Screw pump rotor anti-corrosion layer spraying device

Abstract

The invention relates to the field of coating spraying, in particular to a spraying device for an anticorrosive coating of a screw pump rotor. According to an existing device, the spraying distance is inconvenient to change according to the surface of a rotor during spraying, so that spraying is not uniform, undried paint is inconvenient to uniformly flow and distribute after spraying is completed, the paint is easy to sputter to the surface of the rotor due to the fact that the paint is sprayed to other objects, and the spraying quality is influenced. A screw pump rotor anti-corrosion layer spraying device comprises a bottom plate and the like. A supporting plate is fixedly connected to the bottom plate, a sliding rail is fixedly connected to the upper end of the supporting plate, an electric sliding frame is slidably connected to the sliding rail, and an electric push rod is fixedly connected to the electric sliding frame. As the rotor is of a spiral structure, the distance between the laser range finder and the surface of the rotor can change continuously, the electric push rod is controlled to stretch out and draw back, the distance between the electrostatic spray gun and the surface of the rotor is kept unchanged all the time, and the coating is sprayed more uniformly.

Description

Technical Field

[0001] The present invention relates to the field of coating spraying, and particularly relates to a coating spraying device for the anti-corrosion layer of a screw pump rotor. Background Technique

[0002] The single screw pump is a type of screw pump, which consists of a single screw (rotor) and a pump chamber (stator). The liquid is axially pushed by the eccentric rotation of the screw, and it is suitable for transporting high-viscosity, solid-particle-containing or corrosive media. It is widely used in fields such as chemical industry and environmental protection. The shape of the rotor is a single-head spiral structure with a circular cross-section. In order to meet the requirement of transporting corrosive media, an anti-corrosion coating is usually applied to the surface of the rotor.

[0003] However, the existing devices are not convenient to change the spraying distance according to the surface of the rotor during spraying, resulting in uneven spraying. After spraying, it is not convenient to make the undried paint flow evenly, and it is easy for the paint to splash onto the surface of the rotor due to being sprayed onto other objects, which affects the spraying quality. Summary of the Invention

[0004] Aiming at overcoming the shortcomings in the background technique, the present invention provides a coating spraying device for the anti-corrosion layer of a screw pump rotor that is more convenient to change the spraying distance, sprays more evenly, is convenient to make the undried paint flow evenly, and is not easy for the paint to splash onto the surface of the rotor.

[0005] The technical solution is as follows: A coating spraying device for the anti-corrosion layer of a screw pump rotor, including a bottom plate, a support plate is fixedly connected to the bottom plate, a slide rail is fixedly connected to the upper end of the support plate, an electric sliding frame is slidably connected to the slide rail, an electric push rod is fixedly connected to the electric sliding frame, the lower end of the telescopic rod of the electric push rod is fixedly connected to a fixing frame, an electrostatic spray gun is arranged on the fixing frame, a fixing mechanism is arranged on the bottom plate, the fixing mechanism is used to fix the rotor, and a moving spraying mechanism is arranged on the fixing mechanism, and the moving spraying mechanism is used to adaptively change the distance between the electrostatic spray gun and the rotor.

[0006] Optionally, the fixing mechanism includes two guide rails, both of the two guide rails are fixedly connected to the bottom plate, a moving frame one and a moving frame two are respectively slidably connected to the two guide rails, a fixing table is fixedly connected to the middle of the bottom plate, a threaded rotating rod is rotatably connected to the fixing table, threads are arranged at both ends of the threaded rotating rod, the thread directions at both ends of the threaded rotating rod are opposite, the threaded rotating rod is threadedly connected to both the moving frame one and the moving frame two, a rocker is fixedly connected to the side of the threaded rotating rod away from the moving frame two, a rotating top block one is rotatably connected to the moving frame one, and a rotating top block two is rotatably connected to the moving frame two.

[0007] Optionally, the mobile spraying mechanism includes a limited rotation rod, the limited rotation rod is rotatably connected to the mobile frame two, the limited rotation rod is slidably connected to a mobile rubber wheel, one side of the rotating top block two is fixedly connected to a fixed rubber wheel, the fixed rubber wheel contacts the mobile rubber wheel, the mobile frame two is fixedly connected to a support frame on a side close to the mobile frame one, the support frame is rotatably connected to a toothed disc and a bevel gear, the bevel gear meshes with the toothed disc, the lower part of the toothed disc is fixedly connected to a transmission gear, the bottom plate is fixedly connected to a guide rod, the guide rod is slidably connected to a rack, the rack meshes with the transmission gear, the lower part of the electric slide is fixedly connected to a connecting bent rod, the lower part of the connecting bent rod is connected to the rack, the connecting bent rod is fixedly connected to a laser rangefinder, the laser rangefinder is used to control the electric push rod, and the laser rangefinder is connected to the electric push rod through a wire.

[0008] Optionally, it also includes a speed changing mechanism, which is arranged on the movable frame two, and the speed changing mechanism is used to change the speed of the rotor rotation after the spraying is completed. The speed changing mechanism includes a reduction rubber wheel one, the reduction rubber wheel one is fixedly connected to one side of the movable rubber wheel, and the fixed rubber wheel is fixedly connected to one side of the fixed rubber wheel. A side rod is fixedly connected to the side of the movable frame two, and a toggle frame is slidably connected to the side rod. Two balls are rotatably connected to the toggle frame, and the two balls are respectively in contact with the two side surfaces of the movable rubber wheel, an iron plate is fixedly connected to one side of the toggle frame, a fork frame is fixedly connected to the lower part of the movable frame two, and two magnet blocks are fixedly connected to the upper part of the fork frame, one of the magnet blocks attracts the iron plate, and a push rod is fixedly connected to the rack, and protrusions are provided at both ends of the push rod, and the lower part of the toggle frame contacts with one of the protrusions on the push rod.

[0009] Optionally, an anti-splash mechanism is also included, which is arranged on the fixed frame, and is used to prevent paint from splashing onto the rotor surface. The anti-splash mechanism includes a servo motor, and the servo motor is fixedly connected to the lower part of the fixed frame. A rotating arm is fixedly connected to the output shaft of the servo motor, and a guide bucket is fixedly connected to the rotating arm. The guide bucket is hollow, and an infrared transmitter is fixedly connected to the lower part of the fixed frame. An infrared receiver one is fixedly connected to the movable frame one, and the infrared receiver one is used to control the start of the servo motor. An infrared receiver two is fixedly connected to the movable frame two, and the infrared receiver two is used to control the resetting of the servo motor.

[0010] The present invention has the following advantages: 1. Since the rotor is of a spiral structure, when the laser rangefinder moves horizontally and sweeps across the lower surface of the rotor, the distance between the laser rangefinder and the rotor surface will continuously change. When the distance between the laser rangefinder and the rotor surface becomes smaller, the electric push rod will extend, driving the electrostatic spray gun to move towards the upper surface of the rotor; when the distance between the laser rangefinder and the rotor surface becomes larger, the electric push rod will contract, driving the electrostatic spray gun to move towards the upper surface of the rotor. In this way, the distance between the electrostatic spray gun and the rotor surface remains constant all the time, making the coating spraying more uniform.

[0011] 2. When the electrostatic spray gun is closed and the electric carriage moves in the reverse direction to reset, the rotation of the moving rubber wheel will drive the rotation of the first reduction rubber wheel. The rotation of the first reduction rubber wheel will drive the rotation of the second rotation top block and the rotor through the second reduction rubber wheel. And under the reduction of the combination of the first reduction rubber wheel and the second reduction rubber wheel, the rotation speed of the rotor's self-rotation becomes slower. In this way, the rotor can rotate slowly after the coating is applied, making the undried paint distribute more evenly on the rotor surface.

[0012] 3. When the electrostatic spray gun moves horizontally, the infrared emitter also moves horizontally together. When the infrared emitter aligns with the first infrared receiver, the first infrared receiver is triggered and controls the start of the servo motor. The servo motor will drive the rotating arm and the guiding hopper to rotate by a certain angle, so that the guiding hopper is no longer located below the electrostatic spray gun. Then the electrostatic spray gun starts to spray downwards on the rotor surface. When the infrared emitter continues to move horizontally and aligns with the second infrared receiver, the second infrared receiver is triggered and controls the servo motor to close and reset. The servo motor drives the rotating arm and the guiding hopper to rotate by a certain angle to reset, so that the guiding hopper is again located below the electrostatic spray gun. At this time, the electrostatic spray gun just completely passes by the rotor. In this way, when the electrostatic spray gun moves horizontally within the set virtual position, it will not spatter onto the rotor surface due to the sprayed paint on other objects, improving the quality of the rotor coating. Description of the Drawings

[0013] Figure 1 It is a three-dimensional structure diagram of the present invention.

[0014] Figure 2 It is a three-dimensional structure diagram of the fixing mechanism of the present invention.

[0015] Figure 3 It is a separated three-dimensional structure diagram of the fixing mechanism of the present invention.

[0016] Figure 4 It is a three-dimensional structure diagram of the moving spraying mechanism of the present invention.

[0017] Figure 5 It is a partial three-dimensional structure diagram of the moving spraying mechanism of the present invention.

[0018] Figure 6It is a three-dimensional structural schematic diagram of the speed change mechanism of the present invention.

[0019] Figure 7 For the present invention Figure 6 Schematic diagram of the enlarged three-dimensional structure at point A in the middle.

[0020] Figure 8 It is a schematic diagram of the three-dimensional structure of the toggle frame and the ball bearing of the present invention.

[0021] Figure 9 It is a schematic diagram of the three-dimensional structure of the splash-proof mechanism of the present invention.

[0022] Figure 10 It is a schematic diagram of the cross-sectional three-dimensional structure of the guide bucket of the present invention.

[0023] The meanings of the reference numerals in the figure are as follows: 1: bottom plate, 2: support plate, 31: slide rail, 32: electric slide, 41: electric push rod, 42: fixed frame, 43: electrostatic spray gun, 51: guide rail, 52: mobile frame 1, 53: mobile frame 2, 54: fixed table, 55: threaded rotating rod, 56: rocker, 57: rotating top block 1, 58: rotating top block 2, 61: limit rotating rod, 62: mobile rubber wheel, 63: fixed rubber wheel, 64: support frame, 65: toothed disc, 66: 6: Bevel gear, 67: Transmission gear, 68: Guide rod, 69: Rack, 610: Connecting bent rod, 611: Laser rangefinder, 71: Deceleration rubber wheel one, 72: Deceleration rubber wheel two, 73: Side rod, 74: Toggle frame, 75: Ball, 76: Iron plate, 77: Fork frame, 78: Magnet block, 79: Top rod, 81: Servo motor, 82: Rotating arm, 83: Guide bucket, 84: Infrared transmitter, 85: Infrared receiver one, 86: Infrared receiver two. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. It is hereby stated that the directional terms such as up, down, left, right, front, back, inside, outside, etc. that appear or will appear in the text of the present invention are only based on the accompanying drawings of the present invention, and are not specific limitations of the present invention.

[0025] Example 1 A device for spraying an anti-corrosion layer on a screw pump rotor, such as Figures 1-10As shown in the figure, it includes a bottom plate 1. A support plate 2 is fixedly connected to the bottom plate 1. A slide rail 31 is fixedly connected to the upper end of the support plate 2. An electric sliding frame 32 is slidably connected to the slide rail 31. An electric push rod 41 is fixedly connected to the electric sliding frame 32. The lower end of the telescopic rod of the electric push rod 41 is fixedly connected to a fixing frame 42. An electrostatic spray gun 43 is arranged on the fixing frame 42. A fixing mechanism is arranged on the bottom plate 1. The fixing mechanism is used for fixing the rotor. A moving spraying mechanism is arranged on the fixing mechanism. The moving spraying mechanism is used for adaptively changing the distance between the electrostatic spray gun 43 and the rotor.

[0026] The fixing mechanism includes two guide rails 51. Both of the two guide rails 51 are fixedly connected to the bottom plate 1. A moving frame one 52 and a moving frame two 53 are respectively slidably connected to the two guide rails 51. A fixing table 54 is fixedly connected to the middle of the bottom plate 1. A threaded rotating rod 55 is rotatably connected to the fixing table 54. Threads are arranged at both ends of the threaded rotating rod 55. The thread directions at both ends of the threaded rotating rod 55 are opposite. The threaded rotating rod 55 is threadedly connected to both the moving frame one 52 and the moving frame two 53. A rocker 56 is fixedly connected to the side of the threaded rotating rod 55 away from the moving frame two 53. A rotating top block one 57 is rotatably connected to the moving frame one 52. A rotating top block two 58 is rotatably connected to the moving frame two 53.

[0027] The moving spraying mechanism includes a limiting rotating rod 61. The limiting rotating rod 61 is rotatably connected to the moving frame two 53. A moving rubber wheel 62 is slidably connected to the limiting rotating rod 61. A fixed rubber wheel 63 is fixedly connected to one side of the rotating top block two 58. The fixed rubber wheel 63 is in contact with the moving rubber wheel 62. A support frame 64 is fixedly connected to the side of the moving frame two 53 close to the moving frame one 52. A gear disc 65 and a bevel gear 66 are rotatably connected to the support frame 64. The bevel gear 66 is meshed with the gear disc 65. A transmission gear 67 is fixedly connected to the lower part of the gear disc 65. A guide rod 68 is fixedly connected to the bottom plate 1. A rack 69 is slidably connected to the guide rod 68. The rack 69 is meshed with the transmission gear 67. A connecting bent rod 610 is fixedly connected to the lower part of the electric sliding frame 32. The lower part of the connecting bent rod 610 is connected to the rack 69. A laser range finder 611 is fixedly connected to the connecting bent rod 610. The laser range finder 611 is used for controlling the electric push rod 41. The laser range finder 611 is connected to the electric push rod 41 through a wire.

[0028] In actual work, the rotor of a single-screw pump has a single-headed spiral structure with a circular cross-section. After production, an anti-corrosion coating needs to be sprayed on its surface. First, the operator places the rotor between the rotating top block 57 and the rotating top block 58, and aligns the shaft seat part of the rotor with the rotating top block 58. Then, the operator shakes the rocker 56. The rotation of the rocker 56 will drive the threaded rotating rod 55 to rotate together. The rotation of the threaded rotating rod 55 will drive the moving frame 52 and the moving frame 53 to move horizontally towards each other through the threads at both ends. Then, the moving frame 52 and the moving frame 53 clamp the rotor. After clamping and fixing the rotor, the operator starts the electrostatic spray gun 43 and the electric carriage 32. The electrostatic spray gun 43 sprays the paint downward. Then, the electric carriage 32 will drive the electric push rod 41 and the electrostatic spray gun 43 to move horizontally together. After starting, the electrostatic spray gun 43 will first move horizontally with the electric carriage 32 for a certain distance and then start spraying the surface of the rotor. When the electric carriage 32 moves horizontally, it will drive the connecting bent rod 610 to move together. The movement of the connecting bent rod 610 will drive the laser rangefinder 611 and the rack 69 to move horizontally together. Then, the horizontal movement of the rack 69 will drive the transmission gear 67 to rotate. The rotation of the transmission gear 67 will drive the bevel gear 66 to rotate rapidly through the gear disc 65. Then, the rotation of the bevel gear 66 will drive the limit rotating rod 61, the moving rubber wheel 62, and the fixed rubber wheel 63 to rotate together. Among them, the moving rubber wheel 62 and the fixed rubber wheel 63 are driven by friction, and the fixed rubber wheel 63 will drive the rotating top block 58 to rotate together. Since the rotating top block 58 and the rotating top block 57 have clamped and fixed the rotor, the rotation of the rotating top block 58 will also drive the rotating top block 57 and the rotor to rotate together. And due to the acceleration effect of the gear disc 65 on the bevel gear 66, the moving rubber wheel 62, and the fixed rubber wheel 63, when the electrostatic spray gun 43 moves horizontally, the rotor rotates rapidly, making the spraying of the coating on the rotor surface more comprehensive. When the fixed frame 42 drives the connecting bent rod 610 to move horizontally together, the connecting bent rod 610 will drive the laser rangefinder 611 to move horizontally together. The laser rangefinder 611 will move horizontally synchronously with the electrostatic spray gun 43. The laser rangefinder 611 will measure the distance from the rotor surface. Then, the laser rangefinder 611 will control the extension and contraction of the electric push rod 41 based on the measured distance from the rotor surface. When the laser rangefinder 611 moves horizontally and sweeps across the lower surface of the rotor, the distance between the laser rangefinder 611 and the rotor surface will change continuously. Since the rotor is a spiral structure, when the distance between the laser rangefinder 611 and the rotor surface becomes smaller, the electric push rod 41 will extend, driving the electrostatic spray gun 43 to move towards the upper surface of the rotor;When the distance between the laser rangefinder 611 and [the relevant object] increases, the electric push rod 41 will contract, driving the electrostatic spray gun 43 to move closer to the upper surface of the rotor. This ensures that the distance between the electrostatic spray gun 43 and the rotor surface remains constant, resulting in a more uniform coating spray. Then, when the electrostatic spray gun 43 has completely passed over the rotor, the electrostatic spray gun 43 will continue to move horizontally a certain distance along with the electric carriage 32. When the electric carriage 32 stops moving horizontally, the operator turns off the electrostatic spray gun 43. By setting a certain distance of virtual space before spraying, it is not easy to affect the spraying quality due to the uneven spraying of paint that may occur when the electrostatic spray gun 43 is turned off and on. Then, the electric carriage 32 moves horizontally in the reverse direction to reset.

[0029] Embodiment 2 Based on Embodiment 1, as Figures 6-8 shown, there is also a speed-changing mechanism. The speed-changing mechanism is arranged on the second moving frame 53. The speed-changing mechanism is used to change the rotation speed of the rotor after spraying is completed. The speed-changing mechanism includes a first deceleration rubber wheel 71. The first deceleration rubber wheel 71 is fixedly connected to one side of the moving rubber wheel 62. A second deceleration rubber wheel 72 is fixedly connected to one side of the fixed rubber wheel 63. A side rod 73 is fixedly connected to the side of the second moving frame 53. A shifting frame 74 is slidably connected to the side rod 73. Two ball bearings 75 are rotatably connected to the shifting frame 74. The two ball bearings 75 are respectively in contact with the two side surfaces of the moving rubber wheel 62. One side of the shifting frame 74 is fixedly connected to an iron plate 76. A fork frame 77 is fixedly connected to the lower part of the second moving frame 53. Two magnet blocks 78 are fixedly connected to the upper part of the fork frame 77. One of the magnet blocks 78 attracts the iron plate 76. A top rod 79 is fixedly connected to the rack 69. Protrusions are arranged at both ends of the top rod 79. The lower part of the shifting frame 74 is in contact with one of the protrusions on the top rod 79.

[0030] At first, when the electric carriage 32 drives the electrostatic spray gun 43 to spray the surface of the rotor, the horizontal movement of the electric carriage 32 will drive the rack 69 to move horizontally together. The horizontal movement of the rack 69 will drive the ejector rod 79 to move horizontally together. One of the protrusions on the ejector rod 79 will be disengaged from the toggle frame 77. When the electrostatic spray gun 43 has completely passed the rotor, the other protrusion on the ejector rod 79 will contact the toggle frame 77. Then, when the ejector rod 79 continues to move horizontally for a certain distance, it will squeeze and push the toggle frame 77 to move horizontally together. The horizontal movement of the toggle frame 77 for a certain distance will drive the moving rubber wheel 62 to move horizontally, and cause the moving rubber wheel 62 to be disengaged from the fixed rubber wheel 63. Then, the horizontal movement of the moving rubber wheel 62 will drive the first reduction rubber wheel 71 to move horizontally a certain distance in the direction close to the second reduction rubber wheel 72, so that the first reduction rubber wheel 71 contacts the second reduction rubber wheel 72. Through the frictional force, the first reduction rubber wheel 71 drives the second reduction rubber wheel 72 to rotate. When the electrostatic spray gun 43 is closed and the electric carriage 32 moves in the reverse direction to reset, the rotation of the moving rubber wheel 62 will drive the first reduction rubber wheel 71 to rotate. The rotation of the first reduction rubber wheel 71 will drive the rotating top block two 58 and the rotor to rotate together through the second reduction rubber wheel 72. And under the deceleration of the combination of the first reduction rubber wheel 71 and the second reduction rubber wheel 72, the rotation speed of the rotor's self-rotation becomes slower. In this way, the rotor can rotate slowly after the coating is applied, so that the undried paint can be more evenly distributed on the surface of the rotor.

[0031] Embodiment 3 On the basis of Embodiment 2, as Figures 9-10 shown, it further includes a splash-proof mechanism. The splash-proof mechanism is arranged on the fixed frame 42. The splash-proof mechanism is used to prevent the paint from splashing onto the surface of the rotor. The splash-proof mechanism includes a servo motor 81. The servo motor 81 is fixedly connected to the lower part of the fixed frame 42. A rotating arm 82 is fixedly connected to the output shaft of the servo motor 81. A guiding hopper 83 is fixedly connected to the rotating arm 82. The guiding hopper 83 is hollow. An infrared emitter 84 is fixedly connected to the lower part of the fixed frame 42. An infrared receiver one 85 is fixedly connected to the first moving frame 52. The infrared receiver one 85 is used to control the start of the servo motor 81. An infrared receiver two 86 is fixedly connected to the second moving frame 53. The infrared receiver two 86 is used to control the reset of the servo motor 81.

[0032] At first, the guiding hopper 83 is located directly below the electrostatic spray gun 43. When the electrostatic spray gun 43 is activated, the paint will change direction and be sprayed elsewhere through the guiding hopper 83. Then, when the electrostatic spray gun 43 moves horizontally, the infrared emitter 84 also moves horizontally along with it. When the infrared emitter 84 aligns with the first infrared receiver 85, the first infrared receiver 85 is triggered and controls the servo motor 81 to start. The servo motor 81 drives the rotating arm 82 and the guiding hopper 83 to rotate by a certain angle, so that the guiding hopper 83 is no longer located below the electrostatic spray gun 43. Then, the electrostatic spray gun 43 starts to spray downwards on the surface of the rotor. When the infrared emitter 84 continues to move horizontally and aligns with the second infrared receiver 86, the second infrared receiver 86 is triggered and controls the servo motor 81 to shut down and reset. The servo motor 81 drives the rotating arm 82 and the guiding hopper 83 to rotate by a certain angle to reset, so that the guiding hopper 83 is again located below the electrostatic spray gun 43. At this time, the electrostatic spray gun 43 just completely passes by the rotor. This can prevent the electrostatic spray gun 43 from splashing paint onto the rotor surface when moving horizontally within the set virtual position, thus improving the quality of the rotor coating.

[0033] The above are only embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification of the present invention, or directly or indirectly applied in other related technical fields, shall similarly be included within the patent protection scope of the present invention.

Claims

1. A spraying device for the anticorrosive layer of a screw pump rotor, characterized in that, It includes a bottom plate (1), a support plate (2) is fixedly connected to the bottom plate (1), a slide rail (31) is fixedly connected to the upper end of the support plate (2), an electric sliding frame (32) is slidably connected to the slide rail (31), an electric push rod (41) is fixedly connected to the electric sliding frame (32), a fixed frame (42) is fixedly connected to the lower end of the telescopic rod of the electric push rod (41), an electrostatic spray gun (43) is arranged on the fixed frame (42), a fixing mechanism is arranged on the bottom plate (1), the fixing mechanism is used for fixing the rotor, and a moving spraying mechanism is arranged on the fixing mechanism, and the moving spraying mechanism is used for adaptively changing the distance between the electrostatic spray gun (43) and the rotor.

2. The screw pump rotor anticorrosive layer spraying device according to claim 1, characterized in that, The fixing mechanism includes two guide rails (51), both of the two guide rails (51) are fixedly connected to the bottom plate (1), a moving frame one (52) and a moving frame two (53) are respectively slidably connected to the two guide rails (51), a fixed table (54) is fixedly connected to the middle of the bottom plate (1), a threaded rotating rod (55) is rotatably connected to the fixed table (54), threads are arranged at both ends of the threaded rotating rod (55), the threaded rotating rod (55) is in threaded connection with both the moving frame one (52) and the moving frame two (53), a rocker (56) is fixedly connected to the side of the threaded rotating rod (55) away from the moving frame two (53), a rotating top block one (57) is rotatably connected to the moving frame one (52), and a rotating top block two (58) is rotatably connected to the moving frame two (53).

3. A screw pump rotor anticorrosive coating spraying device according to claim 2, characterized in that, The thread directions at both ends of the threaded rotating rod (55) are opposite.

4. A screw pump rotor anticorrosion layer spraying device according to claim 2, characterized in that, The moving spraying mechanism includes a limiting rotating rod (61), the limiting rotating rod (61) is rotatably connected to the moving frame two (53), a moving rubber wheel (62) is slidably connected to the limiting rotating rod (61), a fixed rubber wheel (63) is fixedly connected to one side of the rotating top block two (58), the fixed rubber wheel (63) is in contact with the moving rubber wheel (62), a support frame (64) is fixedly connected to the side of the moving frame two (53) close to the moving frame one (52), a gear disk (65) and a bevel gear (66) are rotatably connected to the support frame (64), the bevel gear (66) is meshed with the gear disk (65), a transmission gear (67) is fixedly connected to the lower part of the gear disk (65), a guide rod (68) is fixedly connected to the bottom plate (1), a rack (69) is slidably connected to the guide rod (68), the rack (69) is meshed with the transmission gear (67), a connecting bent rod (610) is fixedly connected to the lower part of the electric sliding frame (32), the lower part of the connecting bent rod (610) is connected to the rack (69), a laser rangefinder (611) is fixedly connected to the connecting bent rod (610), the laser rangefinder (611) is used for controlling the electric push rod (41), and the laser rangefinder (611) is connected to the electric push rod (41) through a wire.

5. The screw pump rotor anticorrosive layer spraying device according to claim 4, characterized in that, It further includes a speed change mechanism, which is arranged on the second moving frame (53). The speed change mechanism is used to change the rotation speed of the rotor after spraying is completed. The speed change mechanism includes a first deceleration rubber wheel (71), and the first deceleration rubber wheel (71) is fixedly connected to one side of the moving rubber wheel (62). A second deceleration rubber wheel (72) is fixedly connected to one side of the fixed rubber wheel (63). A side rod (73) is fixedly connected to the side of the second moving frame (53). A toggle frame (74) is slidably connected to the side rod (73). Two ball bearings (75) are rotatably connected to the toggle frame (74), and the two ball bearings (75) are respectively in contact with the two side surfaces of the moving rubber wheel (62). An iron plate (76) is fixedly connected to one side of the toggle frame (74). A fork frame (77) is fixedly connected to the lower part of the second moving frame (53). Two magnet blocks (78) are fixedly connected to the upper part of the fork frame (77), and one of the magnet blocks (78) attracts the iron plate (76). A top rod (79) is fixedly connected to the rack (69).

6. The screw pump rotor anti-corrosion layer spraying device according to claim 5, characterized in that, Protrusions are provided at both ends of the top rod (79), and the lower part of the toggle frame (74) is in contact with one of the protrusions on the top rod (79).

7. A screw pump rotor anti-corrosion layer spraying device according to claim 5, characterized in that, It further includes a splash-proof mechanism, which is arranged on the fixed frame (42). The splash-proof mechanism is used to prevent the paint from splashing onto the surface of the rotor. The splash-proof mechanism includes a servo motor (81), and the servo motor (81) is fixedly connected to the lower part of the fixed frame (42). A rotating arm (82) is fixedly connected to the output shaft of the servo motor (81). A guiding hopper (83) is fixedly connected to the rotating arm (82). The guiding hopper (83) is hollow. An infrared emitter (84) is fixedly connected to the lower part of the fixed frame (42). An infrared receiver I (85) is fixedly connected to the first moving frame (52), and the infrared receiver I (85) is used to control the start of the servo motor (81). An infrared receiver II (86) is fixedly connected to the second moving frame (53), and the infrared receiver II (86) is used to control the reset of the servo motor (81).

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