Adjusting type pre-stressed anchorage device

Abstract

The adjustable prestressed anchorage device is used for adjusting the prestress of a steel strand and comprises an adjusting body, an outer threaded pipe is welded to one side of the adjusting body, an elastic adjusting rod set is welded to the side, corresponding to the outer threaded pipe, of the adjusting body, and the elastic adjusting rod set comprises a plurality of elastic adjusting rods; the multiple elastic adjusting rods are arranged around the steel strand at intervals, and the sides, facing the steel strand, of the adjusting rods are rotationally connected with rubber wheels. A circumferential movable groove is formed in the inner wall of the inner threaded pipe; a cone-shaped through hole allowing the steel strand to penetrate through is formed in the cone-shaped main body, the cone-shaped through hole corresponds to the elastic adjusting rod set, and a limiting ring is welded to the side, away from the outer threaded pipe, of the cone-shaped main body; the limiting ring is embedded in the movable groove, and the limiting ring and the movable groove rotate relative to each other. According to the steel strand, the number of stress points is large, and the steel strand is prevented from being damaged in the stress process.

Description

Technical Field

[0001] This application belongs to the technical field of anchor devices, and specifically relates to an adjustable prestressed anchor device. Background Art

[0002] Stress anchor devices are applicable to the anchor devices used for concrete prestress tensioning during the engineering construction process. They are generally often used in the construction of large-span and extra-long industrial and civil buildings and bridges. They are pre-installed and positioned, and then concrete is poured. They are buried at both ends of the concrete, that is, at the two ends of the corrugated pipe. When tensioning, it makes the jack more stable. It is mainly applicable to the engineering construction process, such as: large-span and extra-long industrial and civil buildings, highway bridges, railway bridges, urban interchanges, urban light rails, high-rise buildings, water conservancy and hydropower dams, port terminals, rock slope anchoring, foundation reinforcement, tunnel roof anchoring, prestressed steel grids.

[0003] For example, the application with the publication number CN221001660U discloses an adjustable prestressed anchor device, which is applied in the technical field of anchor devices. In this utility model, a steel strand is cooperated with a threaded bushing and inserted into the threaded groove inside the first through groove, and the threaded bushing is rotated to make the threaded bushing rotate and embed into the threaded groove. When the right end of the steel strand is pulled by force, the pulling force will make the rotating block drive the threaded bushing to rotate through the rotating groove. Since the threaded bushing has been pre-screwed into the threaded groove, the greater the applied force, the higher the connection strength between the threaded bushing and the threaded groove, and finally the steel strand is effectively and firmly fixed in the first anchor pipe, greatly improving the fixing strength of the anchor device for the steel strand; after the steel strand is inserted into the inner cavity of the second anchor pipe through the first anchor pipe, the other end of the steel strand passes through the third through groove and is stretched to an appropriate length, and then a cross screwdriver is docked with the cross groove, and the connecting rod is pushed to move into the inner cavity of the second anchor pipe, improving the overall tensile strength of the steel strand.

[0004] However, in this application, the corresponding adjustment unit only has forces on both sides, and the stress points of the steel strand are few, which is easy to cause internal damage that is not easy to detect, resulting in reduced durability. Summary of the Invention

[0005] The purpose of this application is to provide an adjustable prestressed anchor device to solve the problem mentioned above that the corresponding adjustment unit only has forces on both sides, the stress points of the steel strand are few, which is easy to cause internal damage that is not easy to detect, resulting in reduced durability.

[0006] The technical solution adopted in this application is as follows: A regulating prestressed anchor is used to adjust the prestress of the steel strand, including: A regulating main body, on one side of which an external thread tube is welded. On the side of the regulating main body corresponding to the external thread tube, an elastic adjusting rod group is welded. The elastic adjusting rod group includes a plurality of elastic adjusting rods, and the plurality of elastic adjusting rods are arranged at intervals around the steel strand. On the side of the adjusting rod facing the steel strand, a rubber wheel is rotatably connected; An internal thread tube, on the inner wall of which a circumferential movable groove is provided; A frustum main body, which is provided with a tapered through hole for the steel strand to pass through, and the tapered through hole corresponds to the elastic adjusting rod group. On the side of the frustum main body away from the external thread tube, a limiting ring is welded; The limiting ring is embedded in the movable groove and rotates relative to the movable groove.

[0007] Further, it also includes: A force-adjusting rod, which axially abuts against the limiting ring; On the inner surface of the internal thread tube on one side of the movable groove, a limiting block is welded, and the force-adjusting rod circumferentially abuts against the limiting block.

[0008] Further, it also includes: A basic anchor, which is provided with a card slot; On the side of the regulating main body away from the external thread tube, a reference alignment block is welded, and the reference alignment block is inserted into the card slot.

[0009] Further, it also includes: A buried plate, which is welded on the outer surface of the basic anchor away from the regulating main body, and fixing holes are arranged on the outer surface of the buried plate.

[0010] Further, it also includes: A support plate, which is welded on the outer surface of the buried plate; A support shell, which is welded on the outer surface of the support plate.

[0011] Further, it also includes: Two anti-drop rings, which are welded on the inner surface of the support shell; An adjusting toothed ring, which is clamped between the two anti-drop rings and rotates relative to the support shell; A plurality of rotating gears, which are arranged in the inner cavity of the support shell through rotating shafts, and the rotating gears are engaged with the adjusting toothed ring; A clamping fan blade, which is fixedly connected to the outer surface of the rotating gear.

[0012] Further, it also includes: An external protruding block, which is on the outer surface of the adjusting toothed ring; The support shell is provided with an arc-shaped groove, and an adjusting slider is slidably connected in the arc-shaped groove, and the adjusting slider circumferentially abuts against the external protruding block.

[0013] In summary, due to the adoption of the above technical solution, the beneficial effects of this application are:

[0014] In this application, the internal threaded pipe is threadedly connected to the external threaded pipe. Since the limiting ring is embedded in the movable groove, the frustum-shaped body and the external threaded pipe are axially fixed. When the internal threaded pipe is rotated, only the frustum-shaped body will be driven to move axially, and the frustum-shaped body will not rotate with the internal threaded pipe. When the frustum-shaped body approaches the adjusting body, the tapered hole forces the elastic adjusting rod to tilt, causing the elastic adjusting rod to contract inward in the tapered hole, thereby increasing the pressure of the rubber wheel on the steel strand, and further changing the prestress of the anchor on the steel strand. This technical solution is simple in structure, has many stress points for the steel strand, and by setting the rubber wheel, it prevents the steel strand from being damaged during the stress process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the front view of the equipment appearance of this application;

[0016] Figure 2 is the rear view of the equipment appearance in this application;

[0017] Figure 3 is the disassembled view of the external adjustment structure of the equipment in this application;

[0018] Figure 4 is the disassembled view of the internal adjustment structure of the equipment in this application;

[0019] Figure 5 In this application Figure 3 is the enlarged partial view of part A.

[0020] Reference numerals in the drawings: 1, adjusting body; 2, external threaded pipe; 3, elastic adjusting rod; 4, rubber wheel; 5, frustum-shaped body; 6, limiting ring; 7, internal threaded pipe; 8, movable groove; 9, limiting block; 10, stress adjusting rod; 11, reference alignment block; 12, basic anchor; 13, embedded plate; 14, fixing hole; 15, support plate; 16, support housing; 17, anti-detachment ring; 18, adjusting gear ring; 19, rotating gear; 20, clamping fan blade; 21, external protruding block; 22, adjusting slider. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the embodiments of this application. Obviously, the described embodiments are some, but not all, of the embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts shall fall within the scope of protection of this application.

[0022] Refer to Figures 1-3 , a regulating prestressed anchor for adjusting the prestress of a steel strand, comprising:

[0023] Adjusting body 1, on one side of the adjusting body 1, an external threaded pipe 2 is welded. On the side of the adjusting body 1 corresponding to the external threaded pipe 2, a group of elastic adjusting rods 3 is welded. The group of elastic adjusting rods 3 includes a plurality of elastic adjusting rods 3. The plurality of elastic adjusting rods 3 are arranged at intervals around the steel strand. On the side of the adjusting rod 3 facing the steel strand, a rubber wheel 4 is rotatably connected.

[0024] Internal threaded pipe 7, on the inner wall of the internal threaded pipe 7, a circumferential moving groove 8 is provided.

[0025] Frustum-shaped body 5, the frustum-shaped body 5 is provided with a tapered through hole for the steel strand to pass through. The tapered through hole corresponds to the group of elastic adjusting rods 3. On the side of the frustum-shaped body 5 away from the external threaded pipe 2, a limiting ring 6 is welded. The limiting ring 6 is embedded in the moving groove 8.

[0026] The internal threaded pipe 7 is threadedly connected to the external threaded pipe 2. Since the limiting ring 6 is embedded in the moving groove 8, the frustum-shaped body 5 and the external threaded pipe 2 are axially fixed. When the internal threaded pipe 7 is rotated, only the frustum-shaped body 5 will be driven to move axially, and the frustum-shaped body 5 will not rotate following the internal threaded pipe 7. When the frustum-shaped body 5 approaches the adjusting body 1, the tapered hole forces the elastic adjusting rod 3 to tilt, causing the elastic adjusting rod 3 to contract inward in the tapered hole, so that the pressure of the rubber wheel 4 on the steel strand becomes larger, thereby changing the prestress of the anchor on the steel strand. The overall effect of this technical solution is simple and remarkable. It can be further adjusted according to the use scenario after use. Similarly, the above-mentioned components can also be used as tool anchors, which is convenient for demolition, allows precise adjustment of the prestress level during construction, ensures that the structure meets the design requirements and safety standards. During long-term use, the prestress can be adjusted to repair or strengthen the structure, extend its service life and improve safety. By dynamically adjusting the prestress, structural damage caused by excessive or insufficient prestress can be reduced. This technical solution is simple in structure, has many stress points for the steel strand, and by setting rubber wheels, damage to the steel strand during the stress process can be prevented.

[0027] Further, referring to Figure 1 Figure 3, it further includes a force adjustment rod 10. The force adjustment rod 10 axially abuts against the limiting ring 6. On the inner surface of the internal threaded pipe 7 on one side of the moving groove 8, a limiting block 9 is welded. The force adjustment rod 10 circumferentially abuts against the limiting block 9. The external device drives the rotation of the internal threaded pipe 7 by rotating the force adjustment rod 10.

[0028] Further, referring to Figure 1Or 3, it further includes a base anchor 12, and the base anchor 12 is provided with a clamping groove; on one side of the adjusting body 1 away from the external threaded pipe 2, a reference alignment block 11 is welded, and the reference alignment block 11 is clamped into the clamping groove. The base anchor 12 serves as a basic prestressed anchor, providing a basis for its main function. The reference alignment block 11 is clamped in the clamping groove of the base anchor 12, aligning the device and facilitating the installation of the base anchor 12.

[0029] Further, referring to Figures 1-4 , on the outer surface of one side of the base anchor 12 away from the adjusting body 1, a pre-embedded plate 13 is welded, and the pre-embedded plate 13 is provided with fixing holes 14. The pre-embedded plate 13 facilitates external support and fixation, and the fixing holes 14 assist in further external fixation.

[0030] Further, referring to Figures 1-4 , on the outer surface of the pre-embedded plate 13, a support plate 15 is welded, and on the outer surface of the support plate 15, a support housing 16 is welded. The support plate 15 and the support housing 16 form an external space, facilitating internal stress adjustment.

[0031] Further, referring to Figures 1-4 , it further includes an anti-detachment ring 17 and an adjustment gear ring 18. There are two anti-detachment rings 17, and the anti-detachment rings 17 are welded on the inner surface of the support housing 16. The adjustment gear ring 18 is clamped between the two anti-detachment rings 17, and the adjustment gear ring 18 rotates relative to the support housing 16.

[0032] Further, referring to Figure 4 , it further includes a plurality of rotating gears 19. The rotating gears 19 are arranged in the inner cavity of the support housing 16 through rotating shafts, and the rotating gears 19 are meshed with the inner teeth of the adjustment gear ring 18; on the outer surface of the rotating gears 19, clamping fan blades 20 are fixedly connected. The inner ring of the adjustment gear ring 18 is provided with inner teeth. By rotating the adjustment gear ring 18, the rotating gears 19 are driven to rotate, and then the iris structure formed by the rotation of the clamping fan blades 20 is completed, achieving opening and clamping with different radii, thereby changing the prestress applied to the steel strand.

[0033] Further, referring to Figure 2 Or 4, on the outer surface of the adjustment gear ring 18, an outer protruding block 21 is welded, and the support housing 16 is provided with an arc-shaped groove. An adjustment slider 22 is slidably connected in the arc-shaped groove, and the adjustment slider 22 is in circumferential contact with the outer protruding block 21. The adjustment slider 22 moves in the arc-shaped groove of the support housing 16, thereby driving the outer protruding block 21 to rotate, causing the adjustment gear ring 18 to also rotate, and thus completing the adjustment of the opening and clamping with different radii formed by the rotation of the clamping fan blades 20.

[0034] The implementation principle of the embodiment of the adjustable prestressed anchor of the present application is:

[0035] In use, an external device drives the rotation of the internally threaded tube 7 through the force adjustment rod 10. The internally threaded tube 7 screws into the externally threaded tube 2, thereby driving the axial movement of the frustum main body 5. The tapered hole of the frustum main body 5 forces the adjustment rod 3 to incline, so that the pressure of the rubber wheel 4 on the steel strand becomes greater and greater, thereby changing the prestress of the anchor on the steel strand.

[0036] The above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A regulating type prestressed anchor, which is used to adjust the prestress of steel strands, is characterized in that, Comprising: A regulating body (1), on one side of the regulating body (1), an externally threaded pipe (2) is welded, on the side of the regulating body (1) corresponding to the externally threaded pipe (2), an elastic adjustment rod group is welded, the elastic adjustment rod group includes a plurality of elastic adjustment rods (3), the plurality of elastic adjustment rods (3) are arranged at intervals around the steel strand, and on the side of the adjustment rod (3) facing the steel strand, a rubber wheel (4) is rotatably connected; An internally threaded pipe (7), on the inner wall of the internally threaded pipe (7), a circumferential movable groove (8) is provided; A frustum-shaped body (5), the frustum-shaped body (5) is provided with a tapered through hole for the steel strand to pass through, the tapered through hole corresponds to the elastic adjustment rod group, on the side of the frustum-shaped body (5) away from the externally threaded pipe (2), a limiting ring (6) is welded; the limiting ring (6) is embedded in the movable groove (8) and the limiting ring (6) rotates relative to the movable groove (8).

2. The adjustable prestressed anchor as claimed in claim 1, wherein, Further comprising: A force-adjusting rod (10), the force-adjusting rod (10) axially abuts against the limiting ring (6); On the inner surface of the internally threaded pipe (7) on one side of the movable groove (8), a limiting block (9) is welded, and the force-adjusting rod (10) circumferentially abuts against the limiting block (9).

3. The adjustable prestressed anchor as claimed in claim 1, wherein, Further comprising: A basic anchor (12), the basic anchor (12) is provided with a card slot; On the side of the regulating body (1) away from the externally threaded pipe (2), a reference alignment block (11) is welded, and the reference alignment block (11) is inserted into the card slot.

4. The adjustable prestressed anchor as claimed in claim 3, wherein, Further comprising: A pre-embedded plate (13), the pre-embedded plate (13) is welded on the outer surface of the basic anchor (12) on the side away from the regulating body (1), and on the outer surface of the pre-embedded plate (13), fixing holes (14) are provided.

5. The adjustable prestressed anchor as claimed in claim 4, wherein, Further comprising: A support plate (15), the support plate (15) is welded on the outer surface of the pre-embedded plate (13); A support housing (16), the support housing (16) is welded on the outer surface of the support plate (15).

6. The adjustable prestressed anchor as claimed in claim 5, wherein, Further comprising: Anti-detachment rings (17), there are two anti-detachment rings (17), the anti-detachment rings (17) are welded on the inner surface of the support housing (16); An adjustment gear ring (18), the adjustment gear ring (18) is clamped between the two anti-detachment rings (17), and the adjustment gear ring (18) rotates relative to the support housing (16); A plurality of rotating gears (19), the rotating gears (19) are arranged in the inner cavity of the support housing (16) through a rotating shaft, and the rotating gears (19) are engaged with the adjustment gear ring (18); A clamping fan blade (20), the clamping fan blade (20) is fixedly connected to the outer surface of the rotating gear (19).

7. The adjustable prestressed anchor as claimed in claim 6, wherein Further comprising: An externally protruding block (21), the externally protruding block (21) is on the outer surface of the adjustment gear ring (18); The support housing (16) is provided with an arc-shaped groove, and in the arc-shaped groove, an adjustment slider (22) is slidably connected, and the adjustment slider (22) circumferentially abuts against the externally protruding block (21).

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