Stainless steel metal part passivation equipment

Abstract

The invention relates to stainless steel metal part passivation equipment, and relates to the field of stainless steel metal part surface treatment equipment.The stainless steel metal part passivation equipment comprises a liquid storage pool with a containing cavity and a pool opening, and the liquid storage pool is provided with two pool side walls, namely the first pool wall and the second pool wall, right opposite to each other; each material receiving plate is provided with a hinged end and a free end, and the multiple material receiving plates are distributed in the first direction; the hinged end of the material receiving plate is rotationally connected to the pool wall of the liquid storage pool through a first rotating shaft, the free end of the material receiving plate inclines towards one side of the pool bottom, and a material falling gap is formed between the free end of the material receiving plate and the pool wall of the liquid storage pool; in every two adjacent first rotating shafts distributed in the first direction, one first rotating shaft is rotationally connected to the first pool wall, and the other first rotating shaft is rotationally connected to the second pool wall; and in the first direction, one extension spring is correspondingly connected between every two adjacent material receiving plates. The device has the effect of ensuring that each metal part can be in full contact with the passivation solution.

Description

Technical Field

[0001] The present application relates to the field of stainless steel metal part surface treatment equipment, and in particular to a stainless steel metal part passivation equipment. Background Art

[0002] Bolts, nuts and other stainless steel parts are the most commonly used parts in aviation equipment. Passivation of stainless steel parts is one of the common surface treatment processes in industrial production, which aims to improve the corrosion resistance and surface finish of metal parts. Traditional passivation methods usually use immersion or spraying methods to place metal parts in a solution containing specific chemical components to form a dense oxide film on their surface. This process not only improves the service life of metal parts, but also enhances their aesthetics.

[0003] At present, there are two main passivation methods commonly used in the industry: one is to soak the metal parts directly in the passivation tank, and the other is to use a spray device to spray the passivation liquid evenly on the surface of the metal parts. The immersion method is simple to operate and suitable for mass production, but there is a risk of metal parts accumulating in the passivation tank, resulting in some areas not being exposed to the passivation liquid, affecting the treatment effect. The spray method can better ensure uniform coverage of the metal surface, but the equipment cost is high and the maintenance is complicated.

[0004] However, the existing passivation methods still have some shortcomings in practical applications. In particular, for the processing of a large number of small metal parts, such as bolts and nuts, they are easy to accumulate in the passivation tank, resulting in insufficient contact between the metal parts and the passivation liquid, which in turn affects the processing quality and consistency of the product. Therefore, how to effectively avoid the accumulation of metal parts in the passivation tank and ensure that each metal part can fully contact the passivation liquid has become a technical problem that needs to be solved. . Summary of the invention

[0005] In order to ensure that each metal part can fully contact the passivation liquid, the present application provides a stainless steel metal part passivation device.

[0006] The present application provides a stainless steel metal parts passivation device adopts the following technical solution: A stainless steel metal part passivation device, comprising: A liquid storage tank having a containing chamber and a tank opening, wherein the liquid storage tank has two oppositely arranged tank side walls, namely a first tank wall and a second tank wall, and a tank depth direction of the liquid storage tank is parallel to the first direction; A plurality of receiving plates with hinged ends and free ends are distributed in a first direction; the hinged end of the receiving plate is rotatably connected to the pool wall of the liquid storage tank through a first rotating shaft, the free end is inclined toward the side of the pool bottom, and a material drop gap is formed between the free end of the receiving plate and the pool wall of the liquid storage tank, and the first rotating shaft is parallel to the second direction; among two adjacent first rotating shafts distributed in the first direction, one of the first rotating shafts is rotatably connected to the first pool wall, and the other first rotating shaft is rotatably connected to the second pool wall; And, a stretch spring is connected between each of two adjacent receiving plates in the first direction, and as the distance between the two adjacent receiving plates in the first direction increases, the deformation of the stretch spring increases accordingly.

[0007] By adopting the above technical solution, the material drop gap formed between the free end of the receiving plate and the wall of the liquid storage tank enables the products to be processed to fall layer by layer to the receiving plate of the next layer, avoiding the accumulation of products in the passivation tank and ensuring that each product can fully contact the passivation liquid, thereby improving the processing quality and uniformity of the product; at the same time, the design of the tension spring enables the receiving plate to produce slight vibrations when impacted by the product, which helps to further enhance the fluidity and uniform distribution of the passivation liquid and improve the efficiency and effect of passivation.

[0008] Optionally, a plurality of filter holes are provided on the receiving plate.

[0009] By adopting the above technical solution, a plurality of filter holes are provided on the receiving plate, so that the passivation liquid can flow through the receiving plate, thereby avoiding the accumulation of liquid above the receiving plate and ensuring the uniform distribution of the liquid, thereby improving the passivation effect and processing quality of the product to be processed.

[0010] Optionally, a blocking component is further included, and each filter hole is correspondingly provided with the blocking component, and the blocking component includes: The roller is located in the filter hole, and the roller is rotatably connected to the receiving plate through a second rotating shaft. The second rotating shaft is parallel to the second direction. In the first direction, the side of the roller close to the opening of the liquid storage tank extends to the side of the receiving plate close to the opening of the liquid storage tank.

[0011] By adopting the above technical solution, the rollers arranged in each filter hole can collide with the product to be processed when it passes through, causing the product to be processed to jump, increasing the contact area and time between the product and the passivation liquid, thereby improving the quality and uniformity of the surface treatment. At the same time, the rotating design of the rollers prevents the product to be processed from getting stuck during the rolling process, ensuring the smooth operation of the equipment.

[0012] Optionally, a water gap is formed between the outer peripheral wall of the roller shaft and the inner peripheral wall of the filter hole.

[0013] By adopting the above technical solution, a water gap is formed between the outer wall of the roller and the inner wall of the filter hole, so that the passivation liquid can flow smoothly through the filter hole, ensuring full contact between the product to be processed and the passivation liquid, avoiding clogging of the filter hole, and improving the passivation quality and uniformity of the product.

[0014] Optionally, along the second direction, a plurality of filter holes are arranged in each row, and the blocking assembly is correspondingly arranged in each filter hole; A plurality of rows of filter holes are arranged along the first direction; The filter holes in two adjacent rows are staggeredly distributed in the second direction.

[0015] By adopting the above technical solution, the product to be processed can collide with the roller multiple times in the direction from the hinged end to the free end of the receiving plate, so that the product to be processed can be in more complete contact with the liquid.

[0016] Optionally, the blocking component further includes: A sliding block, wherein the two ends of the roller shaft in the second direction are respectively connected with the sliding block, the roller shaft is rotatably connected to the sliding block via a second rotating shaft, and the sliding block is slidably connected to the inner wall of the filter hole of the receiving plate along the plate thickness direction of the receiving plate; And, a compression spring, one end of which is fixedly connected to the sliding block, and the other end of which is fixedly connected to the receiving plate, and the expansion and contraction direction of the compression spring is parallel to the plate thickness direction of the receiving plate.

[0017] By adopting the above technical solution, the roller can slide along the thickness direction of the receiving plate. When the product to be processed collides with the roller, the roller can slide elastically, thereby changing the motion trajectory of the product to be processed, making it form a jumping posture, increasing the contact area between the product to be processed and the passivation liquid, and further improving the passivation effect of the product. At the same time, the design of the sliding block and the compression spring enables the roller to quickly reset after being impacted, ensuring that each collision can effectively change the motion trajectory of the product to be processed and improve processing efficiency.

[0018] Optionally, a protrusion is provided on the outer peripheral wall of the roller shaft.

[0019] By adopting the above technical solution, the design of the protrusion increases the friction between the roller and the product to be processed, making it easier for the product to be processed to collide with the roller during the rolling process, further increasing the contact area between the product to be processed and the passivation liquid, and improving the passivation effect; at the same time, the presence of the protrusion can also enhance the stability of the product to be processed during the rolling process, avoiding uneven processing of the product due to too fast rolling.

[0020] Optionally, the protrusion is in the shape of a strip arranged along the second direction.

[0021] By adopting the above technical solution, the strip-shaped protrusions can generate more disturbances during the rolling process of the product to be processed, so that the passivation liquid can be more evenly covered on the surface of the product to be processed, further improving the processing effect of the product.

[0022] Optionally, the receiving plate closest to the bottom of the liquid storage tank is a bottom receiving plate; A discharge port is provided on the wall of the liquid storage tank, and the free end of the bottom receiving plate extends to the discharge port; Also included is a sealing component, the sealing component comprising: A sealing plate, the sealing plate being slidably connected to the liquid storage tank to open or close the discharge port of the liquid storage tank; When the liquid storage tank closes the discharge port, the free end of the bottom receiving plate contacts the sealing plate.

[0023] By adopting the above technical solution, the free end of the bottom receiving plate extends to the discharge port, so that the product to be processed can smoothly fall from the bottom receiving plate to the discharge port, which is convenient for collecting the processed metal parts; the sealing plate of the sealing assembly is slidably connected to the liquid storage tank, and the discharge port can be closed when necessary to prevent liquid leakage during the passivation process.

[0024] Optionally, the sealing assembly further comprises a linear drive member, wherein the linear drive member is connected between the sealing plate and the liquid storage tank to drive the sealing plate to slide along the liquid storage tank.

[0025] By adopting the above technical solution, the linear drive is connected between the sealing plate and the liquid storage tank, which can accurately control the sliding of the sealing plate, realize the rapid opening and closing of the discharge port, improve the operation convenience and automation of the equipment, reduce manual intervention, and reduce operation risks. At the same time, the use of the linear drive makes the movement of the sealing plate more stable and reliable, avoiding safety hazards caused by improper manual operation.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. By providing a rotating receiving plate and a tension spring connected between the receiving plates, the receiving plate can produce a slight vibration when impacted by the product, which helps to further enhance the fluidity and uniform distribution of the passivation liquid and improve the efficiency and effect of passivation; 2. The rollers installed in each filter hole can collide with the product to be processed when it passes through, causing the product to be processed to jump, increasing the contact area and time between it and the passivation liquid, thereby improving the quality and uniformity of the surface treatment; 3. The roller can slide along the thickness direction of the receiving plate. When the product to be processed collides with the roller, the roller can slide elastically, thereby changing the movement trajectory of the product to be processed, making it form a jumping posture, increasing the contact area between the product to be processed and the passivation liquid, and further improving the passivation effect of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 is a cross-sectional view of a liquid storage tank in an embodiment of the present application, and is intended to illustrate the internal structure of the liquid storage tank; Figure 3 is a schematic structural diagram of a material receiving plate in an embodiment of the present application at a first viewing angle; Figure 4 yes Figure 3 A magnified view of part A; Figure 5 It is a schematic diagram of the structure of the receiving plate and the roller in the embodiment of the present application; Figure 6 It is a structural schematic diagram of the slide groove and the sliding block in the embodiment of the present application; Figure 7 is a schematic structural diagram of the material receiving plate in the embodiment of the present application at a second viewing angle; Figure 8 yes Figure 7 A magnified view of part B; Fig. 9 yes Figure 7 Magnified view of part C.

[0028] Explanation of the reference numerals in the accompanying drawings: 1. liquid storage tank; 11. containing chamber; 12. tank mouth; 13. material drop gap; 14. first tank wall; 15. second tank wall; 16. material outlet; 2. material receiving plate; 2a. first material receiving plate; 2b. second material receiving plate; 21. hinged end; 22. free end; 23. filter hole; 231. water gap; 24. slide groove; 25. material drop hole; 3. tension spring; 4. sealing assembly; 41. sealing plate; 42. linear drive member; 5. drain pipe; 51. valve; 6. universal hinge assembly; 61. ball seat; 62. universal ball; 7. blocking assembly; 71. roller shaft; 711. protrusion; 72. sliding block; 73. compression spring; 8. torsion spring; 9. spring. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-6The present application is further described in detail. For ease of description, the present application introduces directional words such as a first direction, a second direction, and a third direction to form a three-dimensional reference direction. The directional words used, such as "a first direction, a second direction, and a third direction", can be specifically shown with reference to the figure, where X represents the first direction X, Y represents the second direction Y, and Z represents the third direction Z. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0030] The present application embodiment discloses a stainless steel metal part passivation device. Figure 1 , Figure 2 and Figure 3 The stainless steel metal part passivation device comprises a liquid storage tank 1 having a containing chamber 11 and a tank opening 12, a plurality of receiving plates 2 located in the liquid storage tank 1, and a tension spring 3 connected between two adjacent receiving plates 2; The depth direction of the liquid storage tank 1 is parallel to the first direction. In the first direction, a plurality of receiving plates 2 are distributed. The receiving plate 2 has a hinged end 21 and a free end 22. The hinged end 21 of the receiving plate 2 is rotatably connected to the inner wall of the liquid storage tank 1 via a first rotating shaft. The first rotating shaft is parallel to the second direction. The free end 22 of the receiving plate 2 is inclined toward the bottom of the liquid storage tank 1 in a direction away from the first rotating shaft. A material drop gap 13 is formed between the free end 22 of the receiving plate 2 and the inner wall of the liquid storage tank 1. The liquid storage tank 1 has two opposite tank side walls, one of which is the first tank wall 14, and the other is the second tank wall 15. The first tank wall 14 and the second tank wall 15 are both arranged perpendicular to the third direction. The first tank wall 14 and the receiving plate 2 are rotatably connected to the first tank wall 14 through the first rotating shaft. The first receiving plate 2a is a receiving plate 2, and a blanking gap 13 is formed between the first receiving plate 2a and the second tank wall 15. The receiving plate 2 is rotatably connected to the second tank wall 15 through the first rotating shaft. The second receiving plate 2b is a receiving plate 2b, and a blanking gap 13 is formed between the second receiving plate 2b and the first tank wall 14. In the first direction, the first receiving plate 2a and the second receiving plate 2b are staggered, and the products to be processed fall layer by layer from the blanking gap 13 of each layer to the receiving plate 2 of the lower layer.

[0031] Reference Figure 2 The receiving plate 2 near the bottom of the liquid storage tank 1 is the bottom receiving plate 2. The wall of the liquid storage tank 1 is provided with a discharge port 16 at the bottom receiving plate 2. After the product falls to the bottom receiving plate 2, it can be discharged from the liquid storage tank 1 through the discharge port 16; In order to close the discharge port 16, in some embodiments of the present application, a sealing assembly 4 is further included, the sealing assembly 4 includes a sealing plate 41 and a linear drive member 42, the sealing plate 41 is located outside the liquid reservoir 1 and contacts the outer wall of the liquid reservoir 1, the sealing plate 41 is slidably connected to the outer wall of the liquid reservoir 1 to open or close the discharge port 16, in the present disclosure, the sliding direction of the sealing plate 41 is parallel to the first direction; the linear drive member 42 is connected between the liquid reservoir 1 and the sealing plate 41 to drive the sealing plate 41 to slide along the liquid reservoir 1, the linear drive member 42 in the present disclosure is a cylinder, specifically, the cylinder body of the linear drive member 42 is fixedly connected to the outer wall of the liquid reservoir 1, and the piston rod of the linear drive member 42 is fixedly connected to the sealing plate 41 to drive the sealing plate 41 to slide along the liquid reservoir 1; Before opening the discharge port 16, the water in the liquid storage tank 1 can be discharged first. For this purpose, a drain pipe 5 is fixedly connected to the bottom of the liquid storage tank 1. The drain pipe 5 is located on the side of the bottom receiving plate 2 away from the tank port 12 of the liquid storage tank 1, and a valve 51 for controlling the water flow of the drain pipe 5 is installed on the drain pipe 5. If the water in the liquid storage tank 1 needs to be discharged, the water in the liquid storage tank 1 can be discharged by simply opening the valve 51.

[0032] Reference Figure 2 , Figure 3 and Figure 4 In the first direction, a tension spring 3 is connected between two adjacent receiving plates 2. When the distance between the two adjacent receiving plates 2 in the first direction increases, the deformation of the tension spring 3 increases, and the force that drives the two receiving plates 2 to rotate away from each other is stored; after the product to be processed falls to the receiving plate 2 of the next layer, a certain impact force can be generated on the receiving plate 2 of the next layer, so that the receiving plate 2 of the next layer shakes with the tension spring 3; Between two adjacent receiving plates 2, multiple tension springs 3 are distributed in the second direction; in the present disclosure, a universal hinge assembly 6 is connected between the receiving plate 2 and the tension spring 3, and the universal hinge assembly 6 includes a ball seat 61 and a universal ball 62. The ball seat 61 is fixedly connected to the receiving plate 2, and the universal ball 62 is freely rotatably connected to the ball seat 61. The end of the tension spring 3 is fixedly connected to the universal ball 62 so that the tension spring 3 can rotate freely along the receiving plate 2.

[0033] Reference Figure 4 , Figure 5 and Figure 6 In some embodiments of the present application, the receiving plate 2 is provided with filter holes 23 along its thickness. On the receiving plate 2, multiple rows of filter holes 23 are distributed, each row has multiple filter holes 23, and the multiple filter holes 23 in each row are distributed sequentially along the second direction. The multiple rows of filter holes 23 are arranged sequentially in the direction from the hinge end 21 to the free end 22 of the receiving plate 2, and the filter holes 23 in two adjacent rows are staggered in the second direction.

[0034] Reference Figure 4 , Figure 5 and Figure 6 In some embodiments of the present application, a blocking assembly 7 is correspondingly provided in each filter hole 23, and the blocking assembly 7 includes a roller 71 located in the filter hole 23; the roller 71 is rotatably connected to the inner peripheral wall of the filter hole 23 through a second rotating shaft, and the second rotating shaft is arranged parallel to the second direction; the side of the roller 71 close to the pool opening 12 of the liquid storage tank 1 extends to the side of the receiving plate 2 close to the pool opening 12 of the liquid storage tank 1, and a water-passing gap 231 is formed between the outer peripheral wall of the roller 71 and the inner peripheral wall of the filter hole 23; preferably, a protrusion 711 is convexly provided on the outer peripheral wall of the roller 71, and in the present disclosure, the protrusion 711 is in the shape of a strip arranged parallel to the second direction, and a water-passing gap 231 is also formed between the protrusion 711 and the inner wall of the filter hole 23; In some embodiments of the present application, the roller shaft 71 is slidably connected to the receiving plate 2 in the plate thickness direction of the receiving plate 2. For this purpose, the blocking assembly 7 also includes a sliding block 72, and a sliding block 72 is correspondingly provided at each end of the roller shaft 71, and the second rotating shaft is rotatably connected to the sliding block 72, and the sliding block 72 is slidably connected to the receiving plate 2 in the plate thickness direction of the receiving plate 2; the blocking assembly 7 also includes a compression spring 73, the expansion and contraction direction of the compression spring 73 is parallel to the plate thickness direction of the receiving plate 2, and one end of the compression spring 73 is fixedly connected to the receiving plate 2, and the other end is fixedly connected to the sliding block 72, so as to realize the elastic sliding of the sliding block 72 in the plate thickness direction of the receiving plate 2; specifically, a compression spring 73 is correspondingly provided at each end of the sliding direction of the sliding block 72, and the two compression springs 73 are both in a compressed state that can continue to be compressed; In order to enable the sliding block 72 to slide, a slide groove 24 is opened on the inner wall of the filter hole 23. The sliding block 72 is adapted to be located in the slide groove 24 and can slide along the thickness direction of the receiving plate 2 under the guidance of the inner wall of the slide groove 24. The compression spring 73 is also located in the slide groove 24.

[0035] Refer to 2. Figure 7 and Figure 8 In order to prevent the receiving plate 2 from rotating directly to a vertical state under the action of its own weight, a torsion spring 8 is sleeved on the first rotating shaft, one end of the torsion spring 8 is fixedly connected to the receiving plate 2, and the other end is fixedly connected to the wall of the liquid storage tank 1. When there is no workpiece on the receiving plate 2, under the action of the torsion spring 8, the free end 22 of the receiving plate 2 is inclined toward the bottom of the liquid storage tank 1 in the direction away from the first rotating shaft, and a blanking gap 13 is formed between the free end 22 of the receiving plate 2 and the inner side wall of the liquid storage tank 1; when a workpiece is carried on the receiving plate 2, the receiving plate 2 will rotate downward, and at this time the torsion spring 8 has a force driving the receiving plate 2 to rotate toward the outlet side, so that the receiving plate 2 can maintain a posture in which the free end 22 of the receiving plate 2 is inclined toward the bottom of the liquid storage tank 1 in the direction away from the first rotating shaft.

[0036] Reference Fig. 9In some embodiments of the present application, a plurality of blanking holes 25 are provided at the free end 22 of the receiving plate 2. The blanking holes 25 penetrate the receiving plate 2 along the plate thickness direction of the receiving plate 2. The plurality of blanking holes 25 are spaced apart in the second direction so that the free end 22 of the receiving plate 2 forms a serrated structure. The blanking holes 25 are used for dropping workpieces. Each drop hole 25 is provided with a corresponding spring piece 9 , which is inclined toward the bottom of the liquid storage tank 1 in the direction from the hinge end 21 to the free end 22 of the receiving plate 2 , so that the workpiece can jump and fall along the spring piece 9 .

[0037] The implementation principle of the stainless steel metal parts passivation device of the present application embodiment is as follows: first, add the passivation liquid into the liquid reservoir 1 until the passivation liquid immerses the receiving plate 2 closest to the pool opening 12 of the liquid reservoir 1, and then pour the aviation bolts and nuts to be processed into the liquid reservoir 1 from the pool opening 12 of the liquid reservoir 1, and the products to be processed will roll down along the receiving plate 2, and fall from the blanking gap 13 onto the receiving plate 2 of the next layer, and fall step by step; When the product to be processed rolls down along the receiving plate 2, if the product to be processed collides with the roller 71, the roller 71 will be driven to slide elastically, which may make the product to be processed form a jumping posture. Compared with the flat-plate sliding method, it can make the product to be processed contact with the passivation liquid more fully, so that the surface treatment of the product to be processed can be more sufficient, and the product yield rate can be improved; Furthermore, as the processed product rolls down the receiving plate 2 and rolls down from the upper receiving plate 2 to the lower one, certain vibrations will be generated. Especially when the processed product falls down to the lower receiving plate 2, the tension spring 3 will be stretched and contracted, thereby generating greater vibrations. During the vibration, the passivation liquid will be shaken to prevent the passivation liquid from settling and stratifying. The jumping of the processed product itself and the shaking of the passivation liquid can make the surface treatment of the processed product more thorough.

[0038] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A stainless steel metal parts passivation device, characterized in that: include: A liquid storage tank (1) having a containing chamber (11) and a tank opening (12), wherein the liquid storage tank (1) has two tank side walls arranged opposite to each other, namely a first tank wall (14) and a second tank wall (15), and a tank depth direction of the liquid storage tank (1) is parallel to the first direction; A plurality of receiving plates (2) having hinged ends (21) and free ends (22), wherein the plurality of receiving plates (2) are distributed in a first direction; the hinged end (21) of the receiving plate (2) is rotatably connected to the wall of a liquid storage tank (1) via a first rotating shaft, the free end (22) is inclined toward the bottom of the tank, and a material drop gap (13) is formed between the free end (22) of the receiving plate (2) and the wall of the liquid storage tank (1), and the first rotating shaft is parallel to the second direction; of two adjacent first rotating shafts distributed in the first direction, one of the first rotating shafts is rotatably connected to the first tank wall (14), and the other first rotating shaft is rotatably connected to the second tank wall (15); Furthermore, a tension spring (3) is connected between each of two adjacent receiving plates (2) in a first direction, and as the distance between the two adjacent receiving plates (2) in the first direction increases, the deformation of the tension spring (3) increases accordingly.

2. A stainless steel metal parts passivation device according to claim 1, characterized in that: The material receiving plate (2) is provided with a plurality of filter holes (23).

3. A stainless steel metal parts passivation device according to claim 2, characterized in that: It also includes a blocking component (7), each filter hole (23) is correspondingly provided with the blocking component (7), and the blocking component (7) includes: A roller (71) is located in the filter hole (23), and the roller (71) is rotatably connected to the receiving plate (2) via a second rotating shaft, the second rotating shaft is parallel to the second direction, and in the first direction, the side of the roller (71) close to the pool opening (12) of the liquid storage tank (1) extends to the side of the receiving plate (2) close to the pool opening (12) of the liquid storage tank (1).

4. A stainless steel metal part passivation device according to claim 3, characterized in that: A water-passing gap (231) is formed between the outer peripheral wall of the roller shaft (71) and the inner peripheral wall of the filter hole (23).

5. A stainless steel metal part passivation device according to claim 4, characterized in that: Along the second direction, a plurality of filter holes (23) are arranged in each row, and each filter hole (23) is correspondingly provided with the blocking assembly (7); A plurality of rows of filter holes (23) are arranged along a first direction; The plurality of filter holes (23) in two adjacent rows are staggeredly distributed in the second direction.

6. A stainless steel metal part passivation device according to claim 5, characterized in that: The blocking component (7) further comprises: A sliding block (72), wherein the two ends of the roller shaft (71) in the second direction are respectively connected to the sliding block (72), the roller shaft (71) is rotatably connected to the sliding block (72) via a second rotating shaft, and the sliding block (72) is slidably connected to the inner wall of the filter hole (23) of the receiving plate (2) along the plate thickness direction of the receiving plate (2); And, a compression spring (73), one end of the compression spring (73) is fixedly connected to the sliding block (72), and the other end is fixedly connected to the receiving plate (2), and the expansion and contraction direction of the compression spring (73) is parallel to the plate thickness direction of the receiving plate (2).

7. A stainless steel metal part passivation device according to any one of claims 3 to 6, characterized in that: The outer peripheral wall of the roller shaft (71) is provided with a protrusion (711).

8. The stainless steel metal part passivation equipment according to claim 7, characterized in that: The protrusion (711) is in the shape of a strip arranged along the second direction.

9. A stainless steel metal part passivation device according to claim 8, characterized in that: The receiving plate (2) closest to the bottom of the liquid storage tank (1) is the bottom receiving plate (2); A discharge port (16) is provided on the wall of the liquid storage tank (1), and a free end (22) of the bottom receiving plate (2) extends to the discharge port (16); It also includes a sealing component (4), wherein the sealing component (4) includes: A sealing plate (41), the sealing plate (41) being slidably connected to the liquid storage tank (1) to open or close the discharge port (16) of the liquid storage tank (1); When the liquid storage tank (1) closes the discharge port (16), the free end (22) of the bottom receiving plate (2) contacts the sealing plate (41).

10. A stainless steel metal part passivation device according to claim 9, characterized in that: The sealing assembly (4) further comprises a linear drive member (42), wherein the linear drive member (42) is connected between the sealing plate (41) and the liquid storage tank (1) so as to drive the sealing plate (41) to slide along the liquid storage tank (1).

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