Engine part surface passivation device and method

Abstract

The application relates to the technical field of engine accessory machining, and particularly discloses an engine part surface passivation device which comprises a box body, an opening is arranged at one end of the box body, a conveying belt is vertically arranged at the top of the box body, a plurality of connecting shafts are uniformly and vertically connected to the conveying belt, a rotating assembly is arranged in the box body and comprises rotating gears coaxially connected with the connecting shafts and a plurality of clamping teeth, the rotating gears and the clamping teeth are mutually engaged when the connecting shafts are moved by the conveying belt, a mounting frame is fixedly connected with the rotating gears and used for placing the valve, and a spraying plate is arranged in the box body and used for spraying strong oxidants on the valve on the mounting frame. The engine part surface passivation device solves the problem that the valve needs to be manually or mechanically turned over during the spraying of the strong oxidants in the traditional valve passivation process, thereby reducing the processing efficiency of the passivation process.

Description

Technical Field

[0001] This application relates to the field of engine parts processing technology, and specifically discloses an engine parts surface passivation device and method. Background Technology

[0002] In the processing of engine parts, passivation of the parts' surfaces is an essential step. Taking engine valves as an example, after the valves are polished, cleaned, and dried, a strong oxidizing agent needs to be sprayed onto the valve surface to form a protective film, thereby improving the valve's corrosion resistance.

[0003] In the traditional valve passivation process, the valves are usually dried and then transported in batches to the passivation equipment. A strong oxidant is then evenly sprayed onto the surface of the valve. During the spraying process, the valves need to be manually or mechanically rotated to ensure that all surfaces of the valve are sprayed with the strong oxidant, thus preventing any dead corners from being sprayed.

[0004] However, existing passivation processes have the following technical problems: First, when valves are transported in batches to the passivation equipment for spraying with strong oxidants, the valves are prone to collisions, causing surface damage. Second, because the valves are sprayed in batches, the valves that have been dried first need to be temporarily stored until a certain quantity is reached before entering the passivation equipment. During this process, the valve surface is easily contaminated with dust and other impurities, affecting the subsequent passivation effect. Third, the efficiency of manually or mechanically flipping the valves during the strong oxidant spraying process is low, reducing the processing efficiency of the passivation process. Therefore, in view of these issues, the inventors have provided a surface passivation device and method for engine parts to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to solve the problem that in the traditional valve passivation process, the valve needs to be manually or mechanically flipped during the strong oxidant spraying process, which leads to a decrease in the processing efficiency of the passivation process.

[0006] To achieve the above objectives, the basic solution of the present invention provides a surface passivation device for engine parts, comprising:

[0007] The box body; one end of the box body is provided with an opening;

[0008] A conveyor belt is vertically installed at the top of the box, and several connecting shafts are uniformly and vertically rotatably connected to the conveyor belt;

[0009] The rotating assembly includes rotating gears coaxially connected to the connecting shaft and several locking teeth disposed inside the housing. When the conveyor belt drives the connecting shaft to move, the rotating gears and locking teeth mesh with each other.

[0010] The mounting bracket is fixedly connected to the rotating gear and used for valve placement;

[0011] A spray plate, located inside the housing, is used to spray a strong oxidizing agent onto the valves on the mounting bracket.

[0012] The principle and effect of this basic scheme are as follows:

[0013] 1. Compared with the prior art, the present invention uses a conveyor belt to transport the connecting shaft, thereby transporting the mounting bracket and the valves placed on the mounting bracket. This allows the valves to be placed individually in the housing for passivation after grinding, cleaning and drying. Compared with traditional batch passivation, the present invention ensures the effectiveness of the processing, avoids the problem of dust contamination on the surface of the valves due to temporary storage, and improves the process flow of the valve processing.

[0014] 2. Compared with the prior art, the present invention sets up a rotating component in the housing. When the connecting shaft is driven by the conveyor belt, the meshing between the rotating gear and the cleat causes the cleat to rotate, which in turn drives the connecting shaft to rotate. This, in turn, drives the mounting bracket and the valve placed on the mounting bracket to rotate. This achieves the effect of rotating the valve while driving it to move, thus allowing the spray plate to evenly spray all surfaces of the valve. This replaces the traditional process of manually or mechanically flipping the valve during valve passivation. It not only effectively avoids damage to the valve surface, but also improves the valve flipping efficiency and passivation efficiency.

[0015] Furthermore, it also includes a limiting ring, which is disposed inside the housing. When the conveyor belt drives the connecting shaft to move, the side of the connecting shaft away from the retaining teeth is in contact with the inner wall of the limiting ring. The limiting ring can limit the other side of the connecting shaft, preventing the position of the connecting shaft from deflecting and affecting the normal meshing between the rotating gear and the retaining teeth.

[0016] Furthermore, the cross-sections of the limiting ring and the retaining teeth are respectively adapted to the movement trajectories of the connecting shaft and the rotating gear. This arrangement allows the limiting ring and connecting shaft, and the retaining teeth and rotating gear, to be mutually adapted, thereby improving the overall structural compactness.

[0017] Furthermore, the mounting bracket includes symmetrically arranged connecting rods and a limiting rod located between the bottoms of the connecting rods, with a vertical placement hole on the limiting rod. The connecting rods, limiting rod, and placement hole fully utilize the shape and structure of the valve itself, allowing the valve to be easily placed onto or removed from the mounting bracket.

[0018] Furthermore, the upper surface of the limiting rod is provided with a limiting groove, and the mounting bracket also includes an inner ring that is vertically slidably connected to the limiting rod and can extend into the limiting groove, and an outer ring that is fixedly connected to the inner ring and sleeved outside the limiting rod. The housing is also provided with an adjustment groove that matches the outer ring. The adjustment groove is provided so that it can limit the position of the outer ring, thereby further limiting the position of the mounting bracket through the inner ring, thus preventing the position of the mounting bracket from shifting and affecting the passivation effect on the valve.

[0019] Furthermore, the adjusting groove has a smoothly transitioned undulating surface, and the height difference of the undulating surface is greater than the depth of the placement hole. By setting the undulating surface, the adjusting groove acts on the outer ring to drive the outer ring to move vertically up and down, thereby driving the valve to move vertically up and down through the inner ring. This prevents the problem of dead corners that cannot be sprayed by the spray plate due to the valve being fixed on the mounting bracket or located in the placement hole.

[0020] Furthermore, the spray coating plates are multiple and distributed at the bends of the undulating surface. This arrangement ensures that the spray coating plates can apply a strong oxidizing agent to the valves from all directions.

[0021] Furthermore, the adjusting grooves are evenly arranged along the movement trajectory of the mounting frame. The spray plate is located on one side of the housing, and several fans are located on the other side of the housing. Several air outlets are evenly arranged on the side wall of the housing near the fans. This arrangement allows the valves to be further cleaned by the fans before the strong oxidant is sprayed, preventing the valves from becoming dusty during the drying process and affecting the subsequent passivation effect.

[0022] Based on the same inventive concept, the present invention provides a valve surface passivation method, which includes using the above-mentioned valve surface passivation device to passivate the valve surface.

[0023] Furthermore, the steps for passivating the valve surface using the aforementioned valve surface passivation device are as follows:

[0024] Step S1: Place the valve to be passivated onto the mounting bracket through the opening of the housing;

[0025] In step S2, the conveyor belt drives the connecting shaft to move, thereby moving the valve on the mounting bracket. At the same time, the spraying plate sprays a strong oxidant onto the surface of the valve. During the movement, the rotating gear and the cleat mesh with each other, causing the rotating gear to rotate, which in turn drives the connecting shaft and the mounting bracket to rotate, thereby making the spraying plate evenly spray all surfaces of the valve.

[0026] Step S3: After the spraying is completed, remove the valve from the opening of the housing.

[0027] The method of this invention for passivating valves utilizes a conveyor belt to transport the connecting shaft, thereby transporting the mounting bracket and the valves placed on it. This allows the valves, after grinding, cleaning, and drying, to be placed individually in the housing for passivation. Compared to traditional batch passivation, this method ensures processing efficiency while avoiding the problem of dust contamination on the valve surface due to temporary storage. Furthermore, it replaces the traditional manual or mechanical gripper flipping process for valve passivation, effectively preventing damage to the valve surface and improving both valve flipping and passivation efficiency. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This paper shows a schematic diagram of the external structure of an engine part surface passivation device according to an embodiment of this application;

[0030] Figure 2 This paper shows a schematic diagram of the conveyor belt structure in an engine part surface passivation device according to an embodiment of this application;

[0031] Figure 3 This paper shows a schematic diagram of the internal structure of the housing in an engine part surface passivation device according to an embodiment of this application;

[0032] Figure 4 This paper shows a schematic diagram of a mounting bracket in an engine part surface passivation device according to an embodiment of this application;

[0033] Figure 5 This illustration shows a schematic diagram of one state of the mounting bracket and valve engagement in an engine part surface passivation device according to an embodiment of this application;

[0034] Figure 6 This illustration shows another state of the mounting bracket and valve engagement in an engine part surface passivation device according to an embodiment of this application. Detailed Implementation

[0035] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structure, features and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0036] The reference numerals in the accompanying drawings include: housing 1, driving gear 2, driven gear 3, protrusion 4, grooved wheel 5, conveyor belt 6, mounting base 7, connecting shaft 8, rotating gear 9, connecting rod 10, collar 11, inner ring 1101, outer ring 1102, connecting handle 1103, slider 1104, toothed plate 12, limiting ring 13, first spray plate 14, second spray plate 15, slide groove 16, placement hole 17, valve 18.

[0037] A surface passivation device for engine parts, implementing, for example Figure 1 As shown, it includes the following structure:

[0038] Box 1: The right end of box 1 is provided with an opening to facilitate the placement or removal of valve 18 into or from box 1. A liquid collection tank is provided at the bottom of box 1 and connected to a recovery pipe.

[0039] Conveyor belt 6: such as Figure 2 As shown, the conveyor belt 6 is vertically positioned at the top of the housing 1 and is driven by a drive mechanism located at the top of the housing 1. The drive mechanism includes a drive motor, a drive gear 2 coaxially connected to the output shaft of the drive motor, a driven gear 3 meshing with the drive gear 2, a protrusion 4 on the driven gear 3, and a grooved wheel 5 rotatably connected to the housing 1. The grooved wheel 5 has multiple radial grooves that mate with the protrusion 4. The grooved wheel 5 is coaxially connected to one of the pulleys of the conveyor belt 6, thereby driving the conveyor belt 6 to move intermittently, providing time conditions for the valve 18 to be placed into or removed from the housing 1. Several mounting seats 7 are uniformly provided on the surface of the conveyor belt 6, and each mounting seat 7 is rotatably connected to a vertical connecting shaft 8.

[0040] Rotating components: such as Figure 3 As shown, the rotating assembly includes a rotating gear 9 coaxially connected to the connecting shaft 8 and several locking teeth disposed within the housing 1. Correspondingly, a locking tooth plate 12 is fixedly installed within the housing 1 by a vertical channel steel. Several locking teeth are evenly distributed at the edge of the locking tooth plate 12. Correspondingly, the cross-section of the locking tooth plate 12 is adapted to the movement trajectory of the rotating gear 9. Since the conveyor belt 6 itself has a certain elasticity, the connecting shaft 8 is prone to deviation during movement. In this embodiment, a limiting ring 13 is fixedly installed within the housing 1 by multiple fixing blocks. The cross-section of the inner wall of the limiting ring 13 is adapted to the movement trajectory of the connecting shaft 8, and the outer wall surface of the connecting shaft 8 is in contact with the limiting ring 13. This achieves the effect of the rotating gear 9 meshing with the locking teeth to limit the inner side of the connecting shaft 8, and the outer side of the connecting shaft 8 being in contact with the limiting ring 13 to limit the outer side of the limiting ring 13, thereby suppressing the deviation of the connecting shaft 8.

[0041] Mounting bracket: such as Figure 4As shown, the mounting bracket includes symmetrically arranged connecting rods 10, limiting rods located between the bottoms of the connecting rods 10, and collars 11 vertically slidably connected to the connecting rods 10. The top of the connecting rods 10 is fixed to the rotating gear 9. The limiting rods are provided with vertical placement holes 17 that are adapted to the rods of the valves 18. The inner sides of the connecting rods 10 are provided with sliding grooves 16. The upper surface of the limiting rods is provided with limiting grooves communicating with the sliding grooves 16. The collars 11 include an outer ring 1102 sleeved on the outside of the connecting rods 10, an inner ring 1101 located between the connecting rods 10, a connecting handle 1103 for connecting the inner ring 1101 and the outer ring 1102, and a slider 1104 provided on the inner ring 1101 and slidably connected to the limiting grooves and sliding grooves 16. Correspondingly, an adjustable plate with varying heights is installed inside the housing 1 via vertical channel steel. The cross-section of the adjustable plate is adapted to the movement path of the outer ring 1102. An adjusting groove is provided at the edge of the adjustable plate, and one end of the outer ring 1102 is slidably connected in the adjusting groove. The height of the adjusting groove is greater than that of the outer ring 1102 to prevent the outer ring 1102 from getting stuck when the height of the adjusting groove changes, allowing the outer ring 1102 to slide smoothly along the adjusting groove. The height difference between the adjustable plate and the height difference between the adjusting groove are greater than the depth of the placement hole 17. Under this structure, as... Figure 5 As shown, when the outer ring 1102 is at the lowest position of the adjusting groove, the inner ring 1101 is located in the limiting groove and does not contact the valve 18. At this time, the upper and lower ends of the valve 18 are exposed inside the housing 1, allowing for the spraying of a strong oxidizing agent. The middle part of the valve 18 is located inside the placement hole 17. Figure 6 As shown, when the outer ring 1102 is at the highest position of the adjustment groove, the outer ring 1102 drives the inner ring 1101 to move upward, which causes the inner ring 1101 to raise the position of the valve 18, thereby causing the middle part of the valve 18, which was originally located in the placement hole 17, to extend upward out of the placement hole 17, thus exposing it inside the housing 1 for spraying with a strong oxidant.

[0042] Spraying plate: The spraying plate is installed in the housing 1 by multiple vertical channel steels, including a first spraying plate 14 located near the lower position of the adjustment channel and a second spraying plate 15 located at the higher position of the adjustment channel. The front side of the first spraying plate 14 and the second spraying plate 15 are provided with several spray nozzles and are connected to a solvent tank.

[0043] Fan: The fan is located inside the housing 1 and blows air to the rear of the housing 1. Correspondingly, the rear of the housing 1 is provided with multiple air outlets.

[0044] In the implementation of this invention, the drive motor drives the conveyor belt 6 to rotate counterclockwise intermittently via the driving gear 2, the driven gear 3, and the grooved wheel 5. When the conveyor belt 6 stops moving, the worker wearing protective gear places the dried valve 18 onto the mounting bracket, so that the rod of the valve 18 passes through the placement hole 17 and the head of the valve 18 is above the placement hole 17. Then, the conveyor belt 6 drives the valve 18 to move along the rear side of the housing 1, causing the fan to blow on the surface of the valve 18, preventing the valve 18 from getting dusty during the process of drying and entering the housing 1, which would affect the subsequent passivation effect. Under the action of the conveyor belt 6, the valve 18 gradually reaches the front side of the housing 1 and is sprayed with a strong oxidant via the first spray plate 14 and the second spray plate 15 on the front side. The first spray plate 14 mainly sprays a strong oxidant onto the head of the valve 18 and the rod portion located below the placement hole 17. The second spray plate 15 mainly sprays a strong oxidant onto the rod portion originally located in the placement hole 17. During the movement of the connecting shaft 8 driven by the conveyor belt 6, the meshing between the rotating gear 9 and the locking teeth causes the rotating locking teeth to rotate, thereby driving the connecting shaft 8 to rotate, which in turn drives the mounting bracket and the valve 18 placed on the mounting bracket to rotate. This achieves the effect of rotating the valve 18 while it is moving, so that the spray plate can evenly spray all surfaces of the valve 18. Finally, the valve 18 reaches the opening on the right side of the housing 1, and the operator can remove the valve 18.

[0045] Based on the same inventive concept, the present invention provides a method for passivating the surface of a valve 18, comprising using the above-mentioned valve 18 surface passivation device to passivate the surface of the valve 18, the steps of which are as follows:

[0046] Step S1: The drive motor drives the conveyor belt 6 to rotate counterclockwise intermittently through the drive gear 2, driven gear 3 and grooved wheel 5. When the conveyor belt 6 stops moving, the worker wearing protective equipment places the dried valve 18 on the mounting frame, so that the rod of the valve 18 passes through the placement hole 17 and the head of the valve 18 is above the placement hole 17.

[0047] In step S2, the conveyor belt 6 drives the valve 18 to move along the rear side of the housing 1, causing the fan to blow on the surface of the valve 18. This prevents the valve 18 from getting dusty during the process of drying and entering the housing 1, which would affect the subsequent passivation effect. Under the action of the conveyor belt 6, the valve 18 gradually reaches the front side of the housing 1 and is sprayed with a strong oxidant by the first spray plate 14 and the second spray plate 15 on the front side. The first spray plate 14 mainly sprays the head of the valve 18 and the rod part located below the placement hole 17 with a strong oxidant, while the second spray plate 15 mainly sprays the rod part originally located in the placement hole 17 with a strong oxidant. During the process of the conveyor belt 6 driving the connecting shaft 8, the meshing between the rotating gear 9 and the clasp teeth causes the rotating clasp teeth to rotate, thereby driving the connecting shaft 8 to rotate, which in turn drives the mounting bracket and the valve 18 placed on the mounting bracket to rotate. This achieves the effect of rotating the valve 18 while driving it to move, so that the spray plate can evenly spray all surfaces of the valve 18.

[0048] Step S3: After the strong oxidant is sprayed, valve 18 reaches the opening on the right side of housing 1, and the staff can remove valve 18.

[0049] The method of this invention is used to passivate the valve 18. The connecting shaft 8 is transported by the conveyor belt 6, thereby transporting the mounting bracket and the valve 18 placed on the mounting bracket. After grinding, cleaning and drying, the valve 18 can be placed individually in the housing 1 for passivation. Compared with traditional batch passivation, this method ensures the effectiveness of the processing and avoids the problem of dust contamination on the surface of the valve 18 due to temporary storage. It also replaces the traditional process of manually or mechanically flipping the valve 18 during the passivation process. This not only effectively avoids damage to the surface of the valve 18, but also improves the flipping efficiency and passivation efficiency of the valve 18.

[0050] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A surface passivation device for engine parts, used for passivating valve surfaces, characterized in that, include: A housing, wherein one end of the housing is provided with an opening; A conveyor belt is vertically installed at the top of the box body, and several connecting shafts are uniformly and vertically rotatably connected to the conveyor belt. A drive mechanism for driving the intermittent movement of the conveyor belt is provided at the top of the box body. The rotating assembly includes rotating gears coaxially connected to the connecting shaft and several locking teeth disposed inside the housing. When the conveyor belt drives the connecting shaft to move, the rotating gears and locking teeth mesh with each other. The mounting bracket includes symmetrically arranged connecting rods, limiting rods located between the bottoms of the connecting rods, and a collar vertically slidably connected to the connecting rods. The tops of the connecting rods are fixed to a rotating gear. The limiting rods have vertical mounting holes that mate with the valve stems. The inner sides of the connecting rods are provided with grooves, and the upper surface of the limiting rods has a limiting groove communicating with the grooves. The collar includes an outer ring fitted around the connecting rods, an inner ring located between the connecting rods, a connecting handle for connecting the inner and outer rings, and a slider on the inner ring that slidably connects to the limiting grooves and the grooves. Within the housing, a vertical... An adjusting plate with varying heights is installed on the channel steel. The cross-section of the adjusting plate is adapted to the movement path of the outer ring. An adjusting groove is provided at the edge of the adjusting plate. One end of the outer ring is slidably connected in the adjusting groove. The height of the adjusting groove is greater than that of the outer ring to prevent the outer ring from getting stuck when the height of the adjusting groove changes, so that the outer ring can slide smoothly along the adjusting groove. The height difference between the adjusting plate and the height difference between the adjusting groove are greater than the depth of the placement hole. The adjusting groove has a smooth undulating surface and the height difference of the undulating surface is greater than the depth of the placement hole. A spray plate, located inside the housing, is used to spray a strong oxidizing agent onto the valves on the mounting bracket. When the outer ring is at the lowest position of the adjusting groove, the inner ring is in the limiting groove and does not contact the valve. The upper and lower ends of the valve are exposed in the housing and can be sprayed with strong oxidant. The middle part of the valve is located in the placement hole. When the outer ring is at the highest position of the adjustment groove, the outer ring drives the inner ring to move upward, which in turn raises the position of the valve. This causes the middle part of the valve, which was originally located in the placement hole, to extend upward out of the placement hole and be exposed in the housing for spraying with a strong oxidizing agent.

2. The surface passivation device for engine parts according to claim 1, characterized in that, It also includes a limiting ring, which is located inside the box. When the conveyor belt drives the connecting shaft to move, the side of the connecting shaft away from the tooth is in contact with the inner wall of the limiting ring.

3. The surface passivation device for engine parts according to claim 2, characterized in that, The cross-sections of the limiting ring and the retaining teeth are respectively adapted to the motion trajectories of the connecting shaft and the rotating gear.

4. The surface passivation device for engine parts according to claim 1, characterized in that, The sprayed plates are a plurality of ones and are distributed at the bends of the undulating surface.

5. The surface passivation device for engine parts according to claim 4, characterized in that, The adjustment grooves are evenly arranged along the movement trajectory of the mounting frame. The spray plate is located on one side of the box. Several fans are provided on the other side of the box. Several air outlets are evenly arranged on the side wall of the box near the fans.

6. A method for passivating valve surfaces, characterized in that, The valve surface is passivated using the surface passivation device according to any one of claims 1 to 5, and the specific steps are as follows: Step S1: Place the valve to be passivated onto the mounting bracket through the opening of the housing; In step S2, the conveyor belt drives the connecting shaft to move, thereby moving the valve on the mounting bracket. At the same time, the spraying plate sprays a strong oxidant onto the surface of the valve. During the movement, the rotating gear and the cleat mesh with each other, causing the rotating gear to rotate, which in turn drives the connecting shaft and the mounting bracket to rotate, thereby making the spraying plate evenly spray all surfaces of the valve. Step S3: After the spraying is completed, remove the valve from the opening of the housing.

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