High-strength anti-loose freezing connector structure and super-hydrophobic surface manufacturing method thereof

Abstract

The invention relates to a high-strength anti-loosening freezing connector structure and a super-hydrophobic surface manufacturing method thereof. The high-strength anti-loosening freezing connector structure comprises a fixing body, a steel rail is arranged on one side of the fixing body, gaskets are arranged on the two sides of the steel rail, first bolts are arranged on the gaskets, and anti-following-rotation gaskets are arranged between the first bolts and the gaskets. A nut and a nut locking nut are further arranged between the first bolt and the gasket, a cotter pin is arranged on the nut locking nut, and the nut and the follow-up rotation preventing gasket are arranged at the two ends of the first bolt respectively. The technical problems that in the prior art, due to nut loosening, fastening force of the freezing connector is attenuated, the bolt rotates along with the nut, and the mounting quality and the service life are affected by icing on the surface of the connector are solved.

Description

Technical Field

[0001] The invention belongs to the field of joints, and in particular relates to a high-strength anti-loosening and freezing joint structure and a method for manufacturing a super-hydrophobic surface thereof. Background Art

[0002] In the prior art, the freezing joint of the rail joint plays the role of connecting and fastening the rails in the railway system. However, the existing freezing joint has many problems in practical application.

[0003] First, under high-frequency vibration conditions, the tightening force of the frozen joint will be weakened due to the loosening of the nut. This situation requires regular manual re-tightening of the joint to maintain its tightening force. This maintenance method not only increases the workload and cost of maintenance, but also requires a large amount of human resources during the maintenance process, reducing the maintenance efficiency of the railway system.

[0004] Secondly, when tightening bolts, the bolt often rotates with the nut. Bolt rotation means that when the nut is rotated, the bolt also rotates, making it impossible to achieve effective tightening. In this case, two operators are required to control the two ends of the bolt respectively to complete the operation. This not only increases the complexity of the operation, but also greatly increases the labor intensity of the operators, affecting work efficiency.

[0005] In addition, during the installation of freezing joints, due to the influence of environmental conditions, their surfaces often freeze. This situation will further affect the installation quality and service life of freezing joints. Ice coating will not only make installation difficult, but also accelerate the aging and wear of equipment during long-term use, ultimately affecting the stability and safety of the railway system. Summary of the invention

[0006] In order to solve the above problems, the design of nut anti-loosening cap and super-hydrophobic surface can improve the fastening force of the joint, simplify the operation process, reduce labor intensity, and improve the durability and service life of the joint under harsh environmental conditions.

[0007] The technical solution adopted by the present invention is as follows: The present invention provides a high-strength anti-loosening freezing joint structure, including a fixed body, a steel rail is installed on one side of the fixed body, gaskets are installed on both sides of the steel rails, a first bolt is installed on the gasket, an anti-rotation washer is installed between the first bolt and the gasket, a nut and a nut anti-loosening cap are also installed between the first bolt and the gasket, a cotter pin is installed on the nut anti-loosening cap, and the nut and the anti-rotation washer are respectively arranged at both ends of the first bolt.

[0008] Furthermore, the nut anti-loosening cap includes a nut body mounted on the first bolt, and a first mounting hole is penetrated through the nut body.

[0009] Furthermore, the gasket includes a gasket body mounted on the rail, a plurality of second mounting holes are penetrated through the gasket body, and a super-hydrophobic surface is mounted on one side of the second mounting holes.

[0010] Furthermore, the cotter pin comprises a pin column installed in the first mounting hole, and a connecting ring is installed at one end of the pin column.

[0011] The present invention also provides a method for manufacturing a super-hydrophobic surface of a high-strength anti-loosening and freezing joint. The method is used for the above-mentioned high-strength anti-loosening and freezing joint structure, and comprises the following steps: a first step of pre-treating the surface of the gasket; a second step of processing the micro-texture of the gasket surface according to the following formula, and performing pre-design:

[0012] cosθ= r(γ sv -c 1s ) = r·cosθ

[0013] γ 1v

[0014] Where θ is the apparent contact angle, r is the roughness factor, γ sv is the surface tension between the solid and gas interfaces, γ 1s is the surface tension between the liquid and solid interface, γ 1v is the surface tension at the liquid-gas interface.

[0015] Design parameters include spacing B, diameter D and depth D.

[0016] Furthermore, the pretreatment of the gasket surface includes cleaning the gasket surface with deionized water.

[0017] Furthermore, the spacing B has a value range of 100 μm-200 μm, the diameter D has a value range of 100 μm-150 μm, and the depth D has a value range of 150 μm-250 μm.

[0018] The beneficial effects achieved by the present invention are as follows:

[0019] Based on the above technical solution, the present invention provides a high-strength anti-loosening and anti-freezing joint structure, which ensures the anti-loosening and anti-freezing performance of the joint under high-strength conditions by using a fixed body, a gasket, a first bolt, an anti-rotation washer, a nut, and a nut anti-loosening cap. By arranging a cotter pin on the nut anti-loosening cap, the anti-loosening performance of the joint is further improved, effectively solving the problem in the prior art that the joint is easy to loosen when used for a long time or subjected to vibration.

[0020] In addition, the present invention designs multiple mounting holes on the gasket body, and provides a super-hydrophobic surface on one side of the mounting hole, using the characteristics of the super-hydrophobic surface to prevent moisture from gathering or penetrating on the joint surface. This design significantly improves the anti-freezing performance of the joint, and is particularly suitable for applications in cold environments, effectively avoiding functional failure or damage to the joint due to freezing.

[0021] The present invention also proposes a method for making a super-hydrophobic surface of a high-strength anti-loosening and anti-freezing joint, which forms a super-hydrophobic surface by pre-treating the surface of the gasket and processing the micro-texture, thereby significantly improving the waterproof and anti-freezing performance of the joint without adding additional components. The method is simple to operate, easy to implement, suitable for large-scale production, and helps to reduce production costs and improve the market competitiveness of products. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A structural diagram of a high-strength anti-loosening and freezing joint structure proposed by the present invention;

[0023] Figure 2 This is a main structural diagram of the split pin proposed by the present invention;

[0024] Figure 3 This is a main structural diagram of the nut anti-loosening cap proposed by the present invention;

[0025] Figure 4 This is a main structural diagram of the gasket proposed by the present invention;

[0026] Figure 5 This is a main structural diagram of the anti-heel rotation washer proposed by the present invention;

[0027] Figure 6 This is a diagram of the super hydrophobic surface structure proposed by the present invention;

[0028] Among them, 1. fixed body, 2. rail, 3. gasket, 301. gasket body, 302. second mounting hole, 303. super hydrophobic surface, 4. anti-rotation washer, 401. washer body, 402. block, 5. bolt, 6. nut, 7. nut anti-loosening cap, 701. nut body, 702. first mounting hole, 8. cotter pin, 801. connecting ring, 802. pin.

[0029] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be understood that terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside” and “outside” indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0032] Example:

[0033] See also Figure 1-Figure 5 The present invention provides a high-strength anti-loosening freezing joint structure, comprising a fixed body 1, a steel rail 2 is installed on one side of the fixed body 1, gaskets 3 are installed on both sides of the steel rail 2, a first bolt 5 is installed on the gasket 3, an anti-rotation washer 4 is installed between the first bolt 5 and the gasket 3, a nut 6 and a nut anti-loosening cap 7 are also installed between the first bolt 5 and the gasket 3, a cotter pin 8 is installed on the nut anti-loosening cap 7, and the nut 6 and the anti-rotation washer 4 are respectively arranged at both ends of the first bolt 5.

[0034] In this embodiment, the first bolt 5 connects the fixed body 1 and the rail 2 through the gasket 3 and the anti-rotation washer 4. The anti-rotation washer 4 prevents the bolt 5 from rotating when the nut 6 is rotated, thereby ensuring the tightening force of the bolt 5. By using the nut anti-loosening cap 7 and the cotter pin 8, the nut 6 can be further prevented from loosening due to vibration, thereby enhancing the stability and reliability of the connection structure.

[0035] Specifically, the nut locking cap 7 includes a nut body 701 mounted on the first bolt 5 , and a first mounting hole 702 is penetrated through the nut body 701 .

[0036] The nut body 701 is fixed to the cotter pin 8 through the first mounting hole 702, further improving the anti-loosening effect of the nut 6. This design utilizes the mechanical locking function of the cotter pin 8, so that the nut 6 can remain in a tightened state even in a strong vibration environment to prevent loosening.

[0037] As a further preferred embodiment, the gasket 3 includes a gasket body 301 mounted on the rail 2 , a plurality of second mounting holes 302 are penetrated through the gasket body 301 , and a super-hydrophobic surface 303 is mounted on one side of the second mounting hole 302 .

[0038] The gasket body 301 is connected to the rail 2 through the second mounting hole 302, and the super-hydrophobic surface 303 can prevent moisture from condensing and freezing on the surface of the gasket 3, thereby improving the reliability and durability of the frozen joint in a low temperature environment.

[0039] Specifically, the cotter pin 8 includes a pin column 802 installed in the first mounting hole 702 , and a connecting ring 801 is installed at one end of the pin column 802 .

[0040] The pin 802 is fixed in the nut body 701 through the first mounting hole 702, and the connecting ring 801 is used to facilitate the insertion and fixing of the pin 802. The connecting ring 801 can also prevent the pin 802 from falling off during use, thereby ensuring the long-term stability of the cotter pin 8.

[0041] See also Figure 1-Figure 5 The anti-heel-turn washer 4 includes a washer body 401 , and a stopper 402 is mounted on the washer body 401 .

[0042] The stopper 402 is arranged on the washer body 401 and is used to cooperate with the gasket 3 or the surface of the fixed body 1 to prevent the anti-rotation washer 4 from rotating during the tightening process by mechanical engagement, thereby further improving the fixing effect of the bolt 5 and avoiding the occurrence of the bolt rotation phenomenon.

[0043] The present invention provides a method for manufacturing a super-hydrophobic surface of a high-strength anti-loosening and freezing joint, comprising the following steps:

[0044] Step 1: pre-treat the surface of gasket 3;

[0045] Step 2: Process the surface micro-texture of gasket 3 according to the following formula and perform pre-design:

[0046] cosθ= r(γ sv -c 1s ) = r·cosθ

[0047] γ 1v

[0048] Where θ is the apparent contact angle, r is the roughness factor, γ sv is the surface tension between the solid and gas interfaces, γ 1s is the surface tension between the liquid and solid interface, γ 1v is the surface tension between the liquid and air interface

[0049] See also Figure 6 Design parameters include spacing B, diameter D and depth D.

[0050] After pre-treating the surface of the gasket 3, a super-hydrophobic surface structure is formed using a micro-texture design formula. This structure reduces the adhesion of the liquid on the surface of the gasket 3 by adjusting the relationship between the roughness factor r and the apparent contact angle θ, thereby forming an efficient waterproof and anti-icing effect.

[0051] Specifically, the pretreatment of the surface of the gasket 3 includes cleaning the surface of the gasket 3 with deionized water.

[0052] Before processing the super-hydrophobic surface of the gasket 3, the surface of the gasket 3 is cleaned with deionized water to remove impurities and pollutants on the surface, thereby ensuring the quality of the super-hydrophobic surface for subsequent processing, making the surface micro-texture more uniform, and ensuring the best waterproof and anti-icing effect.

[0053] As a further preference, the spacing B is in the range of 100 μm-200 μm, the diameter D is in the range of 100 μm-150 μm, and the depth D is in the range of 150 μm-250 μm.

[0054] The morphology of the micro-texture on the surface of the gasket 3 can be optimized to achieve the best super-hydrophobic effect by adjusting the parameter range of the spacing B, diameter D and depth D. This parameter setting ensures that the water droplet forms a high contact angle on the gasket surface, thereby effectively preventing the water droplet from being retained on the surface and avoiding ice formation.

[0055] Working principle:

[0056] The joint structure solves problems such as bolt loosening, bolt rotation and surface icing in rail connections through the coordinated action of multiple components, ensuring the tightness and long-term stability of the connection.

[0057] First, the fixed body 1 and the rail 2 are tightly connected by the combination of the gasket 3, the bolt 5, the nut 6 and the anti-rotation washer 4. The anti-rotation washer 4 is designed with a stopper 402, which can effectively prevent the bolt 5 from rotating when the nut 6 is tightened, thereby maintaining the tightening force of the bolt 5. The cooperation between the nut anti-loosening cap 7 and the cotter pin 8 further prevents the nut 6 from loosening, and the joint structure can still maintain a reliable connection state even in a high-frequency vibration environment.

[0058] In addition, the super-hydrophobic surface 303 provided on the gasket 3 effectively prevents water from condensing and freezing on the surface through a specific micro-texture design. This design adjusts the spacing B, diameter D and depth D of the surface micro-texture so that water droplets form a high contact angle on the surface, reducing surface adhesion and avoiding installation difficulties and equipment aging problems caused by freezing of the joint structure in a low temperature environment.

[0059] On the whole, through reasonable design and complementary effects, each component ensures the high strength, anti-loosening and anti-icing performance of the joint structure in complex environments, effectively improving the safety and maintenance efficiency of the railway system.

[0060] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0061] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0062] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A high-strength anti-loosening and freezing joint structure, characterized in that: The invention comprises a fixed body (1), a steel rail (2) is arranged on one side of the fixed body (1), gaskets (3) are arranged on both sides of the steel rail (2), a first bolt (5) is arranged on the gasket (3), an anti-rotation washer (4) is arranged between the first bolt (5) and the gasket (3), a nut (6) and a nut anti-loosening cap (7) are also arranged between the first bolt (5) and the gasket (3), a cotter pin (8) is arranged on the nut anti-loosening cap (7), and the nut (6) and the anti-rotation washer (4) are respectively arranged at two ends of the first bolt (5).

2. A high-strength anti-loosening and anti-freezing joint structure according to claim 1, characterized in that: The nut anti-loosening cap (7) comprises a nut body (701) mounted on the first bolt (5), and a first mounting hole (702) is formed through the nut body (701).

3. A high-strength anti-loosening and anti-freezing joint structure according to claim 2, characterized in that: The gasket (3) comprises a gasket body (301) mounted on the rail (2), a plurality of second mounting holes (302) passing through the gasket body (301), and a super-hydrophobic surface (303) is mounted on one side of the second mounting holes (302).

4. The high-strength anti-loosening and anti-freezing joint structure according to claim 3 is characterized in that: The split pin (8) comprises a pin column (802) installed in the first mounting hole (702), and a connecting ring (801) is installed at one end of the pin column (802).

5. A high-strength anti-loosening and anti-freezing joint structure according to claim 4, characterized in that: The anti-heel-turn washer (4) comprises a washer body (401), and a stopper (402) is mounted on the washer body (401).

6. A method for manufacturing a super-hydrophobic surface of a high-strength anti-loosening and freezing joint according to claim 5, used for a high-strength anti-loosening and freezing joint structure according to any one of claims 1 to 5, characterized in that: The steps include: The first step: pre-treating the surface of the gasket (3); Step 2: Process the surface micro-texture of the gasket (3) and perform pre-design according to the following formula: Where θ is the apparent contact angle, r is the roughness factor, γ sv is the surface tension between the solid and gas interfaces, γ 1s is the surface tension between the liquid and solid interface, γ 1v is the surface tension at the liquid-gas interface. Design parameters include spacing B, diameter D and depth D.

7. The method for manufacturing a super-hydrophobic surface of a high-strength anti-loosening and freezing joint according to claim 6, characterized in that: The pretreatment of the surface of the gasket (3) comprises cleaning the surface of the gasket (3) with deionized water.

8. The method for manufacturing a super-hydrophobic surface of a high-strength anti-loosening and freezing joint according to claim 7, characterized in that: The spacing B has a value range of 100 μm-200 μm, the diameter D has a value range of 100 μm-150 μm, and the depth D has a value range of 150 μm-250 μm.

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