Bolt moisture-proof protective cover

Abstract

The utility model discloses a bolt moisture-proof protective cover which is used for protecting a bolt and a nut and comprises a primary shell and a secondary shell. A first elastic cushion block is arranged on the inner side of the primary shell, the secondary shell and the primary shell are symmetrically arranged on the two sides of a bolt center shaft and hinged through a pin shaft, and the free sides of the secondary shell and the primary shell are connected through a buckle. A second elastic cushion block matched with the first elastic cushion block is arranged on the inner side of the sub-shell; the middle of the first elastic cushion block and the middle of the second elastic cushion block are hollowed to form a stepped containing cavity. The primary shell and the secondary shell are clamped so that the first elastic cushion block and the second elastic cushion block can wrap the bolt in the containing cavity. According to the protective cover, rapid opening and closing are achieved through the hinged buckle design of the primary shell and the secondary shell, and the stepped containing cavity formed by the double elastic cushion blocks is combined, so that the sealing performance is improved, and the protective cover is suitable for various bolt specifications. The elastic cushion layer tightly wraps the screw head to isolate moisture permeation, and the step structure facilitates flow guide of condensate water and avoids accumulation.

Description

Technical Field

[0001] This application relates to the field of hydropower station technology, and more specifically, to a moisture-proof protective cover for bolts. Background Technology

[0002] In outdoor equipment, bridge engineering, and power facilities, bolts, as critical connecting components, are exposed to corrosive environments such as humidity and salt spray for extended periods. Existing moisture-proof measures mostly employ protective paint coatings, which have significant drawbacks: the coatings are susceptible to mechanical wear and UV aging, resulting in short protection cycles and high maintenance costs. Especially under harsh operating conditions such as hydropower stations and coastal facilities, existing technologies cannot simultaneously meet the requirements of long-term moisture protection, convenient maintenance, and adaptability. There is an urgent need to develop new protective structures to overcome these technical bottlenecks. Utility Model Content

[0003] This application provides a moisture-proof protective cover for bolts and nuts, comprising a mother shell and a daughter shell. A first elastic pad is provided on the inner side of the mother shell. The daughter shell is symmetrically arranged on both sides of the bolt's central axis and hinged to it by a pin. The free side of the daughter shell is connected to the mother shell by a snap-fit ​​connection. A second elastic pad, which mates with the first elastic pad, is provided on the inner side of the daughter shell. A stepped receiving cavity is formed between the first and second elastic pads. The mother shell and the daughter shell are clamped together so that the first and second elastic pads enclose the bolt within the receiving cavity.

[0004] In some embodiments, both the inner surfaces of the bottom ends of the mother shell and the daughter shell are provided with protruding rings. The protruding rings are used to press the bottom ends of the first elastic pad and the second elastic pad toward the chamfer of the nut when the bottom ends of the mother shell and the daughter shell are clamped together, so as to strengthen the clamping of the nut by the protective cover.

[0005] In some embodiments, the free ends of the mother shell and the daughter shell are respectively provided with interlocking latching parts and slots, and the latching parts are embedded in the corresponding slots to achieve locking.

[0006] In some embodiments, the connection between the first elastic pad and the second elastic pad is provided with mutually cooperating stepped bosses.

[0007] In some embodiments, the protective cover further includes a cap disposed at the upper end of the mother shell and the daughter shell, and the protective cover is detachably mounted on the upper end of the mother shell and the daughter shell.

[0008] In some embodiments, the inner upper sides of the mother shell and the daughter shell protrude inward to form a retaining ring, the lower end of the cap protrudes to form a connecting post, and the outer side of the connecting post has an annular groove corresponding to the retaining ring. The retaining ring is embedded in the annular groove to fix the cap.

[0009] In some embodiments, the upper end of the cap is tapered to prevent water accumulation.

[0010] In some embodiments, both the mother shell and the daughter shell are embedded with magnetic strips.

[0011] In some embodiments, the mother shell and the daughter shell extend outward at the junction to form a mounting plate, the magnet is located inside the mounting plate, and when the mother shell and the daughter shell are clamped together, the surfaces of the two mounting plates of the mother shell and the daughter shell can form a plane.

[0012] In some embodiments, the lower cavity of the receiving cavity has a hexagonal cross-section for covering the nut; the upper cavity of the receiving cavity has a circular cross-section for wrapping the bolt; and the corners of the hexagonal lower cavity of the receiving cavity are located at the clamping point between the first elastic pad and the second elastic pad.

[0013] The protective cover of this application achieves quick opening and closing through a hinged snap-fit ​​design between the female and female shells. Combined with a stepped receiving cavity formed by double elastic pads, it improves sealing performance and is compatible with various bolt sizes. The elastic pads tightly wrap around the bolt head, preventing moisture penetration, while the stepped structure facilitates condensation drainage and prevents accumulation. The split shell design balances ease of installation with structural stability, significantly extending the bolt's moisture protection period and reducing maintenance frequency, making it particularly suitable for harsh environments such as high humidity and salt spray corrosion.

[0014] Additional aspects and advantages of embodiments of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of embodiments of this application. Attached Figure Description

[0015] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, wherein:

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0017] Figure 2 This is an exploded view of the overall structure of an embodiment of this application;

[0018] Figure 3 yes Figure 1 A schematic diagram of the cross-sectional structure of the centerline AA;

[0019] Figure 4 yes Figure 1 A schematic diagram of the cross-sectional structure of the centerline BB.

[0020] Explanation of main component symbols: Protective cover 100, mother shell 10, first elastic pad 11, convex ring 12, boss 13, daughter shell 20, second elastic pad 21, pin 22, receiving cavity 30, snap fastener 40, snap groove 50, cap 60, connecting post 61, snap ring 14, annular groove 62, magnetic strip 70, mounting plate 80. Detailed Implementation

[0021] The embodiments of this application will be further described below with reference to the accompanying drawings. The same or similar reference numerals in the drawings denote the same or similar elements or elements having the same or similar functions throughout.

[0022] Furthermore, the embodiments of this application described below in conjunction with the accompanying drawings are exemplary and are only used to explain the embodiments of this application, and should not be construed as limiting this application.

[0023] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0024] Please see Figure 1 and Figure 2 This application provides a bolt moisture-proof protective cover 100 for protecting bolts and nuts. The protective cover 100 includes a mother shell 10 and a daughter shell 20. A first elastic pad 11 is provided on the inner side of the mother shell 10. The daughter shell 20 is symmetrically arranged on both sides of the bolt's central axis and hinged to it by a pin 22. The free side of the daughter shell 20 is connected to the mother shell 10 by a snap-fit. A second elastic pad 21 that cooperates with the first elastic pad 11 is provided on the inner side of the daughter shell 20. A stepped receiving cavity 30 is formed by hollowing out the middle of the first elastic pad 11 and the second elastic pad 21. The mother shell 10 and the daughter shell 20 are clamped together so that the first elastic pad 11 and the second elastic pad 21 enclose the bolt and nut in the receiving cavity 30.

[0025] The protective cover 100 of this application achieves quick opening and closing through a hinged snap-fit ​​design between the mother shell 10 and the daughter shell 20. Combined with the stepped receiving cavity 30 formed by double elastic pads, it not only improves sealing performance but also adapts to various bolt sizes. The elastic pad tightly wraps around the nut, preventing moisture penetration, while the stepped structure facilitates condensate drainage and avoids accumulation. The split shell design balances ease of installation with structural stability, significantly extending the bolt's moisture protection period and reducing maintenance frequency, making it particularly suitable for harsh environments such as high humidity and salt spray corrosion.

[0026] Specifically, the protective cover 100 is roughly cylindrical in shape and is used to fit around the outer periphery of bolts and nuts to protect them from corrosion by environments such as high humidity and salt spray. The protective cover 100 is roughly divided in half along its axial direction to form a mother shell 10 and a daughter shell 20. The mother shell 10 and the daughter shell 20 are symmetrically arranged on both sides of the bolt. One of their free sides is hinged together by a pin 22 to achieve opening and closing, while the other free side is locked together by a snap-fit ​​mechanism.

[0027] The inner sides of the mother shell 10 and the daughter shell 20 are respectively provided with elastic pads (i.e., the first elastic pad 11 and the second elastic pad 21), which are fixed by snap-fitting, adhesive bonding, or other methods. A receiving cavity 30 is formed at the junction of the two elastic pads. The lower cavity of the receiving cavity 30 has a hexagonal cross-section for covering the nut; the upper cavity of the receiving cavity 30 has a circular cross-section for wrapping the bolt. The two elastic pads symmetrically wrap around both sides of the bolt and the nut. The corners of the hexagonal lower cavity of the receiving cavity 30 are located at the junction of the first elastic pad 11 and the second elastic pad 21. The elastic pads are made of elastic materials such as rubber and silicone.

[0028] Furthermore, to strengthen the fixation of the protective cover 100 to the bolts and nuts, both the inner surfaces of the bottom ends of the mother shell 10 and the daughter shell 20 are provided with protruding rings 12. The protruding rings 12 are used to press the bottom ends of the first elastic pad 11 and the second elastic pad 21 towards the chamfer of the nut when the bottom ends of the mother shell 10 and the daughter shell 20 are clamped together, thereby reinforcing the clamping of the nut by the protective cover 100. The protruding rings 12 are wedge-shaped or arc-shaped, with a height of 0.5~1.5mm and an inclination angle of 5°~15°, matching the chamfer curvature of the nut. When the mother shell 10 and the daughter shell 20 are closed by snap-fit, the protruding rings 12 press against the bottom of the elastic pads, forcing the pads to deform towards the chamfer of the nut, so that the bottom surface of the pads forms surface contact with the chamfer.

[0029] Furthermore, the free ends of the mother shell 10 and the daughter shell 20 are respectively provided with interlocking latching parts 40 and locking grooves 50, with the latching parts 40 engaging with the corresponding locking grooves 50 to achieve locking. Specifically, the latching parts 40 and locking grooves 50 are formed from the outer surface inward on the outer side of the free end of the mother shell 10. Along the outer periphery of the free end of the mother shell 10 towards the hinge end, the latching parts 40 are at the outer end, and the locking grooves 50 are at the inner end. The layout of the latching parts 40 and locking grooves 50 of the daughter shell 20 is mirror-symmetrical to that of the mother shell 10. During assembly, the latching parts 40 of the mother shell 10 engage with the locking grooves 50 of the daughter shell 20, and simultaneously the latching parts 40 of the daughter shell 20 engage with the locking grooves 50 of the mother shell 10, forming a bidirectional interlock.

[0030] Furthermore, the connection between the first elastic pad 11 and the second elastic pad 21 is provided with mutually cooperating stepped protrusions 13. Specifically, the height of the protrusions 13 is 1 / 3 to 1 / 2 of the thickness of the pad. The protrusions 13 of the two pads are nested in an alternating manner to form a stepped sealing structure. The stepped seal can effectively block the water vapor penetration path, which is especially suitable for outdoor humid environments.

[0031] Furthermore, the protective cover 100 also includes a cap 60, which is disposed at the upper end of the mother shell 10 and the daughter shell 20. The protective cover 100 is detachably installed at the upper end of the mother shell 10 and the daughter shell 20. Specifically, the inner side of the upper end of the mother shell 10 and the daughter shell 20 protrudes inward to form a retaining ring 14, and the lower end of the cap 60 protrudes to form a connecting post 61. The outer side of the connecting post 61 has an annular groove 62 corresponding to the retaining ring 14. The retaining ring 14 is inserted into the annular groove 62 to fix the cap 60. During assembly, the retaining ring 14 is inserted into the annular groove 62, and the retaining is achieved by elastic deformation. The interference fit between the retaining ring 14 and the annular groove 62 provides axial locking force to prevent the cap 60 from falling off due to external force. The upper end of the cap 60 is set in a conical shape to prevent water accumulation, with a cone angle of 15°~25°. The conical curved surface accelerates the sliding of rainwater and prevents water accumulation at the top.

[0032] Furthermore, both the mother shell 10 and the daughter shell 20 are embedded with magnetic strips 70. Specifically, the magnetic strips 70 are made of flexible neodymium iron boron material, and the surface of the magnetic strips 70 is covered with an insulating layer. The magnetic strips 70 are arranged along the length of the shell. In the embodiment of this application, the magnet is located near the hinge position of the mother shell 10 and the daughter shell 20, and the mother shell 10 and the daughter shell 20 extend outward at the hinge position to form a mounting plate 80. When the mother shell 10 and the daughter shell 20 are clamped, the outer surfaces of the two mounting plates 80 can form a plane. When the nut is unscrewed, the nut is placed back into the protective cover 100 and locked. The magnetic strips 70 and the mounting plates 80 magnetically attract the protective cover 100 and the nut to the iron part near the bolt, preventing the nut from falling off and increasing the workload.

[0033] In the description of this specification, the references to "certain embodiments," "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples" refer to specific features, structures, materials, or characteristics described in connection with the described embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the stated features. In the description of this application, "multiple" means at least two, such as two or three, unless otherwise explicitly specified.

[0035] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A moisture-proof protective cover for bolts, used to protect bolts and nuts, characterized in that, include: The mother shell has a first elastic pad on its inner side; The sub-shell is symmetrically arranged on both sides of the central axis of the bolt and hinged by a pin. The free side of the sub-shell is connected to the free side of the mother shell by a snap fastener. The inner side of the sub-shell is provided with a second elastic pad that cooperates with the first elastic pad. A stepped receiving cavity is formed by hollowing out the middle of the first elastic pad and the second elastic pad. The mother shell and the sub-shell are clamped together so that the first elastic pad and the second elastic pad wrap the bolt in the receiving cavity.

2. The protective cover according to claim 1, characterized in that, Both the inner surfaces of the bottom ends of the mother shell and the daughter shell are provided with protruding rings. The protruding rings are used to press the bottom ends of the first elastic pad and the second elastic pad towards the chamfer of the nut when the bottom ends of the mother shell and the daughter shell are clamped together, so as to strengthen the clamping of the nut by the protective cover.

3. The protective cover according to claim 1, characterized in that, The free ends of the mother shell and the daughter shell are respectively provided with interlocking buckle parts and slots, and the buckle parts are embedded in the corresponding slots to achieve locking.

4. The protective cover according to claim 1, characterized in that, The first elastic pad and the second elastic pad are provided with mutually cooperating stepped bosses at the connection point.

5. The protective cover according to claim 1, characterized in that, The protective cover also includes a cap, which is disposed at the upper end of the mother shell and the daughter shell, and the protective cover is detachably installed at the upper end of the mother shell and the daughter shell.

6. The protective cover according to claim 5, characterized in that, The inner upper sides of the mother shell and the daughter shell protrude inward to form a retaining ring, and the lower end of the cap protrudes to form a connecting post. The outer side of the connecting post has an annular groove corresponding to the retaining ring, and the retaining ring is embedded in the annular groove to fix the cap.

7. The protective cover according to claim 5, characterized in that, The upper end of the cap is tapered to prevent water accumulation.

8. The protective cover according to claim 1, characterized in that, Both the mother shell and the daughter shell have embedded magnetic strips.

9. The protective cover according to claim 8, characterized in that, The mother shell and the daughter shell extend outward at the junction to form a mounting plate. The magnetic strip is located inside the mounting plate. When the mother shell and the daughter shell are clamped together, the two mounting plates of the mother shell and the daughter shell can form a plane.

10. The protective cover according to claim 1, characterized in that, The lower cavity of the receiving cavity has a hexagonal cross-section for covering the nut; the upper cavity of the receiving cavity has a circular cross-section for wrapping the bolt; the corners of the hexagonal lower cavity are located at the junction of the first elastic pad and the second elastic pad.

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