Spraying device and process for wear-resistant coating of ball body of titanium ball valve

Abstract

The invention discloses a spraying device and process for a titanium ball valve ball body wear-resistant coating, and relates to the field of ball body surface spraying, the spraying device comprises a machine body, a first rotating arm, a second rotating arm, an inner supporting assembly, a supporting wheel, a centering assembly and a plasma spray gun, the first rotating arm is rotationally arranged on the machine body, and the second rotating arm is arranged on the machine body in a sliding mode; when the second rotating arm slides towards the direction of the first rotating arm, the second rotating arm and the first rotating arm are connected in an inserted mode to form coaxial rotating fit, the first rotating arm and the second rotating arm are both provided with the inner supporting assemblies, the first rotating arm and the second rotating arm are both provided with the supporting wheels, and the supporting wheels are arranged on the two rotating arms in a sliding mode. The supporting wheel supports the inner wall of the ball and is in sliding fit with the ball. The centering assembly comprises two centering plates which are arranged in a synchronous sliding mode, and pre-supporting parts are arranged on the centering plates. The spraying gun can be prevented from empty spraying, and waste is reduced.

Description

TECHNICAL FIELD

[0001] The application relates to the field of spraying of a spherical surface, in particular to a spraying device and process for a wear-resistant coating of a titanium ball valve spherical body. BACKGROUND

[0002] In order to ensure that the valve can still maintain good wear resistance, erosion resistance and sealing performance under high-speed fluid scouring and solid particle impact, a hard alloy with sufficient hardness needs to be used for wear-resistant ball valve wear-resistant coating and surface treatment.

[0003] When the ball valve is in use, the impact on the spherical body is the most, so the spherical surface needs to be sprayed to enable the spherical surface to have wear resistance and corrosion resistance. The spherical structure is shown in Figure 1 The body 90 is provided with a through hole 100.

[0004] The existing spraying device for the spherical body can refer to the Chinese patent with the publication number CN118835191B. The spraying gun sprays the spherical body through the rotation of the main shaft spherical body. However, as shown in the accompanying drawings, the through hole of the spherical body will pass through the spraying area during the rotation of the spherical body, that is, the spraying gun will spray the through hole, which will cause waste. SUMMARY

[0005] In order to avoid the above phenomenon and reduce waste, the application provides a spraying device and process for a wear-resistant coating of a titanium ball valve spherical body.

[0006] The spraying device and process for a wear-resistant coating of a titanium ball valve spherical body provided by the application adopt the following technical scheme: A spraying device for a wear-resistant coating of a titanium ball valve spherical body, comprising a machine body, a first rotating arm, a second rotating arm, an inner support assembly, a support wheel, a centering assembly and a plasma spray gun, the first rotating arm is rotatably arranged on the machine body, the second rotating arm is slidably arranged on the machine body, and when the second rotating arm slides towards the first rotating arm, the second rotating arm is coaxially rotatably connected with the first rotating arm through insertion, the first rotating arm and the second rotating arm are both provided with the inner support assembly, the first rotating arm and the second rotating arm are both provided with the support wheel, the support wheel is slidably arranged on the two rotating arms, and the support wheel supports the inner wall of the spherical body and forms a sliding fit with the spherical body; the centering assembly comprises two centering plates which are synchronously slidably arranged, and the centering plates are provided with pre-supporting portions.

[0007] By adopting the technical scheme, the spherical body is hoisted to the first rotating arm, the through hole of the spherical body is sleeved on the first rotating arm, the second rotating arm slides and is inserted with the first rotating arm to form coaxial rotating cooperation, then the supporting wheel slides and abuts against the inner wall of the spherical body and forms sliding cooperation, at this time, the spherical body can slide in the length direction of the rotating arm, then the two pairs of centering plates slide synchronously towards each other, in this process, the centering plates make the spherical body slide and adjust the position, so that the spherical center of the spherical body moves to a specified position, and at this time, the pre-supporting part supports the bottom of the spherical body, then the supporting wheel is separated from the inner wall of the spherical body, the inner supporting assembly supports and abuts against the inner wall of the spherical body and generates friction, then the centering plates are separated, the first rotating arm drives the second rotating arm to rotate synchronously, and then drives the spherical body to rotate, and the plasma torch performs the spraying operation on the surface of the spherical body; the inner supporting assembly supports the inner wall of the through hole of the spherical body, the surface of the spherical body is always located in the spraying area during the rotation of the spherical body, and there is no empty spraying phenomenon, thereby reducing the waste of sprayed powder; and the centering assembly is used for centering and positioning the spherical body, so that the spraying track of the plasma torch does not correspond to the surface track of the spherical body due to the position deviation, thereby affecting the spraying effect.

[0008] Preferably, the inner supporting assembly comprises a supporting plate and a first cylinder driving the supporting plate to slide, the supporting plate is provided at least in two, the number of the first cylinders is the same as that of the supporting plates and corresponds to the supporting plates one by one, the first rotating arm and the second rotating arm are formed with mounting parts on the sides close to each other, the first cylinders are mounted at the mounting parts, and the supporting plates are fixedly mounted at the end portions of the piston rods of the first cylinders.

[0009] By adopting the technical scheme, the first driving operation drives the supporting plate to move, so that the supporting plate abuts against the inner wall of the through hole and realizes synchronous rotation of the two.

[0010] Preferably, a second cylinder is further mounted on the mounting part, at least two second cylinders are provided on the same mounting part, an installation plate is arranged at the end portion of the piston rod of the second cylinder, and the supporting wheel is mounted on the installation plate.

[0011] By adopting the technical scheme, the second cylinder is operated to drive the installation plate to slide, so that the supporting wheel can contact the inner wall of the through hole and form rolling cooperation with the inner wall of the through hole, that is, the spherical body can slide on the supporting wheel.

[0012] Preferably, an arc-shaped plate is arranged on the machine body, a mounting seat is slidably arranged on the arc-shaped plate, the plasma torch is arranged on the mounting seat, the center of curvature of the arc-shaped plate is concentric with the spherical center of the spherical body, an arc-shaped rack is arranged on the arc-shaped plate, a linkage gear is rotatably connected to the mounting seat, the linkage gear is engaged with the arc-shaped rack, and a driving motor driving the linkage gear to rotate is arranged on the mounting seat.

[0013] By adopting the technical scheme, when the spraying operation is performed, the driving motor drives the linkage gear to rotate slowly through the reduction box, the linkage gear walks on the arc-shaped rack, the mounting seat slides on the arc-shaped plate, the plasma torch slides, the plasma torch moves, and the spraying operation on the whole sphere is realized.

[0014] Preferably, a bidirectional screw rod is arranged on the machine body and rotates, and the two centering plates are threadedly connected to two threaded portions of the bidirectional screw rod.

[0015] By adopting the technical scheme, the motor drives the bidirectional screw rod to rotate, and the two centering plates move synchronously, and when the two centering plates move towards each other, the sphere is centered, the sphere center moves to a concentric position of the curvature center of the arc-shaped plate, the pre-supporting portion pre-supports the sphere, the shape of the pre-supporting portion is matched with the outer wall of the sphere, and the stability of the supporting can be improved.

[0016] Preferably, an insertion slot is arranged at the end of the first rotating arm, and a square-shaped insertion block is arranged at the end of the second rotating arm, and the insertion block is inserted into the insertion slot.

[0017] By adopting the technical scheme, the insertion block and the insertion slot are inserted into each other, and the coaxial rotation of the two is realized.

[0018] Preferably, a plurality of accommodating grooves are arranged on the support plate, a friction plate is hingedly connected to the support plate in each accommodating groove, a support spring is arranged in the accommodating groove, one end of the support spring is connected to the inner wall of the accommodating groove, and the other end of the support spring is connected to the friction plate. In the initial state, the friction plate is arranged in an inclined manner, and when the support plate abuts against the inner wall of the through hole, the friction plate is lapped at the groove opening of the accommodating groove.

[0019] By adopting the technical scheme, in the initial state, the friction plate is arranged in an inclined manner, and the inclination direction of the friction plate is consistent with the rotation direction of the support plate. When the friction plate abuts against the inner wall of the through hole, the friction plate abuts at the groove opening of the accommodating groove, and the friction plate cannot rotate, and the two are synchronously rotated. Due to the friction and the support spring, the friction plate always has a rotation trend, that is, a trend of rotating away from the rotation direction of the support plate, that is, a trend of gradually rotating from the inclined state to the vertical state. During the process of rotating the friction plate from the inclined state to the vertical state, the straight-line distance between the end of the friction plate and the groove opening of the accommodating groove gradually increases. If the two are relatively rotated, the end of the friction plate will have a trend of moving close to the inner wall of the through hole, thereby compensating the abutting force of the inner wall of the through hole. That is, by means of the friction plate, the synchronous rotation of the two can be ensured. Even if there is relative rotation, the friction plate will immediately abut again due to the action of the friction plate, the continuity of the rotation of the sphere is ensured, the rotation of the sphere is prevented from stopping or being interrupted, and the uniformity of the spraying is affected.

[0020] Preferably, the support wheel is internally hollow and filled with lubricating oil, the mounting plate is symmetrically provided with support plates, a connecting shaft is fixedly connected between the two support plates, and the support wheel is rotatably connected to the connecting shaft; the surface of the support wheel is provided with an oil outlet at intervals, the oil outlet is trapezoidal, and the support wheel is slidably provided with a blocking block at the oil outlet.

[0021] By adopting the above technical scheme, in the process of positioning the ball, the ball slides relative to the support wheel, the support wheel rotates, and when the blocking block moves to the inner wall of the ball, the blocking block slides inward to form a pressing force on the lubricating oil in the support wheel. At this time, the lubricating oil in the support wheel is extruded and flows out of the oil outlet, lubricating the contact between the support wheel and the ball, thereby helping to improve the smoothness of the ball during centering movement.

[0022] Preferably, the blocking block protrudes from the surface of the support wheel, the support wheel is provided with a rubber diaphragm at the inner end of the oil outlet, the lower end of the blocking block is fixedly connected to the rubber diaphragm, the lower side of the blocking block is provided with an oil inlet, and the outer end wall of the blocking block is provided with an oil outlet that communicates with the oil inlet.

[0023] By adopting the above technical scheme, in the process of rotating the support wheel, when the blocking block contacts the inner wall of the ball, the blocking block is compressed and the rubber diaphragm is deformed. At this time, the lubricating oil in the support wheel receives a pressing force and enters the oil inlet of the blocking block. When the blocking block is separated from the inside of the ball, the blocking block is reset under the action of the rubber diaphragm. In the process of rotating the support wheel, the lubricating oil in the oil inlet gradually flows out of the oil outlet, achieving lubrication.

[0024] A spraying process for a titanium ball valve ball wear-resistant coating, using the above spraying device, comprising the following steps: S1: hoist the ball to be processed, and make the through hole of the ball fit around the first rotating arm; S2: slide the second rotating arm and gradually form coaxial rotating cooperation with the first rotating arm by inserting; S3: the inner support assembly on the first rotating arm and the second rotating arm abuts against the inner wall of the through hole of the ball to support and fix the ball; S4: drive the first rotating arm to rotate, synchronously drive the second rotating arm to rotate, realize the rotation of the ball, and slowly move the plasma spray gun along the arc of the ball to spray the periphery of the ball. The spraying powder uses rutile-structured nano-titanium oxide powder as the basic component, adds 5%-45% volume fraction of hard phase, and prepares the powder of the component into a spraying granularity of 15-45μm; S5: cooling; S6: disassemble the ball for quality inspection; In the S2 step, when the second rotating arm is inserted with the first rotating arm, the supporting wheels on the first rotating arm and the second rotating arm abut against the inner wall of the ball hole and form a sliding fit, then the oppositely arranged centering plates slide towards each other to center the ball and pre-support the ball, and then the S3 step is performed.

[0025] In summary, the present application has at least one of the following beneficial technical effects: 1. The inner support assembly is used to support and fix the ball hole, so that the outer surface of the ball can be completely sprayed when the ball rotates, and there is no empty spraying phenomenon. By adjusting the position of the ball through the centering plate, the center of the ball can be concentric with the center of curvature of the arc-shaped moving track of the plasma torch, preventing deviation between the spraying range and the ball. 2. After the second rotating arm is inserted with the first rotating arm, the supporting wheels first support the inner wall of the ball, at which time the ball can slide along the length direction of the rotating arm, and the centering of the ball is realized through the synchronous movement of the centering plate. When the centering is finished, the pre-supporting part supports the ball, at which time the supporting wheels can be separated from the inner wall of the ball, and then the supporting plate moves to tightly support the inner wall of the ball, realizing clamping of the ball. 3. By arranging the friction plate on the supporting plate, the friction plate always has a tendency to rotate when driving the ball to rotate. If relative rotation occurs, the friction plate will have a small displacement, and the end of the friction plate will move towards the inner wall of the hole, thereby compensating the friction force and quickly realizing the tightness of the friction plate and the inner wall of the hole, preventing the ball from stopping or stalling. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the ball; Figure 2 It is a schematic diagram of the overall structure of the embodiment one of the spraying device of the present application; Figure 3 It is a schematic diagram of part of the structure of the embodiment one of the spraying device of the present application, mainly embodying the structure of the inner support assembly; Figure 4 It is a schematic diagram of part of the structure of the embodiment one of the spraying device of the present application, mainly embodying the structure of the arc-shaped plate; Figure 5 It is a schematic diagram of the cross-sectional structure of the supporting plate in the embodiment two of the spraying device of the present application; Figure 6 It is a schematic diagram of the structure of the mounting plate and the supporting wheel in the embodiment three of the spraying device of the present application; Figure 7 It is a schematic diagram of the cross-sectional structure of the supporting wheel in the embodiment three of the spraying device of the present application; Figure 8 It is a schematic diagram of the cross-sectional structure of the supporting wheel in the embodiment four of the spraying device of the present application; Figure 9 This is a cross-sectional view of the clogging block in Embodiment 4 of the spraying device of this application.

[0027] Reference numerals: 1. Body; 11. Plasma spray gun; 12. Bidirectional lead screw; 2. First rotating arm; 21. Insertion slot; 3. Second rotating arm; 31. Insertion block; 4. Internal support assembly; 41. Support plate; 411. Friction pad; 412. Receiving groove; 413. Rotating shaft; 414. Friction plate; 415. Support spring; 42. First cylinder; 5. Support wheel; 51. Oil outlet; 52. Blocking block; 521. Connecting rod; 522. Abutment wheel; 523. Limiting plate; 524. Abutment spring 6. Centering assembly; 61. Centering plate; 611. Pre-support part; 7. Support seat; 8. Mounting part; 9. Second cylinder; 91. Mounting plate; 911. Support plate; 912. Connecting shaft; 20. Arc plate; 201. Sliding groove; 202. Arc rack; 30. Mounting seat; 301. Linkage gear; 302. Drive motor; 40. Linkage wheel; 401. Recessed part; 50. Rubber diaphragm; 60. Oil inlet; 70. Oil outlet; 80. Oil delivery channel; 90. Body; 100. Through hole. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 2 -Appendix Figure 9 This application will be described in further detail.

[0029] This application discloses a spraying device for a wear-resistant coating on a titanium ball valve ball.

[0030] Example 1 Reference Figure 2 The spraying device for the wear-resistant coating of the titanium ball valve ball includes a body 1, a first rotating arm 2, a second rotating arm 3, an inner support assembly 4, a support wheel 5, a centering assembly 6, and a plasma spray gun 11. The first rotating arm 2 is rotatably mounted on the body 1 and is driven to rotate by the spindle box. A support seat 7 is slidably connected to the body 1 and is driven to slide by a screw drive. The second rotating arm 3 is rotatably connected to the support seat 7. When the support seat 7 slides towards the first rotating arm 2, the second rotating arm 3 and the first rotating arm 2 are inserted into each other and rotate coaxially. Both the first rotating arm 2 and the second rotating arm 3 are provided with an inner support assembly 4, which supports the inner wall of the ball and rotates synchronously with the ball. Both the first rotating arm 2 and the second rotating arm 3 are provided with a support wheel 5. When the support wheel 5 abuts against the inner wall of the ball's through hole, the ball and the support wheel 5 form a sliding fit.

[0031] The centering assembly 6 comprises two oppositely arranged centering plates 61, the centering plates 61 are provided with pre-holding portions 611, the body 1 is rotationally connected with a bidirectional screw rod 12, the two centering plates 61 correspond to the two opposite threaded portions of the bidirectional screw rod 12 one by one, and the centering plates 61 are threadedly connected with the corresponding threaded portions of the bidirectional screw rod 12, the bidirectional screw rod 12 is driven to rotate by a motor, and the shape of the pre-holding portion 611 is matched with the shape of the outer wall of the spherical body.

[0032] In the application, the spherical body of the titanium ball valve has a large volume, the spherical body is first hoisted to a work station to form a gap fit with the first rotating arm 2 through the central through hole thereof, then the second rotating arm 3 is axially moved to complete coaxial connection with the first rotating arm 2, at this time, the supporting wheel 5 is radially extended to be in contact with the inner wall of the spherical body to form a temporary support which can axially slide, the two centering plates 61 are synchronously moved towards each other to push the spherical body to move axially along the rotating arm to a preset position, and the pre-holding portion 611 pre-holds the bottom of the spherical body. After positioning is completed, the supporting wheel 5 is retracted, and the inner supporting assembly 4 is unfolded to be closely attached to the inner wall of the through hole of the spherical body. The first rotating arm 2 and the second rotating arm 3 synchronously drive the spherical body to synchronously rotate, and the plasma torch 11 immediately uniformly sprays the spherical surface. The through hole of the spherical body is supported by the inner supporting assembly 4, the surface of the spherical body is always located in the spraying area during rotation of the spherical body, and there is no empty spraying phenomenon, thereby reducing the waste of sprayed powder. The spherical body is centered and positioned by the centering assembly 6, so that the spraying track of the plasma torch 11 and the track of the surface of the spherical body do not correspond due to position deviation, thereby affecting the spraying effect.

[0033] With reference to Figure 2 and Figure 3 , the end of the first rotating arm 2 is provided with a plug-in groove 21, and the end of the second rotating arm 3 is integrally formed with a square plug-in block 31, the plug-in block 31 is plug-in fitted with the plug-in groove 21 to realize coaxial rotation of the first rotating arm 2 and the second rotating arm 3.

[0034] The inner supporting assembly 4 comprises a supporting plate 41 and a first air cylinder 42 for driving the supporting plate 41 to slide, the supporting plate 41 is provided with at least two, and three are taken as an example for description in the application, the number of the first air cylinder 42 is the same as that of the supporting plate 41 and corresponds one by one, the side of the first rotating arm 2 and the second rotating arm 3 close to each other is formed with a mounting portion 8, the cross section of the mounting portion 8 is in the shape of an isosceles triangle, the three first air cylinders 42 are respectively mounted on the three faces of the mounting portion 8, the supporting plate 41 is fixedly mounted on the end of the piston rod of the first air cylinder 42, and the three supporting plates 41 are arrayed along the circumference. The supporting plate 41 is mounted with a friction pad 411, and the friction pad 411 is made of rubber. The first air cylinder 42 is operated to drive the supporting plate 41 to abut against the inner wall of the through hole, the static friction force between the supporting plate 41 and the inner wall of the through hole is increased through the friction pad 411, and the spherical body can synchronously rotate with the supporting plate 41 when the rotating arm rotates.

[0035] The second air cylinder 9 is further installed on the mounting portion 8, and at least two second air cylinders 9 are provided, and three second air cylinders 9 are taken as an example in the application, the three second air cylinders 9 are respectively installed on the three faces of the mounting portion 8, the support wheels 5 are the same in number as the second air cylinders 9 and correspond to the second air cylinders 9 one by one, the piston rod end portions of the second air cylinders 9 are fixedly installed with mounting plates 91, and the support wheels 5 are installed on the mounting plates 91. The second air cylinder 9 is operated to drive the mounting plate 91 to move, so that the support wheel 5 can abut against the inner wall of the through hole.

[0036] With reference to Figure 2 And Figure 4 The arc-shaped plate 20 is installed on the body 1, the curvature center of the arc-shaped plate 20 is concentric with the center of the sphere, the arc-shaped plate 20 is provided with a sliding groove 201, the mounting seat 30 is slidably arranged in the sliding groove 201, the plasma torch 11 is installed on the mounting seat 30, the arc-shaped plate 20 is further provided with an arc-shaped rack 202, the mounting seat 30 is rotatably connected with a linkage gear 301, the linkage gear 301 is engaged with the arc-shaped rack 202, and the mounting seat 30 is installed with a driving motor 302, and the driving motor 302 drives the linkage gear 301 to rotate through a speed reducer.

[0037] In the spraying process, the driving motor 302 transmits power to the linkage gear 301 through the speed reducer, and drives the linkage gear 301 to move at a constant speed along the arc-shaped rack 202. The stable movement of the mounting seat 30 on the arc-shaped plate 20 is realized, so that the plasma torch 11 can perform trajectory coverage along the meridian direction of the sphere at a constant spraying distance.

[0038] The implementation principle of the spraying device for the wear-resistant coating of the titanium ball valve sphere is that the sphere is sleeved on the first rotating arm 2, then the second rotating arm 3 is inserted and matched with the first rotating arm 2, then the second air cylinder 9 drives the support wheel 5 to abut against the inner wall of the through hole of the sphere, at this time, the sphere can slide along the length direction of the rotating arm, the two pairs of middle plates 61 slide towards each other, the sphere is positioned, the center of the sphere is concentric with the curvature center of the arc-shaped plate 20, when the positioning is completed, the pre-supporting portion 611 supports the bottom of the sphere, at this time, the second air cylinder 9 drives the support wheel 5 to be separated from the inner wall of the through hole, and the first air cylinder 42 drives the support plate 41 to abut against the inner wall of the through hole at the same time, so that the synchronous rotation of the sphere and the rotating arm is realized; the plasma torch 11 slides on the arc-shaped plate 20, and cooperates with the rotation of the sphere, so that the spraying operation on the surface of the sphere can be realized, the plasma torch 11 will not have the empty spraying phenomenon, and the waste of the sprayed powder is reduced.

[0039] Embodiment 2 With reference to Figure 5The difference between the embodiment and embodiment 1 is that the friction pad 411 is not arranged on the support plate 41, a plurality of accommodating grooves 412 are arranged on the support plate 41, the support plate 41 is fixedly connected with a rotating shaft 413, the rotating shaft 413 is hingedly connected with a friction plate 414, the support plate 41 is provided with a support spring 415 in the accommodating groove 412, one end of the support spring 415 is connected with the inner wall of the accommodating groove 412, and the other end is connected with the friction plate 414. In the initial state, the friction plate 414 is arranged in an inclined manner, and when the support plate 41 abuts against the inner wall of the through hole, the end portion of the friction plate 414 is overlapped at the slot opening of the accommodating groove 412.

[0040] In the initial state, the inclined direction of the friction plate 414 is consistent with the rotating direction of the support plate 41, after the friction plate 414 abuts against the inner wall of the through hole, the friction plate 414 is overlapped at the slot opening of the accommodating groove 412 and cannot rotate, the two form static friction and rotate synchronously, and in the rotating process, the friction plate 414 always has a tendency to rotate away from the rotating direction of the support plate 41, that is, the friction plate 414 has a tendency to change from the inclined state to the vertical state. If the friction plate 414 changes from the inclined state to the vertical state, the straight line distance between the end portion of the friction plate 414 and the slot opening of the accommodating groove 412 increases. If the friction plate 414 and the inner wall of the through hole relatively rotate due to wear or other unexpected situations, the friction plate 414 will rotate a little along its tendency, increase the abutting force with the inner wall of the through hole, and then ensure the synchronous rotation of the two, that is, the arrangement of the friction plate 414 in the application can ensure that the two always rotate synchronously. Even if there is relative rotation, it will immediately abut again due to the action of the friction plate 414, ensuring the continuity of the rotation of the ball, preventing the rotation of the ball from stopping or being interrupted, and affecting the uniformity of spraying.

[0041] Embodiment 3 Referring to Figure 6 and Figure 7 The difference between the embodiment and embodiment 1 is that the inside of the support wheel 5 is hollow and filled with lubricating oil, the mounting plate 91 is symmetrically provided with a support plate 911, the two support plates 911 are fixedly provided with a connecting shaft 912, and the support wheel 5 is rotatably connected to the connecting shaft 912. A plurality of oil outlets 51 are arranged at intervals on the surface of the support wheel 5, and a blocking block 52 is arranged to slide at the oil outlet 51. The oil outlet 51 is in a trapezoidal shape, and the blocking block 52 is matched with the shape of the oil outlet 51.

[0042] The connecting shaft 912 is coaxially fixed with the linkage wheel 40, the linkage wheel 40 is formed with a recess 401, the inner side of the block 52 is fixedly connected with a connecting rod 521, the end of the connecting rod 521 is rotatably connected with an abutting wheel 522, the abutting wheel 522 abuts against the surface of the linkage wheel 40, the connecting rod 521 is provided with a limiting plate 523, and the connecting rod 521 is further sleeved with an abutting spring 524, one end of the abutting spring 524 is connected with the limiting plate 523, and the other end is connected with the inner end port side wall of the oil outlet 51.

[0043] The support wheel 5 rotates relative to the linkage wheel 40, when the abutting wheel 522 moves to the recess 401 of the linkage wheel 40, under the action of the abutting spring 524, the block 52 slides inward, and extrusion force is formed on the lubricating oil in the support wheel 5, at this time, the lubricating oil in the support wheel 5 is extruded and flows out from the oil outlet 51, and the contact between the support wheel 5 and the ball is lubricated, thereby helping to improve the smoothness of the ball when it is centrally moved.

[0044] In practice, the end of the connecting shaft 912 is provided with a supplement oil port, and the connecting shaft 912 is further provided with a communication port in communication with the supplement oil port, the communication port communicates with the inside of the support wheel 5, and the supplement oil port is connected with an oil pipe.

[0045] Embodiment 4 With reference to Figure 8 And Figure 9 The difference between this embodiment and embodiment 3 is that the oil outlet 51 is a square port, the shape of the block 52 is matched with the oil outlet 51, the block 52 protrudes from the surface of the support wheel 5, and the protruding amount is small, which does not affect the rotation of the support wheel 5, the inner end port of the oil outlet 51 is provided with a rubber diaphragm 50, the lower end of the block 52 is fixedly connected with the rubber diaphragm 50, and the width of the rubber diaphragm 50 is less than the length of the bottom wall of the block 52. The lower side of the block 52 is provided with an oil inlet 60, and the outer end wall of the block 52 is provided with an oil outlet 70, and the oil outlet 70 and the oil inlet 60 are communicated through an oil conveying channel 80.

[0046] During the rotation of the support wheel 5, when the block 52 contacts the inner wall of the ball, the block 52 is compressed, and the rubber diaphragm 50 is deformed, at this time, the lubricating oil in the support wheel 5 receives extrusion force and enters the oil inlet 60 of the block 52, when the block 52 is separated from the inside of the ball, the block 52 is reset under the action of the rubber diaphragm 50, and during the rotation of the support wheel 5, the lubricating oil in the oil inlet 60 gradually flows out from the oil outlet 70, and lubrication is realized.

[0047] The application discloses a spraying process for a wear-resistant coating of a titanium ball valve ball, and adopts the spraying device of any one of the above embodiments, and comprises the following steps: S1: hoisting a ball to be processed, and sleeving a through hole of the ball on the circumferential side of the first rotating arm 2; S2: the second rotating arm 3 slides and gradually inserts into the first rotating arm 2 to form coaxial rotating cooperation; S3: the inner support assembly 4 on the first rotating arm 2 and the second rotating arm 3 abuts against the inner wall of the through hole of the ball to support and fix the ball; S4: the first rotating arm 2 is driven to rotate, and the second rotating arm 3 is synchronously driven to rotate, so as to realize the rotation of the ball, and the plasma torch 11 slowly moves along the arc of the ball to spray the periphery of the ball, wherein the sprayed powder is basically composed of nanometer titanium oxide powder with rutile structure, and 5%-45% volume fraction of hard phase is added, and the powder is prepared into a spraying granularity of 15-45 μm; S5: cooling; S6: disassembling the ball for quality inspection; In the S2 step, when the second rotating arm 3 inserts into the first rotating arm 2, the support wheel 5 on the first rotating arm 2 and the second rotating arm 3 abuts against the inner wall of the through hole of the ball to form sliding cooperation, then the oppositely arranged centering plates 61 slide towards each other to center the position of the ball and pre-support the ball, and then the S3 step is performed.

[0048] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, therefore: any equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A spray apparatus for titanium ball valve ball wear resistant coating, characterized by: The utility model provides a plasma torch device, including body (1), first rotating arm (2), second rotating arm (3), inner support subassembly (4), support wheel (5), centering subassembly (6) and plasma torch (11), first rotating arm (2) rotation setting is in body (1), second rotating arm (3) slip setting is in body (1), and when second rotating arm (3) slip to first rotating arm (2) direction, with first rotating arm (2) insertion forms coaxial rotation cooperation, first rotating arm (2) and second rotating arm (3) all are equipped with inner support subassembly (4), first rotating arm (2) and second rotating arm (3) all are equipped with support wheel (5), support wheel (5) slip setting is in two rotating arms, and support wheel (5) supports the inner wall of spheroid and forms slip cooperation with spheroid, and centering subassembly (6) includes two synchronous slip setting's centering plate (61), and centering plate (61) is equipped with pre -supporting portion (611) on.

2. A spray device for applying a wear resistant coating to a titanium ball valve ball according to claim 1, wherein: The inner support subassembly (4) includes a support plate (41) and a first cylinder (42) for driving the support plate (41) to slide, the support plate (41) is provided with at least two, the number of the first cylinder (42) is the same as that of the support plate (41) and corresponds one by one, the first rotating arm (2) and the second rotating arm (3) are formed with mounting portions (8) on the sides close to each other, the first cylinder (42) is mounted at the mounting portion (8), and the support plate (41) is fixedly mounted at the end of the piston rod of the first cylinder (42).

3. A spray device for applying a wear resistant coating to a titanium ball valve ball according to claim 2, wherein: The mounting portion (8) is also provided with a second cylinder (9), and at least two second cylinders (9) are provided on the same mounting portion (8), the end of the piston rod of the second cylinder (9) is provided with a mounting plate (91), and the support wheel (5) is mounted on the mounting plate (91).

4. A spray device for titanium ball valve ball wear resistant coating according to claim 1, characterized in that: The body (1) is provided with an arc-shaped plate (20), the mounting seat (30) is slidably arranged on the arc-shaped plate (20), the plasma torch (11) is arranged on the mounting seat (30), the center of curvature of the arc-shaped plate (20) is concentric with the center of the sphere, the arc-shaped plate (20) is provided with an arc-shaped rack (202), the mounting seat (30) is rotatably connected with a linkage gear (301), the linkage gear (301) is engaged with the arc-shaped rack (202), and the mounting seat (30) is provided with a driving motor (302) for driving the linkage gear (301) to rotate.

5. A spray device for titanium ball valve ball wear resistant coating according to claim 1, characterized in that: The body (1) is rotatably provided with a bidirectional screw rod (12), the two centering plates (61) are threadedly connected to the two threaded portions of the bidirectional screw rod (12), and the shape of the pre-supporting portion (611) is matched with the shape of the outer wall of the sphere.

6. A spray device for titanium ball valve ball wear resistant coating according to claim 1, characterized in that: The end of the first rotating arm (2) is provided with an insertion slot (21), and the end of the second rotating arm (3) is provided with a square-shaped insertion block (31), the insertion block (31) is inserted into the insertion slot (21).

7. A spray device for titanium ball valve ball wear resistant coating according to claim 2, characterized in that: A plurality of accommodating grooves (412) are formed in the support plate (41), and a friction plate (414) is hingedly connected in each of the accommodating grooves (412); a support spring (415) is arranged in each of the accommodating grooves (412), one end of the support spring (415) is connected to the inner wall of the accommodating groove (412), the other end of the support spring (415) is connected to the friction plate (414), and the friction plate (414) is arranged in an inclined manner in an initial state; when the support plate (41) abuts against the inner wall of the through hole, the friction plate (414) is overlapped at the groove opening of the accommodating groove (412).

8. A spray device for titanium ball valve ball wear resistant coating according to claim 3, characterized in that: The support wheel (5) is hollow and filled with lubricating oil, the mounting plate (91) is symmetrically provided with a support plate (911), the two support plates (911) are fixedly connected with a connecting shaft (912), and the support wheel (5) is rotatably connected to the connecting shaft (912); the surface of the support wheel (5) is spaced apart to form an oil outlet (51), the oil outlet (51) is in a trapezoidal shape, and the support wheel (5) is slidably provided with a blocking block (52) at the oil outlet (51).

9. A spray device for titanium ball valve ball wear resistant coating according to claim 4, characterized in that: The blocking block (52) protrudes from the surface of the support wheel (5), the support wheel (5) is provided with a rubber diaphragm (50) at the inner end of the oil outlet (51), the lower end of the blocking block (52) is fixedly connected with the rubber diaphragm (50), the lower side of the blocking block (52) is provided with an oil inlet (60), and the outer end wall of the blocking block (52) is provided with an oil outlet (70) in communication with the oil inlet (60).

10. A spraying process for a wear resistant coating of a titanium ball valve ball body using the spraying device according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: S1: hoisting the ball to be processed, and sleeving the through hole of the ball on the circumferential side of the first rotating arm (2); S2: sliding the second rotating arm (3) and gradually inserting it into the first rotating arm (2) to form coaxial rotating cooperation; S3: the inner support assembly (4) on the first rotating arm (2) and the second rotating arm (3) abuts against the inner wall of the through hole of the ball to support and fix the ball; S4: driving the first rotating arm (2) to rotate, synchronously driving the second rotating arm (3) to rotate, realizing the rotation of the ball, and slowly moving the plasma torch (11) along the arc of the ball to spray the circumferential side of the ball, wherein the sprayed powder is prepared from rutile structure nano titanium oxide powder as a basic component, 5%-45% volume fraction of hard phase, and 15-45 μm sprayed particle size; S5: cooling; S6: disassembling the ball for quality inspection; In the S2 step, when the second rotating arm (3) is inserted into the first rotating arm (2), the support wheel (5) on the first rotating arm (2) and the second rotating arm (3) abuts against the inner wall of the through hole of the ball to form sliding cooperation, then the oppositely arranged centering plates (61) slide towards each other to center the position of the ball and pre-support the ball, and then the S3 step is performed.

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