KR20200112516A - Apparatus for welding pipe - Google Patents

Abstract

The present invention provides a pipe welding apparatus capable of conveniently and efficiently performing welding work. The pipe welding apparatus comprises: a first body which is caught and moved on a chain mounted on the circumference of a pipe, and includes an accommodation space to allow the chain to pass therethrough, at least one sprocket arranged across the accommodation space to be engaged with the chain, and a first driving unit connected to the sprocket; a second body which is arranged to be separated from the first body, and includes a welding torch of which an end faces the outer circumferential surface of the pipe, a second driving unit to move the welding torch straight in one direction, and a third driving unit arranged on one side of the welding torch to change the angle of the welding torch; a first distance adjustment bar extended from the first body towards the second body to support the second body and formed to be stretched; and a pair of second distance adjustment bars separated from the first adjustment bar to protrude from both sides of the first body and the second body, and mutually connected to be slid between the first body and the second body.

Description

Pipe welding device {Apparatus for welding pipe}

The present invention relates to a pipe welding apparatus for welding while traveling around a pipe, and more particularly, to a pipe welding apparatus capable of performing the welding operation more conveniently and efficiently.

Welding is a method capable of bonding metal objects very firmly and is widely used throughout the industry. Welding methods are applied to the manufacture of various products ranging from relatively small items to large metal structures.

For example, in the case of manufacturing a large structure, it is possible to connect a metal plate or a metal frame that has been divided and manufactured by a welding method. Even in forming a pipe by connecting pipes, welding is essential. The welding process can be carried out by a person, but if the work is repetitive or dangerous, it can also be carried out using an automated welding equipment.

However, in the case of conventional welding equipment, there is a problem in that it is difficult to efficiently perform welding in various situations because the structure or operation method is standardized. In particular, when welding equipment is applied to pipe welding, problems related to the installation of equipment and adjustment of the position of the torch, problems related to replacement of consumables or coping with situations, problems related to the application of the device when preheating or postheating of the pipe occurs, etc. There were several problems, but these problems were not solved smoothly, so improvement was needed.

Korean Registered Patent Publication No. 10-1315135, (2013. 10. 07)

The technical problem of the present invention is to solve this problem, and to provide a pipe welding apparatus capable of performing a welding operation more conveniently and efficiently.

The technical problem of the present invention is not limited to the above-mentioned problems, and other technical problems that are not mentioned will be clearly understood by those skilled in the art from the following description.

The pipe welding apparatus according to the present invention includes a receiving space for moving around the pipe along the chain by being hooked on a chain mounted around the pipe and passing the chain, and a receiving space disposed across the receiving space to engage with the chain. A first body including at least one sprocket and a first driving part connected to the sprocket to rotate the sprocket; The welding torch is located spaced apart from the first body in the longitudinal direction of the pipe, the end of which faces the outer circumferential surface of the pipe, a second driving part for linearly moving the welding torch in one direction, and one side of the welding torch A second body disposed and including a third driving unit for changing an angle of the welding torch; A first distance adjustment bar extending from the first body toward the second body to support the second body and to be stretchable; And a pair of second distance adjustment bars that are spaced apart from the first distance adjustment bar and protrude from both sides of the first body and the second body, respectively, and are slidably connected to each other between the first body and the second body. do.

The second body may further include a movable joint part which forms a connection part connecting the second driving part and the welding torch, and is bent about a hinge axis to change the arrangement state of the welding torch.

The third driving unit includes a worm gear, a rotation module having a rotation gear engaged with the worm gear and rotating to adjust the inclination angle of the welding torch, and fixing the welding torch to the rotation module, but rotating by screwing. It may include a distance adjusting screw for adjusting the distance between the rotation center and the welding torch.

The sprocket is a first sprocket connected to the first driving unit and rotated, a second sprocket disposed to be spaced apart from the first sprocket, and a third sprocket moving in parallel to the inside of the accommodation space to change the distance to the second sprocket. A pair of guide screws including a sprocket and vertically connected to the third sprocket at both ends of the third sprocket to rotate forward and backward, and move the third sprocket in parallel may be further included.

The second body is positioned between the guide screws and is a central gear with a part of the shaft exposed to the outside so as to be connected to an external driving device, and is engaged with both sides of the central gear to rotate in a direction opposite to the central gear, respectively. It may further include a movement control unit including a pair of connection gears, and a pair of transmission gears each coupled to an end of the guide screw and engaged with the connection gear to rotate the guide screw in the same direction as the central gear. have.

Advantageous Effects of Invention According to the present invention, welding work for large pipes or the like can be performed more conveniently and efficiently. In particular, the welding device can be installed more quickly and firmly around the pipe, and even when the device is installed around the pipe, it is possible to respond to various changes in the situation. Since the device can be applied, it is possible to perform very smooth welding work regardless of the situation. In addition, through the overall structural improvement of the device, various positions of the welding torch as well as stable maintenance are possible, so that the stability and precision of the welding operation can be greatly improved.

1 is a perspective view of a pipe welding apparatus according to an embodiment of the present invention.
2 is a side view of the pipe welding apparatus of FIG. 1.
3 is a plan view of the pipe welding apparatus of FIG. 1.
4 is an exploded perspective view of the pipe welding apparatus of FIG. 1 in which the first body and the second body are separated.
5 is an operation diagram of a distance adjustment bar of the pipe welding apparatus of FIG. 1.
6 is a partially enlarged view of a second body of the pipe welding apparatus of FIG. 1.
7 is a partial enlarged view of a first body of the pipe welding apparatus of FIG. 1.
8 is an operation diagram of a movement control unit of the pipe welding apparatus of FIG. 1.
9 is an operation diagram of a contact wheel of the pipe welding apparatus of FIG. 1.
10 is a view illustrating a state of use of the pipe welding apparatus of FIG. 1.

Advantages and features of the present invention and methods for achieving them will become apparent with reference to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in a variety of different forms, and only these embodiments are intended to complete the disclosure of the present invention and provide common knowledge in the technical field to which the present invention pertains. It is provided to completely inform the scope of the invention to the possessor, and the invention is only defined by the claims. The same reference numerals refer to the same elements throughout the specification.

Hereinafter, a pipe welding apparatus according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 10.

1 is a perspective view of a pipe welding apparatus according to an embodiment of the present invention, FIG. 2 is a side view of the pipe welding apparatus of FIG. 1, FIG. 3 is a plan view of the pipe welding apparatus of FIG. 1, and FIG. 4 is It is an exploded perspective view of the pipe welding device separated by the first body and the second body.

1 to 4, in the pipe welding apparatus 1 according to the present invention, the body portion where the load is concentrated is separated into a first body 10 and a second body 20, and a first body separated from each other. (10) and the second body 20 is made of a structure that is mutually connected and supported by a first distance adjustment bar 30 and a pair of second distance adjustment bars (41, 42). In this structure, the second body 20 on which the welding torch 210 is formed from the first body 10 fixed to the pipe (see B in FIG. 10) is expanded more freely and at the same time is stably supported in an expanded state, It is a structure capable of very smoothly driving the welding torch 210 even when the second body 10 is extended from the first body 20. That is, the first body 10 has a built-in driving structure such as a first driving unit (refer to 120 in Fig. 7) required to travel around the pipe, so that it is possible to freely travel while being mounted on the pipe, and the second body ( 20) is a second driving unit for driving the welding torch 210 (refer to 220 in Fig. 6) and a third driving unit (refer to 230 in Fig. 6), and other driving units are formed independently of the first body 10 Thus, it is possible to drive the welding torch 210 without problems even in a state relatively far away from the first body 10.

In particular, the first body 10 and the second body 20 formed independently of each other in this way have at least two different structures between them and a first distance adjustment bar 30 and a pair of It is supported very firmly through the 2-distance adjustment bar (41, 42). The first distance adjustment bar 30 extends from the first body 10 toward the second body 20 and is formed as a single support to support the second body 20, and a pair of second distance adjustment bars ( 41 and 42 are formed of a pair of opposing supports each protruding from both sides of the first body 10 and the second body 20 to a shorter length. In particular, the pair of second distance adjustment bars 41 and 42 protrude in the form of cantilevers from opposite sides of the first body 10 and the second body 20, respectively, and contact between them to form a support point. It has a feature of effectively solving problems such as sagging that may occur in the case of and supporting the second body 20 very stably even when the second body 20 is sufficiently extended from the first body 10. Through this structural feature, even if an attachment such as a preheating pad (see C in Fig. 10) is formed around the pipe to which the pipe welding device 1 is applied, the second body 20 is sufficiently extended to avoid this and the equipment is driven without problems. Very convenient and efficient work is possible.

The pipe welding apparatus 1 of the present invention is specifically configured as follows. The pipe welding device 1 moves around the pipe along the chain by being caught in a chain mounted around the pipe (see C in Fig. 10) (see A in Fig. 8 and Fig. 10), and a receiving space (Fig. 7 (see 101), at least one sprocket disposed across the receiving space 101 and engaged with the chain (see the first sprocket 111 of FIGS. 7 and 8) and the sprocket connected to the sprocket A first body 10 including a first driving part (see 120 in FIG. 7) to rotate, and a welding torch 210 that is located spaced apart from the first body 10 in the longitudinal direction of the pipe, and has an end facing the outer circumferential surface of the pipe. ), and a second driving unit 220 for linearly moving the welding torch 210 in one direction, and a third driving unit 230 disposed on one side of the welding torch 210 to change the angle of the welding torch 210 A second body 20 including, a first distance adjustment bar 30 extending from the first body 10 toward the second body 20 to support the second body 20 and to be stretchable, And spaced apart from the first distance adjustment bar 30, protruding from both sides of the first body 10 and the second body 20, respectively, and slidable between the first body 10 and the second body 20 It includes a pair of second distance adjustment bars (41, 42) to be connected (see Figs. 1 to 4). Hereinafter, each configuration and effect of the pipe welding apparatus 1 of the present invention will be described in more detail through an embodiment of the present invention.

As shown in FIGS. 1 to 4, the first body 10 may be formed in a shape such as a kind of enclosure. The first body 10 may be coupled to the outside of the skeleton structure made of a frame, such as a blocking cover 102, and the blocking cover 102 can be opened to access the internal accommodation space (see 101 in FIG. 7). The blocking cover 102 may be formed such that one side is coupled with a hinge or the like to be opened and closed, and in a closed state, it may be fixed with a fixing clip 102a or the like. In a state in which the blocking cover 102 is opened and the inner receiving space 101 is exposed, the chain or the like is passed through the receiving space 101 and coupled to the first body 10. The first body 10 includes the aforementioned first driving unit (see 120 in FIG. 7), a first sprocket (see 111 in FIGS. 7 and 8), a second sprocket (see 112 in FIG. 8), and a third sprocket (see FIG. 8, 113), a fourth driving part (see 140 of FIG. 4), a movement adjusting part (see 130 of FIGS. 7 and 8), and the like may be formed, and through these, it is possible to travel around the pipe by being caught in a chain. The specific structure and operation of the first body 10 will be described later in more detail.

The second body 20 may be formed in a form in which different driving parts are integrated around the welding torch 210 as shown in FIGS. 1 to 4. The second body 20 forms a second driving part 220 for linearly moving the welding torch 210 in a direction from the outside of the pipe toward the pipe, and a connection part connecting the second driving part 220 and the welding torch 210 It is refracted around the hinge axis (refer to 241 in FIG. 2) to change the arrangement state of the welding torch 210, and is disposed on one side of the welding torch 210 and the pipe welding device 1 The third driving unit 230 for changing the angle of the welding torch 210 in response to the circumferential movement along the pipe circumference may be formed in an interconnected form. Through these, the second body 20 has a drive structure independent from the first body 10, and through this, the position of the welding torch 210 can be adjusted very precisely and delicately. The specific structure and operation of the second body 20 will also be described later and will be described in more detail.

The first distance adjustment bar 30 is connected between the first body 10 and the second body 20. The first distance adjustment bar 30 extends from the first body 10 toward the second body 20 to support the second body 20 and is formed to be stretchable (see FIG. 5). One end of the first distance adjustment bar 30 may be combined with the fourth driving part 140 of the first body 10 to expand and contract, as shown in FIG. 4. That is, as described above, a fourth driving part 140 may be formed inside the first body 10, and the fourth driving part 140 is connected to the first distance adjusting bar 30 to be connected to the first distance adjusting bar 30. It can provide a driving force to stretch and contract. The fourth driving unit 140 includes a second screw 142 disposed in the longitudinal direction of the first distance adjustment bar 30, a second moving block 143 that is screwed to the second screw 142 to move linearly, and It may include a fourth motor 141 that rotates the second screw 142. The first distance adjustment bar 30 may be coupled to the second moving block 143 of the fourth driving unit 140 to move in the longitudinal direction of the second screw 142 and expand and contract. At least a part of the first distance adjustment bar 30 is inserted or exposed to the inside of the first body 10 during the expansion and contraction process, and the length may be adjusted. The other end of the first distance adjustment bar 30 is fixed to one side of the second body 20 as shown in FIG. 3, and thus the first distance adjustment bar 30 is stretched and contracted, and the second body 20 and The spacing between the first bodies 10 can be adjusted.

The first distance adjustment bar 30 is composed of a plurality of plate-shaped frames (first frame 31 and second frame 32), at least partially in contact with each other and supported, at least one of the frames It may include a protruding piece 32a which is vertically protruded from the outer surface and supported on the other outer surface. That is, as shown in FIG. 4, by using a structure in which a plate-shaped frame (first frame 31 and second frame 32) is in contact with each other and supported, the weight of the first distance adjustment bar 30 is reduced. At the same time, it can effectively increase the rigidity. This structure is very advantageous in securing load distribution and structural rigidity when the second body 20 and the first body 10 are independently formed and the two are separated relatively far apart as in the present invention. A plurality of protruding pieces (32a) may be disposed at different points, and through this, the structure of the first distance adjustment bar 30 is reinforced, even when the length of the first distance adjustment bar 30 is relatively long. Can be prevented from being deformed. The first distance adjustment bar 30 may include a third frame 33 formed in a long block shape, and the first frame 31, the second frame 32, and the third frame 33 They can be connected to each other to form a single support. The third frame 33 may be disposed at a portion inserted into the first body 10 of the first distance adjustment bar 30, and the first frame 31 and the second frame 32 are the first body ( 10) It can be placed on a part exposed to the outside. The first frame 31 and the second frame 32 that are exposed to the outside may be combined with a cover 34 and the like to capture it.

Meanwhile, the pair of second distance adjustment bars 41 and 42 protrude from both sides of the first body 10 and the second body 20, respectively, as described above. Each has a structure in which one end is fixed to the first body 10 and the second body 20, respectively, and the opposite end is slidably connected to each other between the first body 10 and the second body 20 [ See Fig. 4]. Accordingly, the pair of second distance adjustment bars 41 and 42 may increase or decrease the area of the contacting portion while sliding with each other (see FIG. 5). As shown, the second distance adjustment bars 41 and 42 protrude from the first body 10 and the second body 20 to face each other, and between the second body 20 and the first body 10 At least some of them overlap each other and are supported. That is, the pair of second distance adjustment bars 41 and 42 contact each other between the first body 10 and the second body 20 spaced apart from each other, so that the first body 10 and the second body 20 By forming a variable support point therebetween, structural stability of the entire pipe welding device 1 can be ensured even when the first body 10 and the second body 20 are relatively distant. In the case of supporting an object with only a simple bar-shaped single support, the longer the length, the more liable to sag or deformation of the support due to its own load, but the present invention protrudes from opposite sides and protrudes from the first body 10 and the second body ( 20) By using a pair of second distance adjustment bars (41, 42) that are connected between the two to form a support point, this problem can be solved and the entire device can be maintained very stably.

The second distance adjustment bars 41 and 42 may slide by overlapping at least two different surfaces formed on each of the surfaces, and may include at least a pair of sliding rails 41a and 42a respectively disposed on the surfaces. . As shown in Fig. 4, the sliding rails 41a and 42a parallel to each other are arranged on different surfaces of each second distance adjustment bar 41, 42, and a structure capable of sliding movement such as the holders 41b and 42b is provided. By using the second distance adjustment bar (41, 42) can be connected to each other to enable sliding movement. Through this structure, while securing structural stability by using the second distance adjustment bar (41, 42) as a whole, the first body (10) and the second body (20) are spaced between the first body (10) and the second body (20) due to the stretching action of the first distance adjustment bar (30) The distance can be adjusted more effectively.

5 is an operation diagram of a distance adjustment bar of the pipe welding apparatus of FIG. 1.

As shown in Figure 5, using a distance adjustment bar (the first distance adjustment bar 30 and a pair of second distance adjustment bars (41, 42)), the second body 20 is connected to the first body 10 It can be extended very freely from As described above, the first body 10 is fixed by being hooked on a chain (see A in FIG. 10), but the second body 20 is separated from the first body 20 and the first distance adjustment bar 30 and a pair of second It is possible to maintain the position very stably through the support structure of the distance adjustment bars (41, 42). In particular, through a pair of second distance adjustment bars 41 and 42 that are slidably connected between the first body 10 and the second body 20 to form a support point, as shown in FIG. The structure of the entire device not only when the body 10 and the second body 20 are relatively adjacent, but also when the first body 10 and the second body 20 are relatively distant, as shown in FIG. 5B. Can be kept stable. Through this structure, for example, the first distance adjustment bar 30 and the second distance adjustment bar 41, 42 may reduce the distance between the first body 10 and the second body 20 at least the first body ( It is possible to separate it by the length of 10). Therefore, it is possible to easily avoid obstacles formed around the pipe (may be the preheating pad (C) of FIG. 10, etc.), and to proceed with the welding operation, and since structural stability is also maintained, a more precise operation of the welding torch 210 is also possible. The entire operation process of the pipe welding device 1 will be described later in more detail.

6 is a partially enlarged view of a second body of the pipe welding apparatus of FIG. 1.

The above-described second body 20 may have a structure specifically as shown in FIG. 6. The second body 20 is a movable joint part 240 is connected to the second driving part 220 by using the second driving part 220 having a linear motion structure as a base, and the movable joint part 240 is again a welding torch. It may be formed in a structure that supports 210 and the third driving unit 230. The third driving part 230 may be formed on the movable joint part 240 adjacent to the welding torch 210. The second driving unit 220 includes a first screw 222 disposed in the radial direction of the pipe, a first moving block 223 that is screwed to the first screw 222 to move linearly, and a second motor that provides a driving force. 221, and a belt connection part 224 connected between the second motor 221 and the first screw 222 to transmit a driving force. The movable joint part 240 has one end fixed to the first moving block 223 and the other end extending toward the welding torch 210 to support the welding torch 210. A housing (refer to the dotted line) is formed on the outside of the second driving unit 220, so that the first distance adjustment bar 30 and the second distance adjustment bar 41 and the fixed coupling state can be maintained through the housing. have.

Since the movable joint part 240 is bendable, it is possible to more conveniently change the arrangement of the welding torch 210. As shown in FIG. 2, the movable joint part 240 may include a hinge shaft 241, and different portions of the fixed support part 242 and the movable support part 243 are bent through the hinge shaft 241. It can be formed by combining possible. The fixed support portion 242 and the movable support portion 243 may have a non-standardized shape and may be formed using various types of housings or frame structures. The fixed support part 242 is coupled to the above-described second driving unit 220, and in particular, may be coupled to the first moving block (see 223 in FIG. 6) of the second driving unit 220. The movable support part 243 extends toward the welding torch 210 and is connected to the third driving part 230 and the welding torch 210 to support them. By rotating the movable support part 243 around the hinge shaft 241, the angle with respect to the fixed support part 242 can be changed, through which the movable support part 243 is connected and supported by the entire arrangement of the welding torch 210 You can change it. Through this, consumables (welding wires, welding tips, etc.) used in the welding torch 210 can be more easily exchanged, and cutting of the welding wire can be conveniently performed. In addition, a part that is difficult to access due to the welding torch 210 can be exposed and repaired more easily. The movable joint part 240 includes a guide groove 244 perforated in a curved shape around the hinge shaft 241 and a position fixing screw 245 that is inserted into the guide groove 244 to limit the movement of the movable joint part 240. ) May be included, and the shape may be maintained by tightening the positioning screw 245 at a desired position.

The third driving unit 230 is disposed adjacent to the welding torch 210. The third driving part 230 may be connected to the movable support part 243 side of the movable joint part 240 described above, and may be integrally moved with the welding torch 210 according to the refractive state of the movable joint part 240. As shown in Figure 6, the third driving unit 230 is a rotation module in which a rotation gear 233 is formed which rotates by being engaged with the worm gear 232 and the worm gear 232 and adjusting the inclination angle of the welding torch 210 ( 234), and a distance adjusting screw 235 that fixes the welding torch 210 to the rotation module 234, but rotates by being screwed and adjusts the distance between the rotation center of the rotation module 234 and the welding torch 210. Can include. The worm gear 232 may be rotatably coupled to one side of the movable support part (refer to 243 in FIG. 2) of the movable joint part 240, and may be rotated by a third motor 231. The rotation gear 233 rotating around an axis perpendicular to the rotation axis of the worm gear 232 (which may be the same axis as the rotation axis of the third motor 231) may be engaged with the worm gear 232 as shown. Through this, the rotational amount of the worm gear 232 can be adjusted to rotate the rotation gear 233 and the angle of the entire rotation module 234 connected to the rotation gear 233 can be changed.

Since the rotation module 234 is connected to the welding torch 210 through the distance adjusting screw 235, the welding torch 210 is continuously operated by the worm gear 232, the rotation gear 233, and the rotation module 234. The rotation angle of can be easily changed. Due to the meshing structure of the worm gear 232 and the rotation gear 233, unnecessary reverse rotation is prevented and the rotation angle can be more stably maintained. The rotation of the welding torch 210 by the third driving unit 230 is made on a plane parallel to the cross-section of the pipe (see B in FIG. 10), and through this, the direction in which the end of the welding torch 210 is directed is the direction of gravity and the pipe. It can be changed appropriately between the directions toward the center of. For example, when the pipe welding device 1 travels around the pipe, its position changes to the top, side, or bottom of the pipe, the direction of gravity for the device is changed, and more precise control of the welding area (melt formed on the welding area, etc.) May include control of] may be necessary. This operation can be smoothly performed by changing the rotation angle of the welding torch 210 using the third driving unit 230.

The welding torch 210 may be connected to the rotation module 234 through a distance adjusting screw 235. As shown in FIG. 6, the distance adjusting screw 235 may pass through one side of the head 211 of the welding torch 210 and may be screwed with the rotation module 234. When the distance adjustment screw 235 is rotated, the welding torch 210 moves in the longitudinal direction of the distance adjustment screw 235 by screwing, and the distance with the rotation module 234 may be changed. Since the handle 235a is formed on the distance adjusting screw 235, the distance adjusting screw 235 can be rotated by manipulating the handle 235a. In particular, the distance adjusting screw 235 is arranged toward the rotation center of the rotation module 234 (which may be the axis of the rotation gear 233) through the head 211 of the welding torch 210, so the distance adjusting screw 235 ) To adjust the distance between the welding torch 210 and the rotation center of the rotation module 234. Through this, it is possible to more precisely adjust the distance between the welding torch 210 and the pipe. That is, the distance between the welding torch 210 and the outer circumference of the pipe is adjusted through the linear motion of the second driving unit 220, and the rotation angle of the welding torch 210 is changed through the rotational movement of the third driving unit 230. In addition, the distance between the welding torch 210 and the outer peripheral surface of the pipe may be more precisely adjusted using the distance adjusting screw 235. In this way, the welding torch 210 can be adjusted in various ways by utilizing various driving units and various adjustment structures independently arranged on the second body 20 and welding can be performed smoothly.

7 is a partial enlarged view of the first body of the pipe welding apparatus of FIG. 1, FIG. 8 is an operation diagram of a movement control unit of the pipe welding apparatus of FIG. 1, and FIG. 9 is an operation of a contact wheel of the pipe welding apparatus of FIG. Is also. FIG. 8 shows the bottom of the first body, and FIG. 9 shows the rear of the first body.

As shown in FIG. 7, the first body 10 includes an accommodation space 101 therein. As described above, the receiving space 101 can be exposed by opening the blocking cover (see 102 in Fig. 1), through which the chain (see A in Figs. 8 and 10), etc. can be easily used to couple and pass inside. I can. In the first body 10, a sprocket is disposed across the receiving space 101 and engaged with the chain. The sprocket is connected to the first driving unit 120 to rotate the first sprocket 111, the second sprocket disposed spaced apart from the first sprocket 111 (see 112 in FIG. 8), and the interior of the receiving space 101. It may include a third sprocket (see 113 of FIG. 8) in which a distance to the second sprocket 112 is changed by moving in parallel. The first driving unit 120 is disposed between the first motor 121 and the first motor 121 and the first sprocket 111 to transmit the driving force of the first motor 121 to the first sprocket 111. It may include driving gears 122, 123, 124. The driving gears 122, 123, 124 may be formed in plural, one of which is coupled to the first motor 121 and the other is coupled to the first sprocket 111, and is a driving gear positioned therebetween. Can be adjusted. The arrangement of the drive gear need not be limited as shown and can be variously changed.

At both ends of the third sprocket 113, a pair of guide screws (see 114 and 115 in Fig. 8) that are vertically connected to the third sprocket 113 to rotate forward and backward, and move the third sprocket 113 in parallel. Can be formed. The third sprocket 113 moves in parallel toward the fixed second sprocket 112 and can adjust the coupling state with the chain. In particular, a pair of guide screws 114 and 115 and guide screws 114 and 115 It is possible to move more stably in parallel by the moving control unit 130 to be driven. The movement control unit 130 is located between the guide screws 114 and 115, and is engaged with both sides of the central gear 131 and the central gear 131 in which a part of the shaft is exposed to the outside so as to be connected to an external driving device. A pair of connection gears 132 and 133 rotating in the opposite direction to the central gear 131, respectively, are coupled to the ends of the guide screws 114 and 115 to engage the connection gears 132 and 133, respectively, and the central gear ( It may include a pair of transmission gears (134, 135) for rotating the guide screws (114, 115) in the same direction as 131. The movement control unit 130 may be formed of a plurality of gears arranged on the frame of the first body 10. Using the structure of the movement control unit 130, the pair of guide screws 114 and 115 are synchronized to operate, and the third sprocket 113 can be stably moved in parallel.

As shown in FIG. 8, a coupling module 131a formed by exposing a part of the shaft to the outside may be disposed at an end of the central gear 131. An external driving device (which may be a device capable of manually or automatically transmitting rotational force) is detachably coupled to the coupling module 131a to rotate the central gear 131 in either left or right direction. When the central gear 131 rotates, the pair of connection gears 132 and 133 rotate in the opposite direction, and a pair of transmission gears 134 and 135 connected to each of the pair of guide screws 114 and 115 Are rotated in synchronization with each other in the same direction as the rotation direction of the central gear 131. Through this, a pair of guide screws 114 and 115 can be rotated in the same direction, and the entire third sprocket 113 connected between the guide screws 114 and 115 can be moved in parallel very stably. Connection blocks 113a and 113b may be formed at both ends of the third sprocket 113, and guide screws 114 and 115 may be screwed through each of the connection blocks 113a and 113b. Accordingly, while the pair of guide screws 114 and 115 rotates, driving force is transmitted to the connection blocks 113a and 113b respectively through a screw thread, so that the third sprocket 113 can be stably moved in parallel.

Using the structure of the movement control unit 130, as shown in FIG. 8, the chain A passing through the accommodation space 101 can be very easily coupled to the sprocket or released. In addition, tension may be adjusted by adjusting the distance between the second sprocket 112 and the third sprocket 113. The chain (A) can be fastened in a form passing through the outside of the third sprocket 113 and being caught by the first sprocket 111 located at the top thereof and then passing through the outside of the second sprocket 112 again, and the third sprocket 113 ) And the rest of the second sprocket 112 that has passed outward may be connected to the periphery of the pipe (see B of FIG. 10). In particular, the second sprocket 112 and the first sprocket 111 are kept in a fixed state to maintain a stable coupling state with the chain (A), and the third sprocket 113 is parallel to the movement control unit 130. By moving in a movable method, it can be combined with the chain (A) simply and more stably. The third sprocket 113 stably moves along a pair of guide screws 114 and 115 and can be in close contact with the chain A. Therefore, while having a movable structure, both ends are provided by guide screws 114 and 115. Stable rotation is possible while being supported and in close contact.

A binding structure for fixing cables or wires connected to the pipe welding device may be formed on the outer surface of the first body 10. As shown in FIG. 7, for example, a clamping member 151 disposed on the outer surface of the first body 10 and one side is open, and the clamping member 151 surrounds the outer side of the clamping member 151 and is in close contact with the clamping member 151 Thus, it is possible to form a binding structure composed of a fixing shackle 152 that presses the clamping member 151. The clamping member 151 may be formed of an elastically deformable material, and the fixing shackle 152 includes a first arm 152a and a second arm 152b formed to be foldable, and the first arm 152a And the second arm 152b may be formed in a structure in which the clamping member 151 crosses and is coupled to each other. For example, when the pressure screw 152c is coupled to the first arm 152a and crosses the second arm 152b, the second arm 152b is pressed with the pressure screw 152c to form the first arm 152a. The distance between the and the second arm 152b may be changed. Through this structure, it is possible to press the inner clamping member 151 and it is possible to very firmly grip the cable or the like inserted into the clamping member 151.

A plurality of contact wheels 160 may be formed on a surface of the first body 10 facing the pipe (see B of FIG. 10) to contact the pipe to separate the first body 10 from the pipe. As shown in Figure 9, the contact wheel 160 may include a base 161 connected to the first body 10 through a movable shaft 162, and the base 161 is centered on the movable shaft 162. As shown by rotation, the arrangement of the entire contact wheel 160 may be changed. By changing the arrangement state of the contact wheel 160, the degree of close contact with the pipe may be adjusted, and if necessary, the first body 10 may be further separated from the pipe. In addition, through this, even when the diameter of the pipe is changed, the device can be easily mounted. The contact wheel 160 may be fixed by a position fixing pin 165 penetrating the base 161 and the position fixing grooves 163 and 164 formed in the frame of the first body 10. The position fixing pins 165 may be coupled to different positions according to a change in the arrangement state, and a plurality of different position fixing grooves 163 and 164 may be formed at corresponding positions, respectively. The contact wheel 160 may be more firmly fixed by passing through the position fixing pin 165 and combining it.

Hereinafter, an example of using the pipe welding device will be described in more detail with reference to FIG. 10.

10 is a view illustrating a state of use of the pipe welding apparatus of FIG. 1.

The pipe welding apparatus 1 may be mounted on the pipe B in a state as shown in FIG. 10. The pipe welding device 1 can perform a welding operation while moving the outer circumferential surface of the pipe (B) along the chain (A) by being caught by a chain (A) mounted around the pipe (B). The chain (A) is connected by surrounding the outer circumferential surface of the pipe (B) as shown, and at least a part is passed through the receiving space (see 101 in Fig. 7) inside the first body 10, and the sprocket inside the receiving space 101 It may be engaged with [the first sprocket 111, the second sprocket 112, and the third sprocket 113]. Particularly, the chain A and the first body 10 are very convenient and robust by moving the third sprocket (see 113 of FIG. 8) in parallel through the operation of the above-described movement control unit (see 130 in FIGS. 7 and 8). It is possible to combine them. The pipe welding device 1 may perform a welding operation while moving the outer circumferential surface of the pipe (B) along the chain (A) in such a coupled state.

At this time, the distance between the first body 10 and the second body 20 is freely adjusted as shown by using the aforementioned first distance adjustment bar 30 and a pair of second distance adjustment bars 41 and 42. Can be adjusted. That is, as shown in Fig. 10 (a), the second body 20 is relatively close to the first body 10, or as shown in Fig. 10 (b), the second body 20 is moved to the first body 10 The welding operation can be performed very conveniently in various states relatively far away from. Through this, even if an attachment such as a preheating pad (C) is widely formed on the outer circumferential surface of the pipe (B), it is easily avoided and welding can be performed conveniently. When the size of the attachment such as the preheating pad (C) is changed, the total length of the first distance adjustment bar 30 and the pair of second distance adjustment bars 41 and 42 may be changed correspondingly. That is, even when preheating or postheating of the pipe (B) is required, the second body 20 on which the welding torch 210 is formed is extended to the outside of the first body 10 and unnecessary interference with the preheating pad (C) is eliminated. And the welding can proceed smoothly. In particular, the first distance adjustment bar 30 and the pair of second distance adjustment bars 41 and 42 form a very strong and stable support structure even in an extended state through the structural features as described above. The concentrated first body 10 and the second body 20 are firmly supported even when spaced apart from each other, and structural stability can be maintained. Through this, it is possible to more precisely adjust the position of the welding torch 210 using the above-described driving structure, and thus improve the quality of the welding operation.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, those of ordinary skill in the art to which the present invention pertains can be implemented in other specific forms without changing the technical spirit or essential features. You can understand. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not limiting.

1: pipe welding device 10: first body
20: second body 30: first distance adjustment bar
31: first frame 32: second frame
32a: protruding piece 33: third frame
34: cover 41, 42: second distance adjustment bar
41a, 42a: sliding rail 41b, 42b: holder
101: accommodation space 102: blocking cover
102a: fixing clip 111: first sprocket
112: second sprocket 113: third sprocket
113a, 113b: connection block 114, 115: guide screw
120: first driving unit 121: first motor
122, 123, 124: drive gear 130: movement control unit
131: central gear 131a: coupling module
132, 133: connection gear 134, 135: transmission gear
140: fourth driving unit 141: fourth motor
142: second screw 143: second moving block
151: clamping member 152: fixed shackle
152a: first arm 152b: second arm
152c: pressure screw 160: contact wheel
161: base 162: movable shaft
163, 164: position fixing groove 165: position fixing pin
210: welding torch 211: head
220: second driving unit 221: second motor
222: first screw 223: first moving block
224: belt connection 230: third driving unit
231: third motor 232: worm gear
233: rotation gear 234: rotation module
235: distance adjusting screw 235a: handle
240: movable joint part 241: hinge shaft
242: fixed support 243: movable support
244: guide groove 245: positioning screw
A: Chain B: Pipe
C: preheating pad

Claims (5)

A receiving space that is hooked on a chain mounted around a pipe and moves around the pipe along the chain and passes the chain, at least one sprocket disposed across the receiving space and engaged with the chain, and the sprocket A first body connected to the first body including a first driving part for rotating the sprocket;
The welding torch is located spaced apart from the first body in the longitudinal direction of the pipe, the end of which faces the outer circumferential surface of the pipe, a second driving part for linearly moving the welding torch in one direction, and one side of the welding torch A second body disposed and including a third driving unit for changing an angle of the welding torch;
A first distance adjustment bar extending from the first body toward the second body to support the second body and to be stretchable; And
And a pair of second distance adjustment bars that are spaced apart from the first distance adjustment bar and protrude from both sides of the first body and the second body, respectively, and are slidably connected to each other between the first body and the second body. Pipe welding device. The method of claim 1,
The second body further comprises a movable joint part that forms a connection part connecting the second driving part and the welding torch, and is bent about a hinge axis to change an arrangement state of the welding torch. The method of claim 1,
The third driving unit includes a worm gear, a rotation module having a rotation gear engaged with the worm gear and rotating to adjust the inclination angle of the welding torch, and fixing the welding torch to the rotation module, but rotating by screwing. Pipe welding apparatus comprising a distance adjusting screw for adjusting the distance between the rotation center and the welding torch. The method of claim 1,
The sprocket is a first sprocket connected to the first driving unit and rotated, a second sprocket disposed to be spaced apart from the first sprocket, and a third sprocket moving in parallel to the inside of the accommodation space to change the distance to the second sprocket. Including sprockets,
A pipe welding apparatus further comprising a pair of guide screws at both ends of the third sprocket vertically connected to the third sprocket to rotate forward and backward, and move the third sprocket in parallel. The method of claim 4,
The second body is positioned between the guide screws and is a central gear with a part of the shaft exposed to the outside so as to be connected to an external driving device, and is engaged with both sides of the central gear to rotate in a direction opposite to the central gear, respectively. Pipe further comprising a movement control unit including a pair of connection gears, and a pair of transmission gears each coupled to an end of the guide screw and engaged with the connection gear to rotate the guide screw in the same direction as the center gear Welding device.

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