Conical embedded type replaceable thread mold of steel strand post-tensioning single-hole clamping piece anchorage device

Abstract

The utility model relates to the technical field of building construction, in particular to a steel strand post-tensioning single-hole clamping piece anchorage device conical embedded type replaceable threaded mold which comprises a pouring formwork, a cable protection pipe, a bearing plate and a steel strand, the cable protection pipe is detachably arranged between the pouring formwork and the bearing plate, the bearing plate is pre-buried in concrete, one end of the steel strand penetrates through the bearing plate, and the other end of the steel strand penetrates through the bearing plate. One end of the steel strand penetrates through the bearing plate, the other end of the steel strand penetrates through the pouring formwork, a wire hole for the steel strand to penetrate through is formed in the bearing plate, a plate hole for the steel strand to penetrate through is formed in the pouring formwork, a sealing assembly is arranged between the bearing plate and the steel strand and used for plugging the wire hole, and a positioning assembly is arranged between the pouring formwork and the bearing plate and used for fixing the position of the bearing plate. The device has the effects of being accurate in positioning and small in damage to concrete.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of building construction, in particular to a replaceable threaded mold in a conical embedded mode of a steel strand post-tensioning single-hole clamping piece anchor. BACKGROUND

[0002] At present, in large-scale building engineering, prestress technology is widely used to improve the safety and durability of structures, and is particularly favored in large-span bridges, high-rise buildings and large-thickness plate structures. However, in the construction process of the traditional prestress technology, a hole is reserved on the pouring layer, and then the end of the steel strand is embedded in the reserved hole through the concrete, and then prestress is applied to the steel strand to improve the strength of the structure.

[0003] The common method for realizing the reserved hole in the pouring layer at present is to fill the reserved hole with four square polystyrene foams after the installation of the steel bars, so as to prevent the cement slurry from flowing in during the pouring of the concrete. The advantages of this method are simple operation and low cost; however, the polystyrene foams are prone to displacement under the impact of the concrete during the pouring process, thereby causing a large deviation of the reserved hole position and affecting the accuracy of the fixed position of the steel strand. In the process of cleaning and chiseling the polystyrene foams in the later stage, the surface of the concrete is easily damaged, which may cause the strength of the construction structure of the concrete to decrease, and there are obvious deficiencies. CONTENT OF THE INVENTION

[0004] In order to improve the problems existing in the realization of the reserved hole by using the polystyrene foams, the application provides a replaceable threaded mold in a conical embedded mode of a steel strand post-tensioning single-hole clamping piece anchor.

[0005] The replaceable threaded mold in a conical embedded mode of the steel strand post-tensioning single-hole clamping piece anchor provided by the application adopts the following technical scheme:

[0006] The replaceable threaded mold in a conical embedded mode of the steel strand post-tensioning single-hole clamping piece anchor comprises a pouring formwork, a cable protection pipe, a pressure bearing plate and a steel strand, the cable protection pipe is detachably arranged between the pouring formwork and the pressure bearing plate, the pressure bearing plate is embedded in the concrete, one end of the steel strand passes through the pressure bearing plate, and the other end of the steel strand passes through the pouring formwork, a wire hole through which the steel strand passes is formed in the pressure bearing plate, a plate hole through which the steel strand passes is formed in the pouring formwork, a sealing assembly is arranged between the pressure bearing plate and the steel strand, the sealing assembly is used for plugging the wire hole, and a positioning assembly is arranged between the pouring formwork and the pressure bearing plate, the positioning assembly is used for fixing the position of the pressure bearing plate.

[0007] By adopting the technical scheme, the worker opens a plate hole on the pouring formwork at the reserved hole, and realizes the position fixing of the cable tube and the pressure plate through the positioning assembly, then realizes the sealing between the steel strand and the wire hole through the sealing assembly, reduces the possibility of concrete entering the cable tube during pouring, and after the poured concrete solidifies and the pouring formwork is removed, one end of the pressure plate and the steel strand is pre-buried in the concrete, thereby improving the positioning accuracy of the steel strand, and when the steel strand is tensioned, the worker can conveniently chisel the inner side wall of the concrete left by the cable tube.

[0008] Optionally, the positioning assembly comprises a positioning rod detachably arranged on the pouring formwork, the positioning rod is located in the cable tube, the pressure plate is provided with a positioning groove, one end of the positioning rod away from the pouring formwork is inserted into the positioning groove on the pressure plate, and a supporting piece is arranged between the positioning rod and the cable tube, and the supporting piece is used for supporting the cable tube.

[0009] By adopting the technical scheme, when the pouring formwork is fixed, the worker fixes the positioning rod on the pouring formwork, then sleeves the cable tube on the positioning rod and supports the cable tube through the supporting piece, and finally inserts the positioning groove on the pressure plate into the end of the positioning rod, so as to realize the fixing and installation of the cable tube and the pressure plate.

[0010] Optionally, a plurality of positioning rods are arranged on the pouring formwork, the plurality of positioning rods are uniformly distributed along the axis of the plate hole in the circumferential direction, the supporting piece comprises a supporting rod slidingly arranged on the positioning rod, the supporting rod is provided with an arc plate piece, and a supporting compression spring is braced between the arc plate piece and the positioning rod, and the supporting compression spring compresses the arc plate piece against the inner side wall of the cable tube.

[0011] By adopting the technical scheme, the worker first moves the plurality of arc plate pieces close to each other, and in this process, the supporting compression spring is continuously compressed, when the cable tube is sleeved on the plurality of positioning rods, the worker releases the arc plate piece, the supporting compression spring restores the deformation, and the arc plate piece is compressed against the inner side wall of the cable tube, and at this time, the cable tube is completely expanded.

[0012] Optionally, the cable tube is made of rubber material, and the diameter of the cable tube gradually decreases along the direction from the pouring formwork to the pressure plate.

[0013] By adopting the technical scheme, it is convenient for the worker to remove the cable tube after the pouring formwork is removed, and it is convenient for the worker to chisel the concrete reserved hole left by the cable tube, which is beneficial to improve the solidification effect of the concrete when filling the reserved hole.

[0014] Optionally, the sealing assembly comprises a sealing cone arranged on the steel strand, the sealing cone gradually decreases in diameter along a direction from the pressure plate to the cable tube, the wire hole of the pressure plate is provided with a guide cone surface for abutting the sealing cone, and the pouring formwork is provided with a tensioning piece for abutting the sealing cone on the guide cone surface.

[0015] By adopting the above technical scheme, the sealing cone on the steel strand is abutted on the guide cone surface of the pressure plate under the action of the tensioning piece, so as to realize sealing of the wire hole and accurate positioning of the embedded length and embedded position of the steel strand.

[0016] Optionally, the tensioning piece comprises a tensioning plate detachably arranged on the steel strand, and a tensioning spring is arranged between the side of the pouring formwork away from the cable tube and the tensioning plate.

[0017] By adopting the above technical scheme, the worker fixes the tensioning plate on the steel strand on the side of the pouring formwork away from the cable tube, and adjusts the compression degree of the tensioning spring, so as to make the sealing cone abut on the guide cone surface, and the restoring deformation force of the tensioning spring can make the pressure plate be pressed on the positioning rod, reducing the possibility of accidental deviation of the pressure plate, and further improving the accuracy of the embedded position of the steel strand.

[0018] Optionally, a corrosion-resistant layer is arranged on the steel strand, and a corrosion-resistant lubricating grease is arranged between the corrosion-resistant layer and the steel strand.

[0019] By adopting the above technical scheme, the possibility of corrosion of the steel strand due to external environment is reduced.

[0020] Optionally, a spiral steel bar is arranged on the side of the pressure plate away from the cable tube, and the spiral steel bar is embedded in the concrete.

[0021] By adopting the above technical scheme, the spiral steel bar improves the structural strength of the pressure plate in the concrete, and reduces the possibility of accidental separation of the pressure plate from the concrete during the process of applying prestress to the steel strand.

[0022] In summary, the present application has at least one of the following beneficial technical effects:

[0023] 1. The worker opens a plate hole on the pouring formwork at the reserved hole, fixes the positions of the cable tube and the pressure plate through the positioning assembly, then realizes sealing between the steel strand and the wire hole through the sealing assembly, reduces the possibility of concrete entering the cable tube during pouring, and after the poured concrete solidifies and the pouring formwork is removed, one end of the pressure plate and the steel strand is embedded in the concrete, so as to improve the accuracy of positioning of the steel strand, and when the steel strand is tensioned, the worker can conveniently perform chiseling on the inner side wall of the concrete left by the cable tube.

[0024] 2. When the pouring formwork is fixed, the workers fix the positioning rod on the pouring formwork, then the cable protection pipe is sleeved on the positioning rod, and the cable protection pipe is supported through the support, and finally the positioning groove on the pressure bearing plate is inserted into the end of the positioning rod, so as to fix and install the cable protection pipe and the pressure bearing plate.

[0025] 3. Under the action of the tensioning piece, the sealing cone block on the steel strand abuts against the guide cone surface on the pressure bearing plate, so as to realize sealing of the wire hole and accurate positioning of the embedded length and embedded position of the steel strand. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a structural schematic diagram of the embodiment of the present application.

[0027] Figure 2 is a sectional view of the pouring formwork, the cable protection pipe and the pressure bearing plate in the embodiment of the present application.

[0028] Explanation of reference signs: 0, concrete; 1, pouring formwork; 2, cable protection pipe; 3, pressure bearing plate; 4, steel strand; 5, wire hole; 6, plate hole; 7, sealing assembly; 71, sealing cone block; 72, guide cone surface; 73, tensioning piece; 731, tensioning plate; 7311, clamping plate; 7312, fixing bolt; 732, tensioning spring; 8, positioning assembly; 81, positioning rod; 82, positioning groove; 83, support; 831, support rod; 832, arc plate; 833, support spring; 9, anticorrosive layer; 10, spiral reinforcement; 11, anti-dropping block. DETAILED DESCRIPTION

[0029] The following will be described in detail with reference to the accompanying drawings. Figures 1-2 The present application will be further described in detail.

[0030] The embodiment of the present application discloses a steel strand post-tensioning single-hole clamp piece anchor cone-shaped embedded replaceable thread mold.

[0031] Referring to Figure 1 and Figure 2 , a steel strand post-tensioning single-hole clamp piece anchor cone-shaped embedded replaceable thread mold comprises a pouring formwork 1, a cable protection pipe 2, a pressure bearing plate 3 and a steel strand 4. The steel strand 4 adopts a j15 high-strength 1860-grade national standard low-relaxation steel strand, the standard strength fyk of which is 1860 N / mm2. An anticorrosive layer 9 is wrapped on the steel strand 4, which can be made of plastic material. An anticorrosive lubricating grease is filled in the gap between the anticorrosive layer 9 and the steel strand 4.

[0032] Referring to Figure 2The protective sleeve 2 is detachably arranged between the pouring formwork 1 and the pressure plate 3, the pressure plate 3 is embedded in the concrete 0, the side of the pressure plate 3 away from the protective sleeve 2 is welded with the spiral steel bar 10, the spiral steel bar 10 is embedded in the concrete 0, one end of the steel strand 4 passes through the pressure plate 3, and the other end passes through the pouring formwork 1.

[0033] Referring to Figure 2 The pressure plate 3 is provided with a wire hole 5 for the steel strand 4 to pass through, the pouring formwork 1 is provided with a plate hole 6 for the steel strand 4 to pass through, the sealing assembly 7 is arranged between the pressure plate 3 and the steel strand 4, the sealing assembly 7 is used for plugging the wire hole 5, and the positioning assembly 8 is arranged between the pouring formwork 1 and the pressure plate 3.

[0034] Referring to Figure 1 And Figure 2 The positioning assembly 8 comprises a plurality of positioning rods 81 bolted to the pouring formwork 1, the plurality of positioning rods 81 are uniformly distributed along the axis of the plate hole 6 in the circumferential direction, the plurality of positioning rods 81 are located in the protective sleeve 2, the pressure plate 3 is provided with a positioning groove 82, one end of the positioning rod 81 away from the pouring formwork 1 is inserted into the positioning groove 82 on the pressure plate 3, and the support 83 is arranged between the positioning rod 81 and the protective sleeve 2.

[0035] Referring to Figure 2 The protective sleeve 2 is made of rubber material, the diameter of the protective sleeve 2 gradually decreases along the direction from the pouring formwork 1 to the pressure plate 3, and the circumferential outer wall of the protective sleeve 2 is provided with threads.

[0036] Referring to Figure 2 The support 83 comprises a support rod 831 slidingly arranged on the positioning rod 81, the support rod 831 is welded with an arc plate 832, the arc plate 832 and the positioning rod 81 are supported by a support compression spring 833, the support compression spring 833 presses the arc plate 832 against the inner side wall of the protective sleeve 2, and the end of the support rod 831 away from the arc plate 832 is welded with the anti-dropping block 11.

[0037] When the pouring formwork 1 is fixed, the worker opens the plate hole 6 on the pouring formwork 1 at the position where the hole needs to be reserved, and uniformly bolted a plurality of positioning rods 81 along the axis of the plate hole 6, then the plurality of arc plates 832 are close to each other, and in this process, the support compression spring 833 is continuously compressed.

[0038] Then the protective sleeve 2 is sleeved on the plurality of positioning rods 81, the worker loosens the arc plate 832, the support compression spring 833 restores the deformation, and the arc plate 832 is pressed against the inner side wall of the protective sleeve 2, at this time, the protective sleeve 2 is completely opened,

[0039] Then the worker will be steel strand 4 in turn through the line hole 5 on the pressure plate 3, cable tube 2 and the plate hole 6 on the pouring formwork 1, after the positioning groove 82 on the pressure plate 3 is set on the end of the positioning rod 81, so as to realize the fixation and positioning of the pressure plate 3 and the cable tube 2.

[0040] Referring to Figure 1 And Figure 2 , the sealing assembly 7 comprises a sealing cone block 71 welded on the steel strand 4, the diameter of the sealing cone block 71 gradually decreases along the direction from the pressure plate 3 to the cable tube 2, the line hole 5 of the pressure plate 3 is provided with a guide taper surface 72 for abutting the sealing cone block 71, and the pouring formwork 1 is provided with a tensioning piece 73 for abutting the sealing cone block 71 on the guide taper surface 72.

[0041] Referring to Figure 1 And Figure 2 , the tensioning piece 73 comprises a tensioning plate 731 bolted on the steel strand 4, the tensioning plate 731 comprises two C-shaped clamping plates 7311, the C-shaped concave side of the clamping plate 7311 is clamped on the steel strand 4, and the two clamping plates 7311 are bolted together through a fixing bolt 7312, and a tensioning compression spring 732 is provided between the side of the pouring formwork 1 away from the cable tube 2 and the tensioning plate 731.

[0042] Then, the worker assembles the clamping plate 7311 on the steel strand 4 on the side of the pouring formwork 1 away from the cable tube 2 through the fixing bolt 7312, so as to realize the fixation of the tensioning plate 731 on the steel strand 4, and adjust the compression degree of the tensioning compression spring 732, in the process, the sealing cone block 71 on the steel strand 4 abuts on the guide taper surface 72 on the pressure plate 3, so as to realize the sealing effect of the line hole 5, and realize the accurate positioning of the embedded length and embedded position of the steel strand 4.

[0043] When the poured concrete 0 is solidified and the pouring formwork 1 is removed, the worker removes the cable tube 2, and performs chiseling treatment on the inner side wall of the concrete 0 reserved hole left by the removal of the cable tube 2, so as to facilitate the embedding of the poured concrete 0 in the reserved hole after the steel strand 4 is prestressed.

[0044] The implementation principle of the steel strand post-tensioning single-hole clamping piece anchor cone-shaped embedded replaceable thread mold according to the embodiment of the application is as follows: when the pouring formwork 1 is fixed, the worker opens the plate hole 6 on the pouring formwork 1 at the position where the hole is needed to be reserved, and uniformly bolted a plurality of positioning rods 81 around the axis of the plate hole 6, then the plurality of arc plate pieces 832 are close to each other, in the process, the supporting compression spring 833 is continuously compressed.

[0045] Then the cable tube 2 is sleeved on the plurality of positioning rods 81, the worker loosens the arc plate piece 832, the supporting compression spring 833 restores the deformation, and the arc plate piece 832 is pressed tightly on the inner side wall of the cable tube 2, at this time, the cable tube 2 is completely expanded.

[0046] Then the worker will be steel strand 4 in turn through the line hole 5 on the pressure plate 3, cable tube 2 and the plate hole 6 on the pouring formwork 1, after the positioning groove 82 on the pressure plate 3 is set in the end of the positioning rod 81, so as to realize the fixation and positioning of the pressure plate 3 and the cable tube 2.

[0047] Then, the worker assembles the clamping plate 7311 on the steel strand 4 on the side of the pouring formwork 1 away from the cable tube 2 through the fixing bolt 7312, so as to realize the fixation of the tension plate 731 on the steel strand 4, and adjust the compression degree of the tension spring 732, in the process, the sealing cone block 71 on the steel strand 4 abuts on the guide cone surface 72 on the pressure plate 3, so as to realize the sealing effect of the line hole 5, and realize the accurate positioning of the embedded length and position of the steel strand 4.

[0048] When the poured concrete 0 is solidified and the pouring formwork 1 is removed, the worker removes the cable tube 2, and performs the chiseling treatment on the inner wall of the concrete 0 reserved hole left by the removal of the cable tube 2, so as to facilitate the pouring of the concrete 0 in the reserved hole after the steel strand 4 is prestressed.

[0049] The above are the preferred embodiments of the present application, not limited to the protection scope of the present application, therefore: all equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. A cone-embedded replaceable thread die for a steel strand post-tensioned single-bore split-plate anchor, characterized by: The utility model provides a kind of concrete pouring formwork, including pouring formwork (1), cable tube (2), pressure plate (3) and steel strand (4), the cable tube (2) is detachably arranged between the pouring formwork (1) and the pressure plate (3), the pressure plate (3) is embedded in concrete (0), one end of the steel strand (4) passes through the pressure plate (3), the other end passes through the pouring formwork (1), the pressure plate (3) is provided with wire hole (5) for the steel strand (4) to pass through, the pouring formwork (1) is provided with plate hole (6) for the steel strand (4) to pass through, sealing assembly (7) is arranged between the pressure plate (3) and the steel strand (4), and the sealing assembly (7) is used to block wire hole (5), and the pouring formwork (1) and the pressure plate (3) between being provided with positioning assembly (8), and the positioning assembly (8) is used to fix the position of the pressure plate (3).

2. A cone-embedded replaceable thread die for a steel strand post-tensioning single-bore wedge anchor according to claim 1, characterized in that: The positioning assembly (8) includes a positioning rod (81) detachably arranged on the pouring formwork (1), the positioning rod (81) is located in the cable tube (2), the pressure plate (3) is provided with a positioning groove (82), one end of the positioning rod (81) away from the pouring formwork (1) is inserted into the positioning groove (82) on the pressure plate (3), and a support (83) is arranged between the positioning rod (81) and the cable tube (2), and the support (83) is used to support the cable tube (2).

3. A cone-embedded replaceable thread die for a steel strand post-tensioning single-bore wedge anchor according to claim 2, characterized in that: The positioning rod (81) is provided with a plurality of on the pouring formwork (1), and the plurality of positioning rods (81) are uniformly distributed along the axis of the plate hole (6) in a circumferential direction, the support (83) includes a support rod (831) slidably arranged on the positioning rod (81), the support rod (831) is provided with an arc plate (832), and a support compression spring (833) is provided between the arc plate (832) and the positioning rod (81), and the support compression spring (833) presses the arc plate (832) tightly on the inner side wall of the cable tube (2).

4. A cone-embedded replaceable thread die for a steel strand post-tensioning single-bore wedge anchor according to claim 2, characterized in that: The cable tube (2) is made of rubber material, and the diameter of the cable tube (2) gradually decreases from the pouring formwork (1) to the pressure plate (3).

5. A cone-embedded replaceable thread die for a steel strand post-tensioning single-bore wedge anchor according to claim 2, characterized in that: The sealing assembly (7) includes a sealing cone block (71) arranged on the steel strand (4), the diameter of the sealing cone block (71) gradually decreases from the pressure plate (3) to the cable tube (2), the wire hole (5) of the pressure plate (3) is provided with a guide cone surface (72) for abutting the sealing cone block (71), and the pouring formwork (1) is provided with a tensioning member (73), and the tensioning member (73) is used to abut the sealing cone block (71) on the guide cone surface (72).

6. A cone inlay replaceable thread die for a steel strand post-tensioned single-bore wedge anchor according to claim 5, characterized in that: The tensioning member (73) includes a tensioning plate (731) detachably arranged on the steel strand (4), and a tensioning compression spring (732) is provided between the side of the pouring formwork (1) away from the cable tube (2) and the tensioning plate (731).

7. A cone-embedded replaceable thread die for a steel strand post-tensioning single-bore wedge anchor according to claim 1, characterized in that: The steel strand (4) is provided with an anticorrosion layer (9), and anticorrosion lubricating grease is arranged between the anticorrosion layer (9) and the steel strand (4).

8. A cone-embedded replaceable thread die for a steel strand post-tensioned single-bore wedge anchor according to claim 1, characterized in that: The pressure bearing plate (3) is provided with a spiral steel bar (10) on the side away from the cable tube (2), and the spiral steel bar (10) is embedded in the concrete (0).

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