CN217627490U

CN217627490U - Jack for tensioning prestressed steel strand

Info

Publication number: CN217627490U
Application number: CN202221215304.6U
Authority: CN
Inventors: 邵光卫
Original assignee: Kaifeng Dafang Prestress Co ltd
Current assignee: Kaifeng Dafang Prestress Co ltd
Priority date: 2022-05-18
Filing date: 2022-05-18
Publication date: 2022-10-21
Anticipated expiration: 2032-05-18

Abstract

The utility model relates to a jack for stretching prestressed steel strand, which comprises a jack, wherein a first supporting plate is sleeved on the jack, a second supporting plate is hinged at one side of the first supporting plate, which is far away from the jack, and angle adjusting devices are arranged on the first supporting plate and the second supporting plate; the angle adjusting device comprises an adjusting screw rod arranged at the other end of the first supporting plate, a first limiting groove arranged on the second supporting plate and a supporting seat arranged at one end of the adjusting screw rod close to the first limiting groove; the supporting seat is movably connected with the first limiting groove, the cross section of the first limiting groove is semicircular, the cross section of the supporting seat is circular, and a level meter is arranged at the top of the first supporting plate. The product is convenient to install on the outer surface of the inclined concrete structure, and the included angle between the first supporting plate and the second supporting plate is convenient to adjust through the angle adjusting device. The utility model discloses adjust, convenient to use, have extensive market prospect.

Description

Jack for stretching prestressed steel strand

Technical Field

The utility model relates to a jack field, concretely relates to a jack for stretch-draw prestressing force steel strand wires.

Background

With the development of the prestress technology, the prestress tension equipment is increasingly widely applied to the building engineering. In the process of prestress construction, prestress tensioning equipment is usually adopted to apply certain tensile stress to the steel bars or the steel strands, so that the steel bars or the steel strands are deformed to a certain extent, and the requirements on the stress and the deformation precision of the steel bars are high. In order to ensure the accuracy of the prestress direction and the deformation of the prestressed reinforcement, the tensioning device and the tensioning direction need to be on the same straight line.

In the actual construction process, the outer surface of a common concrete structure is inclined, and the central axes of a part of the reserved holes of most steel strands close to the outer side are all parallel to the horizontal plane; the outer surface of the concrete structure is not perpendicular to the axis of the prestressed steel strand bundle, the outer surface of the concrete is generally leveled in the prior art, then tensioning equipment such as a jack and the like is installed on the outer surface of the commented concrete, and finally the steel strand bundle is tensioned; the process is too complicated to just appear easily because there is not corresponding instrument of indicating that steel strand bundle is damaged by the outside end of reserving the hole easily and leads to the steel strand rupture in tensioning process, and all adopt simple instrument to support the jack in the tensioning process among the prior art, this jack that also leads to the jack to take place stress and jack's application of force direction inequality and lead to in tensioning process easily and damage.

Disclosure of Invention

The utility model provides a not enough to prior art, the utility model provides a can be convenient for on the concrete structure surface mounting of slope form with steel strand wires line axis looks vertically be used for the jack of stretch-draw prestressing force steel strand wires for overcome defect among the prior art.

The utility model adopts the technical proposal that: a jack for stretching a prestressed steel strand comprises a jack, wherein a first supporting plate is sleeved on the jack, a second supporting plate is hinged to one side, away from the jack, of one end of the first supporting plate, and angle adjusting devices are arranged on the first supporting plate and the second supporting plate; the angle adjusting device comprises an adjusting screw rod arranged at the other end of the first supporting plate, a first limiting groove arranged on the second supporting plate and a supporting seat arranged at one end of the adjusting screw rod close to the first limiting groove; the supporting seat is movably connected with the first limiting groove, the cross section of the first limiting groove is semicircular, the cross section of the supporting seat is circular, and a level gauge is arranged at the top of the first supporting plate.

Preferably, the angle adjusting device further comprises a limiting sleeve arranged on one side of the supporting seat far away from the first limiting groove, a second limiting groove is formed in the limiting sleeve, and the part for adjusting the screw rod is sleeved on the second limiting groove.

Preferably, first backup pad on be provided with the lead screw clearing hole, the part of adjusting the lead screw is located the lead screw and passes through downtheholely, be provided with adjusting nut respectively on the adjusting the lead screw of lead screw clearing hole both sides.

Preferably, the second support plate is provided with an expansion bolt hole and a steel strand through hole.

Preferably, the first support plate is provided with a first support frame on one side close to the second support plate, the second support plates on two sides of the first support frame are provided with second support frames, one end of the first support frame close to the second support plate and one end of the second support frame close to the first support plate are provided with hinge shafts, and the first support frame is of a triangular structure.

Preferably, the first limiting groove is of a bucket-shaped structure, the inner cavity between the limiting sleeve and the first limiting groove is spherical, and the shape of the supporting seat is matched with the shape of the inner cavity between the limiting sleeve and the first limiting groove.

The utility model has the advantages that: first, the utility model discloses be applied to the construction scene that leans on the one end and the horizontal plane parallel in the outside of the steel strand wires hole that concrete structure reserved, be convenient for at the concrete structure surface mounting of slope form this product to be convenient for adjust the contained angle between first backup pad and the second backup pad and pass through spirit level feedback information through angle adjusting device.

Secondly, the stop collar constitute the components of a whole that can function independently structure by first spacing piece and the spacing piece of second, first spacing piece and second backup pad between and spacing piece of second and second backup pad between equally divide and do not pass through bolt fastening. It is convenient for first spacing piece with when the second spacing piece appear damaging, change corresponding spare part.

Finally, the first limiting groove of the utility model adopts a bucket-shaped structure, the inner cavity between the limiting sleeve and the first limiting groove adopts a ball shape, and the shape of the supporting seat adopts a ball-shaped structure matched with the shape of the inner cavity between the limiting sleeve and the first limiting groove; the contact area between the supporting seat and the limiting sleeve and between the supporting seat and the first limiting groove are increased, and the stability of stress support is improved.

The utility model has the advantages of simple structure, convenient operation, design benefit has improved work efficiency greatly, has fine social and economic benefits, is the product of easily using widely.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of the second supporting plate of the present invention.

Fig. 3 is a top view of the first supporting plate of the present invention.

Detailed Description

As shown in fig. 1 to 3, a jack for tensioning prestressed steel strands comprises a jack 1, wherein the jack 1 is sleeved with a first support plate 2, a first support frame 13 is arranged on one side of the first support plate 2 close to a second support plate 3, second support frames 14 are arranged on the second support plates 3 on two sides of the first support frame 13, a hinge shaft 15 is arranged at one end of the first support frame 13 close to the second support plate 3 and one end of the second support frame 14 close to the first support plate 2, and the first support frame 13 is hinged on the hinge shaft 15; the first support frame 13 adopts a triangular structure.

At least two angle adjusting devices are arranged on the first supporting plate 2 and the second supporting plate 3; the angle adjusting device comprises an adjusting screw rod 4 arranged at the other end of the first supporting plate 2, a first limiting groove 5 arranged on the second supporting plate 3 and a supporting seat 6 arranged at one end of the adjusting screw rod 4 close to the first limiting groove 5; supporting seat 6 and first spacing groove 5 swing joint, the cross-section of first spacing groove 5 adopts semi-circular, the cross-section of supporting seat 6 adopt circularly, the top of first backup pad 2 is provided with spirit level 16, first support frame 13 is installed in the one end that is close to spirit level 16.

The angle adjusting device further comprises a limiting sleeve 7 arranged on one side, away from the first limiting groove 5, of the supporting seat 6, a second limiting groove 8 is formed in the limiting sleeve 7, and the adjusting screw rod 4 is partially sleeved on the second limiting groove 8. First backup pad 2 on be provided with lead screw clearing hole 9, adjust the part of lead screw 4 and be located lead screw clearing hole 9, be provided with adjusting nut 10 on the regulation lead screw 4 of lead screw clearing hole 9 both sides respectively.

The second supporting plate 3 is provided with an expansion bolt hole 11 and a steel strand through hole 12. Second backup pad 3 adopt rectangle platelike structure, all correspond on four angles of second backup pad 3 and seted up expansion bolt hole 11 and be used for installing expansion bolts to improve the support nature of concrete to this product.

The first limiting groove 5 is of a bucket-shaped structure, an inner cavity between the limiting sleeve 7 and the first limiting groove 5 is of a spherical shape, and the supporting seat 6 is of a spherical structure matched with the inner cavity between the limiting sleeve 7 and the first limiting groove 5 in shape; the contact area between the supporting seat 6 and the limiting sleeve 7 and between the supporting seat 6 and the first limiting groove 5 are increased, and the stability of stress support is improved.

The stop collar 7 is a split structure consisting of a first stop piece and a second stop piece, and the first stop piece and the second support plate 3 as well as the second stop piece and the second support plate 3 are fixed by bolts. It is convenient for first spacing piece with when the second spacing piece appear damaging, change corresponding spare part.

As shown in fig. 1 to fig. 3, in a construction scene in which one end of a steel strand hole reserved in the concrete structure, which is close to the outer side, is parallel to a horizontal plane, the concrete use method is as follows: firstly, mounting a second support plate 3 of the product on the outer side end of the steel strand hole, and fixing the second support plate 3 of the product on the outer side of the concrete structure by mounting expansion bolts at corresponding positions of expansion bolt holes 11, wherein the level gauge 16 is positioned at the top of the first support plate 2; then, adjust angle adjusting device according to the information that spirit level 16 fed back for first backup pad 2 and steel strand wires axis are mutually perpendicular, and when the bubble of spirit level 16 was located central point, first backup pad 2 was located the plane that is mutually perpendicular with the horizontal plane this moment, was the preset adjusting position of first backup pad 2 promptly.

Finally, the jack 1 is installed on the first supporting plate 2, and the corresponding tool anchor and the corresponding tool clamping piece are installed on the jack 1 to sequentially clamp the plurality of steel strands to finish the preparation work before tensioning, so that the steel strands can be tensioned.

By the embodiment, the product is conveniently mounted on the outer surface of the inclined concrete structure, the included angle between the first supporting plate 2 and the second supporting plate 3 is conveniently adjusted by the angle adjusting device, so that the first supporting plate 2 is perpendicular to the central axis of the steel strand bundle, and information is fed back by the level gauge 16; in the process of tensioning the steel strand bundle of the jack 1, the first support plate 2 transmits force to a concrete structure through the adjusting screw rod 4 and the support seat 6, and in the process, the limiting sleeve 7 is attached to the support seat 6; first spacing groove 5 and supporting seat 6 are laminated mutually, and the inner chamber between stop collar 7 and the first spacing groove 5 adopts spherically, supporting seat 6 the shape adopt with stop collar 7 and first spacing groove 5 between the shape matched with spherical structure of inner chamber, increased lifting surface area, improved the concrete structure at the stretch-draw process to the support stability of jack. In addition, it should be noted that, in order to solve the construction scenario that one end of the steel strand hole reserved in the concrete structure, which is close to the outside, is not parallel to the horizontal plane, the final adjustment position of the first support plate 2 of the product needs to be determined by receiving an external protractor.

The utility model discloses a jack that is used for stretch-draw prestressing force steel strand wires that satisfies in jack field worker needs makes the utility model discloses extensive market prospect has.

Claims

1. The utility model provides a jack for stretch-draw prestressing force steel strand, includes jack (1), jack (1) go up the cover and be equipped with first backup pad (2), its characterized in that: a second supporting plate (3) is hinged to one end of the first supporting plate (2) far away from the jack (1), and angle adjusting devices are arranged on the first supporting plate (2) and the second supporting plate (3); the angle adjusting device comprises an adjusting screw rod (4) arranged at the other end of the first supporting plate (2), a first limiting groove (5) formed in the second supporting plate (3) and a supporting seat (6) arranged at one end, close to the first limiting groove (5), of the adjusting screw rod (4); supporting seat (6) and first spacing groove (5) swing joint, the cross-section in first spacing groove (5) adopts semi-circular, the cross-section of supporting seat (6) adopt circularly, the top of first backup pad (2) is provided with spirit level (16).

2. The jack for tensioning prestressed steel strands as recited in claim 1, wherein: the angle adjusting device further comprises a limiting sleeve (7) which is arranged on one side of the supporting seat (6) far away from the first limiting groove (5), a second limiting groove (8) is formed in the limiting sleeve (7), and the part of the adjusting lead screw (4) is sleeved on the second limiting groove (8).

3. The jack for tensioning prestressed steel strands as recited in claim 1, wherein: first backup pad (2) on be provided with lead screw clearing hole (9), the part of adjusting lead screw (4) is located lead screw clearing hole (9), divide equally on adjusting lead screw (4) of lead screw clearing hole (9) both sides and do not be provided with adjusting nut (10).

4. The jack for tensioning prestressed steel strands as recited in claim 1, wherein: and the second support plate (3) is provided with an expansion bolt hole (11) and a steel strand through hole (12).

5. The jack for tensioning prestressed steel strands of claim 1, wherein: first backup pad (2) be provided with first support frame (13) in one side of being close to second backup pad (3), be provided with second support frame (14) on second backup pad (3) of first support frame (13) both sides, one end that first support frame (13) are close to second backup pad (3) and one of second support frame (14) are close to first backup pad (2) serve and be provided with hinge (15), first support frame (13) adopt triangle-shaped structure.

6. The jack for tensioning prestressed steel strands according to claim 2, wherein: first spacing groove (5) adopt the bucket column structure, stop collar (7) and the inner chamber between first spacing groove (5) adopt spherically, the shape of supporting seat (6) and stop collar (7) and the shape of inner chamber between first spacing groove (5) cooperate.