A supporting wheel device for spraying anticorrosive paint on the outer wall of nodular cast iron pipe

Abstract

The present disclosure relates to the technical field of roller device, and one embodiment of the present disclosure provides a roller device for spraying anticorrosive paint on the outer wall of nodular cast iron pipe, which comprises a bottom plate, the upper side of the bottom plate is provided with a supporting frame, further comprises a mounting plate, a mounting frame, an adjusting assembly, a rotating seat, a roller, a chain wheel, a supporting frame, a limiting sleeve, a clamping seat, a clamping plate and a clamping mechanism. Through the cooperation between the mounting plate, the mounting frame and the adjusting mechanism, the synchronous expansion or contraction of the two mounting frames on the mounting plate is realized, thereby realizing the adjustment of the distance between the multiple rotating seats installed in the mounting frame and the multiple rollers installed on the rotating seat. Through the above technical scheme, the technical problem that the roller device in the prior art is generally fixed in structure and is difficult to realize the lifting of multiple nodular cast iron pipes with different lengths, so that the overall structure of the roller device needs to be replaced when spraying anticorrosive paint on nodular cast iron pipes with different lengths is required.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the field of roller support device technology, and more specifically, to a roller support device for spraying anti-corrosion paint onto the outer wall of ductile iron pipes. Background Technology

[0002] Ductile iron pipes are pipes made by centrifugally casting molten iron of grade 18 or higher using a centrifugal casting machine with the addition of a spheroidizing agent. They are also commonly referred to as ductile iron pipes or ductile cast iron pipes. Primarily used for water supply, they are an ideal material for water pipes. After processing, anti-corrosion paint is applied to the outer wall of the ductile iron pipe to enhance its corrosion resistance. A roller support device is used during this process. This device mainly consists of a roller assembly, a support mechanism, and a transmission mechanism. The roller assembly is directly formed from the ductile iron casting... The iron pipe contact is used to lift and move the ductile iron pipe forward. The support mechanism is used to support the roller assembly. The height and spacing of the support mechanism are determined according to the layout of the spraying equipment and the diameter of the ductile iron pipe. The transmission mechanism is the power source of the roller assembly and is used to drive the roller assembly to run. When spraying anti-corrosion paint on the outer wall of the ductile iron pipe placed on the roller assembly, the transmission mechanism starts and drives the roller assembly to rotate slowly. The roller assembly drives the ductile iron pipe to rotate slowly forward. During the slow rotation of the ductile iron pipe, the spraying equipment sprays anti-corrosion paint onto the outer wall of the ductile iron pipe. Existing roller devices typically have a fixed structure, which means they can only support ductile iron pipes of a single length and cannot support multiple ductile iron pipes of different lengths. As a result, when it is necessary to spray anti-corrosion paint on the outer wall of ductile iron pipes of different lengths, the entire structure of the roller device needs to be replaced, making it quite inconvenient to use. Utility Model Content

[0003] To overcome the above-mentioned defects, the embodiments of this disclosure provide a roller support device for spraying anti-corrosion paint on the outer wall of ductile iron pipes. This device solves the technical problem that existing roller support devices typically have a fixed structure, making it difficult to support multiple ductile iron pipes of different lengths. Consequently, when anti-corrosion paint needs to be sprayed on ductile iron pipes of different lengths, the entire structure of the roller support device needs to be replaced.

[0004] According to one aspect, at least one embodiment of this disclosure provides a roller support device for spraying anti-corrosion paint onto the outer wall of ductile iron pipes, including a base plate, a support frame mounted on the upper side of the base plate, and further including a mounting plate, mounting frames, an adjusting assembly, a rotating seat, a roller support, a sprocket, a support frame, a limiting sleeve, a snap-fit ​​seat, a snap-fit ​​plate, and a snap-fit ​​mechanism. The mounting plate is mounted on the upper side of the support frame, and two mounting frames are sleeved on the mounting plate. The mounting frames are movable along the mounting plate. The adjusting assembly is disposed on the support frame for synchronously adjusting the positions of the two mounting frames on the mounting plate. A plurality of... The rotating seat has a support roller sleeved on its outer side, and a sprocket sleeved on one of the two sides of the rotating seat. Multiple sprockets are connected by chain drive. The support frame is installed on the upper side of the mounting plate. Multiple limiting sleeves are movably installed on the top of the support frame. The mounting frame on one of the two sides has a snap-fit ​​seat installed on both sides. The snap-fit ​​seat moves synchronously with the mounting frame. The mounting frame on one of the two sides has a snap-fit ​​plate installed on both sides. The snap-fit ​​plate is inserted into the snap-fit ​​seat. The snap-fit ​​mechanism is set inside the snap-fit ​​seat for snap-fit ​​fixing of the snap-fit ​​seat and the snap-fit ​​plate.

[0005] The adjustment assembly includes an electric push rod, a transmission seat, a U-shaped rod, and a connecting plate. Electric push rods are provided on both sides of the bottom wall of the support frame. The transmission seat is installed on the telescopic end of the electric push rod and moves synchronously with the telescopic end of the electric push rod. The U-shaped rod is installed on the lower side of the mounting frame. The connecting plate is sleeved on the transmission seat and the U-shaped rod. The transmission seat is connected to the two U-shaped rods through the two connecting plates.

[0006] As a preferred embodiment of the roller support device for spraying anti-corrosion paint on the outer wall of ductile iron pipe according to the present invention, in order to limit the movement of the transmission seat and ensure the stability of the transmission seat during movement, limit slide rails are installed on both sides of the inner wall of the support frame, and the transmission seat is slidably connected to the limit slide rails.

[0007] As a preferred embodiment of the roller support device for spraying anti-corrosion paint on the outer wall of ductile iron pipe according to the present invention, in order to ensure the stability of the multiple rotating seats during rotation and movement, multiple auxiliary supports are installed on the upper side of the mounting frame, and the multiple auxiliary supports are sleeved on the outer side of the corresponding rotating seats for auxiliary support of the rotating seats.

[0008] The locking mechanism includes an adjusting rod, a transmission plate, a locking block, and a spring. The adjusting rod is inserted into the upper side of the locking seat and can move inside the locking seat. The transmission plate is installed at the bottom end of the adjusting rod and moves synchronously with the adjusting rod. The locking block is installed on the lower side of the transmission plate and moves synchronously with the transmission plate. The spring is sleeved on the adjusting rod, and both ends of the spring are connected to the locking seat and the transmission plate, respectively.

[0009] As a preferred embodiment of the roller device for spraying anti-corrosion paint on the outer wall of ductile iron pipe according to the present invention, in order to achieve the snap-fit ​​fixing between the snap-fit ​​block and the snap-fit ​​plate, the upper side of the snap-fit ​​plate is provided with multiple snap-fit ​​grooves, and the width of the snap-fit ​​grooves is adapted to the width of the snap-fit ​​block.

[0010] As a preferred embodiment of the roller support device for spraying anti-corrosion paint on the outer wall of ductile iron pipe according to the present invention, in order to realize the movement limit of the mounting frame and ensure the stability of the mounting frame during movement, multiple guide posts are installed on both sides of the support frame, and limit plates are sleeved on the guide posts. The upper side of the limit plate is connected to the lower side of the mounting frame.

[0011] As a preferred embodiment of the roller device for spraying anti-corrosion paint on the outer wall of ductile iron pipe according to the present invention, in order to achieve synchronous rotation of the two rotating seats inside the limiting sleeve, square clamping plates are installed on both sides of the inner wall of the limiting sleeve, and two square clamping grooves are opened on the outer side of the rotating seats.

[0012] The beneficial effects of the embodiments disclosed herein are as follows: In this disclosure, the synchronous expansion or contraction of the two mounting frames on the mounting plate is achieved through the cooperation between the mounting plate, the mounting frame and the adjustment mechanism, thereby realizing the adjustment of the distance between the multiple rotating seats installed inside the mounting frame and the multiple support rollers installed on the rotating seats. This enables the support roller device to support multiple ductile iron pipes of different lengths, increasing the applicability of the support roller device. In this disclosure, the cooperation between the snap-fit ​​seat, the snap-fit ​​plate and the snap-fit ​​mechanism realizes the snap-fit ​​fixation of the two mounting frames after expansion or contraction, thereby realizing the snap-fit ​​positioning after the position of the support roller is adjusted, ensuring the stability of the support roller after the position is adjusted, and ensuring the lifting effect of the support roller on the ductile iron pipe. In this disclosure, by setting a limiting sleeve, the synchronous rotation of two rotating seats set inside the limiting sleeve is realized, so that the adjusted multiple rotating seats can rotate synchronously under the drive of the limiting sleeve, sprocket and chain, and the multiple support rollers can rotate synchronously and slowly to lift and transport the ductile iron pipe, thus ensuring the stability of the ductile iron pipe during the transportation process. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of the support frame, mounting plate, mounting frame and adjustment mechanism when they are in cooperation in this utility model; Figure 3 This is a vertical sectional view of the internal structure of the mounting frame and limiting sleeve of this utility model; Figure 4 This is a vertical sectional view of the internal structure of the card connector in this utility model.

[0015] In the diagram: 1. Base plate; 2. Support frame; 3. Mounting plate; 4. Mounting frame; 5. Rotating seat; 6. Support roller; 7. Sprocket; 8. Support frame; 9. Limiting sleeve; 10. Snap-fit ​​seat; 11. Snap-fit ​​plate; 12. Auxiliary support; 101. Electric actuator; 102. Transmission base; 103. U-shaped rod; 104. Connecting plate; 201. Adjusting rod; 202. Transmission plate; 203. Snap-fit ​​block; 204. Spring. Detailed Implementation

[0016] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0017] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0018] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0019] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0020] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0021] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] like Figures 1-4 As shown, it illustrates a roller support device for spraying anti-corrosion paint on the outer wall of ductile iron pipe according to an embodiment of the present disclosure, including a base plate 1, a support frame 2 installed on the upper side of the base plate 1, and also including a mounting plate 3, a mounting frame 4, an adjustment component, a rotating seat 5, a roller support 6, a sprocket 7, a support frame 8, a limiting sleeve 9, a snap-fit ​​seat 10, a snap-fit ​​plate 11, and a snap-fit ​​mechanism; In this embodiment, the synchronous expansion or contraction of the two mounting frames 4 on the mounting plate 3 is achieved through the cooperation between the mounting plate 3, the mounting frame 4 and the adjustment mechanism, thereby realizing the adjustment of the distance between the multiple rotating seats 5 installed inside the mounting frame 4 and the multiple support rollers 6 installed on the rotating seats 5. This enables the support roller device to support multiple ductile iron pipes of different lengths, increasing the applicability of the support roller device. In this embodiment, the cooperation between the snap-fit ​​seat 10, the snap-fit ​​plate 11 and the snap-fit ​​mechanism realizes the snap-fit ​​fixation of the two mounting frames 4 after expansion or contraction, thereby realizing the snap-fit ​​positioning of the support roller 6 after position adjustment, ensuring the stability of the support roller 6 after position adjustment, and ensuring the lifting effect of the support roller 6 on the ductile iron pipe. In this embodiment, by setting a limiting sleeve 9, the synchronous rotation of the two rotating seats 5 set inside the limiting sleeve 9 is realized, so that the adjusted multiple rotating seats 5 can rotate synchronously under the drive of the limiting sleeve 9, sprocket 7 and chain, so that multiple support rollers 6 can rotate synchronously and slowly to lift and transport the ductile iron pipe, ensuring the stability of the ductile iron pipe during the transportation process.

[0023] In this embodiment, the support roller device is located below the spraying equipment. When the support roller device lifts and transports the ductile iron pipe, the rotating support roller 6 will drive the ductile iron pipe to rotate slowly during the transport process. The spraying equipment located above the support roller device sprays anti-corrosion paint onto the outer wall of the ductile iron pipe. like Figure 2 and Figure 3As shown, the mounting plate 3 is installed on the upper side of the support frame 2. Two mounting frames 4 are sleeved on the mounting plate 3. Multiple guide posts are installed on both sides of the support frame 2. Limiting plates are sleeved on the guide posts. The upper side of the limiting plates is connected to the lower side of the mounting frames 4. The guide posts can limit the mounting frames 4 through the limiting plates, thereby ensuring the stability of the two mounting frames 4 when expanding or contracting. The mounting frames 4 can move along the mounting plate 3. An adjustment component is set on the support frame 2 for synchronous adjustment of the positions of the two mounting frames 4 on the mounting plate 3. The adjustment component includes an electric push rod 101, a transmission seat 102, a U-shaped rod 103, and a connecting plate 104. Electric push rods 101 are provided on both sides of the inner bottom wall of the support frame 2. The transmission seat 102 is installed on the telescopic end of the electric push rod 101. The transmission seat 102 moves synchronously with the telescopic end of the electric push rod 101. Two mounting rods are installed on the transmission seat 102, and a U-shaped rod 103 is installed on the lower side of the mounting frame 4. A connecting plate 104 is sleeved on the mounting rods and U-shaped rod 103 in the transmission seat 102. The transmission seat 102 is connected to the two U-shaped rods 103 via the two connecting plates 104. Limiting slide rails are installed on both sides of the inner wall of the support frame 2. The transmission seat 102 is slidably connected to the limiting slide rails, which limit the movement of the transmission seat 102, thus ensuring its stability during movement. When the transmission seat 102 rises or falls, it can drive the mounting frame 4 to expand or contract synchronously on the mounting plate 3 via the U-shaped rod 103 and the connecting plate 104. Multiple rotating seats 5 are mounted on the side. A driving component, a forward and reverse motor, is installed on one of the mounting frames 4 on one side to drive the rotation of one of the rotating seats 5. Multiple auxiliary supports 12 are mounted on the upper side of the mounting frame 4, and these supports 12 are sleeved on the outer side of the corresponding rotating seat 5 to provide auxiliary support. A rotating ring is sleeved on the outer side of the rotating seat 5 and is located inside the auxiliary support 12. Therefore, the different levels of support provided by the auxiliary supports 12 affect the normal rotation of the rotating seat 5. The auxiliary supports 12 provide auxiliary support for the rotating seat 5, thus ensuring the stability of the rotating seat 5 during movement or rotation. Rollers 6 are sleeved on the outer side of the rotating seat 5. A sprocket 7 is fitted onto the mounting plate 3. Multiple sprockets 7 are connected via chain drive. A support frame 8 is mounted on the upper side of the mounting plate 3. Multiple limiting sleeves 9 are movably mounted on the top of the support frame 8. A slot is opened in the middle of the outer side of the limiting sleeve 9. The support frame 8 limits the limiting sleeve 9 through the slot. Square clamping plates are installed on both sides of the inner wall of the limiting sleeve 9. Two square clamping slots are opened on the outer side of the rotating seat 5. When the rotating seat 5 located on one side of the limiting sleeve 9 rotates, the rotating seat 5 drives the limiting sleeve 9 to rotate through the square clamping slots and square clamping plates. The limiting sleeve 9 drives the rotating seat 5 on the other side to rotate synchronously through the square clamping slots and square clamping blocks. Both sides of the mounting frame 4 on one side of the two sides are equipped with locking seats 10. The locking seats 10 move synchronously with the mounting frame 4.Both sides of the mounting frame 4 on one side are equipped with snap-fit ​​plates 11, which are inserted into the snap-fit ​​base 10. Figure 4 As shown, a snap-fit ​​mechanism is disposed inside the snap-fit ​​seat 10 for snap-fitting and fixing the snap-fit ​​seat 10 and the snap-fit ​​plate 11. The snap-fit ​​mechanism includes an adjusting rod 201, a transmission plate 202, a snap-fit ​​block 203, and a spring 204. The adjusting rod 201 is inserted into the upper side of the snap-fit ​​seat 10 and can move inside the snap-fit ​​seat 10. The transmission plate 202 is installed at the bottom end of the adjusting rod 201 and moves synchronously with the adjusting rod 201. The snap-fit ​​block 203 is installed on the lower side of the transmission plate 202 and moves synchronously with the transmission plate 202. The spring 204 is sleeved on the... On the adjusting rod 201, the two ends of the spring 204 are connected to the snap-fit ​​seat 10 and the transmission plate 202 respectively. The upper side of the snap-fit ​​plate 11 is provided with multiple snap-fit ​​grooves. The width of the snap-fit ​​grooves is adapted to the width of the snap-fit ​​block 203. The snap-fit ​​block 203 snaps with the snap-fit ​​plate 11 through the snap-fit ​​grooves, thereby realizing the snap-fit ​​fixation between the snap-fit ​​seat 10 and the snap-fit ​​plate 11. The number of snap-fit ​​grooves opened on the snap-fit ​​plate 11 is limited. Therefore, this roller device can lift multiple ductile iron pipes of different lengths, but it cannot lift ductile iron pipes of all lengths.

[0024] Working principle: The roller support device is installed inside the factory building, directly below the spraying equipment. Before using the roller support device, the equipment is tested to ensure it is operating normally. After testing, the staff adjusts the distance between the multiple rollers 6 on both sides according to the required length of the ductile iron pipe to be painted. The staff pulls the adjusting rod 201 upward, which moves the transmission plate 202. The transmission plate 202 moves the locking block 203, canceling the locking between the locking block 203 and the locking plate 11. After cancellation, the electric push rod 101 is activated. The telescopic end of 01 extends and pushes the transmission seat 102 to slide upward along the limit slide rail. The transmission seat 102 drives the two U-shaped rods 103 to move outward through the connecting plate 104. The U-shaped rods 103 drive the two mounting frames 4 to expand outward synchronously on the mounting plate 3. The mounting frames 4 drive the multiple support rollers 6 to move outward through multiple rotating seats 5, thereby increasing the distance between the multiple support rollers 6. Conversely, it can decrease the distance between the multiple support rollers 6. After the distance between the multiple support rollers 6 is adjusted, the staff uses the snap-fit ​​mechanism to snap-fit ​​and fix the snap-fit ​​plate 11. Then, the workers place the ductile iron pipe to be painted onto the two outer support rollers 6, start the forward and reverse motor, and the forward and reverse motor drives one of the multiple rotating seats 5 to rotate. The rotating seat 5 drives the other rotating seat 5 to rotate through the limiting sleeve 9 (because the other rotating seat 5 is connected to multiple sprockets 7 and chain drive). The rotating seat 5 drives the remaining rotating seats 5 to rotate through the remaining limiting sleeves 9. The multiple rotating seats 5 rotating synchronously drive the multiple support rollers 6 to rotate synchronously. The rotation of the support rollers 6 transports the ductile iron pipe. During the transport process, the ductile iron pipe rotates slowly under the action of the rotation of the support rollers 6. During the transport process, the spraying equipment above the support roller device sprays anti-corrosion paint onto the outer wall of the ductile iron pipe, realizing the painting operation on the outer wall of the ductile iron pipe.

[0025] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A roller support device for spraying anti-corrosion paint on the outer wall of ductile iron pipes, comprising a base plate (1), wherein a support frame (2) is mounted on the upper side of the base plate (1), characterized in that, Also includes: Mounting plate (3), which is mounted on the upper side of the support frame (2), and two mounting frames (4) are sleeved on the mounting plate (3), which can move along the mounting plate (3); An adjustment component is provided on the support frame (2) for synchronously adjusting the positions of the two mounting frames (4) on the mounting plate (3); Rotary seat (5), multiple rotating seats (5) are rotatably installed on the inner side of the mounting frame (4), and a support roller (6) is sleeved on the outer side of the rotating seat (5). A sprocket (7) is sleeved on one of the rotating seats (5) on both sides, and multiple sprockets (7) are connected by chain drive. Support frame (8), the support frame (8) is installed on the upper side of the mounting plate (3), and multiple limiting sleeves (9) are movably installed on the top of the support frame (8). The mounting frame (4) on one side of the mounting frame (4) is equipped with a mounting bracket (10), and the mounting bracket (10) moves synchronously with the mounting frame (4). The snap-fit ​​plate (11) is installed on both sides of the mounting frame (4) on one side of the two sides, and the snap-fit ​​plate (11) is inserted into the inside of the snap-fit ​​seat (10). A snap-fit ​​mechanism is provided inside the snap-fit ​​seat (10) for snap-fit ​​fixing of the snap-fit ​​seat (10) and the snap-fit ​​plate (11).

2. The roller support device for spraying anti-corrosion paint on the outer wall of ductile iron pipe according to claim 1, characterized in that, The adjustment component includes: Electric push rod (101), both sides of the bottom wall of the support frame (2) are provided with electric push rod (101). A transmission seat (102) is mounted on the telescopic end of the electric push rod (101) and moves synchronously with the telescopic end of the electric push rod (101). U-shaped rod (103), said U-shaped rod (103) is installed on the lower side of said mounting frame (4); A connecting plate (104) is sleeved on the transmission seat (102) and the U-shaped rod (103). The transmission seat (102) is connected to the two U-shaped rods (103) through the two connecting plates (104).

3. A roller support device for spraying anti-corrosion paint on the outer wall of ductile iron pipes according to claim 2, characterized in that, Limiting slide rails are installed on both sides of the inner wall of the support frame (2), and the transmission seat (102) is slidably connected to the limiting slide rails.

4. A roller support device for spraying anti-corrosion paint on the outer wall of ductile iron pipes according to claim 1, characterized in that, Multiple auxiliary supports (12) are installed on the upper side of the mounting frame (4). The multiple auxiliary supports (12) are sleeved on the outer side of the corresponding rotating seat (5) for auxiliary support of the rotating seat (5).

5. A roller support device for spraying anti-corrosion paint on the outer wall of ductile iron pipes according to claim 1, characterized in that, The latching mechanism includes: Adjusting rod (201), which is inserted into the upper side of the snap-fit ​​seat (10) and is movable inside the snap-fit ​​seat (10); A transmission plate (202) is installed at the bottom end of the adjusting rod (201) and moves synchronously with the adjusting rod (201); A snap-fit ​​block (203) is installed on the lower side of the transmission plate (202) and moves synchronously with the transmission plate (202); A spring (204) is sleeved on the adjusting rod (201), and the two ends of the spring (204) are respectively connected to the snap-fit ​​seat (10) and the transmission plate (202).

6. A roller support device for spraying anti-corrosion paint on the outer wall of ductile iron pipes according to claim 5, characterized in that, The upper side of the snap-fit ​​plate (11) is provided with a plurality of snap-fit ​​slots, the width of which is adapted to the width of the snap-fit ​​block (203).

7. A roller support device for spraying anti-corrosion paint on the outer wall of ductile iron pipes according to claim 1, characterized in that, Multiple guide posts are installed on both sides of the support frame (2), and a limiting plate is sleeved on the guide post. The upper side of the limiting plate is connected to the lower side of the mounting frame (4).

8. A roller support device for spraying anti-corrosion paint on the outer wall of ductile iron pipes according to claim 1, characterized in that, Square card plates are installed on both sides of the inner wall of the limiting sleeve (9), and two square card slots are opened on the outer side of the rotating seat (5).

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