A ductile cast iron pipe inner wall painting equipment

Abstract

This utility model relates to a coating device for the inner wall of ductile iron pipes, comprising: a support frame sleeved on the outside of the pipe opening and a spraying machine; the support frame is frictionally connected to the circumferential surface of the pipe opening via metal springs; the spraying machine includes a body disposed inside the ductile iron pipe, the body being interconnected with a delivery pump via a hollow metal tube and a flexible metal tube, the flexible metal tube extending through the support frame to the outside of the support frame, and the hollow metal tube extending into the inside of the support frame. This utility model, by setting up a support frame, increases the support points for the spraying machine, allowing the spraying machine's own rollers to separate from the inner wall of the ductile iron pipe when it moves to the pipe opening to perform spraying operations. At this time, the support frame replaces the rollers of the spraying machine to provide support points, thus ensuring sufficient stability when the spraying machine sprays the pipe opening.

Description

Technical Field

[0001] This utility model relates to the technical field of pipeline inner wall spraying equipment, specifically to a ductile iron pipe inner wall coating equipment. Background Technology

[0002] The pipe inner wall spraying machine is a device capable of spraying the inner wall of large-diameter pipes. In operation, a support frame with rollers extends into the inner wall of the pipe. Paint is fed into a rotating nozzle via a pump and hose, and then sprayed out, evenly coating the inner wall of the pipe. This type of pipe inner wall spraying machine is manually operated; the machine is pulled along the inner wall of the pipe during the spraying process, thus achieving the effect of spraying the entire inner wall of the pipe.

[0003] Ductile iron pipes are divided into two ends: a socket and a spigot. The inner diameter of the socket is larger than the outer diameter of the spigot. When using ductile iron pipes, it is necessary to connect them by inserting the spigot into the socket of another ductile iron pipe. This allows the ductile iron pipes to be connected one by one. The combination of sockets and spigots makes it unsuitable to use pipe inner wall spraying machines when applying anti-rust coating to the inner wall of ductile iron pipes.

[0004] When this equipment is used to coat ductile iron pipes, the rollers cannot make contact with the inner wall of the pipe when the equipment moves to the pipe opening. As a result, the equipment lacks sufficient support and its movement is unstable, leading to inconsistent coating results at the pipe opening and affecting the protective effect on the inner wall of the ductile iron pipe. Therefore, this paper proposes a ductile iron pipe inner wall coating equipment to solve the above-mentioned problems. Utility Model Content

[0005] Based on the above description, this utility model provides a coating device for the inner wall of ductile iron pipes to solve the problem that when existing pipe inner wall spraying machines spray the inner wall of ductile iron pipes, the inner diameter at the pipe opening is inconsistent with the inner diameter of the pipe, resulting in insufficient support points for the pipe inner wall spraying machine and thus unstable spraying effect at the pipe opening.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: a ductile iron pipe inner wall coating equipment, comprising: a support frame and a spraying machine sleeved on the outside of the city gate;

[0007] The support frame is frictionally connected to the circumferential surface outside the city gate via metal spring sheets;

[0008] The spraying machine includes a body disposed inside a ductile iron pipe. The body is interconnected with a delivery pump via a hollow metal pipe and a flexible metal hose. The flexible metal hose extends through the support frame to the outside of the support frame, and the hollow metal pipe can extend into the inside of the support frame.

[0009] Based on the above technical solution, the present invention can be further improved as follows.

[0010] Furthermore, the ductile iron pipe includes a pipe body, one end of which is provided with an opening, the inner diameter of which is larger than the outer diameter of the pipe body.

[0011] Furthermore, the support frame includes a perforated disc, and at least three limiting short plates are provided on the circumferential surface of the perforated disc. The limiting short plates are distributed in a ring at equal intervals. A baffle and a spring plate mounting groove are provided on the side of the limiting short plate facing the ductile iron pipe. A metal spring plate that fits tightly against the circumferential surface outside the pipe is provided inside the spring plate mounting groove.

[0012] Furthermore, a protrusion is provided at the center of the perforated disc facing the ductile iron pipe, and a frustum groove is provided at the center of the protrusion facing the ductile iron pipe.

[0013] Furthermore, a guide tube communicating with the frustum groove is provided on the side of the perforated disc opposite to the ductile iron pipe. A transmission block is sleeved on the outside of the guide tube, and a roller cavity communicating with the guide tube is provided inside the transmission block.

[0014] Furthermore, the roller cavity is provided with at least two transmission wheels, both of which extend into the guide tube, and the outer surface of the transmission block is provided with a motor whose output shaft is connected to one of the transmission wheels.

[0015] Furthermore, the metal hose passes through the frustum groove and the guide tube in sequence, and the two drive wheels are respectively disposed on both sides of the metal hose, that is, the metal hose passes between the two drive wheels and fits tightly against the two drive wheels.

[0016] Furthermore, at least four crossbars are provided on the circumferential surface of the guide tube, the four crossbars are symmetrically distributed, at least two vertical plates are provided on the lower surface of the crossbars, and rollers are provided between the two vertical plates.

[0017] Furthermore, the support frame includes a perforated disc, and at least three limiting plates are provided on the circumferential surface of the perforated disc. The limiting plates are distributed in a ring at equal intervals. A baffle and a spring plate mounting groove are provided on the side of the limiting plates facing the ductile iron pipe. A metal spring plate that fits tightly against the circumferential surface of the outer side of the pipe is provided inside the spring plate mounting groove. A protrusion is provided at the center of the side of the perforated disc facing the ductile iron pipe, and a frustum groove is provided at the center of the side of the protrusion facing the ductile iron pipe.

[0018] Furthermore, a guide tube communicating with the frustum groove is provided on the side of the perforated disc opposite to the ductile iron pipe. A transmission block is sleeved on the outside of the guide tube. A roller cavity communicating with the guide tube is provided inside the transmission block. At least two transmission wheels are provided inside the roller cavity. Both transmission wheels extend into the inside of the guide tube. A motor with an output shaft connected to one of the transmission wheels is provided on the outer surface of the transmission block.

[0019] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0020] 1. This utility model sets up components such as a spraying machine, a transmission wheel, and a servo motor. Through the cooperation between the servo motor and the transmission wheel, the transmission wheel pulls the metal hose along the direction of the guide tube under the action of friction, thereby achieving the effect of driving the spraying machine by electric means.

[0021] 2. By setting the metal spring, the support frame can be tightly fitted to the outer surface of the ductile iron pipe opening under the action of the metal spring, and then the support frame and the ductile iron pipe are connected by friction under the action of friction.

[0022] 3. By setting up the support frame, the spraying machine is given additional support points. When the spraying machine moves to the city entrance to perform spraying operations, the rollers of the spraying machine separate from the inner wall of the ductile iron pipe. At this time, the support frame replaces the rollers of the spraying machine to provide support points, thus making the spraying effect at the city entrance sufficiently stable. Attached Figure Description

[0023] Figure 1 A schematic diagram of a ductile iron pipe inner wall coating device provided for an embodiment of this utility model;

[0024] Figure 2 for Figure 1 Another structural diagram from a different perspective;

[0025] Figure 3 for Figure 1 Structural sectional view;

[0026] Figure 4 for Figure 3 Another structural diagram from a different perspective;

[0027] Figure 5 for Figure 4 A magnified view of a portion of region A in the middle;

[0028] Figure 6 This is a schematic diagram of the ductile iron pipe in an embodiment of the present invention;

[0029] Figure 7 This is a schematic diagram of the support frame in an embodiment of the present utility model;

[0030] Figure 8 for Figure 7 Another structural diagram from a different perspective;

[0031] Figure 9 This is a schematic diagram of the structure of the metal spring sheet in an embodiment of this utility model;

[0032] Figure 10 This is a schematic diagram of the support frame structure in Example 2;

[0033] Figure 11 This is a schematic diagram of the connection structure between the ductile iron pipe and the support frame in Example 2;

[0034] The attached diagram lists the components represented by each number as follows:

[0035] 1. Ductile iron pipe; 11. Pipe body; 12. Entrance; 2. Support frame; 21. Perforated disc; 22. Guide pipe; 23. Transmission block; 24. Crossbar; 25. Vertical plate; 26. Roller cavity; 27. Limiting short plate; 28. Spring mounting slot; 29. ​​Baffle; 210. Protrusion; 211. Frustum groove; 212. Limiting long plate; 3. Transmission wheel; 4. Motor; 5. Roller; 6. Metal spring; 7. Spraying machine; 71. Machine body; 72. Metal hollow pipe; 73. Metal flexible hose. Detailed Implementation

[0036] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0038] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0039] Example 1

[0040] Please see Figure 3 and Figure 6 The ductile iron pipe 1 includes a pipe body 11, and one end of the pipe body 11 is provided with a port 12, the inner diameter of the port 12 being larger than the outer diameter of the pipe body 11.

[0041] Based on the above, the pipe body 11 and the port 12 are the existing structures of the ductile iron pipe 1, wherein the end of the pipe body 11 away from the port 12 can be inserted into the interior of the port 12 to realize the connection between the two ductile iron pipes 1.

[0042] Please see Figures 1-5 , Figures 7-9 A coating device for the inner wall of ductile iron pipe, comprising: a support frame 2 and a spraying machine 7 fitted outside the city gate 12;

[0043] The support frame 2 is frictionally connected to the outer circumferential surface of the city gate 12 via a metal spring sheet 6;

[0044] The support frame 2 includes a perforated disc 21 with a hole at its center, which connects the gimbal slot 211 and the guide tube 22, allowing both the metal hollow tube 72 and the metal flexible tube 73 to extend into the guide tube 22. At least three limiting short plates 27 are provided on the circumferential surface of the perforated disc 21, which are distributed in a ring at equal intervals. A baffle 29 and a spring plate mounting groove 28 are provided on the side of the limiting short plate 27 facing the ductile iron tube 1. A metal spring plate 6 is provided inside the spring plate mounting groove 28, which is in close contact with the outer circumferential surface of the gate 12.

[0045] A protrusion 210 is provided at the center of the perforated disc 21 facing the ductile iron pipe 1. A frustum groove 211 is provided at the center of the protrusion 210 facing the ductile iron pipe 1. A guide tube 22 communicating with the frustum groove 211 is provided on the side of the perforated disc 21 away from the ductile iron pipe 1. A transmission block 23 is sleeved on the outside of the guide tube 22. A roller cavity 26 communicating with the guide tube 22 is provided inside the transmission block 23. At least two transmission wheels 3 are provided inside the roller cavity 26. Both transmission wheels 3 extend into the guide tube 22. A motor 4 with an output shaft connected to one of the transmission wheels 3 is provided on the outer surface of the transmission block 23. The motor 4 is preferably a servo motor. The metal hose 73 passes through the frustum groove 211 and the guide tube 22 in sequence. The two transmission wheels 3 are respectively provided on both sides of the metal hose 73, that is, the metal hose 73 passes between the two transmission wheels 3 and is in close contact with the two transmission wheels 3.

[0046] The guide tube 22 has at least four horizontal bars 24 on its circumferential surface, the four horizontal bars 24 are symmetrically distributed, and at least two vertical plates 25 are provided on the lower surface of the horizontal bars 24, with a roller 5 provided between the two vertical plates 25.

[0047] Based on the above, the roller 5, the crossbar 24 and the vertical plate 25 provide sufficient support for the support frame 2, and under the action of the metal spring 6, the support frame 2 is frictionally connected to the outer surface of the ductile iron pipe 1 at the opening 12, that is, the support frame 2 can be directly separated from the ductile iron pipe 1 under the action of the external force in the axial direction of the ductile iron pipe 1.

[0048] When the motor 4 is powered on, it drives the transmission wheel 3 to rotate. After the transmission wheel 3 rotates, it pulls the metal hose 73 under the action of friction, so that the sprayer 7 moves along the axial direction of the ductile iron pipe 1. When the sprayer 7 moves to the city gate 12, the roller of the sprayer 7 separates from the inner wall of the ductile iron pipe 1. At this time, the metal hollow tube 72 moves into the interior of the guide tube 22. During this process, the metal hollow tube 72 extends into the interior of the guide tube 22, so that the sprayer 7 and the support frame 2 are relatively fixed. Then, by pulling the support frame 2, the support frame 2 separates from the ductile iron pipe 1, and the support frame 2 drives the sprayer 7 to move continuously, thereby achieving the effect of uniform spraying at the city gate 12, making the spraying effect sufficiently stable.

[0049] like Figure 3 and Figure 4As shown, the spraying machine 7 includes a body 71 disposed inside the ductile iron pipe 1. The body 71 is interconnected with the delivery pump through a metal hollow pipe 72 and a metal hose 73. The metal hose 73 passes through the support frame 2 and extends to the outside of the support frame 2. The metal hollow pipe 72 can extend into the inside of the support frame 2.

[0050] Based on the above, the spraying machine 7 is existing technology, and its structure, including the rotating nozzle, is not described in detail here. The setting of the metal hollow tube 72, on the one hand, allows the paint to be input into the interior of the machine body 71, and on the other hand, the metal hollow tube 72 and the guide tube 22 cooperate with each other to limit the position of the spraying machine 7, so as to prevent the position of the spraying machine 7 from shifting when it moves together with the support frame 2. The setting of the metal hose 73 serves to transport the paint, and on the other hand, the metal hose 73 has a certain degree of rigidity and can move under the action of the transmission wheel 3.

[0051] Example 2

[0052] Based on Example 1, please refer to Figure 10 and Figure 11 The support frame 2 includes a perforated disc 21. At least three limiting plates 212 are provided on the circumferential surface of the perforated disc 21. The limiting plates 212 are distributed in a ring at equal intervals. A baffle 29 and a spring plate mounting groove 28 are provided on the side of the limiting plates 212 facing the ductile iron pipe 1. A metal spring plate 6 is provided inside the spring plate mounting groove 28, which is in close contact with the circumferential surface of the outer side of the port 12. A protrusion 210 is provided at the center of the side of the perforated disc 21 facing the ductile iron pipe 1. A frustum groove 211 is provided at the center of the side of the protrusion 210 facing the ductile iron pipe 1.

[0053] The perforated disc 21 has a guide tube 22 that communicates with the frustum groove 211 on the side opposite to the ductile iron pipe 1. A transmission block 23 is sleeved on the outside of the guide tube 22. A roller cavity 26 that communicates with the guide tube 22 is provided inside the transmission block 23. At least two transmission wheels 3 are provided inside the roller cavity 26. Both transmission wheels 3 extend into the inside of the guide tube 22. A motor 4 with an output shaft connected to one of the transmission wheels 3 is provided on the outer surface of the transmission block 23.

[0054] Based on the above, the support frame 2, through the mutual cooperation between the limiting plate 212 and the metal spring 6, allows the support frame 2 to be frictionally connected to the outer circumferential surface of the ductile iron pipe 1 at the opening 12 via the metal spring 6. Furthermore, the setting of the limiting plate 212 enables the support frame 2 to move along the axial direction of the ductile iron pipe 1. When the spraying machine 7 moves to the opening 12 under the action of the motor 4 and the transmission wheel 3, the spraying machine 7 moves along the axial direction of the ductile iron pipe 1 together with the support frame 2. During this process, the limiting plate 212 provides sufficient support points, ensuring that the spraying effect of the spraying machine 7 on the inner wall of the opening 12 is sufficiently stable.

[0055] In the above embodiment, the motor 4 drives the transmission wheel 3 and drives the spraying machine 7 to move along the axial direction of the ductile iron pipe 1 under the action of friction to spray the inner wall of the pipe body 11. When the spraying machine 7 moves to the Chengkou 12, the metal hollow pipe 72 moves into the interior of the guide pipe 22, at which time the motor 4 stops working.

[0056] By pulling the support frame 2, the spraying machine 7 is driven to move together, thereby providing sufficient support for the spraying machine 7. Compared with traditional pipe inner wall spraying machines, this coating equipment has more support, ensuring the stability of the spraying effect and making it more suitable for spraying ductile iron pipes 1.

[0057] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A coating device for the inner wall of ductile iron pipes, characterized in that, Includes: a support frame (2) installed outside the city gate (12) and a spraying machine (7); The support frame (2) is frictionally connected to the outer circumferential surface of the city gate (12) via a metal spring sheet (6); The spraying machine (7) includes a body (71) disposed inside a ductile iron pipe (1). The body (71) is connected to a delivery pump through a metal hollow pipe (72) and a metal hose (73). The metal hose (73) passes through the support frame (2) and extends to the outside of the support frame (2). The metal hollow pipe (72) can extend into the inside of the support frame (2).

2. The ductile iron pipe inner wall coating equipment according to claim 1, characterized in that, The ductile iron pipe (1) includes a pipe body (11), and one end of the pipe body (11) is provided with a port (12), the inner diameter of the port (12) being larger than the outer diameter of the pipe body (11).

3. The ductile iron pipe inner wall coating equipment according to claim 1, characterized in that, The support frame (2) includes a perforated disc (21). At least three limiting short plates (27) are provided on the circumferential surface of the perforated disc (21). The limiting short plates (27) are distributed in a ring at equal intervals. A baffle (29) and a spring plate mounting groove (28) are provided on the side of the limiting short plate (27) facing the ductile iron pipe (1). A metal spring plate (6) is provided inside the spring plate mounting groove (28) and fits tightly against the circumferential surface of the outer side of the gate (12).

4. The ductile iron pipe inner wall coating equipment according to claim 3, characterized in that, The perforated disc (21) has a protrusion (210) at the center of the side facing the ductile iron pipe (1), and the protrusion (210) has a frustum groove (211) at the center of the side facing the ductile iron pipe (1).

5. The ductile iron pipe inner wall coating equipment according to claim 4, characterized in that, The perforated disc (21) has a guide tube (22) on the side opposite to the ductile iron pipe (1) that communicates with the frustum groove (211). A transmission block (23) is sleeved on the outside of the guide tube (22), and a roller cavity (26) communicating with the guide tube (22) is provided inside the transmission block (23).

6. The ductile iron pipe inner wall coating equipment according to claim 5, characterized in that, The roller cavity (26) is provided with at least two transmission wheels (3), both of which extend into the guide tube (22). The outer surface of the transmission block (23) is provided with a motor (4) whose output shaft is connected to one of the transmission wheels (3).

7. The ductile iron pipe inner wall coating equipment according to claim 6, characterized in that, The metal hose (73) passes through the frustum groove (211) and the guide tube (22) in sequence. The two drive wheels (3) are respectively located on both sides of the metal hose (73), that is, the metal hose (73) passes between the two drive wheels (3) and fits tightly with the two drive wheels (3).

8. The ductile iron pipe inner wall coating equipment according to claim 5, characterized in that, The guide tube (22) has at least four crossbars (24) on its circumferential surface. The four crossbars (24) are symmetrically distributed. The lower surface of the crossbars (24) has at least two vertical plates (25). A roller (5) is provided between the two vertical plates (25).

9. The ductile iron pipe inner wall coating equipment according to claim 1, characterized in that, The support frame (2) includes a perforated disc (21). At least three limiting plates (212) are provided on the circumferential surface of the perforated disc (21). The limiting plates (212) are distributed in a ring at equal intervals. A baffle (29) and a spring plate mounting groove (28) are provided on the side of the limiting plate (212) facing the ductile iron pipe (1). A metal spring plate (6) is provided inside the spring plate mounting groove (28) and fits tightly against the circumferential surface of the outer side of the gate (12). A protrusion (210) is provided at the center of the side of the perforated disc (21) facing the ductile iron pipe (1). A frustum groove (211) is provided at the center of the side of the protrusion (210) facing the ductile iron pipe (1).

10. The ductile iron pipe inner wall coating equipment according to claim 9, characterized in that, The perforated disc (21) has a guide tube (22) on the side opposite to the ductile iron pipe (1) that communicates with the frustum groove (211). A transmission block (23) is sleeved on the outside of the guide tube (22). A roller cavity (26) communicating with the guide tube (22) is provided inside the transmission block (23). At least two transmission wheels (3) are provided inside the roller cavity (26). Both transmission wheels (3) extend into the inside of the guide tube (22). A motor (4) with an output shaft connected to one of the transmission wheels (3) is provided on the outer surface of the transmission block (23).

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