Anti-corrosion high-temperature-resistant tailless screw sleeve
By using a tailless thread insert made of iron-nickel alloy, combined with a galvanized layer and an inner ring design, the problem of unstable connection of the tailless thread insert in high temperature and humid environment is solved, achieving stable connection and corrosion resistance.
Patent Information
- Application Number
- CN202422656044.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-10-31
AI Technical Summary
Traditional tailless screw sleeves tend to loosen when connected to the inner wall of the threaded hole, resulting in an unstable connection.
The threaded sleeve body is made of iron-nickel alloy. The outer threaded ring and the outer expansion ring fit tightly against the inner wall of the threaded hole under the action of elasticity. The zinc plating layer increases the corrosion resistance, and the inner shrinkage ring design enhances the connection stability.
It achieves a stable connection between the threaded sleeve body and the inner wall of the threaded hole, preventing it from falling off and maintaining durability in high temperature and humid environments.
Smart Images
Figure CN223447442U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to tailless screw sleeve technical field, specifically is a kind of anticorrosive high-temperature tailless screw sleeve. BACKGROUND
[0002] Tailless screw sleeve is also called steel wire screw sleeve, it is a new type of threaded fastener, it is a spring-like internal and external thread concentric body that is accurately processed from high-strength, high-precision, surface-finished stainless steel wire with diamond cross section. It is an inlay developed to protect non-ferrous threaded holes. When it is screwed into and fastened in the threaded hole of one of the connected parts, it forms an internal thread that conforms to international standards, and its shape is similar to a spiral spring, with high hardness and good surface roughness.
[0003] However, the traditional tailless screw sleeve is easy to produce loosening when connected with the inner wall of the threaded hole, which leads to unstable connection of the tailless screw sleeve with the inner wall of the threaded hole. Therefore, an anticorrosive high-temperature tailless screw sleeve is provided to solve the problems raised in the above background technology. SUMMARY
[0004] The utility model aims at providing an anticorrosive high-temperature tailless screw sleeve to solve the problems raised in the above background technology.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:
[0006] An anticorrosive high-temperature tailless screw sleeve includes a screw sleeve body, which includes an outer spiral, a spiral body and an inner shrink ring. A disassembly groove is formed on the outer spiral. The outer spiral is located on the upper side of the spiral body, and the inner shrink ring is located in the middle part of the spiral body.
[0007] As a further scheme of the utility model: the screw sleeve body is made of iron-nickel alloy, and the outer layer of the iron-nickel alloy is provided with a zinc plating layer.
[0008] As a further scheme of the utility model: the disassembly groove includes a wedge surface, a smooth surface and an embedded surface.
[0009] As a further scheme of the utility model: the diameter of the inner shrink ring is three-fourths of the diameter of the spiral body.
[0010] As a further scheme of the utility model: the diameter of the spiral body is three-fourths of the diameter of the outer spiral.
[0011] As a further scheme of the utility model: the anticorrosive high-temperature tailless screw sleeve further includes an outer expansion ring, which has the same diameter as the outer spiral, and a rectangular surface is provided on the bottom side of the outer expansion ring.
[0012] Compared with the prior art, the utility model has the advantages of:
[0013] When the screw sleeve body is installed inside the threaded hole, the outer thread ring and the outer expansion ring are tightly attached to the inner wall of the threaded hole under the elastic action, so that the screw sleeve body is stably connected with the inner wall of the threaded hole, and the screw sleeve body is difficult to fall off from the threaded hole. BRIEF DESCRIPTION OF DRAWINGS
[0014] Fig. 1 It is a whole structure schematic view of the utility model;
[0015] Fig. 2 It is an outer expansion ring structure schematic view of the utility model;
[0016] Fig. 3 It is an outer thread ring structure schematic view of the utility model;
[0017] Fig. 4 It is a screw sleeve body structure sectional view schematic view of the utility model;
[0018] The corresponding relationship between the annotations of the drawings and the component names in the drawings is as follows:
[0019] 1, screw sleeve body; 101, iron-nickel alloy; 102, galvanized layer; 2, dismounting groove; 201, wedge surface; 202, smooth surface; 203, inlaid surface; 3, outer thread ring; 301, inner shrink ring; 302, thread ring body; 4, outer expansion ring. DETAILED DESCRIPTION
[0020] Please refer to Figs. 1-4 : a kind of anticorrosive high-temperature-resistant tailless screw sleeve, including screw sleeve body 1, screw sleeve body 1 includes outer thread ring 3, thread ring body 302 and inner shrink ring 301, wherein outer thread ring 3 is equipped with dismounting groove 2, outer thread ring 3 is located on the upside of thread ring body 302, and inner shrink ring 301 is located in the middle of thread ring body 302.
[0021] When the screw sleeve body 1 is installed inside the threaded hole, the outer thread ring 3 and the outer expansion ring 4 are tightly attached to the inner wall of the threaded hole under the elastic action, so that the screw sleeve body 1 is stably connected with the inner wall of the threaded hole, and the screw sleeve body 1 is difficult to fall off from the threaded hole.
[0022] Preferably, the screw sleeve body 1 is made of iron-nickel alloy 101, and the outer layer of the iron-nickel alloy 101 is provided with a galvanized layer 102.
[0023] The screw sleeve body 1 made of the iron-nickel alloy 101 has good heat resistance and can work for a long time under high temperature of 600 DEG C and certain stress, and has good high-temperature strength; the galvanized layer 102 is arranged to make the screw sleeve body 1 have good corrosion resistance, so that the iron-nickel alloy 101 can form a dense basic zinc carbonate film in a humid environment to protect the iron-nickel alloy 101 from corrosion.
[0024] Preferably, the dismounting groove 2 comprises a wedge surface 201, a smooth surface 202 and an inlaid surface 203.
[0025] The wedge surface 201 is arranged to facilitate the external dismounting member to be connected to the inside of the smooth surface 202, and then be blocked by the inlaid surface 203, so that the dismounting member can find the stress point of the screw sleeve body 1, thereby facilitating the screw sleeve body 1 to be taken out from the inside of the threaded hole.
[0026] Preferably, the inner shrink ring 301 has a diameter of three fourths of the diameter of the screw ring body 302.
[0027] The inner shrink ring 301 is arranged to make the screw sleeve body 1 be connected to the bolt more tightly, and when the bolt is inserted into the screw sleeve body 1, the diameter of the inner shrink ring 301 is expanded, so that the inner shrink ring 301 is attached to the bolt, thereby preventing the screw sleeve body 1 from being loose from the bolt.
[0028] Preferably, the screw ring body 302 has a diameter of three fourths of the diameter of the outer screw ring 3.
[0029] The outer screw ring 3 and the outer expansion ring 4 are arranged to be closely attached to the inner wall of the threaded hole, thereby making the screw sleeve body 1 be stably connected to the inner wall of the threaded hole, and making the screw sleeve body 1 difficult to be taken out from the inside of the threaded hole.
[0030] Preferably, the outer expansion ring 4 has the same diameter as the outer screw ring 3, and the bottom side of the outer expansion ring 4 is provided with a rectangular surface.
[0031] The bottom side of the outer expansion ring 4 is provided with a rectangular surface which is smoothed, thereby facilitating the screw sleeve body 1 to be connected to the inside of the threaded hole, and facilitating the screw sleeve body 1 to be installed in the threaded hole.
[0032] Working principle: when the screw body 1 is installed in the threaded hole, the outer ring 3 and the outer expansion ring 4 are tightly attached to the inner wall of the threaded hole under the elastic action, so that the screw body 1 is stably connected with the inner wall of the threaded hole, and the screw body 1 is difficult to fall off from the inside of the threaded hole. The screw body 1 made of iron-nickel alloy 101 has good heat resistance and can work for a long time under the action of high temperature of 600 DEG C and certain stress, and has good high-temperature strength. The galvanized layer 102 provided makes the screw body 1 have good corrosion resistance, so that the iron-nickel alloy 101 can form a dense basic zinc carbonate film in a humid environment, so as to protect the iron-nickel alloy 101 from corrosion. The wedge surface 201 is convenient for connecting the external dismounting member to the inside of the smooth surface 202, and then is blocked by the inlaid surface 203, so that the dismounting member can find the stress point of the screw body 1, so as to take out the screw body 1 from the inside of the threaded hole.
[0033] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.
Claims
1. A corrosion-resistant and high-temperature-resistant tailless screw sleeve, comprising a screw sleeve body (1), characterized in that: The screw sleeve body (1) comprises an outer screw ring (3), a screw ring body (302) and an inner shrink ring (301), wherein a disassembly groove (2) is provided on the outer screw ring (3), the outer screw ring (3) is located on the upper side of the screw ring body (302), and the inner shrink ring (301) is located in the middle of the screw ring body (302).
2. The anti-corrosion and high-temperature resistant tailless screw sleeve according to claim 1, characterized in that: The screw sleeve body (1) is made of an iron-nickel alloy (101), and the outer layer of the iron-nickel alloy (101) is provided with a zinc plating layer (102).
3. The anti-corrosion and high-temperature resistant tailless screw sleeve according to claim 1, characterized in that: The disassembly groove (2) comprises a wedge-shaped surface (201), a smooth surface (202) and an embedded surface (203).
4. The anti-corrosion and high-temperature resistant tailless screw sleeve according to claim 1, characterized in that: The diameter of the inner shrinkage ring (301) is three quarters of the diameter of the spiral ring body (302).
5. The anti-corrosion and high-temperature resistant tailless screw sleeve according to claim 1, characterized in that: The diameter of the coil body (302) is three quarters of the diameter of the outer coil (3).
6. The anti-corrosion and high-temperature resistant tailless screw sleeve according to claim 1, characterized in that: It also includes an outer expansion ring (4), the outer expansion ring (4) has the same diameter as the outer spiral ring (3), and a rectangular surface is provided on the bottom side of the outer expansion ring (4).