Equipment and process for plasma spray welding of metal coating on surface of ball valve

Abstract

The invention discloses equipment and technology for plasma spray welding of a metal coating on the surface of a ball valve, and relates to the technical field of ball valve machining, the equipment comprises a base, two sliding tables, a lifting table, a clamping assembly, a guide rail mechanism, a sliding seat, a first telescopic support, a second telescopic support and a spray gun rod, the two sliding tables are symmetrically arranged on the base in a sliding mode, and the lifting table is arranged on the sliding tables; a clamping assembly is arranged on the lifting table, the guide rail mechanism is fixedly arranged at the center of the base, the sliding base is arranged above the guide rail mechanism in a sliding mode, a first telescopic support is fixedly arranged on the sliding base, a second telescopic support is vertically and fixedly arranged at the output end of the first telescopic support, and the spray gun rod is fixedly installed on the second telescopic support. The guide rail mechanism comprises a fixed table, a sliding block, a hydraulic telescopic rod, a guide block, a sleeve gasket and a connecting block. According to the method, the remodeling time and cost can be greatly reduced, the application range is effectively expanded, and the spray welding efficiency of the ball valve is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of ball valve processing, and specifically to an apparatus and process for plasma spray welding a metal coating on the surface of a ball valve. Background Art

[0002] "Ball valve spray welding" refers to applying a spray welding process to a ball valve and spray welding a layer of high-performance alloy materials (such as nickel-based alloys, cobalt-based alloys, tungsten carbide composite materials, etc.) on the sealing surfaces of the ball and the valve seat to improve its surface hardness, wear resistance, corrosion resistance, and sealing performance. Spray welding is a type of thermal spraying technology, but different from ordinary spraying, spray welding (especially flame spray welding and certain plasma spray welding) can achieve metallurgical bonding or micro-metallurgical bonding, with high coating bonding strength, good compactness, and low porosity.

[0003] Currently, traditional spray welding equipment mainly relies on manual operation by the operator, which results in poor spray welding consistency, easy quality fluctuations, low efficiency, and high labor intensity. Moreover, since a ball valve is a sphere with a three-dimensional spherical surface, the motion mechanism of existing equipment solely uses a turntable plus a linear slide, making it difficult to ensure that the spray gun is always perpendicular to the surface of the spraying point during the movement on the entire spherical surface and difficult to maintain a constant spraying distance. Generally, an arc-shaped track concentric with the ball valve is set, and the equipment is slidably arranged on this track, and then a telescopic rod is used to control the spray welding distance. However, such a fixed track can only spray weld ball valves within a fixed specification range, resulting in high limitations and being unable to adapt to the spray welding work of various specifications of ball valves.

[0004] Therefore, it is necessary to provide an apparatus and process for plasma spray welding a metal coating on the surface of a ball valve to solve the problems raised in the above background art. Summary of the Invention

[0005] To achieve the above object, the present invention provides the following technical solution: An apparatus for plasma spray welding a metal coating on the surface of a ball valve, including a base, a slide table, a lifting table, a clamping assembly, a guide rail mechanism, a slide seat, a first telescopic bracket, a second telescopic bracket, and a spray gun rod. Among them, two slide tables are symmetrically and slidably arranged on the base, a lifting table is arranged on the slide table, a clamping assembly is arranged on the lifting table, the guide rail mechanism is fixedly arranged at the center of the base, the slide seat is slidably arranged above the guide rail mechanism, a first telescopic bracket is fixedly arranged on the slide seat, the output end of the first telescopic bracket is vertically and fixedly provided with a second telescopic bracket, and the spray gun rod is fixedly installed on the second telescopic bracket.

[0006] Preferably, the guide rail mechanism includes a fixed table, a slider, a hydraulic telescopic rod, a guide block, a sleeve pad, and a connecting block. Among them, the fixed table is fixedly arranged on the base, a T-shaped chute is formed on the fixed table, a plurality of T-shaped sliders are slidably arranged in the chute, a hydraulic telescopic rod is fixedly arranged on the slider, and the plurality of hydraulic telescopic rods expand and contract synchronously. The output end of the hydraulic telescopic rod is fixedly provided with a cylindrical guide block, and adjacent two guide blocks are tangent to each other. A sleeve pad is sleeved outside the plurality of guide blocks, and a connecting block is rotatably connected between adjacent two guide blocks.

[0007] Preferably, the slider located at the middlemost position of the chute is fixedly connected to the fixed table, and the hydraulic telescopic rod fixedly connected to the slider is perpendicular to the base.

[0008] Preferably, a support top rod is vertically and fixedly arranged on the hydraulic telescopic rod, and a spherical block is rotatably arranged at the output end of the support top rod;

[0009] An annular groove with an arc-shaped cross-section is formed on the base, and the spherical block is clamped into the annular groove and slidably arranged along the annular groove.

[0010] Preferably, two side plates are fixedly arranged at the bottom of the sliding seat, two driving wheels are rotatably arranged in the sliding seat, and the positions of the two driving wheels are fixed and respectively fit the inner side and the outer side of the sleeve pad. Two groups of adjusting wheels are symmetrically and slidably arranged on the two side plates with the two driving wheels as the symmetry axes, and the two adjusting wheels in the same group are longitudinally arranged and respectively fit the inner side and the outer side of the sleeve pad;

[0011] Both the driving wheel and the adjusting wheel are T-shaped and can be clamped above the sleeve pad and the guide block.

[0012] Preferably, the clamping assembly includes a first support plate, a second support plate, a rotating shaft, a rectangular telescopic support pillar, and a clamping mechanism. Among them, both the first support plate and the second support plate are fixedly arranged on the lifting platform. A turntable is rotatably arranged in the first support plate, a rectangular telescopic support pillar is fixedly arranged on the turntable, a rotating shaft is rotatably arranged in the second support plate, the rotating shaft is fixedly connected to the turntable and is driven by a driving motor, and a clamping mechanism is fixedly arranged at the output end of the rectangular telescopic support pillar.

[0013] Preferably, the clamping mechanism includes a clamping disc, a clamping block, and a screw rod. Among them, three straight grooves are evenly formed in a circular shape on the clamping disc, the clamping block is slidably arranged in the straight groove, a screw rod for driving the clamping block to slide is rotatably arranged in the straight groove, and the screw rod protrudes from the clamping disc and is fixedly provided with a torsion support plate.

[0014] A process for plasma spray welding a metal coating on the surface of a ball valve includes the following steps:

[0015] S1. Adjust the sliding of the sliding table according to the specifications of the ball valve, drive the lifting of the lifting table and the telescoping of the rectangular telescopic struts, adjust the heights of the two clamping mechanisms and the distance between them, so that the two clamping mechanisms can clamp the ball valve, and the clamped ball valve is located at the middle position of the base;

[0016] S2. Drive the telescoping of the plurality of hydraulic telescopic rods according to the specifications of the ball valve and drive the sliding of the plurality of guide blocks, so that the diameter of the guide rail composed of the plurality of guide blocks is adapted to the ball valve to be processed and clamped;

[0017] S2.1. When the plurality of hydraulic telescopic rods telescope, the radius of the guide rail composed of the plurality of guide blocks changes synchronously. Adjacent two guide blocks are rotatably connected by a connecting block, so that the two guide blocks always remain in a tangent state, and the length of the guide rail remains unchanged during the diameter change process;

[0018] S2.2. When the plurality of hydraulic telescopic rods telescope, the plurality of sliders will slide along the chute, and at the same time the angles between the plurality of hydraulic telescopic rods change synchronously, so that the radius of the guide rail and its sector area change linearly under the condition that the total length of the guide rail remains unchanged. At the same time, the gasket can fill the gap between adjacent two guide blocks during the diameter change process, so that the guide rail remains smooth during the diameter change process;

[0019] S3. Drive the first telescopic bracket to telescope according to the height of the clamped ball valve, so that the spray gun rod is perpendicular to the surface of the ball valve, and at the same time drive the second telescopic bracket to telescope, so as to adjust the distance between the spray gun rod and the surface of the ball valve;

[0020] S4. Use the drive motor to drive the rotation of the rotating shaft and drive the rotation of the clamping mechanism, and at the same time use the spray gun rod to spray and weld plasma metal on the surface of the ball valve;

[0021] S5. After spraying and welding a circle on the surface of the ball valve, drive the slide seat to slide along the guide rail mechanism, and then drive the spray gun rod to rotate along the surface of the ball valve;

[0022] S5.1. When the radius of the guide rail composed of the plurality of guide blocks changes, drive the sliding of the two groups of adjusting wheels in the slide seat, so that the two groups of adjusting wheels and the driving wheel always fit on the gasket when the guide rail changes, so that when the slide seat slides, the spray gun rod always maintains a state perpendicular to the surface of the ball valve and the distance between the spray gun rod and the surface of the ball valve remains unchanged.

[0023] Compared with the prior art, the present invention provides a device and process for plasma spray welding a metal coating on the surface of a ball valve, and has the following beneficial effects:

[0024] The present invention sets a variable-diameter guide rail mechanism and an adaptive sliding seat composed of multiple guide blocks and sleeve pads, enabling the guide rail radius to precisely match the curvature of the ball valve. Moreover, during the rotation of the spray gun rod along the surface of the ball valve, the distance from the spray gun rod to the surface of the ball valve always remains constant. As a result, the spray welding is more uniform and of higher quality, effectively solving the problem of uneven coating caused by the change in spherical curvature in traditional spray welding. Additionally, without replacing the guide rail mechanism and the clamping component, it can quickly adapt to ball valves of different diameters, that is, there is no need to replace the tooling, significantly reducing the changeover time and cost, effectively expanding its applicable range, and further improving the spray welding efficiency of the ball valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 is a schematic diagram of the structure of the clamping component in the present invention;

[0027] Figure 3 is a schematic diagram of the structure of the clamping mechanism in the present invention;

[0028] Figure 4 is a schematic diagram of the structure of the guide rail mechanism in the present invention;

[0029] Figure 5 is Figure 4 an enlarged schematic diagram of the structure of part A in;

[0030] Figure 6 is a schematic diagram of the structure of the sliding seat in the present invention;

[0031] Figure 7 is a schematic diagram of the variable-diameter implementation structure of the guide rail mechanism in the present invention;

[0032] In the figure: 1, base; 11, annular groove; 2, sliding table; 3, lifting table; 4, clamping component; 41, first support plate; 42, second support plate; 43, rotating shaft; 44, rectangular telescopic strut; 45, clamping mechanism; 451, clamping disc; 452, clamping block; 453, screw; 46, turntable; 47, driving motor; 5, guide rail mechanism; 51, fixed table; 511, sliding groove; 52, slider; 53, hydraulic telescopic rod; 531, supporting ejector rod; 532, spherical block; 54, guide block; 55, sleeve pad; 56, connecting block; 6, sliding seat; 61, side plate; 62, driving wheel; 63, adjusting wheel; 7, first telescopic bracket; 8, second telescopic bracket; 9, spray gun rod. DETAILED DESCRIPTION OF THE INVENTION

[0033] Please refer to Figures 1 to 7, in the embodiments of the present invention, an apparatus for surface plasma spray welding a metal coating on a ball valve includes a base 1, a sliding table 2, a lifting table 3, a clamping assembly 4, a guide rail mechanism 5, a sliding seat 6, a first telescopic bracket 7, a second telescopic bracket 8, and a spray gun rod 9. Among them, two sliding tables 2 are symmetrically and slidably arranged on the base 1, a lifting table 3 is arranged on the sliding table 2, a clamping assembly 4 is arranged on the lifting table 3, the guide rail mechanism 5 is fixedly arranged at the center of the base 1, the sliding seat 6 is slidably arranged above the guide rail mechanism 5, a first telescopic bracket 7 is fixedly arranged on the sliding seat 6, a second telescopic bracket 8 is vertically and fixedly arranged at the output end of the first telescopic bracket 7, and the spray gun rod 9 is fixedly installed on the second telescopic bracket 8;

[0034] In addition, there are various driving methods for the sliding table 2 to slide along the base 1, such as a hydraulic driving mechanism, a gear and rack mechanism, and a worm and worm gear;

[0035] The guide rail mechanism 5 includes a fixed table 51, a slider 52, a hydraulic telescopic rod 53, a guide block 54, a sleeve gasket 55, and a connecting block 56. Among them, the fixed table 51 is fixedly arranged on the base 1, a T-shaped chute 511 is opened on the fixed table 51, a plurality of T-shaped sliders 52 are slidably arranged in the chute 511, a hydraulic telescopic rod 53 is fixedly arranged on the slider 52, and the plurality of hydraulic telescopic rods 53 expand and contract synchronously. The output end of the hydraulic telescopic rod 53 is fixedly arranged with a cylindrical guide block 54, and adjacent two guide blocks 54 are tangent to each other. A sleeve gasket 55 is sleeved outside the plurality of guide blocks 54, and a connecting block 56 is rotatably connected between adjacent two guide blocks 54;

[0036] It should be noted that the sleeve gasket 55 is made of a hard material with elasticity, that is, when the radius of the guide rail changes, the sleeve gasket 55 can fill the gap between adjacent two guide blocks 54, and at the same time can undergo elastic deformation and maintain a certain hardness, so as to ensure that the guide rail can remain smooth when the radius changes. Since the adjacent two guide blocks 54 always remain tangent to each other when the radius of the guide rail changes, the change in the gap between adjacent two guide blocks 54 is small, and thus the deformation amount of the sleeve gasket 55 is small, so as to ensure that the guide rail remains smooth on the premise of meeting the variable diameter adjustment;

[0037] Two side plates 61 are fixedly arranged at the bottom of the sliding seat 6. Two driving wheels 62 are rotatably arranged in the sliding seat 6, and the positions of the two driving wheels 62 are fixed and respectively fit the inner side and the outer side of the sleeve gasket 55. Two groups of adjusting wheels 63 are symmetrically and slidably arranged on the two side plates 61 with the two driving wheels 62 as the symmetry axis. The two adjusting wheels 63 in the same group of adjusting wheels 63 are arranged longitudinally and respectively fit the inner side and the outer side of the sleeve gasket 55;

[0038] In addition, there are many ways to drive the driving wheel 62, for example, two mutually meshing gears are embedded in the slide 6, the two gears are connected to the two driving wheels 62, and a motor is used to drive one of the gears to rotate, and the two gears rotate to drive the two driving wheels 62 to rotate, so as to achieve the sliding of the slide 6 along the guide rail, or the two driving wheels 62 are connected to each other by a pulley, and then one of the pulleys is driven to rotate by a motor;

[0039] The driving wheel 62 and the adjusting wheel 63 are both T-shaped and can be clamped on the sleeve 55 and the guide block 54;

[0040] For ease of understanding, the two adjusting wheels 63 and one of the driving wheels 62 in the two groups of adjusting wheels 63 located on the same side of the guide rail can be regarded as three points on the arc, and the two groups of adjusting wheels 63 are symmetrically arranged along the driving wheels 62, that is, a straight line is drawn between the two adjusting wheels 63, and the straight line is parallel to the tangent of the arc at the driving wheels 62, then the driving wheels 62 are fixed in position, and the two driving wheels 62 are facing the center of the guide rail, so when the radius of the guide rail changes, the two groups of adjusting wheels 63 are driven to extend and retract at the same time so that they always fit the guide rail, so that the two driving wheels 62 can always face the center of the guide rail, that is, the slide seat 6 rotates in a circle with the center of the guide rail as the center point during the sliding process along the guide rail, so that the spray gun rod 9 is always perpendicular to the spraying point during the rotation process along the surface of the ball valve;

[0041] The clamping assembly 4 includes a support plate 1 41, a support plate 2 42, a rotating shaft 43, a rectangular telescopic support 44 and a clamping mechanism 45, wherein the support plate 1 41 and the support plate 2 42 are both fixedly arranged on the lifting platform 3, a turntable 46 is rotatably arranged in the support plate 1 41, a rectangular telescopic support 44 is fixedly arranged on the turntable 46, a rotating shaft 43 is rotatably arranged in the support plate 2 42, the rotating shaft 43 is fixedly connected to the turntable 46 and driven by a driving motor 47, and a clamping mechanism 45 is fixedly arranged at the output end of the rectangular telescopic support 44;

[0042] The clamping mechanism 45 includes a clamping plate 451, a clamping block 452 and a screw 453, wherein the clamping plate 451 is provided with three straight grooves evenly distributed in a circumference, a clamping block 452 is slidably arranged in the straight groove, a screw 453 is rotatably arranged in the straight groove for driving the clamping block 452 to slide, and the screw 453 protrudes from the clamping plate 451 and is fixedly provided with a torsion support plate.

[0043] During implementation, the ball valve is clamped using the clamping assembly 4. Subsequently, the driving motor 47 is used to drive the clamping mechanism 45 to rotate, thereby driving the ball valve to rotate. At the same time, the spray gun rod 9 is used to spray-weld the ball valve. During the spray-welding process, the slide base 6 is driven to slide along the variable-diameter guide rail mechanism 5, thereby driving the spray gun rod 9 to slide along the surface of the ball valve. During the sliding process, the spray gun rod 9 is always perpendicular to the surface of the spraying point, and the distance between the spray gun rod 9 and the surface of the ball valve remains unchanged. This makes the spraying more uniform and the spraying quality higher. When the clamping assembly 4 clamps the ball valve, the slide table 2 can be driven to slide according to the specifications of the ball valve, and at the same time, the lifting table 3 is driven to lift, so that the clamping assembly 4 changes in both height and horizontal positions, thereby clamping ball valves of different specifications and ensuring that the ball valve is always at the center position of the base 1 after being clamped. While adjusting the position of the clamping assembly 4, multiple hydraulic expansion rods 53 are driven to synchronously expand and contract, so that the radius of the guide rail composed of multiple guide blocks 54 changes. During this process, since adjacent two guide blocks 54 are rotationally connected by a connecting block 56, when the hydraulic expansion rod 53 drives the guide block 54 to slide, the slider 52 will slide in the chute 511, and at the same time, the angle between adjacent two hydraulic expansion rods 53 will change, and the total length of the guide rail composed of multiple guide blocks 54 will not change. In this way, the variable-diameter adjustment of the guide rail mechanism 5 is realized, so that the radius of the guide rail is adapted to the processing of the ball valve. At the same time, when the radius of the guide rail changes, two groups of adjusting wheels 63 in the slide base 6 can be driven to slide, so that the two groups of adjusting wheels 63 always fit on the outside of the gasket 55 regardless of how the radius of the guide rail changes, that is, regardless of how the radius of the guide rail changes, the slide base 6 can always slide along the guide rail. Subsequently, two driving wheels 62 are driven to rotate, so that the driving wheels 62 rotate along the surface of the gasket 55, thereby driving the slide base 6 to slide along the guide rail, and further driving the spray gun rod 9 to slide along the surface of the ball valve, so as to realize the spray-welding work of ball valves of various different specifications, and the spray-welding efficiency is higher and the quality is better.

[0044] For easy understanding, the guide rail composed of multiple guide blocks 54 can be regarded as an arc. Then, when the length of this arc remains unchanged, the arc radius is inversely proportional to the central angle, and correspondingly, the arc radius is directly proportional to the sector area. At this time, the expansion and contraction of multiple hydraulic expansion rods 53 can be regarded as the change of this arc radius. Since adjacent two guide blocks 54 are rotationally connected by a connecting block 56, the total length of the guide rail will not change, that is, the arc length remains unchanged. That is to say, the expansion and contraction of the hydraulic expansion rod 53 and the guide rail composed of guide blocks 54 show a linear change, so as to realize the variable diameter of the guide rail and thus adapt to the spray-welding work of ball valves of various specifications.

[0045] In this embodiment, as Figure 1 、 Figure 4 and Figure 5, the slider 52 located at the very middle position of the sliding groove 511 is fixedly connected to the fixed table 51, and the hydraulic telescopic rod 53 fixedly connected to the slider 52 is vertically arranged with respect to the base 1;

[0046] A support top rod 531 is vertically and fixedly arranged on the hydraulic telescopic rod 53, and a spherical block 532 is rotatably arranged at the output end of the support top rod 531;

[0047] An annular groove 11 with an arc-shaped cross-section is formed on the base 1, and the spherical block 532 is snapped into the annular groove 11 and is slidably arranged along the annular groove 11.

[0048] Specifically, setting the support top rod 531 can ensure that during the process of the slider 52 sliding in the sliding groove 511 and driving the hydraulic telescopic rod 53 to rotate along the fixed table 51, the hydraulic telescopic rod 53 can remain stable, that is, the guide rail composed of multiple guide blocks 54 remains stable during the change, and at the same time, the slider 52 located at the very middle position of the sliding groove 511 is fixed, so that when the radius of the guide rail changes, the sliding of multiple sliders 52 and the rotation of the hydraulic telescopic rod 53 change symmetrically with respect to the middle slider 52 as the axis of symmetry. The initial position of its slide seat 6 is located at the middle position of the guide rail, that is, the placement position of the spray gun rod 9 is perpendicular to the center point of the ball valve and perpendicular to the base 1, thereby facilitating the adjustment of the initial position of the spray gun rod 9 and the initial radius of the guide rail according to the specifications of the ball valve and the spray welding requirements.

[0049] A process for plasma spray welding a metal coating on the surface of a ball valve includes the following steps:

[0050] S1. Adjust the sliding of the sliding table 2, drive the lifting of the lifting table 3 and the telescoping of the rectangular telescopic strut 44 according to the specifications of the ball valve, and adjust the height of the two clamping mechanisms 45 and the distance between the two, so that the two clamping mechanisms 45 can clamp the ball valve, and the clamped ball valve is located at the middle position of the base 1;

[0051] S2. Drive the telescoping of multiple hydraulic telescopic rods 53 and drive the sliding of multiple guide blocks 54 according to the specifications of the ball valve, so that the diameter of the guide rail composed of multiple guide blocks 54 is adapted to the processed and clamped ball valve;

[0052] S2.1. When multiple hydraulic telescopic rods 53 are telescoping, the radius of the guide rail composed of multiple guide blocks 54 changes synchronously. Adjacent two guide blocks 54 are rotatably connected by a connecting block 56, so that the two guide blocks 54 always remain in a tangent state, so that the length of the guide rail remains unchanged during the diameter change process;

[0053] S2.2. When multiple hydraulic telescopic rods 53 expand and contract, multiple sliders 52 will slide along the chute 511. At the same time, the angles between multiple hydraulic telescopic rods 53 change synchronously, so that when the total length of the guide rail remains unchanged, its radius and its sector area change linearly. At the same time, the gasket 55 can fill the gap between adjacent two guide blocks 54 during the diameter change process, so that the guide rail remains smooth during the diameter change process;

[0054] S3. Drive the first telescopic bracket 7 to expand and contract according to the height of the ball valve clamping, so that the spray gun rod 9 is perpendicular to the surface of the ball valve. At the same time, drive the second telescopic bracket 8 to expand and contract to adjust the distance between the spray gun rod 9 and the surface of the ball valve;

[0055] That is to say, after the ball valve is clamped and the radius of the guide rail mechanism 5 is adjusted, the center point of the ball valve coincides with the center of the guide rail mechanism 5 in the vertical direction, and the position of the spray gun rod 9 coincides with the position of the center point of the ball valve in the horizontal direction. That is, when the driving motor 47 drives the clamping mechanism 45 and the ball valve to rotate, it can be regarded as the spray gun rod 9 rotating along the surface of the ball valve for spray welding of the ball valve. And when the sliding seat 6 slides to drive the spray gun rod 9 to rotate, it can be regarded as the change in the position of the spray gun rod 9 on the surface of the ball valve, and the distance between the spray gun rod 9 and the surface of the ball valve remains unchanged during this change process;

[0056] S4. Use the driving motor 47 to drive the rotating shaft 43 to rotate and drive the clamping mechanism 45 to rotate. At the same time, use the spray gun rod 9 to spray weld plasma metal on the surface of the ball valve;

[0057] S5. After spraying a circle on the surface of the ball valve, drive the sliding seat 6 to slide along the guide rail mechanism 5, thereby driving the spray gun rod 9 to rotate along the surface of the ball valve;

[0058] S5.1. When the radius of the guide rail composed of multiple guide blocks 54 changes, drive two groups of adjusting wheels 63 in the sliding seat 6 to slide, so that the two groups of adjusting wheels 63 and the driving wheel 62 always fit on the gasket 55 when the guide rail changes, so that when the sliding seat 6 slides, the spray gun rod 9 always maintains a state perpendicular to the surface of the ball valve, and the distance between the spray gun rod 9 and the surface of the ball valve remains unchanged.

[0059] The above-mentioned are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. An equipment for surface plasma spray welding of a metal coating on a ball valve, characterized in that, It includes a base (1), a sliding table (2), a lifting table (3), a clamping assembly (4), a guide rail mechanism (5), a sliding seat (6), a first telescopic bracket (7), a second telescopic bracket (8), and a spray gun rod (9). Among them, two sliding tables (2) are symmetrically and slidably arranged on the base (1), a lifting table (3) is arranged on the sliding table (2), a clamping assembly (4) is arranged on the lifting table (3), the guide rail mechanism (5) is fixedly arranged at the center of the base (1), the sliding seat (6) is slidably arranged above the guide rail mechanism (5), a first telescopic bracket (7) is fixedly arranged on the sliding seat (6), a second telescopic bracket (8) is vertically and fixedly arranged at the output end of the first telescopic bracket (7), and the spray gun rod (9) is fixedly installed on the second telescopic bracket (8).

2. The device for surface plasma spray welding of a metal coating on a ball valve according to claim 1, characterized in that, The guide rail mechanism (5) includes a fixed table (51), a slider (52), a hydraulic telescopic rod (53), a guide block (54), a sleeve pad (55), and a connecting block (56). Among them, the fixed table (51) is fixedly arranged on the base (1), a T-shaped chute (511) is opened on the fixed table (51), a plurality of T-shaped sliders (52) are slidably arranged in the chute (511), a hydraulic telescopic rod (53) is fixedly arranged on the slider (52), and the plurality of hydraulic telescopic rods (53) expand and contract synchronously. The output end of the hydraulic telescopic rod (53) is fixedly arranged with a cylindrical guide block (54), and adjacent two of the guide blocks (54) are tangent to each other. A sleeve pad (55) is sleeved outside the plurality of guide blocks (54), and a connecting block (56) is rotatably connected between adjacent two of the guide blocks (54).

3. The equipment for surface plasma spray welding of a metal coating on a ball valve according to claim 2, characterized in that, The slider (52) located at the middlemost position of the chute (511) is fixedly connected to the fixed table (51), and the hydraulic telescopic rod (53) fixedly connected to the slider (52) is vertically arranged with the base (1).

4. The device for surface plasma spray welding of a metal coating on a ball valve according to claim 3, characterized in that, A support top rod (531) is vertically and fixedly arranged on the hydraulic telescopic rod (53), and a spherical block (532) is rotatably arranged at the output end of the support top rod (531); An annular groove (11) with an arc-shaped cross-section is opened on the base (1), and the spherical block (532) is snapped into the annular groove (11) and slidably arranged along the annular groove (11).

5. The device for surface plasma spray welding of a metal coating on a ball valve according to claim 2, characterized in that, Two side plates (61) are fixedly arranged at the bottom of the sliding seat (6), two driving wheels (62) are rotatably arranged in the sliding seat (6), and the positions of the two driving wheels (62) are fixed and respectively fit the inner side and the outer side of the sleeve pad (55). Two groups of adjusting wheels (63) are symmetrically and slidably arranged on the two side plates (61) with the two driving wheels (62) as the symmetry axis, and the two adjusting wheels (63) in the same group of adjusting wheels (63) are longitudinally arranged and respectively fit the inner side and the outer side of the sleeve pad (55); Both the driving wheel (62) and the adjusting wheel (63) are T-shaped and can be stuck above the sleeve pad (55) and the guide block (54).

6. The device for surface plasma spray welding of a metal coating on a ball valve according to claim 5, characterized in that, The clamping assembly (4) includes a first support plate (41), a second support plate (42), a rotating shaft (43), a rectangular telescopic support column (44), and a clamping mechanism (45). Among them, the first support plate (41) and the second support plate (42) are both fixedly arranged on the lifting platform (3). A turntable (46) is rotatably arranged in the first support plate (41). A rectangular telescopic support column (44) is fixedly arranged on the turntable (46). A rotating shaft (43) is rotatably arranged in the second support plate (42). The rotating shaft (43) is fixedly connected to the turntable (46) and is driven by a driving motor (47). The output end of the rectangular telescopic support column (44) is fixedly provided with a clamping mechanism (45).

7. The device for surface plasma spray welding of a metal coating on a ball valve according to claim 6, characterized in that, The clamping mechanism (45) includes a clamping disc (451), clamping blocks (452), and a screw rod (453). Among them, three straight grooves are evenly arranged in a circle on the clamping disc (451). The clamping blocks (452) are slidably arranged in the straight grooves. A screw rod (453) for driving the clamping blocks (452) to slide is rotatably arranged in the straight grooves. The screw rod (453) protrudes from the clamping disc (451) and is fixedly provided with a torsion support plate.

8. A surface plasma spray welding metal coating process for a ball valve, which uses the equipment for surface plasma spray welding a metal coating on a ball valve as described in claim 6, characterized in that, It includes the following steps: S1. Adjust the sliding of the sliding table (2) according to the specifications of the ball valve, drive the lifting of the lifting platform (3) and the telescoping of the rectangular telescopic support column (44), and adjust the height of the two clamping mechanisms (45) and the distance between the two, so that the two clamping mechanisms (45) can clamp the ball valve, and the clamped ball valve is located at the middle position of the base (1); S2. Drive the telescoping of the multiple hydraulic telescopic rods (53) according to the specifications of the ball valve and drive the sliding of the multiple guide blocks (54), so that the diameter of the guide rail composed of the multiple guide blocks (54) is adapted to the ball valve to be processed and clamped; S2.

1. When the multiple hydraulic telescopic rods (53) telescope, the radius of the guide rail composed of the multiple guide blocks (54) changes synchronously. Adjacent two guide blocks (54) are rotatably connected by a connecting block (56), so that a tangent state is always maintained between the two guide blocks (54), and the length of the guide rail remains unchanged during the diameter change process; S2.

2. When the multiple hydraulic telescopic rods (53) telescope, the multiple sliders (52) will slide along the chute (511). At the same time, the angles between the multiple hydraulic telescopic rods (53) change synchronously, so that when the total length of the guide rail remains unchanged, its radius and its sector area change linearly. At the same time, the gasket (55) can fill the gap between adjacent two guide blocks (54) during the diameter change process, so that the guide rail remains smooth during the diameter change process; S3. Drive the telescoping of the first telescopic support (7) according to the height of the clamped ball valve, so that the spray gun rod (9) is perpendicular to the surface of the ball valve. At the same time, drive the telescoping of the second telescopic support (8) to adjust the distance between the spray gun rod (9) and the surface of the ball valve; S4. Drive the rotation of the rotating shaft (43) by using the drive motor (47) to drive the rotation of the clamping mechanism (45), and at the same time, spray-weld the plasma metal on the surface of the ball valve by using the spray gun rod (9); S5. After spraying and welding a circle on the surface of the ball valve, drive the sliding seat (6) to slide along the guide rail mechanism (5), so as to drive the spray gun rod (9) to rotate along the surface of the ball valve; S5.

1. When the radius of the guide rail composed of a plurality of the guide blocks (54) changes, drive the sliding of the two sets of adjusting wheels (63) in the sliding seat (6), so that the two sets of the adjusting wheels (63) are always in contact with the sleeve pad (55) when the guide rail changes, so that when the sliding seat (6) slides, the spray gun rod (9) always maintains a state perpendicular to the surface of the ball valve, and the distance between the spray gun rod (9) and the surface of the ball valve remains unchanged.

Images