Outer wall shot blasting method for steel pipe anti-corrosion treatment

Abstract

The invention discloses an outer wall shot blasting method for steel pipe anti-corrosion treatment, and relates to the technical field of steel pipe anti-corrosion treatment. When the to-be-shot-blasted steel pipe reaches the inlet of the compartment body, the sealing curtain at the inlet of the compartment body is opened, and the to-be-shot-blasted steel pipe enters the shot blasting chamber; starting an impeller head to spray shots to perform shot blasting treatment on the surface of the steel pipe; when the steel pipe reaches the outlet of the compartment, the sealing curtain at the outlet is opened, and the steel pipe penetrates out of the compartment; after the steel pipe completely enters the carriage body, the sealing curtain at the inlet is closed; after steel pipe shot blasting is completed, the shot blasting device is shut down; after the steel pipe completely passes through the carriage body, the sealing curtain at the outlet is closed; the conveying trolley has the beneficial effects that steel pipes with different sizes can be placed on the conveying trolley through the supporting structure of the conveying trolley, the height change of the lowest point of each steel pipe is small, and then the shot blasting devices are arranged on the two sides of the lower portion of the compartment body, so that the distance change between the steel pipes with different pipe diameters and a blasting head is small during shot blasting, and the application range of the steel pipes is widened.

Description

Technical Field

[0001] The invention relates to the technical field of steel pipe anti-corrosion treatment, in particular to an outer wall shot blasting method for steel pipe anti-corrosion treatment. Background Art

[0002] Steel pipes are widely used in many industrial fields, such as construction, oil, and natural gas. However, during use, steel pipes are affected by various environmental factors, which can lead to corrosion of their outer walls. In order to extend the service life of steel pipes, anti-corrosion treatment becomes particularly important.

[0003] Traditional anti-corrosion treatment methods mainly include coating and electroplating. The electroplating method is to deposit metal or alloy on the outer wall of the steel pipe through electrochemical reaction to improve its corrosion resistance. However, the electroplating method has problems such as environmental pollution and high energy consumption; the coating method is to achieve the purpose of anti-corrosion by coating the outer wall of the steel pipe with anti-corrosion coating. However, this method requires the steel pipe to be shot blasted to remove the surface rust layer before spraying; However, the existing shot blasting methods are mostly shot blasting machines with the blasting head on the equipment, such as Figure 3 As shown, steel sand is sprayed from above. With this arrangement, steel sand is thrown from top to bottom, which is convenient for large-scale shot blasting on the surface of the steel pipe. Steel sand debris can also fall to the lower collection chamber to reduce dust floating up. However, it has some limitations on the size of the processed steel pipe, and is suitable for a relatively small size range of steel pipes. When the size of the steel pipe is small, the distance between the blasting head and the steel pipe is far, and the sprayed steel sand has no impact force when it reaches the surface of the steel pipe, and the desired effect cannot be achieved. Summary of the invention

[0004] The object of the present invention is to provide a method for shot blasting the outer wall of a steel pipe for anti-corrosion treatment in order to solve the above-mentioned problems.

[0005] The present invention achieves the above-mentioned purpose through the following technical solutions: A method for shot blasting the outer wall of a steel pipe for anti-corrosion treatment, comprising: The track extends through the compartment, and the transport trolley on the track transports the steel pipe to be shot blasted along the preset track; When the shot blasting steel pipe reaches the inlet position of the compartment, the sealing curtain at the inlet of the compartment is opened, and the shot blasting steel pipe enters the shot blasting room; The shot blasting machine is started to eject the projectiles to perform the shot blasting treatment on the surface of the steel pipe, and the shot blasting machine is arranged at the front and rear sides of the lower part of the shot blasting chamber, and the projectiles are ejected obliquely upward to the surface of the steel pipe at the same time; When the steel pipe reaches the exit position of the compartment, the sealing curtain of the exit opens and the steel pipe passes through the compartment; After the steel pipe is completely inserted into the compartment, the sealing curtain at the inlet is closed; After the steel pipe shot blasting is completed, the shot blasting machine stops; After the steel pipe has completely passed through the compartment, the sealing curtain at the exit is closed.

[0006] Preferably: the compartment is a square channel.

[0007] Preferably: a supporting wheel frame for supporting the rolling of the steel pipe is arranged on the upper surface of the transport trolley, and the supporting wheel frame comprises a rotatable V-frame installed on the upper surface of the transport trolley and rolling wheels connected at both ends of the V-frame by bearings.

[0008] Preferably: during the shot blasting process, the scattered projectiles and steel sand fall to the bottom of the shot blasting chamber by gravity, a foundation pit is dug in the foundation below the body, a feeding net flush with the foundation is provided in the foundation pit, a collecting funnel is provided below the feeding net, a transverse screw conveyor for horizontally gathering the falling materials is provided at the lower end of the collecting funnel, after the projectiles fall, they pass through the feeding net and enter the collecting funnel, after being gathered by the transverse screw conveyor, they enter the elevator through the longitudinal gathering and dropping material for longitudinal feeding, and then are lifted to the top of the body by the elevator, and the projectile-sand mixture is sent to the projectile-sand separator for separation through the longitudinal screw conveyor, the separated projectiles are transported to the shot blasting machine for use through pipelines, and the steel sand is separated and discharged by the projectile-sand separator, so as to realize the recycling of projectiles.

[0009] Preferably: a platform is fixedly installed on the box body, the shot sand separator is installed on the platform, and a ladder is fixedly installed on the side of the platform.

[0010] Preferably: a dust removal system is fixedly installed above the box, and the dust removal system vacuums the box during the shot blasting process. The dust removal system filters the airflow drawn from the box in the form of bag dust removal.

[0011] Preferably, the sealing curtain is an electric rolling door.

[0012] Preferably, the sealing curtain is a cloth curtain.

[0013] Compared with the prior art, the beneficial effect of the present invention lies in that: through the supporting structure of the transport trolley, steel pipes of different diameters can be placed on the transport trolley, and the height of the lowest point of the steel pipe does not change much, and then by arranging the shot blasting machine on both sides of the lower part of the compartment, the distance between the steel pipes of different diameters and the blasting head does not change much during shot blasting, thereby improving the application range of the steel pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0015] Figure 1It is a schematic diagram of the main structure of a method for shot blasting the outer wall of a steel pipe for anti-corrosion treatment according to the present invention.

[0016] Figure 2 It is a right-side structural schematic diagram of a method for shot blasting the outer wall of a steel pipe for anti-corrosion treatment according to the present invention.

[0017] Figure 3 The invention relates to a prior art method for outer wall shot blasting of a steel pipe for anti-corrosion treatment.

[0018] The following are the descriptions of the reference numerals: 1. Shot blasting room; 2. Dust removal system; 3. Shot sand separator; 4. Elevator; 5. Shot blasting machine; 6. Platform; 7. Ladder; 8. Horizontal screw conveyor; 9. Electric rolling door; 10. Foundation; 11. Track; 12. Steel pipe to be shot blasted; 13. Transport trolley; 14. Material collecting hopper; 15. Material discharge net; 16. Box; 17. Longitudinal screw conveyor. DETAILED DESCRIPTION

[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0021] The present invention will be further described below in conjunction with the accompanying drawings: Example 1

[0022] like Figure 1-Figure 2As shown, a method for shot blasting the outer wall of a steel pipe for anti-corrosion treatment comprises the following steps: Step S1: the track 11 extends through the compartment 16, and the transport trolley 13 on the track 11 transports the steel pipe 12 to be shot blasted along the preset track 11; Step S2: When the shot blasting steel pipe 12 reaches the inlet position of the compartment 16, the sealing curtain at the inlet of the compartment 16 is opened, and the shot blasting steel pipe 12 enters the shot blasting chamber 1; Step S3: starting the shot blasting machine 5 to spray the projectiles to perform a shot blasting treatment on the surface of the steel pipe, wherein the shot blasting machine 5 is arranged at the front and rear sides of the lower part of the shot blasting chamber 1, and simultaneously sprays the projectiles obliquely upward to the surface of the steel pipe; Step S4: When the steel pipe reaches the exit position of the compartment 16, the sealing curtain of the exit is opened, and the steel pipe passes through the compartment 16; Step S5: After the steel pipe completely enters the compartment 16, the sealing curtain at the inlet is closed; Step S6: After the steel pipe shot blasting is completed, the shot blasting machine 5 is stopped; Step S7: After the steel pipe completely passes through the compartment 16, the sealing curtain at the exit is closed.

[0023] Among them, the box body 16 is a square channel; the upper surface of the transport trolley 13 is provided with a supporting wheel frame for supporting the rolling of the steel pipe, and the supporting wheel frame includes a rotatable V-frame installed on the upper surface of the transport trolley 13 and rolling wheels connected by bearings at both ends of the V-frame; during the shot blasting process, the scattered projectiles and steel sand fall to the bottom surface of the shot blasting chamber 1 due to gravity, and a foundation pit is dug in the foundation 10 below the box body 16, and a feeding net 15 flush with the foundation 10 is provided in the foundation pit, and a collecting funnel 14 is provided below the feeding net 15, and a transverse screw conveyor 8 for horizontally gathering the falling materials is provided at the lower end of the collecting funnel 14. After the pellets fall, they pass through the feeding net 15 and enter the collecting funnel 14, and are gathered by the transverse screw conveyor 8 After that, the falling materials enter the elevator 4 through the longitudinal gathering device used for longitudinal feeding, and then are lifted by the elevator 4 to the top of the compartment 16, and the shot-sand mixture is sent to the shot-sand separator 3 for separation through the longitudinal screw conveyor 17. The separated projectiles are transported to the shot blasting machine 5 through pipelines for use, and the steel sand is separated and discharged by the shot-sand separator 3, so that the projectiles are recycled; a platform 6 is fixedly installed on the compartment 16, and the shot-sand separator 3 is installed on the platform 6, and a ladder 7 is fixedly installed on the side of the platform 6; a dust removal system 2 is fixedly installed above the compartment 16, and the dust removal system 2 vacuums the compartment 16 during the shot blasting process, and the dust removal system 2 filters the airflow drawn from the compartment 16 in the form of bag dust removal; the sealing curtain is an electric rolling door.

[0024] The dust removal system 2, the shot sand separator 3, the elevator 4, the shot blasting machine 5, the transverse screw conveyor 8, the electric rolling door 9, the transport trolley 13 and the longitudinal screw conveyor 17 are all universal standard parts or parts known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or through conventional experimental methods, so no further records will be made here. Example 2

[0025] The difference between this embodiment and embodiment 1 is that the sealing curtain is a cloth curtain.

[0026] The basic principles, main features and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for illustrating the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A method for shot blasting the outer wall of a steel pipe for anti-corrosion treatment, characterized in that: include The track (11) extends through the compartment (16), and the transport trolley (13) on the track (11) transports the steel pipe (12) to be shot blasted along the preset track (11); When the shot blasting steel pipe (12) reaches the inlet position of the compartment (16), the sealing curtain at the inlet of the compartment (16) is opened, and the shot blasting steel pipe (12) enters the shot blasting chamber (1); The shot blasting machine (5) is started to eject the projectiles to perform a shot blasting treatment on the surface of the steel pipe, wherein the shot blasting machine (5) is arranged at the front and rear sides of the lower part of the shot blasting chamber (1) to eject the projectiles obliquely upwards and simultaneously onto the surface of the steel pipe; When the steel pipe reaches the exit position of the compartment (16), the sealing curtain of the exit opens, and the steel pipe passes through the compartment (16); After the steel pipe has completely entered the compartment (16), the sealing curtain at the inlet is closed; After the steel pipe is shot blasted, the shot blasting machine (5) is stopped; After the steel pipe has completely passed through the compartment (16), the sealing curtain at the outlet is closed.

2. The outer wall shot blasting method for anti-corrosion treatment of a steel pipe according to claim 1, characterized in that: The compartment (16) is a square channel.

3. The outer wall shot blasting method for anti-corrosion treatment of a steel pipe according to claim 1, characterized in that: The upper surface of the transport trolley (13) is provided with a support wheel frame for supporting the rolling of the steel pipe, and the support wheel frame comprises a rotatable V-shaped frame mounted on the upper surface of the transport trolley (13) and rolling wheels connected at both ends of the V-shaped frame via bearings.

4. The outer wall shot blasting method for anti-corrosion treatment of a steel pipe according to claim 1, characterized in that: During the shot blasting process, the scattered projectiles and steel sand fall to the bottom surface of the shot blasting chamber (1) due to gravity. A foundation pit is dug in the foundation (10) below the box (16). A material discharge net (15) flush with the foundation (10) is provided in the foundation pit. A material receiving hopper (14) is provided below the material discharge net (15). A transverse screw conveyor (8) for horizontally gathering and dropping materials is provided at the lower end of the material receiving hopper (14). After the projectiles fall, they pass through the material discharge net (15) and enter the material receiving hopper (14). After being gathered by the transverse screw conveyor (8), they enter the elevator (4) through the longitudinal gathering and dropping material for longitudinal feeding. Then, they are lifted by the elevator (4) to the top of the box (16) and sent to the projectile sand separator (3) for separation through the longitudinal screw conveyor (17). The separated projectiles are transported to the shot blasting machine (5) for use through a pipeline. The steel sand is separated and discharged by the projectile sand separator (3), thereby realizing the recycling of projectiles.

5. The outer wall shot blasting method for anti-corrosion treatment of a steel pipe according to claim 2, characterized in that: A platform (6) is fixedly mounted on the box body (16), the pellet sand separator (3) is mounted on the platform (6), and a ladder (7) is fixedly mounted on the side of the platform (6).

6. The outer wall shot blasting method for anti-corrosion treatment of a steel pipe according to claim 1, characterized in that: A dust removal system (2) is fixedly installed above the box (16). The dust removal system (2) vacuums the box (16) during the shot blasting process. The dust removal system (2) filters the airflow drawn from the box (16) in the form of a bag dust removal system.

7. The outer wall shot blasting method for anti-corrosion treatment of a steel pipe according to claim 1, characterized in that: The sealing curtain is an electric rolling door (9).

8. The outer wall shot blasting method for anti-corrosion treatment of a steel pipe according to claim 1, characterized in that: The sealing curtain is a cloth curtain.

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