A metal surface treatment sand blasting device

Abstract

The application is suitable for the technical field of metal surface treatment, and provides a metal surface treatment sand blasting device, which comprises a pipe body with a pipe cavity, the pipe cavity has a discharge port, the pipe body is provided with a gas inlet pipe and a sand inlet pipe which are communicated with the pipe cavity; a liquid pipe is arranged in the pipe cavity, a first end of the liquid pipe extends from the discharge port to outside of the pipe cavity, and a second end of the liquid pipe is used for connecting a liquid supply device; a guide cone is arranged at the first end of the liquid pipe and is arranged opposite to the discharge port, one end of the guide cone close to the discharge port is a conical surface, the conical surface is used for changing the movement direction of the sand material blasted from the discharge port, so that the sand material has a velocity component along the radial direction of the pipe body, an internal part of the guide cone is provided with a liquid storage cavity which is communicated with the liquid pipe, and the conical surface is provided with a liquid outlet hole which is communicated with the liquid storage cavity. The blasted sand material collides with the conical surface of the guide cone, and a velocity component along the radial direction of the pipe body is generated. The water liquid sucked by the liquid outlet hole is atomized under the impact of high-speed jet flow, adsorbs a large amount of dust in the air generated by sand blasting, and reduces the amount of dust suspended in the oil pipe.

Description

Technical Field

[0001] This application belongs to the field of metal surface treatment technology, and particularly relates to a metal surface treatment sandblasting device. Background Technology

[0002] Oil pipelines are a crucial component of the oil and natural gas energy industry. The corrosion resistance, wear resistance, and drag reduction properties of their inner walls directly affect the service life and transportation efficiency of the pipelines. To improve pipeline performance, anti-corrosion coatings are typically installed. Before applying an anti-corrosion coating to the inner wall of an oil pipe, it is necessary to sandblast the inner wall to remove oxide scale, dust, and other adhering substances, ensuring the inner wall meets technical requirements and guaranteeing the adhesion between the anti-corrosion coating and the metal substrate. However, the inner wall of an oil pipe is narrow and long, making it difficult for a normal forward-spraying sandblasting device to change direction within the pipe, resulting in poor sandblasting effect and generating a significant amount of dust inside the pipe after sandblasting. Utility Model Content

[0003] The purpose of this application is to provide a metal surface treatment sandblasting device, which aims to solve the problems of poor sandblasting effect of existing sandblasting devices on the inner wall of oil pipes and the generation of a lot of dust on the inner wall of oil pipes after sandblasting.

[0004] The embodiments of this application are implemented as follows: a metal surface treatment sandblasting device includes a pipe body, the pipe body having a cavity, the cavity having a discharge port, the pipe body being provided with an air inlet pipe and a sand inlet pipe communicating with the cavity, the air inlet pipe being used to connect to an air supply device, and the sand inlet pipe being used to connect to a sand supply device. A liquid pipe is provided in the cavity, with a first end extending from the outlet to the outside of the cavity, and a second end for connecting to a liquid supply device; A guide cone is fixed to the first end of the liquid pipe and arranged opposite to the outlet. The end of the guide cone near the outlet is a conical surface. The conical surface is used to change the movement direction of the sand material ejected from the outlet, so that the sand material has a velocity component along the radial direction of the pipe. The inside of the guide cone is provided with a liquid storage cavity that communicates with the liquid pipe, and the conical surface is provided with an outlet hole that communicates with the liquid storage cavity.

[0005] In some preferred embodiments of this application, two sets of support components are symmetrically arranged on the outer periphery of the tube body. The support components include at least three support feet, a connecting rod, and a drive ring. One end of the support foot is hinged to the tube body, and the other end is provided with a roller. The drive ring is sleeved on the outside of the tube body and can slide relative to the tube body. One end of the connecting rod is hinged to the middle of the support foot, and the other end is hinged to the drive ring.

[0006] In some preferred embodiments of this application, a spring is fitted on the pipe body, one end of the spring is fixedly connected to the drive ring, and the other end is fixedly connected to the pipe body. The spring is used to drive the drive ring to move so that the support foot abuts against the inner wall of the oil pipe.

[0007] In some preferred embodiments of this application, the pipe body is further provided with a sealing element, the outer periphery of which is used to abut against the inner wall of the oil pipe.

[0008] In some preferred embodiments of this application, a protective tube is also sleeved on the outside of the liquid tube.

[0009] In some preferred embodiments of this application, the end of the tube near the discharge port is further provided with an inner liner tube with openings at both ends. The outer wall of the inner liner tube is threaded to the inner wall of the tube cavity, and the diameter of the inner liner tube first decreases and then increases towards the discharge port.

[0010] In some preferred embodiments of this application, a connecting pipe is threaded to one end of the tube body away from the outlet. One end of the connecting pipe is connected to the tube body, and the other end is closed by an end cap. The liquid tube is fixed to the end cap and extends through the end cap to the outside of the connecting pipe for connecting to a liquid supply device.

[0011] This application provides a metal surface treatment sandblasting device. Compressed gas from an air supply device enters the pipe body, forming a high-speed jet that drives sand material at high speed, which is then ejected from the outlet. The ejected sand material impacts the conical surface of a guide cone, generating a radial velocity component along the pipe body. This allows the sand material to move towards the inner wall of the oil pipe and impact it, removing the oxide film. Additionally, the high-speed jet generates negative pressure on the guide cone surface, drawing water from the guide cone's reservoir cavity through the outlet. Furthermore, the water is atomized under the impact of the high-speed jet, adsorbing a large amount of dust generated during sandblasting and reducing the amount of suspended dust inside the oil pipe. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a metal surface treatment sandblasting device provided in an embodiment of this application; Figure 2 A cross-sectional view of a metal surface treatment sandblasting apparatus provided in an embodiment of this application; Figure 3 This is a schematic diagram of another perspective of the structure of a metal surface treatment sandblasting device provided in an embodiment of this application; Figure 4 This is a schematic diagram of the structure of the guide cone provided in an embodiment of this application.

[0013] In the picture: 10. Oil pipe; 100. Pipe body; 101. Pipe cavity; 110. Sand inlet pipe; 200. Connecting pipe; 210. Air inlet pipe; 220. Liquid pipe; 221. Protective pipe; 230. End cap; 300. Guide cone; 310. Liquid outlet; 400. Inner liner pipe; 510. Support foot; 511. Roller; 520. Connecting rod; 530. Drive ring; 540. Spring; 600. Seal. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0015] The specific implementation of this application will be described in detail below with reference to specific embodiments.

[0016] like Figures 1 to 4 The diagram shown is a structural schematic of a metal surface treatment sandblasting device provided in an embodiment of this application. The sandblasting device includes: a pipe body 100, a liquid pipe 220, and a guide cone 300.

[0017] like Figure 1 and Figure 2 As shown, the pipe body 100 has a cavity 101, the cavity 101 has a discharge port, the pipe body 100 is provided with an air inlet pipe 210 and a sand inlet pipe 110 communicating with the cavity 101, the air inlet pipe 210 is used to connect to an air supply device, and the sand inlet pipe 110 is used to connect to a sand supply device.

[0018] In this embodiment, the air supply device can be an air compressor, providing high-pressure compressed air. The sand supply device is a pressure tank, which stores sand. The sand supply device uses the pressure inside the tank to push the sand into the pipe 100. In some other embodiments, a self-priming method can also be used for sand feeding. The vacuum generated by the high-speed flow of compressed air through the pipe 100 draws out the sand stored in the tank, mixes it with air in the pipe 100, and then sprays it out. In this embodiment, the compressed air enters the pipe 100 and forms a high-speed jet, which drives the sand to move at high speed and is then sprayed out from the outlet.

[0019] like Figure 1 and Figure 2 As shown, a liquid pipe 220 is disposed in the cavity 101. The first end of the liquid pipe 220 extends from the outlet to the outside of the cavity 101, and the second end of the liquid pipe 220 is used to connect to a liquid supply device. In some embodiments, the liquid pipe 220 extends along the axis of the pipe body 100 and is fixed to the pipe body 100. The liquid supply device can be a water storage tank, and the water storage tank and the liquid pipe 220 can be connected via a flexible hose.

[0020] like Figure 1 and Figure 4 As shown, the guide cone 300 is fixed to the first end of the liquid pipe 220 and arranged opposite to the discharge port. The end of the guide cone 300 near the discharge port is a conical surface. The conical surface is used to change the movement direction of the sand material ejected from the discharge port, so that the sand material has a velocity component along the radial direction of the pipe body 100. The inside of the guide cone 300 is provided with a liquid storage cavity that communicates with the liquid pipe 220, and the conical surface is provided with a liquid outlet hole 310 that communicates with the liquid storage cavity.

[0021] In this embodiment, the compressed gas supplied by the gas supply device enters the pipe body 100 and forms a high-speed jet, which drives the sand material to move at high speed and is ejected from the outlet. The ejected sand material impacts the conical surface of the guide cone 300, generating a velocity component along the radial direction of the pipe body 100. This allows the sand material to move towards the inner wall of the oil pipe 10 and impact the inner wall of the oil pipe 10, removing the oxide film from the oil pipe 10. In addition, the high-speed jet passes over the surface of the guide cone 300 to generate negative pressure, drawing the water in the liquid storage chamber of the guide cone 300 out from the liquid outlet 310. Furthermore, the water is atomized under the impact of the high-speed jet, adsorbing a large amount of dust generated in the air due to sandblasting, reducing the amount of dust suspended in the oil pipe 10.

[0022] In some embodiments of this application, such as Figure 1 and Figure 2 As shown, two sets of support assemblies are symmetrically arranged on the outer periphery of the tube body 100. The support assembly includes at least three support feet 510, a connecting rod 520, and a drive ring 530. One end of the support foot 510 is hinged to the tube body 100, and the other end is provided with a roller 511. The drive ring 530 is sleeved on the outside of the tube body 100 and can slide relative to the tube body 100. One end of the connecting rod 520 is hinged to the middle of the support foot 510, and the other end is hinged to the drive ring 530.

[0023] In this embodiment, as Figure 3 As shown, the three support legs 510 of the support assembly abut against the inner wall of the oil pipe 10, keeping the pipe body 100 in a centrally located and stable state within the oil pipe 10. Additionally, the support legs 510 abut against the inner wall of the oil pipe 10 via rollers 511, allowing the entire sandblasting device to move within the oil pipe 10, enabling sandblasting of the entire inner wall of the oil pipe 10. In some embodiments of this application, the sandblasting device can be manually moved within the oil pipe 10 using a push rod, or the rollers 511 can be directly driven to rotate by a motor.

[0024] In some embodiments of this application, such as Figure 1 and Figure 2As shown, a spring 540 is fitted onto the pipe body 100. One end of the spring 540 is fixedly connected to the drive ring 530, and the other end is fixedly connected to the pipe body 100. The spring 540 drives the drive ring 530 to move, thereby causing the support foot 510 to abut against the inner wall of the oil pipe 10. In this embodiment, the spring 540 drives the drive ring 530 to move axially along the pipe body 100. The drive ring 530 pushes the support foot 510 to rotate through the connecting rod 520 until the roller 511 abuts against the inner wall of the oil pipe 10, ensuring stable support for the pipe body 100.

[0025] In some embodiments of this application, such as Figure 1 and 2 As shown, a sealing element 600 is also provided on the pipe body 100, and the outer periphery of the sealing element 600 is used to abut against the inner wall of the oil pipe 10. In this embodiment, the annular sealing ring can guide water mist and dust out of the oil pipe 10, ensuring the cleanliness of the inside of the pipe and facilitating subsequent coating processes.

[0026] In some embodiments of this application, such as Figure 2 As shown, a protective tube 221 is also sleeved on the outside of the liquid pipe 220. Specifically, the protective tube 221 is made of a wear-resistant material, such as a ceramic composite material. In this embodiment, because the sand passes through quickly, it is easy to cause frictional wear to the liquid pipe 220. Protecting the liquid pipe 220 with the protective tube 221 can effectively improve the service life of the liquid pipe 220.

[0027] In some embodiments of this application, the end of the cavity 101 near the discharge port is provided with an inner liner 400 with openings at both ends. The outer wall of the inner liner 400 is threaded to the inner wall of the cavity 101, and the diameter of the inner liner 400 first decreases and then increases towards the discharge port.

[0028] In this embodiment, the inner liner 400 is used to change the inner diameter of the cavity 101. The diameter narrows in the outlet direction, which can increase the pressure inside the cavity 101 and increase the sand injection speed. The diameter then increases again, which can guide the sand injection direction and make the sand injection more uniform.

[0029] In some embodiments of this application, a connecting pipe 200 is threadedly connected to the end of the pipe body 100 away from the outlet. One end of the connecting pipe 200 communicates with the pipe body 100, and the other end is closed by an end cap 230. The liquid pipe 220 is fixed to the end cap 230 and extends through the end cap 230 to the outside of the connecting pipe 200 for connecting to a liquid supply device. An air inlet pipe 210 is provided on the connecting pipe 200. In this embodiment, the liquid pipe 220 can be easily maintained or the protective pipe 221 can be replaced by unscrewing the connecting pipe 200.

[0030] This application provides a metal surface treatment sandblasting device. Compressed gas from the gas supply equipment enters the pipe 100, forming a high-speed jet that drives the sand material at high speed and ejects it from the outlet. The ejected sand material impacts the conical surface of the guide cone 300, generating a radial velocity component along the pipe 100. This allows the sand material to move towards the inner wall of the oil pipe 10 and impact it, removing the oxide film from the oil pipe 10. Furthermore, the high-speed jet passes over the surface of the guide cone 300 to generate negative pressure, drawing water from the liquid storage chamber of the guide cone 300 out through the outlet 310. The water is also atomized under the impact of the high-speed jet, adsorbing a large amount of dust generated in the air due to sandblasting, thus reducing the amount of suspended dust inside the oil pipe 10.

[0031] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A metal surface treatment sandblasting device, characterized in that, include: The pipe body has a cavity, the cavity has a discharge port, and the pipe body is provided with an air inlet pipe and a sand inlet pipe communicating with the cavity. The air inlet pipe is used to connect to an air supply device, and the sand inlet pipe is used to connect to a sand supply device. A liquid pipe is provided in the cavity, with a first end extending from the outlet to the outside of the cavity, and a second end for connecting to a liquid supply device; A guide cone is fixed to the first end of the liquid pipe and arranged opposite to the outlet. The end of the guide cone near the outlet is a conical surface. The conical surface is used to change the movement direction of the sand material ejected from the outlet, so that the sand material has a velocity component along the radial direction of the pipe. The inside of the guide cone is provided with a liquid storage cavity that communicates with the liquid pipe, and the conical surface is provided with an outlet hole that communicates with the liquid storage cavity.

2. The metal surface treatment sandblasting device according to claim 1, characterized in that, Two sets of support components are symmetrically arranged on the outer periphery of the tube. Each support component includes at least three support feet, a connecting rod, and a drive ring. One end of each support foot is hinged to the tube body, and the other end is provided with a roller. The drive ring is sleeved on the outside of the tube body and can slide relative to the tube body. One end of each connecting rod is hinged to the middle of the support foot, and the other end is hinged to the drive ring.

3. The metal surface treatment sandblasting device according to claim 2, characterized in that, A spring is fitted onto the pipe body. One end of the spring is fixedly connected to the drive ring, and the other end is fixedly connected to the pipe body. The spring is used to drive the drive ring to move so that the support foot abuts against the inner wall of the oil pipe to be processed.

4. The metal surface treatment sandblasting device according to claim 1, characterized in that, The pipe body is also provided with a sealing element, the outer periphery of which is used to abut against the inner wall of the oil pipe.

5. A metal surface treatment sandblasting device according to claim 1, characterized in that, A protective tube is also fitted on the outside of the liquid tube.

6. The metal surface treatment sandblasting device according to claim 1, characterized in that, The end of the tube near the discharge port is also provided with an inner liner tube with openings at both ends. The outer wall of the inner liner tube is threaded to the inner wall of the tube cavity. The diameter of the inner liner tube first decreases and then increases towards the discharge port.

7. The metal surface treatment sandblasting device according to claim 1, characterized in that, The end of the tube body away from the outlet is threaded with a connecting pipe. One end of the connecting pipe is connected to the tube body, and the other end is sealed by an end cap. The liquid tube is fixed to the end cap and extends through the end cap to the outside of the connecting pipe for connecting to a liquid supply device.

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