In-pipe powder spraying device

Abstract

The utility model relates to an in-pipe powder spraying device which comprises a rotating motor, a spraying rotating cup and a feeding pipe, the rotating motor is in driving connection with the spraying rotating cup, a cavity is formed in the spraying rotating cup, and an outlet of the feeding pipe is located in the cavity; the spraying rotary cup is provided with a plurality of sets of discharging oblique openings distributed in the circumferential direction of the columnar face, at least one set of discharging oblique openings incline in the first direction, at least one set of discharging oblique openings incline in the second direction opposite to the first direction, and the number of the discharging oblique openings inclining in the first direction is smaller than that of the discharging oblique openings inclining in the second direction. Compared with the prior art, the powder spraying device has the advantages of being uniform in spraying, adjustable in powder outlet amount and the like.

Description

Technical Field

[0001] This utility model relates to the field of powder coating equipment, and in particular to an in-pipe powder coating equipment. Background Technology

[0002] In the internal coating production process, in addition to applying internal coatings to oil drilling tools and tubing, it is also necessary to apply internal coatings to large-diameter conveying pipes with an outer diameter of φ325mm~φ406mm. Existing production lines cannot perform internal powder coating on large-diameter pipes. To meet production demands, a powder spraying head device for large-diameter pipes is needed to achieve internal powder coating and overcome the aforementioned production limitations.

[0003] For example, the utility model with publication number CN202778850U discloses a high-speed rotating pipe spraying device with a rotary cup, including an AC motor driver, a high-speed motor and a rotary cup nozzle. The AC motor driver is connected to the high-speed motor and is used to drive the high-speed motor to work. The rotary cup nozzle is fixed on the high-speed motor and drives the rotary cup nozzle to rotate through the high-speed motor.

[0004] However, the existing spraying devices described above suffer from the problem that the densely packed orifices of the external rotary cup nozzle can become clogged with paint residue or particles during the spraying process, requiring frequent disassembly and cleaning. This is especially problematic when spraying large-diameter pipes, leading to low spraying efficiency and inconvenient nozzle disassembly and maintenance. Furthermore, the densely packed orifices of the external rotary cup nozzle limit the output volume, resulting in a fixed and unadjustable output volume and low operational flexibility. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology, which has the limitation of the output volume due to the dense small holes of the external rotating cup nozzle, resulting in a single and unadjustable output volume and low flexibility of use, and to provide an in-tube powder spraying device.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] An in-pipe powder coating device includes a rotary motor, the device further includes a coating rotary cup and a feed pipe, the rotary motor drives and connects to the coating rotary cup, the coating rotary cup has a cavity, and the outlet of the feed pipe is located in the cavity;

[0008] The spraying rotary cup is provided with multiple sets of discharge angled outlets distributed circumferentially along the columnar surface. At least one set of discharge angled outlets is inclined in a first direction, and at least one set of discharge angled outlets is inclined in a second direction opposite to the first direction. The number of discharge angled outlets inclined in the first direction is less than the number of discharge angled outlets inclined in the second direction.

[0009] Preferably, there are multiple feed tubes, each evenly distributed around the circumference of the rotary motor. The rotary motor is detachably mounted with a bracket, which has mounting holes through which the feed tubes pass.

[0010] Preferably, the outlet end of the feed pipe is spoon-shaped, the outlet end of the feed pipe is inclined toward the rotation axis of the spraying rotary cup, and the angle between the upper end face of the spoon-shaped outlet of the feed pipe and the rotation axis of the spraying rotary cup is in the range of 40-50 degrees.

[0011] Preferably, each set of discharge angled nozzles is coaxially arranged with the spray coating rotary cup, and the discharge angled nozzles of each set are parallel to each other, with the discharge angled nozzles of adjacent sets being staggered.

[0012] Preferably, the ratio of the number of discharge sloping openings inclined in the first direction to the number of discharge sloping openings inclined in the second direction is between 1-3 and 1-4.

[0013] Preferably, the discharge angles inclined in the first direction are distributed adjacent to each other at the end of the spraying cup near the rotating motor, and the discharge angles inclined in the second direction are distributed adjacent to each other at the end of the spraying cup away from the rotating motor.

[0014] Preferably, the angle between the extended axis of the inclined discharge port in the first direction and the tangent at the contact point of the cylindrical surface of the spraying cup is in the range of 20-40 degrees.

[0015] Preferably, the cavity of the spraying rotary cup is provided with a mounting post, the mounting post is coaxially arranged with the spraying rotary cup, and the output shaft of the rotary motor is connected to the mounting post.

[0016] Preferably, the mounting post has a mounting cavity at one end near the rotary motor, the mounting cavity has an internal thread, and the output shaft of the rotary motor is threadedly connected to the mounting cavity.

[0017] Preferably, the rotary motor is a high-speed motor, and the rotational speed of the rotary motor is greater than 10000 r / min.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] (1) In this scheme, the rotary motor drives the spraying rotary cup to rotate at high speed. The powder to be sprayed enters the cavity of the spraying rotary cup along the feed pipe. The high-speed rotating spraying rotary cup centrifugally throws the powder out and evenly coats the inner wall of the tube through the discharge inclined port. Moreover, when the powder is discharged from the discharge inclined port in one of the inclined directions, the powder is not discharged from the discharge inclined port in the opposite inclined direction. The discharge amount of the discharge inclined port is adjusted based on the difference in the number of discharge inclined ports in the two directions.

[0020] A rotary motor drives the spray cup to rotate at high speed, centrifugally ejecting the powder from the cavity. The powder is then evenly coated onto the inner wall of the tube through the inclined discharge port, resulting in uniform coating and high efficiency. Furthermore, the spray cup has two inclined discharge ports, but only one direction can be discharged during rotation. This allows for adjustment of the discharge rate based on the difference in the number of these two types of ports, making adjustment convenient and providing greater flexibility in use.

[0021] (2) In this scheme, the outlet end of the discharge pipe is bent toward the center of the spraying rotary cup, and the outlet end of the discharge pipe is set in the shape of a spoon. The spoon-shaped outlet end is at a certain angle, so that the powder is thrown out at a certain angle upward through the outlet end, and then centrifugally thrown out at a specific angle along the discharge oblique hole of the cylindrical surface of the high-speed rotating spraying rotary cup, thereby improving the spraying quality inside the pipe.

[0022] (3) In this solution, the spraying rotary cup is driven to rotate by a rotary motor, and the material is fed into the cavity inside the spraying rotary cup by the discharge pipe. The centrifugal force during the rotation of the spraying rotary cup is used to throw the powder onto the inner wall of the pipe. The spraying efficiency is high, the structure is simple, and the maintenance cost is low. Attached Figure Description

[0023] Figure 1 A schematic diagram of the spraying device provided by this utility model;

[0024] Figure 2 A front view of the spraying device provided by this utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the spray coating rotary cup provided by this utility model;

[0026] Figure 4 This is a front view of the spray coating rotary cup provided by this utility model;

[0027] Figure 5 for Figure 4 AA section view in the middle;

[0028] In the diagram: 1. Spraying rotary cup, 2. Feed pipe, 3. Support, 4. Rotary motor, 5. Discharge slant, 11. Cavity. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0031] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0032] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] It should be noted that the terms "first" and "second" 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0034] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0035] Example 1

[0036] like Figures 1 to 3 As shown, this embodiment provides an in-pipe powder spraying device, including a rotary motor 4, a spraying rotary cup 1 and a feed pipe 2. The rotary motor 4 drives the spraying rotary cup 1, and the spraying rotary cup 1 is provided with a cavity 11. The outlet of the feed pipe 2 is located in the cavity 11.

[0037] The spraying rotary cup 1 is provided with multiple sets of discharge angled nozzles 5 distributed circumferentially along the columnar surface. At least one set of discharge angled nozzles 5 is inclined in a first direction, and at least one set of discharge angled nozzles 5 is inclined in a second direction opposite to the first direction. The number of discharge angled nozzles 5 inclined in the first direction is less than the number of discharge angled nozzles 5 inclined in the second direction.

[0038] Working principle: The rotary motor 4 drives the spray cup 1 to rotate at high speed. The powder to be sprayed enters the cavity 11 of the spray cup 1 along the feed pipe 2. The high-speed rotating spray cup 1 centrifugally throws the powder out and evenly coats the inner wall of the pipe through the discharge angle 5. Moreover, when no material is discharged from one of the discharge angles 5 in one of the inclined directions, material can be discharged from the discharge angle 5 in the opposite inclined direction. The discharge rate of the discharge angle 5 is adjusted based on the difference in the number of discharge angles 5 in the two directions.

[0039] The rotary motor 4 drives the spray cup 1 to rotate at high speed, centrifugally ejecting the powder from the cavity 11. The powder is then evenly coated onto the inner wall of the tube through the discharge angled nozzle 5, resulting in uniform spraying and high efficiency. Furthermore, the two inclined nozzles 5 on the spray cup 1 can only discharge from one direction during rotation. This allows for adjustment of the discharge volume based on the difference in the number of the two types of nozzles 5, making adjustment convenient and providing greater flexibility in use.

[0040] Preferred implementation methods, such as Figure 1 and Figure 2 As shown, there are multiple feed pipes 2, and each feed pipe 2 is evenly distributed around the circumference of the rotary motor 4. A bracket 3 is detachably mounted on the rotary motor 4, and the bracket 3 is provided with mounting holes through which the feed pipes 2 pass.

[0041] Furthermore, the outlet end of the feed pipe 2 is spoon-shaped, and the outlet end of the feed pipe 2 is inclined towards the rotation axis of the spraying rotary cup 1. The angle between the upper end face of the spoon-shaped outlet of the feed pipe 2 and the rotation axis of the spraying rotary cup 1 is 40-50 degrees.

[0042] The outlet end of the discharge pipe is bent towards the center of the spraying rotary cup, and the outlet end of the discharge pipe is set in the shape of a spoon. The spoon-shaped outlet end is at a certain angle, so that the powder is thrown out at a certain angle upward through the outlet end, and then centrifugally thrown out at a specific angle along the discharge oblique hole on the cylindrical surface of the high-speed rotating spraying rotary cup, thereby improving the spraying quality inside the pipe.

[0043] Preferred implementation methods, such as Figures 3 to 5 As shown, each set of discharge angled nozzles 5 is coaxially arranged with the spraying rotary cup 1, and each set of discharge angled nozzles 5 is parallel to each other, with the discharge angled nozzles 5 of adjacent sets being staggered.

[0044] Furthermore, the ratio of the number of discharge angled outlets 5 inclined in the first direction to the number of discharge angled outlets 5 inclined in the second direction is between 1-3 and 1-4. This ratio can be specifically set according to the needs of in-pipe spraying.

[0045] Specifically, the discharge inlets 5 inclined in the first direction are distributed adjacent to each other at the end of the spraying cup 1 near the rotating motor 4, and the discharge inlets 5 inclined in the second direction are distributed adjacent to each other at the end of the spraying cup 1 away from the rotating motor 4.

[0046] The angle between the extended axis of the discharge oblique opening 5, which is inclined in the first direction, and the tangent at the contact point of the columnar surface of the spraying rotary cup 1 is in the range of 20-40 degrees.

[0047] Specifically, the cavity 11 of the spraying rotary cup 1 is provided with a mounting post, which is coaxially arranged with the spraying rotary cup 1, and the output shaft of the rotary motor 4 is connected to the mounting post.

[0048] Furthermore, a mounting cavity is provided at the end of the mounting column near the rotary motor 4, and an internal thread is provided inside the mounting cavity. The output shaft of the rotary motor 4 is threadedly connected to the mounting cavity. In this structure, the spraying rotary cup 1 is reliably fixed while being easy to disassemble and clean.

[0049] Among them, the rotary motor 4 is a high-speed motor with a rotational speed greater than 10,000 r / min. Moreover, this rotary motor is a high-temperature resistant, explosion-proof, and high-magnetic motor, which can adapt to the working environment of the spraying rotary cup 1 and ensure the reliability of long-term operation.

[0050] In conjunction with the preferred embodiments described above, this embodiment provides a more specific implementation method, such as... Figures 1 to 5 As shown, a powder coating device for the inner wall of large-diameter pipes is disclosed. This device is capable of powder coating the inner wall of pipes with an outer diameter of 325 mm to 406 mm. At the front end of the powder coating device, a spraying rotary cup 1 is installed. The spraying rotary cup is driven to rotate by a high-speed motor (i.e., a rotary motor 4). Six copper material tubes (i.e., discharge pipes 2) are evenly distributed on the high-speed motor via a bracket 3. Powder is conveyed along the copper material tubes into the spraying rotary cup 1, and then, through the high-speed rotating spraying rotary cup, the powder is evenly coated onto the inner wall of the pipe being coated.

[0051] The spraying rotary cup is made of aluminum alloy and is connected and fastened to the high-speed motor shaft through the internal thread in its mounting cavity. Thirteen rows of inclined holes are evenly distributed on the cylindrical surface of the spraying rotary cup, with 58 holes in each row. The first three rows of discharge inclined holes 5, closest to the bottom of the spraying rotary cup (closest to the rotating motor), have an inclination angle of 30 degrees, as shown in the partial right-side sectional view of the main view. The remaining ten rows of inclined holes also have an inclination angle of 30 degrees, as shown in the partial upper-side sectional view of the main view. However, the inclination directions of the two types of discharge inclined holes are opposite, ensuring that the first three rows do not discharge powder, while the last ten rows discharge powder. By switching the discharge inclined holes 5, the powder output can be adjusted, and the uniformity of powder output is ensured.

[0052] The copper feed tubes are evenly distributed on the high-speed motor via brackets. One end of the copper feed tube is directly connected to the powder feed tube, while the other end is bent inward and machined into a 45° upward spoon shape. This allows the powder to pass through the port and be thrown out at a 45° upward direction, then centrifugally ejected at a specific angle along the oblique holes on the cylindrical surface of the high-speed rotating spray cup.

[0053] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. An in-pipe powder spraying device comprising a rotary motor (4), characterized in that, The device also comprises a spraying rotary cup (1) and a feeding pipe (2), the rotary motor (4) is drivingly connected with the spraying rotary cup (1), the spraying rotary cup (1) is provided with a cavity (11) therein, and the outlet of the feeding pipe (2) is located in the cavity (11); The spraying rotary cup (1) is provided with a plurality of groups of discharge inclined openings (5) which are distributed in the circumferential direction of the columnar surface, at least one group of the discharge inclined openings (5) is inclined to a first direction, at least one group of the discharge inclined openings (5) is inclined to a second direction opposite to the first direction, and the number of the discharge inclined openings (5) inclined to the first direction is less than that of the discharge inclined openings (5) inclined to the second direction.

2. An in-line powder spray device according to claim 1, wherein, The number of the feeding pipes (2) is multiple, each feeding pipe (2) is uniformly distributed in a circle of the rotary motor (4), a support (3) is detachably installed on the rotary motor (4), the support (3) is provided with a mounting hole, and the feeding pipe (2) passes through the mounting hole.

3. An in-line powder spray device according to claim 2, wherein, The outlet end of the feeding pipe (2) is spoon-shaped, the outlet end of the feeding pipe (2) is inclined to the rotation axis of the spraying rotary cup (1), and the included angle between the upper end surface of the spoon-shaped outlet of the feeding pipe (2) and the rotation axis of the spraying rotary cup (1) ranges from 40 to 50 degrees.

4. An in-line powder spray device according to claim 1, wherein, Each group of the discharge inclined openings (5) is coaxially arranged with the spraying rotary cup (1), and each group of the discharge inclined openings (5) is parallel to each other, and the discharge inclined openings (5) of adjacent two groups are distributed in a staggered manner.

5. An in-line powder spray device according to claim 1, wherein, The number ratio of the discharge inclined openings (5) inclined to the first direction to the discharge inclined openings (5) inclined to the second direction ranges from 1-3 to 1-4.

6. An in-line powder spray device according to claim 1, wherein, Each group of the discharge inclined openings (5) inclined to the first direction is distributed adjacent to each other at one end of the spraying rotary cup (1) close to the rotary motor (4), and each discharge inclined opening (5) inclined to the second direction is distributed adjacent to each other at one end of the spraying rotary cup (1) away from the rotary motor (4).

7. An in-line powder spray device according to claim 1 wherein, The included angle between the extension axis of the discharge inclined opening (5) inclined to the first direction and the tangent of the contact point position of the columnar surface of the spraying rotary cup (1) ranges from 20 to 40 degrees.

8. An in-line powder spray device according to claim 1, wherein, The cavity (11) of the spraying rotary cup (1) is provided with a mounting column, the mounting column is coaxially arranged with the spraying rotary cup (1), and the output shaft of the rotary motor (4) is connected with the mounting column.

9. An in-line powder spray device according to claim 8, wherein, One end of the mounting column close to the rotary motor (4) is provided with a mounting cavity, the mounting cavity is provided with an internal thread, and the output shaft of the rotary motor (4) is threadedly connected with the mounting cavity.

10. An in-line powder spray device according to claim 1, wherein, The rotary motor (4) is a high-speed motor, and the rotating speed of the rotary motor (4) is greater than 10000r / min.

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