Connecting structure for lightning protection and grounding of structural reinforcing steel bars in fabricated building
By combining grouting sleeves made of conductive materials in prefabricated buildings with conductive sleeves, threaded connection or welding pre-embedding, and using molten tin liquid and sealing rings, the electrical conduction instability and rust problems are solved, and stability is achieved electrical conduction and simplified construction.
Patent Information
- Application Number
- CN202420923637.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-29
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-04-29
AI Technical Summary
The connecting structure of structural reinforcement lightning protection grounding in existing prefabricated buildings has problems of electrical conductivity and rust, and the construction is difficult.
The grouting sleeve made of conductive material is combined with the conductive sleeve, and is pre-embedded by thread connection or welding. An inverted conical positioning groove is provided on the conductive sleeve, a positioning boss is provided at the bottom of the grouting sleeve, and the exposed end of the steel bars in the lower structure Insert the grouting sleeve and inject molten tin liquid into the formation of an isolation layer and fill the grouting material. The grouting sleeve and the conductive sleeve are sealed by a compression flange and a sealing ring.
It achieves stable electrical conductivity and prevents rust on the joints by grouting materials, simplifying the construction process.
Smart Images
Figure CN222282258U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the fields of structural engineering and electrical engineering, and in particular to a connection structure for lightning protection and grounding of structural steel bars in an assembled building. 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 the steel bars in the vertical components is mainly in the form of sleeve grouting. The upper and lower steel bars are disconnected in the sleeve. The sleeve grouting process blocks the upper and lower steel bars by the grouting material, and electrical penetration cannot be formed. Therefore, it is difficult to use the internal steel bars 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 Chinese patent application with the application date of 2015-08-06 and the application number of CN201520584905.8 discloses a lightning protection grounding sleeve connection device for structural steel bars in prefabricated buildings, wherein the structural steel bar A forms a lightning protection conductive path through the grouting sleeve, the conductive ring, the conductive sleeve and the structural steel bar B in sequence, thereby realizing the use of the structural steel bars of the vertical structural members in the prefabricated concrete structure as lightning protection grounding lead wires. The disadvantage of this solution is that the contact area between the conductive sleeve and the grouting sleeve is limited. After grouting, the slurry will enter the contact position between the conductive sleeve and the grouting sleeve, making the electrical conduction unstable; at the same time, the slurry will also cause corrosion to the conductive sleeve and the grouting sleeve, further affecting the conductivity of both.
[0004] Another example: The Chinese patent application with the application date of 2020-06-03 and application number CN202020997702.2 discloses a sleeve connection device for lightning protection and grounding of prefabricated buildings. The device increases the conductive contact area between the connector and the grouting sleeve by filling a conductive medium between the connector and the grouting sleeve, thereby ensuring stable electrical conduction between the upper structure steel bars and the lower structure steel bars. The disadvantage of this solution is that the connector needs to be threadedly connected to both the lower structure steel bars and the grouting sleeve, and the connector needs to be manually twisted during construction. At the same time, it is necessary to ensure that the upper prefabricated components and the lower prefabricated components are installed in place, which leads to problems of high construction difficulty and cumbersome operation.
[0005] Based on this, the present application provides a connection structure for lightning protection and grounding of structural steel bars in prefabricated buildings that has a more reasonable design, can ensure electrical conductivity and can effectively prevent rust at the connection points. Utility Model Content
[0006] The utility model aims to solve the technical problems existing in the prior art. To this end, the utility model provides a connection structure for lightning protection and grounding of structural steel bars in prefabricated buildings, which has a more reasonable design, can ensure electrical conductivity and can effectively prevent rust at the connection.
[0007] The technical solution adopted by the utility model to solve its technical problems is:
[0008] Provided is a connection structure for lightning protection and grounding of structural steel bars in prefabricated buildings, comprising upper structural steel bars, a grouting sleeve made of conductive material, lower structural steel bars and a conductive sleeve; the upper structural steel bars are threadedly connected or / and welded to the grouting sleeve and are pre-embedded in the upper prefabricated component; the lower structural steel bars are threadedly connected or / and welded to the conductive sleeve and are pre-embedded in the lower prefabricated component; the conductive sleeve is provided with an inverted cone-shaped positioning groove, and the bottom of the grouting sleeve is provided with a positioning boss protruding from the surface of the upper prefabricated component and matching the positioning groove; the exposed end of the lower structural steel bar is inserted into the inner cavity of the grouting sleeve, and molten tin liquid is injected into the inner cavity to form an isolation layer, and grouting material is further injected into the inner cavity after the isolation layer is condensed.
[0009] Preferably, the outer wall of the exposed end of the grouting sleeve is further provided with a clamping flange, and a sealing ring is further provided between the clamping flange and the edge of the conductive sleeve.
[0010] Preferably, the gap between the upper prefabricated component and the lower prefabricated component is filled with mortar.
[0011] Preferably, a tapered guide hole is provided at the bottom of the inner cavity of the grouting sleeve, and the minimum diameter of the guide hole is smaller than the inner diameter of the grouting sleeve.
[0012] Preferably, the upper prefabricated component is provided with a grouting hole and an overflow hole which are connected to the inner cavity of the grouting sleeve, and the overflow hole is located on the top side of the grouting sleeve.
[0013] Preferably, the grouting sleeve and the conductive sleeve are both made of iron material, and their surfaces are galvanized.
[0014] Compared with the prior art, the utility model has the following beneficial effects:
[0015] 1. The utility model utilizes the positioning boss of the grouting sleeve to cooperate with the positioning groove of the conductive sleeve, which can achieve the purpose of positioning and installing the upper and lower prefabricated components on the one hand, and the end surface of the grouting sleeve and the conductive sleeve have a larger contact area on the other hand; the inner cavity of the grouting sleeve is injected with molten tin liquid, which can fill the gap between the grouting sleeve and the conductive sleeve, and after condensation, it can play a welding role to ensure the electrical conductivity of the conductive sleeve and the grouting sleeve. At the same time, the molten tin liquid can form an isolation layer after solidification, which is used to isolate the grouting material in the grouting sleeve, effectively preventing the slurry of the grouting material from entering between the grouting sleeve and the conductive sleeve to affect their electrical conductivity, and can also prevent the slurry from causing rust to the grouting sleeve and the conductive sleeve;
[0016] 2. A sealing ring is also provided between the grouting sleeve and the conductive sleeve through a clamping flange, which can effectively prevent the mortar filled between the upper prefabricated component and the lower prefabricated component from entering between the grouting sleeve and the conductive sleeve, thereby ensuring the electrical conductivity of the grouting sleeve and the conductive sleeve. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:
[0018] Figure 1 It is a structural schematic diagram of the connection structure of the structural steel bar lightning protection grounding in the prefabricated building.
[0019] In the accompanying drawings, the components represented by the reference numerals are listed as follows:
[0020] 1—upper prefabricated component, 1.1—grouting hole, 1.2—overflow hole, 2—upper structural reinforcement, 3—grouting sleeve, 3.1—positioning boss, 3.2—guide hole, 3.3—clamping flange, 4—lower prefabricated component, 5—lower structural reinforcement, 6—conductive sleeve, 6.1—positioning groove, 7—isolation layer, 8—grouting material, 9—mortar, 10—sealing ring. DETAILED DESCRIPTION
[0021] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.
[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0023] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention; the terms "install", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0024] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.
[0025] Embodiment 1
[0026] As attached Figure 1 As shown, this embodiment provides a connection structure for lightning protection and grounding of structural steel bars in prefabricated buildings, including upper structure steel bars 2, a grouting sleeve 3 made of conductive material, lower structure steel bars 5 and a conductive sleeve 6; the upper structure steel bars 2 are threadedly connected to the grouting sleeve 3 or / and welded and pre-embedded in the upper prefabricated component 1, that is, the grouting sleeve is threadedly connected to the upper structure steel bars or welded, or first threadedly connected and then welded, and then the whole is pre-embedded in the upper prefabricated component; the lower structure steel bars 5 are threadedly connected to the conductive sleeve 6 or / and welded and pre-embedded in the lower prefabricated component 4, that is, the conductive sleeve is threadedly connected to the lower structure steel bars or welded, or first threadedly connected and then welded, and then the whole is pre-embedded in the lower prefabricated component.
[0027] Preferably, the conductive sleeve 6 is provided with an inverted cone-shaped positioning groove 6.1, and the bottom of the grouting sleeve 3 is provided with a positioning boss 3.1 protruding from the surface of the upper prefabricated component 1 and matching the positioning groove 6.1. This design can achieve the purpose of positioning and installing the upper and lower prefabricated components on the one hand, and on the other hand, the end surface allows the grouting sleeve and the conductive sleeve to have a larger contact area.
[0028] Preferably, the exposed end of the lower structural steel bar 5 is inserted into the inner cavity of the grouting sleeve 3, and molten tin liquid is injected into the inner cavity to form an isolation layer 7. After the isolation layer 7 is condensed, grouting material 8 is also injected into the inner cavity. This design enables the molten tin liquid to fill the gap between the grouting sleeve and the conductive sleeve. After condensation, it can play a welding role to ensure the electrical conductivity of the conductive sleeve and the grouting sleeve. At the same time, the molten tin liquid can form an isolation layer after solidification, which is used to isolate the grouting material in the grouting sleeve, effectively preventing the slurry of the grouting material from entering between the grouting sleeve and the conductive sleeve to affect their electrical conductivity, and also preventing the slurry from causing rust to the grouting sleeve and the conductive sleeve.
[0029] Preferably, a conical guide hole 3.2 is provided at the bottom of the inner cavity of the grouting sleeve 3, and the minimum diameter of the guide hole 3.2 is smaller than the inner diameter of the grouting sleeve 3. This design enables the lower structural steel bars to enter the grouting sleeve better.
[0030] Preferably, the upper prefabricated component 1 is provided with a grouting hole 1.1 and an overflow hole 1.2 which are connected to the inner cavity of the grouting sleeve 3 , and the overflow hole 1.2 is located on the top side of the grouting sleeve 3 .
[0031] Preferably, the gap between the upper prefabricated component 1 and the lower prefabricated component 4 is filled with mortar 9.
[0032] During the specific implementation, the upper prefabricated component is hoisted to the top of the lower prefabricated component and lowered, so that the lower structural steel bars of the lower prefabricated component enter from the guide hole of the grouting sleeve until the positioning boss of the grouting sleeve completely enters the positioning groove of the conductive sleeve, and a certain amount of molten tin liquid is injected into the inner wall of the grouting sleeve from the grouting hole (the tin liquid does not exceed the grouting hole). After the tin liquid condenses, grouting material is injected into the inner cavity of the grouting sleeve from the grouting hole until the overflow hole overflows, the overflow hole and the grouting hole are sealed, and finally the gap between the upper prefabricated component and the lower prefabricated component is filled with mortar.
[0033] Embodiment 2
[0034] Based on the first embodiment, as shown in the attached Figure 1As shown, in this embodiment, a clamping flange 3.3 is further provided on the outer wall of the exposed end of the grouting sleeve 3, and a sealing ring 10 is further provided between the clamping flange 3.3 and the edge of the conductive sleeve 6. This design can effectively prevent the mortar filled between the upper prefabricated component and the lower prefabricated component from entering between the grouting sleeve and the conductive sleeve, thereby ensuring the electrical conductivity of the grouting sleeve and the conductive sleeve.
[0035] In the above embodiment, the grouting sleeve 3 and the conductive sleeve 6 are both made of iron material, and their surfaces are galvanized, which can effectively prevent the grouting sleeve and the conductive sleeve from rusting.
[0036] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.
Claims
1. A lightning protection and grounding connection structure for structural steel bars in an assembled building, comprising upper structural steel bars, a grouting sleeve made of a conductive material, lower structural steel bars and a conductive sleeve; characterized in that: The upper structural steel bar is threadedly connected to the grouting sleeve or / and welded and embedded in the upper prefabricated component; the lower structural steel bar is threadedly connected to the conductive sleeve or / and welded and embedded in the lower prefabricated component; The conductive sleeve is provided with an inverted cone-shaped positioning groove, and the bottom of the grouting sleeve is provided with a positioning boss protruding from the surface of the upper prefabricated component and matching the positioning groove; The exposed end of the lower structure steel bar is inserted into the inner cavity of the grouting sleeve, and molten tin liquid is injected into the inner cavity to form an isolation layer. After the isolation layer is condensed, grouting material is further injected into the inner cavity.
2. The connection structure for lightning protection and grounding of structural steel bars in prefabricated buildings according to claim 1, characterized in that: The outer wall of the exposed end of the grouting sleeve is also provided with a clamping flange, and a sealing ring is also provided between the clamping flange and the edge of the conductive sleeve.
3. The connection structure for lightning protection and grounding of structural steel bars in prefabricated buildings according to claim 1 is characterized in that: The gap between the upper prefabricated component and the lower prefabricated component is filled with mortar.
4. According to claim 1, the connection structure for lightning protection and grounding of structural steel bars in prefabricated buildings is characterized by: A conical guide hole is provided at the bottom of the inner cavity of the grouting sleeve, and the minimum diameter of the guide hole is smaller than the inner diameter of the grouting sleeve.
5. The connection structure for lightning protection and grounding of structural steel bars in an assembled building according to claim 1, characterized in that: The upper prefabricated component is provided with a grouting hole and an overflow hole which are communicated with the inner cavity of the grouting sleeve, and the overflow hole is located on the top side of the grouting sleeve.
6. The connection structure for lightning protection and grounding of structural steel bars in prefabricated buildings according to claim 1, characterized in that: The grouting sleeve and the conductive sleeve are both made of iron material, and their surfaces are both galvanized.