A large diameter general-purpose threaded steel structure easy to weld

Abstract

The utility model discloses an easy welding's large diameter general thread steel structure, including adapter, connecting head and stop piece, the inside filling of adapter has fixed block, and the both ends of adapter end portion and located fixed block are provided with connecting area respectively, the connecting head movable setting in connecting area, the connecting head is cooperated with the threaded steel of waiting to weld, to be used for the end of temporarily clamping and fixing threaded steel of waiting to weld, the stop piece sets up in connecting area, the stop piece is connected with fixed block, and the connecting head movable sleeve sets up on stop piece, and the connecting head is along stop piece radial movement under the extrusion of threaded steel of waiting to weld. The utility model discloses utilizing the connecting head of adapter two ends to be suitable for the threaded steel of different size and carry out quick fixing, and the connecting head opens under the extrusion of threaded steel and exposes the gap, thereby facilitating the welding rod insertion and welding, and the whole operation is simple and convenient.

Description

Technical Field

[0001] This utility model relates to the field of threaded steel lap splicing technology, and in particular to a large-diameter universal threaded steel structure that is easy to weld. Background Technology

[0002] In fields such as building construction and bridge construction, the connection of large-diameter threaded steel bars (typically ≥25mm in diameter) is a critical step in structural construction, directly affecting the overall load-bearing capacity and safety of the structure. Currently, the connection methods for large-diameter threaded steel bars mainly include mechanical connections and welded connections. Among them, mechanical connections are mainly based on sleeve extrusion and threaded connections. However, mechanical connections have extremely high requirements for thread precision and are costly. Large-diameter threaded steel bars are heavy and rigid, and are prone to axial offset or radial misalignment during manual alignment, resulting in uneven welds and affecting connection strength. They are not suitable for temporary on-site adjustments. Furthermore, they require temporary fixation with external clamps before welding, which is time-consuming to install and remove. The threaded steel bars are also prone to shifting during welding due to clamp loosening. Moreover, when manually controlling the weld gap, the gap is prone to being too large or too small, resulting in insufficient weld penetration or excessive burn-through, affecting the reliability of the connection. Utility Model Content

[0003] The purpose of this utility model is to provide an easy-to-weld large-diameter universal threaded steel structure in order to solve the above-mentioned problems.

[0004] This utility model achieves the above objectives through the following technical solutions: A weldable large-diameter universal threaded steel structure includes an adapter, a connector, and a limiting member. The adapter is filled with a fixing block, and its ends, located at both ends of the fixing block, form connection areas. The connector is movably disposed within the connection area and cooperates with the threaded steel to be welded for temporarily securing the end of the threaded steel. The limiting member is disposed within the connection area and is connected to the fixing block. The connector is movably sleeved on the limiting member. Under the pressure of the threaded steel to be welded, the connector moves radially along the limiting member. After the threaded steel to be welded is inserted into the position, its end abuts against the limiting member, forming a gap for welding between the limiting member, the connector, and the threaded steel.

[0005] Preferably, the adapter is an adapter sleeve, the interior of which is integrally formed with the fixing block; the two end faces of the fixing block form annular connection areas with the inner wall of the adapter sleeve, which are used to accommodate the connector and the limiting component.

[0006] Preferably, the connector includes several arc-shaped connecting seats, which together form a circular locking area for fitting the outer circumferential surface of the threaded steel to be welded; the arc-shaped connecting seats are movably disposed on the end face of the fixed block and movably sleeved on the limiting member, and can move synchronously along the radial direction of the limiting member.

[0007] Preferably, the end face of the fixing block is provided with a dovetail groove corresponding to the bottom of the arc-shaped connecting seat. The bottom of the arc-shaped connecting seat is dovetail-shaped and slides with the dovetail groove to restrict the circumferential rotation of the arc-shaped connecting seat and only allow radial sliding.

[0008] Preferably, the limiting component includes a limiting head and a guide rod; the guide rod is evenly spaced along the circumference of the limiting head, and the arc-shaped connecting seat is movably sleeved on the guide rod, thereby achieving radial movement guidance through the guide rod.

[0009] Preferably, a compression spring is fitted on the guide rod, with one end connected to the arc-shaped connecting seat and the other end connected to the inner wall of the adapter sleeve; when the connector moves radially under the pressure of the threaded steel, the compression spring compresses and stores elastic potential energy, and drives the connector to reset after the threaded steel is removed.

[0010] Preferably, the end of the limiting head extends outward to provide a frustum-shaped welding part, the diameter of which is smaller than the diameter of the end near the limiting head; the conical surface of the welding part abuts against the end face of the threaded steel to be welded, ensuring the axial positioning of the threaded steel, and together with the connector and the outer peripheral surface of the threaded steel, forming an annular welding gap.

[0011] The beneficial effects of this utility model are as follows: 1. This utility model utilizes a connector to enclose and secure the threaded steel bar through an arc-shaped connecting seat, and with the axial positioning of the limiting component, it achieves rapid alignment of the threaded steel bar without the need for external clamps; 2. The connector of this utility model can move radially along the limiting member and can be adjusted by a compression spring to adapt to large-diameter threaded steel bars of different specifications within the design range; 3. This utility model utilizes the frustum-shaped structure of the welding part to abut against the end of the threaded steel bar, forming a uniform annular welding gap to ensure uniform weld and consistent penetration depth; 4. The overall structure of this utility model is simple. Temporary fixation can be completed simply by inserting the threaded steel bar into the connection area, which reduces the intensity of manual operation and improves welding efficiency. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the combined state of the connector and the limiting component of this utility model.

[0015] The annotations in the attached figures are explained as follows: 1. Adapter; 2. Connector; 3. Limiting head; 4. Welding part; 5. Guide rod; 6. Compression spring. Detailed Implementation

[0016] The following is in conjunction with the appendix Figure 1-2 The technical solution of this utility model will be further explained below: like Figure 1 and Figure 2 As shown, an easily weldable large-diameter universal threaded steel structure includes an adapter 1, a connector 2, and a limiting member. The adapter 1 is internally filled with a fixing block, and connection areas are respectively provided at the ends of the adapter 1 and at both ends of the fixing block. In other words, the adapter 1 serves as the main load-bearing component of the overall structure, with the fixing block inside to enhance structural strength. The fixing block divides the interior of the adapter 1 into two independent connection areas for installing two sets of connectors 2 and limiting members, corresponding to two threaded steel bars to be welded.

[0017] Specifically, such as Figure 1 As shown, the adapter 1 is an adapter sleeve. The interior of the adapter sleeve and the fixing block are integrally formed. The two end faces of the fixing block form connection areas with the inner wall of the adapter sleeve. That is, the adapter 1 is a cylindrical adapter sleeve, and the fixing block is a solid block filled inside the adapter sleeve. It is integrally formed with the adapter sleeve by casting or forging to avoid stress concentration caused by welding. The two end faces of the fixing block form an annular connection area with the inner wall of the adapter sleeve, which is perpendicular to the axis of the adapter sleeve. That is, the space enclosed by the inner wall of the adapter sleeve, the end faces of the fixing block, and the outer wall of the limiting member. The axial length of the connection area is 50-100mm, which can be adjusted according to the diameter of the threaded steel to ensure that the connector 2 has sufficient room to move.

[0018] The one-piece molding structure improves the overall rigidity of the adapter 1 and avoids centering deviation caused by structural deformation during welding of large-diameter threaded steel. The annular connection area provides installation space for the connector 2 and the limiting component, while limiting the axial displacement of the connector 2. The axial movement range of the connector 2 is limited by the axial length of the connection area, preventing the connector 2 from coming out of the adapter 1.

[0019] Among them, such as Figure 1 and Figure 2As shown, the connector 2 is movably disposed within the connection area. The connector 2 mates with the threaded steel bar to be welded to temporarily secure the end of the threaded steel bar. That is, the connector 2 is movably disposed within the connection area, and its inner wall can be provided with anti-slip textures matching the external thread of the threaded steel bar or a smooth inner wall. It secures the threaded steel bar through friction. When the threaded steel bar to be welded is inserted from the end of the adapter 1, the connector 2 moves radially outward along the limiting member under the compression of the threaded steel bar, achieving temporary securing of the threaded steel bar by utilizing the friction between the connector 2 and the threaded steel bar and the supporting force of the limiting member.

[0020] Specifically, such as Figure 1 and Figure 2 As shown, the connector 2 includes several arc-shaped connecting seats. These arc-shaped connecting seats collectively form a circular locking area for securing the threaded steel bar to be welded. The arc-shaped connecting seats are movably disposed on the end face of the fixing block and are movably fitted onto the limiting member. In other words, the connector 2 consists of 3-4 arc-shaped connecting seats. The central angle of a single arc-shaped connecting seat is 90°-120°; it is 120° for 3 connecting seats and 90° for 4 connecting seats. When combined, they form a complete circular locking area with an inner diameter slightly smaller than the minimum design diameter of the threaded steel bar to be welded, ensuring that the connector 2 can apply a pre-tightening force to the threaded steel bar in the initial state. The bottom of the arc-shaped connecting seat is connected to the end face of the fixing block via a sliding pair.

[0021] When the threaded steel bar to be welded is inserted into the circular locking area, its outer wall presses against the inner wall of each arc-shaped connecting seat, forcing the arc-shaped connecting seat to move radially outward along the sliding pair of the fixed block end face and the guide rod 5 of the limiting member. Each connecting seat moves synchronously to ensure that the circular locking area is always concentric until the end of the threaded steel bar abuts against the limiting member.

[0022] Among them, such as Figure 2 As shown, the end face of the fixing block is provided with a dovetail groove corresponding to the bottom of the arc-shaped connecting seat, and the bottom of the arc-shaped connecting seat is dovetail-shaped. The arc-shaped connecting seat is slidably disposed in the dovetail groove. That is, the side of the end face of the fixing block facing the connection area is machined with a dovetail groove, the number of dovetail grooves is the same as the number of arc-shaped connecting seats, and they are evenly distributed along the circumference of the end face of the fixing block. The included angle between adjacent dovetail grooves is the same as the central angle of the arc-shaped connecting seat. The bottom of the arc-shaped connecting seat is machined into a dovetail-shaped slider that matches the dovetail groove. The cross-section is an isosceles trapezoid, with the upper base wider than the lower base to prevent detachment. The cooperation between the dovetail groove and the dovetail-shaped slider provides stable radial guidance for the arc-shaped connecting seat, preventing the connecting seat from tilting or shifting under the extrusion of the threaded steel, ensuring that the circular locking area is always coaxial with the adapter 1, and improving the alignment accuracy. At the same time, the dovetail structure can withstand a large radial force, preventing the connecting seat from falling off the fixing block.

[0023] Among them, such as Figure 1 and Figure 2As shown, the limiting member is disposed within the connection area. The limiting member is connected to the fixing block, and the connecting head 2 is movably sleeved on the limiting member. Under the pressure of the threaded steel bar to be welded, the connecting head 2 moves radially along the limiting member. After the threaded steel bar to be welded is inserted into the connection area, the end of the threaded steel bar to be welded abuts against the limiting member, and a welding gap is formed between the limiting member, the connecting head 2, and the threaded steel bar to be welded. That is, one end of the limiting member is fixedly connected to the fixing block, and the other end extends into the connection area. The connecting head 2 is movably sleeved on the limiting member, limiting the connecting head 2 to move only radially, not axially. The threaded steel bar to be welded is inserted axially along the connecting head 2, and its end gradually presses the connecting head 2 to move radially until the end of the threaded steel bar abuts against the end face of the limiting member. At this time, the connecting head 2 is in contact with the outer wall of the threaded steel bar under the support of the limiting member, and an annular welding gap is formed between the outer wall of the limiting member, the inner wall of the connecting head 2, and the outer wall of the threaded steel bar.

[0024] Specifically, such as Figure 2 As shown, the limiting component includes a limiting head 3 and guide rods 5 arranged at uniform intervals along the circumference of the limiting head 3 and corresponding one-to-one with the arc-shaped connecting seats. The arc-shaped connecting seats are movably sleeved on the guide rods 5. That is, the limiting component includes a limiting head 3 and guide rods 5. The limiting head 3 is a cylindrical block, one end of which is fixedly connected to a fixed block. The guide rods 5 are cylindrical smooth rods, the number of which is the same as the number of arc-shaped connecting seats, and are evenly spaced along the circumference of the limiting head 3. One end of the guide rod 5 is welded perpendicularly to the end face of the limiting head 3, and the other end extends into the connection area, with its length matching the axial length of the connection area, ensuring that the connecting head 2 does not come out after being sleeved.

[0025] The arc-shaped connector has a through hole in the middle, with a diameter 0.5-1mm larger than that of the guide rod 5. The through hole is fitted onto the guide rod 5 to form a sliding fit. The guide rod 5 and the dovetail groove together guide the connector 2, further ensuring that the connector 2 can only move radially.

[0026] Among them, such as Figure 2 As shown, a compression spring 6 is fitted onto the guide rod 5. One end of the compression spring 6 is connected to the arc-shaped connecting seat, and the other end is connected to the inner wall of the adapter 1. In other words, the guide rod 5 is fitted with a compression spring 6, one end of which is welded or snapped to the inner end face of the arc-shaped connecting seat, facing the end face of the limiting head 3. The other end is welded to the inner wall of the adapter 1 or fixed by a retaining ring. Initially, the compression spring 6 is in a naturally extended or slightly compressed state, and the arc-shaped connecting seat is in the innermost radial position under the spring tension, i.e., the inner diameter of the circular locking area is the smallest. When the threaded steel to be welded is inserted, the connecting seat moves radially outward, the compression spring 6 is compressed, and the arc-shaped connecting seats separate and spaced apart, facilitating welding.

[0027] Among them, such as Figure 2 As shown, the end of the limiting head 3 extends outward with a frustum-shaped welding part 4, and the diameter of the end of the welding part 4 is smaller than the diameter of the end near the end of the limiting head 3. The welding part 4 abuts against the end of the threaded steel bar to be welded. That is to say, when the end of the threaded steel bar to be welded abuts against the conical surface of the welding part 4, the conical surface plays an automatic centering role. Even if there is a slight eccentricity when the threaded steel bar is inserted, it will automatically adjust to coaxiality under the guidance of the conical surface. During welding, a triangular cross-section welding pool space is formed between the conical surface of the welding part 4 and the inner wall of the threaded steel bar, which facilitates the filling of welding material and improves the penetration of the weld root.

[0028] In other words, the conical surface of the welding part 4, together with the arc-shaped inner wall of the connector 2 and the outer wall of the threaded steel, forms a "V" shaped welding groove. It is composed of the conical surface, the inner wall of the connector 2 and the outer wall of the threaded steel, which meets the requirements for butt joint grooves in GB / T 985.1-2008 "Recommended Grooves for Gas Welding, Electro-Mechanical Welding, Gas Shielded Welding and High Energy Beam Welding". This makes it easier for welders to observe and operate. At the same time, the frustum-shaped structure can reduce the heat conduction to the main body of the limiting head 3 during welding, and prevent the limiting head 3 from overheating and deforming.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A large-diameter universal threaded steel structure that is easy to weld, characterized in that, include: The adapter (1) is filled with a fixing block, and the adapter (1) has a connection area at its end and at both ends of the fixing block. Connector (2), the connector (2) is movably disposed in the connection area, the connector (2) cooperates with the threaded steel to be welded to temporarily secure the end of the threaded steel to be welded; A limiting member is provided in the connection area. The limiting member is connected to the fixed block, and the connecting head (2) is movably sleeved on the limiting member. The connecting head (2) moves radially along the limiting member under the extrusion of the threaded steel to be welded. After the threaded steel bar to be welded is inserted into place, the end of the threaded steel bar to be welded abuts against the limiting member, and a gap for welding is formed between the limiting member, the connector (2) and the threaded steel bar to be welded.

2. The easily weldable large-diameter general-purpose threaded steel structure as described in claim 1, characterized in that, The adapter (1) is an adapter sleeve. The interior of the adapter sleeve and the fixing block are integrally formed. The two end faces of the fixing block form a connection area with the inner wall of the adapter sleeve.

3. The easily weldable large-diameter general-purpose threaded steel structure as described in claim 1, characterized in that, The connector (2) includes several arc-shaped connectors, which together form a circular clamping area for clamping the threaded steel to be welded. The arc-shaped connectors are movably disposed on the end face of the fixed block and are movably sleeved on the limiting member.

4. The easily weldable large-diameter general-purpose threaded steel structure as described in claim 3, characterized in that, The end face of the fixing block is provided with a dovetail groove corresponding to the bottom of the arc-shaped connecting seat, and the bottom of the arc-shaped connecting seat is shaped like a dovetail. The arc-shaped connecting seat is slidably disposed in the dovetail groove.

5. The easily weldable large-diameter general-purpose threaded steel structure as described in claim 3, characterized in that, The limiting component includes a limiting head (3) and guide rods (5) evenly spaced along the circumference of the limiting head (3) and arranged in a one-to-one correspondence with the arc-shaped connecting seat. The arc-shaped connecting seat is movably sleeved on the guide rods (5).

6. The easily weldable large-diameter general-purpose threaded steel structure as described in claim 5, characterized in that, A compression spring (6) is fitted on the guide rod (5). One end of the compression spring (6) is connected to the arc-shaped connecting seat, and the other end of the compression spring (6) is connected to the inner wall of the adapter (1).

7. The easily weldable large-diameter general-purpose threaded steel structure as described in claim 5, characterized in that, The end of the limiting head (3) extends outward and is provided with a frustum-shaped welding part (4), and the end diameter of the welding part (4) is smaller than the diameter of the end of the limiting head (3), and the welding part (4) abuts against the end of the threaded steel to be welded.

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