Auxiliary device for spraying polyurethane outside large-diameter nodular cast iron pipe

Abstract

The utility model provides an auxiliary device for spraying polyurethane outside a large-diameter nodular cast iron pipe, which relates to the technical field of nodular cast iron pipe processing and comprises a cast iron pipe main body, connecting pieces are fixed at two ends of the cast iron pipe main body, auxiliary rings are arranged on the outer sides of the two connecting pieces, and inner cavities are arranged on the inner walls of the auxiliary rings. The auxiliary ring is additionally arranged outside the connecting piece at the bell mouth of the cast iron pipe body, the cast iron pipe body is supported through the auxiliary ring, when the carrier roller rotates, a gap is reserved between the carrier roller and the cast iron pipe body due to supporting of the auxiliary ring, and the cast iron pipe body cannot make contact with the carrier roller; the carrier roller can rotate the cast iron pipe body through auxiliary rings at the two ends of the cast iron pipe body, practicability is higher, in addition, a user pulls a pulling plate, a moving plate can be driven to move, accordingly, a clamping column is driven to be separated from a clamping hole formed in a connecting piece, limiting is not needed any more, and the user can conveniently and rapidly detach the auxiliary rings.

Description

Technical Field

[0001] This utility model relates to the field of ductile iron pipe processing technology, and in particular to an auxiliary device for external polyurethane spraying of large-diameter ductile iron pipes. Background Technology

[0002] Ductile iron pipes, with their excellent strength, toughness, and corrosion resistance, are widely used in urban water supply, drainage, and gas transmission. With the acceleration of urbanization and the continuous advancement of infrastructure construction, the demand for large-diameter ductile iron pipes is increasing daily.

[0003] Currently, existing technologies for auxiliary devices for external polyurethane spraying on large-diameter ductile iron pipes conventionally employ a top-cone structure to lift and rotate the pipe before external spraying. However, for pipes with a diameter of DN1800 or larger, using a top-cone structure results in extremely large equipment. To reduce equipment investment while ensuring spraying quality, a roller rotation method is used. However, because the socket area is in direct contact with the roller, the coating adheres severely to the roller after spraying, significantly affecting product quality. Utility Model Content

[0004] The purpose of this invention is to address the problem in existing technologies where a roller rotation method is used to reduce equipment investment while ensuring coating quality. However, because the socket part is in direct contact with the roller, the coating material adheres severely to the roller after spraying, seriously affecting product quality. Therefore, this invention proposes an auxiliary device for external polyurethane spraying on large-diameter ductile iron pipes.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an auxiliary device for external polyurethane spraying of a large-diameter ductile iron pipe, comprising a cast iron pipe body, both ends of the cast iron pipe body are fixed with connectors, and auxiliary rings are provided on the outer sides of the two connectors. An inner cavity is formed on the inner wall of the auxiliary ring, and a spring is fixed on the inner wall of the inner cavity. A locking pin is fixed at one end of the spring, and the end of the locking pin away from the spring passes through the inner cavity and is located inside the connector.

[0006] Preferably, both ends of the outer wall of the card post are fixed with movable plates, and one end of the two movable plates passes through the auxiliary ring and is fixed with a pull plate.

[0007] Preferably, a bracket is fixed on the inner wall of the auxiliary ring, and a pin is provided inside the bracket, with the output end of the pin located inside the bracket.

[0008] Preferably, the auxiliary ring has movable grooves at both ends of the inner wall of the inner cavity that match the movable plate.

[0009] Preferably, the inner wall of the connector is provided with a locking hole that matches the locking post.

[0010] Preferably, both ends of the outer wall of the card post are fixed with limit blocks, and both ends of the inner wall of the auxiliary ring located in the inner cavity are provided with limit grooves that match the limit blocks.

[0011] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0012] In this invention, by adding or removing auxiliary rings to the connector at the socket of the cast iron pipe body, the auxiliary rings support the cast iron pipe body. When the roller rotates, the support of the auxiliary rings creates a gap between the roller and the cast iron pipe body, preventing the cast iron pipe body from contacting the roller. The roller rotates the cast iron pipe body through the auxiliary rings at both ends, enhancing its practicality. Furthermore, by pulling the pull plate, the user can move the moving plate, causing the locking pin to disengage from the locking hole in the connector, eliminating the need for limiting the position. This facilitates quick disassembly of the auxiliary ring. During installation, simply pull the pull plate to retract the locking pin into the inner cavity. Then, place the auxiliary ring on the outside of the connector, release the pull plate, and the locking pin, under the spring's restoring force, enters the locking hole for limiting the position, achieving the effect of quick installation of the auxiliary ring. Attached Figure Description

[0013] Figure 1 A perspective view of an auxiliary device for external polyurethane spraying on a large-diameter ductile iron pipe is presented for this utility model.

[0014] Figure 2 A cross-sectional view of an auxiliary device for external polyurethane spraying on a large-diameter ductile iron pipe is provided for this utility model.

[0015] Figure 3 This utility model provides a schematic diagram of the driving structure of an auxiliary device for external polyurethane spraying on a large-diameter ductile iron pipe.

[0016] Figure 4 This utility model provides a schematic diagram of the support structure for an auxiliary device for external polyurethane spraying on a large-diameter ductile iron pipe.

[0017] Figure 5 This utility model presents a half-sectional view of an auxiliary device for external polyurethane spraying on a large-diameter ductile iron pipe.

[0018] Legend: 1. Cast iron pipe body; 2. Connector; 3. Auxiliary ring; 4. Inner cavity; 5. Spring; 6. Locking post; 7. Limiting block; 8. Limiting groove; 9. Moving plate; 10. Pulling plate; 11. Moving groove; 12. Bracket; 13. Pin; 14. Locking hole. Detailed Implementation

[0019] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0020] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0021] Example 1, such as Figure 1-5 As shown, this utility model provides an auxiliary device for external polyurethane spraying of a large-diameter ductile iron pipe, including a cast iron pipe body 1, with connectors 2 fixed at both ends of the cast iron pipe body 1, and auxiliary rings 3 provided on the outer sides of the two connectors 2. An inner cavity 4 is opened on the inner wall of the auxiliary ring 3, and a spring 5 is fixed on the inner wall of the inner cavity 4. A locking post 6 is fixed at one end of the spring 5, and the end of the locking post 6 away from the spring 5 passes through the inner cavity 4 and is located in the connector 2.

[0022] The overall effect of Embodiment 1 is that by adding or removing auxiliary rings 3 outside the connector 2 at the socket of the cast iron pipe body 1, the auxiliary rings 3 support the cast iron pipe body 1. When the roller rotates, due to the support of the auxiliary rings 3, a gap is left between the roller and the cast iron pipe body 1, and the cast iron pipe body 1 will not contact the roller. The roller will rotate the cast iron pipe body 1 through the auxiliary rings 3 at both ends of the cast iron pipe body 1, which is more practical. By pushing the spring 5, the locking pin 6 enters into the connector 2, which can limit the auxiliary ring 3 and achieve the effect of installing the auxiliary ring 3.

[0023] Example 2, as Figure 1-5 As shown, movable plates 9 are fixed at both ends of the outer wall of the locking post 6. One end of the two movable plates 9 passes through the auxiliary ring 3 and is fixed with a pull plate 10. A bracket 12 is fixed on the inner wall of the auxiliary ring 3. A pin 13 is provided in the bracket 12. The output end of the pin 13 is located in the bracket 12. Movable grooves 11 matching the movable plates 9 are opened at both ends of the inner wall of the inner cavity 4 of the auxiliary ring 3. A locking hole 14 matching the locking post 6 is opened on the inner wall of the connector 2. Limiting blocks 7 are fixed at both ends of the outer wall of the locking post 6. Limiting grooves 8 matching the limiting blocks 7 are opened at both ends of the inner wall of the inner cavity 4 of the auxiliary ring 3.

[0024] The effect achieved by the entire embodiment 2 is that by pulling the pull plate 10, the moving plate 9 can be moved, thereby causing the locking post 6 to disengage from the locking hole 14 opened in the connector 2, and no longer being limited. This makes it convenient for the user to quickly disassemble the auxiliary ring 3. During installation, simply pull the pull plate 10 to cause the locking post 6 to retract into the inner cavity 4. At this time, the auxiliary ring 3 is sleeved on the outside of the connector 2. When the pull plate 10 is released, the locking post 6 enters into the locking hole 14 under the reset thrust of the spring 5, and is limited, thus achieving the effect of quickly installing the auxiliary ring 3.

[0025] Working principle: When using this device, the user pulls the pull plate 10, which moves the moving plate 9, thereby causing the locking post 6 to disengage from the locking hole 14 in the connector 2. This eliminates the need for limiting the position, allowing for quick disassembly of the auxiliary ring 3. During installation, simply pull the pull plate 10, causing the locking post 6 to retract into the inner cavity 4. Then, place the auxiliary ring 3 on the outside of the connector 2. Releasing the pull plate 10 allows the locking post 6 to retract into the locking hole 14 under the restoring force of the spring 5, achieving quick installation of the auxiliary ring 3. After installation, when the roller rotates, the support of the auxiliary ring 3 creates a gap between the roller and the cast iron pipe body 1, preventing the cast iron pipe body 1 from contacting the roller. The roller rotates the cast iron pipe body 1 via the auxiliary rings 3 at both ends.

[0026] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A polyurethane spraying auxiliary device for large-diameter ductile iron pipes, comprising a cast iron pipe body (1), characterized in that: Both ends of the cast iron pipe body (1) are fixed with connectors (2). The outer sides of the two connectors (2) are provided with auxiliary rings (3). The inner wall of the auxiliary rings (3) is provided with an inner cavity (4). A spring (5) is fixed on the inner wall of the inner cavity (4). A locking post (6) is fixed at one end of the spring (5). The end of the locking post (6) away from the spring (5) passes through the inner cavity (4) and is located in the connector (2).

2. The auxiliary device for external polyurethane spraying of a large-diameter ductile iron pipe according to claim 1, characterized in that: Both ends of the outer wall of the card post (6) are fixed with movable plates (9), and one end of the two movable plates (9) passes through the auxiliary ring (3) and is fixed with a pull plate (10).

3. The auxiliary device for external polyurethane spraying of a large-diameter ductile iron pipe according to claim 2, characterized in that: A bracket (12) is fixed on the inner wall of the auxiliary ring (3), and a pin (13) is provided inside the bracket (12). The output end of the pin (13) is located inside the bracket (12).

4. The auxiliary device for external polyurethane spraying of a large-diameter ductile iron pipe according to claim 2, characterized in that: The auxiliary ring (3) has a moving groove (11) at both ends of the inner wall of the inner cavity (4) that matches the moving plate (9).

5. The auxiliary device for external polyurethane spraying of a large-diameter ductile iron pipe according to claim 1, characterized in that: The inner wall of the connector (2) is provided with a locking hole (14) that matches the locking post (6).

6. The auxiliary device for external polyurethane spraying of a large-diameter ductile iron pipe according to claim 1, characterized in that: Both ends of the outer wall of the card post (6) are fixed with limit blocks (7), and both ends of the inner wall of the auxiliary ring (3) located in the inner cavity (4) are provided with limit grooves (8) that match the limit blocks (7).

Images