A pump casing surface spraying device and spraying method

Abstract

The application provides a pump shell surface spraying device and a spraying method, and belongs to the technical field of spraying equipment. The pump shell surface spraying device comprises a machine tool and a workbench arranged on the machine tool. A placing assembly for placing a pump shell is arranged on the workbench. A main spraying group is arranged on one side of the placing assembly. The main spraying group comprises a fixed plate and a support plate rotatably arranged on the fixed plate. A moving frame is slidably connected in the support plate. An induction assembly is arranged on the moving frame. The induction rod can be used for sensing different shapes of the outer wall of the pump shell in real time. The distance between the spray head and the outer wall of the pump shell is constant during spraying, so that quality problems caused by uneven spraying are avoided. Meanwhile, the automatic adjustment can be performed according to the holes or reinforcing ribs and other structures existing on the outer wall of the pump shell. The invalid spraying in the holes is avoided, the coating reinforcement coverage of the convex root and edge is improved, and the shadow area and the missing points in the traditional spraying are avoided.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of spraying equipment, and particularly relates to a pump shell surface spraying device and a spraying method. BACKGROUND

[0002] The pump shell is one of the core components of fluid machinery such as centrifugal pumps and mixed flow pumps, and it is not only a container but also a powerful energy conversion component. Pump shell surface spraying refers to uniformly and firmly covering the coating on the surface of the pump shell to build a firm and durable functional protective layer on the surface of the pump shell to resist corrosion and wear and ensure the long-term stable operation of the pump shell under harsh working conditions.

[0003] A water pump shell production outer surface spraying device is disclosed in Chinese Patent No. CN118403749B, which comprises a spraying machine box. A plugging part is arranged in the middle of the bottom wall of the spraying machine box, and a positioning part is arranged in the middle of the bottom wall of the spraying machine box. The plugging part can plug the top water inlet hole and the side wall water inlet hole of the pump shell, preventing the coating from entering the interior of the pump shell. The skin is inflated to tightly abut against the inner wall of the side wall water inlet hole, improving the sealing performance of plugging and enhancing the plugging effect. The positioning part positions the pump shell to improve the stability of the pump shell during spraying. Compared with the prior art, the positioning part does not need to be independently controlled to improve the convenience of using the device and the work efficiency.

[0004] However, the above technical solution still has the following defects. When spraying the outer wall of the pump shell, it is difficult to maintain the optimal spraying angle due to the complex structure of the outer wall of the pump shell, such as holes, protrusions or reinforcing ribs, which can easily cause uneven distribution of the coating. This not only causes waste such as over-thick coating and sagging, but also causes local coating to be too thin to form a complete protective layer, so that the outer wall of the pump shell cannot be completely covered by the coating. This can cause early cracking and peeling of the coating, and further cause local corrosion and wear of the outer wall of the pump shell, ultimately shortening the service life of the pump shell. SUMMARY

[0005] The present application aims to provide a pump shell surface spraying device and a spraying method to solve the problem of uneven distribution of the coating in the prior art due to the complex structure of the outer wall of the pump shell during spraying.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solution: a pump shell surface spraying device, comprising a machine tool and a workbench arranged on the machine tool, a placing assembly for placing the pump shell is arranged on the workbench, a main spraying group is arranged on one side of the placing assembly, the main spraying group comprises a fixed plate and a support plate rotatably arranged on the fixed plate, a moving frame is slidably connected in the support plate, and a sensing assembly is arranged on the moving frame.

[0007] The induction assembly comprises a guide frame and an induction rod slidingly arranged on the guide frame, the guide frame is arranged on the moving frame and can reciprocate along the inside of the moving frame, the guide frame is provided with a first elastic member for resetting the guide frame, the induction rod is provided with a second elastic member for resetting the induction rod, the side of the induction rod away from the second elastic member is provided with a contact piece, the contact piece can contact the outer wall of the pump shell during spraying, the side of the induction rod close to the contact piece is provided with a protective cover for protecting the contact piece, the induction rod is provided with a spraying plate, the spraying plate is provided with a main spray head, and the coating sprayed by the main spray head can cover the area scanned after the contact point of the contact piece and the outer wall of the pump shell.

[0008] Further technical solutions of the present application are that the main spraying group is provided with a vertical surface spraying group, the vertical surface spraying group comprises guide columns arranged on both sides of the guide frame, the support plate is provided with guide grooves slidingly matched with the guide columns, the guide grooves are inclinedly arranged along the moving direction of the guide frame, the moving frame is provided with a first induction piece close to the induction rod, the spraying plate is provided with a first indication plate matched with the first induction piece, the first induction piece is used for detecting the position of the induction rod, the support plate is provided with a second induction piece, the moving frame is provided with a second indication plate matched with the second induction piece, and the second induction piece is used for detecting the position of the moving frame.

[0009] Further technical solutions of the present application are that two groups of spraying rods are rotationally arranged on the moving frame, the spraying rods are horizontally symmetrically arranged on both sides of the induction rod, one end of the spraying rod is provided with a side spray head, the side spray head is located on the side close to the pump shell, the moving frame is provided with a first driving device capable of driving the spraying rod to rotationally move around the axis, and the moving frame is provided with a hose penetrating through the spraying rod.

[0010] Further technical solutions of the present application are that the main spraying group is provided with a compensation spraying group, the compensation spraying group comprises multiple groups of compensation spray heads arranged on the spraying plate, the compensation spray heads are uniformly arranged outside the main spray head, and the spraying plate is provided with a control valve.

[0011] Further technical solutions of the present application are that a guide rail is slidingly arranged on the workbench, the guide rail is arranged on one side of the placing assembly, the main spraying group is slidingly arranged on the guide rail, and a driving assembly is installed in the machine tool.

[0012] Further technical solutions of the present application are that the fixed plate is slidingly arranged on the guide rail, the fixed plate is connected with the guide rail in a matched mode at both sides, the support plate is arranged on the side of the fixed plate close to the pump shell, the support plate is provided with multiple groups of sliding grooves, the moving frame is provided with sliding blocks matched with the sliding grooves, the two ends of the first elastic member are connected with the guide frame and the moving frame respectively, and the two ends of the second elastic member are connected with the induction rod and the guide frame respectively.

[0013] Further, the first elastic member and the second elastic member are springs, the elastic coefficient of the second elastic member is smaller than that of the first elastic member, and the protective cover is arranged outside the contact member and has a horn shape and is made of soft and wear-resistant material.

[0014] Further, the placing assembly comprises a fixing member arranged on the workbench, the bottom of the workbench is provided with a second driving device capable of driving the fixing member to rotate around a fixed shaft, and the fixing plate is provided with a third driving device capable of driving the support plate to rotate around a fixed shaft on the side away from the support plate.

[0015] A pump shell surface spraying method comprises the following steps:

[0016] S1, holes and reinforcing rib positions of different heights of the pump shell are measured in advance, and then the pump shell is fixed to the placing assembly;

[0017] S2, the main spraying group is close to the outer wall of the pump shell, and the contact member on the sensing rod is in contact with the outer wall of the pump shell, the relative position between the main spraying head and the sensing rod is kept unchanged, and the protrusions or recesses on the outer wall of the pump shell are sprayed;

[0018] S3, when the sensing rod moves to the outer vertical surface of the protrusion on the outer wall of the pump shell, the guide frame drives the sensing rod to gradually move away from the pump shell, the angle of the side spraying head on the spraying rod is adjusted when the main spraying group is at different heights of the pump shell, and then the side end surface of the outer vertical surface of the protrusion on the outer wall of the pump shell is sprayed;

[0019] S4, when the sensing rod moves into the hole, the compensation spraying head works and sprays finer and lower coverage particles to spray the edge and root position of the hole;

[0020] S5, when the flange at the bottom of the pump shell is finally sprayed, the two groups of side spraying heads are first adjusted to be vertically arranged, the side spraying heads are close to the upper and lower sides of the flange, the contact member is moved to the outermost vertical end surface of the flange, and then the side spraying heads are controlled to synchronously spray the upper and lower surfaces and the outer surface of the flange;

[0021] S6, the main spraying group moves along the guide rail, after all positions of the pump shell are sprayed, the main spraying group is adjusted to return to the initial position, the guide rail is controlled to move away from the pump shell, and finally the sprayed pump shell is taken down.

[0022] Compared with the prior art, the pump shell surface spraying method has the following beneficial effects:

[0023] 1, by arranging the sensing rod, different shapes of the outer wall of the pump shell can be sensed in real time, the distance between the spraying head and the outer wall of the pump shell is kept constant during spraying, and quality problems caused by uneven spraying are avoided.

[0024] 2. The present invention can automatically adjust according to the holes or reinforcing ribs on the outer wall of the pump casing. While avoiding ineffective spraying inside the holes, it improves the coating coverage of the root and edge of the protrusion, avoiding the shadow areas and omissions of traditional spraying. Attached Figure Description

[0025] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0026] Figure 1 This is a schematic diagram of the overall structure of a specific embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the internal structure of a specific embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the main spraying assembly and pump housing in a specific embodiment of the present invention;

[0029] Figure 4 This is a front view of the overall structure of the main spraying assembly in a specific embodiment of the present invention;

[0030] Figure 5 This is a partial structural diagram of the main spraying assembly in a specific embodiment of the present invention;

[0031] Figure 6 This is a partial cross-sectional view of the main spraying assembly in a specific embodiment of the present invention;

[0032] Figure 7 This is a schematic diagram of the cooperation structure between the guide frame and the sensing rod in a specific embodiment of the present invention;

[0033] Figure 8 This is a schematic diagram of the cooperation structure between the fixed plate, the support plate, and the movable frame in a specific embodiment of the present invention;

[0034] Figure 9 This is a schematic diagram of the structure of the mobile frame in a specific embodiment of the present invention;

[0035] Figure 10 This is a schematic diagram of the installation structure of the facade spraying group in a specific embodiment of the present invention;

[0036] Figure 11 This is a schematic diagram of the facade spraying assembly in a specific embodiment of the present invention;

[0037] Figure 12 This is a schematic diagram of the structure of the compensation spraying group in a specific embodiment of the present invention.

[0038] In the figure: 1, machine tool; 2, workbench; 21, guide rail; 3, placing assembly; 31, fixed part; 32, second driving device; 4, main spraying group; 41, fixed plate; 42, support plate; 421, sliding groove; 422, guide groove; 43, moving frame; 431, sliding block; 44, guide frame; 441, first elastic part; 442, guide column; 45, induction rod; 451, second elastic part; 452, contact part; 453, protective cover; 454, spraying plate; 455, main spray head; 5, facade spraying group; 51, first induction part; 52, first indication plate; 53, second induction part; 54, second indication plate; 55, spray rod; 551, side spray head; 56, first driving device; 57, hose; 6, compensation spraying group; 61, compensation spray head; 62, control valve; 7, third driving device. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0040] Please refer to Figures 1-12 The present application provides the following technical solutions: a pump shell surface spraying device, comprising a machine tool 1, a workbench 2, a placing assembly 3, a main spraying group 4, a facade spraying group 5, and a compensation spraying group 6.

[0041] The machine tool 1 is horizontally placed on the ground, the workbench 2 is arranged on the machine tool 1, the placing assembly 3 is arranged on the workbench 2, the pump shell to be sprayed is placed on the placing assembly 3, the pump shell can be fixed and driven to rotate by the placing assembly 3, the main spraying group 4 is arranged on one side of the placing assembly 3, the spraying direction of the main spraying group 4 is arranged vertically to the outer wall of the pump shell, the outer wall of the pump shell can be sprayed by the main spraying group 4, the facade spraying group 5 is arranged on the main spraying group 4, since there are holes or reinforcing ribs and other protrusions on the outer wall of the pump shell, the facade spraying group 5 can spray the protruding outer facade positions which cannot be completely covered by the main spraying group 4, the compensation spraying group 6 is arranged on the main spraying group 4, the compensation spraying group 6 can spray the hole periphery or the protrusion root, avoiding that the main spraying group 4 sprays the coating into the hole to cause waste, even leading to over-spraying and sagging, or the protrusion root may form a shadow area due to the coating not being easily covered, leading to the problem of a thinner coating.

[0042] Please refer to Figures 1-2The workbench 2 is slidably provided with a guide rail 21, which is arranged at one side of the placing assembly 3. The main spraying group 4 is slidably arranged on the guide rail 21. The machine tool 1 is internally provided with a driving assembly (not shown in the figure). The driving assembly can control the guide rail 21 to reciprocatingly move along the workbench 2 to approach or move away from the placing assembly 3, and can control the main spraying group 4 to slide up and down along the guide rail 21.

[0043] Please refer to Figures 2-8 The main spraying group 4 comprises a fixed plate 41 slidably arranged on the guide rail 21. The fixed plate 41 is connected with the guide rail 21 at both sides to slide along the guide rail 21. A supporting plate 42 is rotatably arranged on the side of the fixed plate 41 close to the pump shell. A moving frame 43 is slidably connected in the supporting plate 42. A plurality of slide grooves 421 are arranged on the supporting plate 42. A slide block 431 matched with the slide grooves 421 is arranged on the moving frame 43, so that the moving frame 43 can reciprocatingly slide along the supporting plate 42. The moving frame 43 is provided with a sensing assembly. The sensing assembly comprises a guide frame 44 and a sensing rod 45 arranged on the guide frame 44. The guide frame 44 is arranged on the moving frame 43 and can reciprocatingly slide in the moving frame 43. A first elastic member 441 is arranged at one end of the guide frame 44. The other end of the first elastic member 441 is connected with the moving frame 43. In the initial state, the guide frame 44 is located at the side away from the supporting plate 42 of the moving frame 43 under the action of the first elastic member 441. In the embodiment, the first elastic member 441 is a spring.

[0044] The induction rod 45 is slidingly arranged on the guide frame 44, and the induction rod 45 is arranged on the side of the guide frame 44 away from the first elastic member 441. One end of the induction rod 45 is provided with a second elastic member 451, and the other end of the second elastic member 451 is connected with the guide frame 44. In the initial state, under the action of the second elastic member 451, the induction rod 45 is located on the side of the guide frame 44 away from the moving frame 43. In the embodiment, the second elastic member 451 is arranged as a spring, and the elastic coefficient of the second elastic member 451 is smaller than that of the first elastic member 441. The side of the induction rod 45 away from the second elastic member 451 is provided with a contact member 452, which can contact the outer wall of the pump shell during spraying. In the embodiment, the contact member 452 is arranged as a ball or a roller, and the hardness of the contact member 452 is smaller than that of the pump shell, so as to prevent scratching the outer wall of the pump shell. The side of the induction rod 45 close to the contact member 452 is provided with a protective cover 453, which is arranged outside the contact member 452 and is arranged in a horn shape, so as to protect the contact member 452 and prevent paint from being sprayed onto the contact member 452. In the embodiment, the protective cover 453 is made of soft and wear-resistant materials, such as rubber or silicone. The induction rod 45 is provided with a spraying plate 454, and the spraying plate 454 is provided with a main spray head 455. The main spray head 455 can spray large-area paint with high flow rate, so as to quickly cover the main area. In the initial state, the main spray head 455 is located at the same horizontal height as the induction rod 45, and the paint sprayed by the main spray head 455 can cover the rear of the contact point between the contact member 452 and the outer wall of the pump shell, i.e. the area that has been scanned by the contact member 452, so that the paint can be sprayed to the side of the protective cover 453, thereby avoiding waste of paint and ensuring that the spraying position is close to the rear of the contact member 452.

[0045] During work, the guide rail 21 is first controlled to move the main spraying group 4 to the side of the pump shell, so that the contact member 452 contacts the outer wall of the pump shell and compresses the second elastic member 451. Then, the assembly 3 is placed to drive the pump shell to rotate, and the outer wall shape of the pump shell is detected by the contact member 452 arranged on the induction rod 45. The main spray head 455 can spray the surface of the pump shell that has been detected. When there is a slight protrusion or depression on the outer wall of the pump shell, the contact member 452 can move along the protrusion or depression, and under the action of the second elastic member 451, the contact member 452 drives the induction rod 45 to move closer to or away from the guide frame 44, and ensures that the contact member 452 always contacts the outer wall of the pump shell. Since the main spray head 455 is arranged on the spraying plate 454, and the spraying plate 454 is arranged on the induction rod 45, the distance between the main spray head 455 and the contact member 452 remains unchanged, which ensures that the distance between the main spray head 455 and the outer wall of the pump shell is constant, so that the coverage area of the paint sprayed and diffused to the outer wall of the pump shell remains unchanged, thereby avoiding that the main spray head 455 is too far or too close to the outer wall of the pump shell, which causes the paint not to be completely diffused or the diffusion area to be too large, resulting in that the coating is too thick or too thin, which affects the quality of the coating. The existing detection equipment is prone to spraying errors due to the reaction lag caused by the spray interference during paint spraying.

[0046] Please refer to Figures 4-11 , the facade spraying group 5 includes guide columns 442 arranged on both sides of the guide frame 44, the support plate 42 is provided with guide grooves 422 in sliding fit with the guide columns 442, the guide grooves 422 are arranged obliquely along the moving direction of the guide frame 44, when the guide frame 44 is located on the side away from the support plate 42 of the moving frame 43, the end of the guide groove 422 away from the guide column 442 is arranged close to the main spray head 455. The moving frame 43 is provided with a first sensing part 51 on the side close to the sensing rod 45, the first sensing part 51 can be arranged as an infrared sensor, the spraying plate 454 is provided with a first indicating plate 52 used in cooperation with the first sensing part 51, when the sensing rod 45 reciprocally slides along the guide frame 44, the first sensing part 51 and the first indicating plate 52 always correspond, the first sensing part 51 is used for detecting the position of the sensing rod 45, and further judging the moving distance of the sensing rod 45 and the shape of the outer wall of the pump shell. The support plate 42 is provided with a second sensing part 53, the second sensing part 53 can be arranged as an infrared sensor, the moving frame 43 is provided with a second indicating plate 54 used in cooperation with the second sensing part 53, when the moving frame 43 reciprocally moves along the support plate 42, the second sensing part 53 and the second indicating plate 54 always correspond, the second sensing part 53 is used for detecting the position of the moving frame 43, and further judging the moving distance of the moving frame 43 and the height of the convex outer facade of the outer wall of the pump shell.

[0047] The moving frame 43 is rotatably provided with two groups of spray rods 55, the spray rods 55 are horizontally symmetrically arranged on both sides of the sensing rod 45, one end of the spray rod 55 is provided with a side spray head 551, the side spray head 551 is located on the side close to the pump shell, and the convex outer facade of the outer wall of the pump shell can be sprayed through the side spray head 551. The moving frame 43 is installed with a first driving device 56, the output end of the first driving device 56 is connected with the spray rod 55, the spray rod 55 can be driven to rotate around the axis by the first driving device 56, and further adjust the spraying angle of the side spray head 551. The moving frame 43 is provided with a soft pipe 57 penetrating through the spray rod 55, the coating can be sent into the spray rod 55 through the soft pipe 57 and sprayed out from the side spray head 551.

[0048] When the contact piece 452 on the induction rod 45 moves to the outer side of the protrusion of the outer wall of the pump shell, the contact piece 452 cannot continue to move, and as the placing assembly 3 drives the pump shell to rotate, the outer side is in contact with the side of the induction rod 45 and extrudes it, thereby pushing the guide columns 442 on both sides of the guide frame 44 to move along the guide groove 422, at this time the second elastic piece 451 on the induction rod 45 returns to the initial stress-free state, and the first elastic piece 441 is compressed and deformed, and then the guide frame 44 drives the induction rod 45 to gradually move away from the pump shell. When the second elastic piece 451 returns to the initial stress-free state, the guide frame 44 is relatively stationary with the induction rod 45, at this time the first induction piece 51 detects that the relative position of the induction rod 45 no longer changes, and the contact piece 452 just escapes from the angle between the outer wall of the pump shell and the outer side thereof. At this time, the spray rod 55 starts to work, and the paint is sprayed to the contact position between the outer wall of the pump shell and the outer side thereof through the side spray head 551 on the spray rod 55. The reinforcing ribs of the pump shell are mostly located at the bottom, and the holes are commonly found on the upper side wall, and the distance between the outer sides of the two sides is different according to the height of the outer wall of the pump shell. When the main spraying group 4 moves to different heights of the pump shell, the rotation angles of the two groups of first driving devices 56 are adjusted to make the side spray head 551 spray to the outer wall of the pump shell and the outer side thereof to adapt to the width requirement of the hole or reinforcing rib. Then the guide frame 44 continues to move, and the second induction piece 53 detects that the position of the moving frame 43 is constantly changing, and the contact piece 452 constantly moves away from the outer wall of the pump shell along the outer side. At this time, the rotation angle of the spray rod 55 is continuously adjusted through the first driving device 56, so that the paint sprayed by the side spray head 551 can completely cover the outer side. When the second induction piece 53 detects that the position of the moving frame 43 no longer changes, at this time the contact piece 452 just moves to the outermost end face of the outer side, and the paint sprayed by the two groups of side spray heads 551 can cover the side end face for spraying, to ensure that all the outer sides can be uniformly covered with paint.

[0049] Please refer to Figures 4-7 and Figure 12 , the compensation spraying group 6 includes a plurality of compensation spray heads 61 arranged on the spraying plate 454, the compensation spray heads 61 are uniformly arranged outside the main spray head 455, and the compensation spray heads 61 spray paint with lower flow and smaller coverage area, and the granularity of the spray is finer. The spraying plate 454 is provided with a control valve 62, which can adjust the flow of paint to the main spray head 455 or the compensation spray head 61, and spray through the main spray head 455 or the compensation spray head 61.

[0050] When the contact 452 just crosses the side of the hole, the contact 452 directly falls into the hole, at this time, the components on the main spraying group 4 are restored to the initial state of not being in contact with the outer wall of the pump shell under the action of the first elastic member 441 and the second elastic member 451, at this time, the first sensing member 51 and the second sensing member 53 simultaneously detect that the components move to the initial position. Then the side nozzle 551 is closed, the control valve 62 is operated and the compensation nozzle 61 is opened, and the hole edge is sprayed. The particles sprayed by the compensation nozzle 61 are smaller in spraying range and finer in particles, which helps to form a smoother coating, especially when covering the hole edge, which can reduce the sagging effect, at the same time, avoids the waste of paint caused by opening the main nozzle 455, ensures accurate coverage of the target edge, and reduces over-spraying. When the contact 452 contacts the inner side wall of the hole and gradually separates from the hole, since the outer side wall of the hole has been sprayed, the side nozzle 551 does not work at this time, until the contact 452 completely separates from the hole and contacts the outer side of the pump shell, then the main nozzle 455 is opened and the outer wall of the pump shell is continuously sprayed. When spraying the root of the reinforcing rib, the compensation nozzle 61 can be opened first, since the spraying range of the compensation nozzle 61 is smaller, it can accurately deliver paint to the corner of the root, ensuring that the hole or the root of the reinforcing rib has sufficient coating thickness, enhancing its corrosion resistance and service life, then the side nozzle 551 is opened for spraying.

[0051] Please refer to Figure 2 The placing assembly 3 comprises a fixing member 31 arranged on the workbench 2, and the fixing member 31 can contact and fix the bottom surface and the inner part of the pump shell. The workbench 2 is provided with a second driving device 32 at the bottom, and the output end of the second driving device 32 is connected with the fixing member 31. The fixing member 31 can be driven to rotate around the axis by the second driving device 32, so as to adjust the spraying angle of the pump shell.

[0052] Please refer to Figures 2-4 The fixing plate 41 is provided with a third driving device 7 away from the supporting plate 42, and the output end of the third driving device 7 is connected with the supporting plate 42. The supporting plate 42 can be driven to rotate around the axis by the third driving device 7, so as to adjust the rotation of the main spraying group 4.

[0053] After the outer wall of the pump shell is sprayed by the main spraying group 4, the third driving device 7 is adjusted to rotate the main spraying group 4 by a certain angle, so that the two groups of side nozzles 551 are vertically arranged. Since the bottom flange of the pump shell is arranged on the placing assembly 3 and is fixed in position, at this time, the contact piece 452 is moved to the outermost vertical end surface of the flange, and then the side nozzles 551 are controlled to synchronously spray the upper and lower surfaces of the flange, and the compensation nozzle 61 is opened to spray the outer vertical end surface of the flange, so that the coating can cover the outer vertical end surface and the root corner of the flange connected with the pump shell, eliminate the spraying shadow that may be left by the side nozzles 551, ensure that the upper and lower surfaces of the flange are sprayed, and prevent the position connected with the pump shell from being easily corroded due to insufficient spraying.

[0054] A pump shell surface spraying method, comprising the following steps:

[0055] S1, the positions of the holes and the reinforcing ribs arranged at different heights of the pump shell are measured in advance, and then the pump shell is fixed to the placing assembly 3;

[0056] S2, the main spraying group 4 is close to the outer wall of the pump shell and the contact piece 452 on the sensing rod 45 is in contact with the outer wall of the pump shell, and the protrusions or depressions existing on the outer wall of the pump shell are sprayed by keeping the relative position of the main nozzle 455 and the sensing rod 45 unchanged;

[0057] S3, when the sensing rod 45 moves to the outer vertical surface of the protrusion of the pump shell, the guide frame 44 drives the sensing rod 45 to gradually move away from the pump shell, and the angle of the side nozzles 551 on the spraying rod 55 is adjusted at this time, so that the side end surface of the outer vertical surface of the protrusion of the pump shell is sprayed;

[0058] S4, when the sensing rod 45 moves into the hole, the compensation nozzle 61 works and sprays finer particles with lower coverage, so as to spray the edge and root position of the hole;

[0059] S5, when the flange at the bottom of the pump shell is finally sprayed, the two groups of side nozzles 551 are first adjusted to be vertically arranged, so that the side nozzles 551 are close to the upper and lower surfaces of the flange, the contact piece 452 is moved to the outermost vertical end surface of the flange, and then the side nozzles 551 are controlled to synchronously spray the upper and lower surfaces and the outer surface of the flange;

[0060] S6, after the main spraying group 4 moves along the guide rail 21 and all positions of the pump shell are sprayed, the main spraying group 4 is adjusted to return to the initial position, and the guide rail 21 is controlled to move away from the pump shell, and finally the sprayed pump shell is taken down.

Claims

1. A pump casing surface spraying device, comprising: A machine tool (1) and a worktable (2) set on the machine tool (1), wherein a placement assembly (3) for placing a pump casing is provided on the worktable (2), characterized in that a main spraying assembly (4) is provided on one side of the placement assembly (3), the main spraying assembly (4) includes a fixed plate (41) and a support plate (42) rotatably set on the fixed plate (41), a movable frame (43) is slidably connected inside the support plate (42), and a sensing assembly is provided on the movable frame (43); The sensing assembly includes a guide frame (44) and a sensing rod (45) slidably mounted on the guide frame (44). The guide frame (44) is mounted on a movable frame (43) and can reciprocate along the interior of the movable frame (43). A first elastic element (441) for resetting the guide frame (44) is provided on the guide frame (44), and a second elastic element (451) for resetting the sensing rod (45) is provided on the sensing rod (45). A receiving point is provided on the side of the sensing rod (45) away from the second elastic element (451). Contact element (452) can contact the outer wall of the pump casing during spraying. A protective cover (453) is provided on the side of the sensing rod (45) near the contact element (452). The protective cover (453) is used to protect the contact element (452). A spraying plate (454) is provided on the sensing rod (45). A main nozzle (455) is provided on the spraying plate (454). The paint sprayed by the main nozzle (455) can cover the area scanned after the contact point between the contact element (452) and the outer wall of the pump casing. The main spraying unit (4) is equipped with a vertical spraying unit (5). The vertical spraying unit (5) includes guide columns (442) on both sides of the guide frame (44). The support plate (42) is equipped with a guide groove (422) that slides with the guide column (442). The guide groove (422) is inclined along the moving direction of the guide frame (44). The moving frame (43) is equipped with a first sensor (51) on the side near the sensing rod (45). The spraying plate (454) is equipped with a first indicator plate (52) that works with the first sensor (51). The first sensor (51) is used to detect the position of the sensing rod (45). The support plate (42) is equipped with a second sensor (53). The moving frame (43) is equipped with a second indicator plate (54) that works with the second sensor (53). The second sensor (53) is used to detect the position of the moving frame (43). The support plate (42) is provided with multiple sets of sliding grooves (421), and the movable frame (43) is provided with a slider (431) that cooperates with the sliding grooves (421). The two ends of the first elastic element (441) are connected to the guide frame (44) and the movable frame (43) respectively, and the two ends of the second elastic element (451) are connected to the sensing rod (45) and the guide frame (44) respectively. The first elastic element (441) and the second elastic element (451) are set as springs, and the elastic coefficient of the second elastic element (451) is smaller than that of the first elastic element (441).

2. The pump casing surface spraying device according to claim 1, characterized in that: Two sets of spray bars (55) are rotatably mounted on the movable frame (43). The spray bars (55) are horizontally and symmetrically arranged on both sides of the sensing rod (45). A side nozzle (551) is provided at one end of the spray bar (55). The side nozzle (551) is located on the side close to the pump casing. A first driving device (56) capable of driving the spray bar (55) to rotate on a fixed axis is installed on the movable frame (43). A flexible hose (57) communicating with the spray bar (55) is provided on the movable frame (43).

3. The pump casing surface spraying device according to claim 2, characterized in that: The main spraying group (4) is provided with a compensation spraying group (6), which includes multiple sets of compensation nozzles (61) on the spraying plate (454). The compensation nozzles (61) are evenly arranged outside the main nozzle (455), and the spraying plate (454) is provided with control valves (62).

4. The pump casing surface spraying device according to claim 3, characterized in that: The workbench (2) is slidably provided with a guide rail (21), which is located on one side of the placement component (3). The main spraying assembly (4) is slidably provided on the guide rail (21), and the machine tool (1) is equipped with a drive assembly.

5. The pump casing surface spraying device according to claim 4, characterized in that: The fixing plate (41) is slidably mounted on the guide rail (21), and the two sides of the fixing plate (41) are connected to the guide rail (21). The support plate (42) is mounted on the side of the fixing plate (41) near the pump casing.

6. The pump casing surface spraying device according to claim 5, characterized in that: The protective cover (453) is located outside the contact (452) and is flared. The protective cover (453) is made of a soft and wear-resistant material.

7. The pump casing surface spraying device according to claim 6, characterized in that: The placement assembly (3) includes a fixing member (31) set on the workbench (2), a second driving device (32) that can drive the fixing member (31) to rotate on a fixed axis is provided at the bottom of the workbench (2), and a third driving device (7) that can drive the support plate (42) to rotate on a fixed axis is provided on the side of the fixing plate (41) away from the support plate (42).

8. A method for spraying a pump casing surface, characterized in that: The pump casing surface spraying device as described in claim 7 includes the following steps: S1. Measure the positions of the holes and reinforcing ribs at different heights of the pump casing in advance, and then fix the pump casing to the placement assembly (3); S2. The main spraying unit (4) approaches the outer wall of the pump casing and makes the contact (452) on the sensing rod (45) contact the outer wall of the pump casing. By keeping the relative position of the main nozzle (455) and the sensing rod (45) unchanged, it sprays the protrusions or depressions on the outer wall of the pump casing. S3. When the sensing rod (45) moves to the raised outer surface of the pump casing, the guide frame (44) drives the sensing rod (45) to gradually move away from the pump casing. By adjusting the angle of the side nozzle (551) on the spray bar (55) at different heights of the main spraying group (4) on the pump casing, the side end face of the raised outer surface of the pump casing is sprayed. S4. When the sensing rod (45) moves into the hole, the compensating nozzle (61) works and sprays finer particles with a lower coverage area to spray the edge and root of the hole. S5. When spraying the flange at the bottom of the pump casing, first adjust the two sets of side nozzles (551) to be set vertically, so that the side nozzles (551) are close to the upper and lower sides of the flange, move the contact (452) to the outermost vertical end face of the flange, and then control the side nozzles (551) to spray the upper and lower surfaces and outer sides of the flange simultaneously. S6. The main spraying group (4) moves along the guide rail (21) and sprays all parts of the pump casing. Then, the main spraying group (4) is adjusted back to its initial position, and the guide rail (21) is controlled to move away from the pump casing. Finally, the sprayed pump casing is removed.

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