An apparatus for internal pipeline corrosion protection spraying

Abstract

The application discloses a pipeline anticorrosion spraying device, which comprises an A-material feeding mechanism, a B-material feeding mechanism, a coating mechanism and a variable-diameter adjusting mechanism. The A-material feeding mechanism is used for storing and conveying A-component anticorrosion paint and is pushed by air pressure when conveying the A-component anticorrosion paint. The B-material feeding mechanism is used for storing and conveying B-component anticorrosion paint and is connected with the A-material feeding mechanism. The coating mechanism is connected with the A-material feeding mechanism and the B-material feeding mechanism. The variable-diameter adjusting mechanism is arranged on the outer periphery of the B-material feeding mechanism. The viewing mechanism is arranged on the coating mechanism. The device can reduce the volume, enter the pipeline with smaller diameter and perform anticorrosion coating operation in the complex pipeline environment.

Description

Technical Field

[0001] This application relates to the field of pipeline robot technology, and in particular to a pipeline internal anti-corrosion spraying equipment. Background Technology

[0002] With the rapid development of modern industry, the scale of pipelines for transmitting energy such as oil and natural gas is constantly expanding, and the requirements for corrosion protection of internal welds in pipelines are becoming increasingly stringent. Internal coating is a key process in pipeline corrosion protection, and its quality directly affects the service life and operational safety of the pipeline. Traditional manual coating methods have limitations such as low efficiency, unstable quality, and harsh working environments. The application of pipeline robots provides an efficient and reliable solution for internal coating operations.

[0003] However, in practical engineering applications, especially for internal coating operations on 12-inch (DN300) pipes, pipeline robots face significant challenges. These pipe systems are complex, often containing horizontal and vertical 90° bends with a curvature radius of 1.5D (D being the pipe diameter), as well as uphill and downhill sections with slopes greater than 15°, significantly increasing the difficulty of robot passage and positioning. Simultaneously, the task requires the robot to carry the amount of coating needed for at least three weld joints, placing higher demands on its load-bearing capacity, structural strength, and motion stability. Existing conventional pipeline robots often suffer from insufficient drive capability, poor obstacle-crossing performance, limited load space, or poor posture adaptability, making it difficult to stably and efficiently complete continuous multi-weld coating operations under such complex conditions. Utility Model Content

[0004] An embodiment of this application provides a pipeline internal anti-corrosion spraying device.

[0005] An embodiment of this application provides a pipeline internal anti-corrosion spraying device, comprising:

[0006] The A-component feeding mechanism is used to store and transport the A-component anti-corrosion coating. The A-component anti-corrosion coating is transported by air pressure.

[0007] The B-component feeding mechanism is used to store and transport the B-component anti-corrosion coating, and the B-component feeding mechanism is connected to the A-component feeding mechanism;

[0008] A coating mechanism, which is connected to the A material feeding mechanism and the B material feeding mechanism;

[0009] A diameter adjustment mechanism is disposed on the outer periphery of the B material feeding mechanism;

[0010] An inspection mechanism is provided on the coating mechanism.

[0011] In one embodiment, the material A feeding mechanism includes:

[0012] A first material cylinder, wherein a first piston is provided inside the first material cylinder;

[0013] The second A material cylinder is arranged parallel to the first A material cylinder; a second piston is installed inside the second A material cylinder.

[0014] A pneumatic feeding assembly is disposed at one end of the first A material cylinder and the second A material cylinder, and is connected to both the first A material cylinder and the second A material cylinder, and is used to push the first piston and the second piston;

[0015] The first material conveying component is located at the other end of the first A material cylinder and the second A material cylinder, and is connected to both the first A material cylinder and the second A material cylinder. It is used to input the A component anti-corrosion coating into the first A material cylinder and the second A material cylinder, and to convey the A component anti-corrosion coating output from the first A material cylinder and the second A material cylinder to the coating mechanism.

[0016] In one embodiment, the pneumatic feeding assembly is also equipped with a heating device and a temperature sensor.

[0017] In one embodiment, the material B feeding mechanism includes:

[0018] Material B cylinder; a first discharge port and a second discharge port are respectively provided on both sides of the material B cylinder, the first discharge port and the second discharge port are connected to the material B pump through a three-way connecting pipe, the material B pump is connected to the coating mechanism; a material inlet is also provided on the material B cylinder.

[0019] In one embodiment, the variable diameter adjustment mechanism includes:

[0020] A crossbeam, the two ends of which are respectively connected to one end of the first leg and one end of the second leg; a transverse connecting rod connects the other end of the first leg and the other end of the second leg;

[0021] Wheels are provided at the connection points of the first leg and the transverse link, and at the connection points of the second leg and the transverse link.

[0022] The crossbeam has a groove, a lead screw is engaged in the groove, a support rod slider is sleeved on the lead screw, and the support rod slider passes through the crossbeam;

[0023] An elastic strut, one end of which is connected to the strut slider via a first pin, and the other end of which is connected to the transverse connecting rod via a second pin.

[0024] In one embodiment, the elastic strut has a through groove, and a buckle is provided in the through groove.

[0025] In one embodiment, the material A feeding mechanism further includes:

[0026] A servo motor is connected to two gears, which are connected to a screw pump. The screw pump is connected to the first material conveying assembly and the coating mechanism.

[0027] In one embodiment, the material B feeding mechanism is connected to the material A feeding mechanism via a flexible tube.

[0028] In one embodiment, the pipeline anti-corrosion spraying equipment further includes a telescopic component connected to the coating mechanism for extending or retracting the coating mechanism to ensure the coating width.

[0029] This application has the following advantages over the prior art:

[0030] In this solution, the A-component anti-corrosion coating is propelled by air pressure in the A-component feeding mechanism, which can reduce the overall size of the equipment and allow it to enter smaller diameter pipes for anti-corrosion spraying. Furthermore, the A-component anti-corrosion coating is delivered by air pressure, which does not affect complex pipeline conditions such as bends, uphill slopes, and downhill slopes. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the internal anti-corrosion spraying equipment for pipelines according to an embodiment of this application;

[0033] Figure 2 This is a schematic diagram of the material A feeding mechanism in the pipeline anti-corrosion spraying equipment of this application embodiment. Figure 1 ;

[0034] Figure 3 This is a schematic diagram of the material A feeding mechanism in the pipeline anti-corrosion spraying equipment of this application embodiment. Figure 2 ;

[0035] Figure 4 This is a schematic diagram of the material B feeding mechanism in the pipeline anti-corrosion spraying equipment according to an embodiment of this application;

[0036] Figure 5 This is a schematic diagram of the diameter adjustment mechanism in the pipeline anti-corrosion spraying equipment according to an embodiment of this application. Detailed Implementation

[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0038] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not 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 application.

[0039] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation", "connection" and "joining" should be interpreted broadly, for example, they can refer to fixed connection, detachable connection, or integral connection; for those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0040] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0041] Reference Figure 1 This application provides an internal anti-corrosion spraying device for pipelines, comprising:

[0042] Material A feeding mechanism 1 is used to store and transport component A anti-corrosion coating. The component A anti-corrosion coating is transported by air pressure.

[0043] Material B feeding mechanism 2 is used to store and transport component B anti-corrosion coating. Material B feeding mechanism 2 is connected to material A feeding mechanism 1.

[0044] Coating mechanism 3 is connected to material A feeding mechanism 1 and material B feeding mechanism 2;

[0045] The diameter adjustment mechanism 4 is located on the outer periphery of the B material feeding mechanism 2;

[0046] Inspection mechanism 5 is installed on coating mechanism 3.

[0047] Specifically, the A-component feeding mechanism 1 uses pneumatic pressure to expel the A-component anti-corrosion coating. This pneumatic method saves space in the feeding mechanism 1, reducing the overall size of the equipment and allowing it to be used in smaller diameter pipes for anti-corrosion spraying. Furthermore, compared to traditional gravity-fed delivery of the A-component anti-corrosion coating, this pneumatic method is unaffected by complex pipeline conditions such as bends, uphill sections, and downhill sections.

[0048] In one embodiment, such as Figure 2 , Figure 3 As shown, the material A feeding mechanism 1 includes:

[0049] First A material cylinder 11, and a first piston 111 is provided inside the first A material cylinder 11;

[0050] The second A material cylinder 12 is arranged parallel to the first A material cylinder 11; a second piston 121 is installed inside the second A material cylinder 12.

[0051] The pneumatic feeding assembly 13 is located at one end of the first A material cylinder 11 and the second A material cylinder 12, and is connected to both the first A material cylinder 11 and the second A material cylinder 12, and is used to push the first piston 111 and the second piston 121.

[0052] The first material conveying assembly 14 is located at the other end of the first A material cylinder 11 and the second A material cylinder 12, and is connected to both the first A material cylinder 11 and the second A material cylinder 12. It is used to input the A component anti-corrosion coating into the first A material cylinder 11 and the second A material cylinder 12, and to convey the A component anti-corrosion coating output from the first A material cylinder 11 and the second A material cylinder 12 to the coating mechanism 3.

[0053] Specifically, dividing the material cylinder into two parallel material cylinders can further reduce the overall size of the equipment.

[0054] The first A-material cylinder 11 and the second A-material cylinder 12 use the same pneumatic feeding assembly 13, which operates synchronously when pushing the first piston 111 and the second piston 121, making the output amount of component A anti-corrosion coating more precise. Using pistons allows for smoother input and output of component A anti-corrosion coating.

[0055] The first material conveying assembly 14 is also equipped with a three-way connecting pipe. The first port connects to the input pipe of the A-component anti-corrosion coating, the second port connects to the first A-component cylinder 11 and the second A-component cylinder 12, and the third port connects to the output pipe of the A-component anti-corrosion coating. A valve is installed on the three-way connecting pipe. The first port is opened when the A-component anti-corrosion coating is input, and the third port is opened when the A-component anti-corrosion coating is output. That is, the first material conveying assembly 14 serves as both an input channel and an output channel, sharing the same channel, which also reduces the overall size of the equipment.

[0056] In this embodiment, the piston inside the material cylinder is pushed by air pressure to supply material, which not only reduces the size of the entire equipment, but also ensures that the material supply is not limited by the vehicle body posture when the vehicle body passes through a 1.5D bend. Whether going downhill, uphill or vertically downward, stable material supply and no leakage can be guaranteed.

[0057] In one embodiment, reference continues to be made to Figure 2 The pneumatic feeding assembly 13 is also equipped with a heating device and a temperature sensor 131. These are used to monitor the temperature of the anti-corrosion coating component A within the pneumatic feeding assembly 13 in real time. When the temperature is low, the heating device heats the anti-corrosion coating component A. The heating device is not shown in the diagram.

[0058] In one embodiment, such as Figure 4 As shown, the material feeding mechanism 2 for material B includes:

[0059] Material cylinder 21; Material cylinder 21 has a first discharge port 211 and a second discharge port 212 on its two sides respectively. The first discharge port 211 and the second discharge port 212 are connected to material pump 22 through a three-way connecting pipe. Material pump 22 is connected to coating mechanism 3. Material cylinder 21 is also provided with inlet port 213.

[0060] Specifically, the B-component cylinder 21 is used to store the B-component anti-corrosion coating; the B-component pump 22 can be a gear pump.

[0061] The two discharge ports are connected by a three-way connecting pipe, that is, discharge ports are set at both ends of the B material cylinder 21, which can ensure that the equipment can discharge smoothly when going uphill or downhill, and will not affect the use effect in complex pipelines. In other words, it ensures that the supply of B component anti-corrosion coating is not limited by the vehicle body posture.

[0062] The diameter adjustment mechanism 4 is used to adjust the overall diameter of the spraying equipment so that the equipment can adapt to the anti-corrosion spraying requirements of pipe inner walls with different diameters. Understandably, three sets of diameter adjustment mechanisms 4 are evenly distributed around the outer periphery of the B material feeding mechanism 2.

[0063] In one embodiment, such as Figure 5 As shown, the variable diameter adjustment mechanism 4 includes:

[0064] A crossbeam 41 is connected to one end of the first leg 42 and one end of the second leg 43 at its two ends; a transverse connecting rod 44 is connected between the other end of the first leg 42 and the other end of the second leg 43.

[0065] Wheels 45 are provided at the connection between the first leg 42 and the transverse link 44 and at the connection between the second leg 43 and the transverse link 44.

[0066] A groove is provided on the crossbeam 41, and a lead screw 46 is engaged in the groove. A support rod slider 47 is sleeved on the lead screw 46 and passes through the crossbeam 41.

[0067] The elastic support rod 48 has one end connected to the support rod slider 47 via a first pin 49, and the other end connected to the transverse connecting rod 44 via a second pin 410.

[0068] Specifically, the crossbeam 41 is connected to the first leg 42 and the second leg 43 by a pin, and the transverse connecting rod 44 is also connected to the first leg 42 and the second leg 43 by a pin, so that the crossbeam 41, the first leg 42, the second leg 43 and the transverse connecting rod 44 form a parallelogram that can flexibly change height, which is convenient for adjusting the overall diameter of the equipment according to pipes of different diameters.

[0069] The lead screw 46 is a T-shaped lead screw assembly, including a helical rod and a T-shaped nut fitted onto the helical rod, with the support rod slider 47 fitted onto the T-shaped nut. By adjusting the lead screw 46, the support rod slider 47 can move along the helical rod, thereby driving the elastic support rod 48 to move, pushing the transverse connecting rod 44 to move, so that the wheel 45 is in contact with the inner wall of the pipe. Specifically, when it is necessary to increase the diameter of the equipment, adjusting the lead screw 46 causes the support rod slider 47 to move within the groove, thereby driving the elastic support rod 48 to extend, pushing the transverse connecting rod 44 to expand outward, so that the wheel 45 is in close contact with the inner wall of the pipe. When it is necessary to decrease the diameter of the equipment, the lead screw 46 is adjusted in the opposite direction.

[0070] The variable diameter adjustment mechanism 4 designed in this embodiment can adapt to the anti-corrosion spraying work on the inner wall of pipes with different diameters, thus improving the versatility and practicality of the equipment.

[0071] In one embodiment, reference continues to be made to Figure 5 The elastic support rod 48 has a through groove 481, and a buckle 482 is provided in the through groove 481. The buckle 482 design allows the elastic support rod 48 to be locked after it expands or contracts to ensure the stability of the equipment and prevent movement that would change the size of the equipment.

[0072] It is understandable that an adjustable traveling mechanism 7 is provided on the A material feeding mechanism 1 to accommodate the distance between the overall equipment and the pipe wall after the diameter adjustment mechanism 4 is adjusted.

[0073] In one embodiment, the material A feeding mechanism 1 further includes:

[0074] A servo motor is connected to two gears, which in turn connect to a screw pump. The screw pump is connected to the first material conveying assembly 14 and the coating mechanism 3.

[0075] Specifically, the servo motor drives the screw pump by transmitting torque through gears, and the A-component anti-corrosion coating output by the first material conveying component 14 is delivered to the coating mechanism 3 through the screw pump.

[0076] The coating mechanism 3 includes a mixing component for mixing the A-component anti-corrosion coating delivered by the screw pump and the B-component anti-corrosion coating delivered by the gear pump. Understandably, the coating mechanism 3 also includes a rotary disc, a motor, etc. The rotary disc rotates at high speed under the drive of the motor, evenly dispensing the anti-corrosion coating delivered by the mixing component and applying it to the inner wall of the pipe.

[0077] In one embodiment, the B-material feeding mechanism 2 and the A-material feeding mechanism 1 are connected by a flexible pipe 6, which allows the equipment to adapt to the bending requirements within the pipeline. It is understood that the flexible pipe 6 serves to connect the B-material feeding mechanism 2 and the A-material feeding mechanism 1, and also serves to support the electrical wires, pipes, etc., between them.

[0078] In one embodiment, the anti-corrosion spraying equipment for the pipeline also includes a telescopic component connected to the coating mechanism 3, which is used to extend and retract the coating mechanism 3 to ensure the coating width.

[0079] For example, a scaling component may include:

[0080] The active rod has one end connected to the coating mechanism 3.

[0081] The lead screw motor is connected to the other end of the drive rod via the lead screw nut.

[0082] The outer bushing is fitted around the outer circumference of the lead screw motor.

[0083] The intermediate bushing is fitted around the outer circumference of the drive rod and is located within the inner circumference of the outer bushing.

[0084] A first wear-resistant sleeve is provided between the drive rod and the intermediate bushing;

[0085] A second wear-resistant sleeve is provided between the intermediate bushing and the outer bushing.

[0086] Specifically, the active rod can extend and retract under the drive of the lead screw motor, thereby driving the coating mechanism 3 to move back and forth inside the pipe so that the anti-corrosion coating can evenly cover the entire joint.

[0087] The drive rod is equipped with a stop. When the lead screw motor rotates, it will drive the drive rod to move. After the drive rod moves to a certain position, the stop on the drive rod contacts the intermediate bushing, thereby pushing the intermediate bushing to move. This allows the telescopic assembly to achieve a greater telescopic range under limited space requirements.

[0088] Inspection mechanism 5 is used to inspect the quality of the weld seams and the appearance quality of the coating after application. Through this mechanism, operators can observe the coating process in real time, which not only improves operational safety but also provides timely feedback, enabling them to adjust the equipment according to the actual situation and ensure the quality of the coating operation.

[0089] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A pipeline internal anti-corrosion spraying equipment, characterized in that, include: A material feeding mechanism (1) is used to store and transport component A anti-corrosion coating. The component A anti-corrosion coating is transported by air pressure. The B-component feeding mechanism (2) is used to store and transport the B-component anti-corrosion coating. The B-component feeding mechanism (2) is connected to the A-component feeding mechanism (1). The coating mechanism (3) is connected to the A material feeding mechanism (1) and the B material feeding mechanism (2); A variable diameter adjustment mechanism (4) is disposed on the outer periphery of the B material feeding mechanism (2); Inspection mechanism (5) is provided on the coating mechanism (3).

2. The pipeline internal anti-corrosion spraying equipment according to claim 1, characterized in that, The material A feeding mechanism (1) includes: First A material cylinder (11), and a first piston (111) is provided inside the first A material cylinder (11); The second A material cylinder (12) is arranged parallel to the first A material cylinder (11); a second piston (121) is provided inside the second A material cylinder (12); A pneumatic feeding assembly (13) is disposed at one end of the first A material cylinder (11) and the second A material cylinder (12), and is connected to both the first A material cylinder (11) and the second A material cylinder (12), and is used to push the first piston (111) and the second piston (121); The first feeding assembly (14) is located at the other end of the first A material cylinder (11) and the second A material cylinder (12), and is connected to both the first A material cylinder (11) and the second A material cylinder (12). It is used to feed the A component anti-corrosion coating into the first A material cylinder (11) and the second A material cylinder (12), and to transport the A component anti-corrosion coating output from the first A material cylinder (11) and the second A material cylinder (12) to the coating mechanism (3).

3. The pipeline internal anti-corrosion spraying equipment according to claim 2, characterized in that, The pneumatic feeding assembly (13) is also equipped with a heating device and a temperature sensor (131).

4. The pipeline internal anti-corrosion spraying equipment according to claim 1, characterized in that, The material feeding mechanism (2) for material B includes: B material cylinder (21); the B material cylinder (21) is provided with a first discharge port (211) and a second discharge port (212) on both sides respectively. The first discharge port (211) and the second discharge port (212) are connected to the B material pump (22) through a three-way connecting pipe. The B material pump (22) is connected to the coating mechanism (3). The B material cylinder (21) is also provided with a feed port (213).

5. The pipeline internal anti-corrosion spraying equipment according to claim 1, characterized in that, The variable diameter adjustment mechanism (4) includes: A crossbeam (41) is provided, with one end of the first leg (42) and one end of the second leg (43) connected to each end of the crossbeam (41); a transverse connecting rod (44) is connected between the other end of the first leg (42) and the other end of the second leg (43). Wheels (45) are provided at the connection between the first leg (42) and the transverse link (44) and at the connection between the second leg (43) and the transverse link (44); The crossbeam (41) has a groove, a lead screw (46) is engaged in the groove, a support rod slider (47) is sleeved on the lead screw (46), and the support rod slider (47) passes through the crossbeam (41); An elastic strut (48) is provided, one end of which is connected to the strut slider (47) via a first pin (49), and the other end of which is connected to the transverse connecting rod (44) via a second pin (410).

6. The pipeline internal anti-corrosion spraying equipment according to claim 5, characterized in that, The elastic support rod (48) has a through groove (481) and a buckle (482) is provided in the through groove (481).

7. The pipeline internal anti-corrosion spraying equipment according to claim 2, characterized in that, The material A feeding mechanism (1) also includes: A servo motor is connected to two gears, which are connected to a screw pump. The screw pump is connected to the first material conveying assembly (14) and the coating mechanism (3).

8. The pipeline internal anti-corrosion spraying equipment according to claim 1, characterized in that, The material B feeding mechanism (2) and the material A feeding mechanism (1) are connected by a flexible tube (6).

9. The pipeline internal anti-corrosion spraying equipment according to claim 1, characterized in that, It also includes a telescopic component, which is connected to the coating mechanism (3) and is used to extend and retract the coating mechanism (3) to ensure the coating width.

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