A fish scale plate type self-adaptive sealing device

Abstract

The application discloses a fish scale plate type self-adaptive sealing device and belongs to the technical field of automobile coating production lines. The device comprises a double-layer composite fish scale plate sealing structure and a receiving assembly. The double-layer composite fish scale plate sealing structure is connected to an upper base and comprises fish scale plates and fluororubber plates attached to the outer sides of the fish scale plates. A plurality of fish scale plates are arranged in a fish scale shape along the extension direction of the upper base and are overlapped in sequence to form a fish scale-shaped overlapping sealing structure, which is used to form a primary sealing barrier to prevent the overflow of sprayed water. The fluororubber plates are used to elastically contact the passing vehicle bodies and form a secondary flexible sealing. The receiving assembly comprises a support plate fixed to a lower base, and the support plate is fixed with a continuously extended receiving sealing layer. In a free state, the lower edges of the double-layer composite fish scale plate sealing structures elastically abut against the surface of the receiving sealing layer. The application solves the technical problems of the existing sealing device, such as insufficient anti-splashing performance, easy scratching of the vehicle body and inconvenient maintenance.

Description

Technical Field

[0001] This invention belongs to the technical field of automotive painting production lines, specifically, it relates to a fish-scale plate type adaptive sealing device. Background Technology

[0002] In automotive pre-treatment production lines, car bodies undergo high-pressure spraying processes such as degreasing, phosphating, and electrophoresis. The sealing condition of the chamber's inlet and outlet directly affects the operational stability of the pre-treatment line and the workshop's production environment. Currently, the commonly used inlet and outlet sealing devices in domestic pre-treatment lines are mostly single-layer stainless steel fish-scale plate structures. Under actual high-pressure spraying conditions, these conventional single-layer metal fish-scale plate sealing structures are difficult to prevent splashing and overflow of high-pressure spray water due to the gaps in the plates themselves and rigid deformation. This can easily lead to the loss of spray water and chemicals, and even water accumulation on the outside of the chamber. In addition, when different car models or car bodies with complex contours pass through the process inlet and outlet, the rigid single-layer metal plates are prone to rigid friction with the car body surface, which may cause scratches on the car body surface or cause the metal plates themselves to undergo plastic deformation and be damaged. Moreover, the existing sealing devices typically have fixed and unadjustable plate installation angles and overlaps, making it impossible to actively adapt to changes in the direction of the spray water flow. They also lack sufficient adaptive fit to the contours of different vehicle models and lack good recovery elasticity after long-term impact and wear, resulting in higher costs and downtime pressure for later maintenance.

[0003] In summary, developing an adaptive sealing device that is structurally reliable, easy to operate, and can effectively prevent spray water from overflowing and avoid rigid friction against the vehicle body is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention discloses a fish-scale plate type adaptive sealing device to solve the technical problems of insufficient anti-splash performance of existing single-layer stainless steel fish-scale plate sealing devices, which leads to water overflow and easy rigid scraping damage to passing vehicle bodies.

[0005] To achieve the above objectives, the present invention provides a fish-scale plate type adaptive sealing device, comprising: A double-layer composite fish-scale plate sealing structure is connected to an upper base. The double-layer composite fish-scale plate sealing structure includes fish-scale plates and a fluororubber plate attached to the outside of the fish-scale plates. Several fish-scale plates are arranged in a staggered manner along the extension direction of the upper base to form a fish-scale-shaped overlapping sealing structure, which constitutes a primary sealing barrier to prevent spray water from overflowing. The fluororubber plate is used to make elastic contact with the passing vehicle body and form a secondary flexible seal. The receiving component includes a support plate fixed to the lower base, and a continuously extending receiving sealing layer is fixed on the support plate. In the free state, the lower edge of each of the double-layer composite fish scale plate sealing structures elastically abuts against the surface of the receiving sealing layer.

[0006] Preferably, a buffer water guiding cavity is formed between the fish scale plate and the fluororubber plate, and the buffer water guiding cavity is used to guide the spray water backflow.

[0007] Preferably, the fish scale plate is made of stainless steel spring steel plate; the thickness of the fish scale plate is 0.2mm; and the thickness of the fluororubber plate is 2mm.

[0008] Preferably, the fish scale plate is installed on the upper base at an inclined angle of 15°-30°.

[0009] Preferably, the inclined installation direction of the fish scale plate is adapted to the spray water flow direction in the pretreatment chamber, so as to use the pushing pressure of the spray water flow to press the fish scale plate together.

[0010] Preferably, it also includes a fastening assembly. The double-layer composite fish scale plate sealing structure is modularly installed on the upper base through the fastening assembly. The fastening assembly includes an inclined mounting plate with a plurality of welded studs evenly distributed on the inclined mounting plate. The upper ends of the fish scale plate and the fluororubber plate are provided with mutually aligned mounting holes and are fitted together on the corresponding welded studs, and are threadedly locked by a large washer and a cap nut.

[0011] Preferably, the overlap width between two adjacent double-layer composite fish scale plate sealing structures is 100mm, and the cutting width of a single double-layer composite fish scale plate sealing structure is 300mm.

[0012] Preferably, the double-layer composite fish scale plate sealing structure near the entrance of the conveying channel has a beveled edge along the cutting direction of the hanger on the edge facing the side of the hanger, and the beveled edge has a smooth transition rounded chamfer at the intersection of the hanging bottom edge of the double-layer composite fish scale plate sealing structure.

[0013] Preferably, the inclination angle of the oblique rolled edge is 77°, and the radius of the smooth transition rounded chamfer is 30mm.

[0014] Preferably, the receiving sealing layer is a fluororubber layer; the fluororubber layer is fixed to the inclined surface of the support plate by a plurality of pop rivets.

[0015] Compared to the aforementioned background technology, the fish-scale plate type adaptive sealing device provided by this invention includes a double-layer composite fish-scale plate sealing structure connected to an upper base and a receiving component fixed to a lower base. The double-layer composite fish-scale plate sealing structure is composed of multiple longitudinally overlapping fish-scale plates and a fluororubber plate adhered to their outer sides. During device operation, the inner fish-scale plates act as a primary rigid sealing barrier, intercepting most of the direct impact of sprayed water, while the outer flexible fluororubber plate acts as a secondary seal, blocking residual water flow that may penetrate the gaps between the plates. Since the flexible fluororubber plate directly faces the process channel, when the vehicle body or hanger enters or exits the chamber, the vehicle body surface and the fluororubber plate form an elastic sliding contact, thus avoiding the rigid abrasion of the vehicle body surface by traditional metal seals. The sealing units are arranged in an independent, fish-scale-like, discrete, overlapping pattern. When the vehicle body passes through and pushes against the local sealing structure, the bending deformation of the forced part is confined within the current unit, making it difficult for the deformation to spread over a large area to both sides of the channel through the material. This allows the adjacent sealing units that are not in contact with the vehicle body to remain closed under the action of their own elasticity and water flow pressure. Operators can optimize the overlap and tilt installation angle by adjusting the fastening components to better adapt to different spray conditions. The sealing device provided by this invention has a simple structure, low production and maintenance costs, and can balance anti-splash sealing effect and vehicle body flexibility protection, exhibiting good adaptability to different operating conditions. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the fish-scale plate type adaptive sealing device of the present invention; Figure 2 for Figure 1 Enlarged view at point I; Figure 3 This is a schematic diagram of the double-layer composite fish scale plate sealing structure of the fish scale plate adaptive sealing device of the present invention, showing the fish scale-shaped overlapping seal.

[0018] In the diagram: 1. Double-layer composite fish scale plate sealing structure; 10. Upper base; 11. Fish scale plate; 12. Fluororubber plate; 13. Beveled rolled edge; 2. Receiving component; 20. Lower base; 21. Support plate; 3. Fastening component; 30. Beveled mounting plate; 31. Welded stud; 32. Large washer; 33. Cap nut. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0020] This invention provides a fish-scale plate type adaptive sealing device; please refer to the appendix of the specification. Figures 1 to 3 This application includes a double-layer composite fish-scale plate sealing structure 1 and a receiving component 2 disposed below it. Specifically, the double-layer composite fish-scale plate sealing structure 1 is connected to an upper base 10 above the inlet and outlet of the chamber. The double-layer composite fish-scale plate sealing structure 1 includes fish-scale plates 11 and a flexible fluororubber plate 12 that is surface-contactly attached to the outer surface of the fish-scale plates 11. In order to construct a continuous physical protective curtain in the longitudinal direction of the passage, several fish-scale plates 11 are arranged in an overlapping manner along the horizontal extension direction of the upper base 10, thereby forming an overall fish-scale-shaped overlapping sealing structure in appearance. In this dual-layer composite system, the inner sets of fish-scale plates 11 directly resist the impact of the first water flow under high-pressure spray conditions inside the pretreatment chamber, forming a primary sealing barrier to prevent the spray water from overflowing. The fluororubber plate 12, fitted to the backwater side of the fish-scale plates 11, is specifically designed to create a flexible sliding contact with the vehicle profile or workpiece fixture passing through the channel, thus forming a secondary flexible seal to block penetrating residual water flow. The receiving component 2 includes a support plate 21 fixed to the lower base 20. A continuously extending receiving sealing layer 22 is fixed to the upward-sloping surface of the support plate 21. The receiving sealing layer 22 is a fluororubber layer. The fluororubber layer is fixed to the inclined surface of the support plate 21 by multiple blind rivets, with the hole spacing between adjacent blind rivets specifically set to 500mm. In the normal closed state without being pushed by the moving hoist or the vehicle body, the lowest overhanging bottom edge of each of the double-layer composite fish scale plate sealing structures 1 maintains elastic contact with the outer surface of the receiving sealing layer due to its own rigidity and natural vertical force, thereby achieving the sealing of the equipment passage.

[0021] To achieve both rigid interception and targeted management of minute penetrating water flows, the dual-layer composite sealing system has been further optimized in terms of material selection and spatial arrangement. Specifically, the fish-scale plate 11 can be made of a material with high deformation recovery performance, for example, in this embodiment, it is made of stainless steel spring steel plate. To balance the deformation recovery moment and the material's bending resistance, the thickness of the fish-scale plate 11 can be limited to 0.2 mm. Correspondingly, the fluororubber plate 12, which is attached to its outer surface, is made of a high-density, wear-resistant fluororubber material, which has excellent corrosion resistance and flexible barrier properties, and its thickness can be processed to 2 mm. Due to the difference in rigidity between the two materials at the macroscopic level and the natural deformation gaps during assembly, a hollow gap will be formed between the fish-scale plate 11 and the fluororubber plate 12 in the stacked state. This hollow gap serves as a buffer water guiding cavity. When a small amount of high-pressure water penetrates the overlapping gaps of the primary barrier plates, the buffer water guiding cavity can intercept it and guide it downwards along the cavity wall. The bottom of the buffer water guiding cavity extends to an outlet opening towards the inside of the chamber, thereby allowing the collected spray water to flow back into the pretreatment chamber, achieving water recycling.

[0022] Furthermore, in order to actively adapt to and utilize the external hydrodynamic characteristics under the process conditions, the geometric posture of the fish-scale plate 11 on the upper base 10 is limited and adjusted. Specifically, the fish-scale plate 11 is suspended and installed on the mounting base in an overall inclined posture, and its specific installation angle relative to the vertical plane can be limited to the range of 15°-30°. In terms of spatial alignment, the tilting and swinging direction of the fish-scale plate 11 is adapted to the straight jet trajectory direction of the high-pressure spray water flow in the pretreatment chamber. For example, during the high-pressure degreasing spray in pretreatment, this inclined posture causes the spray water flow to generate a normal component force pointing towards the inside of the chamber when it impacts the sealing curtain. This invention cleverly utilizes the pushing pressure of the spray water flow to press the overlapping fish-scale plates 11 in the opposite direction, so that the overlapping surfaces between the plates close more tightly under the impact of the water flow. In order to ensure the continuity of longitudinal shielding while taking into account the flexibility during mechanical bending deformation, the longitudinal overlap width between two adjacent double-layer composite fish scale plate sealing structures 1 can be designed to be 100mm, while the overall cutting width of a single double-layer composite fish scale plate sealing structure 1 in the transverse direction can be controlled to be 300mm.

[0023] To improve the convenience of component replacement under long-term, high-frequency use, this adaptive sealing device is also equipped with a quick-release connection architecture. Specifically, the invention also includes a fastening assembly 3 for implementing modular positioning suspension. The fastening assembly 3 specifically includes an inclined mounting plate 30 fixedly connected to the upper base 10. On the outwardly inclined mounting surface of the inclined mounting plate 30, several sets of high-strength welded studs 31 are horizontally and equidistantly welded along the longitudinal direction of the channel. At the corresponding receiving end, the double-layer composite fish scale plate sealing structure 2, which serves as the fastening receiving end, has a through hole at its top fixing part, that is, the upper edges of the fish scale plate 1 and the fluororubber plate 12 are both machined with mutually aligned mounting holes. In actual assembly, after the fish scale plate 1 and the fluororubber plate 12 are stacked, they are jointly fitted onto the corresponding welded studs 31, then large washers 32 are sequentially fitted onto the outermost side, and finally, the threads are locked using a cap nut 33 of the anti-loosening type. Based on this structural design, the entire sealing system is transformed into discrete unit modules with uniform dimensions. Under long-term heavy working conditions and wear, if a unit suffers accidental damage, maintenance personnel only need to unscrew the cap nut 33 at the top of the corresponding unit to replace the single piece, eliminating the cumbersome process of disassembling the pressure strip over a large area.

[0024] Furthermore, since the workpiece hangers on the overhead conveyor are prone to causing significant collision interference to the sealing structure at the edges when carrying different car bodies for the first time into or out of the chamber passage entrance, this invention specifically optimizes the kinematics of the entrance end components. Specifically, the set of double-layer composite fish-scale plate sealing structures 1 near the conveyor passage entrance has a diagonally extending beveled edge 13 machined along the forward direction of the hanger's entry on its longitudinal edge facing the hanger's entry side. Simultaneously, to prevent sharp corners from damaging the car body or hanger, the area where the beveled edge 13 intersects with the horizontal overhanging bottom edge of the double-layer composite fish-scale plate sealing structure 1 is machined with a smooth transition rounded chamfer. Specifically, in terms of dynamic buffering parameters, the inclination angle of the beveled edge 13 relative to the vertical plane is machined to 77°, while the radius of curvature of the smooth transition rounded chamfer is controlled to 30mm. The combination of this specific angle and the smooth chamfer plays a role in the mechanical structure as a sloped buffer guide, which can smoothly transform the instantaneous rigid frontal collision of the hanger into a continuous linear pushing and sliding along the arc slope, reducing the phenomenon of local stress concentration, thereby helping to improve the mechanical life of the first end sealing unit.

[0025] The detailed operating principle of the fish-scale plate adaptive sealing device of this invention under dynamic transit conditions is as follows: When the hanger upright of the suspended conveyor carries the vehicle body forward and enters the process channel, the hanger upright first contacts the inclined rolled edge 13 and the smooth transition arc chamfer near the entrance of the conveyor channel. Through the sliding guidance of the 77° inclined surface and the 30mm radius arc, the rigid impact is converted into a smooth linear pushing force. As the side wall of the vehicle body fully cuts into the channel, the vehicle body wall mainly applies an outward normal thrust to the local double-layer composite fish-scale plate sealing structure 1 located directly in front of its current trajectory. The thrust overcomes the bending stiffness of the 0.2mm stainless steel spring steel plate, i.e., the fish-scale plate 11, forcing the first flexible layer, along with the fish-scale plate 11, to bend outward with the top welded stud 31 as the locking point, thus creating space for the vehicle body to pass through. Simultaneously, the 2mm thick fluororubber plate 12 maintains a flexible and elastic fit with the vehicle body surface, effectively preventing rigid scraping of the vehicle body surface by traditional single-layer metal plates. Because the upper sealing curtain is physically cut into independent 300mm wide units laterally with a 100mm overlap, the local deformation deflection of the forced unit is confined within the current deformed unit, and its deformation stress is not easily transmitted to adjacent sealing units through the lateral material. Therefore, the remaining double-layer composite fish-scale plate sealing structures 1, which are not subjected to vehicle body compression, maintain their initial closed contact state under the combined action of the restoring elasticity of their own spring steel plates and the pressure of the oncoming water flow at an inclination angle of 15°-30°, reducing the possibility of leakage through gaps. Once the vehicle body or hanger has completely moved away from the pressure area, the thrust is unloaded, and the elastic potential energy stored inside the fish scale plate 11 is converted into a restoring torque, driving the fluororubber plate 12 to rebound in the opposite direction. Its lower edge is then elastically pressed back onto the surface of the receiving sealing layer on the support plate 21 of the lower base 20, restoring the static locking seal.

[0026] This article uses specific embodiments to illustrate the principles and implementation methods of the present invention. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the present invention.

Claims

1. A fish-scale plate type adaptive sealing device, characterized in that, include: A double-layer composite fish scale plate sealing structure (1) is connected to an upper base (10). The double-layer composite fish scale plate sealing structure (1) includes a fish scale plate (11) and a fluororubber plate (12) attached to the outside of the fish scale plate (11). Several fish scale plates (11) are arranged in a series of overlapping arrangements along the extension direction of the upper base (10) to form a fish scale-shaped overlapping sealing structure, which is used to form a primary sealing barrier to prevent the overflow of spray water. The fluororubber plate (12) is used to make elastic contact with the passing vehicle body and form a secondary flexible seal. The receiving component (2) includes a support plate (21) fixed to the lower base (20). The support plate (21) is provided with a continuously extending receiving sealing layer (22). In the free state, the lower edge of each of the double-layer composite fish scale plate sealing structures (1) elastically abuts against the surface of the receiving sealing layer (22).

2. The fish-scale plate type adaptive sealing device according to claim 1, characterized in that, A buffer water guiding cavity is formed between the fish scale plate (11) and the fluororubber plate (12), and the buffer water guiding cavity is used to guide the spray water backflow.

3. The fish-scale plate type adaptive sealing device according to claim 1, characterized in that, The fish scale plate (11) is made of stainless steel spring steel plate; the thickness of the fish scale plate (11) is 0.2mm; the thickness of the fluororubber plate (12) is 2mm.

4. The fish-scale plate type adaptive sealing device according to claim 1, characterized in that, The fish scale plate (11) is installed on the upper base (10) in an inclined position, and its installation angle is 15°-30°.

5. The fish-scale plate type adaptive sealing device according to claim 4, characterized in that, The inclined installation direction of the fish scale plate (11) is adapted to the spray water flow direction in the pretreatment chamber, so as to use the pushing pressure of the spray water flow to press the fish scale plate (11) together.

6. The fish-scale plate type adaptive sealing device according to claim 1, characterized in that, It also includes a fastening assembly (3), the double-layer composite fish scale plate sealing structure (1) is modularly installed on the upper base (10) through the fastening assembly (3), the fastening assembly (3) includes an inclined mounting plate (30), and a number of welded studs (31) are evenly distributed on the inclined mounting plate (30); the upper ends of the fish scale plate (11) and the fluororubber plate (12) are provided with mutually aligned mounting holes and are fitted together on the corresponding welded studs (31), and are threadedly locked by a large washer (32) and a cap nut (33).

7. The fish-scale plate type adaptive sealing device according to claim 1, characterized in that, The overlap width between two adjacent double-layer composite fish scale plate sealing structures (1) is 100mm, and the cutting width of a single double-layer composite fish scale plate sealing structure (1) is 300mm.

8. The fish-scale plate type adaptive sealing device according to claim 1, characterized in that, The double-layer composite fish scale plate sealing structure (1) near the entrance of the conveying channel has a slanted rolled edge (13) on the edge facing the side of the hanger entering along the direction of the hanger cutting in, and the slanted rolled edge (13) has a smooth transition rounded chamfer at the intersection of the hanging bottom edge of the double-layer composite fish scale plate sealing structure (1).

9. A fish-scale plate type adaptive sealing device according to claim 8, characterized in that, The inclination angle of the oblique rolled edge (13) is 77°, and the radius of the smooth transition rounded chamfer is 30mm.

10. A fish-scale plate type adaptive sealing device according to claim 1, characterized in that, The receiving sealing layer (22) is a fluororubber layer; the fluororubber layer is fixed to the inclined surface of the support plate (21) by a plurality of pop rivets.

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