Special wrench for connecting component reinforcing steel bars through straight thread combined connecting piece

Abstract

The utility model relates to a special spanner for a straight thread combined connecting piece connecting component reinforcing steel bar, which is characterized by comprising a rotating head and a handle, the rotating head is provided with three sections of stepped holes with diameters gradually reduced, the diameters of the stepped holes are a polygonal prismatic surface, a middle section hole and a small-diameter hole in sequence from large to small, the side wall of the rotating head is provided with two sections of stepped openings, and the handle is connected with the handle. The stepped openings are respectively a small-diameter section opening and a middle section and prismatic surface section opening, the opening width of the small-diameter section opening is the same as the diameter of the small-diameter hole, and the opening widths of the middle section and the prismatic surface section opening are the same as the diameter of the middle section hole; by means of the special structural design, the connecting efficiency of the straight thread combined connecting piece is greatly improved, steel bar connection of double-layer and multi-layer steel bar cages with compact steel bar distribution can be achieved, and whether the installation tightening torque of the straight thread combined connecting piece is in place or not can be detected.

Description

Technical Field

[0001] The utility model relates to the technical field of steel bar connection, in particular to a special wrench for connecting components with straight thread combined connectors. Background Art

[0002] Some large-scale building structures often utilize a componentized, modular construction approach. For example, the support columns of a large warehouse are prefabricated at a prefabrication plant, then transported to the site for hoisting and rebar connection. Another example is the construction of the nuclear island of a large nuclear power plant, where rebar is first bundled into a steel cage or mesh, then hoisted and rebar connected.

[0003] Connecting these components requires specialized rebar connection products. Star Jianmao's patented U-sleeve rebar threaded connector, ZL202223592036.2, perfectly meets the requirements for rebar connections in this application. To use this product, the outer U-sleeve is threaded onto the inner sleeve to complete the rebar connection.

[0004] However, in the steel bar connection work of the component steel bars, if the traditional open-end wrench is used for tightening, the efficiency is low. Moreover, if a double-layer longitudinal reinforcement cage with compact reinforcement is connected, the axial spacing of the longitudinal bars in the same layer and the axial spacing of the longitudinal bars in the front and rear layers are only about 200 mm. When the wrench passes through the front layer of steel bars to screw the U-sleeve steel bar threaded connector of the rear layer or a straight thread combination connector of a similar structure, the gap between the connected steel bars and the left, right, front and rear adjacent longitudinal bars is small, resulting in limited rotation angle, making it difficult to complete the steel bar connection work. The head of the traditional large-open pipe wrench is large in size, and it is difficult to work in such a small gap operating environment. In addition, the jaws of the pipe wrench are stuck on the outer diameter surface of the outer connection sleeve and are prone to slipping, making the operation unsafe. In addition, the external sleeve with a polygonal outer surface is rotated by holding the outer edge plane of the external sleeve with a traditional flat-blade wrench. After each rotation of a certain angle, the wrench must be withdrawn from the direction perpendicular to the axis of the longitudinal reinforcement, and then inserted again at another angle. The flat-blade of the wrench is clamped to the other angle plane of the external sleeve, which is constrained by the gap between the previous layer of longitudinal reinforcement. The efficiency of this rotation operation cannot meet the connection efficiency requirements of the component steel bars. Utility Model Content

[0005] The utility model greatly improves the connection efficiency of the straight thread combination connector through its special structural design, and can realize the steel bar connection of components such as double-layer and multi-layer steel cages with compact reinforcement, and can also check whether the installation tightening torque of the straight thread combination connector is in place.

[0006] In order to solve the above technical problems, the technical solutions provided by the present invention are as follows:

[0007] A special wrench for connecting steel bars with straight thread combination connectors, characterized in that: it includes a rotating head and a handle, the rotating head is provided with three stepped holes with decreasing diameters, the diameters of the stepped holes are, from large to small, a polygonal prism surface, a middle section hole and a small diameter hole, two stepped openings are provided on the side wall of the rotating head, the stepped openings are respectively a small diameter section opening, a middle section and a prism surface section opening, the opening width of the small diameter section opening is the same as the diameter of the small diameter hole, the opening width of the middle section and the prism surface section opening is the same as the diameter of the middle section hole, the rotating head is provided with a handle hole, the handle is provided with a handle connecting shaft, the handle connecting shaft is inserted into the handle hole for connecting the rotating head to the handle;

[0008] The straight thread combination connector includes a first connecting sleeve, an external sleeve and a second connecting sleeve. The external sleeve is sleeved on the first connecting sleeve. The first connecting sleeve is fixed on the connecting steel bar. The second connecting sleeve is fixed on another connecting steel bar. The connecting steel bar can be inserted into the opening of the small diameter section and fixed to the small diameter hole. The first connecting sleeve can be inserted into the openings of the middle section and the prismatic section and fixed to the middle section hole. The convex tooth surface of the outer wall of the external sleeve and the concave tooth surface of the inner wall of the polygonal prism form a clearance fit connection. The rotating head drives the external sleeve to rotate so that the external sleeve and the second connecting sleeve are threadedly connected. The number of concave tooth surfaces on the inner wall of the polygonal prism is twice the number of convex tooth surfaces on the outer wall of the external sleeve.

[0009] The straight thread combination connector is a special wrench for connecting parts and steel bars, wherein: the rotating head and the handle are fixed by threaded connection, plug-in connection or welding connection.

[0010] The straight thread combination connector is a special wrench for connecting steel bars, wherein: after the rotating head is connected and fixed to the handle, the distance from the outermost end of the handle to the outer wall of the rotating head is between 6cm and 15cm.

[0011] The straight thread combination connector is a special wrench for connecting parts and steel bars, wherein: a torque measuring rod mounting hole is provided on the handle for the torque measuring rod to be inserted and fixed.

[0012] The straight thread combination connector is a special wrench for connecting steel bars, wherein the material hardness of the rotating head is not less than HRC25.

[0013] The straight thread combination connector is a special wrench for connecting parts and steel bars, wherein: the intersection of the stepped opening and the outer wall of the rotating head is symmetrically chamfered to facilitate the insertion of the connecting steel bars and the straight thread combination connector.

[0014] The beneficial effects of the present invention are as follows: when in use, the small diameter hole is used to leave space for connecting the steel bars and guide the rotating head to remain coaxial with the connecting steel bars. The middle hole leaves space for the first connecting sleeve. The rotating head can be inserted into the connecting steel bars and the first connecting sleeve first to further ensure that the rotating head is coaxial with the connecting steel bars, so that the polygonal prism surface of the rotating head can be easily and quickly put on the external sleeve. The concave tooth surface of the inner wall of the polygonal prism surface matches the convex tooth surface of the outer wall of the external sleeve. At this time, the installer can drive the external sleeve to rotate by turning the handle with the force of his hand, and the rotation radius of the outer end of the handle is smaller than the space surrounded by adjacent longitudinal bars. It can rotate 360° continuously, which significantly improves the joint connection of dense steel bar workstations. Connection efficiency; when the final tightening force cannot meet the requirements through manual turning, the polygonal prism surface of the rotating head can be used to select multiple angles to cooperate with the outer surface of the external sleeve, so that the handle can be oriented to the required angle position, the extended sleeve is set on the handle, and the gap between adjacent longitudinal bars is used to make a small angle rotation. It is very convenient to use the rotating head to quickly complete multiple small angle rotations along the axial movement of the steel bar by plugging and pulling out, until the required tightening force is met; when the tightening torque needs to be checked, a special force measuring wrench rod can be installed on the handle through the torque measuring rod mounting hole, the position of the force measuring wrench rod is located by the torque measuring rod mounting hole, the force measuring wrench rod is turned, and the tightening torque of the joint is measured to see if it meets the requirements. Highly efficient installation of joints facilitates the inspection of joint connection quality and meets the construction requirements of steel bar connections of multi-layer reinforcement structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a diagram showing the structure of a special wrench used to connect steel bars to straight thread combination connectors.

[0016] Figure 2 This is the main structural diagram of a special wrench for connecting steel bars with straight thread combination connectors.

[0017] Figure 3 This is a diagram showing the handle structure of a special wrench used to connect steel bars with straight thread combination connectors.

[0018] Figure 4 This is a structural diagram of the component steel bar when the rotating head is inserted.

[0019] Figure 5 Structural diagram of a straight thread combination connector when a swivel head is inserted.

[0020] Figure 6 This is a structural diagram of the straight thread combination connector when it is installed in place.

[0021] Explanation of the reference numerals: 1-rotating head; 2-handle; 3-connecting steel bar; 4-straight thread combination connector; 10-handle hole; 11-small diameter hole; 12-middle section hole; 13-polygonal prism surface; 14-small diameter section opening; 15-middle section and prism section opening; 21-torque measuring rod mounting hole; 22-handle connecting shaft; 41-first connecting sleeve; 42-external sleeve; 43-second connecting sleeve. DETAILED DESCRIPTION

[0022] Figures 1 to 6 As shown, a special wrench for connecting steel bars with straight thread combination connectors includes a rotating head 1 and a handle 2. The rotating head 1 is provided with a handle hole 10, and the handle 2 is provided with a handle connecting shaft 22. The handle connecting shaft 22 is inserted into the handle hole 10 for connecting the rotating head 1 and the handle 2. The rotating head 1 and the handle 2 are fixed by threaded connection, plug-in connection or welding. After the rotating head 1 and the handle 2 are connected and fixed, the distance from the outermost end of the handle 2 to the outer wall of the rotating head 1 is between 6cm and 15cm. A torque measuring rod mounting hole 21 is provided on the handle 2 for inserting and fixing the torque measuring rod. The material hardness of the rotating head 1 is not less than HRC25.

[0023] The rotating head 1 is provided with three sections of stepped holes with decreasing diameters. The diameters of the stepped holes are, from large to small, a polygonal prism surface 13, a middle section hole 12 and a small diameter hole 11. Two sections of stepped openings are provided on the side wall of the rotating head 1. The stepped openings are a small diameter section opening 14, a middle section and a prism section opening 15. The opening width of the small diameter section opening 14 is the same as the diameter of the small diameter hole 11, and the opening width of the middle section and the prism section opening 15 is the same as the diameter of the middle section hole 12.

[0024] The straight thread combination connector 4 includes a first connecting sleeve 41, an external sleeve 42 and a second connecting sleeve 43. The external sleeve 42 is sleeved on the first connecting sleeve 41. The first connecting sleeve 41 is fixed on the connecting steel bar 3. The second connecting sleeve 43 is fixed on another connecting steel bar 3. The connecting steel bar 3 can be inserted into the small diameter section opening 14 and fixed to the small diameter hole 11. The first connecting sleeve 41 can be inserted into the middle section and prismatic section openings 15 and fixed to the middle section hole 12. The outer wall convex tooth surface of the external sleeve 42 and the inner wall concave tooth surface of the polygonal prism surface 13 form a clearance fit connection. The rotating head 1 drives the external sleeve 42 to rotate so that the external sleeve 42 and the second connecting sleeve 43 are threadedly connected. The number of the inner wall concave tooth surfaces of the polygonal prism surface 13 is twice the number of the outer wall convex tooth surfaces of the external sleeve 42.

[0025] The intersection of the stepped opening and the outer wall of the rotating head 1 is symmetrically chamfered to facilitate the insertion of the connecting steel bar 3 and the straight thread combination connector 4.

[0026] In the embodiment, when in use, the small diameter hole 11 is used to leave space for the connecting steel bar 3 and guide the rotating head 1 to remain coaxial with the connecting steel bar 3. The middle hole 12 leaves space for the first connecting sleeve 41. The rotating head 1 can be inserted into the connecting steel bar 3 and the first connecting sleeve 41 first to further ensure that the rotating head 1 is coaxial with the connecting steel bar 3, so that the polygonal prism surface 13 of the rotating head 1 can be conveniently and quickly put on the external sleeve 42. The inner wall concave tooth surface of the polygonal prism surface 13 matches the outer wall convex tooth surface of the external sleeve 42. At this time, the installer can drive the external sleeve 42 to rotate by turning the handle 2 with the force of his hand, and the rotation radius of the outer end of the handle 2 is smaller than the space surrounded by adjacent longitudinal bars, and it can rotate 360° continuously, which significantly improves the joint connection efficiency of dense steel bar workstations. rate and a U-shaped annular surface is formed at the intersection of the two; when the final tightening force cannot meet the requirements through manual turning, the polygonal prism surface 13 of the rotating head 1 can be used to select multiple angles to cooperate with the outer surface of the external sleeve 42, so that the handle 2 can be oriented to the required angle position, and the extension sleeve is placed on the handle 2. The gap between adjacent longitudinal bars is used to rotate at a small angle, and it is very convenient to insert and remove the connecting steel bar 3 axially through the rotating head 1 to quickly complete multiple small angle turns until the required tightening force is met; when the tightening torque needs to be checked, a special force wrench rod can be installed on the handle 2 through the torque measuring rod mounting hole 21, and the position of the force wrench rod is positioned by the torque measuring rod mounting hole 21. The force wrench rod is turned and the tightening torque of the joint is measured to see if it meets the requirements. It meets the requirements of high-efficiency installation of joints, facilitates the inspection of joint connection quality, and meets the connection construction requirements of the connecting steel bar 3 of the component steel bars of the multi-layer reinforcement structure.

[0027] The above embodiments are merely illustrative of the present invention and are not intended to limit the scope of protection of the present invention. Those skilled in the art may make simple changes or substitutions based on the above embodiments without departing from the technical concept of the present invention, and these changes still fall within the scope of protection of the present invention.

Claims

1. A special wrench for connecting steel bars with straight thread combination connectors, characterized by: The invention comprises a rotating head (1) and a handle (2), wherein the rotating head (1) is provided with three stepped holes with decreasing diameters, wherein the diameters of the stepped holes are, from large to small, a polygonal prism surface (13), a middle section hole (12), and a small diameter hole (11), and the side wall of the rotating head (1) is provided with two stepped openings, wherein the stepped openings are respectively a small diameter section opening (14), a middle section and a prism surface section opening (15), wherein the opening width of the small diameter section opening (14) is the same as the diameter of the small diameter hole (11), and the opening width of the middle section and the prism surface section opening (15) is the same as the diameter of the middle section hole (12), the rotating head (1) is provided with a handle hole (10), and the handle (2) is provided with a handle connecting shaft (22), wherein the handle connecting shaft (22) is inserted into the handle hole (10) for connecting the rotating head (1) with the handle (2); The straight thread combination connector (4) comprises a first connecting sleeve (41), an external sleeve (42) and a second connecting sleeve (43), wherein the external sleeve (42) is sleeved on the first connecting sleeve (41), the first connecting sleeve (41) is fixed on the connecting steel bar (3), the second connecting sleeve (43) is fixed on another connecting steel bar (3), the connecting steel bar (3) can be inserted into the small diameter section opening (14) and fixed to the small diameter hole (11), the first connecting sleeve (41) ) can be inserted into the middle section and prismatic section opening (15) and fixed to the middle section hole (12), the outer wall convex tooth surface of the external sleeve (42) and the inner wall concave tooth surface of the polygonal prism surface (13) form a clearance fit connection, the rotating head (1) drives the external sleeve (42) to rotate, and the external sleeve (42) and the second connecting sleeve (43) are threadedly connected, and the number of the inner wall concave tooth surfaces of the polygonal prism surface (13) is twice the number of the outer wall convex tooth surfaces of the external sleeve (42).

2. A special wrench for connecting steel bars with a straight thread combination connector as claimed in claim 1, characterized in that: The rotating head (1) and the handle (2) are fixed via a threaded connection, a plug-in connection, or a welding connection.

3. A special wrench for connecting steel bars with straight thread combination connectors as claimed in claim 1, characterized in that: After the rotating head (1) and the handle (2) are connected and fixed, the distance from the outermost end of the handle (2) to the outer wall of the rotating head (1) is between 6 cm and 15 cm.

4. A special wrench for connecting steel bars with a straight thread combination connector as claimed in claim 1, characterized in that: The handle (2) is provided with a torque measuring rod mounting hole (21) for the torque measuring rod to be inserted and fixed.

5. A special wrench for connecting steel bars with straight thread combination connectors as claimed in claim 1, characterized in that: The material hardness of the rotating head (1) is not less than HRC25.

6. A special wrench for connecting steel bars with straight thread combination connectors as claimed in claim 1, characterized in that: Chamfers are symmetrically arranged at the intersection of the stepped opening and the outer wall of the rotating head (1), facilitating the insertion of the connecting steel bars (3) and the straight threaded combined connector (4).

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