High-efficiency steel pipe inner and outer wall powder spraying mechanism

Abstract

The utility model discloses a high-efficiency steel pipe inner wall and outer wall powder spraying mechanism which comprises a storage cylinder and a powder spraying machine body, the powder spraying machine body is fixedly arranged on the bottom side of the storage cylinder, a powder spraying assembly is arranged on the storage cylinder, the powder spraying assembly comprises an air pump, and the air pump is fixedly arranged in the center of the top end of the storage cylinder. When the powder spraying device for the inner wall and the outer wall of the steel pipe is used, powder coating is driven into air near the inner wall and the outer wall of the steel pipe through airflow flowing from bottom to top in the storage barrel, and then the powder coating makes full contact with the inner wall and the outer wall of the steel pipe and is evenly adsorbed to the inner wall and the outer wall of the steel pipe under the action of electric field force; the position or angle of the steel pipe does not need to be adjusted, the device is high in automation degree and easy to operate, and the powder spraying efficiency of the inner and outer pipe walls of the steel pipe is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of steel pipe powder spraying mechanism, and in particular to a high-efficiency steel pipe inner and outer wall powder spraying mechanism. Background Technology

[0002] Powder coating of steel pipes is a surface treatment technology widely used in metal processing and manufacturing, especially for anti-corrosion, rust prevention and aesthetic treatment of steel pipes. This technology uses electrostatic spraying to evenly cover the surface of the steel pipe with powder coating, and then bakes and cures it to form a hard and durable coating.

[0003] Existing steel pipe powder spraying devices typically perform powder spraying operations on the inner and outer walls of the steel pipe by adjusting the angle or position of the steel pipe or the angle or position of the powder spraying head. This operation is complicated and reduces the powder spraying efficiency of the inner and outer walls of the steel pipe. Utility Model Content

[0004] The purpose of this invention is to provide a high-efficiency powder spraying mechanism for the inner and outer walls of steel pipes, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-efficiency steel pipe inner and outer wall powder spraying mechanism, comprising a storage cylinder and a powder spraying machine body, wherein the powder spraying machine body is fixedly installed on the bottom side of the storage cylinder, the storage cylinder is provided with a powder spraying assembly, the powder spraying assembly includes an air pump, the air pump is fixedly installed at the center position of the top of the storage cylinder, and the air inlet end of the air pump is fixedly penetrated through the cylinder wall of the storage cylinder, and a powder spraying head is fixedly installed in a circumferential array on the inner bottom wall of the storage cylinder, the feed end of the powder spraying head is connected to the corresponding discharge end of the powder spraying machine body, two push plates are arranged opposite each other inside the storage cylinder, and the outer peripheral wall of each push plate is in contact with the inner wall of the storage cylinder, a plurality of circular holes are opened in a circumferential array on the push plate, and a plurality of sets of through holes are opened on the push plate, and each set of through holes is arranged in a circumferential array on the outer peripheral side of the corresponding circular hole;

[0006] A storage mechanism is fixedly installed on the outer peripheral wall of the storage cylinder, and a limiting mechanism is provided on the outer peripheral side of the push plate.

[0007] Preferably, a square rod is slidably installed through the center of the two push plates, and the bottom end of the square rod is fixedly connected to the inner bottom wall of the storage cylinder.

[0008] Preferably, a magnetic ring is fixedly installed at the position of the corresponding circular hole on the opposite surface of the two push plates, and the shape of the cross-section of the inner hole of the magnetic ring is the same as the shape of the cross-section of the corresponding circular hole.

[0009] Preferably, a plurality of pressure limiting valves are fixedly installed through the outer peripheral wall at the bottom of the storage cylinder, and the plurality of pressure limiting valves are arranged in a circumferential array on the outer peripheral side of a plurality of powder spraying heads.

[0010] Preferably, the limiting mechanism includes a push rod, and the outer peripheral wall of the push plate has a plurality of positioning grooves arranged in a circumferential array, each being a quarter-sphere. The inner wall of the storage cylinder has a plurality of storage grooves arranged in a circumferential array at the positions corresponding to the positioning grooves. The push rod is slidably mounted in the corresponding storage groove. One end of the push rod is rotatably equipped with a ball bearing, and the end of the ball bearing close to the corresponding positioning groove is inserted into the corresponding positioning groove and contacts the inner wall of the corresponding positioning groove. A spring is provided between the push rod and the inner wall of the corresponding storage groove, and the two ends of the spring are fixedly connected to the corresponding push rod and the inner wall of the corresponding storage groove, respectively.

[0011] Preferably, a storage cylinder is fixedly installed at the middle position of the outer peripheral wall of the storage cylinder by bolts, a filter plate is fixedly installed through the top of the storage cylinder, a guide tube is fixedly installed through the center of the filter plate, and the inlet end of the guide tube is connected to the exhaust end of the air pump through a flexible tube, and the bottom end of the guide tube is fitted with the cylinder cover of the storage cylinder with a clearance.

[0012] This utility model has at least the following beneficial effects:

[0013] 1. When using the modified steel pipe inner and outer wall powder coating device, the airflow from bottom to top in the storage cylinder carries the powder coating to the air near the inner and outer pipe walls, thereby making full contact between the powder coating and the inner and outer pipe walls. Under the action of electric field force, the powder coating is evenly adsorbed onto the inner and outer pipe walls, thus completing the electrostatic spraying operation of the inner and outer pipe walls simultaneously. There is no need to adjust the position or angle of the steel pipe. The device has a high degree of automation, is simple to operate, and improves the powder coating efficiency of the inner and outer pipe walls.

[0014] 2. As mentioned above, due to the airflow, excess powder coating is directly carried into the storage mechanism for storage, so as to facilitate the collection and reuse of powder coating. After the powder spraying operation of the steel pipe is completed, powder coating will not float in the air inside the storage cylinder, so as to avoid unnecessary loss of powder coating. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments 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 based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall design of this utility model;

[0017] Figure 2 This utility model Figure 1 Schematic diagram of the overall structure on the reverse side;

[0018] Figure 3 This is a schematic diagram of the internal structure of the storage cylinder of this utility model;

[0019] Figure 4 This is a front view of the internal structure of the storage cylinder of this utility model;

[0020] Figure 5 This utility model Figure 4 Enlarged view of the structure at point A in the middle;

[0021] Figure 6 This is a schematic diagram of the internal structure of the push plate of this utility model;

[0022] Figure 7 This is a schematic diagram of the internal structure of the storage cylinder of this utility model.

[0023] In the diagram: 1. Storage cylinder; 2. Powder spraying machine body; 3. Powder spraying assembly; 31. Air pump; 32. Powder spraying head; 33. Push plate; 34. Round hole; 35. Through hole; 36. Square rod; 37. Magnetic ring; 38. Pressure relief valve; 4. Limiting mechanism; 41. Positioning groove; 42. Storage tank; 43. Push rod; 44. Ball bearing; 45. Spring; 5. Material storage mechanism; 51. Material storage cylinder; 52. Filter plate; 53. Guide tube; 54. Flexible tube. Detailed Implementation

[0024] To make the technical solution and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0025] This utility model provides a technical solution: (Refer to...) Figure 1 - Figure 7 This utility model discloses a high-efficiency steel pipe inner and outer wall powder spraying mechanism, including a storage cylinder 1 and a powder spraying machine body 2. The powder spraying machine body 2 is fixedly installed on the bottom side of the storage cylinder 1. The storage cylinder 1 is provided with a powder spraying component 3, which includes an air pump 31. The air pump 31 is fixedly installed at the center of the top of the storage cylinder 1, and the air inlet end of the air pump 31 is fixedly installed through the cylinder wall of the storage cylinder 1. The inner bottom wall of the storage cylinder 1 is fixedly installed with powder spraying heads 32 in a circumferential array. The feed end of the powder spraying head 32 is connected to the corresponding discharge end of the powder spraying machine body 2. Two push plates 33 are provided opposite to each other inside the storage cylinder 1, and the outer peripheral wall of each push plate 33 is in contact with the inner wall of the storage cylinder 1. Several circular holes 34 are opened in a circumferential array on the push plate 33, and several sets of through holes 35 are opened on the push plate 33, and each set of through holes 35 is arranged in a circumferential array on the outer peripheral side of the corresponding circular hole 34.

[0026] A storage mechanism 5 is fixedly installed on the outer peripheral wall of the storage cylinder 1, and a limiting mechanism 4 is provided on the outer peripheral side of the push plate 33.

[0027] In this embodiment, when the modified steel pipe inner and outer wall powder spraying device is used, the operator first opens the cylinder door of the storage cylinder 1, and then the operator manually pushes the push plate 33 to adapt the spacing between the push plates 33 according to the length of the steel pipe being processed. At the same time, the limiting mechanism 4 automatically completes the constraint positioning of the push plate 33 after the adjustment is completed. Then the operator places the steel pipe in sequence at the position of the corresponding round hole 34 on the bottom push plate 33. Then the operator pushes the upper push plate 33, and the position of the steel pipe is locked by the clamping and limiting of the two push plates 33.

[0028] After the steel pipe is installed, the operator closes the door of the storage cylinder 1 and then starts the air pump 31 to make the gas in the storage cylinder 1 flow from bottom to top. At the same time, the powder spraying machine body 2 sprays the powder coating into the bottom of the storage cylinder 1 through the powder spraying head 32. Then, due to the airflow, part of the powder coating flows upward through the through hole 35, and another part of the powder coating flows upward through the round hole 34 and the steel pipe. This causes a large amount of powder coating to float in the air near the inner and outer walls of the steel pipe. Under the action of the electric field force, the powder coating is evenly adsorbed onto the inner and outer walls of the steel pipe.

[0029] In a further preferred embodiment of this utility model, such as Figure 3 As shown, a square rod 36 is slidably installed through the center of the two push plates 33, and the bottom end of the square rod 36 is fixedly connected to the inner bottom wall of the storage cylinder 1.

[0030] In this embodiment, when the operator pushes the push plate 33, due to the constraint and guidance of the square rod 36, the push plate 33 moves up and down in a linear trajectory within the storage cylinder 1.

[0031] In a further preferred embodiment of this utility model, such as Figure 6 As shown, a magnetic ring 37 is fixedly installed on the opposite surface of the two push plates 33 at the position corresponding to the circular hole 34, and the shape of the cross-section of the inner hole of the magnetic ring 37 is the same as the shape of the cross-section of the corresponding circular hole 34.

[0032] In this embodiment, when the operator places the steel pipe on the bottom push plate 33, the steel pipe can be placed directly on the magnetic ring 37. Due to the attraction of the magnetic ring 37 to the steel pipe and the support of the magnetic ring 37 to the steel pipe, the placement of the steel pipe on the push plate 33 is more stable.

[0033] In a further preferred embodiment of this utility model, such as Figure 2 and Figure 3 As shown, a number of pressure relief valves 38 are fixedly installed through the outer peripheral wall of the bottom of the storage cylinder 1, and the number of pressure relief valves 38 are arranged in a circular array on the outer peripheral side of a number of powder spraying heads 32.

[0034] In this embodiment, when the air pump 31 extracts the gas from the top of the storage cylinder 1, it can continuously form a negative pressure chamber at the top of the storage cylinder 1, thereby causing the gas at the bottom of the storage cylinder 1 to flow upward, and causing a negative pressure chamber to be formed at the bottom of the storage cylinder 1 simultaneously. At this time, a pressure difference is generated at both ends of the pressure limiting valve 38, and some external gas continuously flows through the pressure limiting valve 38 into the bottom of the storage cylinder 1 to replenish the gas lost at the bottom of the storage cylinder 1. Finally, a continuous airflow from bottom to top is formed in the storage cylinder 1. The long gas flow time allows the excess powder coating to be carried into the storage mechanism 5 by the airflow after the steel pipe powder spraying operation is completed, so as to facilitate the collection and reuse of the powder coating.

[0035] In a further preferred embodiment of this utility model, such as Figure 4 and Figure 5 As shown, the limiting mechanism 4 includes a push rod 43. The outer peripheral wall of the push plate 33 is provided with a number of positioning grooves 41 arranged in a circular array. The inner wall of the storage cylinder 1 is provided with a number of storage grooves 42 arranged in a circular array at the positions corresponding to the positioning grooves 41. The push rod 43 is slidably installed in the corresponding storage groove 42. One end of the push rod 43 is rotatably equipped with a ball 44, and the end of the ball 44 close to the corresponding positioning groove 41 is inserted into the corresponding positioning groove 41 and contacts the inner wall of the corresponding positioning groove 41. A spring 45 is provided between the push rod 43 and the inner wall of the corresponding storage groove 42, and the two ends of the spring 45 are fixedly connected to the corresponding push rod 43 and the inner wall of the corresponding storage groove 42, respectively.

[0036] In this embodiment, when the operator pushes the push plate 33, the ball 44 is squeezed out of the positioning groove 41 along the outer arc wall of the ball 44 due to the mutual contact between the ball 44 and the inner wall of the positioning groove 41. This automatically releases the constraint and limiting state of the push plate 33. As the push plate 33 moves, when the positioning groove 41 is aligned with the ball 44 again, the ball 44 is automatically inserted into the positioning groove 41 due to the push of the spring 45 on the push rod 43. Through the mutual contact between the ball 44 and the inner wall of the positioning groove 41, the constraint and positioning of the push plate 33 is automatically re-completed. After the position of the push plate 33 is adjusted, the ball 44 is tightly fitted to the inner wall of the opening of the storage tank 42 due to the push of the spring 45 on the push rod 43, automatically sealing the opening of the storage tank 42 to prevent powder from entering the storage tank 42 and causing unnecessary loss of raw materials. The device has a high degree of automation and reduces the workload of the operator.

[0037] In a further preferred embodiment of this utility model, such as Figure 1 , Figure 2 and Figure 7As shown, a storage cylinder 51 is fixedly installed at the middle position of the outer peripheral wall of the storage cylinder 1 by bolts. A filter plate 52 is fixedly installed through the top of the storage cylinder 51. A guide tube 53 is fixedly installed through the center of the filter plate 52. The feed end of the guide tube 53 is connected to the exhaust end of the air pump 31 through a flexible tube 54. The bottom end of the guide tube 53 is fitted with the cylinder cover of the storage cylinder 51 with a clearance.

[0038] In this embodiment, the gas drawn by the air pump 31 is injected into the conduit 53 through the flexible tube 54, and then guided into the bottom of the storage cylinder 51 by the conduit 53. Since the internal space of the storage cylinder 51 is large, the airflow rate decreases rapidly. Finally, the gas passes through the holes of the filter plate 52 and is discharged outside the storage cylinder 51. The powder in the airflow is intercepted by the filter plate 52 and stored in the storage cylinder 51, which facilitates the collection and reuse of the powder coating.

[0039] Working principle: When using this modified powder spraying device for the inner and outer walls of steel pipes, the operator first opens the door of the storage cylinder 1, and then manually pushes the push plate 33. Due to the mutual abutment between the ball bearings 44 and the inner wall of the positioning groove 41, the ball bearings 44 can be squeezed out of the positioning groove 41 along the outer arc wall of the ball bearings 44, thereby automatically releasing the constraint and limiting state of the push plate 33. The spacing between the push plates 33 can be adaptively adjusted according to the length of the steel pipe being processed.

[0040] It should be noted that during the above-mentioned adjustment of the position of the push plate 33, as the push plate 33 moves and the positioning groove 41 is re-aligned with the ball 44, the ball 44 automatically inserts into the positioning groove 41 due to the push of the spring 45 on the push rod 43. Through the mutual contact between the ball 44 and the inner wall of the positioning groove 41, the constraint positioning of the push plate 33 is automatically re-completed. After the position adjustment of the push plate 33 is completed, the ball 44 fits tightly against the inner wall of the opening of the storage tank 42 due to the push of the spring 45 on the push rod 43, automatically completing the sealing of the opening of the storage tank 42, so as to prevent powder from entering the storage tank 42 and causing unnecessary loss of raw materials.

[0041] After the position of the push plate 33 is adjusted, the operator places the steel pipe on the magnetic ring 37 of the bottom push plate 33. Due to the attraction between the magnetic ring 37 and the steel pipe or the support of the magnetic ring 37 on the steel pipe, the steel pipe is placed relatively stably on the bottom push plate 33. Then the operator pushes the upper push plate 33 so that the upper magnetic ring 37 is in close contact with the top of the steel pipe. At this time, due to the clamping and limiting of the steel pipe by the two push plates 33, the position of the steel pipe in the storage cylinder 1 remains stable. Finally, the cylinder door of the storage cylinder 1 is closed and the installation of the steel pipe is completed.

[0042] After the steel pipe is installed, the air pump 31 starts to continuously draw gas from the top of the storage cylinder 1, so that a negative pressure chamber is continuously formed at the top of the storage cylinder 1. This causes the gas at the bottom of the storage cylinder 1 to flow upward, and a negative pressure chamber is also formed at the bottom of the storage cylinder 1. At this time, a pressure difference is generated at both ends of the pressure limiting valve 38. Some of the external gas continuously flows through the pressure limiting valve 38 into the bottom of the storage cylinder 1 to replenish the gas lost at the bottom of the storage cylinder 1. Finally, an airflow from bottom to top is continuously formed in the storage cylinder 1.

[0043] After the airflow from bottom to top is formed in the storage cylinder 1, the powder spraying machine body 2 is started and the powder is sprayed into the bottom of the storage cylinder 1 through the powder spraying head 32. Then, due to the airflow, part of the powder coating flows upward through the through hole 35, and another part of the powder coating flows upward through the round hole 34 and the steel pipe. This causes a large amount of powder coating to float in the air near the inner and outer walls of the steel pipe. Under the action of the electric field force, the powder coating is evenly adsorbed onto the inner and outer walls of the steel pipe, while the excess powder coating is guided into the guide tube 53 through the soft tube 54 with the airflow, and then injected into the bottom of the storage cylinder 51. Because the internal space of the storage cylinder 51 is large, the airflow rate decreases rapidly. Finally, the gas is discharged outside the storage cylinder 51 through the holes of the filter plate 52, while the powder in the airflow is intercepted and stored in the storage cylinder 51 by the filter plate 52.

[0044] After the electrostatic spraying of the inner and outer walls of the steel pipe is completed, the powder spraying machine stops running. The gas flowing in the storage cylinder 1 can gradually carry the remaining powder coating in the storage cylinder 1 into the storage cylinder 51 for storage. After the powder coating stored in the storage cylinder 51 reaches a certain amount, the operator unscrews the bolts on the storage cylinder 51 and removes the guide tube 53 and the flexible tube 54 by rotating the flexible tube 54. The storage cylinder 51 can be directly removed from the storage cylinder 1. Then the operator unscrews the cap inside the opening of the storage cylinder 51 and can directly pour the powder coating in the storage cylinder 1 into a specific location for reuse by moving the storage cylinder 1.

[0045] 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 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. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency steel pipe inner and outer wall powder spraying mechanism, comprising a storage cylinder (1) and a powder spraying machine body (2), characterized in that: The powder spraying machine body (2) is fixedly installed on the bottom side of the storage cylinder (1). The storage cylinder (1) is provided with a powder spraying assembly (3). The powder spraying assembly (3) includes an air pump (31). The air pump (31) is fixedly installed at the center of the top of the storage cylinder (1), and the air inlet of the air pump (31) is fixedly installed through the cylinder wall of the storage cylinder (1). Powder spraying heads (32) are fixedly installed in a circumferential array on the inner bottom wall of the storage cylinder (1). The feed end of 32) is connected to the corresponding discharge end of the powder spraying machine body (2). Two push plates (33) are provided in the storage cylinder (1) and the outer peripheral wall of each push plate (33) is in contact with the inner wall of the storage cylinder (1). Several round holes (34) are arranged in a circular array on the push plate (33). Several sets of through holes (35) are arranged in a circular array on the push plate (33) and each set of through holes (35) is arranged in a circular array on the outer peripheral side of the corresponding round hole (34). A storage mechanism (5) is fixedly installed on the outer peripheral wall of the storage cylinder (1), and a limiting mechanism (4) is provided on the outer peripheral side of the push plate (33).

2. The high-efficiency steel pipe inner and outer wall powder spraying mechanism according to claim 1, characterized in that: A square rod (36) is slidably installed through the center of the two push plates (33), and the bottom end of the square rod (36) is fixedly connected to the inner bottom wall of the storage cylinder (1).

3. The high-efficiency steel pipe inner and outer wall powder spraying mechanism according to claim 2, characterized in that: A magnetic ring (37) is fixedly installed on the opposite surfaces of the two push plates (33) at the position corresponding to the circular hole (34), and the shape of the cross-section of the inner hole of the magnetic ring (37) is the same as the shape of the cross-section of the corresponding circular hole (34).

4. The high-efficiency steel pipe inner and outer wall powder spraying mechanism according to claim 3, characterized in that: Several pressure relief valves (38) are fixedly installed on the outer peripheral wall of the bottom of the storage cylinder (1), and the pressure relief valves (38) are arranged in a circular array on the outer peripheral side of several powder spraying heads (32).

5. The high-efficiency steel pipe inner and outer wall powder spraying mechanism according to claim 4, characterized in that: The limiting mechanism (4) includes a push rod (43). The outer peripheral wall of the push plate (33) is provided with a plurality of positioning grooves (41) arranged in a circumferential array. The inner wall of the storage cylinder (1) is provided with a plurality of storage grooves (42) arranged in a circumferential array at the positions corresponding to the positioning grooves (41). The push rod (43) is slidably installed in the corresponding storage groove (42). One end of the push rod (43) is rotatably equipped with a ball (44), and the end of the ball (44) close to the corresponding positioning groove (41) is inserted into the corresponding positioning groove (41) and contacts the inner wall of the corresponding positioning groove (41). A spring (45) is provided between the push rod (43) and the inner wall of the corresponding storage groove (42), and the two ends of the spring (45) are fixedly connected to the corresponding push rod (43) and the inner wall of the corresponding storage groove (42) respectively.

6. The high-efficiency steel pipe inner and outer wall powder spraying mechanism according to claim 5, characterized in that: A storage cylinder (51) is fixedly installed at the middle position of the outer peripheral wall of the storage cylinder (1) by bolts. A filter plate (52) is fixedly installed through the top of the storage cylinder (51). A guide tube (53) is fixedly installed through the center of the filter plate (52). The feed end of the guide tube (53) is connected to the exhaust end of the air pump (31) through a soft tube (54). The bottom end of the guide tube (53) is fitted with the cylinder cover of the storage cylinder (51) with a clearance.

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