Small-caliber steel pipe inner wall rust removal device

Abstract

The utility model belongs to the technical field of steel pipe rust removal, and particularly relates to a rust removal device for the inner wall of a small-caliber steel pipe. The pressure tank is divided into an upper chamber and a lower chamber, a partition plate is arranged between the upper chamber and the lower chamber, the partition plate is provided with a turning plate, and the turning plate is driven by an actuator; the upper chamber and the lower chamber are respectively provided with a feeding port, and the feeding port is provided with a valve; the upper chamber is provided with a first gas injection port, a first exhaust port, a first pressure sensor and a first pressure gauge; the lower chamber is provided with a second gas injection port, a second exhaust port, a second pressure sensor and a second pressure gauge; a plurality of sand outlets are formed in the bottom of the lower cavity, each sand outlet is provided with a sand adjusting valve, one end of each sand adjusting valve is connected with a compressed air pipe, and the other end of each sand adjusting valve is connected with a sand blasting pipe used for being inserted into one end of a small-caliber steel pipe; the controller is arranged outside the pressure tank and electrically connected with the first pressure sensor and the second pressure sensor. The sand blasting device is used for solving the technical problems that sand blasting equipment in the prior art cannot be continuously used, and the working efficiency is influenced.

Description

Technical Field

[0001] This utility model belongs to the technical field of steel pipe rust removal, specifically relating to a rust removal device for the inner wall of small-diameter steel pipes. Background Technology

[0002] Currently, pressure-feed sandblasting machines are frequently used to remove rust from the inner walls of small-diameter steel pipes. Simply put, the working principle of a pressure-feed sandblasting machine is to use compressed air as a power source to establish working pressure within a pressure tank. This pressure allows the sand particles inside the tank to be thoroughly mixed and pressurized with the compressed air. Subsequently, through the regulation of the sand adjustment valve, the sand particles are forced into the sandblasting pipe. Inside the sandblasting pipe, further accelerated by the compressed air, the sand particles are ejected at high speed from the nozzle, impacting the surface of the workpiece being processed, thus achieving the desired sandblasting effect. Throughout the entire process, compressed air serves both as the power source for supplying the material and as the driving force for accelerating the jet.

[0003] However, during use, the amount of sand inside the pressure tank is limited. Once the sand inside is used up, it is necessary to release the air and depressurize, replenish the sand, and then repressurize. During this process, the sandblasting machine cannot be used normally and cannot continuously complete the rust removal work on small-diameter steel, which affects work efficiency. Utility Model Content

[0004] This utility model provides a rust removal device for the inner wall of small-diameter steel pipes, which solves the technical problem that existing sandblasting equipment cannot be used continuously, thus affecting work efficiency.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A rust removal device for the inner wall of a small-diameter steel pipe, comprising:

[0006] A pressure tank, which is divided into an upper chamber and a lower chamber, is provided with a partition between the upper chamber and the lower chamber, and a flap is provided on the partition, which is driven by an actuator;

[0007] The upper chamber and the lower chamber are each provided with a feeding port, and the feeding port is provided with a valve;

[0008] The upper chamber is provided with a first air injection port, a first air exhaust port, a first pressure sensor, and a first pressure gauge;

[0009] The lower chamber is equipped with a second air injection port, a second air exhaust port, a second pressure sensor, and a second pressure gauge;

[0010] The bottom of the lower chamber is provided with several sand outlets, each of which is equipped with a sand regulating valve. One end of the sand regulating valve is connected to a compressed air pipe, and the other end is connected to a sandblasting pipe. The sandblasting pipe is used to insert one end of a small-diameter steel pipe.

[0011] A controller is located outside the pressure tank and is electrically connected to the first pressure sensor and the second pressure sensor.

[0012] This invention divides the pressure tank into an upper chamber and a lower chamber. During normal operation, the flap is open, and both the upper and lower chambers are under high pressure. When sand needs to be added, the flap is closed, and pressure is released through the first vent in the upper chamber. Once the pressure drops to the same level as the ambient air pressure, the feed port of the upper chamber is opened, and sand is added. The feed port is then closed, and air is injected through the first air injection port to pressurize the tank until the pressure in the upper chamber is the same as that in the lower chamber. At this point, the flap is opened again, allowing the sand in the upper chamber to fall into the lower chamber, thus completing the replenishment of the lower chamber. During this replenishment process, the lower chamber can maintain continuous sandblasting without needing to stop for replenishment, improving work efficiency.

[0013] Furthermore, it also includes a sand collector, which is located at the other end of the small-diameter steel pipe, and the collection port of the sand collector is sleeved outside the other end of the small-diameter steel pipe.

[0014] The benefits of this step are: the sand collector can not only collect and reuse the sand particles sprayed into the small-diameter steel pipe, but also prevent rust, dust and other particles removed during sandblasting from spreading everywhere, thus protecting the environment.

[0015] Furthermore, a weighing sensor is also provided at the bottom of the pressure tank, and the weighing sensor is electrically connected to the controller.

[0016] The benefits of this step are as follows: the weight of the pressure tank is detected by the weighing sensor. When the weight of the pressure tank is lower than a certain set value, it indicates that the sand content inside has decreased and sand needs to be added. The controller can control the opening and closing of the valves on the air injection and exhaust ports of the upper and lower chambers, as well as the movement of the flapper, based on the electrical signal from the weighing sensor, so as to realize the automated control of material replenishment.

[0017] Furthermore: the feeding port of the upper chamber is connected to the conveying pipe, the conveying pipe is connected to one end of the sand conveyor, and the other end of the sand conveyor is located below the sand collector.

[0018] The beneficial effects of this step are: the sand particles are formed in a closed loop through the conveying pipe and the sand conveyor, which improves the utilization rate of sand particles.

[0019] Furthermore, a sealing element is provided between the flap and the partition.

[0020] The beneficial effect of this step is that it maintains the airtightness between the flap and the partition through the sealing element.

[0021] Furthermore: a steel pipe frame is provided between the pressure tank and the sand recovery device, and several sets of wheel frames are provided on the steel pipe frame, each set of wheel frames including a driving wheel at one end and a driven wheel at the other end;

[0022] The number of wheel frames is greater than or equal to the number of sandblasting pipes.

[0023] The beneficial effects of this step are: the steel pipe frame can not only support the small-diameter steel pipe, but also drive the small-diameter steel pipe to rotate, thus improving the sandblasting quality.

[0024] Furthermore: the steel pipe frame includes a top plate and a base, one end of the top plate is hinged to the base, and the other end of the top plate is provided with a lifting cylinder;

[0025] Several sets of wheels are mounted on the top surface of the top plate.

[0026] The beneficial effects of this step are: by raising one end of the top plate with the lifting cylinder, the top plate is tilted, which makes it easier for the sand particles inside the small-diameter steel pipe to be discharged into the sand particle recovery device.

[0027] Furthermore: the sandblasting pipe includes a flexible hose section and a rigid hose section, the flexible hose section is connected to the sand adjusting valve, and the rigid hose section is used to insert the small-diameter steel pipe.

[0028] The beneficial effects of this step are: the rigid pipe section can be coaxially inserted into the small-diameter steel pipe, allowing sand particles to be sprayed out evenly from the blasting nozzle, thus ensuring the blasting effect.

[0029] Furthermore, the surface of the rigid pipe section is provided with limiting protrusions.

[0030] The beneficial effects of this step are: the length of the rigid pipe section inserted into the small-diameter steel pipe is determined by the limiting protrusion, thus ensuring a stable sandblasting effect.

[0031] The beneficial effects of this utility model are:

[0032] 1. This application divides the pressure tank into an upper chamber and a lower chamber. During operation, the upper and lower chambers are connected or disconnected by opening and closing a flap. When the pressure tank needs to be replenished with sand, the flap separates the upper and lower chambers, allowing the upper chamber to be replenished while the lower chamber continues to operate. The structure of this application ensures that the pressure tank can continue sandblasting without interruption during the replenishment of sand, eliminating the need for downtime and improving work efficiency.

[0033] 2. This application can also rotate small-diameter steel pipes and recycle sand particles for reuse, which can not only improve the sandblasting quality and sand particle utilization rate, but also protect the environment. Attached Figure Description

[0034] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0035] Figure 1 A top view of a rust removal device for the inner wall of a small-diameter steel pipe provided by this utility model;

[0036] Figure 2 A schematic diagram of the structure of a rust removal device for the inner wall of a small-diameter steel pipe provided by this utility model;

[0037] Figure 3 A cross-sectional structural diagram of the pressure tank in a small-diameter steel pipe inner wall rust removal device provided by this utility model.

[0038] Figure label:

[0039] 1-Pressure tank; 2-Sand recovery device; 3-Conveying pipe; 4-Sand conveyor; 5-Steel pipe frame; 6-Small diameter steel pipe;

[0040] 11-Upper chamber; 12-Lower chamber; 13-Flip plate; 14-Weighing sensor; 15-Sandblasting pipe; 41-Horizontal conveyor belt; 42-Vertical conveyor belt;

[0041] 111 - Feed inlet; 121 - Sand outlet. Detailed Implementation

[0042] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0043] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0044] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0045] Furthermore, the terms "first," "second," etc., 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. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly defined.

[0046] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0047] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0048] Example

[0049] like Figures 1-3 As shown, the present invention provides a rust removal device for the inner wall of a small-diameter steel pipe, comprising:

[0050] Pressure tank 1, the pressure tank is divided into an upper chamber 11 and a lower chamber 12, a partition is provided between the upper chamber 11 and the lower chamber 12, a flap 13 is provided on the partition, the flap 13 is driven by an actuator, the actuator can generally be divided into an electric actuator or a pneumatic actuator, and a pneumatic actuator is preferred in this application;

[0051] The upper chamber 11 and the lower chamber 12 are also respectively provided with feeding ports 111, and the feeding ports 111 are provided with valves; the valves can also be controlled by actuators.

[0052] The upper chamber 11 is provided with a first air injection port, a first air exhaust port, a first pressure sensor, and a first pressure gauge;

[0053] The lower chamber 12 is provided with a second air injection port, a second air exhaust port, a second pressure sensor, and a second pressure gauge; each of the first air injection port, the second air injection port, the first air exhaust port, and the second air exhaust port is equipped with a solenoid valve, and the pneumatic actuator mentioned above also includes a solenoid valve. Each solenoid valve is electrically connected to the controller described below, and the controller controls the opening and closing of each solenoid valve according to different detection signals to realize the automated control of the structure of this application; and the first air exhaust port and the second air exhaust port are also equipped with silencers to reduce the noise during exhaust; the first pressure gauge and the second pressure gauge are used to display the real-time pressure values ​​inside the upper chamber 11 and the lower chamber 12;

[0054] The bottom of the lower chamber 12 is provided with a number of sand outlets 121, and each sand outlet 121 is provided with a sand adjusting valve. One end of the sand adjusting valve is connected to a compressed air pipe, which is used as a power source for sandblasting, and the other end is connected to a sandblasting pipe 15, which is used to insert one end of a small-diameter steel pipe 6.

[0055] The controller is located outside the pressure tank 1. The controller can be hung outside the pressure tank 1 or set independently on one side of the pressure tank 1. The controller 1 is electrically connected to the first pressure sensor and the second pressure sensor.

[0056] This invention divides the pressure tank 1 into an upper chamber 11 and a lower chamber 12. When the pressure tank 1 is working normally, the flap 13 is open, and both the upper chamber 11 and the lower chamber 12 are under high pressure. When it is necessary to add sand to the pressure tank 1, the flap 13 is closed, and the pressure is released through the first exhaust port of the upper chamber 11. When the pressure drops to the same level as the ambient air pressure, the feeding port of the upper chamber 11 is opened, and sand is added inside. Then the feeding port 111 is closed, and air is injected into the upper chamber 11 to pressurize it until the pressure of the upper chamber 11 is the same as the pressure of the lower chamber 12. At this time, the flap 13 is opened again, allowing the sand in the upper chamber 11 to fall into the lower chamber 12, thus completing the replenishment of sand to the lower chamber 12. During this replenishment process, the lower chamber 12 is under high pressure throughout, which can maintain the sandblasting state without interruption and without the need to stop the machine for replenishment, thereby improving work efficiency.

[0057] It should be noted that the feeding port 111 of the lower chamber 12 is generally only opened during initial use and maintenance / inspection.

[0058] In one embodiment, a sand collector 2 is also included, which is located at the other end of the small-diameter steel pipe 6, and the collection port of the sand collector 2 is sleeved outside the other end of the small-diameter steel pipe 6.

[0059] During the sandblasting and rust removal process, the sand collector 2 can not only collect and recycle the sand particles sprayed into the small-diameter steel pipe 6 for reuse, but also prevent the rust residue and dust removed during the sandblasting process from spreading everywhere, thus playing a role in protecting the environment.

[0060] In one embodiment, a weighing sensor 14 is also provided at the bottom of the pressure tank 1, and the weighing sensor 14 is electrically connected to the controller.

[0061] The weight of the pressure tank 1 is detected by the weighing sensor 14. When the weight of the pressure tank 1 is lower than a certain set value, it indicates that the sand content inside has decreased and sand needs to be added. The controller can control the opening and closing of the valves on the air injection and exhaust ports of the upper chamber 11 and the lower chamber 12, as well as the movement posture of the flapper, according to the electrical signal of the weighing sensor 14, so as to realize the automatic control of material replenishment.

[0062] Based on the above technical solution, the feeding port 111 of the upper chamber 11 is connected to the conveying pipe 3, the conveying pipe 3 is connected to one end of the sand conveyor 4, and the other end of the sand conveyor 4 is located below the sand collector 2.

[0063] Specifically, the sand conveyor includes a horizontal conveyor belt 41 located below ground level and a vertical conveyor belt 42 (with hoppers or baffles or other components that can hold sand particles) connecting the horizontal conveyor belt 41 and the sand storage box. The sand collector 2 collects the sand particles onto the horizontal conveyor belt 41 and then conveys them onto the vertical conveyor belt 42. The vertical conveyor belt 42 then delivers the sand particles to the sand storage box. The vertical conveyor belt 42 can be vertical or at a certain angle. A closed-loop flow of sand particles is formed through the conveying pipe 3 and the sand conveyor 4, improving the utilization rate of sand particles.

[0064] For example, if the weight of pressure tank 1 when it is full of sand is set to M1 (at which time both the upper chamber 11 and the lower chamber 12 contain sand), and the weight of pressure tank 1 when it is not full of sand is set to M2 (there is no sand in the upper chamber 11), then when the weighing sensor sends an electrical signal of M2, the controller closes the flap 13, vents and depressurizes the upper chamber 11, and replenishes the material through the conveying pipe 2 and the sand conveyor 3 until the weighing sensor sends an electrical signal of M1. The controller can then control the actuator of the valve at the feeding port 111 to close it, inject air into the upper chamber 11 until the air pressure is balanced with that of the lower chamber 12, and finally open the flap 13 to complete the automatic replenishment.

[0065] In one embodiment, a sealing element is provided between the flap 13 and the partition.

[0066] The sealing element can be in the form of a sealing ring or a sealing gasket. The sealing element maintains the sealing between the flap 13 and the partition, and prevents the internal air pressure of the lower chamber 12 from decreasing during the material replenishment process.

[0067] In one embodiment, a steel pipe frame 5 is provided between the pressure tank 1 and the sand collector 2. The steel pipe frame 5 is provided with several sets of wheel frames, each set of wheel frames including a driving wheel at one end and a driven wheel at the other end.

[0068] The number of wheel frames is greater than or equal to the number of sandblasting pipes.

[0069] The steel pipe frame 5 can not only support the small-diameter steel pipe 6, but also drive the small-diameter steel pipe 6 to rotate, thereby improving the sandblasting quality.

[0070] In one embodiment, the steel pipe frame 5 includes a top plate and a base, one end of the top plate is hinged to the base, and the other end of the top plate is provided with a lifting cylinder;

[0071] Several sets of wheels are mounted on the top surface of the top plate.

[0072] The top plate is raised by lifting cylinder, so that the top plate is in an inclined state. The inclination angle is generally in the range of 3~5°, which makes it easier for the sand particles inside the small diameter steel pipe 6 to be discharged into the sand particle collector 2, and the small diameter steel pipe 6 itself will not move.

[0073] In one embodiment, the sandblasting pipe 15 includes a flexible hose section and a rigid pipe section, the flexible hose section being connected to the sand adjusting valve, and the rigid pipe section being used to insert the small-diameter steel pipe 6.

[0074] The rigid pipe section can be coaxially inserted into the small-diameter steel pipe 6, allowing sand particles to be sprayed out evenly from the sandblasting nozzle to ensure the sandblasting effect.

[0075] Based on the above technical solution, the surface of the rigid pipe section is provided with a limiting protrusion, which can be annular or dot-shaped.

[0076] In practical use, the length of the hard pipe section inserted into the small-diameter steel pipe 6 can be determined by the limiting protrusion, so as to ensure the stable sandblasting effect.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A rust removal device for the inner wall of small-diameter steel pipes, characterized in that, include: A pressure tank, which is divided into an upper chamber and a lower chamber, is provided with a partition between the upper chamber and the lower chamber, and a flap is provided on the partition, which is driven by an actuator; The upper chamber and the lower chamber are each provided with a feeding port, and the feeding port is provided with a valve; The upper chamber is provided with a first air injection port, a first air exhaust port, a first pressure sensor, and a first pressure gauge; The lower chamber is equipped with a second air injection port, a second air exhaust port, a second pressure sensor, and a second pressure gauge; The bottom of the lower chamber is provided with several sand outlets, each of which is equipped with a sand regulating valve. One end of the sand regulating valve is connected to a compressed air pipe, and the other end is connected to a sandblasting pipe. The sandblasting pipe is used to insert one end of a small-diameter steel pipe. A controller is located outside the pressure tank and is electrically connected to the first pressure sensor and the second pressure sensor.

2. The rust removal device for the inner wall of small-diameter steel pipes according to claim 1, characterized in that, It also includes a sand collector, which is located at the other end of the small-diameter steel pipe, and the collection port of the sand collector is sleeved outside the other end of the small-diameter steel pipe.

3. The rust removal device for the inner wall of small-diameter steel pipes according to claim 2, characterized in that, The pressure tank is also equipped with a weighing sensor at the bottom, which is electrically connected to the controller.

4. The rust removal device for the inner wall of small-diameter steel pipes according to claim 3, characterized in that, The feeding port of the upper chamber is connected to the conveying pipe, which is connected to one end of the sand conveyor, and the other end of the sand conveyor is located below the sand collector.

5. The rust removal device for the inner wall of small-diameter steel pipes according to claim 1, characterized in that, A sealing element is provided between the flap and the partition.

6. The rust removal device for the inner wall of small-diameter steel pipes according to claim 2, characterized in that, A steel pipe frame is also provided between the pressure tank and the sand recovery device. Several sets of wheel frames are provided on the steel pipe frame. Each set of wheel frames includes a driving wheel at one end and a driven wheel at the other end. The number of wheel frames is greater than or equal to the number of sandblasting pipes.

7. The rust removal device for the inner wall of small-diameter steel pipes according to claim 6, characterized in that, The steel pipe frame includes a top plate and a base. One end of the top plate is hinged to the base, and the other end of the top plate is provided with a lifting cylinder. Several sets of wheels are mounted on the top surface of the top plate.

8. The rust removal device for the inner wall of small-diameter steel pipes according to claim 1, characterized in that, The sandblasting pipe includes a flexible hose section and a rigid hose section. The flexible hose section is connected to the sand adjusting valve, and the rigid hose section is used to insert the small-diameter steel pipe.

9. The rust removal device for the inner wall of small-diameter steel pipes according to claim 8, characterized in that, The surface of the rigid pipe section is provided with limiting protrusions.

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