Rust-proof treatment equipment and method for nodular cast iron water grate

Abstract

The invention provides rust-proof treatment equipment and method for a nodular cast iron water grate, and relates to the technical field of rust prevention of water grates. According to the anti-rust treatment equipment and method for the nodular cast iron water grate, the equipment comprises a box body, supporting foot stools, a conveying motor, a feeding opening and a discharging opening, and the supporting foot stools are fixedly installed at the bottom of the box body for supporting. According to the anti-rust treatment equipment for the nodular cast iron water grate, the inclined spray head performs inclined spraying and can rotate during spraying, so that the spraying angle is increased, the inner side walls of holes in the surface of the water grate can also be effectively sprayed, the covering effect of anticorrosive paint is improved, and the spraying quality is improved; and after spraying is conducted, the paint on the surface of the water grate is subjected to rolling brushing treatment in a rolling brushing mode, the coating on the surface of the water grate is smeared, anti-corrosion paint is flattened, compared with a mode only adopting spraying, the paint covering uniformity and adhesive force are improved, and therefore the service life of the water grate can be prolonged.

Description

Technical Field

[0001] This invention relates to the field of rust prevention technology for water grates, specifically to a rust prevention treatment device and method for ductile iron water grates. Background Technology

[0002] A water grate is a component of a drainage system, mainly used in drainage systems for roads, green spaces, and other places. Cast iron water grates are particularly widely used. However, cast iron water grates are prone to rusting due to rainwater erosion during use, so rust prevention treatment is required.

[0003] Utility model patent with publication number CN221245774U discloses a rust-preventive spray painting treatment device, including: a base plate, an L-shaped plate installed on one side of the top of the base plate, a clamping mechanism for rotating a metal pipe on one side of the L-shaped plate, and a blower mechanism at the top end of the L-shaped plate to accelerate the drying of the painted metal pipe. An annular box blows the paint sprayed on the pipe surface, which can speed up the drying of the paint, reduce waiting time, and thus improve the efficiency of spray painting. By setting a collection box, which is located directly below the spraying equipment, excess paint sprayed out drips into the collection box, reducing waste and avoiding pollution.

[0004] However, in the actual air jet processing, due to the many tiny pores on the surface of the grate, the coating coverage inside the pores is poor. Furthermore, by only using the outer spraying method, the coating adhesion to the grate surface is poor, which leads to the coating easily peeling off later and affects the service life of the grate. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides a rust prevention treatment device and method for ductile iron water grates, solving the problems of poor coating coverage inside holes and poor paint adhesion affecting service life.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the present invention provides the following technical solution: a rust prevention treatment device for ductile iron water grates, comprising a housing, a support frame, a transmission motor, a loading port, and a unloading port. The support frame is fixedly installed at the bottom of the housing for support. The transmission motor is fixedly installed on the front side wall of the housing. The loading port is located on the right side wall of the housing, and the unloading port is located on the left side wall of the housing. A transmission roller is rotatably mounted on the inner wall of the housing via bearings. The output end of the transmission motor passes through the housing and is fixedly installed on the front end of the transmission roller. A support wheel is fixedly installed on the outer wall of the transmission roller. A transmission belt is sleeved on the outer side of the support wheel, and a clamping device for clamping the water grate is provided on the outer side of the transmission belt.

[0009] Preferably, the clamping device includes a mounting base, an elastic clamping rod, a clamping seat, and a clamping slot. The mounting base is fixedly mounted to the surface of the conveyor belt. The elastic clamping rod is rotatably mounted to the mounting base via a bearing. The clamping seat is fixedly mounted to the front end of the elastic clamping rod. The clamping slot is formed on the side surface of the clamping seat away from the elastic clamping rod. The rear end of the elastic clamping rod passes through the mounting base.

[0010] Preferably, a flipping limiting device is fixedly installed on the rear inner wall of the housing. The flipping limiting device includes a limiting gear, a limiting frame, a first toothed row, a second toothed row, and a third toothed row. The limiting gear is fixedly installed on the rear end of the elastic clamping rod, and the limiting frame is fixedly installed on the rear inner wall of the housing. The top of the limiting frame extends below the limiting gear. The first toothed row, the second toothed row, and the third toothed row are all located on the top of the limiting frame. The first toothed row is located on the right side, the third toothed row is located on the left side, and the second toothed row is located in the middle. When the conveyor belt drives the clamping device to move to the left, the limiting gear will mesh with the first toothed row, the second toothed row, and the third toothed row in sequence.

[0011] Preferably, the interior of the housing is equipped with a spraying device, which includes a conveying pipe frame, an extension pipe seat, a rotating seat, and an inclined spray head. The conveying pipe frame is fixedly installed to the inner front wall of the housing, the front end of the conveying pipe frame passes through the housing and extends to the front side of the housing, and the front end of the conveying pipe frame is connected to the feeding pipe. The extension pipe seat is fixedly installed to the bottom of the conveying pipe frame. The rotating seat is rotatably installed to the bottom end of the extension pipe seat via a bearing. The inclined spray head is fixedly installed to the bottom of the rotating seat.

[0012] Preferably, a roller brush cylinder for brushing the surface of the water grate is provided on the left side of the internal parallel spraying device of the housing. The end of the roller brush cylinder is rotatably mounted to the inner wall of the housing via a bearing. A roller brush motor is fixedly mounted on the front side wall of the housing. The output end of the roller brush motor is fixedly mounted to the front end of the roller brush cylinder, and the roller brush cylinder is driven to rotate by the roller brush motor.

[0013] Preferably, a mounting crossbeam is fixedly installed on the inner wall of the box and at the position inside the conveyor belt. The mounting crossbeam is installed directly below the roller brush cylinder. A limit support plate is fixedly installed on the top of the mounting crossbeam by a bracket. An anti-jamming bracket is fixedly installed on the right end of the limit support plate.

[0014] Preferably, the two tilting nozzles are arranged in a group of two, with the two tilting nozzles installed in a staggered manner and tilting in opposite directions.

[0015] Preferably, there are two roller brush cylinders, which are respectively installed in the interval area between the first tooth row and the second tooth row and between the second tooth row and the third tooth row.

[0016] Preferably, the clamping slot has multiple slot sizes with different widths and thicknesses.

[0017] A method for rust prevention treatment of ductile iron water grates includes the following steps:

[0018] Step 1: Insert the water grate into the housing through the feed port. First, insert one end of the water grate into the clamping slot, then push the clamp to compress the elastic clamping rod. Next, insert the other end of the water grate into the clamping slot on the other side. After releasing the pressure on the elastic clamping rod, the elastic clamping rod returns to its original shape, thereby pushing the clamp to the center to clamp and fix the water grate. Then, the transmission motor drives the transmission roller to rotate, and the transmission roller drives the transmission belt through the support wheel to carry out the transmission work. The transmission belt drives the clamped water grate to move to the left through the clamping device.

[0019] Step 2: When the water grate moves to the bottom of the spraying device, the paint inside the spraying device enters the inclined nozzle through the extension tube seat and the rotating seat. It is then sprayed downwards through the inclined nozzle. At the same time, after spraying the paint, the inclined nozzle will drive the rotating seat to rotate under the reaction force. This allows the inclined nozzle to continuously change the spraying angle during spraying, improving the spraying coverage and preventing spraying dead corners. Meanwhile, the limiting gear meshes with the first gear row. When the elastic clamping rod drives the limiting gear to continue to move to the left, the limiting gear rotates under the restriction of the first gear row. The limiting gear drives the elastic clamping rod to rotate. The elastic clamping rod drives the water grate held by it to rotate through the clamping seat and clamping slot. Thus, the water grate is rotated while being sprayed, further improving the spraying coverage.

[0020] Step 3: After the limiting gear moves past the first tooth row, the grate stops rotating. As the grate continues to move to the left, it is blocked by the limiting support plate and the anti-jamming rod frame, causing the grate to deflect to a horizontal position. Then, the roller brush motor drives the roller brush cylinder to rotate, and the roller brush cylinder brushes the surface of the grate, smoothing the coating on the surface of the roller brush cylinder and improving the uniformity and adhesion of the spraying.

[0021] Step 4: The conveyor belt continues to rotate, flipping the grate over and then brushing the other side. Then, the grate surface is sprayed a second time using the spraying device on the left side. After the second spraying is completed, the conveyor belt continues to rotate, transporting the grate to a position near the discharge port. The sprayed grate can then be removed through the discharge port, completing the rust prevention treatment.

[0022] (III) Beneficial Effects

[0023] This invention provides a rust prevention treatment device and method for ductile iron water grates. It has the following beneficial effects:

[0024] 1. The tilting nozzle is used for tilting spraying and rotates during spraying, which increases the spraying angle and allows the inner walls of the holes on the surface of the water grate to be effectively sprayed, improving the coverage of the anti-corrosion coating and the quality of the spraying.

[0025] 2. After spraying, the paint on the surface of the grate is applied by roller brushing. The anti-corrosion paint is smoothed out. Compared with spraying alone, this method improves the uniformity and adhesion of the paint coverage, thereby extending the service life of the grate.

[0026] 3. It can be adapted to the clamping and spraying of water grates of different sizes, and no manual operation is required during the spraying process. The operator only needs to install and load the material and remove the sprayed water grate. It has high processing efficiency and is easy to use. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the present invention;

[0028] Figure 2 This is a schematic cross-sectional view of the present invention;

[0029] Figure 3 This is a schematic diagram of the clamping device structure of the present invention;

[0030] Figure 4 This is a schematic diagram of the flipping and limiting device of the present invention;

[0031] Figure 5 This is a schematic diagram of the spraying device of the present invention;

[0032] Figure 6 This is a schematic diagram of the installation structure of the limiting support plate of the present invention;

[0033] The components include: 1. Box body; 2. Support legs; 3. Transmission motor; 31. Transmission roller; 32. Support wheel; 33. Transmission belt; 4. Feed port; 41. Discharge port; 5. Clamping device; 51. Mounting base; 52. Elastic clamping rod; 53. Clamping seat; 54. Clamping slot; 6. Tilting limit device; 61. Limiting gear; 62. Limiting frame; 63. First toothed row; 64. Second toothed row; 65. Third toothed row; 7. Spraying device; 71. Conveying pipe rack; 72. Extension pipe seat; 73. Rotating seat; 74. Inclined spray head; 8. Roller brush cylinder; 81. Roller brush motor; 82. Mounting crossbeam; 83. Limiting support plate; 84. Anti-jamming rod frame. Detailed Implementation

[0034] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0035] Please see Figures 1-6 This invention provides a technical solution: a rust prevention treatment device for ductile iron water grates, comprising a housing 1, a support frame 2, a transmission motor 3, a loading port 4, and a unloading port 41. The support frame 2 is fixedly installed at the bottom of the housing 1 for support. The transmission motor 3 is fixedly installed on the front side wall of the housing 1. The loading port 4 is opened on the right side wall of the housing 1. The unloading port 41 for unloading is opened on the left side wall of the housing 1. A transmission roller 31 is rotatably installed on the inner wall of the housing 1 via bearings. The output end of the transmission motor 3 passes through the housing 1 and is fixedly installed on the front end of the transmission roller 31. A support wheel 32 is fixedly installed on the outer wall of the transmission roller 31. A transmission belt 33 is sleeved on the outer side of the support wheel 32. A clamping device 5 for clamping the water grate is provided on the outer side of the transmission belt 33. When the transmission motor 3 is started, the transmission motor 3 drives the support wheel 32 to rotate through the transmission roller 31. The support wheel 32 drives the transmission belt 33 to rotate. The clamping device 5 is moved through the transmission belt 33.

[0036] In this embodiment, the clamping device 5 includes a mounting base 51, an elastic clamping rod 52, a clamping seat 53, and a clamping slot 54. The mounting base 51 is fixedly mounted to the surface of the conveyor belt 33. The elastic clamping rod 52 is rotatably mounted to the mounting base 51 via a bearing. The clamping seat 53 is fixedly mounted to the front end of the elastic clamping rod 52. The clamping slot 54 is formed on the side surface of the clamping seat 53 away from the elastic clamping rod 52. The rear end of the elastic clamping rod 52 passes through the mounting base 51.

[0037] Specifically, during installation and clamping, the elastic clamping rod 52 is first compressed to increase the distance between the two clamping seats 53. Then, the water grate is placed between the two clamping seats 53. Subsequently, the compression of the elastic clamping rod 52 is released, and the elastic clamping rod 52 pushes the clamping seat 53 to move towards the center. The clamping seat 53 clamps and engages the water grate through the clamping slot 54, thus completing the clamping work.

[0038] In this embodiment, a flipping limiting device 6 is fixedly installed on the rear inner wall of the housing 1. The flipping limiting device 6 includes a limiting gear 61, a limiting frame 62, a first toothed row 63, a second toothed row 64, and a third toothed row 65. The limiting gear 61 is fixedly installed on the rear end of the elastic clamping rod 52. The limiting frame 62 is fixedly installed on the rear inner wall of the housing 1. The top of the limiting frame 62 extends below the limiting gear 61. The first toothed row 63, the second toothed row 64, and the third toothed row 65 are all located on the top of the limiting frame 62. The first toothed row 63 is located on the right side, the third toothed row 65 is located on the left side, and the second toothed row 64 is located in the middle. When the conveyor belt 33 drives the clamping device 5 to move to the left, the limiting gear 61 will mesh with the first toothed row 63, the second toothed row 64, and the third toothed row 65 in sequence.

[0039] Specifically, the top of the limiting frame 62 and the top of the conveyor belt 33 are parallel. The clamping device 5 drives the limiting gear 61 to move from right to left along the top of the limiting frame 62. The limiting gear 61, restricted by the first tooth row 63, drives the clamping device 5 to rotate. As the water grate held by the clamping device 5 passes under the spraying device 7, it rotates while being sprayed, thereby improving the uniformity of the spray coverage.

[0040] In this embodiment, a spraying device 7 is provided inside the housing 1. The spraying device 7 includes a conveying pipe frame 71, an extension pipe seat 72, a rotating seat 73, and an inclined nozzle 74. The conveying pipe frame 71 is fixedly installed on the inner front wall of the housing 1. The front end of the conveying pipe frame 71 passes through the housing 1 and extends to the front side of the housing 1. The front end of the conveying pipe frame 71 is connected to the feeding pipe. The extension pipe seat 72 is fixedly installed on the bottom of the conveying pipe frame 71. The rotating seat 73 is rotatably installed on the bottom end of the extension pipe seat 72 through a bearing. The inclined nozzle 74 is fixedly installed on the bottom of the rotating seat 73.

[0041] Specifically, the raw material inside the conveying pipe rack 71 enters the rotating seat 73 along the extension pipe seat 72, and then is sprayed downward through the inclined nozzle 74. The spraying device 7 is provided with two areas. By spraying twice, the uniformity of the spray coverage and the quality of the spray are improved, and the rust prevention performance is enhanced.

[0042] In this embodiment, a roller brush cylinder 8 for brushing the surface of the water grate is provided on the left side of the parallel spraying device 7 inside the housing 1. The end of the roller brush cylinder 8 is rotatably mounted to the inner wall of the housing 1 via a bearing. A roller brush motor 81 is fixedly mounted on the front side wall of the housing 1. The output end of the roller brush motor 81 is fixedly mounted to the front end of the roller brush cylinder 8, and the roller brush cylinder 8 is driven to rotate by the roller brush motor 81.

[0043] Specifically, the roller brush motor 81 drives the roller brush cylinder 8 to rotate, and the roller brush cylinder 8 performs roller brushing work on the water grate, thereby improving the uniformity of paint spraying and the adhesion of paint.

[0044] In this embodiment, a mounting frame 82 is fixedly installed on the inner wall of the housing 1 and at the position inside the conveyor belt 33. The mounting frame 82 is installed directly below the roller brush cylinder 8. A limit support plate 83 is fixedly installed on the top of the mounting frame 82 through a bracket. An anti-jamming bracket 84 is fixedly installed on the right end of the limit support plate 83.

[0045] Specifically, as the grate moves from right to left and passes the limiting support plate 83, the bottom of the grate is lifted by the blocking of the limiting support plate 83 and the anti-jamming rod bracket 84, causing the grate to deflect along the clamping device 5 to a near-horizontal state, which facilitates the operation of the roller brush.

[0046] In this embodiment, two tilting nozzles 74 are arranged as a group, and the two tilting nozzles 74 are installed in a staggered manner, with the tilting directions of the two tilting nozzles 74 being opposite.

[0047] Specifically, when the paint inside the tilting nozzle 74 is sprayed out at high speed, it generates a reverse thrust. This reverse thrust pushes the tilting nozzle 74 to drive the rotating seat 73 to rotate, thus enabling simultaneous spraying and rotation, increasing the spraying angle and improving the spraying quality.

[0048] In this embodiment, there are two roller brush cylinders 8, which are respectively installed in the interval area between the first tooth row 63 and the second tooth row 64 and between the second tooth row 64 and the third tooth row 65.

[0049] Specifically, when the clamping device 5 passes the position of the second tooth row 64, it engages with the limiting gear 61 through the second tooth row 64. The limiting gear 61 will drive the clamping device 5 to rotate half a turn after passing the second tooth row 64, thereby realizing the flipping of the water grate clamped by the clamping device 5, so that the roller brush 8 on the left side can brush the other side of the water grate.

[0050] In this embodiment, the clamping slot 54 has multiple slot sizes with different widths and thicknesses.

[0051] Specifically, it facilitates the clamping and processing of water grates of different thicknesses.

[0052] A method for rust prevention treatment of ductile iron water grates includes the following steps:

[0053] Step 1: Insert the water grate into the housing 1 through the feeding port 4. First, insert one end of the water grate into the clamping slot 54. Then, push the clamping seat 53 to compress the elastic clamping rod 52. Next, insert the other end of the water grate into the clamping slot 54 on the other side. After releasing the pressure applied to the elastic clamping rod 52, the elastic clamping rod 52 returns to its original shape. Thus, the elastic clamping rod 52 pushes the clamping seat 53 towards the middle to clamp and fix the water grate. Then, the transmission motor 3 drives the transmission roller 31 to rotate. The transmission roller 31 drives the transmission belt 33 through the support wheel 32 to carry out the transmission work. The transmission belt 33 drives the clamped water grate to move to the left through the clamping device 5.

[0054] Step 2: When the water grate moves below the spraying device 7, the paint inside the spraying device 7 enters the inclined nozzle 74 through the extension tube seat 72 and the rotating seat 73, and is sprayed downwards through the inclined nozzle 74. At the same time, after the inclined nozzle 74 sprays the paint, it will drive the rotating seat 73 to rotate under the reaction force, so that the inclined nozzle 74 continuously changes the spraying angle during spraying, which improves the spraying coverage effect and prevents the formation of spraying dead corners. Meanwhile, the limiting gear 61 meshes with the first gear row 63. When the elastic clamping rod 52 drives the limiting gear 61 to continue to move to the left, the limiting gear 61 rotates under the restriction of the first gear row 63. The limiting gear 61 drives the elastic clamping rod 52 to rotate. The elastic clamping rod 52 drives the clamped water grate to rotate through the clamping seat 53 and the clamping slot 54, so that the water grate is rotated while being sprayed, further improving the spraying coverage effect.

[0055] Step 3: After the limiting gear 61 moves past the first tooth row 63, the water grate stops rotating. Then, as the water grate continues to move to the left, it is blocked by the limiting support plate 83 and the anti-jamming rod bracket 84, causing the water grate to deflect to a horizontal position. Then, the roller brush motor 81 drives the roller brush cylinder 8 to rotate, and the roller brush cylinder 8 brushes the surface of the water grate, smoothing the coating on the surface of the roller brush cylinder 8, improving the uniformity and adhesion of the spraying.

[0056] Step 4: Then the conveyor belt continues to rotate, flips the grate over, and then rolls and brushes the other side. Then, the spraying device 7 on the left side sprays the surface of the grate a second time. After the second spraying is completed, the conveyor belt 33 continues to rotate to transport the grate to a position close to the discharge port 41. Then, the sprayed grate can be removed through the discharge port 41 to complete the rust prevention treatment.

[0057] The working principle and usage process of this invention are as follows: The water grate is inserted into the housing 1 through the feeding port 4. First, one end of the water grate is inserted into the clamping slot 54. Then, the clamping seat 53 is pushed to compress the elastic clamping rod 52. Next, the other end of the water grate is inserted into the clamping slot 54 on the other side. After releasing the pressure applied to the elastic clamping rod 52, the elastic clamping rod 52 returns to its original shape, thereby pushing the clamping seat 53 towards the center to clamp and fix the water grate. Then, the transmission motor 3 drives the transmission roller 31 to rotate. The transmission roller 31 drives the transmission belt 33 through the support wheel 32 for transmission. The transmission belt 33, through the clamping device 5, moves the clamped water grate to the left. When the water grate moves below the spraying device 7, the spraying device 7... The paint enters the inclined nozzle 74 through the extension tube seat 72 and the rotating seat 73, and is sprayed downwards through the inclined nozzle 74. Simultaneously, after spraying the paint, the inclined nozzle 74, under the reaction force, drives the rotating seat 73 to rotate, thus constantly changing the spraying angle during spraying, improving the coverage and preventing spraying dead zones. Meanwhile, the limiting gear 61 meshes with the first gear row 63. When the elastic clamping rod 52 drives the limiting gear 61 to continue moving to the left, the limiting gear 61 rotates under the constraint of the first gear row 63. The limiting gear 61 drives the elastic clamping rod 52 to rotate, and the elastic clamping rod 52, through the clamping seat 53 and the clamping slot 54, drives the clamped water grate to rotate, thereby pressing the water grate... While spraying, the rotating seat 73 rotates, allowing it to spray the grate at different angles, further improving the coating coverage. After the limiting gear 61 moves past the first toothed row 63, the grate stops rotating. As the grate continues to move to the left, it is blocked by the limiting support plate 83 and the anti-jamming rod bracket 84, causing the grate to deflect to a horizontal position. Then, the roller brush motor 81 drives the roller brush cylinder 8 to rotate, which brushes the surface of the grate and smooths the coating on the surface of the roller brush cylinder 8. As the clamping device 5 continues to move to the left, the limiting gear 61 meshes with the second toothed row 64. Under the restriction of the second toothed row 64, the limiting gear 61 rotates 180°. The limiting gear 61 is connected by the elastic clamping rod 52, the clamping seat 53, and the clamping device 54. The gripper slot 54 engages to rotate the water grate, causing the side not yet brushed to rise to the upper position. Then, the conveyor belt 33 drives the clamping device 5 to continue moving to the left. When the water grate reaches below the left-side brush cylinder 8, the unbrushed side of the water grate is brushed, improving the uniformity and adhesion of the coating. The conveyor belt 33 then drives the water grate further to the left until it reaches the position of the third toothed row 65. The third toothed row 65 has the same structural principle as the first toothed row 63. The clamping device 5 rotates the water grate due to the constraint of the third toothed row 65, simultaneously cooperating with the spraying device 7 above to perform a second coating. After the second coating is completed, the conveyor belt 33 and the clamping device 5 transport the water grate to the left-side position.The water grate, clamped inside the clamping device 5, is removed through the discharge port 41, thus completing the rust prevention treatment.

[0058] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rust prevention treatment device for ductile iron water grate, comprising a housing (1), a support frame (2), a transmission motor (3), a loading port (4), and a unloading port (41), wherein the support frame (2) is fixedly installed at the bottom of the housing (1) for support, the transmission motor (3) is fixedly installed on the front side wall of the housing (1), the loading port (4) is opened on the right side wall of the housing (1), and the unloading port (41) for unloading is opened on the left side wall of the housing (1), characterized in that: The inner wall of the housing (1) is rotatably mounted with a transmission roller (31) via a bearing. The output end of the transmission motor (3) passes through the housing (1) and is fixedly mounted with the front end of the transmission roller (31). The outer wall of the transmission roller (31) is fixedly mounted with a support wheel (32). A transmission belt (33) is sleeved on the outer side of the support wheel (32). A clamping device (5) for clamping the water grate is provided on the outer side of the transmission belt (33).

2. The rust prevention treatment equipment for ductile iron water grates according to claim 1, characterized in that: The clamping device (5) includes a mounting base (51), an elastic clamping rod (52), a clamping seat (53), and a clamping slot (54). The mounting base (51) is fixedly mounted to the surface of the conveyor belt (33). The elastic clamping rod (52) is rotatably mounted to the mounting base (51) via a bearing. The clamping seat (53) is fixedly mounted to the front end of the elastic clamping rod (52). The clamping slot (54) is opened on the side surface of the clamping seat (53) away from the elastic clamping rod (52). The rear end of the elastic clamping rod (52) passes through the mounting base (51).

3. The rust prevention treatment equipment for ductile iron water grates according to claim 2, characterized in that: A flipping limiting device (6) is fixedly installed on the rear inner wall of the housing (1). The flipping limiting device (6) includes a limiting gear (61), a limiting frame (62), a first gear row (63), a second gear row (64), and a third gear row (65). The limiting gear (61) is fixedly installed at the rear end of the elastic clamping rod (52). The limiting frame (62) is fixedly installed on the rear inner wall of the housing (1). The top of the limiting frame (62) extends below the limiting gear (61). The first toothed rack (63), the second toothed rack (64), and the third toothed rack (65) are all located on the top of the limiting frame (62). The first toothed rack (63) is located on the right side, the third toothed rack (65) is located on the left side, and the second toothed rack (64) is located in the middle. When the conveyor belt (33) drives the clamping device (5) to move to the left, the limiting gear (61) will mesh with the first toothed rack (63), the second toothed rack (64), and the third toothed rack (65) in sequence.

4. The rust prevention treatment equipment for ductile iron water grates according to claim 3, characterized in that: The interior of the housing (1) is equipped with a spraying device (7). The spraying device (7) includes a conveying pipe frame (71), an extension pipe seat (72), a rotating seat (73), and an inclined nozzle (74). The conveying pipe frame (71) is fixedly installed on the inner front wall of the housing (1). The front end of the conveying pipe frame (71) passes through the housing (1) and extends to the front side of the housing (1). The front end of the conveying pipe frame (71) is connected to the feeding pipe. The extension pipe seat (72) is fixedly installed on the bottom of the conveying pipe frame (71). The rotating seat (73) is rotatably installed on the bottom end of the extension pipe seat (72) through a bearing. The inclined nozzle (74) is fixedly installed on the bottom of the rotating seat (73).

5. The rust prevention treatment equipment for ductile iron water grates according to claim 4, characterized in that: Inside the housing (1), on the left side of the parallel spraying device (7), there is a roller brush cylinder (8) for roller brushing the surface of the water grate. The end of the roller brush cylinder (8) is rotatably mounted to the inner wall of the housing (1) via a bearing. A roller brush motor (81) is fixedly mounted on the front side wall of the housing (1). The output end of the roller brush motor (81) is fixedly mounted to the front end of the roller brush cylinder (8). The roller brush cylinder (8) is driven to rotate by the roller brush motor (81).

6. The rust prevention treatment equipment for ductile iron water grates according to claim 5, characterized in that: An installation crossbeam (82) is fixedly installed on the inner wall of the box (1) and on the inner side of the conveyor belt (33). The installation crossbeam (82) is installed directly below the roller brush cylinder (8). A limit support plate (83) is fixedly installed on the top of the installation crossbeam (82) by a bracket. An anti-jamming bracket (84) is fixedly installed on the right end of the limit support plate (83).

7. The rust prevention treatment equipment for ductile iron water grates according to claim 6, characterized in that: The tilting nozzles (74) are arranged in pairs, with the two tilting nozzles (74) installed in a staggered manner, and the tilting directions of the two tilting nozzles (74) are opposite.

8. The rust prevention treatment equipment for ductile iron water grates according to claim 7, characterized in that: There are two roller brush cylinders (8), which are respectively installed in the interval area between the first tooth row (63) and the second tooth row (64) and the second tooth row (64) and the third tooth row (65).

9. The rust prevention treatment equipment for ductile iron water grates according to claim 8, characterized in that: The clamping slot (54) has multiple slot sizes with different widths and thicknesses.

10. A method for treating rust on a ductile iron water grate, comprising the rust-prevention treatment equipment for a ductile iron water grate as described in claim 9, characterized in that, Includes the following steps: Step 1: Insert the water grate into the box (1) through the feeding port (4). First, insert one end of the water grate into the clamping slot (54). Then, push the clamp (53) to compress the elastic clamping rod (52). Then, insert the other end of the water grate into the clamping slot (54) on the other side. After releasing the pressure applied to the elastic clamping rod (52), the elastic clamping rod (52) returns to its original shape. Thus, the clamping rod (52) pushes the clamp (53) towards the middle to clamp the water grate and fix it. Then, the transmission motor (3) drives the transmission roller (31) to rotate. The transmission roller (31) drives the transmission belt (33) to perform transmission work through the support wheel (32). The transmission belt (33) drives the clamped water grate to move to the left through the clamping device (5). Step 2: When the water grate moves below the spraying device (7), the paint inside the spraying device (7) enters the inclined nozzle (74) through the extension tube seat (72) and the rotating seat (73), and is sprayed downwards through the inclined nozzle (74). At the same time, after spraying the paint, the inclined nozzle (74) will drive the rotating seat (73) to rotate under the reaction force, so that the inclined nozzle (74) continuously changes the spraying angle during spraying, which improves the coverage effect of the spraying and prevents spraying defects. In the dead corner, the limiting gear (61) meshes with the first gear row (63). When the elastic clamping rod (52) drives the limiting gear (61) to continue to move to the left, the limiting gear (61) rotates under the restriction of the first gear row (63). The limiting gear (61) drives the elastic clamping rod (52) to rotate. The elastic clamping rod (52) drives the clamped water grate to rotate through the clamping seat (53) and the clamping slot (54), so that the water grate is rotated while being sprayed, further improving the spraying coverage effect. Step 3: After the limiting gear (61) moves past the first tooth row (63), the water grate stops rotating. Then, as the water grate continues to move to the left, it is blocked by the limiting support plate (83) and the anti-jamming rod bracket (84), causing the water grate to deflect to a horizontal position. Then, the roller brush motor (81) drives the roller brush cylinder (8) to rotate. The roller brush cylinder (8) is used to brush the surface of the water grate, smoothing the coating on the surface of the roller brush cylinder (8) and improving the uniformity and adhesion of the spraying. Step 4: Then continue the transmission, flip the water grate over and then roll it on the other side. Then, spray the surface of the water grate a second time through the spraying device (7) on the left side. After the second spraying is completed, the conveyor belt (33) continues to rotate to transport the water grate to a position close to the discharge port (41). Then, the sprayed water grate can be removed through the discharge port (41) to complete the rust prevention treatment.

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