Anti-corrosion bolt

Abstract

The utility model discloses an anti-corrosion bolt which comprises a screw rod and a screw cap, the outer peripheral side wall of the screw rod and the inner peripheral side wall of the screw cap are provided with thread grooves matched with each other, and the screw rod is installed on an installation plate by being matched with the screw cap in a threaded mode. The protective sleeve is used for protecting the screw rod and the exposed part which are mounted on the mounting plate, the protective sleeve is filled with an anti-rust material, and the protective sleeve is detachably mounted on the screw rod and the screw cap. By arranging the protective sleeve, the second ring body can slide downwards according to the length of the exposed part, so that the second ring body is in contact with the surface of the mounting plate, thereby adapting to different exposed lengths after the bolt is mounted, and further reducing the customization cost to a certain extent; through the arrangement of the expansion pipe, when the anti-rust material in the second ring body flows down, the anti-rust material flows into the first bent part along the inner walls of the second ring body and the expansion pipe, the anti-rust material is always located in the protection sleeve, the second bent part can be better attached to the screw rod, and therefore the situation that the anti-rust material flows out and influences the surroundings is further prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of bolts, in particular to an anti-corrosion bolt. Background Art

[0002] Bolts are a type of fastener widely used in various industrial and construction fields. Depending on the environment and scenarios in which they are installed, the corrosion resistance of bolts has received different levels of attention. In order to cope with various corrosive environments, bolts are usually made of materials with corrosion resistance. After the bolts are installed, in order to further protect the exposed parts of the bolts from erosion by the external environment, protective sleeves are usually installed on these parts and coated with a layer of rust-proof material to ensure the long-term stability and reliability of the bolts.

[0003] However, the protection method of the protective cover is mostly to apply anti-rust material on the inner layer and to use a customized protective cover for protection on the outside. The anti-rust material applied on the inner layer is mostly grease. When the temperature is high, the grease melts and flows out of the nut cover, causing pollution and corrosion of the surrounding paint. Moreover, the protective cover with the nut also needs to be customized according to the on-site specifications and sizes. For example, the exposed part of the bolt after installation has different lengths, and a protective cover of corresponding size is required, which undoubtedly increases the cost. Therefore, an anti-rust bolt is proposed to solve the above problems. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and provides an anti-corrosion bolt.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solution: a rust-proof bolt, comprising a screw and a nut, wherein the outer peripheral side wall of the screw and the inner peripheral side wall of the nut are provided with matching thread grooves, and the screw is mounted on the mounting plate by cooperating with the nut thread; and further comprising a protective sleeve for protecting the screw and the exposed part mounted on the mounting plate, the protective sleeve being filled with rust-proof material, and the protective sleeve being detachably mounted on the screw and the nut.

[0006] As a further description of the above technical solution:

[0007] The protective sleeve includes a first cap and a second ring body, the first cap and the second ring body are slidably matched, the first cap is located above the second ring body, and the size of the first cap is larger than the size of the second ring body, and the bottom end of the second ring body is fixedly connected to an outer retaining ring body, and the outer retaining ring body gradually tilts outward.

[0008] As a further description of the above technical solution:

[0009] The bottom end of the first cap is bent inward to form a first rib, and the second ring is bent inward to form a second rib. The screw and the second ring are limitedly slid by the cooperation of the first rib and the second rib.

[0010] As a further description of the above technical solution:

[0011] The top end of the second rib is tilted downward to form an inclined surface structure, and the tilting direction is toward the center of the second ring body.

[0012] As a further description of the above technical solution:

[0013] A detachable expansion tube is installed in the second ring body, and the bottom end of the expansion tube is fixedly connected to an integrated first curved portion and a second curved portion, and the end of the second curved portion away from the first curved portion is fixedly connected to a contact portion, and the contact portion is in contact with the top wall of the mounting plate.

[0014] As a further description of the above technical solution:

[0015] A plurality of axially arranged annular sheets are fixedly connected to the inner peripheral side wall of the first curved portion, and the plurality of annular sheets are inserted into the thread grooves on the nut.

[0016] As a further description of the above technical solution:

[0017] The top end of the expansion tube is fixedly connected to an annular protrusion, and the inner peripheral side surface of the second ring body is provided with an annular installation groove that matches the size of the annular protrusion. The expansion tube is fixed in the annular installation groove through the annular protrusion.

[0018] The utility model has the following beneficial effects:

[0019] 1. Compared with the existing technology, this anti-corrosion bolt, by providing a protective sleeve, can slide the second ring body downward according to the length of the exposed part, so that the second ring body contacts the surface of the mounting plate, thereby adapting to different exposed lengths of the bolt after installation, thereby reducing customization costs to a certain extent.

[0020] 2. Compared with the existing technology, this anti-corrosion bolt has an expansion tube. When the anti-rust material in the second ring body flows down, the anti-rust material flows into the first curved portion along the inner wall of the second ring body and the expansion tube, so that it is always in the protective sleeve, and several annular pieces on the elastic material expansion tube are inserted into the thread groove on the nut, so that the second curved portion can better fit the screw, thereby further preventing the anti-rust material from flowing out and affecting the surrounding area. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the screw structure of an anti-corrosion bolt proposed in the utility model;

[0022] Figure 2 This is a cross-sectional schematic diagram of an anti-corrosion bolt in an installed state proposed by the utility model;

[0023] Figure 3 This is a three-dimensional schematic diagram of the installation state of an anti-corrosion bolt proposed by the utility model;

[0024] Figure 4 for Figure 1 A in the middle is an enlarged structural diagram;

[0025] Figure 5 This is a cross-sectional schematic diagram of a protective sleeve for an anti-corrosion bolt proposed in the utility model;

[0026] Figure 6 for Figure 5 The enlarged structural diagram at B in the middle;

[0027] Figure 7 for Figure 5 Enlarged structural diagram at point C in the middle.

[0028] Legend:

[0029] 1. Screw; 2. Nut; 3. Protective sleeve; 4. Mounting plate; 5. First cap; 6. Second ring body; 7. Expansion tube; 8. Outer retaining ring body; 9. First curved portion; 10. Second curved portion; 11. Annular piece; 12. Contact portion; 13. Inclined surface structure; 14. Annular mounting groove; 15. Annular protrusion; 16. First rib; 17. Second rib; 18. Threaded groove. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] Reference Figure 1-7 The utility model provides an anti-corrosion bolt: it includes a screw 1 and a nut 2, the outer side wall of the screw 1 and the inner side wall of the nut 2 are provided with matching thread grooves 18, and the screw 1 is installed on the mounting plate 4 by cooperating with the nut thread; it also includes a protective sleeve 3 for protecting the exposed parts of the screws 1 and 2 installed on the mounting plate 4, the protective sleeve 3 is filled with anti-rust material, and the protective sleeve 3 can be detachably installed on the screw 1 and the nut 2.

[0032] The protective sleeve 3 includes a first cap 5 and a second ring body 6, which are slidably matched. The first cap 5 is located above the second ring body 6, and the size of the first cap 5 is larger than the size of the second ring body 6. The bottom end of the second ring body 6 is fixedly connected to an outer retaining ring body 8, and the outer retaining ring body 8 gradually tilts outward. The bottom end of the first cap 5 is bent inward to form a first rib 16, and the second ring body 6 is bent inward to form a second rib 17. The screws 1 and 2 are limited and slid by the cooperation of the first rib 16 and the second rib 17. By setting the first cap 5 and the second ring body 6 that are slidably matched, and the second ring body 6 sliding inside the first cap 5, when in use, the first cap 5 is put on the exposed part of the screw 1 and the nut 2, and the second ring body 6 is slid downward according to the length of the exposed part until the second ring body 6 contacts the surface of the mounting plate 4, thereby adapting to different exposed lengths after the bolts are installed, thereby reducing the customization cost to a certain extent.

[0033] The top of the second rib 17 is tilted downward to form a slope structure 13 , and the tilting direction is toward the center of the second ring body 6 . By setting the slope structure 13 at the top of the second rib 17 , the melted screw anti-rust material is guided to flow into the second ring body 6 through the slope structure 13 .

[0034] A detachable expansion tube 7 is installed in the second ring body 6, and the bottom end of the expansion tube 7 is fixedly connected with an integrated first bend 9 and a second bend 10. The end of the second bend 10 away from the first bend 9 is fixedly connected with a contact portion 12, and the contact portion 12 fits the top wall of the mounting plate 4. By setting the first bend 9 and the second bend 10, the first bend 9 is formed to bend downward and the second bend 10 is shaped to bend inward. In this way, when the rust-proof material in the second ring body 6 flows down, the rust-proof material flows into the first bend 9 along the inner wall of the second ring body 6 and the expansion tube 7, so that it is always in the protective sleeve 3. Moreover, since the expansion tube 7, the first bend 9 and the second bend 10 are all made of an integral rubber material, and the inner peripheral side wall of the first bend 9 is fixedly connected with a number of axially arranged annular sheets 11, and the number of annular sheets 11 are inserted into the thread groove 18 on the nut, the second bend 10 can better fit the screw 1, thereby further preventing the rust-proof material from flowing out and affecting the surrounding area.

[0035] An annular protrusion 15 is fixedly connected to the top of the expansion tube 7, and an annular mounting groove 14 that matches the size of the annular protrusion 15 is opened on the inner side surface of the second ring body 6. The expansion tube 7 is clamped in the annular mounting groove 14 through the annular protrusion 15. By setting the annular protrusion 15 and the annular mounting groove 14, the expansion tube 7 is pressed to deform it, and the expansion tube 7 can be taken out. During installation, the expansion tube 7 is pressed to deform and compress it, and the expansion tube 7 is inserted into the second ring body 6 and then released. At this time, the compressed expansion tube 7 is reset and expanded, and then the position of the expansion tube 7 is adjusted so that the annular protrusion 15 slides into the annular mounting groove 14.

[0036] Working principle: When installing the expansion tube 7 and the protective sleeve 3, first apply pressure to the expansion tube 7 to deform and compress it. Then, insert the compressed expansion tube 7 into the interior of the second ring body 6. Once the expansion tube 7 is released, it will automatically return to its original shape and expand. Next, fine-tune the expansion tube 7 to ensure that the annular protrusion 15 can slide smoothly into the annular mounting groove 14, thereby ensuring the correct installation of the expansion tube 7.

[0037] The installation steps of the protective cover 3 are as follows: first, fix the screw 1 and the nut 2 on the mounting plate 4 according to actual needs, then put the first cap 5 on the exposed parts of the screw 1 and the nut 2, and then, according to the length of the exposed parts of the screw 1 and the nut 2, slide the second ring body 6 downward until the lower end face of the second ring body 6 is tightly fitted with the surface of the mounting plate 4, and the interface is installed.

[0038] During installation, the inner wall of the second curved portion 10 fits tightly against the thread groove 18 of the screw 1, ensuring a secure fixation. Simultaneously, the contact portion 12 and the outer retaining ring 8 also contact the surface of the mounting plate 4. This design not only ensures structural stability but also effectively prevents accidental leakage of the internal rust-proofing material, thereby ensuring the safety and reliability of the entire device.

[0039] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A rust-proof bolt comprising a screw rod (1) and a nut (2), characterized in that: The outer peripheral side wall of the screw (1) and the inner peripheral side wall of the nut (2) are provided with matching thread grooves (18), and the screw (1) is mounted on the mounting plate (4) by cooperating with the nut thread; and further comprising a protective sleeve (3) for protecting the exposed parts of the screw (1) and the (2) mounted on the mounting plate (4), wherein the protective sleeve (3) is filled with rust-proof material and the protective sleeve (3) is detachably mounted on the screw (1) and the nut (2).

2. The anti-corrosion bolt according to claim 1, characterized in that: The protective sleeve (3) comprises a first cap (5) and a second ring body (6), wherein the first cap (5) and the second ring body (6) are slidably matched, the first cap (5) is located above the second ring body (6), and the size of the first cap (5) is larger than the size of the second ring body (6), and the bottom end of the second ring body (6) is fixedly connected to an outer retaining ring body (8), and the outer retaining ring body (8) is gradually tilted outward.

3. The anti-corrosion bolt according to claim 2, characterized in that: The bottom end of the first cap (5) is bent inward to form a first rib (16), and the second ring body (6) is bent inward to form a second rib (17). The screw (1) and the (2) are limitedly slid by the cooperation of the first rib (16) and the second rib (17).

4. The anti-corrosion bolt according to claim 3, characterized in that: The top end of the second retaining edge (17) is tilted downward to form an inclined surface structure (13), and the tilting direction is toward the center of the second ring body (6).

5. The anti-corrosion bolt according to claim 3, characterized in that: A detachable expansion tube (7) is installed in the second ring body (6), and the bottom end of the expansion tube (7) is fixedly connected to an integral first curved portion (9) and a second curved portion (10), and an end of the second curved portion (10) away from the first curved portion (9) is fixedly connected to a contact portion (12), and the contact portion (12) is in contact with the top wall of the mounting plate (4).

6. The anti-corrosion bolt according to claim 5, characterized in that: A plurality of axially arranged annular sheets (11) are fixedly connected to the inner peripheral side wall of the first curved portion (9), and the plurality of annular sheets (11) are inserted into the thread groove (18) on the nut.

7. The anti-corrosion bolt according to claim 6, characterized in that: The top end of the expansion tube (7) is fixedly connected to an annular protrusion (15), and the inner circumferential side surface of the second ring body (6) is provided with an annular mounting groove (14) that matches the size of the annular protrusion (15), and the expansion tube (7) is fixed in the annular mounting groove (14) through the annular protrusion (15).

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