Self-corrosion-resistant unbonded foundation bolt
By creating an oil reservoir in the unbonded anchor bolt and injecting anti-corrosion oil, the corrosion problem caused by poor drainage in traditional unbonded anchor bolts is solved, achieving a higher anti-corrosion effect and equipment stability.
Patent Information
- Application Number
- CN202520179576.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-05
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2035-02-05
AI Technical Summary
Traditional unbonded anchor bolts, when long, suffer from poor drainage, leading to severe corrosion of the bolt portion, which affects mechanical strength and equipment stability. Furthermore, the drainage pipes are prone to clogging, increasing maintenance difficulty and costs.
A sealed oil reservoir is formed between the bolt and the sleeve. Anti-corrosion oil is injected through the oil delivery pipe to form a protective film that isolates air and moisture, prevents corrosion, and reduces wear when the equipment vibrates.
This improves the corrosion resistance of anchor bolts, extends their service life, reduces maintenance costs, and ensures stable equipment operation.
Smart Images
Figure CN223578448U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of bolt connection technology, specifically to a self-corrosion-resistant, non-adhesive anchor bolt. Background Technology
[0002] Anchor bolts are divided into bonded anchor bolts and unbonded anchor bolts.
[0003] Among them, bonded anchor bolts are directly embedded in the concrete, forming a tight bond with it. After the concrete hardens, the bolt and the concrete become a whole. This bonding effect allows the bolt to effectively transmit various loads on the equipment, such as vertical pressure and horizontal tension. It is widely used in some static equipment foundations, such as column base foundations of steel structure workshops.
[0004] Unbonded anchor bolts are encased in sleeves, allowing for relative sliding between the bolt and the sleeve. This design is advantageous for power equipment, which generates vibrations during operation. Unbonded anchor bolts allow for slight displacement and vibration within a certain range, preventing excessive vibration transmission to the foundation structure and also preventing bolt fatigue failure due to frequent vibration. They are frequently used, for example, in the foundation fixing of large motors, steam turbines, coal mills, and other power equipment in factories.
[0005] Traditional unbonded anchor bolts have good ductility but poor corrosion resistance, such as... Figure 1 As shown, the usual method of corrosion prevention is to connect a drainage pipe 3 inside the sleeve 2 so that accumulated water can be discharged to the outside of the foundation, thereby preventing corrosion of the bolt body 1 due to moisture or water accumulation. However, this method has obvious drawbacks in practical applications.
[0006] When the anchor bolts are long, the drainage pipe cannot be installed at the bottom of the bolt, so the water around the bolt part located deep underground cannot be effectively drained.
[0007] Bolts exposed to humid environments for extended periods are highly susceptible to corrosion. This not only weakens the bolts' mechanical strength and affects their securing effect on equipment, but severe corrosion can also lead to equipment loosening and displacement, potentially causing safety accidents. Furthermore, over time, drainage pipes may become clogged for various reasons, further reducing drainage efficiency, accelerating bolt corrosion, and increasing the difficulty and cost of equipment maintenance, ultimately failing to meet the long-term stable operation requirements of industrial production. Utility Model Content
[0008] The main objective of this application is to provide a self-corrosion-resistant, non-adhesive anchor bolt, which aims to solve the aforementioned technical problems.
[0009] The technical solution adopted in this application is as follows:
[0010] A self-corrosion non-bonding anchor bolt comprises a bolt body and a sleeve, the bolt body is arranged in the sleeve, the bolt body and the sleeve are sealed at the top and the bottom to form an oil storage cavity between the bolt body and the sleeve, an oil delivery pipe is communicated to the oil storage cavity, and a sealing end cover is arranged at the outer end of the oil delivery pipe.
[0011] Optionally, the oil delivery pipe is arranged obliquely upward, and an angle between the oil delivery pipe and the horizontal plane is 10-20 degrees.
[0012] Optionally, the bottom of the bolt body and the bottom of the sleeve are sealed by welding.
[0013] Compared with the prior art, the beneficial effects of the present application are:
[0014] The self-corrosion non-bonding anchor bolt provided by the embodiment of the present application is formed by sealing the bolt body and the sleeve, an oil storage cavity is formed between the bolt body and the sleeve, an oil delivery pipe is arranged outside the oil storage cavity, the oil storage cavity is filled with corrosion-resistant oil through the oil delivery pipe, the corrosion-resistant oil can be stored in the oil storage cavity for a long time, the corrosion-resistant oil is uniformly distributed on the surface of the bolt body to form a continuous protective film, the corrosion-resistant effect is enhanced, the service life and stability of the anchor bolt are improved, and the maintenance cost and safety hazards are reduced. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 It is a structural schematic diagram of a traditional non-bonding anchor bolt;
[0016] Figure 2 It is a structural schematic diagram of the self-corrosion non-bonding anchor bolt provided by the embodiment of the present application.
[0017] Explanation of reference numerals in the drawings:
[0018] 1-bolt body, 2-sleeve, 3-drainage and water delivery pipe, 4-oil storage cavity, 5-oil delivery pipe, 6-sealing end cover. DETAILED DESCRIPTION
[0019] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0020] It should be noted that all the direction indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the direction indications will also change accordingly.
[0021] In the present application, unless specifically defined and limited otherwise, the terms "connection", "fixation", etc. should be understood in a broad sense, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium; can be internal connection of two elements or interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0022] In addition, if the present application has a description of "first", "second", etc., the description of "first", "second", etc. is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel solutions. For example, "A and / or B" includes A solution, or B solution, or A and B solution. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it. When the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist and is not within the scope of protection claimed by the present application.
[0023] Referring to the drawings Figure 2 As shown in the drawings, the self-corrosion non-bonding anchor bolt provided by the embodiments of the present application comprises a bolt body 1 and a sleeve 2. The outside of the sleeve 2 is a concrete foundation, and the sleeve 2 is sleeved outside the bolt body 1. After the bolt body 1 and the sleeve 2 are installed, the assembly gap between the bottom of the sleeve 2 and the bottom of the bolt body 1 is sealed by field welding, and the top of the sleeve 2 and the top of the bolt body 1 are sealed in a conventional manner, so as to form an annular cavity between the sleeve 2 and the bolt body 1 for use as an oil storage chamber 4. The oil storage chamber 4 is communicated with an external oil delivery pipe 5. After the sleeve 2 and the bolt body 1 are assembled and sealed, corrosion-resistant oil with lubricating and corrosion-resistant properties is injected from the oil delivery pipe 5. The top of the oil delivery pipe 5 is sealed by a threaded sealing end cover 6, the oil delivery pipe 5 is arranged obliquely upward, and forms an angle of 10-20 degrees with the horizontal plane. The obliquely upward arranged oil delivery pipe 5 not only facilitates the injection of corrosion-resistant oil, but also facilitates the regular inspection of the storage amount of corrosion-resistant oil.
[0024] From the above, the self-corrosion anchor bolt provided by the embodiment of the application changes the cavity between the threaded body and the sleeve into an oil storage cavity structure suitable for anchor bolt corrosion prevention, and an oil delivery pipe is added. After the corrosion-proof oil is injected into the oil storage cavity, air and moisture are directly isolated, the oxygen in the air and the moisture are prevented from directly contacting the bolt metal, the corrosion prevention effect is improved, and meanwhile, the corrosion-proof oil can effectively reduce the friction between the bolt body and the sleeve. In the equipment operation process, the anchor bolt will be subjected to fretting wear due to factors such as equipment vibration and temperature change, the corrosion-proof oil can make the relative movement between the bolt and the sleeve more smooth, thereby reducing the wear, and helping to maintain the size precision and mechanical properties of the bolt.
[0025] The above only describes the preferred embodiments of the application and is not intended to limit the application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application shall be included in the protection scope of the application.
Claims
1. A self-conservative anchor bolt free of adhesive, comprising a bolt body and a sleeve, the bolt body being disposed in the sleeve, characterized by, The bolt body and the sleeve are sealed at the top and bottom to form an oil storage cavity between the bolt body and the sleeve, an oil delivery pipe is communicated into the oil storage cavity, and a sealing end cover is arranged at the outer end of the oil delivery pipe.
2. The self-preservative non-bonded anchor bolt according to claim 1, characterized in that, The oil delivery pipe is arranged obliquely upward, and the oil delivery pipe and the horizontal plane form an angle of 10-20 degrees.
3. The self-preservative non-bonded anchor bolt according to claim 1, wherein, The bottom of the bolt body and the bottom of the sleeve are sealed by welding.