A pig cold spraying gas regulating device

Abstract

This utility model relates to the field of cold spraying technology, specifically a gas control device for cold spraying of a pig. The utility model includes a main mixing chamber and a feeding assembly. By mixing the powder-feeding gas and the accelerating gas separately inside the main mixing chamber or a side mixing chamber, the mixture is sprayed out after being expanded and contracted by a first Laval nozzle to perform cold spraying on the cylindrical support of the pig body. After being expanded and contracted by a second Laval nozzle, the mixture is sprayed out to perform cold spraying on the flange steel plate on the outer side of the cylindrical support of the pig body. This allows for gradual cold spraying of the entire pig body, reducing the complexity of the cold spraying process. By controlling the rotation of the side mixing chamber, the discharge direction of the second Laval nozzle can be changed, enabling cold spraying at the connection between the cylindrical support and the flange steel plate of the pig body, as well as at flange steel plates of different diameters. It also facilitates cold spraying on both sides of the entire flange steel plate.

Description

Technical Field

[0001] This utility model relates to the field of cold spraying technology, specifically a gas control device for cold spraying of a pipeline pig. Background Technology

[0002] Pipeline pigs are specialized tools propelled by gas, liquid, or pipeline transport media to clean pipelines. Most existing pipeline pigs consist of a pure steel column support, a cup, and a flange plate for installing the cup. The flange plate is welded to the column support. To ensure corrosion resistance during long-term use, the support of the pipeline pig is coated with anti-corrosion paint during the manufacturing process. Cold spraying is the mainstream process for pipeline pig coating.

[0003] In the process of spraying pigs using cold spraying technology, the air outlet of the cold spraying device is directly aligned with the column support of the pig to achieve spraying of the column support. However, since the column support is equipped with a flange steel plate for cup installation, and the plane of the flange steel plate is perpendicular to the central axis of the column support, in order to facilitate one-time spraying of the entire pig, the air outlet of the cold spraying device needs to be installed on a robot, which increases the cost of cold spraying. At the same time, it is not possible to spray both sides of the flange steel plate simultaneously, which increases the complexity of the cold spraying process of the pig. Therefore, we propose a gas control device for cold spraying of pigs. Utility Model Content

[0004] The purpose of this invention is to provide a gas control device for cold spraying of pigging equipment to solve the problems mentioned in the background art.

[0005] The objective of this utility model can be achieved through the following technical solutions: A gas control device for cold spraying of a pigging system includes: a main mixing chamber and a feeding assembly. Side mixing chambers are rotatably mounted on both sides of the main mixing chamber via pivot pins. When the two side mixing chambers rotate, their central axes are in the same plane as the main mixing chamber. The feeding assembly is connected to both side mixing chambers and the main mixing chamber simultaneously via multiple pipes. A first Laval nozzle is fixedly installed at the outlet end of the main mixing chamber, and a second Laval nozzle is fixedly installed at the outlet end of each side mixing chamber. The outlet directions of the first and second Laval nozzles are intersected.

[0006] Preferably, the feeding assembly includes a powder feeding device, a gas heating device, an air inlet pipe, a powder feeding pipe, and a hot gas pipe. The air inlet ends of the powder feeding device and the gas heating device are connected to the air inlet pipe. The powder feeding device is connected to the two side mixing chambers and the main mixing chamber by powder feeding pipes. There are three powder feeding pipes, each of which is connected to the two side mixing chambers and the main mixing chamber respectively. The gas heating device is connected to the two side mixing chambers and the main mixing chamber by hot gas pipes.

[0007] Preferably, a fixed frame is fixedly installed at the bottom of the main mixing chamber, and a movable block that can slide along the axial direction of the main mixing chamber is installed in the middle of the fixed frame. A positioning rod is fixedly installed at the bottom of the side mixing chamber away from the main mixing chamber. Positioning grooves are opened at both ends of the movable block, and the positioning rod is slidably connected to the positioning groove.

[0008] Preferably, a screw is rotatably mounted in the middle of the fixed frame via a bearing, the middle of the moving block is threadedly connected to the screw, limit rods are symmetrically fixedly mounted inside the fixed frame, limit holes are symmetrically opened in the middle of the moving block, the limit holes are slidably connected to the limit rods, a servo motor is fixedly mounted at one end of the fixed frame, and the output end of the servo motor is fixedly connected to one end of the screw via a coupling.

[0009] Preferably, a first electric valve is installed at the end position of each of the three powder inlet pipes near the side mixing chamber and the main mixing chamber, and a second electric valve is installed at the end position of each of the three hot gas pipes near the side mixing chamber and the main mixing chamber.

[0010] Preferably, it further includes: a linear motion component, wherein the main mixing chamber is fixedly connected to the moving end of the linear motion component.

[0011] The beneficial effects of this utility model are: 1. This utility model fixes the pig body on the mounting bracket and controls the rotation of the pig body. By mixing the powder delivery gas and the acceleration gas separately in the main mixing chamber or the side mixing chamber, the supersonic gas and powder mixture is sprayed out after being expanded and contracted by the first Laval nozzle. This causes the spray coating to impact the cylindrical support of the pig body at extremely high speed, achieving a cold spraying operation on the cylindrical support of the pig body. After being expanded and contracted by the second Laval nozzle, the supersonic gas and powder mixture is sprayed out, causing the spray coating to impact the flange steel plate on the outside of the cylindrical support of the pig body at extremely high speed, achieving a cold spraying operation on the flange steel plate on the outside of the cylindrical support of the pig body. The entire pig body can be gradually cold sprayed, reducing the complexity of the cold spraying process.

[0012] 2. This utility model controls the operation of a servo motor to drive the screw to rotate. The moving block is connected to the screw by a thread, which moves the moving block along the trajectory of the limit rod. The side mixing chamber is squeezed by the positioning grooves at different positions on both ends of the moving block, which drives the side mixing chamber to rotate. This changes the discharge direction of the second Laval nozzle, enabling cold spraying operations at the connection between the cylindrical support of the pig body and the flange steel plate, as well as at flange steel plates of different diameters. It also facilitates cold spraying operations on both sides of the entire flange steel plate. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is one of the overall structural schematic diagrams of this utility model; Figure 2 This is the second schematic diagram of the overall structure of this utility model; Figure 3 This is a schematic diagram of the overall exploded structure of this utility model; Figure 4 This is a schematic diagram of the partial explosion structure of this utility model.

[0014] The reference numerals in the figure are as follows: 1. Main mixing chamber; 2. Feeding assembly; 3. Side mixing chamber; 4. First Laval nozzle; 5. Second Laval nozzle; 6. Fixing frame; 7. Moving block; 8. Positioning rod; 9. Screw; 10. Limiting rod; 11. Limiting hole; 12. Servo motor; 13. First electric valve; 14. Second electric valve; 15. Positioning groove; 21. Powder feeding device; 22. Gas heating device; 23. Air inlet pipe; 24. Powder inlet pipe; 25. Hot air pipe; 30. Pig body. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0016] like Figures 1-4As shown, a gas control device for cold spraying a pigging device includes: a main mixing chamber 1 and a feeding assembly 2. Side mixing chambers 3 are rotatably mounted on both sides of the main mixing chamber 1 via pivot pins. When the two side mixing chambers 3 rotate, their central axes are in the same plane as the main mixing chamber 1. The feeding assembly 2 is connected to both side mixing chambers 3 and the main mixing chamber 1 simultaneously via multiple pipes. A first Laval nozzle 4 is fixedly installed at the outlet end of the main mixing chamber 1, and a second Laval nozzle 5 is fixedly installed at the outlet end of the side mixing chambers 3. The outlet directions of the first Laval nozzle 4 and the second Laval nozzle 5 are intersected. This device is applied to cold spraying operations on the pigging device body 30.

[0017] In specific implementation, the pig body 30 is fixed on the mounting bracket and its rotation is controlled. High-pressure gas is divided into two parts through the inlet pipe 23 by the gas-generating device in the cold spraying apparatus. The gas provides power to the powder in the feeding assembly 2 and heats the gas as an accelerating gas. During cold spraying of the outer cylindrical support of the pig body 30, the powder-feeding gas and accelerating gas are mixed inside the main mixing chamber 1. After being expanded and contracted by the first Laval nozzle 4, the supersonic gas and powder mixture is ejected, causing the sprayed material to impact the cylindrical support of the pig body 30 at extremely high speed, thus achieving cold spraying of the cylindrical support of the pig body 30. This process is repeated for each part of the cold spraying process. When cold spraying the flange steel plate, the powder feeding gas and the acceleration gas are mixed inside the side mixing chamber 3. After being expanded and contracted by the second Laval nozzle 5, the supersonic gas and powder mixture is ejected, causing the sprayed material to impact the flange steel plate on the outside of the column support of the pig body 30 at extremely high speed. This achieves cold spraying operation on the flange steel plate on the outside of the column support of the pig body 30. Cold spraying operation can be performed at different diameter positions of the flange steel plate. By controlling the rotation of the side mixing chamber 3, the discharge direction of the second Laval nozzle 5 is changed. Cold spraying operation can be performed at the connection between the column support and the flange steel plate of the pig body 30, as well as at flange steel plates of different diameters. It is convenient to perform cold spraying operation on both sides of the entire flange steel plate.

[0018] As a technical optimization solution of this utility model, such as Figures 1-4As shown, the feeding assembly 2 includes a powder feeding device 21, a gas heating device 22, an air inlet pipe 23, a powder feeding pipe 24, and a hot air pipe 25. The air inlet ends of the powder feeding device 21 and the gas heating device 22 are connected to the air inlet pipe 23. The powder feeding device 21 is connected to the two side mixing chambers 3 and the main mixing chamber 1 by the powder feeding pipe 24. There are three powder feeding pipes 24, and each powder feeding pipe 24 is connected to the two side mixing chambers 3 and the main mixing chamber 1 respectively. The gas heating device 22 is connected to the two side mixing chambers 3 and the main mixing chamber 1 by the hot air pipe 25.

[0019] In specific implementation, the high-pressure gas is divided into two parts by the gas generating device in the cold spraying device through the air inlet pipe 23. One part of the gas is transported to the powder feeding device 21 as the carrier gas for the powder, realizing the power input for the powder. The other part is transported to the gas heating device 22, where the gas is heated by the electric heating component in the gas heating device 22. The heated gas is used as the acceleration gas and can be mixed with high-temperature gas and powder in the main mixing chamber 1 and the side mixing chamber 3 through the powder inlet pipe 24 and the hot gas pipe 25.

[0020] As a technical optimization solution of this utility model, such as Figures 1-4 As shown, a fixed frame 6 is fixedly installed at the bottom of the main mixing chamber 1. A movable block 7 that can slide along the axial direction of the main mixing chamber 1 is installed in the middle of the fixed frame 6. The movable block 7 includes a straight section and an inclined section. A positioning rod 8 is fixedly installed at the bottom of the side mixing chamber 3 away from the main mixing chamber 1. A positioning groove 15 is opened on the movable block 7 at the position corresponding to the inclined section. The positioning rod 8 is slidably connected to the positioning groove 15. Guided by the positioning groove 15, the side mixing chamber 3 can rotate between -10 degrees and +30 degrees relative to the main mixing chamber 1. The positioning rod 8 is slidably connected to the positioning groove 15.

[0021] In practice, cold spraying is performed on different diameter locations of the flange steel plate. By controlling the moving block 7 to move in the middle of the fixed frame 6, the side mixing chamber 3 will be squeezed by the positioning grooves 15 at different positions on both ends of the moving block 7, which will drive the side mixing chamber 3 to rotate, thereby changing the discharge direction of the second Laval nozzle 5. This allows for cold spraying operations on the connection between the columnar support of the pig body 30 and the flange steel plate, as well as on flange steel plates of different diameters.

[0022] As a technical optimization solution of this utility model, such as Figures 1-4As shown, a screw 9 is rotatably mounted in the middle of the fixed frame 6 via a bearing, and the middle of the moving block 7 is threadedly connected to the screw 9. Limiting rods 10 are symmetrically fixedly mounted inside the fixed frame 6, and limiting holes 11 are symmetrically opened in the middle of the moving block 7. The limiting holes 11 are slidably connected to the limiting rods 10. A servo motor 12 is fixedly mounted at one end of the fixed frame 6, and the output end of the servo motor 12 is fixedly connected to one end of the screw 9 via a coupling.

[0023] In practice, the servo motor 12 is controlled to rotate the screw 9, and the moving block 7 is moved along the trajectory of the limit rod 10 through the threaded connection between the moving block 7 and the screw 9.

[0024] As a technical optimization solution of this utility model, such as Figures 1-4 As shown, a first electric valve 13 is installed at the end position of each of the three powder inlet pipes 24 near the end position of the side mixing chamber 3 and the main mixing chamber 1, and a second electric valve 14 is installed at the end position of each of the three hot air pipes 25 near the end position of the side mixing chamber 3 and the main mixing chamber 1. The first electric valve 13 and the second electric valve 14 are used to control the feeding of the powder inlet pipes 24 and the hot air pipes 25 respectively. The first electric valve 13 and the second electric valve 14 are electrically connected to the control component and can close and open the powder inlet pipes 24 and the hot air pipes 25.

[0025] In practice, the channels of the powder inlet pipe 24 and the hot gas pipe 25 connected to the main mixing chamber 1 and the side mixing chamber 3 can be opened or closed by controlling the first electric valve 13 and the second electric valve 14.

[0026] As a technical optimization solution of this utility model, such as Figures 1-4 As shown, it also includes: a linear motion component, wherein the main mixing chamber 1 is fixedly connected to the moving end of the linear motion component, and the linear motion component may be a screw drive component or a hydraulic drive component, etc.

[0027] In practice, the main mixing chamber 1 and the side mixing chamber 3 in this device can be moved by the operation of the linear moving component, thereby realizing the cold spraying operation on the entire pig body 30.

[0028] In use, the pig body 30 is fixed on the mounting bracket and its rotation is controlled. High-pressure gas is divided into two parts via the gas-generating device in the cold spraying apparatus, passing through the inlet pipe 23. One part is sent to the powder feeding device 21 as the carrier gas for the powder, providing power input. The other part is sent to the gas heating device 22, where the gas is heated by an electric heating component. The heated gas is then used as the acceleration gas. During cold spraying of the outer side of the cylindrical bracket of the pig body 30, the powder inlet pipe 24 and hot gas pipe 25 connected to the side mixing chamber 3 are closed by the control of the first electric valve 13 and the second electric valve 14, while the powder inlet pipe 24 and hot gas pipe 25 connected to the main mixing chamber 1 are opened. The powder feeding gas and the acceleration gas are mixed inside the main mixing chamber 1. The first Laval nozzle 4, after scaling, ejects a supersonic gas and powder mixture, causing the sprayed material to impact the cylindrical support of the pig body 30 at extremely high speed, thus achieving a cold spraying operation on the cylindrical support of the pig body 30. When performing cold spraying on the flange steel plate on the outside of the cylindrical support of the pig body 30, the channels of the powder inlet pipe 24 and the hot gas pipe 25 connected to the side mixing chamber 3 are opened by the control of the first electric valve 13 and the second electric valve 14, and the channels of the powder inlet pipe 24 and the hot gas pipe 25 connected to the main mixing chamber 1 are closed. The powder delivery gas and the acceleration gas will be mixed inside the side mixing chamber 3, and after scaling, the second Laval nozzle 5 ejects a supersonic gas and powder mixture, causing the sprayed material to impact the flange steel plate on the outside of the cylindrical support of the pig body 30 at extremely high speed, thus achieving a cold spraying operation on the flange steel plate on the outside of the cylindrical support of the pig body 30. Cold spraying is performed on different diameter locations of the flange steel plate. The servo motor 12 is controlled to drive the screw 9 to rotate. The moving block 7 is moved along the trajectory of the limit rod 10 through the threaded connection between the moving block 7 and the screw 9. The side mixing chamber 3 is squeezed by the positioning grooves 15 at different positions on both ends of the moving block 7, which will drive the side mixing chamber 3 to rotate, thereby changing the discharge direction of the second Laval nozzle 5. Cold spraying can be performed on the connection between the column bracket of the pig body 30 and the flange steel plate, as well as on the flange steel plate at different diameters. It is convenient to perform cold spraying on both sides of the entire flange steel plate.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A pig cold spray gas regulation device, comprising: The main mixing chamber (1) and the feeding assembly (2) are characterized in that side mixing chambers (3) are rotatably installed on both sides of the main mixing chamber (1) through a pivot pin; when the two side mixing chambers (3) rotate, the central axis of the side mixing chambers (3) and the main mixing chamber (1) is in the same plane; the feeding assembly (2) is connected to the two side mixing chambers (3) and the main mixing chamber (1) through multiple pipes; a first Laval nozzle (4) is fixedly installed at the discharge end of the main mixing chamber (1); a second Laval nozzle (5) is fixedly installed at the discharge end of the side mixing chamber (3); and the discharge direction of the first Laval nozzle (4) and the discharge direction of the second Laval nozzle (5) are intersected.

2. The pig cold spraying gas regulating device of claim 1, wherein, The feeding assembly (2) includes a powder feeding device (21), a gas heating device (22), an air inlet pipe (23), a powder feeding pipe (24), and a hot air pipe (25). The air inlet ends of the powder feeding device (21) and the gas heating device (22) are connected to the air inlet pipe (23). The powder feeding device (21) is connected to the two side mixing chambers (3) and the main mixing chamber (1) by the powder feeding pipe (24). There are three powder feeding pipes (24). Each powder feeding pipe (24) is connected to the two side mixing chambers (3) and the main mixing chamber (1) respectively. The gas heating device (22) is connected to the two side mixing chambers (3) and the main mixing chamber (1) by the hot air pipe (25).

3. The pig cold spray gas regulation device of claim 2, wherein, A fixed frame (6) is fixedly installed at the bottom of the main mixing chamber (1). A movable block (7) that can slide along the axial direction of the main mixing chamber (1) is installed in the middle of the fixed frame (6). The movable block (7) includes a straight section and an inclined section. A positioning rod (8) is fixedly installed at the bottom of the side mixing chamber (3) away from the main mixing chamber (1). A positioning groove (15) is opened on the movable block (7) at the position corresponding to the inclined section. The positioning rod (8) is slidably connected to the positioning groove (15).

4. The pig cold spray gas regulation device of claim 3, wherein, A screw (9) is rotatably mounted on the middle part of the fixed frame (6) via a bearing. The middle part of the moving block (7) is threadedly connected to the screw (9). Limiting rods (10) are symmetrically fixedly mounted inside the fixed frame (6). Limiting holes (11) are symmetrically opened in the middle part of the moving block (7). The limiting holes (11) are slidably connected to the limiting rods (10). A servo motor (12) is fixedly mounted on one end of the fixed frame (6). The output end of the servo motor (12) is fixedly connected to one end of the screw (9) via a coupling.

5. The pig cold spray gas regulation device of claim 2, wherein, Each of the three powder inlet pipes (24) is equipped with a first electric valve (13) at the end position near the side mixing chamber (3) and the main mixing chamber (1), and each of the three hot air pipes (25) is equipped with a second electric valve (14) at the end position near the side mixing chamber (3) and the main mixing chamber (1).

6. A pig cold spray gas regulation device according to claim 5, wherein, Also includes: The linear moving assembly is fixedly connected with a moving end of the linear moving assembly.

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