Powder feeding mechanism for meltallizing

Abstract

The utility model discloses a powder feeding mechanism used for meltallizing, which comprises a plasma generator used for generating plasma flame flow and a powder feeding pipeline used for spraying yttrium oxide powder to a nozzle of the plasma generator, and the powder feeding pipeline comprises a powder feeding needle tube, an adjusting tube and a powder feeding hose which are connected in sequence. The front end of the powder feeding needle tube extends to one side of a nozzle of the plasma generator, and the adjusting tube can move back and forth and is used for adjusting the distance between the powder feeding needle tube and the nozzle of the plasma generator, and can rotate and is used for adjusting the angle between the powder feeding needle tube and the nozzle of the plasma generator. On the basis that the main body structure of the powder feeding pipeline is not changed, the distance and the angle of the powder feeding needle tube relative to the nozzle of the plasma generator can be adjusted by utilizing a simpler structure, so that the coating quality and the service life of a workpiece are ensured.

Description

Technical Field

[0001] This utility model relates to the field of melting and spraying device technology, specifically a powder feeding mechanism for melting and spraying. Background Technology

[0002] In the field of LCD screens, spraying is a common surface treatment process. The spraying equipment mainly includes a plasma generator and a powder feeding needle. The plasma generator generates a plasma flame, and the powder feeding needle, using argon gas as the delivery medium, sprays yttrium oxide powder into the high-temperature plasma flame. The yttrium oxide powder is heated to a molten or semi-molten state, sprayed and deposited onto the surface of the workpiece, forming a sprayed deposition layer on the surface of the workpiece.

[0003] Therefore, in order to ensure product quality during actual operation, it is necessary to maintain a reasonable distance and angle between the powder feeding needle tube and the plasma generator. This requires adjusting the distance and angle between the powder feeding needle tube and the plasma generator according to the process requirements. Utility Model Content

[0004] The purpose of this invention is to overcome the defects and deficiencies of the existing technology and provide a powder feeding mechanism for plasma spraying. Without changing the main structure of the powder feeding pipeline, the distance and angle between the powder feeding needle and the nozzle of the plasma generator can be adjusted using a relatively simple structure to ensure the coating quality and service life of the workpiece.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A powder feeding mechanism for plasma spraying includes a plasma generator for generating a plasma flame and a powder feeding pipeline for spraying yttrium oxide powder into the nozzle of the plasma generator. The powder feeding pipeline comprises a powder feeding needle tube, an adjusting tube, and a powder feeding hose connected in sequence. The front end of the powder feeding needle tube extends to one side of the nozzle. The adjusting tube is movable back and forth to adjust the distance between the powder feeding needle tube and the nozzle, and is also rotatable to adjust the angle between the powder feeding needle tube and the nozzle.

[0007] Furthermore, a bracket is provided on one side of the adjusting tube, and a horizontal shaft is rotatably connected to one side of the bracket. A fixed tube is fixedly connected to the front end of the horizontal shaft, and the adjusting tube is slidably fitted into the fixed tube.

[0008] Furthermore, the upper wall of the fixed tube is provided with a strip-shaped through groove extending along its length, and a lever is fixedly connected to the outer wall of the adjusting tube. The lever passes upward through the strip-shaped through groove and extends outward. The bottom of the lever is provided with a threaded section and a locking nut is screwed in.

[0009] Furthermore, the outer wall of the fixed tube is provided with displacement scales distributed along its length to indicate the displacement of the lever as it moves back and forth along the strip groove.

[0010] Furthermore, a driven gear is fixedly fitted on the outer wall of the horizontal shaft, and a driving gear that meshes with the driven gear is rotatably mounted on the bracket. A manual turntable is coaxially mounted on the driving gear.

[0011] Furthermore, a locking element is rotatably mounted on the bracket, the locking element having a pointed end that is inserted into a tooth groove of the drive gear.

[0012] Furthermore, the bracket is provided with an angle scale around the driven gear in the circumference, which is used to indicate the rotational angle of the driven gear.

[0013] Furthermore, both the powder feeding needle tube and the adjusting tube are stainless steel tubes, and a ceramic tube segment is embedded at the front end of the powder feeding needle tube. The inner diameter of the ceramic tube segment is equal to the inner diameter of the powder feeding needle tube behind it.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention divides the powder delivery pipeline into a powder delivery needle tube, an adjusting tube, and a powder delivery hose connected in sequence. On the one hand, the adjusting tube can be moved back and forth to adjust the distance between the powder delivery needle tube and the nozzle of the plasma generator. On the other hand, the adjusting tube can be rotated to adjust the angle between the powder delivery needle tube and the nozzle of the plasma generator. That is, without changing the main structure of the powder delivery pipeline, the distance and angle between the powder delivery needle tube and the nozzle of the plasma generator can be adjusted using a relatively simple structure, thereby ensuring the coating quality and service life of the workpiece. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 for Figure 1 Enlarged structural diagram of part A.

[0018] Figure 3 for Figure 1 Enlarged structural diagram of section B. Detailed Implementation

[0019] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] See Figure 1-3 A powder feeding mechanism for plasma spraying includes a plasma generator for generating a plasma flame and a powder feeding pipeline for spraying yttrium oxide powder into a nozzle 1 of the plasma generator. The powder feeding pipeline includes a powder feeding needle tube 2, an adjusting tube 3, and a powder feeding hose 4 connected in sequence. The front end of the powder feeding needle tube 2 extends to one side of the nozzle 1. The adjusting tube can move back and forth to adjust the distance between the powder feeding needle tube 2 and the nozzle 1, and can also rotate to adjust the angle between the powder feeding needle tube 2 and the nozzle 1. The powder feeding hose 4 leads to a powder hopper containing yttrium oxide powder.

[0021] In this utility model, a bracket 5 is provided on one side of the adjusting tube 3, a horizontal shaft 6 is rotatably connected to one side of the bracket 5, a fixed tube 7 is fixedly connected to the front end of the horizontal shaft 6, and the adjusting tube 3 is slidably fitted into the fixed tube 7.

[0022] It should be noted that the lower end of the bracket 5 can be fixed to one side of the melt spraying worktable.

[0023] In this utility model, the upper wall of the fixed tube 7 is provided with a strip-shaped through groove 8 extending along its length direction, and the outer wall of the adjusting tube 3 is fixedly connected with a lever 9. The lever 9 passes through the strip-shaped through groove 8 upward and extends outward. The bottom of the lever 9 is provided with a threaded section and a locking nut 10 is screwed on.

[0024] Therefore, by loosening the locking nut 10, the adjusting tube 3 can be moved back and forth by moving the lever 9, thereby adjusting the distance between the powder feeding needle tube 2 and the nozzle 1; by tightening the locking nut 10 so that it abuts against the outer wall of the fixed tube 7, the lever 9 is locked, thereby fixing the adjusting tube 3 and the powder feeding needle tube 2 in the adjusted position.

[0025] In this utility model, the outer wall of the fixed tube 7 is provided with displacement scales 11 distributed along its length direction, which are used to indicate the displacement of the lever 9 moving back and forth along the strip groove 8, thereby intuitively reflecting the actual displacement of the regulating tube 3, i.e. the powder feeding needle tube 2, when it moves back and forth.

[0026] In this utility model, a driven gear 12 is fixedly mounted on the outer wall of the horizontal shaft 6, and a driving gear 13 that meshes with the driven gear 12 is rotatably mounted on the bracket 5. A manual rotating wheel 14 is coaxially mounted on the driving gear 13.

[0027] Therefore, by rotating the manual rotary wheel 14, the horizontal shaft 6 is driven to rotate through the driving gear 13 and the driven gear 12, which in turn drives the fixed tube 7, the adjusting tube 3 and the powder feeding needle tube 2 to rotate, thereby adjusting the angle of the powder feeding needle tube 2 relative to the nozzle 1.

[0028] In this utility model, a locking member 15 is rotatably mounted on the bracket 5. The locking member 15 has a pointed part 16, which is inserted into a tooth groove of the drive gear 13.

[0029] Therefore, by rotating the locking member 15 upwards, the tip 16 is disengaged from the corresponding tooth groove, thus unlocking the mechanism, and the manual rotating wheel 14 can be rotated to adjust the angle.

[0030] By rotating the locking member 15 downwards, the tip 16 is inserted into a tooth groove of the driving gear 13, thereby locking the driving gear 13 and the driven gear 12, and thus fixing the adjusting tube 3 and the powder feeding needle tube 2 at the adjusted angle.

[0031] In this utility model, the bracket 5 is provided with an angle scale 17 around the driven gear to indicate the rotation angle of the driven gear 12, thereby intuitively reflecting the actual angle of the driven gear 12, i.e. the powder feeding needle tube 2, when it rotates.

[0032] In this utility model, both the powder feeding needle tube 2 and the regulating tube 3 are stainless steel tubes, and the front end of the powder feeding needle tube 2 is fitted with a ceramic tube section 18.

[0033] Therefore, compared with stainless steel tubes, ceramic tube section 18 has stronger high temperature resistance and is not easily deformed, which can effectively improve the overall service life of powder delivery needle tube 2 and help save costs.

[0034] In addition, the inner diameter of the ceramic tube section 18 is equal to the inner diameter of the powder feeding needle tube 2 behind it, so as not to hinder the normal spraying of yttrium oxide powder.

[0035] The present invention will be further described below with reference to the accompanying drawings:

[0036] Before the melting process, according to the melting process requirements of different workpieces, on the one hand, the locking nut 10 is loosened and the lever 9 is moved back and forth to realize the back and forth movement of the adjusting tube 3, thereby adjusting the distance between the powder feeding needle tube 2 and the nozzle 1.

[0037] After adjusting the distance, tighten the locking nut 10 so that it abuts against the outer wall of the fixed tube 7 to lock the lever 9, thus fixing the adjusting tube 3 and the powder feeding needle tube 2 in the adjusted position.

[0038] On the other hand, rotating the locking member 15 upwards causes the tip 16 to disengage from the corresponding tooth groove, thereby unlocking the device. Then, rotating the manual rotary wheel 14 drives the horizontal shaft 6 to rotate via the drive gear 13 and the driven gear 12, which in turn drives the fixed tube 7, the adjusting tube 3, and the powder feeding needle tube 2 to rotate, thereby adjusting the angle of the powder feeding needle tube 2 relative to the nozzle 1.

[0039] After adjusting the angle, rotate the locking member 15 downwards so that the tip 16 is inserted into a tooth groove of the drive gear 13, thereby locking the drive gear 13 and the driven gear 12, thus fixing the adjusting tube 3 and the powder feeding needle tube 2 at the adjusted angle.

[0040] During the spraying process, the plasma generator sprays a high-temperature plasma flame downward through nozzle 1. The powder feeding pipeline uses argon gas as the transport medium and sprays yttrium oxide powder into the high-temperature plasma flame through the powder feeding needle tube 2. The yttrium oxide powder is heated to a molten or semi-molten state and sprayed and deposited onto the surface of the workpiece to form a sprayed deposition layer on the surface of the workpiece.

[0041] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0042] Therefore, the above description is only a preferred embodiment of this application and is not intended to limit the scope of this application; that is, all equivalent modifications made in accordance with the scope of the claims of this application shall be within the protection scope of the claims of this application.

Claims

1. A powder feeding mechanism for plasma spraying, comprising a plasma generator for generating a plasma flame and a powder feeding pipeline for spraying yttrium oxide powder into the nozzle of the plasma generator, characterized in that: The powder delivery pipeline includes a powder delivery needle tube, an adjusting tube, and a powder delivery hose connected in sequence. The front end of the powder delivery needle tube extends to one side of the nozzle. The adjusting tube can move back and forth to adjust the distance between the powder delivery needle tube and the nozzle, and can also rotate to adjust the angle between the powder delivery needle tube and the nozzle.

2. The powder feeding mechanism for melt spraying according to claim 1, characterized in that: A bracket is provided on one side of the adjusting tube, and a horizontal shaft is rotatably connected to one side of the bracket. A fixed tube is fixedly connected to the front end of the horizontal shaft, and the adjusting tube is slidably fitted into the fixed tube.

3. The powder feeding mechanism for melt spraying according to claim 2, characterized in that: The upper wall of the fixed tube is provided with a strip-shaped through groove extending along its length. A lever is fixedly connected to the outer wall of the adjusting tube. The lever passes through the strip-shaped through groove and extends upward. The bottom of the lever is provided with a threaded section and a locking nut is screwed in.

4. A powder feeding mechanism for melt spraying according to claim 3, characterized in that: The outer wall of the fixed tube is provided with displacement scales distributed along its length to indicate the displacement of the lever as it moves back and forth along the strip groove.

5. A powder feeding mechanism for melt spraying according to claim 2, characterized in that: A driven gear is fixedly mounted on the outer wall of the horizontal shaft, and a driving gear that meshes with the driven gear is rotatably mounted on the bracket. A manual rotating wheel is coaxially mounted on the driving gear.

6. A powder feeding mechanism for melt spraying according to claim 5, characterized in that: A locking element is rotatably mounted on the bracket. The locking element has a pointed portion that is inserted into a tooth groove of the drive gear.

7. A powder feeding mechanism for melt spraying according to claim 5, characterized in that: The bracket has an angle scale around the driven gear to indicate the rotation angle of the driven gear.

8. A powder feeding mechanism for melt spraying according to claim 1, characterized in that: Both the powder feeding needle tube and the regulating tube are stainless steel tubes. A ceramic tube segment is embedded at the front end of the powder feeding needle tube, and the inner diameter of the ceramic tube segment is equal to the inner diameter of the powder feeding needle tube behind it.

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