SCREW-IN BACK BOLT AND METHOD FOR INSTALLING CURTAIN WALL AND PANEL THEREWITH

Abstract

A screw-in back bolt comprises a back bolt sleeve and a limit screw. A front end of the back bolt sleeve is an expandable portion that can be expanded by the limit screw. The limit screw (3) can be screwed in from a rear end of the anchor bolt sleeve until the limit screw is secured in place. The expandable portion of the back bolt sleeve (2) is provided with one or more conical surfaces. A method for installing a panel based on the screw-in back bolt comprises: drilling an back bolt hole in a back of the panel; injecting an adhesive into the back bolt hole; placing the back bolt sleeve into the back bolt hole; and screwing the limit screw into the back bolt sleeve to expand the anchor bolt sleeve. A curtain wall comprises the panel and the screw-in anchor bolt.

Claims

1. A method for installing a panel based on a screw-in back bolt, comprising: step A: drilling an anchor bolt hole in a back of the panel; step B: injecting an adhesive into the anchor bolt hole; step C: placing an back bolt sleeve of the back bolt into the anchor bolt hole; and step D: screwing a limit screw of the back bolt into the back bolt sleeve so that the back bolt sleeve is spread.

2. The method according to claim 1, wherein, the step A comprises: step A1: drilling a straight hole in the back of the panel; and step A2: expanding a bottom of the straight hole into a counterbore, wherein, the counterbore has a pressure-bearing surface capable of locking the spread back bolt sleeve in an axial direction.

3. The method according to claim 2, wherein, the counterbore is only capable of locking the spread back bolt sleeve in an axial direction.

4. The method according to claim 1, wherein, the step B comprises: step B1: injecting the adhesive into the anchor bolt hole, wherein, an injection amount meets: the adhesive is capable of filling all or partial anchor bolt holes after the back bolt is spread; and the adhesive comprises an epoxy resin AB adhesive.

5. The method according to claim 1, wherein, the step C comprises: step C1: pushing the back bolt sleeve of the back bolt into the anchor bolt hole until a front end of the back bolt sleeve is abutted against the hole bottom of the anchor bolt hole; wherein, before spread, a maximal diameter of the anchor bolt sleeve is smaller than a minimal diameter of the anchor bolt hole.

6. The method according to claim 2, wherein, the step D comprises: step D1: screwing a limit screw in place, wherein, screwing the limit screw in place means that the front part of the back bolt sleeve is spread until being locked by the pressure-bearing surface of the counterbore in an axial direction, and the back bolt sleeve is capable of freely rotating in the anchor bolt hole.

7. The method according to claim 1, comprising: step E: screwing a slip preventing nut on the limit screw to lock a metal suspender.

8. A screw-in back bolt, comprising a back bolt sleeve and a limit screw; wherein a front part of the back bolt sleeve is an expandable portion capable of being spread by the limit screw; the limit screw is capable of being screwed in from a rear end of the back bolt until the limit screw is locked; and the expandable portion of the back bolt sleeve is provided with one or more conical surfaces.

9. A curtain wall installed by using the method according to claim 1.

10. A curtain wall, comprising a panel and the screw-in back bolt according to claim 8; wherein an anchor bolt hole is drilled in a back of the panel, the back bolt sleeve of the screw-in back bolt is located in an anchor bolt hole, and the back bolt sleeve is spread by the screw-in limit screw; the spread back bolt sleeve is locked by the anchor bolt hole in an axial direction; and the back bolt sleeve is firmly connected with the anchor bolt hole through an adhesive in circumferential and radial directions.

Description

DESCRIPTION OF THE DRAWINGS

[0019] Other features, objectives and advantages of the disclosure will become more apparent by referring to detailed description of non-limiting embodiments made according to the following accompanying drawings.

[0020] FIG. 1 is a structural diagram of an installed back bolt. O represents a length of an exposed limit screw.

[0021] FIG. 2 is an exploded view of a component in FIG. 1. D represents a length of a back bolt sleeve in an axial direction. S represents a length of a limit screw.

[0022] FIG. 3 is a structural diagram of an installed back bolt.

[0023] FIG. 4 is a structural diagram of an installed back bolt.

[0024] FIG. 5 is an exploded view of a component in FIG. 4.

[0025] FIG. 6 is a structural diagram of a back bolt sleeve before being spread.

[0026] In the drawings:

[0027] 1panel

[0028] 101straight hole section

[0029] 102counterbore section

[0030] 103pressure-bearing surface

[0031] 2back bolt sleeve

[0032] 201first conical surface

[0033] 202second conical surface

[0034] 3limit screw

[0035] 301positioning line (also referred to as a limit line)

[0036] 4installation bracket (also referred to as a suspender)

[0037] 5slip preventing nut

[0038] 6adhesive

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

[0039] The disclosure will be described in detail in combination with embodiments. The following examples will help those skilled in the art to understand the disclosure, but does not limit the disclosure in any form. It should be noted that for one of ordinary skill in the art, several changes and modifications can also be made without breaking away from conception of the disclosure. These all belong to the protection scope of the disclosure.

[0040] The disclosure provides a screw-in back bolt, also provides a method for installing a panel based on the screw-in back bolt, and further provides a curtain wall based on the screw-in back bolt and utilizing the installation method. In the following, the disclosure will be described in detail.

[0041] The disclosure provides a method for installing a panel based on a screw-in back bolt, including:

[0042] Step A: drilling an anchor bolt hole in the back of a panel;

[0043] Step B: injecting an adhesive into the anchor bolt hole;

[0044] Step C: placing a back bolt sleeve of the back bolt into the anchor bolt hole;

[0045] Step D: screwing a limit screw of the back bolt into the back bolt sleeve so that the back bolt sleeve is spread; and

[0046] Step E: screwing a slip preventing nut on the limit screw to lock a metal suspender.

[0047] The step A includes: step A1: drilling a straight hole in the back of the panel; and step A2: expanding the bottom of the straight hole into a counterbore, wherein, the counterbore has a pressure-bearing surface capable of locking the spread back bolt sleeve in an axial direction.

[0048] Preferably, the counterbore is only capable of locking the spread back bolt sleeve in an axial direction.

[0049] The step B includes: step B1: injecting the adhesive into the anchor bolt hole, wherein, the injection amount meets: the adhesive is capable of filling all or partial anchor bolt holes after the back bolt is spread. Preferably, the adhesive can be an epoxy resin AB adhesive (high-elasticity 6101 and 618 series are preferably used). During the epoxy time of the adhesive, the back bolt sleeve is installed and the limit screw is installed in place. The adhesive can be injected into a position which is 50% of the depth of the anchor bolt hole. When the limit screw is installed in the back bolt sleeve, the epoxy adhesive fills all the holes in the anchor bolt holes so as to ensure that all the back bolts on the panel are effective and stressed, thereby reducing the dropping risk of the panel to zero.

[0050] The step C includes: step C1: pushing the back bolt sleeve of the back bolt into the anchor bolt hole until the front end of the back bolt sleeve is abutted against the hole bottom of the anchor bolt hole, wherein, before spread, a maximal diameter of the back bolt sleeve is smaller than a minimal diameter of the anchor bolt hole. The back bolt sleeve can be all or partially embedded into the anchor bolt hole.

[0051] The step D includes: step D1: screwing a limit screw in place, wherein, screwing the limit screw in place means that the front part of the back bolt sleeve is spread until being locked by the pressure-bearing surface of the counterbore in an axial direction, and the back bolt sleeve is capable of freely rotating in the anchor bolt hole. Preferably, the limit screw is provided with a limit line, when the limit line is parallel to the hole mouth of the anchor bolt hole or the back end surface of the anchor bolt hole, the limit screw is right screwed in place. Through the continuous rotation of the limit screw, the limit screw is screwed into the back bolt sleeve in the panel layer by layer. When being rotated in place according to indication of the limit line, the limit screw is installed in place. The rotation torsion in the whole process is only 12N m/s. After installation, before the adhesive is solidified, the back bolt can be freely rotated in the anchor bolt hole of the panel without stress concentration on the inside of the panel.

[0052] The disclosure provides a screw-in back bolt, including a back bolt sleeve and a limit screw. The front part of the anchor bolt sleeve is an expandable portion capable of is spread by the limit screw; the limit screw is screwed in from the rear end of the back bolt sleeve; when the expandable portion is not spread, the outer diameter of the expandable portion is smaller than that of the rear of the back bolt sleeve.

[0053] As shown in FIG. 1, the expandable portion of the back bolt sleeve is provided with more conical surfaces, respectively denoted as a first conical surface and a second conical surface, wherein, the conical surface is of a local side shape of a frustum. Further particularly, the first conical surface is matched with the pressure-bearing surface of the counterbore, namely, the first conical surface is clamped inside the pressure-bearing surface, so that the back bolt sleeve cannot be pulled out from the counterbore; the second conical surface is matched with the adhesive, so as to greatly improve the strength of the screw-in back bolt.

[0054] The disclosure provides a curtain wall. The curtain wall is installed by adopting the method for installing a panel based on the screw-in back bolt.

[0055] The disclosure provides a curtain wall, including a panel and the above screw-in back bolt; an anchor bolt hole is drilled in the back of the panel, the back bolt sleeve of the screw-in back bolt is located in the anchor bolt hole, and the back bolt sleeve is spread by the screwed limit screw; the spread back bolt sleeve is locked by the anchor bolt hole in an axial direction; the back bolt sleeve is firmly connected with the anchor bolt hole through the adhesive in circumferential and radial directions.

[0056] The above contents are description of embodiments of the disclosure. It should be understood that the invention is not limited to the above specific embodiments, those skilled in the art can make various changes or modifications within the scope of the claims, which does not influence the substantial content of the disclosure. In case without conflict, embodiments of the present application and features in embodiments can be mutually combined randomly.