Prestress tensioning support for precast concrete
By designing structures such as connecting bolts, fixing nuts and butt blocks, the problem of height difference between multiple transverse steel beams is solved, and the rapid butt and stable connection of the prestressed tension bracket of concrete prefabricated parts is realized, which simplifies the operation process and improves the connection accuracy.
Patent Information
- Application Number
- CN202422307747.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-09-20
AI Technical Summary
In the prior art, there is a difference in the horizontal height between multiple transverse steel beams, resulting in uneven internal stress of the steel bars, which requires manual adjustment and leveling, and the operation is cumbersome.
A prestressed tensioning bracket for concrete prefabricated parts is designed, using structures such as connecting bolts, fixing nuts, butt blocks and limit blocks to ensure that multiple tensioning heads are on the same horizontal plane. Through the coordination of the connecting bolts and fixing nuts, rapid butts are achieved and errors are reduced.
It realizes fast docking of multiple tensioners, with small error values, simplifies the operation process, and improves the stability and accuracy of the connection.
Smart Images
Figure CN223131022U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of concrete precast members, in particular to a prestressed tensioning bracket for concrete precast members. Background Art
[0002] In a prestressed concrete structure, before the structural member is subjected to an external load, a pressure is artificially applied to it in advance. The resulting prestressed state is used to reduce or offset the tensile stress caused by the external load, that is, by relying on the relatively high compressive strength of concrete to make up for the deficiency of its tensile strength, so as to achieve the purpose of delaying the cracking of the concrete in the tensile zone. A structure made of prestressed concrete is also called a prestressed reinforced concrete structure because the method of tensioning steel bars is used to achieve precompressive stress.
[0003] When manufacturing concrete precast members by the pretensioning method, it is necessary to tension the steel bars or steel strands in the concrete precast members. During the tensioning process, generally, transverse steel beams are arranged at both ends of the formwork as the tensioning end and the fixing end of the prestressed steel wires or steel bars. At the same time, when pulling multiple rows of steel bars or steel wires, multiple transverse steel beams need to be set. However, there is an easy horizontal height difference between the current multiple transverse steel beams, which will cause the internal stress of the steel bars to be the same. Therefore, it is necessary to provide a prestressed tensioning bracket for concrete precast members that is convenient for leveling and has a small connection error to solve the above technical problems. Summary of the Utility Model
[0004] To solve the above technical problems, the utility model provides a prestressed tensioning bracket for concrete precast members that is convenient for leveling and has a small connection error.
[0005] The prestressed tensioning bracket for concrete precast members provided by the utility model includes a tensioning steel bar, a tensioning mechanism is arranged on the outer side of the tensioning steel bar, a first connecting block and a second connecting block are respectively arranged on the outer side of the tensioning mechanism, a connecting mechanism is arranged in the inner cavity of the second connecting block, and a docking block is fixedly connected to one side of the first connecting block.
[0006] As a prestressed tensioning bracket for concrete precast members provided by the utility model, preferably, the connecting mechanism includes a connecting bolt, the connecting bolt is located in the inner cavity of the second connecting block, a fixing nut is threadedly connected to the outer side of the connecting bolt, and a connecting hole is opened in the inner cavity of the docking block.
[0007] As a prestressed tensioning bracket for concrete precast members provided by the utility model, preferably, the connecting mechanism further includes a pressing block, the pressing block is located on the outer side of the connecting bolt, and a friction pad is arranged on one side of the pressing block.
[0008] As a prestressed tensioning bracket for concrete precast members provided by the utility model, preferably, the tensioning mechanism includes a tensioning head, and a fixing hole is opened in the inner cavity of the tensioning head.
[0009] As the present utility model provides a prestressed tensioning bracket for concrete precast members, preferably, reinforcing plates are fixedly connected to one side of both the first connecting block and the second connecting block, and one side of the reinforcing plate is fixedly connected to the outer side of the tensioning head.
[0010] As the present utility model provides a prestressed tensioning bracket for concrete precast members, preferably, stiffening ribs and connecting plates are fixedly connected to both the top and the bottom of the tensioning head, and both sides of the stiffening rib are fixedly connected to one side of the connecting plate.
[0011] As the present utility model provides a prestressed tensioning bracket for concrete precast members, preferably, an auxiliary plate is fixedly connected to one side of the connecting plate.
[0012] As the present utility model provides a prestressed tensioning bracket for concrete precast members, preferably, limiting blocks are fixedly connected to both the top and the bottom of the docking block, a limiting groove is formed in the inner cavity of the second connecting block, and the outer side of the limiting block is slidably connected to the inner wall of the limiting groove.
[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0014] For this prestressed tensioning bracket for concrete precast members, the three fixing holes are on the same horizontal plane, so as to reduce the error value between multiple steel bars or steel strands passing through the fixing holes. When connecting multiple tensioning heads, the docking block at another tensioning head is clamped into the inner cavity of the second connecting block at the current tensioning head. After the docking block is clamped into the inner cavity of the second connecting block, the user can then place the connecting bolt in place, pass the connecting bolt through the connecting hole, then the user can successively put the friction pad and the pressing block on the outer side of the connecting bolt, and finally tighten the fixing nut. By setting the docking block in cooperation with the second connecting block, the two tensioning heads can be quickly docked, and the positions of the docking block and the second connecting block on the outer side of each tensioning head are the same. When multiple tensioning heads are docked, the error value is small, solving the problem that for the current prestressed tensioning heads, when multiple tensioning heads are used simultaneously, there is an easy height difference between multiple tensioning heads, and it is more troublesome for the user to manually adjust and level them. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic structural diagram of a preferred embodiment of the prestressed tensioning bracket for concrete precast members provided by the present utility model;
[0016] Figure 2 It is a schematic structural diagram of the tensioning head of the present utility model;
[0017] Figure 3 It is a schematic structural diagram of the fixing hole of the present utility model;
[0018] Figure 4 It is a structural sectional view of the second connecting block of the present utility model.
[0019] Reference numerals in the figure: 1, tensioned steel bar; 2, tensioning mechanism; 201, tensioning head; 202, fixing hole; 3, first connecting block; 4, second connecting block; 5, connecting mechanism; 501, connecting bolt; 502, fixing nut; 503, connecting hole; 504, pressing block; 505, friction pad; 6, docking block; 7, stiffening rib; 8, connecting plate; 9, auxiliary plate; 10, reinforcing plate; 11, limiting block; 12, limiting groove. Detailed implementation manners
[0020] The present utility model will be further described below in conjunction with the accompanying drawings and implementation manners.
[0021] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 , wherein Figure 1 is a schematic structural view of a preferred embodiment of the prestressed tensioning bracket for concrete precast members provided by the present utility model; Figure 2 is a schematic structural view of the tensioning head of the present utility model; Figure 3 is a schematic structural view of the fixing hole of the present utility model; Figure 4 is a structural sectional view of the second connecting block of the present utility model. A prestressed tensioning bracket for concrete precast members includes a tensioned steel bar 1, a tensioning mechanism 2 is arranged outside the tensioned steel bar 1, a first connecting block 3 and a second connecting block 4 are respectively arranged outside the tensioning mechanism 2, a connecting mechanism 5 is arranged in the inner cavity of the second connecting block 4, and a docking block 6 is fixedly connected to one side of the first connecting block 3;
[0022] The tensioning mechanism 2 includes a tensioning head 201, and a fixing hole 202 is opened in the inner cavity of the tensioning head 201;
[0023] Reinforcing plates 10 are fixedly connected to one side of both the first connecting block 3 and the second connecting block 4, and one side of the reinforcing plates 10 is fixedly connected to the outside of the tensioning head 201;
[0024] Stiffening ribs 7 and connecting plates 8 are fixedly connected to the top and bottom of the tensioning head 201 respectively, and both sides of the stiffening ribs 7 are fixedly connected to one side of the connecting plates 8;
[0025] An auxiliary plate 9 is fixedly connected to one side of the connecting plate 8.
[0026] It should be noted that by setting the reinforcement plate 10, the connection stability between the first connection block 3 and the second connection block 4 and the tension head 201 is improved. One end of the steel bar or steel strand can pass through the fixing hole 202 and then be fixed to the tension head 201. The three fixing holes 202 are on the same horizontal plane, so as to reduce the error value between multiple steel bars or steel strands passing through the fixing hole 202. By setting the stiffening rib 7 and the connecting plate 8, the structural strength of the tension head 201 is improved, which is convenient to meet the strength requirements during tensioning and convenient for users to use. By setting the auxiliary plate 9, while improving the stability of the two connecting plates 8, the structural strength of the tension head 201 is further improved.
[0027] In the specific implementation process, as Figure 1 、 Figure 2 、 Figure 3 and Figure 4 shown, the connecting mechanism 5 includes a connecting bolt 501. The connecting bolt 501 is located in the inner cavity of the second connection block 4. A fixing nut 502 is threadedly connected to the outside of the connecting bolt 501. A connecting hole 503 is opened in the inner cavity of the docking block 6;
[0028] The connecting mechanism 5 further includes a pressing block 504. The pressing block 504 is located outside the connecting bolt 501. A friction pad 505 is arranged on one side of the pressing block 504;
[0029] Limit blocks 11 are fixedly connected to both the top and bottom of the docking block 6. A limit groove 12 is opened in the inner cavity of the second connection block 4. The outside of the limit block 11 is slidably connected to the inner wall of the limit groove 12.
[0030] It should be noted that when connecting multiple tension heads 201, the connecting bolt 501 in the second connection block 4 at the current tension head 201 can be first moved out of the second connection block 4, and then the docking block 6 at another tension head 201 can be inserted into the inner cavity of the second connection block 4 at the current tension head 201. After the docking block 6 is inserted into the inner cavity of the second connection block 4, the gap between the docking block 6 and the second connection block 4 is not greater than 1.5 mm. Then the user can return the connecting bolt 501 to make the connecting bolt 501 pass through the connecting hole 503. Then the user can successively put the friction pad 505 and the pressing block 504 on the outside of the connecting bolt 501, and finally tighten the fixing nut 502. By setting the docking block 6 to cooperate with the second connection block 4, the quick docking of two tension heads 201 can be facilitated, and the positions of the docking block 6 and the second connection block 4 on the outside of each tension head 201 are the same. When multiple tension heads 201 are docked, the error value is small. By setting the limit blocks 11 and the limit grooves 12, the docking block 6 can be limited, and the connection stability between the docking block 6 and the second connection block 4 can be improved.
[0031] The working principle of a prestressed tensioning bracket for concrete precast members provided by the present utility model is as follows:
[0032] Pass one end of a reinforcing bar or a steel strand through the fixing hole 202, and then fix it to the tensioning head 201. The three fixing holes 202 are on the same horizontal plane, so as to reduce the error value between multiple reinforcing bars or steel strands passing through the fixing hole 202. When connecting multiple tensioning heads 201, the connecting bolt 501 in the second connecting block 4 at the current tensioning head 201 can be first removed from the inside of the second connecting block 4, and then the docking block 6 at another tensioning head 201 is snapped into the inner cavity of the second connecting block 4 at the current tensioning head 201. After the docking block 6 is snapped into the inner cavity of the second connecting block 4, the gap between the docking block 6 and the second connecting block 4 is not greater than 1.5 mm. Then the user can return the connecting bolt 501 to its original position, make the connecting bolt 501 pass through the connecting hole 503, and then the user can successively put the friction pad 505 and the pressing block 504 on the outside of the connecting bolt 501, and finally tighten the fixing nut 502. By setting the docking block 6 to cooperate with the second connecting block 4, the quick docking of two tensioning heads 201 can be facilitated, and the positions of the docking block 6 and the second connecting block 4 on the outside of each tensioning head 201 are the same. When multiple tensioning heads 201 are docked, the error value is small.
[0033] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.
Claims
1. A prestressed tensioning bracket for precast concrete components, characterized in that, It includes a tensioned steel bar (1), a tensioning mechanism (2) is arranged on the outer side of the tensioned steel bar (1), a first connecting block (3) and a second connecting block (4) are respectively arranged on the outer side of the tensioning mechanism (2), a connecting mechanism (5) is arranged in the inner cavity of the second connecting block (4), and a docking block (6) is fixedly connected to one side of the first connecting block (3).
2. The prestressed tension bracket for concrete precast parts according to claim 1, wherein The connecting mechanism (5) includes a connecting bolt (501), the connecting bolt (501) is located in the inner cavity of the second connecting block (4), a fixing nut (502) is threadedly connected to the outer side of the connecting bolt (501), and a connecting hole (503) is opened in the inner cavity of the docking block (6).
3. The prestressed tension bracket for concrete precast members according to claim 2, characterized in that, The connecting mechanism (5) further includes a pressing block (504), the pressing block (504) is located on the outer side of the connecting bolt (501), and a friction pad (505) is arranged on one side of the pressing block (504).
4. The prestressed tension bracket for precast concrete components according to claim 1, characterized in that, The tensioning mechanism (2) includes a tensioning head (201), and a fixing hole (202) is opened in the inner cavity of the tensioning head (201).
5. The prestressed tension bracket for precast concrete components according to claim 4, characterized in that, Reinforcing plates (10) are fixedly connected to one side of the first connecting block (3) and the second connecting block (4), and one side of the reinforcing plate (10) is fixedly connected to the outer side of the tensioning head (201).
6. The prestressed tension bracket for concrete precast parts according to claim 4, wherein, Stiffening ribs (7) and connecting plates (8) are fixedly connected to the top and bottom of the tensioning head (201), and both sides of the stiffening rib (7) are fixedly connected to one side of the connecting plate (8).
7. The prestressed tension bracket for precast concrete components according to claim 6, characterized in that, An auxiliary plate (9) is fixedly connected to one side of the connecting plate (8).
8. The prestressed tension bracket for concrete precast members according to claim 1, wherein, Limit blocks (11) are fixedly connected to the top and bottom of the docking block (6), a limit groove (12) is opened in the inner cavity of the second connecting block (4), and the outer side of the limit block (11) is slidably connected to the inner wall of the limit groove (12).