KR101150354B1 - Apparatus for ball valve overlay welding - Google Patents

Abstract

PURPOSE: An automatic overlay welding apparatus for a ball valve is provided to implement machining over the whole surface of a ball valve by driving an arm rotating shaft to transfer the welding point of a welding machine one pitch for every one rotation of the ball valve. CONSTITUTION: An automatic overlay welding apparatus for a ball valve comprises a mount(10), a U-shaped arm(30), a ball valve rotating shaft(300), a fixing chuck, a first servo motor(200), a second servo motor(310), a welding machine, and a controller. The U-shaped arm couples a central axis to an arm rotating shaft(20) formed in the mount. The ball valve rotating shaft is formed on both ends of the U-shaped arm. The fixing chuck is coupled to the ball valve rotating shaft and fixes a ball valve(40), base metal for welding. The first servo motor rotates the arm rotating shaft. The second servo motor rotates the ball valve rotating shaft. The welding machine implements welding on the ball valve using a torch which contacts an upper one point of the ball valve fixed by the fixing chuck. The controller controls the first servo motor, the second servo motor, and the welding machine.

Description

Apparatus for Ball valve overlay welding}

The present invention and the mount is fixed to the ground; A U-shaped arm having a central axis coupled to an arm rotation axis formed on the mount; Ball valve rotary shafts formed at both ends of the U-shaped arm; A fixed chuck coupled to the ball valve rotating shaft to fix the ball valve to be a welding base material; A first servomotor connected to the arm rotation shaft to rotate the arm rotation shaft; A second servomotor connected to the ball valve rotating shaft to rotate the ball valve rotating shaft; A control unit for controlling driving of the first servomotor, the second servomotor, and the welding machine; A welding machine for welding by contacting a welding torch to one point above the ball valve fixed to the fixed chuck; Configured to drive the ball valve rotating shaft to rotate the ball valve one time so that one-point welding of the welder is guided to the ball valve surface one rotation welding, and the arm rotating shaft is driven to the welder per one rotation of the ball valve. It relates to a ball valve auto-growth welding apparatus characterized by performing a pitch of a welding point of 1 to perform the entire surface processing of the ball valve.

The present invention relates to an apparatus for welding coating the ball valve to be installed in the pipeline of the high pressure fluid to improve the leakage prevention function of the high pressure fluid and to extend the service life.

In general, ball valves are mainly installed in the pipelines of high pressure fluids such as gas with high pressure, and ball valves are normally provided with opening and closing balls mounted in the valve chamber when the steering wheel is exposed to the top of the valve body. It is configured to allow or block the flow of high pressure fluid while rotating in contact with the ring.

In the conventional ball valve, a precision machined metal material (stainless steel) is used.

However, in the conventional ball valve, since the seat is always in close contact with the outer circumferential surface, it is possible to prevent the leakage of the high pressure fluid in the early stage of use, but the frequent use of the outer circumferential surface and the inner surface of the seat occurs due to frequent wear. There was a problem of leaking without sealing the high pressure of the fluid.

In order to solve the above problems, the wear-resistant electrode coating layer is precisely formed on the outer circumferential surface of the ball valve to significantly extend the service life of the ball valve.

The wear-resistant electrode coating layer is mainly performed by overlay welding. The overlay welding is a method of applying a welding metal having excellent wear resistance, corrosion resistance, and heat resistance to a base material having a thickness of about 1 mm or more. Welding is a wear or corrosion resistant coating on the surface of a material in order to reduce the loss caused by wear or environmental influences.

Since the overlay welding is completely fused with the base metal, the bonding strength is higher than that of the base metal, and the welding speed is higher, so the work efficiency is good, the thickness of the overlay layer is easily controlled, and the overlay weld metal is metallized in an inert gas atmosphere in the slag. The quality is excellent and has the advantage that there is no limit on the size of the product to be overlaid.

In particular, when the overlay welding requires a certain mechanical property on the surface, the lining is made of a cheap material for economic or workability, and then the surface welding is known as a surface treatment welding wrapped in two to three layers by welding. Stellite (alloy containing Cr, Tu and Mo mixed with Co) is mainly used for the surface.

The use of welding, rather than coating, for the surface treatment is not only because Stellite has a low melting point as in the case of Galvanizing (Zn plating), but also in the case of coating, there is some limitation in the thickness of the coating that can be made. If you choose the method, there is an advantage that you can adjust the thickness of about 2-3 layers depending on the desired thickness.

Overlay welding is classified into gas welding, arc welding, friction welding, and laser surface modification. Among them, the arc overlay welding method using electric arc and plasma arc is most commonly used.

On the other hand, the ball ball mainly used in large pipelines, due to its size and weight, despite the advantages of forming the overlay welding and the wear-resistant electrode coating layer on the outer peripheral surface, there is a problem that it is very difficult to perform the overlay welding on the outer peripheral surface .

The present invention is to solve the above problems, an object of the present invention is to provide a ball valve automatic raising welding device for solving the difficulty of overlay welding due to the size and weight of the ball valve in forming a ball valve wear-resistant electrode coating layer.

In order to achieve the above object, the present invention includes a mount fixed to the ground; A U-shaped arm having a central axis coupled to an arm rotation axis formed on the mount; Ball valve rotary shafts formed at both ends of the U-shaped arm; A fixed chuck coupled to the ball valve rotating shaft to fix the ball valve to be a welding base material; A first servomotor connected to the arm rotation shaft to rotate the arm rotation shaft; A second servomotor connected to the ball valve rotating shaft to rotate the ball valve rotating shaft; A control unit for controlling driving of the first servomotor, the second servomotor, and the welding machine; A welding machine for welding by contacting a welding torch to one point above the ball valve fixed to the fixed chuck; Configured to drive the ball valve rotating shaft to rotate the ball valve one time so that one-point welding of the welder is guided to the ball valve surface one rotation welding, and the arm rotating shaft is driven to the welder per one rotation of the ball valve. The ball valve automatic raising welding apparatus characterized by carrying out the whole surface processing of the said ball valve by conveying the welding point of 1 pitches is a technical summary.

Here, the control unit is preferably a ball valve automatic raising welding device, characterized in that for controlling the rotational speed of the ball valve rotation axis per pitch rotation of the arm so that the welding speed of the welder on the surface of the ball valve is constant. Do.

In addition, the ball valve automatic fusing welding apparatus is configured to include a welding base material sensor to the welder and the control unit receives a signal from the welding base material detection sensor, coupled to the welder when the ball valve rotation by the ball valve rotation axis It is preferable to be a ball valve automatic raising welding device characterized in that the welding is stopped when the ball reaches.

The welding machine may further include: a torch arm to which the welding torch is coupled; A sliding base slidingly coupled to the torch arm; A vertical mount coupled to the sliding base and rotated by a torch rotation shaft; A lower mount to which the torch rotation shaft of the vertical mount is coupled; A spindle motor controlled by the controller to rotate the torch rotation shaft; It is preferable that the ball valve is automatically raised and welded, characterized in that, after the end of welding, the welding torch is rotated and avoided when the ball valve is replaced.

According to the present invention, there is an advantage in that the ball valve automatic raising welding apparatus for solving the difficulty of overlay welding due to the size and weight of the ball valve in forming the ball valve wear-resistant electrode coating layer.

1 is a side view of the ball valve fixed state of the present invention
2 is a front view of the present invention
3 is a plan view of the ball valve fixed state of the present invention
4 is a control circuit block diagram of the present invention.
Figure 5 is a ball valve rotation angle configuration diagram by the arm rotation axis of the present invention
6 is a welding line diagram formed by driving the arm rotating shaft and the ball valve rotating shaft of the present invention.
Figure 7 is a block diagram showing the surface speed of the ball valve of the present invention, Figure 8 is a block diagram showing the ball valve surface welding line of the present invention.

Hereinafter, the present invention will be described with reference to the drawings. In the following description of the present invention, a detailed description of related arts or configurations will be omitted when it is determined that the gist of the present invention may be unnecessarily obscured will be.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to be exemplary, self-explanatory, allowing for equivalent explanations of the present invention.

1 is a side view of the ball valve fixed state of the present invention, FIG. 2 is a front view of the present invention, FIG. 3 is a plan view of the ball valve fixed state of the present invention, and FIG. 4 is a block diagram of the control circuit of the present invention. 5 is a ball valve rotation angle configuration diagram by the arm rotation axis of the present invention, Figure 6 is a welding line diagram formed by driving the arm rotation axis and the ball valve rotation shaft of the present invention, Figure 7 is a ball valve surface speed of the present invention 8 is a configuration diagram showing a ball valve surface welding line of the present invention.

The present invention relates to a ball valve automatic raising welding device for forming a wear-resistant welding rod coating layer on the outer circumferential surface of the ball valve, the mount 10 and the arm rotating shaft 20, the U-shaped arm 30 and the ball valve rotating shaft 300 And a fixed chuck 315, a first servomotor 200, a second servomotor 310, a controller 60, and a welding machine 50.

Mount 10 of the present invention is firmly fixed to the ground, as shown in Figures 1 to 3, U-shaped arm 30 and ball valve 40 is coupled to the arm rotating shaft 20 is coupled continuously A pedestal that supports the same component.

That is, the mount 10 has a weight and structure fixed to the ground so as to withstand the weight of all components coupled to the mount 10, such as the U-shaped arm 30 and the ball valve 40.

The U-shaped arm 30 of the present invention is an actuator in which a central axis is coupled to an arm rotation shaft 20 formed in the mount 10.

As shown in FIG. 3, the central axis is a central line for symmetrically cutting the U-shaped arm 30, which is coupled to the mount 10 by the arm rotation axis 20.

The arm rotation shaft 20 is formed to rotate on the mount 10, and is rotated by the first servomotor 200 of the present invention.

Accordingly, the first servomotor 200 is a driving device for rotating the U-shaped arm 30 through the arm rotation shaft 20.

For this purpose, the arm rotation shaft 20 is preferably formed in a position capable of full rotation in the mount (10).

In the embodiment of Figures 1 to 3, the arm rotation axis 20 is formed in a horizontal direction on the ground, the U-shaped arm 30 is also coupled to the ground horizontally, the technical gist of the present invention is necessarily The arm rotation shaft 20 and the U-shaped arm 30 may be provided in a vertical direction with respect to the ground, without being limited thereto.

The first servo motor 200 is installed on the mount 10 to apply a force to the arm rotation shaft 20 to rotate the arm rotation shaft 20 while being supported by the mount 10. Do.

The ball valve rotary shaft 300 of the present invention is formed at both ends of the U-shaped arm 30, the ball valve rotary shaft 300 has a fixed chuck 315 for fixing the ball valve 40 to be a welding base material Combined.

A second servomotor 310 for rotating the ball valve rotation shaft 300 is connected to the ball valve rotation shaft 300.

Accordingly, when the second servomotor 310 is driven, the ball valve rotation shaft 300 is rotated, and as a result, the fixed chuck 315 coupled to the ball valve rotation shaft 300 is rotated.

Since the ball valve 40, which is a welding base material, is fixed to the fixed chuck 315, the ball valve 40, which is a welding base material, is rotated as a result of the second servomotor 310.

Since the second servo motor 310 also needs to transmit rotational force to the ball valve rotation shaft 300, the ball valve is supported at both ends of the U-shaped arm 30 so as to be supported by the U-shaped arm 30. It is coupled while connecting to the rotating shaft (300).

The first servomotor 200 and the second servomotor 310 rotate the arm rotation shaft 20 and the ball valve rotation shaft 300, respectively, and consequently rotate the ball valve 40 in two axial directions. It becomes a driving device.

A device similar to the driving device is an astronomical telescope, the present invention is the equator mount of the astronomical telescope corresponds to the mount 10 of the present invention, the declination tracking device is the first servo motor 200 and the arm rotation axis 20 And the RA tracking device becomes the second servomotor 310 and the ball valve rotating shaft 300.

The difference between the present invention and the astronomical telescope is that the axial telescope is formed such that the arm rotation axis is inclined by the installation latitude inclination angle. Any position of the sphere surface of the in ball valve may be located at a specific point.

Looking at the ball valve 40, which is the welding base material of the present invention, to perform the function of the valve to open or close the pipeline in the installed pipeline, the fluid through which is rotated in the pipeline to open the pipeline is formed while passing through the body And a coupling hole for installing in the conduit is formed in the vertical direction of the fluid through hole.

As shown in FIG. 3 of the present invention, the fixing guide 311 having the chuck coupling part 320 is inserted into the fluid through hole of the ball valve 40, and the chuck coupling part 320 is fixed to the chuck 315. And the ball valve 40 is fixed to both ends of the U-shaped arm 30.

However, the fixing position of the ball valve 40 of the fixed chuck 315 is not necessarily limited thereto, and may be coupled to the coupling hole of the ball valve 40, which is a desired design level and the ball valve 40. It depends on the state of processing.

However, in the case of the coupling hole is formed in a structure suitable for installation in the conduit, it may be combined by modifying the fixing chuck 315 to the same structure as the installation in the conduit.

The welder 50 of the present invention is a device for welding the welding torch 500 in contact with one point above the ball valve 40 fixed to the fixed chuck 315 as shown in FIGS. 1 and 5.

The welding machine 50 is installed in the welding mount 10 for placing the welding torch 500 high in order to form a welding spot by contacting the welding torch 500 above the ball valve 40.

The reason why the welding torch 500 is positioned above the ball valve 40 is that the welding state is best formed when the welding torch is welding downward.

The weld mount 10 comprises a torch arm 520, a sliding base 530, a vertical mount 10, a lower mount 10, and a spindle motor (not shown), wherein the torch arm 520 is welded. Torch 500 is coupled to form a horizontal frame to guide the welding torch 500 to the upper end of the ball valve 40.

The sliding base 530 of the present invention is a slider slidingly coupled to the torch arm 520.

The vertical mount 10 is coupled to the sliding base 530, and the torch arm 520 slides on the sliding base 530 to be supported while varying the length of the torch arm.

The lower mount 10 is a base mount on which the vertical mount 10 is mounted. A torch rotation shaft 540 is installed, and the vertical mount 10 is coupled to the torch rotation shaft 540 to rotate.

The torch rotation shaft 540 is connected to a spindle motor (not shown) controlled by the controller 60 to rotate the torch rotation shaft 540.

Therefore, the welding torch 500 is positioned or moved on the upper end of the ball valve 40 under the control of the controller 60.

In the present invention, after the end of the welding, by rotating the welding torch 500 through the control unit 60 to avoid in the main work space, it is easy to replace the ball valve 40.

As shown in FIG. 4, the control unit 60 of the present invention is a circuit unit for controlling driving of the first servo motor 200, the second servo motor 310, and the welding machine 50.

Therefore, in the present invention, the U-shaped arm 30 rotates, the ball valve 40 rotates, and welding is performed by the control signal of the control unit 60.

Hereinafter, the control of the controller 60 will be described.

The present invention is an apparatus for surface treatment by overlay welding the surface of the ball valve 40 with a welding rod made of a material of high wear resistance.

Therefore, the welder 50 is preferably used by selecting the welder 50 suitable for overlay welding according to the purpose of the ball valve.

The present invention guides the welder 50 to weld the entire surface of the ball valve 40, the welder 50 is a one-point welding does not change the position of the welding point during the overlay welding process (the present invention) In the state where welding is performed without moving the welding torch.), And the ball valve rotating shaft 300 rotates the ball valve 40 one time, so that the one-point welding The arm rotation shaft 20 guides the ball valve 40 by one welding pitch to repeat the round welding.

If one round welding of the ball valve rotation shaft 300 is continuously performed per one welding pitch movement of the arm rotation shaft 20, the result is that overlay welding is performed on the entire surface of the ball valve by one-point welding.

In detail, as shown in FIG. 5, the welding torch 500 is fixed at the one point of the upper end of the ball valve 40 capable of optimal welding.

The ball valve is rotated in the range shown in FIG. 5 as the arm rotation shaft 20 rotates, and the ball valve 40 is rotated at a predetermined arm rotation shaft angle according to the rotation of the ball valve rotation shaft 300. Generate a rotational motion as shown in 6.

As shown in FIG. 6, a single welding line 5 is formed at the ball valve surface by one rotation of the ball valve rotating shaft 300 by one-point welding of the welding torch 500.

After the formation of the one welding line, the arm rotation shaft is moved by one welding pitch, and one rotation welding by the ball valve rotation shaft 300 is repeatedly performed to weld the entire surface of the ball valve 40.

On the other hand, the quality of the surface coating of the ball valve 40 is determined by a constant welding thickness, the welding thickness is kept constant by a constant welding speed.

By the way, if the rotational speed of the ball valve shaft 300 is constant without variation, the surface speed at any one point of the ball valve 40 will vary depending on the surface position.

In detail, since the radius of the circumferential welding in the ball valve 40 is different for each welding pitch as shown in FIG. 6, the rotation speed of the surface of the ball valve 40 as shown in FIG. 7 is equal to the peripheral speed F1. The central velocity F2 is different.

That is, when the speed of the ball valve rotation shaft 300 is constant, as shown in FIG. 7, since the welding speed is different at each welding pitch, the overlay welding thickness per pitch is formed differently.

In the present invention, in order to solve this problem, the speeds of the first servo motor 200 and the second servo motor 310 are varied for each pitch under the control of the controller 60.

That is, the control unit 60 is such that the welding speed welded on the surface of the ball valve 40 is constant (that is, the speed of F1 and F2 in FIG. 7 is the same) per one pitch rotation of the arm rotation shaft 20 One rotational speed of the ball valve rotary shaft 300 is varied.

On the other hand, the ball valve 40 is formed on the surface of the coupling hole for mounting to the mechanical equipment, when the fixed chuck 315 is coupled to the fluid through hole coupling hole formed in the vertical position of the fluid through hole is the overlay welding The welding torch will pass through (in the manner of coupling to the coupling hole, the fluid through will pass through the welding torch).

However, since the coupling hole is a portion that is embedded in the surface of the ball valve 40, the welding torch is not in contact with the welding hole, and thus welding is impossible in this portion. There is a risk of damage.

In the present invention, in order to prevent this, the welding machine 50 includes a welding base material detecting sensor 501, and the control unit 60 receives the signal of the welding base material detecting sensor 501 as shown in FIG. Received, when the coupling hole reaches the welding machine 50 when the ball valve 40 rotates by the ball valve rotary shaft 300 as shown in FIG. 8 to control the welding stops and skips.

It will be apparent to those skilled in the art that the present invention may be embodied in many other specific forms without departing from the spirit or essential characteristics thereof.

Therefore, the present invention is not limited to the above-described embodiments, and various changes can be made by any person having ordinary skill in the art without departing from the gist of the present invention as claimed in the following claims. It will be said that the technical spirit of this invention is to the extent possible.

10: mount 20: arm rotation axis
30: U-shaped arm 40: ball valve
50: welding machine 60: control unit
200: first servomotor 300: ball valve rotation shaft
310: second servomotor 315: fixed chuck

Claims (4)

A mount fixed and supported on the ground;
A U-shaped arm having a central axis coupled to an arm rotation axis formed on the mount;
Ball valve rotary shafts formed at both ends of the U-shaped arm;
A fixed chuck coupled to the ball valve rotating shaft to fix the ball valve to be a welding base material;
A first servomotor connected to the arm rotation shaft to rotate the arm rotation shaft;
A second servomotor connected to the ball valve rotating shaft to rotate the ball valve rotating shaft;
A welding machine for welding the ball valve by contacting a welding torch at an upper point of the ball valve fixed to the fixed chuck;
A control unit for controlling driving of the first servomotor, the second servomotor, and the welding machine;
Composed
The ball valve is rotated to drive the ball valve by one rotation so that one-point welding of the welder is guided to the ball valve surface by one rotation, and the arm rotation shaft is driven to weld the welder per revolution of the ball valve. A ball valve auto-growth welding apparatus, wherein the ball valve is conveyed by one pitch and the entire surface of the ball valve is processed. The method of claim 1, wherein the control unit
And a ball valve auto-growth welding apparatus for controlling the rotation speed of the ball valve rotation shaft per pitch rotation of the arm rotation shaft so that the welding speed of the welder is constant on the surface of the ball valve. According to claim 2, wherein the ball valve automatic raising welding apparatus
The welding machine includes a welding base metal sensor and
The control unit receives the signal from the welding base metal detection sensor, the ball valve automatic breeding welding apparatus, characterized in that the welding stops when the coupling hole reaches the welder when the ball valve is rotated by the ball valve rotation shaft. According to claim 1, wherein the welder
A torch arm to which the welding torch is coupled;
A sliding base slidingly coupled to the torch arm;
A vertical mount coupled to the sliding base and rotated by a torch rotation shaft coupled to the sliding base;
A lower mount to which the torch rotation shaft of the vertical mount is coupled;
A spindle motor controlled by the controller to rotate the torch rotation shaft;
Configured including welder mount
And the welding torch is raised as the welding mount to be in contact with the upper side of the ball valve, and after completion of welding, the welding torch is rotated and avoided when the ball valve is replaced.

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