Spraying equipment for inner wall of nodular cast iron pipe

Abstract

The utility model discloses nodular cast iron pipe inner wall spraying equipment which comprises extension rod control equipment, an extension rod is arranged on the extension rod control equipment, the extension rod control equipment is used for stretching out and drawing back of the extension rod, and a front inner wall spraying mechanism is fixedly arranged at the tail end of the extension rod; the spraying nozzles are uniformly distributed on the electric rotary equipment, so that all-directional spraying without dead angles can be realized, uniform distribution of a coating on the inner wall of the nodular cast iron pipe is ensured, and the spraying quality is improved. And stability is good, the spraying equipment can stably walk on the inner wall of the nodular cast iron pipe through telescopic control of the electric two-stage telescopic rod body and the design of the auxiliary walking wheels, and stability and smoothness in the spraying process are guaranteed.

Description

Technical Field

[0001] The utility model relates to spraying equipment, in particular to a ductile iron pipe inner wall spraying equipment. Background Art

[0002] Spray coating the interior of ductile iron pipes is an anti-corrosion treatment performed on the inner wall of ductile iron pipes. This process typically involves spraying a specific coating or material evenly onto the inner wall to form a protective layer that prevents corrosion during pipe operation. Spray coating can effectively extend the service life of pipes, maintain water quality, and reduce maintenance costs. Common spray coating materials include cement mortar, epoxy resin, and polyurea, each with different anti-corrosion properties and applicable conditions.

[0003] The traditional ductile iron pipe inner wall spraying process has many technical challenges and shortcomings, which directly affect the efficiency and quality of the spraying operation. The following issues are particularly prominent and become the starting point for the design of this technical solution:

[0004] Uneven coating and blind spots: Traditional spraying equipment often struggles to fully coat the inner wall of ductile iron pipes, especially in depressions and corners. This uneven coating not only affects the pipe's aesthetics but, more seriously, leaves these uncovered areas susceptible to corrosion and wear, shortening the pipe's service life and increasing maintenance costs.

[0005] Insufficient stability and smoothness: During the spraying process, the stability of the spray equipment is crucial to coating quality. Due to design flaws or technical limitations, traditional equipment often fails to maintain good stability when moving across the inner wall of ductile iron pipes. This leads to jitter or deviation during the spraying process, which in turn affects the uniformity of the coating thickness. This problem not only reduces spraying efficiency but also seriously affects the final spray quality.

[0006] Therefore, a better ductile iron pipe inner wall spraying equipment is urgently needed on the market. Utility Model Content

[0007] The technical problem to be solved by the utility model is to overcome the defects of the above-mentioned technology and provide a ductile iron pipe inner wall spraying device.

[0008] In order to solve the above technical problems, the technical solution provided by the utility model is a ductile iron pipe inner wall spraying device: comprising an extension rod control device, the extension rod control device is provided with an extension rod, the extension rod control device is used to extend and retract the extension rod, and the end of the extension rod is fixed with a front inner wall spraying mechanism;

[0009] The front inner wall spraying mechanism includes a core tube body, an electric rotary device is fixedly provided at the front of the core tube body, a rotary joint is fixedly provided at the inner side of the rear fixed portion of the electric rotary device, and a spray nozzle is fixedly provided at the front rotating portion of the electric rotary device;

[0010] The outer wall of the core tube body is provided with an elongated hole, and the elongated hole extends from the front portion of the core tube body to the middle portion of the core tube body;

[0011] An electric secondary telescopic rod is fixedly provided on the rear wall of the core tube body, the bottom of the core portion of the electric secondary telescopic rod is fixedly provided on the rear wall of the core tube body, the telescopic portion of the electric secondary telescopic rod is fixedly provided with a front core block, and a sliding block is fixedly provided on the front core block;

[0012] A front movable articulated seat is fixedly provided on the outer wall of the sliding block, an active transmission arm is rotatably provided on the front movable articulated seat, a driven transmission arm is rotatably provided on the other end of the active transmission arm, and the other end of the driven transmission arm is fixedly provided on the rear side of the core tube body through a rear fixed articulated seat; auxiliary walking wheels are symmetrically rotatably provided on both sides of the rotating connection between the active transmission arm and the driven transmission arm.

[0013] As an improvement, the spray nozzle is arranged outward, and there are several spray nozzles that are evenly arranged at the edge of the front rotating part of the electric rotary equipment. The spray nozzle and the rotating joint are connected by a discharge pipe; a feed pipe is provided on the rotating joint, and the feed pipe extends through the core tube body to the outside.

[0014] As an improvement, the number of the elongated holes is several and they are evenly arranged on the outer wall of the core tube body.

[0015] As an improvement, the number of the sliding blocks is several and they are evenly arranged at the edge of the front core block, and the number of the sliding blocks is equal to the number of the long strip holes.

[0016] The advantages of the utility model compared with the existing technology are: uniform spraying: the spray nozzles are evenly distributed on the electric rotary equipment, which can achieve all-round spraying without dead angles, ensure the uniform distribution of the coating on the inner wall of the ductile iron pipe, and improve the spraying quality.

[0017] Good stability: Through the telescopic control of the electric secondary telescopic rod and the design of the auxiliary walking wheel, the spraying equipment can move stably on the inner wall of the ductile iron pipe, ensuring stability and smoothness during the spraying process.

[0018] Strong adaptability: The spraying equipment can adapt to ductile iron pipes of different diameters by adjusting the length of the extension rod, and has high flexibility and adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a three-dimensional structural diagram of a ductile iron pipe inner wall spraying device of the utility model. Figure 1 .

[0020] Figure 2 This is a three-dimensional structural diagram of a ductile iron pipe inner wall spraying device of the utility model. Figure 2 .

[0021] Figure 3 yes Figure 1 Schematic diagram of the locally enlarged structure at point A in the middle.

[0022] Figure 4 The utility model is a schematic diagram of the three-dimensional structure of the front inner wall spraying mechanism of the ductile iron pipe inner wall spraying equipment.

[0023] Figure 5 The utility model is a schematic diagram of the three-dimensional structure of the front inner wall spraying mechanism of the ductile iron pipe inner wall spraying equipment.

[0024] Figure 6 The utility model is a schematic diagram of the main structure of the front inner wall spraying mechanism of the ductile iron pipe inner wall spraying equipment.

[0025] Figure 7 yes Figure 6 Schematic diagram of the cross-sectional structure at AA in the middle. DETAILED DESCRIPTION

[0026] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0027] In the description of the embodiments of the present invention, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the product of the utility model is usually placed when in use. It is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it should not be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and should not be understood as indicating or implying relative importance.

[0028] Furthermore, the use of terms such as "horizontal," "vertical," and "overhanging" does not necessarily imply that the component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0029] In the description of the embodiments of the present invention, “a plurality of” means at least 2.

[0030] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. 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 internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0031] In conjunction with the accompanying drawings, a ductile iron pipe inner wall spraying device includes an extension rod control device 1, the extension rod control device 1 is provided with an extension rod 2, the extension rod control device 1 is used to extend and retract the extension rod 2, and the end of the extension rod 2 is fixedly provided with a front inner wall spraying mechanism 3;

[0032] The front inner wall spraying mechanism 3 includes a core tube body 4, an electric rotary device 5 is fixedly provided at the front of the core tube body 4, a rotary joint 6 is fixedly provided on the inner side of the rear fixed portion of the electric rotary device 5, a spray nozzle 7 is fixedly provided on the front rotating portion of the electric rotary device 5, and the spray nozzle 7 is arranged outward. The number of the spray nozzles 7 is several and evenly arranged at the edge of the front rotating portion of the electric rotary device 5, and the spray nozzle 7 and the rotary joint 6 are connected by a discharge pipe 8; a feed pipe 9 is provided on the rotary joint 6, and the feed pipe 9 passes through the core tube body 4 and extends to the outside;

[0033] The outer wall of the core tube body 4 is provided with a long hole 10, and the long hole 10 extends from the front of the core tube body 4 to the middle of the core tube body 4. The number of the long holes 10 is several and evenly arranged on the outer wall of the core tube body 4;

[0034] An electric secondary telescopic rod body 12 is fixedly provided on the rear wall 11 of the core tube body 4, and the bottom of the core part of the electric secondary telescopic rod body 12 is fixedly provided on the rear wall 11 of the core tube body 4, and the telescopic part of the electric secondary telescopic rod body 12 is fixedly provided with a front core block 13, and a sliding block 14 is fixedly provided on the front core block 13. The number of the sliding blocks 14 is several and evenly arranged at the edge of the front core block 13, and the number of the sliding blocks 14 is equal to the number of the long strip holes 10. The outer wall of the sliding block 14 is fixedly provided with a front movable articulated seat 15, and an active transmission arm 16 is rotatably provided on the front movable articulated seat 15, and the other end of the active transmission arm 16 is rotatably provided with a driven transmission arm 17, and the other end of the driven transmission arm 17 is fixedly provided on the rear side of the core tube body 4 through a rear fixed articulated seat 18; auxiliary walking wheels 19 are symmetrically rotated on both sides of the rotation connection of the active transmission arm 16 and the driven transmission arm 17.

[0035] First, fix the ductile iron pipe on other suitable equipment such as special fixtures to ensure that the ductile iron pipe will not move during the spraying process. This step provides a stable operating object for the subsequent inner wall spraying and ensures the accuracy of the spraying.

[0036] Check that the extension rod control device 1, electric rotary device 5, and electric secondary telescopic rod body 12 are properly connected. Ensure that the circuit connections and piping connections are correct. For example, check that the extension rod 2 is securely connected to the extension rod control device 1, and that the discharge pipe 8 and feed pipe 9 are properly sealed and unobstructed.

[0037] The extension rod control device 1 is started and the extension rod 2 begins to extend by operating the device 1. The extension rod control device 1 may include components such as a motor and a transmission mechanism, and drives the extension rod 2 to extend and retract through a control circuit.

[0038] Driven by the extension rod control device 1, the extension rod 2 gradually extends. Since the front inner wall spraying mechanism 3 is fixed to the end of the extension rod 2, the front inner wall spraying mechanism 3 gradually approaches the interior of the ductile iron pipe as the extension rod 2 extends, until the extension rod 2 reaches the appropriate length, allowing the front inner wall spraying mechanism 3 to fully enter the ductile iron pipe. During this process, the extension length of the extension rod 2 is controlled according to the actual conditions such as the length of the ductile iron pipe to ensure that the front inner wall spraying mechanism 3 reaches the appropriate spraying starting position.

[0039] Start the external control device to control the electric secondary telescopic rod body 12, so that the electric secondary telescopic rod body 12 starts to shorten. The external control device can be a special controller that controls the telescopic action of the electric secondary telescopic rod body 12 by sending an electrical signal.

[0040] As the electric secondary telescopic rod 12 shortens, the front core block 13 fixed to the telescopic portion moves backward. The working principle of the electric secondary telescopic rod 12 is based on a motor or hydraulic drive mode, which converts electrical energy or hydraulic energy into mechanical energy to achieve telescopic movement.

[0041] A sliding block 14 is fixed to the front core block 13. As the front core block 14 moves backward, the sliding block 14 slides backward on the front core block 13. The sliding blocks 14 maintain a relative sliding relationship with the front core block 13. The number of sliding blocks 14 is equal to the number of elongated holes 10. A front movable hinge seat 15 is fixed to the outer wall of the sliding block 14.

[0042] As the sliding block 14 slides backward, the front movable articulated seat 15 drives the active transmission arm 16 to move. One end of the active transmission arm 16 is pivotally mounted on the front movable articulated seat 15. When the active transmission arm 16 moves, its other end, pivotally mounted on the driven transmission arm 17, also moves accordingly. The other end of the driven transmission arm 17 is fixed to the rear side of the core tube 4 via a rear fixed articulated seat 18. In this way, the relative movement of the active transmission arm 16 and the driven transmission arm 17 causes the auxiliary travel wheel 19 to extend outward. The active transmission arm 16 and the driven transmission arm 17 form a structure similar to a connecting rod mechanism. Through the motion conversion of this structure, the linear motion of the sliding block 14 is converted into the outward extension motion of the auxiliary travel wheel 19.

[0043] The auxiliary running wheels 19 extend outward until they abut the inner wall of the ductile iron pipe, thereby ensuring the stability and stability of the front inner wall spraying mechanism 3 within the ductile iron pipe. After the auxiliary running wheels 19 abut the inner wall, they can prevent the front inner wall spraying mechanism 3 from shaking during the spraying process and ensure the stability of the distance between the spray nozzle 7 and the inner wall of the ductile iron pipe.

[0044] The front rotating part of the electric rotary device 5 is controlled by an external control device. The electric rotary device 5 has a driving device such as a motor inside. The external control device sends a signal to control the rotation of the motor, thereby realizing the rotation function of the electric rotary device 5.

[0045] Because the spray nozzles 7 are fixedly mounted on the front rotating portion of the electric rotary device 5, facing outward, and are arranged uniformly along the edge of the front rotating portion, the spray nozzles 7 rotate with it as the front rotating portion of the electric rotary device 5 rotates. This structural design ensures that the spray nozzles 7 form a uniform spray coating on the inner wall of the ductile iron pipe.

[0046] At the same time, the paint enters the rotary joint 6 through the feed pipe 9 and then reaches the spray nozzle 7 through the discharge pipe 8. As the spray nozzle 7 rotates, the paint is evenly sprayed onto the inner wall of the ductile iron pipe, achieving a rust-proof paint spraying effect on the inner wall of the ductile iron pipe. The feed pipe 9 and the discharge pipe 8 form a conveying channel for the paint, ensuring that the paint can smoothly reach the spray nozzle 7 for spraying.

[0047] Optimized spray uniformity: Spray nozzles 7 are evenly and precisely distributed around the perimeter of the electric rotary device 5. This layout design ensures all-around coverage, ensuring uniform coating coverage of every inch of the ductile iron pipe's interior surface. This seamless spraying not only enhances the internal appearance but also strengthens the coating's protective properties, preventing premature corrosion or wear caused by uneven coating, significantly improving the overall quality of the spraying operation.

[0048] Improved stability: The precise telescopic control of the electric two-stage telescopic rod 12, combined with the carefully designed auxiliary travel wheels 19, ensures excellent stability as the spray equipment moves along the inner wall of the ductile iron pipe. This stability not only ensures the continuity and smoothness of the spraying process, but also reduces uneven coating thickness caused by equipment vibration or deviation, thereby ensuring high-standard spraying of the inner wall of the ductile iron pipe.

[0049] Enhanced Adaptability: The sprayer's extension rod (2) features adjustable length, easily adapting to varying ductile iron pipe diameters without requiring replacement or complex adjustments. This highly flexible design significantly enhances the machine's adaptability, enabling it to effectively coat the interior walls of a wide range of ductile iron pipes, meeting diverse production needs and broadening its scope of use and economic value.

[0050] Improved Automation: The coordinated operation of the electric rotary device 5 and the electric secondary telescopic rod 12 enables a high degree of automation in the spraying equipment. This automated operation not only reduces the need for manual operation and labor intensity, but also, through precise program control, further improves the efficiency and consistency of the spraying operation. This increased automation streamlines the production process, significantly improving production efficiency, while also reducing human error and ensuring consistent product quality.

[0051] The above description of the present invention and its embodiments is non-limiting. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by the above, and does not deviate from the purpose of the present invention, without inventive design, a structure and embodiment similar to the technical solution should fall within the scope of protection of the present invention.

Claims

1. A ductile iron pipe inner wall spraying device, characterized by: The invention comprises an extension rod control device (1), wherein an extension rod (2) is provided on the extension rod control device (1), the extension rod control device (1) is used to extend and retract the extension rod (2), and a front inner wall spraying mechanism (3) is fixedly provided at the end of the extension rod (2); The front inner wall spraying mechanism (3) comprises a core tube body (4), an electric rotary device (5) is fixedly provided at the front of the core tube body (4), a rotary joint (6) is fixedly provided on the inner side of the rear fixed portion of the electric rotary device (5), and a spray nozzle (7) is fixedly provided at the front rotating portion of the electric rotary device (5); The outer wall of the core tube body (4) is provided with an elongated hole (10), and the elongated hole (10) extends from the front portion of the core tube body (4) to the middle portion of the core tube body (4); An electric secondary telescopic rod (12) is fixedly provided on the rear wall (11) of the core tube (4); the bottom of the core portion of the electric secondary telescopic rod (12) is fixedly provided on the rear wall (11) of the core tube (4); a front core block (13) is fixedly provided on the telescopic portion of the electric secondary telescopic rod (12); and a sliding block (14) is fixedly provided on the front core block (13); A front movable articulated seat (15) is fixedly provided on the outer wall of the sliding block (14); an active transmission arm (16) is rotatably provided on the front movable articulated seat (15); a driven transmission arm (17) is rotatably provided on the other end of the active transmission arm (16); the other end of the driven transmission arm (17) is fixedly provided on the rear side of the core tube body (4) through a rear fixed articulated seat (18); auxiliary walking wheels (19) are symmetrically rotatably provided on both sides of the rotation connection between the active transmission arm (16) and the driven transmission arm (17).

2. The ductile iron pipe inner wall spraying equipment according to claim 1, characterized in that: The spray nozzle (7) is arranged outward, and the number of the spray nozzles (7) is several and evenly arranged at the edge of the front rotating part of the electric rotary device (5). The spray nozzle (7) and the rotating joint (6) are connected by a discharge pipe (8); the rotating joint (6) is provided with a feed pipe (9), and the feed pipe (9) passes through the core tube body (4) and extends to the outside.

3. The ductile iron pipe inner wall spraying equipment according to claim 2, characterized in that: The number of the elongated holes (10) is several and they are evenly arranged on the outer wall of the core tube body (4).

4. The ductile iron pipe inner wall spraying equipment according to claim 3, characterized in that: The number of the sliding blocks (14) is several and is evenly arranged at the edge of the front core block (13). The number of the sliding blocks (14) is equal to the number of the long strip holes (10).

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