CN219010987U - Vertical prestressing steel bundle tensioning fixture - Google Patents

Abstract

The utility model relates to a vertical prestress steel beam tensioning clamp, which comprises the following components: the upper end of the nut sleeve is used for butting the screw jack; the upper end of the main screw rod is abutted against the lower end of the nut sleeve; the auxiliary screws are positioned at two sides of the main screw; a first steel anchor box penetrated by the main screw; the second steel anchor box extends into the first steel anchor box from bottom to top and is penetrated by the main screw rod and the auxiliary screw rod; the screw is used for fixing the first steel anchor box and the second steel anchor box; the first gear is arranged in the second steel anchor box and fixedly sleeved on the main screw rod and the auxiliary screw rod respectively; a second gear engaged with the first gear; the working top is coaxially arranged at the lower ends of the main screw rod and the auxiliary screw rod and is used for butting the hexagon nuts on the steel rod, and the hexagon nuts are screwed to stretch the steel rod; and the clamping nail is fixed on the second steel anchor box and slidably penetrates through the second gear. The utility model can make each bundle of three steel bars simultaneously perform prestress tensioning, and can greatly improve the construction efficiency.

Description

Vertical prestressing steel bundle tensioning fixture

Technical Field

The utility model relates to the field of prestressed steel strand tensioning, in particular to a vertical prestressed steel strand tensioning clamp.

Background

Such as chinese patent application publication No. CN 206487069U, discloses and suggests a jack-free prestressed wire tensioning and anchoring device for reinforcement. The tensioning of the prestressed steel wire in the existing prestressed high-strength steel wire-mortar coating reinforcing device mainly adopts oil jack equipment, and has the advantages of complex operation, high cost and large space requirement. The utility model relates to a connecting and anchoring steel plate for a fixed structure at the bottom of a reinforced concrete structure, wherein the connecting and anchoring steel plate is an L-shaped plate, and one end of the connecting and anchoring steel plate is provided with a downward boss; one end of the high-strength steel wire is anchored on the anchoring end through the pier head, and the other end of the high-strength steel wire passes through the hollow force transmission screw rod and then is subjected to pier head treatment; the hollow force transmission screw rod penetrates through a screw hole formed in the boss of the structural connection anchoring steel plate, and the hollow force transmission screw rod at the outer side of the boss of the structural connection anchoring steel plate is fixed through a stretching lengthening hexagon nut. The hexagonal nuts on the high-strength steel wires are required to be rotated through the torque wrench, so that tensioning is realized, one tensioning is performed at a time, and the efficiency is low.

At present, when the cast-in-situ bridge phi 16-3 vertical prestressed steel bundles are constructed, according to the design requirement, the vertical prestressed steel bundles of the block section are stretched after the strength of cast-in-situ Liang Kuaiduan concrete reaches 100%. Because phi 16-3 vertical prestressed steel bundles are arranged into three steel bars which are designed side by side, a single steel bar tensioning mode is generally adopted in the prior art to meet the design requirement, single tensioning efficiency and low tensioning efficiency are calculated according to ten minutes of tensioning, the daily average tensioning quantity is only 48, namely 16 bundles, and each steel bundle of each block section is at least 24 bundles, the fact that tensioning work of the phi 16-3 vertical prestressed steel bundles of one block section cannot be completed in one day is meant, the progress of subsequent construction procedures is seriously influenced, the construction progress is slow, and the operation efficiency and the low operation efficiency are achieved. The adoption of the traditional process has obvious disadvantages in the following aspects:

(1) the labor intensity of manual operation is high, the working procedure is complicated, the working efficiency is low, the construction progress is slow, and the construction period is difficult to guarantee;

(2) the tensioning jack is used for too many times, so that the construction efficiency is frequently influenced by checking, and the tensioning jack is more easily damaged;

(3) because the spacing between adjacent steel bars is too small, the tensioning jack is easy to generate certain influence on the adjacent steel bars during single tensioning.

Disclosure of Invention

The utility model aims to solve the technical problems that if a vertical prestress steel beam tensioning clamp can be adopted, prestress tensioning can be carried out on three steel bars of each beam at the same time, construction operation is more convenient, accuracy is higher, quality is controllable, construction efficiency can be greatly improved, and the like.

In order to solve the above problems, a vertical prestress steel strand tensioning clamp is adopted, which comprises:

the upper end of the nut sleeve is used for butting the screw jack;

the upper end of the main screw rod is abutted against the lower end of the nut sleeve;

the auxiliary screws are positioned at two sides of the main screw;

a first steel anchor box penetrated by the main screw;

the second steel anchor box extends into the first steel anchor box from bottom to top and is penetrated by the main screw rod and the auxiliary screw rod;

the screw is used for fixing the first steel anchor box and the second steel anchor box;

the first gear is arranged in the second steel anchor box and fixedly sleeved on the main screw rod and the auxiliary screw rod respectively;

the second gear is meshed with the first gears, is arranged between two adjacent first gears and is arranged in the second steel anchor box;

the working top is coaxially arranged at the lower ends of the main screw rod and the auxiliary screw rod and is used for butting the hexagon nuts on the steel rod, and the hexagon nuts are screwed to stretch the steel rod;

and the clamping nail is fixed on the second steel anchor box and slidably penetrates through the second gear.

By adopting the structure, the main screw rod is rotated through the screw jack, and the auxiliary screw rod is driven to synchronously rotate the working top through the first gear and the second gear, so that the hexagonal nut is rotated, and three steel bars are simultaneously tensioned.

As a further improvement of the vertical prestress steel bundle tensioning clamp, 4 screws are respectively arranged at four corners of the second steel anchor box, the upper end of the vertical prestress steel bundle tensioning clamp is connected with the first steel anchor box in a penetrating manner, and the lower end of the vertical prestress steel bundle tensioning clamp is connected with the second steel anchor box in a penetrating manner.

As a further improvement of the vertical prestress steel beam tensioning clamp, 2 clamping nails are respectively positioned at two sides of the main screw rod.

As a further improvement of the vertical prestress steel beam tensioning clamp, the first steel anchor box is made of a high-strength composite steel plate with the thickness of 3-4 mm.

As a further improvement of the vertical prestress steel beam tensioning clamp, the second steel anchor box is made of a thick iron plate with the thickness of 1-2 mm.

As a further improvement of the vertical prestress steel beam tensioning clamp, the specification of the steel bar is phi 16.

The utility model can simultaneously perform prestress tensioning on each bundle of three steel bars, thereby ensuring more convenient construction operation, higher precision, controllable quality, greatly improving construction efficiency and the like

Drawings

Fig. 1 is a front view of an embodiment.

Fig. 2 is a left side view of the embodiment.

Fig. 3 is a top view of an embodiment.

Reference numerals: 1. a nut sleeve; 2. a main screw; 3. a secondary screw; 4. a screw; 5. a first gear; 6. a second gear; 7. a working top; 8. a first steel anchor box; 9. and a second steel anchor box.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are based on directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element to be referred to must have a specific direction, be constructed and operated in the specific direction, and thus should not be construed as limiting the present utility model; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Example 1

As shown in fig. 1, a vertical prestress steel beam tensioning clamp mainly comprises a nut sleeve 1, a main screw 2, an auxiliary screw 3, a screw 4, a first gear 5, a second gear 6, a working top 7, a first steel anchor box 8, a second steel anchor box 9, a clamp 5 and a connecting bolt, wherein each component is manufactured independently, and then each manufactured component is connected through the bolt.

The embodiment is implemented by the device according to the following steps:

step 1) firstly, determining the sizes and the positions of the holes of the first steel anchor box 8 and the second steel anchor box 9 according to the diameter and the distance of each prestress steel rod in the vertical prestress steel bundles of different types of cast-in-situ bridges, and connecting and fixing the manufactured first steel anchor box 8 and second steel anchor box 9 through four screws 4, so that the cast-in-situ bridges can be assembled easily.

Step 2) determining the lengths of the main screw rod 2 and the auxiliary screw rod 3 according to the heights of the first steel anchor box 8 and the second steel anchor box 9, determining the sizes of the first gear 5 and the second gear 6 according to the designed intervals of each prestress steel rod, and installing and forming each component according to a schematic diagram after determining.

And 3) finally installing a nut sleeve 1 matched with the jack plug and a working plug 7 matched with the designed anchoring hexagonal nut in size, and installing a formed fixture, wherein the fixture can be used for tensioning the vertical prestressed steel bundles of the selected model after checking the rechecking size by a technician.

Step 4) when stretching work is carried out, hexagonal nuts at the top ends of a plurality of vertical prestressed steel bundles are clamped into the working top heads 7 at the same time respectively, then the main screw rod 2 is driven by the rotation of the special screw jack, the auxiliary screw rod 3 and the main screw rod 2 rotate simultaneously, in the same direction and at the same speed through the transmission of the first gear 5 and the second gear 6, and accordingly the hexagonal nuts at the top ends of the vertical prestressed steel bundles are driven to rotate, so that stretching work is carried out, and when stretching is completed, only the clamping tool is required to be lifted to separate the working top heads 7 from the hexagonal nuts at the top ends of the prestressed steel bundles.

The foregoing is a further detailed description of the utility model in connection with the preferred embodiments, and it is not intended that the utility model be limited to the specific embodiments described. It will be apparent to those skilled in the art that several equivalent substitutions and obvious modifications can be made without departing from the spirit of the utility model, and the same should be considered to be within the scope of the utility model.

Claims (6)

1. A vertical prestressed tendon tensioning clamp, characterized by comprising:

the upper end of the nut sleeve (1) is used for butting the screw jack;

the upper end of the main screw rod (2) is abutted against the lower end of the nut sleeve (1);

the auxiliary screws (3) are positioned at two sides of the main screw (2);

a first steel anchor box (8) penetrated by the main screw (2);

the second steel anchor box (9) extends into the first steel anchor box (8) from bottom to top and is penetrated by the main screw (2) and the auxiliary screw (3);

a screw (4) which secures the first steel anchor box (8) and the second steel anchor box (9);

the first gear (5) is arranged in the second steel anchor box (9) and is fixedly sleeved on the main screw (2) and the auxiliary screw (3) respectively;

a second gear (6) which is meshed with the first gears (5), is arranged between two adjacent first gears (5), and is arranged in a second steel anchor box (9);

the working top (7) is coaxially arranged at the lower ends of the main screw (2) and the auxiliary screw (3) and is used for butting hexagonal nuts on the steel bars;

-a staple (10) fixed to the second steel anchor box (9) and slidingly engaging said second gear (6).

2. The vertical prestress steel beam tensioning clamp of claim 1, wherein the number of the bolts (4) is 4, the bolts are respectively positioned at four corners of the second steel anchor box (9), the upper ends of the bolts penetrate through the first steel anchor box (8), and the lower ends of the bolts penetrate through the second steel anchor box (9).

3. The vertical prestressed steel strand tensioning clamp of claim 1, characterized in that the number of clamps (10) is 2, which are respectively located at both sides of the main screw (2).

4. The vertical prestressed steel bundle tensioning clamp according to claim 1, characterized in that the first steel anchor box (8) is made of a high-strength clad steel plate with the thickness of 3-4 mm.

5. The vertical prestress steel beam tensioning clamp of claim 1, wherein the second steel anchor box (9) is made of a 1-2 mm thick iron plate.

6. The vertical prestressed steel strand tensioning clamp of claim 1, wherein said steel bar gauge is phi 16.

Images