Self-bottom-expanding anchor bolt

Abstract

The utility model provides a self-bottom-expanding anchor bolt, which comprises a screw rod, a bottom-expanding casing pipe, an anti-shock compression ring, a connecting casing pipe, a gasket and a leveling nut, the bottom-expanding casing pipe is sleeved at the expanding end of the screw rod, the connecting casing pipe is sleeved at the middle part of the screw rod, the anti-shock compression ring is sleeved on the screw rod and is clamped between the bottom-expanding casing pipe and the connecting casing pipe, and the gasket is arranged on the anti-shock compression ring. The gasket is arranged at the threaded end of the leveling nut in a sleeving mode and is locked through the leveling nut. According to the anchor bolt, the split type sleeve design is adopted, and the anti-seismic compression ring is additionally arranged in the middle of the split type sleeve, so that the anti-seismic capacity is enhanced, moisture and corrosive gas can be prevented from entering the anchor bolt, and the service life of the anchor bolt is greatly prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of anchor bolt especially relates to a self expanding bottom anchor bolt. BACKGROUND

[0002] Mechanical anchor bolt is the assembly that is anchored on the concrete base material by the frictional action or lock key action between anchor bolt and drilling, and the main force component is composed of fastener, cone head, expansion piece etc. made of metal material, and the mechanical anchor bolt includes: expansion anchor bolt, self expanding bottom anchor bolt, self tapping anchor bolt etc. Since the self expanding bottom anchor bolt forms the lock key with expansion anchor bolt to take the mechanical meshing force as the anchoring force, the stress distribution is similar to the big head embedded part, has the characteristics of small stress area, small edge distance and small interval, is suitable for cracked concrete, has excellent anti-seismic performance, and is widely used in the building field of public building, factory building, rail transit, nuclear power etc.

[0003] But the current self expanding bottom anchor bolt still has some problems: poor anti-seismic performance, unable to prevent the entry of moisture and corrosive gas, so that the service life of anchor bolt is reduced.

[0004] Therefore, how to provide a self expanding bottom anchor bolt has become a technical problem urgently to be solved by the person skilled in the art. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a self expanding bottom anchor bolt, through split type sleeve pipe design, anti-seismic compression ring is additionally arranged in the split sleeve pipe, so that the anti-seismic performance is enhanced, the entry of moisture and corrosive gas can be prevented, and the service life of anchor bolt is greatly improved.

[0006] The utility model solves technical problems by adopting the following technical scheme:

[0007] A self expanding bottom anchor bolt, including: screw rod, bottom expansion sleeve, anti-seismic compression ring, connecting sleeve, gasket and leveling nut, the bottom expansion sleeve is sleeved on the expansion end of the screw rod, the connecting sleeve is sleeved on the middle part of the screw rod, the anti-seismic compression ring is sleeved on the screw rod and is clamped between the bottom expansion sleeve and the connecting sleeve, the gasket is sleeved on the threaded end of the leveling nut and is locked by the leveling nut.

[0008] Further, the screw rod is sleeved with a lock washer at the position close to the threaded end.

[0009] Further, the connecting sleeve is provided with a buried depth line at the end away from the anti-seismic compression ring.

[0010] Further, the bottom expansion sleeve is provided with a stress release groove at the position close to the anti-seismic compression ring.

[0011] Further, the leveling nut and the gasket adopt arc-shaped design cooperation.

[0012] Further, the screw rod is provided with an expanding bit head near one end of the expanding sleeve.

[0013] Further, the screw rod, the expanding sleeve, the connecting sleeve, the gasket and the leveling nut are all provided with an anticorrosive coating.

[0014] The utility model discloses beneficial effect:

[0015] The utility model provides a self expanding bottom anchor bolt, through carrying out split type sleeve design, split sleeve middle part adds anti -shock ring, make anti -shock ability enhance, can prevent damp, corrosion gas from entering, has improved the anchor bolt service life greatly. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 For the structure of the utility model Figure One ;

[0017] Figure 2 For the structure of the utility model Figure Two .

[0018] Among them, in the drawing:

[0019] 1-screw rod, 2-expanding sleeve, 3-anti-shock ring, 4-connecting sleeve, 5-gasket, 6-leveling nut, 7-buried depth line, 8-stress release groove, 9-locking ring. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantage of the utility model embodiment clearer, the technical scheme in the utility model embodiment will be described clearly and completely below in conjunction with the drawings in the utility model embodiment, obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skill in the art without creative labor are within the scope of the utility model.

[0021] With reference to the drawings Figure 1 , the utility model provides a self expanding bottom anchor bolt, it includes: screw rod 1, expanding sleeve 2, anti -shock ring 3, connecting sleeve 4, gasket 5 and leveling nut 6, the expanding sleeve 2 is set in the expansion end of screw rod 1, the connecting sleeve 4 is set in the middle part of screw rod 1, the anti -shock ring 3 is set on screw rod 1 and is clamped between expanding sleeve 2 and connecting sleeve 4, the gasket 5 is set in the threaded end of leveling nut 6, and is locked through leveling nut 6.

[0022] To further optimize the technical solution, a burial depth line 7 is provided at the end of the connecting sleeve 4 furthest from the anti-vibration pressure ring 3. This allows construction and installation personnel to easily check and determine whether the expansion plate portion of the expanded sleeve has fully expanded after the expanded sleeve is pushed towards the front end of the screw. The burial depth line is formed by painting or laser marking, without damaging the iron base of the screw, thus avoiding the formation of a ring-shaped damage area and stress concentration.

[0023] To further optimize the technical solution, a stress relief groove 8 is provided at the position of the expanded bottom sleeve 2 near the anti-seismic crush 3, which can effectively discharge the dust generated during the expansion process and reduce the impact of dust on the anchoring quality.

[0024] The technical solution has been further optimized. The leveling nut 6 and the washer 5 are designed with an arc shape to solve the problem of axial force being affected when the drill hole is not perpendicular, and ensure that the anchor bolt is in the best stress state when it is installed at an inclination.

[0025] To further optimize the technical solution, an expansion cutter head is installed at one end of the screw 1 near the expansion sleeve 2. The expansion cutter head adopts 6-point diamond 360° grinding, which can better ensure the tight fit of the expansion position and the expansion effect than 2-point tungsten carbide cutting. It is suitable for heavy anchoring of 0.8mm cracked concrete, which is equivalent to the pre-embedded effect.

[0026] To further optimize the technical solution, the screw 1, expanded-base sleeve 2, connecting sleeve 4, gasket 5, and leveling nut 6 are all equipped with anti-corrosion coatings. The screw is made of high-quality carbon steel or medium-low carbon alloy steel, heat-treated to meet national standard 8.8 requirements, and surface-treated using multi-element alloy co-diffusion processes to form an anti-corrosion coating that meets corrosion requirements. The expanded-base sleeve is also made of high-quality carbon steel and surface-treated using multi-element alloy co-diffusion processes to form an anti-corrosion coating that meets corrosion requirements. The anti-vibration pressure ring is made of engineering plastic and is marked with a bright red warning color. The connecting sleeve is made of high-quality 20 / 45 carbon steel and surface-treated using multi-element alloy co-diffusion processes to form an anti-corrosion coating that meets corrosion requirements. The leveling nut and gasket are preferably galvanized standard parts, made of the same material as the screw. Thickened nuts and washers can be selected as needed, or custom-made according to material, shape, or other special requirements.

[0027] refer to Figure 2 In this utility model, an anti-loosening ring 9 is also fitted on the screw 1 near the threaded end.

[0028] This utility model provides a self-expanding bottom anchor bolt. By adopting a split sleeve design, it can be customized according to the hole diameter and thickness of the anchored object, increasing the bending and shear resistance. An anti-vibration pressure ring is added in the middle of the split sleeve, which enhances the seismic resistance and prevents moisture and corrosive gases from entering, thus greatly improving the service life of the anchor bolt.

[0029] In addition, the utility model discloses can adopt digital detection system to carry out the installation quality detection of self-expanding bottom anchor bolt, guarantees the bearing capacity and torque after anchor bolt installation, ensures the authenticity and traceability of detection data, ensures the reliability of anchor quality evaluation after installation. Through 100% installation fastening torque digitization mode guarantees anchor bolt expansion sleeve installation expansion accuracy, avoids the installation quality unqualified caused by artificial factor, and through the digital detection of pulling bearing capacity, the reliability of installation quality is ensured.

[0030] Finally, it should be noted that: the above examples are used to illustrate the technical solutions of the utility model, but not to limit them; although the utility model has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A self-expanding anchor bolt, characterized in that, include: The components include a screw, an expanded end sleeve, an anti-vibration pressure ring, a connecting sleeve, a washer, and a leveling nut. The expanded end sleeve is fitted onto the expanded end of the screw, the connecting sleeve is fitted onto the middle part of the screw, the anti-vibration pressure ring is fitted onto the screw and clamped between the expanded end sleeve and the connecting sleeve, and the washer is fitted onto the threaded end of the leveling nut and locked by the leveling nut.

2. The self-expanding anchor bolt according to claim 1, characterized in that, An anti-loosening ring is fitted at the position of the screw near the threaded end.

3. A self-expanding anchor bolt according to claim 2, characterized in that, A burial depth line is provided at the end of the connecting sleeve away from the anti-seismic pressure ring.

4. A self-expanding anchor bolt according to claim 1 or 3, characterized in that, The expanded bottom sleeve is equipped with a stress relief groove near the location of the seismic crush resistance.

5. A self-expanding anchor bolt according to claim 1, characterized in that, The leveling nut and the washer are designed with an arc shape for fit.

6. A self-expanding anchor bolt according to claim 1 or 5, characterized in that, The screw is equipped with an expansion cutter head at the end near the expansion sleeve.

7. A self-expanding anchor bolt according to claim 1, characterized in that, The screw, the expanded bottom sleeve, the connecting sleeve, the gasket, and the leveling nut are all coated with an anti-corrosion coating.

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