Building construction reinforcing steel bar connector and reinforcing steel bar butt joint method

Abstract

The invention relates to the technical field of connectors, and discloses a building construction steel bar connector and a steel bar butt joint method.The connector comprises an outer sleeve, an inner sleeve and a pin pipe; the pin pipe is of a tubular structure, threaded teeth are arranged on the inner wall of the pin pipe, and open grooves are formed in the two ends of the pin pipe in the axis direction. The pin pipe sleeves the to-be-connected part of the steel bar a and the steel bar b; the outer sleeve front section is close to a to-be-connected part, and an annular tooth groove is formed in the inner wall of the outer sleeve The rear section of the inner sleeve is close to a to-be-connected part, and annular teeth matched with the annular tooth grooves are arranged on the outer wall of the rear section of the inner sleeve; the outer sleeve and the inner sleeve are simultaneously close to each other oppositely from the two ends of the pin pipe under external force and are sleeved outside the pin pipe until the pin pipe is meshed and fixedly connected, the rear section of the outer sleeve and the front section of the inner sleeve extrude the pin pipe in the process to enable the open slot to deform, and the reinforcing steel bar to be connected is locked. According to the invention, connection and fixation of prefabricated parts or steel bar parts can be realized quickly and conveniently.

Description

Technical Field

[0001] The invention relates to the technical field of connection joints, and in particular to a steel bar joint for building construction and a steel bar butt connection method. Background Art

[0002] At present, the steel bar engineering of building structure construction has gradually changed from the connection of single steel bars to the connection between steel bar components. In particular, modular steel bar components and prefabricated structures are widely used in the construction of infrastructure such as roads and bridges. Under the premise of ensuring the strength of the steel bars after connection, improving the efficiency of rapid connection between structural steel bars is the main demand of each construction project. At present, the steel bar connection methods include binding, mechanical connection, welding, etc. Among them, mechanical connection has been widely promoted. The connection forms of joints and sleeves are different and have their own characteristics. However, there are also some defects in their use. The straight screw sleeve is cumbersome to use and is effectively used for the extension of a single steel bar; the double screw sleeve is cumbersome to install and inefficient; the grouting sleeve is difficult to ensure the internal connection after construction.

[0003] In current on-site construction, a steel bar joint product is needed that can be used for connecting various steel bars, prefabricated components and steel bar parts. Summary of the invention

[0004] In view of this, the present invention provides a steel bar joint and a steel bar butt connection method for construction, which can quickly and conveniently achieve the connection and fixation of prefabricated components or steel bar parts through a purely mechanical structure without preprocessing the steel bars.

[0005] The present invention is realized by the following technical scheme: a construction steel bar joint, which is arranged at the place where steel bars a and steel bars b on the same line are to be connected, and the joint comprises an outer sleeve, an inner sleeve and a pin pipe; the pin pipe is a tubular structure, and its inner wall is provided with threaded teeth, and both ends of the pin pipe are provided with open grooves along the axial direction; the pin pipe is sleeved on the place where steel bars a and steel bars b are to be connected; the outer sleeve is sleeved on the outside of the steel bar b, the outer sleeve is composed of front and rear sections, the front section of the outer sleeve is close to the place to be connected, and the inner wall of the front section of the outer sleeve is provided with an annular tooth groove; the inner sleeve is sleeved on the outside of the steel bar a, the inner sleeve is composed of front and rear sections, the rear section of the inner sleeve is close to the place to be connected, and the outer wall of the rear section of the inner sleeve is provided with annular teeth matching the annular tooth groove; during installation, the outer sleeve and the inner sleeve are subjected to external force and approach each other from both ends of the pin pipe at the same time, and are sleeved on the outside of the pin pipe, until the front section of the outer sleeve and the rear section of the inner sleeve are meshed and fixed, and during the process, the rear section of the outer sleeve and the front section of the inner sleeve squeeze the pin pipe to deform its open groove, thereby locking the steel bars a and the steel bars b.

[0006] Furthermore, the inner wall of the rear section of the outer sleeve is a conical surface, and the front section of the outer sleeve is connected to the large diameter end of the rear section of the outer sleeve; the inner walls of the front section and the rear section of the inner sleeve are both conical surfaces, the small diameter end of the rear section of the inner sleeve is connected to the large diameter end of the front section of the inner sleeve, and the cone half angle of the inner wall of the front section of the inner sleeve is larger than the cone half angle of the inner wall of the rear section of the inner sleeve; the pin tube is surrounded by two pin pieces to form a tubular structure, and the pin piece is composed of three sections: front, middle and rear. The front section and rear section of the pin piece are both provided with open grooves along the axial direction, and the outer wall of the front section of the pin piece and the outer wall of the rear section of the pin piece are both semi-conical surfaces and are respectively interference fit with the inner wall of the front section of the inner sleeve and the inner wall of the rear section of the outer sleeve; the outer wall of the middle section of the pin piece is a semi-cylindrical surface that fits with the inner wall of the rear section of the inner sleeve, and the two ends of the middle section of the pin piece are respectively connected to the large diameter ends of the front section of the pin piece and the rear section of the pin piece.

[0007] Furthermore, the rear section of the inner sleeve is evenly provided with a plurality of notches along the axial direction. During the process of meshing and fixing the inner wall of the front section of the outer sleeve and the outer wall of the rear section of the inner sleeve, the notches are gradually deformed, and the rear section of the inner sleeve locks the steel bars a and b by squeezing the middle section of the pin sheet.

[0008] Furthermore, the notches are divided into short notches and long notches of different lengths, there are four short notches and four long notches respectively, and the short notches and the long notches are evenly spaced and arranged.

[0009] Furthermore, a groove is provided on the outer wall surface of the semi-cylindrical surface of the pin piece for accommodating the elastic ring.

[0010] A method for butt jointing steel bars in construction, using the joint described above, the butt jointing method is as follows: step one: an outer sleeve is inserted into the steel bar b to be connected and away from the end of the steel bar b, a pin tube is inserted into the end of the steel bar b, and the end of the steel bar b is located in the middle of the pin tube; the front end of the inner sleeve is inserted into the steel bar a to be connected and away from the end of the steel bar a, and the steel bar a moves toward the end of the steel bar b until the steel bar a is inserted into the pin tube and abuts against the steel bar b; step two: the inner and outer sleeves are moved toward the middle of the pin tube, and are respectively sleeved onto the outside of the pin tube from both ends of the pin tube, and at the same time, the front section of the outer sleeve is sleeved onto the rear section of the inner sleeve and fully meshed with it until it is fixedly connected. During the process, the rear section of the outer sleeve and the front section of the inner sleeve squeeze the pin tube to deform its open groove, thereby locking the steel bars a and the steel bars b.

[0011] Furthermore, step one can be replaced by the following process: the outer sleeve is inserted into the steel bar b to be connected and is away from the end of the steel bar b, and the inner sleeve is inserted into the steel bar a to be connected and is away from the end of the steel bar a; after the steel bars a and b are abutted in place, the two pin pieces are enclosed at the place to be connected, and the two pin pieces are limited by a limit piece.

[0012] Furthermore, the rear section of the inner sleeve is evenly provided with a number of notches along the axis. In step 2, during the process of meshing and fixing the inner wall of the front section of the outer sleeve and the outer wall of the rear section of the inner sleeve, the notches are gradually deformed, and the rear section of the inner sleeve squeezes the middle section of the pin tube to lock the steel bars a and b.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The present invention is used for steel bar extension and steel bar connection products such as steel bar parts and prefabricated components. The connection and fixation of two sections of steel bars are achieved through a mechanical structure. Only one person needs to force the outer sleeve and the inner sleeve to be relatively close to each other so that the outer sleeve and the inner sleeve are meshed and fixed with each other. The two sections of steel bars to be connected are locked by deforming the opening groove of the pin piece, avoiding the phenomenon that the joint is loosened due to external force impact or elastic deformation, causing the locking failure.

[0015] 2. The present invention locks the pin piece by cooperating the conical surface structure of the inner wall of the inner and outer sleeves with the conical surface structure of the outer wall of the front and rear sections of the pin piece, and at the same time, the middle section of the pin piece is locked and squeezed by the deformation of the groove to further ensure the tightness of the connection between the steel bars a and b, thereby achieving a tight connection between the two sections of steel bars.

[0016] 3. The notches of the present invention are divided into short notches and long notches of different lengths. The short notches and long notches are evenly spaced. After being subjected to force, the notches at the rear section of the inner sleeve are deformed more evenly, ensuring that the middle section of the pin is evenly squeezed to lock the two sections of steel bars.

[0017] 4. When the present invention is used to connect and fix steel bar components, the connection can be completed only by applying force to make the inner and outer sleeves engage with each other. The operation method is simple and the implementation efficiency of the steel bar project on the construction site is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the general assembly of the present invention, wherein Figure (a) is the front view of the general assembly of the present invention, and Figure (b) is the axonometric view of the general assembly of the present invention.

[0019] Figure 2 It is a sectional view of the general assembly of the present invention.

[0020] Figure 3 Figure 1 is a schematic diagram of an outer casing, wherein Figure (a) is a main view of the outer casing, Figure (b) is a cross-sectional view of the outer casing, and Figure (c) is an axonometric view of the outer casing assembly.

[0021] Figure 4 Figure 1 is a schematic diagram of an inner sleeve, wherein Figure (a) is a main view of the inner sleeve, Figure (b) is a cross-sectional view of the inner sleeve, and Figure (c) is an axonometric view of the inner sleeve assembly.

[0022] Figure 5 It is a schematic diagram of a pin piece, wherein Figure (a) is a front view of the pin piece, Figure (b) is a cross-sectional view of the pin piece, and Figure (c) is an axonometric view of the pin piece.

[0023] Among them, 1-outer sleeve, A1-outer wall of the rear section of the outer sleeve, A2-annular tooth groove, A3-inner wall of the rear section of the outer sleeve, 2-inner sleeve, B1-outer wall of the front section of the inner sleeve, B2-annular tooth, B3-slot I, B4-slot II, B5-inner wall of the rear section of the inner sleeve, B6-inner wall of the front section of the inner sleeve, 3-pin, C1-outer wall of the front section of the pin, C2-groove, C3-outer wall of the rear section of the pin, C4-threaded tooth, C5-outer wall of the middle section of the pin, C6-opening groove I, C7-opening groove II, 4-rebar a, 5-rebar b. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. 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.

[0025] The present invention provides a construction steel bar joint, such as Figure 1 As shown, the joint is arranged at the place where the steel bars a4 and b5 are to be connected, the steel bars a4 and b5 are located in the same straight line, and the joint includes an outer sleeve 1, an inner sleeve 2 and a pin tube.

[0026] The pin tube is a hollow tubular structure, which is used to be fitted on the connection between the steel bars a4 and b5. The inner wall of the pin tube is provided with threaded teeth, and both ends of the pin tube are provided with open grooves along the axial direction. In this embodiment, the pin tube is assembled from two pin pieces 3, such as Figure 5 As shown, the pin piece 3 is a semi-tube sheet structure, and the pin piece 3 is composed of three sections: front, middle and rear. The inner wall of the pin piece 3 is a semi-cylindrical surface and is provided with thread teeth C4. The outer wall C1 of the front section of the pin piece and the outer wall C3 of the rear section of the pin piece are both semi-conical surfaces. The outer wall C5 of the middle section of the pin piece is a semi-cylindrical surface, and its two ends are respectively connected to the large diameter ends of the front section of the pin piece and the rear section of the pin piece; the front section and the rear section of the pin piece are respectively provided with an open groove IC6 and an open groove ⅡC7 along the axial direction, and the open groove IC6 and the open groove ⅡC7 are respectively located on the intersection line between the front section of the pin piece and the rear section of the pin piece and their symmetry plane. Two pin pieces 3 are surrounded to form a hollow tubular structure, and the tubular structure is shaped like a shuttle; the tubular structure is sleeved on the part where the steel bars a4 and the steel bars b5 are to be connected, and the part to be connected is located in the middle of the pin piece 3. The outer wall surface of the semi-cylindrical surface of the pin piece 3 is provided with a groove, which can be used to place an elastic ring, and the elastic ring can be provided with an opening for easy installation.

[0027] like Figure 3 As shown, the outer sleeve 1 is for the steel bar b5 to be inserted and is sleeved outside the steel bar b5. The outer sleeve 1 consists of a front section and a rear section. The front section of the outer sleeve is close to the to-be-connected portion and is a cylindrical structure. The inner wall of the front section of the outer sleeve is provided with an annular tooth groove A2. The rear section of the outer sleeve is a conical sleeve structure. The inner wall A3 of the rear section of the outer sleeve and the outer wall A1 of the rear section of the outer sleeve are both conical surfaces. The front section of the outer sleeve is connected to the large diameter end of the rear section of the outer sleeve.

[0028] like Figure 4 As shown, the inner sleeve 2 is for the steel bar a4 to be inserted and sleeved outside the steel bar a4. The inner sleeve 2 is composed of a front section and a rear section. The rear section of the inner sleeve is close to the to-be-connected portion. The inner wall of the inner sleeve 2 adopts a two-stage tapered sleeve, that is, the inner wall B6 of the front section of the inner sleeve and the inner wall B5 of the rear section of the inner sleeve are both conical surfaces; the outer wall B1 of the front section of the inner sleeve is a conical surface, the small diameter end of the rear section of the inner sleeve is connected to the large diameter end of the front section of the inner sleeve, the cone half angle of the inner wall B6 of the front section of the inner sleeve is greater than the cone half angle of the inner wall B5 of the rear section of the inner sleeve, and the outer wall of the rear section of the inner sleeve is provided with an annular tooth B2 that cooperates with the annular tooth groove A2. During installation, the outer sleeve 1 and the inner sleeve 2 are subjected to external force and approach each other from the two ends of the pin piece 3 and are sleeved outside the pin piece 3 until the front section of the outer sleeve and the rear section of the inner sleeve are engaged and fixed. During the process, the rear section of the outer sleeve and the front section of the inner sleeve squeeze the pin piece 3 to deform its opening grooves IC6 and IC7, thereby locking the steel bars a4 and b5.

[0029] The rear section of the inner sleeve can be evenly provided with a number of notches along the axis direction. In this embodiment, the notches are divided into notches IB3 and notches IIB4 of different lengths, and there are four notches IB3 and IIB4 respectively. Notches IB3 and IIB4 are evenly spaced. Evenly spaced distribution means that both sides of any notch IB3 are notches IIB4, and both sides of any notch IIB4 are notches IB3, and the arc between any notch IB3 and any adjacent notch IIB4 is 45°. During the process of meshing and fixing the inner wall of the front section of the outer sleeve and the outer wall of the rear section of the inner sleeve, the notches are gradually deformed, and the rear section of the inner sleeve locks the steel bars a4 and b5 by squeezing the outer wall C5 of the middle section of the pin sheet.

[0030] The present invention provides a method for butt jointing steel bars in construction, using the above-mentioned steel bar joint, and the butt jointing method is as follows:

[0031] Step 1: The steel bars a4 and the steel bars b5 are located in the same straight line, the outer sleeve 1 is inserted into the steel bar b5 to be connected and is away from the end of the steel bar b5 (reserving space for the installation of the pin piece 3), the pin tube is inserted into the end of the steel bar b5 or the pin piece 3 that is assembled and limited by the elastic ring is inserted into the end of the steel bar b5, and the end of the steel bar b5 is located in the middle of the pin piece 3; the front end of the inner sleeve 2 is inserted into the steel bar a4 to be connected and is away from the end of the steel bar a4, and the steel bar a4 moves toward the end of the steel bar b5 until the steel bar a4 is inserted into the hollow structure formed by the two pin pieces 3 and abuts against the steel bar b5;

[0032] Alternatively, the outer sleeve 1 is inserted into the steel bar b5 to be connected and away from the end of the steel bar b5, and the inner sleeve 2 is inserted into the steel bar a4 to be connected and away from the end of the steel bar a4; after the steel bars a4 and b5 are abutted in place, the two pin pieces 3 are enclosed at the connection point, and the pin pieces 3 are limited by the elastic ring.

[0033] Step 2: Move the inner and outer sleeves toward the middle of the pin piece 3, and at the same time, respectively put them onto the outside of the pin piece 3 from both ends of the pin piece 3, the rear section of the inner sleeve abuts against the front section of the outer sleeve, and use force to make the front section of the outer sleeve put on the rear section of the inner sleeve and fully mesh with it until it is fixed. During the process, the outer wall C1 of the front section of the pin piece and the outer wall C3 of the rear section of the pin piece are respectively interference fit with the inner wall B6 of the front section of the inner sleeve and the inner wall A3 of the rear section of the outer sleeve, that is, the inner and outer sleeves squeeze the pin piece 3 so that the open groove gradually deforms, and the pin piece 3 gradually locks the steel bars a4 and b5 through the thread teeth C4, and the notch of the rear section of the inner sleeve gradually deforms, so that the rear section of the inner sleeve gradually locks the middle section of the pin piece, thereby further locking the steel bars a4 and b5.

[0034] The present invention realizes the connection and fixation of two sections of steel bars by means of a mechanical structure. The pin piece 3 squeezes and locks the steel bars at both ends through the inner and outer sleeves. The inner and outer sleeves are meshed with each other through the annular teeth B2 and the annular tooth grooves A2 to ensure that the inner and outer sleeves are fixedly connected to each other, avoiding the loosening of the joint due to external force impact or elastic deformation, resulting in the inability to lock.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A steel bar joint for construction, characterized in that: The joint is arranged at the place where the reinforcing bars a and b are to be connected on the same line, and comprises an outer sleeve, an inner sleeve and a pin tube; the pin tube is a tubular structure, the inner wall of which is provided with threaded teeth, and both ends of the pin tube are provided with open grooves along the axial direction; the pin tube is sleeved at the place where the reinforcing bars a and b are to be connected; The outer sleeve is sleeved outside the steel bar b, and the outer sleeve is composed of a front section and a rear section. The front section of the outer sleeve is close to the part to be connected, and the inner wall of the front section of the outer sleeve is provided with an annular tooth groove; the inner sleeve is sleeved outside the steel bar a, and the inner sleeve is composed of a front section and a rear section. The rear section of the inner sleeve is close to the part to be connected, and the outer wall of the rear section of the inner sleeve is provided with an annular tooth matching the annular tooth groove; During installation, the outer sleeve and the inner sleeve are subjected to external force and approach each other from both ends of the pin tube at the same time, and are sleeved outside the pin tube until the front section of the outer sleeve and the rear section of the inner sleeve are engaged and fixed. During the process, the rear section of the outer sleeve and the front section of the inner sleeve squeeze the pin tube to deform its open groove, thereby locking the steel bars a and b.

2. The construction steel bar joint according to claim 1, characterized in that: The inner wall of the rear section of the outer sleeve is a conical surface, and the front section of the outer sleeve is connected to the large diameter end of the rear section of the outer sleeve; the inner walls of the front section and the rear section of the inner sleeve are both conical surfaces, and the small diameter end of the rear section of the inner sleeve is connected to the large diameter end of the front section of the inner sleeve, and the conical half angle of the inner wall of the front section of the inner sleeve is greater than the conical half angle of the inner wall of the rear section of the inner sleeve; The pin tube is formed by two pin pieces enclosing a tubular structure. The pin piece consists of three sections: front, middle and rear. The front and rear sections of the pin piece are provided with open grooves along the axial direction. The outer walls of the front section of the pin piece and the rear section of the pin piece are both semi-conical surfaces and are interference fit with the inner walls of the front section of the inner sleeve and the rear section of the outer sleeve respectively; the outer wall of the middle section of the pin piece is a semi-cylindrical surface and fits with the inner wall of the rear section of the inner sleeve, and the two ends of the middle section of the pin piece are respectively connected to the large diameter ends of the front section of the pin piece and the rear section of the pin piece.

3. The construction steel bar joint according to claim 2, characterized in that: The rear section of the inner sleeve is evenly provided with a number of notches along the axial direction. During the process of meshing and fixing the inner wall of the front section of the outer sleeve and the outer wall of the rear section of the inner sleeve, the notches are gradually deformed, and the rear section of the inner sleeve locks the steel bars a and b by squeezing the middle section of the pin sheet.

4. The construction steel bar joint according to claim 3, characterized in that: The slots are divided into short slots and long slots of different lengths. There are four short slots and four long slots respectively, and the short slots and the long slots are evenly spaced.

5. The construction steel bar joint according to any one of claims 1 to 4, characterized in that: A groove is arranged on the outer wall of the semi-cylindrical surface of the pin piece for accommodating the elastic ring.

6. A method for butt jointing steel bars in construction, characterized in that: The joint according to any one of claims 1 to 5 is used, and the butt joint method is as follows: Step 1: The outer sleeve is inserted into the steel bar b to be connected and away from the end of the steel bar b, and the pin tube is inserted into the end of the steel bar b, and the end of the steel bar b is located in the middle of the pin tube; The front end of the inner sleeve is inserted into the steel bar a to be connected and moves away from the end of the steel bar a, and the steel bar a moves toward the end of the steel bar b until the steel bar a is inserted into the pin tube and abuts against the steel bar b; Step 2: Move the inner and outer sleeves to the middle of the pin tube, and respectively put them on the outside of the pin tube from both ends of the pin tube. At the same time, the front section of the outer sleeve is put on the rear section of the inner sleeve and fully engages with it until it is fixed. During the process, the rear section of the outer sleeve and the front section of the inner sleeve squeeze the pin tube to deform its open groove, thereby locking the steel bars a and b.

7. The method for butting steel bars in construction as claimed in claim 6, characterized in that: Step one can be replaced by the following process: the outer sleeve is inserted into the steel bar b to be connected and is away from the end of the steel bar b, and the inner sleeve is inserted into the steel bar a to be connected and is away from the end of the steel bar a; after the steel bars a and b are abutted in place, the two pin pieces are enclosed at the connection point, and the two pin pieces are limited by a limit piece.

8. The method for butting steel bars in construction as claimed in claim 6 or 7, characterized in that: The rear section of the inner sleeve is evenly provided with a number of notches along the axis. In step 2, during the process of meshing and fixing the inner wall of the front section of the outer sleeve and the outer wall of the rear section of the inner sleeve, the notches are gradually deformed, and the rear section of the inner sleeve squeezes the middle section of the pin tube to lock the steel bars a and b.

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