Automatic sand blasting and rust removing device for pipeline

Abstract

The utility model discloses a pipeline automatic sand blasting rust cleaning device, including power control part and nozzle, the nozzle is installed on walking support, is connected with the pipeline, walking support contains center axis and side beam, center axis is located in the middle position of side beam and is hollow, connects pipeline and nozzle, and center axis is fixedly connected with side beam through connecting rod, and walking support is composed of at least two sections of connections, center axis is connected through the piston rod of propelling cylinder, between center axis and between side beam, is connected through slide sleeve respectively, side beam is connected with side edge air cylinder and walking wheel, propelling cylinder and side edge air cylinder are connected with gas source device, walking support walking support is tripod, the utility model works all using air cylinder, avoids the risk of electric shock in the pipeline and the situation that wheel skids in the pipeline or meets the weld block and advances, the stable structure of tripod, the nozzle continues to rotate, and sand particle is evenly sprayed to the pipe wall rust cleaning while continuously advancing and retreating.

Description

Technical Field

[0001] This utility model relates to the technical field of rust removal on the inner wall of pipelines, specifically to an automatic sandblasting device for rust and scale removal from pipelines. Background Technology

[0002] Manual rust removal inside pipelines is high-risk. Small-diameter pipelines are limited by space, making it difficult to complete the rust removal task. Moreover, the high-dust working environment seriously affects the health of workers.

[0003] Utility model patent CN221290889U discloses a pipe inner wall rust removal sandblasting head with a traveling mechanism, including an air pipe, a threaded rod, a fixing block, a receiving block, and a sandblasting head. The air pipe extends into the threaded rod, one end of which is rotatably connected to one side of the fixing block. The fixing block is fixed to one side of the receiving block, and the sandblasting head is located on one side of the receiving block. A multi-size traveling mechanism is provided on the outer side of the threaded rod, facilitating the movement of the sandblasting head within the inner wall of the metal pipe for rust removal. This pipe inner wall rust removal sandblasting head with a traveling mechanism includes an air pipe that slides inside the threaded rod, controlling the rotation of the threaded rod to accommodate various sizes of metal pipes. A fixed motor output drives rollers that slide within the metal pipe, allowing the rollers to travel against the inner wall. However, this roller-driven device is prone to slippage, resulting in low overall reliability. Utility Model Content

[0004] The purpose of this invention is to solve the problems in the background art mentioned above, and to provide an automatic sandblasting and rust removal device for pipes that can reliably move inside the pipe, continuously rotate and remove rust from the pipe wall, and can adapt to various pipe diameters.

[0005] To achieve the above objectives, this utility model provides the following technical solution: An automatic pipe sandblasting and rust removal device includes a power control unit and a nozzle. The nozzle is mounted on a traveling bracket and connected to the pipe. The traveling bracket includes a central shaft and side beams. The central shaft is located in the middle of the side beams and is hollow, connecting the pipe and the nozzle. The central shaft and the side beams are fixedly connected by a connecting rod. The traveling bracket is composed of at least two connected sections. The central shaft is connected by a piston rod of a propulsion cylinder. The central shaft and the side beams are connected by sliding sleeves. The side beams are connected to side cylinders and traveling wheels. The propulsion cylinder and the side cylinders are connected to an air source device.

[0006] Preferably, the walking support is a tripod, which is composed of three sections.

[0007] Preferably, the power control section includes a solenoid valve and a controller. The controller is electrically connected to the solenoid valve, and the solenoid valve is connected to the air circuits of the propulsion cylinder and the side cylinder, respectively.

[0008] Preferably, the nozzle is connected to the central shaft via a rotator, which is driven to rotate by a pneumatic motor through a transmission device, thereby causing the nozzle to rotate.

[0009] Preferably, the piston rod end face of the side cylinder is fitted with an elastic rubber pad.

[0010] Compared with the prior art, the beneficial effects of this utility model are: (1) This utility model uses cylinders to work, which avoids the risk of electric shock in the pipeline. In addition, the structure does not use direct drive wheels to move forward, which avoids the situation where the wheels slip in the pipeline or encounter welds that block the movement.

[0011] (2) The tripod structure is stable and the side cylinder can make this utility model fit the pipe wall size and fit firmly against the inner wall of the pipe. While moving forward and backward, the nozzle rotates continuously to spray sand evenly onto the pipe wall to remove rust. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the rear triangular frame structure of this utility model; Figure 3 This is a schematic diagram of the middle section of the triangular frame structure of this utility model; Figure 4 This is a schematic diagram of the sandblasting structure and the front tripod of this utility model; In the diagram: 1. Nozzle; 2. Front tripod; 201. Front travel wheel; 3. Middle tripod; 301. Middle cylinder seat; 302. Middle propulsion cylinder; 303. Middle travel wheel; 304. Middle side cylinder; 305. Middle propulsion cylinder solenoid valve; 306. Middle side cylinder solenoid valve; 4. Rear tripod; 401. Rear cylinder seat; 402. Rear propulsion cylinder; 403. Rear travel wheel; 404. Rear side cylinder; 405. Rear propulsion cylinder solenoid valve; 406. Rear side cylinder solenoid valve; 5. Elastic rubber pad; 6. Coupling connecting plate; 7. Rotator; 8. Pneumatic motor. Detailed Implementation

[0013] 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 in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0014] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0015] refer to Figure 1 An automatic sandblasting and rust removal device for pipelines includes a traveling support, which is a tripod. The tripod consists of a central shaft connected to side beams via connecting rods. The central shaft is located in the middle of the side beams and is hollow, connecting the pipeline and nozzle 1. Three square tubular elongated connecting rods are evenly welded around the circumference of the central shaft. The other ends of the three connecting rods are connected to the three square tubular elongated side beams. The three side beams are arranged in a triangular pattern and the distance between them is smaller than the size of the rust removal pipeline, allowing the device to be placed inside the pipeline.

[0016] The tripod consists of three sections, which are divided into a front tripod 2, a middle tripod 3, and a rear tripod 4 according to their positional relationship. The corresponding central axis and side beams are also composed of three sections. The middle tripod 3 is longer and has two sets of connecting rods at both ends connecting the central axis and the side beams. The outer diameter of the central axis and the outer dimension of the side beam of the front tripod 2 are smaller than the corresponding inner diameter of the central axis and the inner dimension of the side beam of the middle tripod 3. Similarly, the outer diameter of the central axis and the outer dimension of the side beam of the middle tripod 3 are smaller than the corresponding inner diameter of the central axis and the inner dimension of the side beam of the rear tripod 4. This allows the adjacent central axes and side beams of each section to be connected by sliding sleeves, and the three tripod sections can be far apart or close to each other.

[0017] refer to Figure 2 , Figure 3 , Figure 4The middle section of the triangular frame 3 is welded to the middle section cylinder seat 301 near the central axis. The cylinder body of the middle section propulsion cylinder 302 is fixedly installed on the middle section cylinder seat 301. The rear end of the middle section propulsion cylinder 302 has a limit screw assembly to limit the extension distance of the middle section propulsion cylinder 302. The piston rod at the front end faces and is parallel to the central axis of the front section of the triangular frame 2. A through hole connector is welded to the central axis near the middle section propulsion cylinder 302. The piston rod of the middle section propulsion cylinder 302 passes through the through hole through a threaded connector, thereby realizing the connection with the central axis of the front section of the triangular frame 2.

[0018] A rear cylinder seat 401 is installed near the central axis of the rear tripod 4, but not on the same axis as the middle propulsion cylinder 302. The rear propulsion cylinder 402 is installed with the same model and connection method as the middle propulsion cylinder 302, so that it can be connected to the central axis of the middle tripod 3.

[0019] When the middle section propulsion cylinder 302 extends or retracts, the central shaft and side beam of the front section triangular frame 2 will slide out and slide in within the central shaft and side beam of the middle section triangular frame 3. Similarly, when the rear section propulsion cylinder 402 extends or retracts, the central shaft and side beam of the middle section triangular frame 3 will slide out and slide in within the central shaft and side beam of the rear section triangular frame 4, thus cooperating to achieve the work of this utility model.

[0020] Each side beam is equipped with a traveling wheel, which includes a middle traveling wheel 303 and a rear traveling wheel 403.

[0021] Near the two ends of each side beam of the middle section tripod 3, facing the inner wall of the pipe, two connecting seats for the middle section traveling wheels 303 are welded together. Each connecting seat has two symmetrical lugs with through holes for connection. The middle section traveling wheel 303 is installed in the middle of the two lugs. Similarly, one rear traveling wheel 403 is installed at the rear position of each side beam of the rear section tripod 4; and one front traveling wheel 201 is installed at the front position of each side beam of the front section tripod 2.

[0022] Each side beam is welded with a side cylinder, which includes a middle side cylinder 304 and a rear side cylinder 404.

[0023] Two mid-section side cylinders 304 are welded to the middle position of each side beam of the mid-section tripod 3, with their piston rods facing the inner wall of the pipe. These two mid-section side cylinders 304 ensure good stability of the device against the inner wall of the pipe during operation. Similarly, two rear-section side cylinders 404 are welded to the middle position of each side beam of the rear-section tripod 4. Elastic rubber pads 5 are installed on the piston rod end faces of both the mid-section side cylinders 304 and the rear-section side cylinders 404 to increase friction with the pipe wall. The forward movement of this device is achieved through the combination of the propulsion cylinder and the side cylinders.

[0024] At the front end of the triangular frame 2, a coupling plate 6 connects to the rotary device 7. A nozzle 1, which has a hollow interior, is connected to the front end of the rotary device 7. The rotary device 7 is driven by a pneumatic motor 8, the output of which is connected to a driving synchronous pulley. This driving synchronous pulley is connected to the driven synchronous pulley of the rotary device 7 via a synchronous belt, thus transmitting force. When the pneumatic motor 8 starts and drives the rotary device 7 to rotate continuously, the raw material sand passes through the central shaft of the three-section triangular frame, enters the hollow rotary device 7, and then flows into the nozzle 1.

[0025] The power control section of this utility model includes a controller and a solenoid valve mounted on the connecting rod of the tripod. The controller is electrically connected to the solenoid valve, and the solenoid valve is connected to the cylinder air circuit. The controller commands the solenoid valve to control the air flow and stroke of the cylinder, driving the propulsion cylinder and the side cylinder to move. The solenoid valve of this utility model includes a middle-section propulsion cylinder solenoid valve 305 and a middle-section side cylinder solenoid valve 306 mounted on the third connecting rod of the middle tripod; and a rear-section propulsion cylinder solenoid valve 405 and a rear-section side cylinder solenoid valve 406 mounted on the fourth connecting rod of the rear tripod. The middle section propulsion cylinder solenoid valve 305 is connected to the middle section propulsion cylinder 302, and the middle section side cylinder solenoid valve 306 is connected to the six middle section side cylinders 304 through the air circuit diverter device, which distributes compressed air to each cylinder, pushes the cylinder piston to move, and realizes the corresponding action. Correspondingly, the rear section propulsion cylinder solenoid valve 405 is connected to the rear section propulsion cylinder 402, and the rear section side cylinder solenoid valve 406 is connected to the six rear section side cylinders 404. This invention uses cylinders for all operations, avoiding the risk of electric shock inside the pipe. Furthermore, the structure does not use direct drive wheels to move forward, preventing the wheels from slipping inside the pipe or being blocked by welds.

[0026] Working principle: The present invention is placed inside a pipeline, and each cylinder is connected to a compressed air pipe. The central shaft is connected to the pipeline, and the control switch is turned on. This device uses a three-section tripod, which, through the extension and retraction of the cylinders, causes the distance between the three tripods to close and extend, thus advancing the device. The airflow and stroke are controlled by the controller commanding the solenoid valve. When the piston rod of the rear side cylinder 404 of the rear tripod 4 extends and abuts against the inner wall of the pipe, the rear propulsion cylinder 402 will push the middle tripod 3 forward. The middle propulsion cylinder 302 retracts, and the middle tripod 3 reaches its stroke limit. The piston rod of the side cylinder 304 extends, the piston rod of the rear side cylinder 404 retracts, the rear propulsion cylinder 402 retracts, the middle propulsion cylinder 302 extends to push the front triangular frame 2 forward, and then the rear propulsion cylinder 402 and the rear side cylinder 404 repeat the previous action to achieve continuous forward movement; the pneumatic motor 8 drives the rotary 7 and the nozzle 1 to rotate continuously, and the raw material sand enters the rotary 7 and the nozzle 1 to spray the sand particles evenly onto the inner wall of the pipe to achieve the effect of rust removal and descaling.

[0027] It should be noted that the above is the entire working process of the device, and all contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pipeline automatic sand-blasting rust-removing device, comprising a power control part and a nozzle (1), the nozzle (1) is installed on a walking support and connected with a pipeline, characterized in that: The walking support includes a central shaft and side beams. The central shaft is located in the middle of the side beams and is hollow. It connects pipes and nozzles (1). The central shaft and side beams are fixedly connected by a connecting rod. The walking support is composed of at least two connected sections. The central shaft is connected by the piston rod of the propulsion cylinder. The central shaft and the side beams are connected by sliding sleeves respectively. The side beams are connected to side cylinders and walking wheels. The propulsion cylinder and the side cylinders are connected to an air source device.

2. The automatic sand blasting and rust removing device for pipeline according to claim 1, characterized in that, The walking support is a tripod, which consists of three sections.

3. The automatic sandblasting and rust removal device for pipelines according to claim 2, characterized in that, The power control section includes a solenoid valve and a controller. The controller is electrically connected to the solenoid valve, and the solenoid valve is connected to the air circuits of the propulsion cylinder and the side cylinder, respectively.

4. The automatic sandblasting and rust removal device for pipelines according to claim 3, characterized in that, The nozzle (1) is connected to the central shaft via a rotator (7), which is driven to rotate by a pneumatic motor (8) through a transmission device, thereby causing the nozzle (1) to rotate.

5. The automatic sandblasting and rust removal device for pipelines according to claim 4, characterized in that, The piston rod end face of the side cylinder is fitted with an elastic rubber pad (5).

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