A kind of assembled building semi-grouting sleeve lightning protection connection device

Abstract

The invention discloses a semi-grouting sleeve lightning protection connection device for an assembled building, comprising an upper structure steel bar, a semi-grouting sleeve and a lower structure steel bar, wherein one end of the upper structure steel bar is detachably connected to one end of the semi-grouting sleeve, an accommodating cavity is arranged on the inner cylinder wall of the semi-grouting sleeve located on one side of the upper structure steel bar, an elastic connector is arranged in the accommodating cavity, a fixing piece is arranged inside the semi-grouting sleeve, one end of which is detachably connected to the lower structure steel bar and the other end is connected to the elastic connector through a rotating connector, when the rotating connector is screwed into the accommodating cavity, the fixing piece is connected to the lower structure steel bar, and at the same time, the upper structure steel bar, the semi-grouting sleeve, the rotating connector, the fixing piece and the lower structure steel bar form a conductive path. The invention does not need to add a conductive connector on the outside, does not need external construction, is more convenient to operate, and solves the problem of no operating surface for internal construction.

Description

Technical Field

[0001] The invention relates to the technical field of building lightning protection, and in particular to an assembled building semi-grouting sleeve lightning protection connection device. Background Art

[0002] Prefabricated concrete buildings are characterized by standardized factory production and integrated on-site assembly. When vertical components are prefabricated, the connection method of vertical components mainly adopts sleeve grouting. The upper and lower steel bars are disconnected in the sleeve. The sleeve grouting process makes the upper and lower steel bars blocked by the grouting material, and electrical penetration cannot be formed. Therefore, it is difficult to use the steel bars with internal electrical penetration as lightning protection down conductors like traditional cast-in-place concrete vertical components.

[0003] The existing solution is to add a conductive part in the grouting sleeve to achieve electrical conduction between the grouting sleeve and the lower steel bar, thereby achieving electrical conduction between the upper steel bar and the lower steel bar. For example, the patent specification with the announcement number CN105064521B discloses a sleeve connection device for lightning protection and grounding of structural steel bars in industrialized buildings, including a grouting sleeve, a structural steel bar A, a structural steel bar B, and a lightning protection connection mechanism. The grouting sleeve includes a prefabricated connection section and a grouting connection section. One end of the structural steel bar A is connected to the prefabricated connection section. The grouting sleeve and the structural steel bar A are pre-embedded in the structural member A. The structural steel bar B is pre-embedded in the structural member B, and one end extends out of the end face of the structural member B. The grouting sleeve is connected to the structural steel bar B through the lightning protection connection mechanism to form a conductive path; the lightning protection connection mechanism includes a metal spring, which is connected to one end of the structural steel bar B extending out of the structural member B, and contacts the inner wall of the grouting connection section when the structural member A and the structural member B are assembled. The disadvantage of the above solution is that the contact area between the metal spring and the grouting sleeve is limited. After grouting, the slurry will enter the contact position between the metal spring and the grouting sleeve, making the electrical conduction unstable.

[0004] The existing solution is to achieve electrical conduction of the upper and lower steel bars by welding the upper and lower metal conductors connected to the upper and lower steel bars respectively outside the prefabricated parts. For example, the patent specification with the publication number CN205617591U discloses a down-conductor node structure in a prefabricated column for lightning protection of assembled buildings, including a prefabricated wall, an upper vertical distribution steel bar, a lower vertical distribution steel bar, an upper metal conductor, a lower metal conductor, upper and lower metal connection points, a grouting sleeve, a horizontal post-cast strip or a ring beam, the upper vertical distribution steel bar is arranged in the upper prefabricated board, the lower vertical distribution steel bar is arranged in the lower prefabricated board, and the grouting sleeve connects the upper vertical distribution steel bar with the lower The upper part of the upper metal conductor is connected to the upper vertical steel bars, and the lower part of the upper metal conductor is led out of the outside of the prefabricated wall. The lower part of the lower metal conductor is connected to the lower vertical steel bars, and the upper part of the lower metal conductor is led out of the outside of the prefabricated wall. The ends of the upper metal conductor and the lower metal conductor leading out of the outside of the prefabricated wall are connected in the horizontal post-cast strip or ring beam to form upper and lower metal connection points, so that the vertical connecting steel bars from the roof to the first floor form an electrical path as a lightning protection down conductor. The disadvantage of the above scheme is that the welding construction is difficult due to the narrow operation interface. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides an assembled building semi-grouting sleeve lightning protection connection device, which does not require additional conductive connectors on the outside, does not require external construction, is more convenient to operate, and solves the problem of no operating surface for internal construction.

[0006] A semi-grouting sleeve lightning protection connection device for an assembled building comprises an upper structure steel bar, a semi-grouting sleeve and a lower structure steel bar, wherein one end of the upper structure steel bar is detachably connected to one end of the semi-grouting sleeve, an accommodating cavity is arranged on the inner cylinder wall of the semi-grouting sleeve on one side of the upper structure steel bar, an elastic connector is arranged in the accommodating cavity, a fixing member is arranged inside the semi-grouting sleeve, one end of the fixing member is detachably connected to the lower structure steel bar and the other end is connected to the elastic connector through a rotating connector, when the rotating connector is screwed into the accommodating cavity, the fixing member is connected to the lower structure steel bar, and at the same time, the upper structure steel bar, the semi-grouting sleeve, the rotating connector, the fixing member and the lower structure steel bar form a conductive path.

[0007] Before assembly, the upper structure steel bars are connected with the semi-grouting sleeve and embedded in the upper prefabricated component, and the lower structure steel bars are embedded in the lower prefabricated component. During assembly, the upper prefabricated component is hung on the lower prefabricated component, and the upper prefabricated component is slowly lowered to allow the lower structure steel bars to extend into the semi-grouting sleeve. The lower structure steel bars press against the fixing parts, compress the elastic connecting parts, and allow the rotating connecting parts to slowly rotate into the accommodating cavity. At the same time, the fixing parts are connected to the lower structure steel bars in a rotating state.

[0008] In the above scheme, electrical conduction between the upper structure steel bars and the lower structure steel bars can be achieved during the falling process of the upper prefabricated components, without the need to add conductive connectors on the outside, making construction more convenient and solving the problem of no operating surface for internal construction.

[0009] Preferably, the rotating connector includes a pressure block connected to one end of the elastic connector, a rotating shaft rotatably connected to the pressure block, and a rotating rod connected to one end of the rotating shaft away from the pressure block, and the other end of the rotating rod is connected to the fixed member. More preferably, the rotating shaft is connected to the pressure block via a bearing. The elastic connector can specifically use a spring, and when the pressure block squeezes the spring, the rotating rod rotates itself and does not apply torsional force to the spring.

[0010] Further preferably, the rotating rod is provided with a spiral groove, and the side wall of the accommodating cavity is provided with a protrusion that can slide along the groove, so that the rotating rod can be screwed into the accommodating cavity under force. Specifically, the spiral rod can be twisted around its own axis to form a spiral groove, or the spiral groove can be opened on itself, and when the protrusion on the side wall of the accommodating cavity slides along the spiral groove, the rotating rod rotates.

[0011] Preferably, the lower structure reinforcement is threadedly connected to the fixing member. More preferably, the lower structure reinforcement is connected to the fixing member by a tapered thread. When the rotating rod rotates, the fixing member is driven to rotate. When the rotating fixing member contacts the end of the lower structure reinforcement, the lower structure reinforcement can just be screwed into the fixing member. The tapered thread makes the connection between the two more convenient.

[0012] Preferably, the inner wall of the semi-grouting sleeve located on one side of the upper structure reinforcement is further provided with a limit snap hole distributed around the accommodating cavity, and the fixing member is provided with a limit snap ring that cooperates with the limit snap hole when the rotating connector is screwed into the accommodating cavity. Specifically, the limit snap ring has a certain elasticity, and after the rotating connector is rotated into place, the limit snap ring is deformed until the limit snap ring extends into the corresponding limit snap hole, and a sound is generated after the engagement, thereby judging whether the rotating connector is screwed into place.

[0013] Preferably, a positioning ring is provided on the side wall of the fixing part, and the positioning ring is observed through the grout outlet of the semi-grouting sleeve to determine whether the rotating connector is rotated into place. Specifically, a mark can be provided on the positioning ring, for example, the positioning ring is provided with a color, and the positioning ring is observed from the grout outlet of the semi-grouting sleeve to determine whether the color is complete. If it is incomplete, it indicates that the positioning ring has not reached the specified height, and thus it is determined whether the rotating connector is screwed into place.

[0014] The beneficial effects of the present invention are as follows: by rotating the connecting piece into the accommodating cavity, the fixing piece is connected to the steel bars of the lower structure. The design is ingenious, there is no need to add conductive connecting pieces on the outside, no external construction is required, the operation is more convenient, and the problem of no operating surface for internal construction is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure before assembly of the present invention;

[0016] Figure 2 This is a schematic diagram of the structure of the present invention after assembly. DETAILED DESCRIPTION

[0017] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0018] like Figure 1 and 2 As shown, a semi-grouting sleeve lightning protection connection device for an assembled building includes an upper structure steel bar 1, a semi-grouting sleeve 2 and a lower structure steel bar 3. One end of the upper structure steel bar 1 is connected to one end of the semi-grouting sleeve 2 by a thread. The semi-grouting sleeve 2 is provided with a grouting outlet 201 and a grouting outlet 202. Before assembly, the upper structure steel bar 1 is connected to the semi-grouting sleeve 2 and then embedded in the upper prefabricated component, and the lower structure steel bar 3 is embedded in the lower prefabricated component.

[0019] Among them, the semi-grouting sleeve 2 is provided with a accommodating cavity 21 on the inner cylinder wall on one side of the upper structure steel bar 1, and an elastic connector 4 is provided in the accommodating cavity 21. Specifically, the elastic connector 4 adopts a spring; a fixing part 6 is provided inside the semi-grouting sleeve 2, one end of which is threadedly connected to the lower structure steel bar 3 and the other end is connected to the elastic connector 4 through a rotating connector 5. When the rotating connector 5 is screwed into the accommodating cavity 21, the fixing part 6 is connected to the lower structure steel bar 3, and at the same time, the upper structure steel bar 1, the semi-grouting sleeve 2, the rotating connector 5, the fixing part 6 and the lower structure steel bar 3 form a conductive path.

[0020] In this embodiment, the rotating connecting member 5 includes a pressure block 51 connected to one end of the elastic connecting member 4, a rotating shaft 52 rotatably connected to the pressure block 51, and a rotating rod 53 connected to one end of the rotating shaft 52 away from the pressure block 51, and the other end of the rotating rod 53 is connected to the fixing member 6; specifically, the rotating rod 53 is rotatably connected to the pressure block 51 via a bearing arranged on the pressure block 51.

[0021] A spiral groove 531 is provided on the rotating rod 53 , and a protrusion 211 that can slide along the groove 531 is provided on the side wall of the accommodating cavity 21 . When the protrusion 211 slides along the groove 531 , the rotating rod 53 is rotated.

[0022] In order to facilitate the connection between the fixing piece 6 and the lower structure steel bar 3, the fixing piece 6 and the lower structure steel bar 3 are connected by a tapered thread. Specifically, a tapered thread groove 61 is provided at the bottom of the fixing piece 6, and a tapered thread is provided at the top of the lower structure steel bar 3.

[0023] In order to facilitate the judgment of whether the rotating connector 5 is screwed into place, a limit snap-in 22 distributed around the accommodating cavity 21 is also provided on the inner cylinder wall of the semi-grouting sleeve 2 on one side of the upper structure steel bar 1, and a limit snap ring 62 is provided on the fixing member 6 to cooperate with the limit snap-in 22 when the rotating connector 5 is screwed into the accommodating cavity 21. Specifically, the limit snap ring 62 has a certain elasticity. After the rotating connector 5 is rotated into place, the limit snap ring 62 is deformed until the limit snap ring 62 extends into the corresponding limit snap-in 22. A sound is generated after the engagement, thereby judging whether the rotating connector 5 is screwed into place.

[0024] To judge whether the rotating connector 5 is screwed into place, a positioning ring 63 is provided on the side wall of the fixing member 6, and the positioning ring 63 is observed through the grouting outlet 21 of the semi-grouting sleeve 2 to determine whether the rotating connector is rotated into place. Specifically, the positioning ring is set to be colored, such as red, and the color of the positioning ring 63 is observed from the grouting outlet 201 of the semi-grouting sleeve 2 to determine whether it is complete. If not, it indicates that the positioning ring 63 has not reached the specified height, thereby judging whether the rotating connector 5 is screwed into place.

[0025] Assembly process and principle of the present invention:

[0026] The upper prefabricated component is suspended on the lower prefabricated component, and the upper prefabricated component is slowly lowered so that the lower structure steel bar 3 extends into the grouting sleeve 2, and the lower structure steel bar 2 presses the fixing piece 6. The elastic connecting piece 4 is compressed by the pressing block 51, so that the rotating rod 53 extends into the accommodating cavity 21, and the protrusion 211 on the side wall of the accommodating cavity 21 slides along the groove 531 on the rotating rod 53, so that the rotating rod 53 is rotated into the accommodating cavity 21, and at the same time, the fixing piece 6 is connected with the lower structure steel bar 3 in a rotating state.

[0027] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A semi-grouting sleeve lightning protection connection device for assembled buildings, comprising upper structure steel bars, a semi-grouting sleeve and lower structure steel bars, wherein one end of the upper structure steel bars is detachably connected to one end of the semi-grouting sleeve, and is characterized in that: The semi-grouting sleeve is provided with a receiving cavity on the inner cylinder wall on one side of the upper structure steel bar, and an elastic connector is provided in the receiving cavity. A fixing piece is provided inside the semi-grouting sleeve, one end of which is detachably connected to the lower structure steel bar and the other end of which is connected to the elastic connector through a rotating connector. When the rotating connector is screwed into the receiving cavity, the fixing piece is connected to the lower structure steel bar, and at the same time, the upper structure steel bar, the semi-grouting sleeve, the rotating connector, the fixing piece and the lower structure steel bar form a conductive path. The rotating connecting member comprises a pressing block connected to one end of the elastic connecting member, a rotating shaft rotatably connected to the pressing block, and a rotating rod connected to one end of the rotating shaft away from the pressing block, and the other end of the rotating rod is connected to the fixing member; The rotating rod is provided with a spiral groove, and the side wall of the accommodating cavity is provided with a protrusion that can slide along the groove, so that the rotating rod can be rotated into the accommodating cavity under force; The lower structural steel bars are threadedly connected to the fixing pieces.

2. The semi-grouting sleeve lightning protection connection device for assembled buildings according to claim 1 is characterized in that: The rotating shaft and the pressing block are connected via a bearing.

3. The semi-grouting sleeve lightning protection connection device for assembled buildings according to claim 1 is characterized in that: The lower structural steel bars are connected to the fixing pieces by using tapered threads.

4. The semi-grouting sleeve lightning protection connection device for assembled buildings according to claim 1 is characterized in that: The inner cylinder wall of the semi-grouting sleeve located on one side of the upper structure steel bar is also provided with a limit snap ring distributed around the accommodating cavity, and the fixing piece is provided with a limit snap ring that cooperates with the limit snap ring when the rotating connecting piece is screwed into the accommodating cavity.

5. The semi-grouting sleeve lightning protection connection device for assembled buildings according to claim 1 is characterized in that: A positioning ring is arranged on the side wall of the fixing member, and the positioning ring is observed through the grout outlet of the grouting sleeve to determine whether the rotating connector is rotated into place.

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