Pipe cutting apparatus
Patent Information
- Application Number
- PCT/KR2025/019260
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2025-03-26
- Filing Date
- 2025-11-20
- Publication Date
- 2026-10-01
Smart Images
Figure KR2025019260_01102026_PF_FP_ABST
Abstract
Description
Pipe cutting device
[0001] The present invention relates to a pipe cutting device for cutting pipes.
[0002] Generally, a refrigeration cycle used in refrigerators, etc., includes a compressor that compresses a low-temperature, low-pressure gaseous refrigerant into a high-temperature, high-pressure gaseous refrigerant; a condenser that changes the phase of the high-temperature, high-pressure gaseous refrigerant compressed by the compressor into a high-temperature, high-pressure liquid refrigerant; an expansion valve that expands the high-temperature, high-pressure liquid refrigerant that has passed through the condenser into a low-temperature, low-pressure two-phase refrigerant; and an evaporator that changes the phase of the low-temperature, low-pressure two-phase refrigerant that has passed through the expansion valve into a low-temperature, low-pressure gaseous refrigerant. Each of these components is configured to form a closed circuit through refrigerant piping.
[0003] The refrigerant circulating along the refrigerant pipe releases heat to the surroundings as it condenses in the condenser and absorbs heat from the surroundings as it evaporates in the evaporator, and cooling action is achieved by this evaporator.
[0004] Meanwhile, to reduce costs, the compressor is initially connected to the refrigerant piping via welding, and when the compressor needs to be replaced due to failure or refrigerant leakage, the compressor and refrigerant piping are reconnected.
[0005] Recently, connector components that easily connect pipes are being used, and to connect pipes with a connector, a straight pipe section of minimum length is required.
[0006] However, there is a weld bead on the suction side piping of the compressor, and there is a challenge to cut the suction side piping as close as possible to avoid this and secure sufficient piping length.
[0007] In order to solve these problems, conventionally, the ends of pipes were cut using hacksaws or tin snips, but in this case, there are problems such as the surface being rough and metal shavings penetrating into the pipe when cutting, and the work time being long due to secondary processing after cutting.
[0008] In addition, although pipe cutting devices have been developed in the past, conventional pipe cutting devices have a problem in that the blade is located at the center of the body, making it difficult to cut the pipe close to the suction side of the compressor.
[0009] (Patent Document 1) Korean Registered Patent No. 10-2069768 (January 17, 2020)
[0010] The present invention is proposed to improve upon the above-mentioned problems, and the objective of the present invention is to provide a pipe cutting device capable of cutting the piping of a compressor close to the suction side.
[0011] Another objective of the present invention is to provide a pipe cutting device that prevents iron filings from penetrating into the pipe during pipe cutting and allows the cutting surface to be smooth.
[0012] Another objective of the present invention is to provide a pipe cutting device that can stably support a pipe to be processed.
[0013] Another objective of the present invention is to provide a pipe cutting device capable of stable transport without tilting to one side during the movement of a transport unit equipped with a blade.
[0014] Another objective of the present invention is to provide a pipe cutting device in which a pipe can be cut by being strongly pressurized by the rotational force of a blade portion.
[0015] A pipe cutting device according to an embodiment of the present invention may include a frame having a screw shaft inside, a transfer unit coupled to the screw shaft and movable in the axial direction along the screw shaft, a support unit provided on the frame and spaced axially from the transfer unit to support the pipe, and an operating unit coupled to the end of the screw shaft and moving the transfer unit in the axial direction by rotational operation.
[0016] The above transfer unit may include a main body portion that is fastened by penetrating the screw shaft and a blade portion provided at a lateral end of the main body portion.
[0017] The support member may include a protrusion spaced axially apart from the main body member and a roller provided at the lateral end of the protrusion, provided on the frame.
[0018] According to this configuration, the blade portion is positioned at an angle to the side of the pipe cutting device, thereby having the advantage of being able to cut the suction-side pipe of the compressor as close as possible.
[0019] In addition, since the pipe can be cut smoothly due to its simple structure, the penetration of metal shavings into the pipe is prevented, and the cut surface has the advantage of being smooth. Furthermore, since secondary processing is not required after cutting the pipe, there is an advantage of reducing working time.
[0020] The blade portion and the roller may be spaced apart in the axial direction.
[0021] The outer end of the blade portion and the outer end of the roller may be arranged on the same plane.
[0022] The outer end of the blade portion, the outer end of the roller, and the outer end of the frame may be arranged on the same plane.
[0023] The upper part of the transfer section and the upper part of the support section may be arranged on the same plane.
[0024] The above operating part can be connected to the screw shaft outside the frame.
[0025] The above support member may be positioned between the above operating member and the above transfer member.
[0026] The above frame may include a pair of first parts spaced apart in both directions and a pair of second parts connected to the pair of first parts and spaced apart in the axial direction.
[0027] The above screw shaft can be inserted through the above pair of second parts.
[0028] The pipe cutting device may further include a guide pin that extends axially within the frame and penetrates the main body.
[0029] The above guide pin can be inserted through the above pair of second parts.
[0030] The above screw shaft and the above guide pin may be spaced apart in both directions.
[0031] The above main body may include a shaft coupling part coupled to the screw shaft and an extension part that is bent backward from the shaft coupling part and extends upward.
[0032] The above shaft coupling part can be accommodated in the internal space of the frame.
[0033] The blade portion may be provided at the lateral end of the extension portion.
[0034] The above support member may include a first support member spaced forward in the axial direction from the main body and a second support member spaced backward in the axial direction from the main body.
[0035] The second support member may include a protrusion protruding upward from the upper surface of the frame and a plurality of rollers provided on both sides of the protrusion.
[0036] The plurality of rollers may include a pair of first rollers provided on both sides of the protrusion and a pair of second rollers disposed below the pair of first rollers.
[0037] The above transfer unit may include the blade unit provided on one side of the main body unit and the roller unit provided on the other side of the main body unit.
[0038] The above pipe cutting device may further include a guide pin that penetrates the main body and extends in the axial direction.
[0039] The above guide pin can be inserted by penetrating the first support member and the second support member.
[0040] According to the proposed invention, the following effects are achieved.
[0041] First, since the blade section is positioned at an angle to the side of the pipe cutting device, the compressor piping can be cut close to the suction side. Therefore, when replacing the compressor due to failure or refrigerant leakage, there is an advantage in that the compressor and refrigerant piping can be easily connected.
[0042] Second, when cutting a pipe using a pipe cutting device, the phenomenon of metal shavings penetrating into the pipe is prevented, and the cut surface can be made smooth. Therefore, since secondary processing is not required after cutting the pipe, there is an advantage of shortening the working time.
[0043] Third, since multiple rollers are provided to support the piping, there is an advantage that both sides of the piping are stably supported by multiple rollers.
[0044] Fourth, since a guide pin is provided to guide the axial movement of the feed unit equipped with a blade, there is an advantage that the feed unit does not tilt to one side during the movement process and stable movement is possible.
[0045] Fifth, since a relatively heavy operating part is provided at the front of the frame, when the pipe cutting device is rotated, the center of gravity of the pipe cutting device is concentrated toward the operating part, thereby allowing the pipe to be stably supported without shaking from side to side.
[0046] In addition, as the pipe cutting device rotates, the pipe can be strongly pressurized and cut by the rotational force of the blade, which has the advantage of reducing working time.
[0047] FIG. 1 is a left-side perspective view of a pipe cutting device according to a first embodiment of the present invention.
[0048] Figure 2 is a left side view of the pipe cutting device.
[0049] FIG. 3 is a perspective view of the right side of the pipe cutting device.
[0050] Figure 4 is a right side view of the pipe cutting device.
[0051] Figure 5 is a plan view of the pipe cutting device.
[0052] Figure 6 is a bottom view of the pipe cutting device.
[0053] Figure 7 is a rear view of the pipe cutting device.
[0054] Figure 8 is a drawing showing the conveying part of the pipe cutting device moved to the rear.
[0055] FIG. 9 is a perspective view showing the pipe connected to the pipe cutting device.
[0056] Figure 10 is a plan view showing the pipe connected to the pipe cutting device.
[0057] FIG. 11 is a left-side perspective view of a pipe cutting device according to a second embodiment of the present invention.
[0058] FIG. 12 is a left side view of the pipe cutting device.
[0059] FIG. 13 is a perspective view of the right side of the pipe cutting device.
[0060] FIG. 14 is a right side view of the pipe cutting device.
[0061] Figure 15 is a plan view of the pipe cutting device.
[0062] FIG. 16 is a bottom view of the pipe cutting device.
[0063] FIG. 17 is a rear view of the pipe cutting device.
[0064] FIG. 18 is a perspective view showing the pipe connected to the pipe cutting device.
[0065] FIG. 19 is a plan view showing the pipe connected to the pipe cutting device.
[0066] FIG. 20 is a drawing showing the suction side piping of a compressor being cut using the pipe cutting device.
[0067] Hereinafter, some embodiments of the present invention will be described in detail with reference to the exemplary drawings. It should be noted that in assigning reference numerals to the components of the drawings, the same components are given the same reference numeral whenever possible, even if they are shown in different drawings. Furthermore, in describing the embodiments of the present invention, if it is determined that a detailed description of related known components or functions would hinder understanding of the embodiments of the present invention, such detailed description is omitted.
[0068] FIG. 1 is a left-side perspective view of a pipe cutting device according to a first embodiment of the present invention, FIG. 2 is a left-side perspective view of the pipe cutting device, FIG. 3 is a right-side perspective view of the pipe cutting device. FIG. 4 is a right-side perspective view of the pipe cutting device.
[0069] FIG. 5 is a plan view of the pipe cutting device, FIG. 6 is a bottom view of the pipe cutting device, and FIG. 7 is a rear view of the pipe cutting device.
[0070] Referring to FIGS. 1 to 7, a pipe cutting device (10) according to the first embodiment of the present invention can be used as a device for cutting a pipe through which fluid flows.
[0071] For example, the pipe cutting device (10) can be used to cut the suction side refrigerant pipe of the compressor as close as possible when the compressor needs to be replaced due to a compressor failure or refrigerant leakage.
[0072] The pipe cutting device (10) may have a three-dimensional shape in which the height in the vertical direction is smaller than the length in the front-back direction. The pipe cutting device (10) may be formed such that the width in the left-right direction is smaller than the height in the vertical direction.
[0073] Defines the direction.
[0074] Based on FIG. 1, the surface where the control unit (60) is placed is defined as the "front side," and the surface where the blade unit (55) is placed is defined as the "left side."
[0075] The side opposite to the front where the above-mentioned control unit (60) is placed is defined as the "rear side," and the side opposite to the left side where the above-mentioned blade unit (55) is placed is defined as the "right side."
[0076] The direction from the rear of the pipe cutting device (10) toward the front is defined as "forward." Conversely, the direction from the front of the pipe cutting device (10) toward the rear is defined as "backward."
[0077] The above front and rear can be defined as the "front-rear direction" or "first direction."
[0078] Based on FIG. 1, the pipe cutting device (10) may have a height in the vertical direction. The vertical direction may be understood as a direction perpendicular to the ground. The vertical direction may be defined as a "second direction."
[0079] Based on FIG. 1, the pipe cutting device (10) may have a width in the left-right direction. The left-right direction or both directions may be defined as "third direction."
[0080] The above pipe cutting device (10) may include a frame (30) having a screw shaft (20) inside, a support member (40) formed on the frame (30) to support a pipe (80 in FIG. 8), and a transfer member (50) coupled to the screw shaft (20) and movable in the axial direction.
[0081] The pipe cutting device (10) may further include an operating part (60) coupled to the screw shaft (20) outside the frame (30) and a guide pin (70) that guides the movement of the transfer part (50).
[0082] The above frame (30) can be formed in a frame shape with an open center.
[0083] For example, the frame (30) may be formed in a rectangular frame shape having an opening (30a) that penetrates from the center of the upper surface to the lower surface. The screw shaft (20) and the guide pin (70) may be accommodated in the opening (30a).
[0084] The opening (30a) may accommodate a portion of the transfer member (50) coupled to the screw shaft (20) and the guide pin (70). The opening (30a) may form a space for the transfer member (50) to move in the axial direction.
[0085] The above frame (30) may include a pair of first parts (31) spaced apart in the left-right direction and a pair of second parts (32) that connect the pair of first parts (31) and spaced apart in the front-back direction.
[0086] Each of the above pair of first parts (31) is formed long in the front-rear direction and can be arranged facing each other. Each of the above pair of second parts (32) is formed long in the left-right direction and can be arranged facing each other.
[0087] The front-rear length of each of the pair of first parts (31) may be formed to be longer than the left-right length of each of the pair of second parts (32). Accordingly, the opening (30a) may be formed such that the front-rear length is longer than the left-right width.
[0088] As the length of the opening (30a) in the front-rear direction increases, the distance the conveying unit (50) moves in the axial direction can increase. Accordingly, as the length of the opening (30a) in the front-rear direction increases, the diameter of the pipe that can be cut by the pipe cutting device (10) can increase.
[0089] The screw shaft (20) may be arranged in a long, forward-rear direction inside the frame (30). The screw shaft (20) may include a long axis extending in the forward-rear direction and a screw thread formed on the outer surface of the long axis.
[0090] The screw shaft (20) may be positioned so as to be biased to one side within the frame (30). For example, the screw shaft (20) may be positioned so as to be biased to the right within the frame (30).
[0091] The screw shaft (20) may be rotatably positioned within the opening (30a). The screw shaft (20) may be coupled to both ends of the frame (30) and rotated by the rotation of the operating part (60).
[0092] Specifically, the front end of the screw shaft (20) is connected to a shaft connecting part (61) provided in the operating part (60). For example, the shaft connecting part (61) may penetrate a second part (32) positioned in front of the frame (30). The front end of the screw shaft (20) may be connected to the operating part (60) through the shaft connecting part (61).
[0093] The rear end of the screw shaft (20) is coupled to the frame (30). For example, the rear end of the screw shaft (20) may be coupled by penetrating a second part (32) positioned at the rear of the frame (30). The rear end of the screw shaft (20) may be coupled to a shaft fastening hole (33) formed in the second part (32) of the frame (30). A female screw that is screw-coupled with the threads of the screw shaft (20) may be formed on the inner surface of the shaft fastening hole (33).
[0094] With the configuration of the screw shaft (20) as described above, the screw shaft (20) can be rotated together in a clockwise or counterclockwise direction as the operating part (60) is rotated.
[0095] The support member (40) protrudes upward from the upper surface of the frame (30) and can support the pipe (80).
[0096] The support member (40) may include a protrusion (41) that protrudes upward from the upper surface of the frame (30), and a plurality of rollers (42, 43) provided on each side of the protrusion (41).
[0097] The protrusion (41) may protrude upward from the upper front portion of the frame (30). The protrusion (41) may have a height in the vertical direction, a width in the horizontal direction, and a thickness in the front-rear direction. For example, the protrusion (41) may be formed in the shape of an upright plate. The protrusion (41) may support the plurality of rollers (42, 43).
[0098] The plurality of rollers (42, 43) are configured to support the pipe (80) located on the support member (40) and to facilitate the cutting of the pipe (80) by the blade member (55).
[0099] The plurality of rollers (42, 43) may include a pair of first rollers (42) provided on the upper sides of the protrusion (41) and a pair of second rollers (43) provided on the lower sides of the protrusion (41). The plurality of rollers (42, 43) may each have a rotation axis for rotating the roller.
[0100] The above pair of first rollers (42) are symmetrical to each other in the left-right direction, and the above pair of second rollers (43) can be symmetrical to each other in the left-right direction.
[0101] The pair of first rollers (42) and the pair of second rollers (43) may be spaced apart in the vertical direction. At this time, the pair of first rollers (42) and the pair of second rollers (43) may be arranged to overlap in the vertical direction. That is, the pair of second rollers (43) may be placed directly below the pair of first rollers (42).
[0102] With the configuration of the rollers (42, 43) as described above, both sides of the pipe (80) can be stably supported by a pair of first rollers (42) and a pair of second rollers (43) provided on both sides of the pipe (80).
[0103] The support member (40) can function as a stopper to prevent the transfer member (50) from moving further forward when the transfer member (50) moves in the axial direction. That is, the support member (40) can be understood as the part where the transfer member (50) moves forward as much as possible. The support member (40) can prevent the transfer member (50) from moving forward and separating from the screw shaft (20).
[0104] Additionally, the second part (32) of the frame (30) can function as a stopper to prevent the transfer unit (50) from moving further backward when the transfer unit (50) moves in the axial direction. That is, the second part (32) can be understood as the part where the transfer unit (50) moves as far backward as possible. The second part (32) can prevent the transfer unit (50) from moving backward and separating from the screw shaft (20).
[0105] The above transfer unit (50) is configured to move in the axial direction by rotational operation of the above operating unit (60) to cut the pipe (80) supported by the above support unit (40). The above transfer unit (50) may be spaced apart from the rear of the above support unit (40).
[0106] The above transfer unit (50) may include a shaft coupling unit (51) that is coupled through the screw shaft (20), an extension unit (52) that extends upward from the shaft coupling unit (51), and a blade unit (55) provided on the extension unit (52).
[0107] The above shaft coupling part (51) and the above extension part (52) can be named "main body part".
[0108] The shaft coupling portion (51) can be received in the opening (30a) of the frame (30) while being fastened through the screw shaft (20). A female screw that is screw-coupled with the threads of the screw shaft (20) may be formed in the shaft coupling portion (51). Accordingly, while the shaft coupling portion (51) is fastened to the screw shaft (20), it can move in the axial direction according to the rotation of the screw shaft (20).
[0109] For example, when the above-mentioned operating part (60) is rotated clockwise, the above-mentioned screw shaft (20) rotates clockwise together, and the above-mentioned shaft coupling part (51) can move forward.
[0110] As another example, if the above-mentioned operating part (60) is rotated counterclockwise, the above-mentioned screw shaft (20) rotates counterclockwise together, and the above-mentioned shaft coupling part (51) can move backward.
[0111] The extension part (52) is connected to the shaft coupling part (51) and functions to support the blade part (55). The extension part (52) may have a shape that is bent backward from the upper part of the shaft coupling part (51). That is, the extension part (52) may be bent backward from the upper part of the shaft coupling part (51) and then extended upward.
[0112] The reason the extension part (52) has a shape bent backward is to minimize the axial size of the pipe cutting device (10) by considering the outer diameter of the blade part (55). That is, by positioning the blade part (55) on the extension part (52) which is located backward relative to the shaft coupling part (51), the distance that the conveying part (50) must travel to cut the pipe (80) can be shortened.
[0113] The blade portion (55) may be positioned so as to be biased toward one side of the extension portion (52). For example, the blade portion (55) may be positioned on the left side of the extension portion (52).
[0114] The blade portion (55) can be rotatably supported by being penetrated by a fastening portion (56) that provides a rotation axis. The blade portion (55) can be rotated while supported on the left side of the extension portion (52) to cut the pipe (80).
[0115] The upper part of the support part (40) and the upper part of the transfer part (50) may have the same height.
[0116] Additionally, the left end of the support member (40) and the left end of the transfer member (50) may be arranged parallel to each other in the front-rear direction. That is, the left end of the roller (42, 43) provided on the left side of the protrusion (41) and the left end of the blade member (55) provided on the left side of the extension member (52) may be arranged parallel to each other in the axial direction.
[0117] Additionally, the left end of the roller (42, 43), the blade part (55), and the left end of the frame (30) can be arranged parallel in the axial direction. That is, the sides of the roller (42, 43), the blade part (55), and the frame (30) can be arranged on the same plane.
[0118] According to the configuration of the present invention, the blade portion (55) is positioned so as to be biased toward the side of the pipe cutting device (10), thereby having the advantage of being able to cut the suction side pipe of the compressor as close as possible.
[0119] The above operating unit (60) is configured to rotate the screw shaft (20) to move the transfer unit (50) in the axial direction. The above operating unit (60) can be rotated by a user. For example, the above operating unit (60) may be formed in a cylindrical shape.
[0120] The above operating part (60) may be connected to the screw shaft (20) from the outside of the frame (30). The above operating part (60) may have a rotation axis extending in the front-rear direction. The above operating part (60) may be connected to the screw shaft (20) by an axis connecting part (61) extending rearward from the back of the above operating part (60).
[0121] When the above-mentioned operating part (60) is rotated clockwise, the screw shaft (20) rotates clockwise together, and the transfer part (50) can move forward according to the clockwise rotation of the screw shaft (20). Accordingly, the distance between the blade part (55) and the rollers (42, 43) can gradually become closer.
[0122] Conversely, when the above-mentioned operating part (60) is rotated counterclockwise, the screw shaft (20) rotates together counterclockwise, and the transfer part (50) can move backward according to the counterclockwise rotation of the screw shaft (20). Accordingly, the distance between the blade part (55) and the rollers (42, 43) can gradually increase.
[0123] In the present invention, in order to cut the pipe (80), the pipe cutting device (10) supporting the pipe (80) can be rotated along the circumferential direction of the pipe (80). In order to prevent the pipe (80) from shaking left and right when the pipe cutting device (10) is rotated, the operating part (60) may be formed of a heavy material at the front of the frame (30). At this time, the diameter of the operating part (60) may be formed to be larger than the width in the left and right directions of the frame (30).
[0124] Accordingly, when the pipe cutting device (10) is rotated while the pipe (80) is supported between the rollers (42, 43) and the blade part (55), the load of the pipe cutting device (10) is concentrated on the side of the operating part (60), which is relatively heavier, so that the pipe (80) can be stably supported without shaking.
[0125] Meanwhile, if the above-mentioned transfer unit (50) moves in the axial direction while penetrating the above-mentioned screw shaft (20), a problem may occur in which the above-mentioned transfer unit (50) tilts to one side during the movement process.
[0126] Accordingly, in the present invention, a guide pin (70) may be provided for stable axial movement of the transfer unit (50).
[0127] The guide pin (70) may be arranged lengthwise in the front-rear direction inside the frame (30). The guide pin (70) may have a rod shape extending in the front-rear direction.
[0128] The guide pin (70) may be positioned so as to be biased to one side within the frame (30). For example, the guide pin (70) may be positioned so as to be biased to the left within the frame (30).
[0129] The guide pin (70) may be positioned laterally spaced apart from the screw shaft (20). The guide pin (70) may be positioned in the left area of the opening (30a), and the screw shaft (20) may be positioned in the right area of the opening (30a). That is, the guide pin (70) and the screw shaft (20) may be positioned side by side in the left-right direction.
[0130] The guide pin (70) can penetrate the transfer unit (50). Specifically, the guide pin (70) can penetrate the shaft coupling unit (51) of the transfer unit (50) in the forward and backward directions.
[0131] The front end of the guide pin (70) can be fastened by penetrating the second part (32) positioned at the front of the frame (30).
[0132] The rear end of the guide pin (70) can be fastened by penetrating the second part (32) positioned at the rear of the frame (30). The rear end of the guide pin (70) can be fastened to a pin fastening hole (34) formed in the second part (32) of the frame (30).
[0133] Hereinafter, a method for cutting a pipe (80) using a pipe cutting device (10) according to the first embodiment of the present invention will be described in detail with reference to the drawings.
[0134] FIG. 8 is a left side view showing the conveying part of the pipe cutting device moved to the rear, FIG. 9 is a perspective view showing the pipe connected to the pipe cutting device, and FIG. 10 is a plan view showing the pipe connected to the pipe cutting device.
[0135] Referring to FIGS. 8 to 10, the conveying unit (50) is moved backward using the operating unit (60) of the pipe cutting device (10).
[0136] The reason for moving the above transfer unit (50) to the rear is to secure a space for inserting the pipe (80) between the rollers (42, 43) and the blade unit (55). That is, the transfer unit (50) is moved to the rear by an appropriate distance depending on the diameter of the pipe (80).
[0137] When the above clearance is secured, the pipe (80) is supported in close contact between the plurality of rollers (42, 43), and the conveying unit (50) is moved forward using the operating unit (60).
[0138] When the above transfer unit (50) moves forward, the blade unit (55) can be supported by being in close contact with the outer surface of the pipe (80).
[0139] When the pipe (80) is firmly fitted between the blade portion (55) and the rollers (42, 43), the pipe cutting device (10) is rotated circumferentially along the outer surface of the pipe (80). At this time, as the pipe cutting device (10) rotates, it is strongly rotated by the weight of the operating portion (60), and as a result, the outer surface of the pipe (80) can be cut by contact friction caused by the rotation of the blade portion (55). Then, the pipe (80) can be cut by repeating the cutting process as described above.
[0140] When cutting pipes using this cutting process, the penetration of metal shavings into the pipe is prevented, and the cut surface has the advantage of being smooth. In addition, since secondary processing is not required after cutting the pipe, there is an advantage of reducing working time.
[0141] Hereinafter, a pipe cutting device according to the second embodiment of the present invention will be described in detail with reference to the drawings.
[0142] FIG. 11 is a left-side perspective view of a pipe cutting device according to a second embodiment of the present invention, FIG. 12 is a left-side perspective view of the pipe cutting device, FIG. 13 is a right-side perspective view of the pipe cutting device, and FIG. 14 is a right-side perspective view of the pipe cutting device.
[0143] FIG. 15 is a plan view of the pipe cutting device, FIG. 16 is a bottom view of the pipe cutting device, and FIG. 17 is a rear view of the pipe cutting device.
[0144] Referring to FIGS. 11 to 17, a pipe cutting device (10) according to the second embodiment of the present invention can be used as a device for cutting a pipe through which fluid flows.
[0145] For example, the pipe cutting device (100) can be used to cut the suction side refrigerant pipe of the compressor as close as possible when the compressor needs to be replaced due to a compressor failure or refrigerant leakage.
[0146] The pipe cutting device (100) may have a three-dimensional shape in which the height in the vertical direction is smaller than the length in the front-back direction. The pipe cutting device (100) may be formed such that the width in the left-right direction is smaller than the height in the vertical direction.
[0147] The above pipe cutting device (100) may include a frame (300) having a screw shaft (200) inside, a first support member (400) and a second support member (500) formed on the frame (300), and a transfer member (600) coupled to the screw shaft (200) and capable of moving in the axial direction.
[0148] The pipe cutting device (100) may further include an operating part (700) coupled to the screw shaft (200) outside the frame (300) and a guide pin (800) that guides the movement of the transfer part (600).
[0149] The above frame (300) may be formed in a frame shape with a portion of the upper surface open.
[0150] For example, the frame (300) may be formed in a rectangular frame shape having an opening (300a) that penetrates through the upper right side to the lower side. The opening (300a) may be cut into a rectangular shape that extends long in the front-rear direction. The screw shaft (200) may be received in the opening (300a).
[0151] A portion of the transfer member (600) coupled to the screw shaft (200) may be accommodated in the opening (300a). The opening (300a) may form a space for the transfer member (600) to move in the axial direction.
[0152] The above frame (300) may include a frame body (310) in which the opening (300a) is formed. The frame body (310) may have a length in the front-rear direction, a width in the left-right direction, and a thickness in the up-down direction.
[0153] The screw shaft (200) may be arranged in a long, forward-rear direction inside the frame body (310). The screw shaft (200) may include a long axis extending in the forward-rear direction and screw threads formed on the outer surface of the long axis.
[0154] The screw shaft (200) may be rotatably positioned within the opening (300a). The screw shaft (200) is coupled to both ends of the frame body (310) and may be rotated by the rotation of the operating part (700).
[0155] Specifically, the front end of the screw shaft (200) is connected to a shaft connecting part (710) provided in the operating part (700). For example, the shaft connecting part (710) can penetrate the front end of the frame body (310). The front end of the screw shaft (200) can be connected to the operating part (700) through the shaft connecting part (710).
[0156] The rear end of the screw shaft (200) is coupled to the frame body (310). For example, the rear end of the screw shaft (200) may be coupled by penetrating the rear end of the frame body (310). The rear end of the screw shaft (200) may be coupled to a shaft fastening hole (330) formed in the rear end of the frame body (310). A female screw that is screw-coupled with the threads of the screw shaft (200) may be formed on the inner surface of the shaft fastening hole (330).
[0157] With the configuration of the screw shaft (200) as described above, the screw shaft (200) can be rotated together in a clockwise or counterclockwise direction as the operating part (700) is rotated.
[0158] The first support member (400) can protrude upward from the upper surface of the front end of the frame body (310).
[0159] The first support member (400) can function as a stopper to prevent the transfer member (600) from moving further forward when the transfer member (600) moves in the axial direction. That is, the first support member (400) can be understood as the part where the transfer member (600) moves forward as much as possible. The first support member (400) can prevent the transfer member (600) from moving forward and separating from the screw shaft (200).
[0160] The second support member (500) protrudes upward from the upper surface of the rear end of the frame body (310) and can support the pipe (900 in FIG. 18).
[0161] The second support member (500) may include a protrusion (510) protruding upward from the upper surface of the frame body (310), and a plurality of rollers (520, 530) respectively provided on both sides of the protrusion (510).
[0162] The protrusion (510) may protrude upward from the rear end of the upper surface of the frame body (310). The protrusion (510) may have a height in the vertical direction, a width in the horizontal direction, and a thickness in the front-back direction. For example, the protrusion (510) may be formed in the shape of an upright plate. The protrusion (510) may support the plurality of rollers (520, 530).
[0163] The above plurality of rollers (520, 530) are configured to support the pipe (900) located on the second support member (510), and to facilitate the cutting of the pipe (900) by the blade member (650).
[0164] The plurality of rollers (520, 530) may include a pair of first rollers (520) provided on the upper sides of the protrusion (510) and a pair of second rollers (530) provided on the lower sides of the protrusion (510). The plurality of rollers (520, 530) may each have a rotation axis for rotating the roller.
[0165] The above pair of first rollers (520) are symmetrical to each other in the left-right direction, and the above pair of second rollers (530) can be symmetrical to each other in the left-right direction.
[0166] The pair of first rollers (520) and the pair of second rollers (530) may be spaced apart in the vertical direction. At this time, the pair of first rollers (520) and the pair of second rollers (530) may be arranged to overlap in the vertical direction. That is, the pair of second rollers (530) may be placed directly below the pair of first rollers (520).
[0167] With the configuration of the rollers (520, 530) as described above, both sides of the pipe (900) can be stably supported by a pair of first rollers (520) and a pair of second rollers (530) provided on both sides of the pipe (900).
[0168] The second support member (500) can function as a stopper to prevent the transfer member (600) from moving further backward when the transfer member (600) moves in the axial direction. That is, the second support member (500) can be understood as the part where the transfer member (600) moves as far backward as possible. The second support member (500) can prevent the transfer member (600) from moving backward and separating from the screw shaft (200).
[0169] The above transfer unit (600) is configured to move in the axial direction by rotational operation of the above operation unit (700) to cut the pipe (900) supported by the above second support unit (500).
[0170] The above transfer unit (600) may be spaced apart and positioned in front of the second support unit (500). The above transfer unit (600) may move axially between the first support unit (400) and the second support unit (500).
[0171] The above transfer unit (600) may include a main body part (610) that is coupled through the screw shaft (200), a blade part (650) provided on one side of the main body part (610), and a roller part (670) provided on the other side of the main body part (610). The blade part (650) and the roller part (670) may be positioned on opposite sides of each other.
[0172] The above main body (610) can move in the forward and backward directions along the screw shaft (200) while coupled to the screw shaft (200).
[0173] For example, the lower part of the main body (610) can be received in the opening (300a) of the frame main body (310) while being fastened through the screw shaft (200). A female screw that is screw-coupled with the threads of the screw shaft (200) may be formed in the lower part of the main body (610). Accordingly, while the main body (610) is fastened to the screw shaft (200), it can move in the axial direction according to the rotation of the screw shaft (200).
[0174] For example, when the above-mentioned operating part (700) is rotated clockwise, the above-mentioned screw shaft (200) rotates clockwise together, and the above-mentioned main body part (610) can move forward.
[0175] As another example, if the above-mentioned operating part (700) is rotated counterclockwise, the above-mentioned screw shaft (200) rotates counterclockwise together, and the above-mentioned main body part (610) can move backward.
[0176] The blade portion (650) may be positioned so as to be biased toward one side of the main body portion (610). For example, the blade portion (650) may be positioned on the left side of the main body portion (610).
[0177] The blade portion (650) can be rotatably supported by being penetrated by a fastening portion (660) that provides a rotation axis. The blade portion (650) can be rotated while supported on the left side of the main body portion (610) to cut the pipe (900).
[0178] The upper part of the first support part (400), the upper part of the second support part (500), and the upper part of the transfer part (600) may have the same height.
[0179] Additionally, the left end of the first support member (400), the left end of the second support member (500), and the left end of the transfer member (600) may be arranged parallel to each other in the front-rear direction. That is, the left end of the first support member (400), the left end of the roller (520, 530) provided on the left side of the protrusion (510), and the left end of the blade member (650) provided on the left side of the main body member (610) may be arranged parallel to each other in the axial direction.
[0180] Additionally, the left end of the roller (520, 530), the blade part (650), and the left end of the frame body (310) may be arranged parallel in the axial direction. That is, the sides of the roller (520, 530), the blade part (650), and the frame body (310) may be arranged on the same plane.
[0181] According to the configuration of the present invention, the blade portion (650) is positioned so as to be biased toward the side of the pipe cutting device (100), thereby having the advantage of being able to cut the suction side pipe of the compressor as close as possible.
[0182] The above-described operating unit (700) is configured to rotate the screw shaft (200) to move the transfer unit (600) in the axial direction. The above-described operating unit (700) can be rotated by a user. For example, the above-described operating unit (700) may be formed in the shape of a rod or a ribbon.
[0183] The above operating part (700) may be connected to the screw shaft (200) from the outside of the frame body (310). The above operating part (700) may have a rotation axis extending in the front-rear direction. The above operating part (700) may be connected to the screw shaft (200) by an axis connecting part (710) extending rearward from the back of the above operating part (700).
[0184] When the above-mentioned operating unit (700) is rotated clockwise, the screw shaft (200) rotates clockwise together, and the transfer unit (600) can move backward according to the clockwise rotation of the screw shaft (200). Accordingly, the distance between the blade unit (650) and the rollers (520, 530) can gradually increase.
[0185] Conversely, when the above-mentioned operating part (700) is rotated counterclockwise, the screw shaft (200) rotates together counterclockwise, and the transfer part (600) can move forward according to the counterclockwise rotation of the screw shaft (200). Accordingly, the distance between the blade part (650) and the rollers (520, 530) can gradually become closer.
[0186] In the present invention, in order to cut the pipe (900), the pipe cutting device (100) supporting the pipe (900) can be rotated along the circumferential direction of the pipe (900). In order to prevent the pipe (900) from shaking left and right when the pipe cutting device (100) is rotated, the operating part (700) may be formed of a heavy material at the front of the frame body (310). At this time, the diameter of the operating part (700) may be formed to be larger than the left-right width of the frame body (310).
[0187] Accordingly, when the pipe cutting device (100) is rotated while the pipe (900) is supported between the rollers (520, 530) and the blade part (650), the load of the pipe cutting device (100) is concentrated on the side of the operating part (700), which is relatively heavier, so that the pipe (900) can be stably supported without shaking.
[0188] Meanwhile, if the above-mentioned transfer unit (600) moves in the axial direction while penetrating the above-mentioned screw shaft (200), a problem may occur in which the above-mentioned transfer unit (600) tilts to one side during the movement process.
[0189] Accordingly, in the present invention, a guide pin (800) may be provided for stable axial movement of the transfer unit (600).
[0190] The guide pin (800) may be arranged in a long, forward-backward direction inside the frame (30). The guide pin (800) may have a rod shape extending in the forward-backward direction.
[0191] The guide pin (800) may be positioned spaced upward from the upper surface of the frame body (310). For example, the guide pin (800) may be positioned biased to the left from the upper side of the frame body (310).
[0192] The guide pin (800) may be positioned laterally spaced apart from the screw shaft (200). When viewing the frame body (310) in a planar view, the guide pin (800) may be positioned in the left area of the frame body (310), and the screw shaft (200) may be positioned in the right area of the frame body (310). That is, the guide pin (800) and the screw shaft (200) may be positioned in the left-right direction.
[0193] The guide pin (800) can penetrate the transfer unit (600). Specifically, the guide pin (800) can penetrate the transfer unit (600) in the forward and backward directions.
[0194] The front end of the guide pin (800) can be fastened by penetrating the first support member (400).
[0195] The rear end of the guide pin (800) can be fastened by penetrating the second support member (500). The rear end of the guide pin (800) can be fastened to a pin fastening hole (340) formed in the second support member (500).
[0196] Hereinafter, a method for cutting a pipe (900) using a pipe cutting device (100) according to the second embodiment of the present invention will be described in detail with reference to the drawings.
[0197] FIG. 18 is a perspective view showing a pipe connected to the pipe cutting device, FIG. 19 is a plan view showing a pipe connected to the pipe cutting device, and FIG. 20 is a drawing showing the suction side pipe of a compressor being cut using the pipe cutting device.
[0198] Referring to FIGS. 18 to 20, the conveying unit (600) is moved forward using the operating unit (700) of the pipe cutting device (100).
[0199] The reason for moving the above transfer unit (600) forward is to secure a clearance space for inserting the pipe (900) between the rollers (520, 530) and the blade unit (650). That is, the transfer unit (600) is moved forward by an appropriate distance according to the diameter of the pipe (900).
[0200] When the above clearance is secured, the pipe (900) is supported in close contact between the plurality of rollers (520, 530), and the conveying unit (600) is moved backward using the operating unit (700).
[0201] When the above transfer unit (600) is moved to the rear, the blade unit (650) can be supported by being in close contact with the outer surface of the pipe (900).
[0202] When the pipe (900) is firmly fitted between the blade portion (650) and the rollers (520, 530), the pipe cutting device (100) is rotated circumferentially along the outer surface of the pipe (900). At this time, as the pipe cutting device (100) rotates, it is strongly rotated by the weight of the operating portion (700), and as a result, the outer surface of the pipe (900) can be cut by contact friction caused by the rotation of the blade portion (650). Then, the pipe (900) can be cut by repeating the cutting process as described above.
[0203] When cutting pipes using this cutting process, the penetration of metal shavings into the pipe is prevented, and the cut surface has the advantage of being smooth. In addition, since secondary processing is not required after cutting the pipe, there is an advantage of reducing working time.
[0204] In addition, since the blade portion (650) is positioned at a biased position to the side of the pipe cutting device (100), there is an advantage in that the suction side pipe (900) of the compressor (C) can be cut as close as possible.
Claims
1. A frame equipped with a screw shaft; A transfer member coupled to the screw shaft and capable of moving axially along the screw shaft; A support member provided on the above frame and spaced axially from the above transfer member to support the piping; and It includes an operating part coupled to the above screw shaft and moving the above transfer part in the axial direction by rotational operation, The above transfer unit is, A main body portion that is fastened by penetrating the above screw shaft; and It includes a blade portion provided on the side of the main body portion, and The above support member is, A protrusion provided on the above frame and spaced axially apart from the main body; and A pipe cutting device including a roller provided on the side of the above-mentioned protrusion.
2. In Paragraph 1, The above blade and the above roller are a pipe cutting device spaced apart in the axial direction.
3. In Paragraph 2, The outer end of the blade portion and the outer end of the roller are arranged on the same plane in a pipe cutting device.
4. In Paragraph 3, A pipe cutting device in which the outer end of the blade portion, the outer end of the roller, and the outer end of the frame are arranged on the same plane.
5. In Paragraph 1, The upper part of the transfer section and the upper part of the support section are a pipe cutting device arranged on the same plane.
6. In Paragraph 1, The above operating part is a pipe cutting device connected to the screw shaft from the outside of the frame.
7. In Paragraph 6, The above support member is a pipe cutting device positioned between the above operating member and the above transfer member.
8. In Paragraph 1, The above frame is, A pair of first parts spaced apart in both directions; and It includes a pair of second parts that connect the above-mentioned pair of first parts and are spaced apart in the axial direction, The above screw shaft is a pipe cutting device inserted through the above pair of second parts.
9. In Paragraph 8, A pipe cutting device further comprising a guide pin that extends axially within the frame and penetrates the main body.
10. In Paragraph 9, The above guide pin is a pipe cutting device inserted through the above pair of second parts.
11. In Paragraph 10, The above screw shaft and the above guide pin are a pipe cutting device spaced apart in both directions.
12. In Paragraph 1, The above main body part is, A shaft coupling portion coupled to the above screw shaft; and A pipe cutting device comprising an extension portion that is bent backward from the shaft coupling portion and extends upward.
13. In Paragraph 12, The above-mentioned shaft coupling is a pipe cutting device accommodated in the internal space of the frame.
14. In Paragraph 12, The above blade portion is a pipe cutting device provided at the lateral end of the above extension portion.
15. In Paragraph 1, The above support member is, A first support member spaced forward in the axial direction from the main body; and A pipe cutting device comprising a second support member spaced axially rearward from the main body.
16. In Paragraph 15, The above second support member is, A protrusion protruding upward from the upper surface of the above frame; and A pipe cutting device comprising a plurality of rollers provided on both sides of the above-mentioned protrusion.
17. In Paragraph 16, The above plurality of rollers are, A pair of first rollers provided on both sides of the above-mentioned protrusion; and A pipe cutting device comprising a pair of second rollers positioned below the pair of first rollers.
18. In Paragraph 16, The above transfer unit is, The blade portion provided on one side of the main body portion; and A pipe cutting device comprising a roller portion provided on the other side of the main body portion.
19. In Paragraph 16, A pipe cutting device further comprising a guide pin that penetrates the main body and extends in the axial direction.
20. In Paragraph 19, The above guide pin is a pipe cutting device inserted through the first support member and the second support member.