Automatic surfacing equipment for spherical surface of ball body of ball valve

Abstract

The utility model discloses automatic surfacing equipment for a spherical surface of a ball body of a ball valve. The automatic surfacing equipment comprises a rack, a welding gun walking mechanism, a slewing mechanism, a workpiece rotating mechanism and an auxiliary mechanism, the welding gun walking mechanism is arranged above the machine frame, the rotating mechanism is arranged on the upper portion of the front end of the machine frame in a rotating mode, the workpiece rotating mechanism is fixedly installed at one end of the rotating mechanism, and the auxiliary mechanism is fixedly installed at the other end of the rotating mechanism. The full-automatic surfacing device can realize full-automatic surfacing of the spherical surface of the ball body of the ball valve. The cladding speed is high, and the production efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of welding, in particular to an automatic surfacing welding device for the spherical surface of a ball valve. Background Art

[0002] Plasma surfacing uses plasma arc as heat source. The high temperature generated by plasma arc is applied to the powder feeder to feed powder to the welding gun. The plasma arc rapidly heats the alloy powder and the substrate surface and melts, mixes, and diffuses them together. With the relative movement of the welding gun and the workpiece, the plasma arc self-cools after leaving. The liquid alloy gradually solidifies to form a high-performance alloy layer, thereby achieving a surfacing process that strengthens and hardens the surface of the part. It is usually used to repair worn and cracked parts. As an economical and fast process method for material surface modification, it is increasingly widely used in the manufacturing and repair of parts in various industrial sectors.

[0003] Ball valves are widely used. In my country, ball valves are widely used in oil refining, long-distance pipelines, chemicals, papermaking, pharmaceuticals, water conservancy, electricity, municipal administration, steel and other industries, and they play an important role in the national economy. In industrial processes and pipeline systems, ball valves are crucial components used to control the flow of media. It has a 90-degree rotation action, the plug body is a sphere, and there is a circular through hole or channel passing through its axis. However, the ball valve sphere is eroded by materials for a long time, causing friction, causing serious impact wear, which cannot meet normal production and shortens the equipment life cycle. The way to solve this service life is mostly to perform surface surfacing, surfacing a layer of alloy layer to enhance the wear resistance and corrosion resistance of the valve. At present, the surfacing of ball valves mostly adopts two processes: oxyacetylene spray welding and plasma cladding surfacing welding: oxyacetylene spray welding is mostly manual operation, with low efficiency and poor bonding. Plasma cladding welding is not suitable for manual cladding, so semi-automatic methods are mostly used. Due to the existence of the central empty space of the ball valve, the limitation of the size of the welding gun, the thermal barrier of the product after welding, and the difficulty in disassembly, it is difficult to achieve fully automatic cladding with conventional equipment. Therefore, it is necessary to develop a fully automatic ball valve welding equipment. Utility Model Content

[0004] The utility model aims to provide an automatic cladding device for the spherical surface of a ball valve with fast cladding speed and high production efficiency, so as to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] An automated surfacing device for the spherical surface of a ball valve comprises a frame, a welding gun travel mechanism, a swivel mechanism, a workpiece rotating mechanism and an auxiliary mechanism; the welding gun travel mechanism is arranged above the frame, the swivel mechanism is rotatably arranged at the front upper part of the frame, the workpiece rotating mechanism is fixedly installed at one end of the swivel mechanism, the auxiliary mechanism is fixedly installed at the other end of the swivel mechanism, a bracket is placed on the front of the frame, and an operation control box is arranged on the upper part of the bracket.

[0007] Furthermore, a transverse slide plate is provided at the bottom of the welding gun traveling mechanism, and the transverse slide plate is fixedly mounted on the upper part of the slide block which is slidably connected to the transverse slide rail.

[0008] Furthermore, a lifting bracket is fixedly installed on the upper part of the transverse sliding plate, two sets of lifting slide rails are arranged on one side of the lifting bracket, and a sliding frame is installed on the upper end of the lifting bracket through the lifting slide rails; a welding gun front and rear feed module is slidably arranged inside the sliding frame, and an oscillator is arranged at the front end end of the welding gun front and rear feed module.

[0009] Furthermore, a gun clamp mounting plate is fixedly mounted on the front end of the oscillator, a welding gun clamp is fixedly mounted on the lower part of the gun clamp mounting plate, and a welding gun is fixedly clamped inside the welding gun clamp to hold the welding gun.

[0010] Furthermore, the head welding assembly of the workpiece rotating mechanism is fixedly installed at one end of the slewing mechanism, a slewing bearing is rotatably installed on the upper front end of the head welding assembly, a gear is rotatably installed on the lower part of the slewing bearing, a turntable is fixedly installed at the front end of the slewing bearing, and a three-jaw chuck is fixedly installed at the front end of the turntable.

[0011] Furthermore, a spherical welding fixture is arranged on the three-jaw chuck.

[0012] Furthermore, a group of accordion protective covers symmetrically distributed up and down are arranged between the end of the lifting bracket and the end of the sliding frame; a group of accordion protective covers symmetrically distributed left and right are arranged between the rear end of the upper part of the frame and the side of the transverse slide.

[0013] Furthermore, a vertical drag chain is provided on the lifting bracket, and the end of the vertical drag chain extends to the back of the lifting bracket; a longitudinal drag chain is provided on the front and rear feed module of the welding gun, and the end of the longitudinal drag chain extends to the bottom of the front and rear feed module of the welding gun; a transverse drag chain is provided on the frame, and the end of the transverse drag chain extends to the side end of the lifting bracket.

[0014] Furthermore, a powder collection box is placed at the bottom of the front end of the frame.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The utility model can position and clamp the workpiece through the spherical welding fixture, and then clamp and fix the spherical welding fixture with a three-jaw chuck, and center the workpiece through the auxiliary mechanism; the control panel controls the rotary mechanism, the workpiece rotating mechanism and the welding gun walking mechanism, so that the welding gun is always in the position where the spherical surface of the sphere needs to be clad for welding, and the spherical surface of the sphere is fully automated. The cladding speed is fast and the production efficiency is high. By cladding alloy powder on the spherical surface of the sphere, the reliable operation of the ball valve is ensured and its service life is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0018] Figure 2 It is a schematic diagram of the traveling mechanism of the welding gun of the present utility model.

[0019] Figure 3 It is a schematic diagram of the workpiece rotating mechanism of the utility model.

[0020] In the figure: 1-frame; 2-welding gun travel mechanism; 3-slewing mechanism; 4-workpiece rotation mechanism; 5-auxiliary mechanism; 6-bracket; 7-operation control box; 8-welding fixture; 9-transverse slide; 10-transverse slide rail; 11-lifting bracket; 12-lifting slide rail; 13-sliding frame; 14-front and rear feeding module of welding gun; 15-oscillator; 16-gun clamp mounting plate; 17-welding gun clamp; 18-welding gun; 19-machine head welding assembly; 20-slewing bearing; 21-turntable; 22-three-jaw chuck; 23-gear; 24-powder collection box. DETAILED DESCRIPTION

[0021] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0022] See also Figure 1-2 , an automated surfacing welding device for the spherical surface of a ball valve, comprising a frame 1, a welding gun travel mechanism 2, a rotary mechanism 3, a workpiece rotating mechanism 4, and an auxiliary mechanism 5; the welding gun travel mechanism 2 is arranged above the frame 1, the rotary mechanism 3 is rotatably arranged at the front upper part of the frame 1, the workpiece rotating mechanism 4 is fixedly installed at one end of the rotary mechanism 3, the auxiliary mechanism 5 is fixedly installed at the other end of the rotary mechanism 3, a bracket 6 is placed on the front of the frame 1, and an operation control box 7 is arranged on the upper part of the bracket 6. The utility model can realize the automation of the welding process of the spherical surface of the ball valve sphere, and ensure the reliable operation of the ball valve and extend its service life by surfacing alloy powder on the spherical surface of the sphere.

[0023] The bottom of the welding gun travel mechanism 2 is provided with a transverse slide 9, which is fixedly mounted on the upper part of a slider slidably connected to the transverse slide rail 10, so as to realize the transverse reciprocating motion of the welding gun travel mechanism on the machine 1. A lifting bracket 11 is fixedly mounted on the upper part of the transverse slide 9, and two sets of lifting slide rails 12 are arranged on one side of the lifting bracket 11. A sliding frame 13 is mounted on the upper end of the lifting bracket 11 through the lifting slide rail 12; the sliding frame 13 can reciprocate up and down on the lifting slide rail 12, and a welding gun front and rear feeding module 14 is slidably arranged inside the sliding frame 13, and the welding gun front and rear feeding module 14 can reciprocate longitudinally on the sliding frame 13. An oscillator (15) is arranged at the front end of the welding gun front and rear feeding module 14, and a gun clamp mounting plate 16 is fixedly mounted on the front end of the oscillator 15, and a welding gun gun clamp 17 is fixedly mounted on the lower part of the gun clamp mounting plate 16, and a welding gun gun clamp 17 is fixedly clamped inside the welding gun gun clamp 17 to hold a welding gun 18. Through the lateral reciprocating motion of the transverse slide plate 9, combined with the sliding frame 13 and the welding gun front and rear feeding module 14, the welding gun 18 can be moved and adjusted in any space within a certain area. The welding gun 18 has the characteristics of good sealing, insulation and centering, stable arcing, smooth powder feeding, high material utilization rate and good protection effect.

[0024] A group of symmetrically distributed accordion protective covers are arranged between the end of the lifting bracket 11 and the end of the sliding bracket 13; a group of symmetrically distributed accordion protective covers are arranged between the rear end of the upper part of the frame 1 and the side of the transverse slide 9. The installation of accordion protective covers not only plays a dust-proof role, but also reduces the close contact between people and machines, reducing safety risks. A vertical drag chain is arranged on the lifting bracket 11, and the end of the vertical drag chain extends to the back of the lifting bracket 11; a longitudinal drag chain is arranged on the front and rear feed module 14 of the welding gun, and the end of the longitudinal drag chain extends to the bottom of the front and rear feed module 14 of the welding gun; a horizontal drag chain is arranged on the frame 1, and the end of the horizontal drag chain extends to the side end of the lifting bracket 1. Placing the cables inside the drag chain can pull and protect the cables, and also make the overall appearance of the equipment more beautiful.

[0025] The head welding assembly 19 of the workpiece rotating mechanism 4 is fixedly mounted on one end of the slewing mechanism 3. A slewing bearing 20 is rotatably mounted on the upper front end of the head welding assembly 19, a gear 23 is rotatably mounted on the lower part of the slewing bearing 20, a turntable 21 is fixedly mounted on the front end of the slewing bearing 20, and a three-jaw chuck 22 is fixedly mounted on the front end of the turntable 21. A spherical welding fixture 8 is arranged on the three-jaw chuck 22. The use of the welding fixture solves the positioning and clamping problems in the workpiece automated welding project, improves the consistency of the weldment, and improves the welding quality and production efficiency of the weldment.

[0026] The auxiliary mechanism 5 is fixedly installed at the other end of the rotary mechanism 3. The auxiliary mechanism 5 is added to solve the concentricity problem of the workpiece during rotation.

[0027] The working principle of the utility model is: first use the welding fixture 8 to position and clamp the workpiece, then use the three-jaw chuck 22 to clamp and fix the spherical welding fixture 8, and use the auxiliary mechanism 5 to center the workpiece; through the operation control box 7 to control the rotary mechanism 3, the workpiece rotation mechanism 4 and the welding gun travel mechanism 2, the welding gun 18 is always in the position where the spherical surface of the sphere needs to be welded to perform welding operations, so as to realize the fully automated cladding of the spherical surface of the sphere. The cladding speed is fast and the production efficiency is high. By cladding alloy powder on the spherical surface of the sphere, the reliable operation of the ball valve is ensured and its service life is extended.

Claims

1. An automated surfacing equipment for the spherical surface of a ball valve, characterized in that: The invention comprises a frame (1), a welding gun travel mechanism (2), a rotating mechanism (3), a workpiece rotating mechanism (4), and an auxiliary mechanism (5); the welding gun travel mechanism (2) is arranged above the frame (1), the rotating mechanism (3) is rotatably arranged at the upper front end of the frame (1), the workpiece rotating mechanism (4) is fixedly mounted on one end of the rotating mechanism (3), and the auxiliary mechanism (5) is fixedly mounted on the other end of the rotating mechanism (3); a bracket (6) is placed on the front of the frame (1), and an operation control box (7) is arranged on the upper part of the bracket (6).

2. The automatic surfacing welding equipment for the spherical surface of a ball valve according to claim 1 is characterized in that: A transverse slide plate (9) is arranged at the bottom of the welding gun walking mechanism (2), and the transverse slide plate (9) is fixedly mounted on the upper part of a slide block which is slidably connected to a transverse slide rail (10).

3. The automatic surfacing welding equipment for the spherical surface of a ball valve according to claim 2 is characterized in that: A lifting bracket (11) is fixedly installed on the upper part of the transverse slide plate (9), two sets of lifting slide rails (12) are arranged on one side of the lifting bracket (11), and a sliding frame (13) is installed on the upper end of the lifting bracket (11) through the lifting slide rail (12); a welding gun front and rear feeding module (14) is slidably arranged inside the sliding frame (13), and an oscillator (15) is arranged at the front end of the welding gun front and rear feeding module (14).

4. The automatic surfacing welding equipment for the spherical surface of a ball valve according to claim 3 is characterized in that: A gun clamp mounting plate (16) is fixedly mounted on the front end of the oscillator (15), a welding gun clamp (17) is fixedly mounted on the lower part of the gun clamp mounting plate (16), and a welding gun (18) is fixedly clamped inside the welding gun clamp (17).

5. The automatic surfacing welding equipment for the spherical surface of a ball valve according to claim 1, characterized in that: The machine head welding assembly (19) of the workpiece rotating mechanism (4) is fixedly mounted on one end of the slewing mechanism (3); a slewing bearing (20) is rotatably mounted on the upper front end of the machine head welding assembly (19); a gear (23) is rotatably mounted on the lower part of the slewing bearing (20); a turntable (21) is fixedly mounted on the front end of the slewing bearing (20); and a three-jaw chuck (22) is fixedly mounted on the front end of the turntable (21).

6. The automatic surfacing welding equipment for the spherical surface of a ball valve according to claim 5, characterized in that: A spherical welding fixture (8) is arranged on the three-jaw chuck (22).

7. The automatic surfacing welding equipment for the spherical surface of a ball valve according to claim 3, characterized in that: A group of accordion protective covers symmetrically distributed up and down are arranged between the end of the lifting bracket (11) and the end of the sliding frame (13); a group of accordion protective covers symmetrically distributed left and right are arranged between the rear end of the upper part of the frame (1) and the side of the transverse sliding plate (9).

8. The automatic surfacing welding equipment for the spherical surface of a ball valve according to claim 3, characterized in that: The lifting bracket (11) is provided with a vertical drag chain, and the end of the vertical drag chain extends to the back of the lifting bracket (11); the welding gun front and rear feed module (14) is provided with a longitudinal drag chain, and the end of the longitudinal drag chain extends to the bottom of the welding gun front and rear feed module (14); the frame (1) is provided with a transverse drag chain, and the end of the transverse drag chain extends to the side end of the frame (1).

9. The automatic surfacing welding equipment for the spherical surface of a ball valve according to claim 1, characterized in that: A powder collection box (24) is placed at the bottom of the front end of the frame (1).

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