteristics of the application. The foregoing description is, therefore, to be considered in all respects as illustrative and not restrictive. The scope of the application should be determined not with reference to the above description but with reference to the appended claims, and all changes that come within the meaning and range of equivalents are intended to be embraced therein.

[0108] Explanation of Reference Numerals

[0109] Cover (110)

[0110] Cutting recess member (115)

[0111] Transparent plate (117)

[0112] Passage member (120)

[0113] Discharge portion (130)

[0114] Air compressor (140)

[0115] Air hose (145)

[0116] Rubber filling member (150)

[0117] Pipe bolt member (151)

[0118] Nut member (153)

[0119] Cover member (154)

[0120] Rubber filler (155)

[0121] Rubber hole (156)

[0122] Filling member for dust collection and hood recess protection (158)

[0123] Valve (160)

[0124] Structure (200)

[0125] Cutting line (300)

[0126] Main roller (405)

[0127] First roller unit (410)

[0128] Second roller unit (420)

[0129] Fixed roller (421)

[0130] Guide roller (422)

[0131] First auxiliary roller (423)

[0132] Second auxiliary roller (424)

[0133] Support portion (425)

[0134] Fixed portion (426)

[0135] Non-rotating frame (427)

[0136] Rotating frame (428)

Claims

1. A dust collection system for collecting foreign matters generated during cutting of a nuclear power plant structure and foreign matters attached to a cutting line in a dry state, the dust collection system comprising: a cover configured to hermetically seal the nuclear power plant structure as a target to be cut, the cover being provided with a plurality of cutting recess members having heights adjusted with respect to the cutting line at an outer peripheral surface of the cover, the cover being made of a transparent material; an air compressor configured to supply compressed air; an air hose configured to deliver the compressed air; a passage member provided in each of the plurality of cutting recess members, the passage member being configured to receive the compressed air so that the compressed air is sprayed to the cutting line through the cover made of the transparent material; the dust collection system characterized by comprising: a filling member configured to wrap at least a portion of an inner peripheral surface of each of the plurality of cutting recess members while wrapping at least a portion of an outer peripheral surface of the passage member, so that a frictional force is formed between the passage member and the filling member; and a discharge portion provided near an end portion of the nuclear power plant structure around the nuclear power plant structure in a rotational direction of the cutting line, the discharge portion being configured to discharge the foreign matters. The passage member is configured such that a length of the passage member is adjustable so as to extend through the cover.

2. The dust collection system of claim 1, wherein, The passage member includes a pipe.

3. The dust collection system of claim 2, wherein, The cover made of the transparent material includes a transparent acrylic cover.

4. The dust collection system of claim 1, wherein, 5.The dust collection system according to claim 1, wherein the plurality of cutting recess members are provided at a predetermined interval in a direction parallel to the ground along the outer peripheral surface of the cover, and a vertical height of each of the plurality of cutting recess members is equal to a vertical height of the cutting line or is different from the vertical height of the cutting line within a predetermined range. The filling member includes a filling member made of rubber.

6. The dust collection system of claim 1, wherein, ​

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