CN209816674U - A prestressed tension jack installation tool in the cast-in-place box girder box - Google Patents

Abstract

The utility model discloses a prestressed tensioning jack installation tool in a cast-in-place box girder box chamber, which solves the technical problems of low installation efficiency, large site occupation and waste of labor force for the jack applicable to cast-in-situ prestressed box girder tensioning. The utility model comprises a support frame arranged above the cast-in-place box girder, the support frame is a hollow pipe, the lower end of the pipe is provided with a bolt, and the lower end of the pipe is inserted in a reserved hole on the top of the cast-in-place box girder and The bolt is stopped above the reserved hole, the upper end of the pipe is provided with a hoisting hoist, the hoisting steel wire rope of the hoisting hoist runs through the upper end of the pipe to the lower end of the pipe, and the free end of the hoisting steel wire is provided with a articulated prestressed tensioner. The hook of the pulling jack is provided with a guide pipe inserted in the center hole of the prestressed tensioning jack under the reserved hole of the cast-in-situ box girder. The utility model not only has a simple structure and is easy to manufacture, but also occupies a small area of the work site for installation and has high use efficiency.

Description

A prestressed tension jack installation tool in the cast-in-place box girder box

technical field

The utility model relates to the technical field of cast-in-place box girder construction, in particular to a prestressed tension jack installation tool in a cast-in-place box girder box chamber.

Background technique

In the construction of cast-in-place prestressed box girders, the tension section of the roof steel strand is often arranged inside the box chamber. Due to the heavy weight of the jacks used in the prestressed tensioning of the cast-in-situ box girder, and the limited space for the construction personnel inside the box girder, the installation of the jacks not only consumes a lot of labor, but also seriously affects the construction progress.

There are two installation methods currently used on the construction site: a jack bracket is set up inside the box chamber and a jack hoisting bracket is set up on the top of the box girder. It is necessary to control the inclination angle of the bracket well to set up the jack bracket inside the box room, and the use efficiency of the bracket is low. Every time a bundle is pulled, a bracket needs to be erected, which takes a long time and seriously affects the construction progress; in the box room The jack hoisting bracket is set up on the top surface, although the utilization rate is high, but the jack hoisting bracket requires a large work site, and the hoisting bracket is often cumbersome, and it also consumes more labor when moving.

Utility model content

Aiming at the deficiencies in the above-mentioned background technology, the utility model proposes a prestressed tension jack installation tool in the cast-in-place box girder box chamber, which solves the problems of low installation efficiency, large space occupation and waste Labor technical issues.

The technical scheme of the utility model is realized in the following way: a prestressed tension jack installation tool in the cast-in-place box girder box chamber, including a support frame arranged above the cast-in-place box girder, the support frame is a hollow pipe, and the pipe is used as The support frame can effectively reduce the installation area. The lower end of the pipe is provided with a bolt, and the lower end of the pipe is inserted into the reserved hole on the top of the cast-in-place box girder and the bolt stops above the reserved hole. The reserved hole can realize the horizontal fixing of the pipe, and the bolt can realize the vertical fixing of the pipe. Through the fixing function of the reserved hole and the bolt, the positional stability of the pipe relative to the cast-in-place box girder can be fully guaranteed. The upper end of the pipe is provided with a hoist, and the hoisting wire rope of the hoist runs through the upper end of the pipe to the lower end of the pipe, and the free end of the hoisting wire rope is provided with a hook for hanging a prestressed tension jack. By operating the hoisting hoist, the hoisting wire rope can be shrunk up and down along the interior of the pipe, and then the prestressed tension jack can be lifted through the hook. Below the reserved hole of the cast-in-place box girder, there is a guide pipe interspersed in the center hole of the prestressed tension jack. Corresponding questions.

Further, the hoisting hoist is a hand hoist, and the hand hoist includes a shell fixedly connected to the end of the pipe, a hand shaft and a winch shaft are arranged in parallel in the shell, a driving pinion is arranged on the hand shaft, and a drive pinion is arranged on the winch shaft A reduction bull gear meshed with the drive pinion is provided. Through the meshing of the driving pinion and the reduction gear, relatively small force can be used to output relatively large torque, which can effectively reduce the labor force for lifting the prestressed tension jack. The winch shaft is provided with a winch winding the hoisting wire rope, and an L-shaped handle connected to the hand shaft is arranged outside the outer shell, and the L-shaped handle effectively improves the convenience of lifting the prestressed tension jack.

Further, the hand shaft is axially slidably arranged on the housing, the hand shaft is provided with a brake gear, and the housing is provided with a brake block that is movably engaged with the brake gear. By pulling the hand shaft, the engagement mode and braking mode can be adjusted conveniently, which can effectively prevent the hand shaft from reversing.

Further, the hoisting hoist is an electric hoist, and the electric hoist can further reduce the labor intensity of construction personnel compared with the hand hoist.

Further, the upper end or/and the lower end of the pipe are provided with a fixed pulley matched with the hoisting wire rope, the setting of the fixed pulley can effectively reduce the friction between the hoisting wire rope and the pipe, and further reduce the labor intensity of the construction personnel , while reducing friction noise.

Further, the lower end of the pipe is provided with several pin holes in parallel, and the pins can be selected to cooperate with different pin holes, so as to meet the construction requirements of cast-in-place box girders with different thicknesses.

The utility model not only has a simple structure and is easy to manufacture, but also occupies a small area of the work site for installation and has high use efficiency, and can hoist and install the prestressed tension jack conveniently and labor-savingly. In addition, the utility model can also guide when hoisting the prestressed tension jack, which further saves construction labor force and further improves construction efficiency. Through the guiding function, the disadvantage of repeatedly installing the support frame at different positions is avoided, and the utilization rate of the support frame is effectively improved.

Description of drawings

In order to illustrate the embodiment of the utility model more clearly, the accompanying drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the utility model. Those of ordinary skill in the art can also obtain other drawings based on these drawings without any creative effort.

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the sectional view of Fig. 1;

Fig. 3 is an enlarged view of the hoist hoist in Fig. 1 .

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Embodiment 1, a prestressed tension jack installation tool in the cast-in-place box girder box chamber, as shown in Figure 1 and Figure 2, includes a support frame 1 arranged above the cast-in-place box girder, and the support frame 1 is hollow Pipes, pipes as a support frame can effectively reduce the installation area. The lower end of the pipe is provided with a bolt 2, and the lower end of the pipe is inserted into a reserved hole on the top of the cast-in-place box girder and the bolt 2 stops above the reserved hole. The reserved hole can realize the horizontal fixing of the pipe, and the bolt can realize the vertical fixing of the pipe. Through the fixing function of the reserved hole and the bolt, the positional stability of the pipe relative to the cast-in-place box girder can be fully guaranteed.

A hoisting gourd 3 is arranged on the upper end of the pipe, and a reinforcing steel plate 1-3 is arranged between the hoisting gourd 3 and the pipe. The hoisting wire rope 4 of the hoisting hoist 3 runs through from the upper end of the pipe to the lower end of the pipe, and the free end of the hoisting wire rope 4 is provided with a hook 5 for hooking a prestressed tension jack. By operating the hoisting hoist 3, the hoisting wire rope can be shrunk up and down along the inside of the pipe, and then the prestressed tension jack can be lifted through the hook 5.

As shown in Figure 3, the hoisting hoist 3 is a hand hoist, and the hand hoist includes a shell 3-1 fixedly connected to the end of the pipe, and a hand shaft 3-2 and a winch shaft 3 are arranged in parallel in the shell 3-1 -3, the hand shaft 3-2 is provided with a drive pinion 3-4, and the capstan shaft 3-3 is provided with a deceleration bull gear 3-5 meshing with the drive pinion 3-4. Through the meshing of the driving pinion and the reduction gear, relatively small force can be used to output relatively large torque, which can effectively reduce the labor force for lifting the prestressed tension jack. The capstan shaft 3-3 is provided with a capstan 3-6 winding the hoisting wire rope 4, and the outer shell 3-4 is provided with an L-shaped handle 3-9 connected to the hand shaft 3-2, and the L-shaped handle 3-9 effectively improves the convenience of lifting the prestressed tension jack.

Below the reserved hole of the cast-in-place box girder, there is a guide pipe interspersed in the center hole of the prestressed tension jack. The guide pipe can guide the hoisting of the prestressed tension jack, which solves the problem of the position and installation of the prestressed tension jack before hoisting. The problem that the position does not correspond to the upper and lower sides avoids the disadvantages of repeatedly installing the support frame at different positions, and effectively improves the utilization rate of the support frame.

The use process of the utility model is as follows: the operator stands on the top surface of the box girder, adjusts the position of the pin 2 according to the thickness of the top plate of the box girder, installs the bottom of the pipe into the reserved hole on the top surface of the box girder, and puts the 4 ends of the hoisting wire rope The hook 5 at the top is connected to the prestressed tension jack, one end of the guide tube is inserted into the steel strand, and the other end passes through the center hole of the prestressed tension jack; the operator shakes the crank handle 3-9 of the hand hoist, and the power passes through The steel wire rope is passed to the prestressed tension jack, and the prestressed tension jack moves upward along the guide tube until the prestressed tension jack moves to the tension installation position; after the tension is completed, shake the handle 3-9 in the opposite direction, and The stress tension jack is slowly unloaded to the bottom of the box girder under the action of gravity to complete the whole operation.

Embodiment 2, a prestressed tension jack installation tool in the cast-in-situ box girder box chamber, the hand shaft 3-2 is axially slidably arranged on the shell 3-1, and the hand shaft 3-2 is provided with a brake For the gear 3-7, the housing 3-1 is provided with a brake block 3-8 that is movably engaged with the brake gear 3-7. By pulling the hand shaft, the engagement mode and braking mode can be adjusted conveniently, which can effectively prevent the hand shaft from reversing.

Other structures of this embodiment are the same as those of Embodiment 1.

Embodiment 3 is an installation tool for a prestressed tension jack in a cast-in-situ box girder box. The hoisting hoist 3 is an electric hoist, and the electric hoist can further reduce the labor intensity of construction personnel compared with the hand hoist.

Other structures of this embodiment are the same as those of Embodiment 1.

Embodiment 4, a prestressed tension jack installation tool in the cast-in-situ box girder box chamber, the upper end and the lower end of the pipe are provided with a fixed pulley 1-1 that matches the hoisting wire rope 4, and the fixed pulley 1-1 The setting can effectively reduce the frictional force between the hoisting wire rope 4 and the pipe material, further reduces the labor intensity of construction personnel, and can reduce frictional noise at the same time.

Other structures of this embodiment are the same as Embodiment 1 or 2 or 3.

Embodiment 5, a prestressed tension jack installation tool in the cast-in-place box girder box chamber, the lower end of the pipe is provided with a number of pin holes 1-2 in parallel, and the pin 2 can be selected from different pin holes 1-2. In order to meet the construction needs of cast-in-place box girders with different thicknesses.

Other structures of this embodiment are the same as Embodiment 1 or 2 or 3 or 4.

The non-exhaustive parts of the utility model are conventional technical means known to those skilled in the art.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in the Within the protection scope of the present utility model.

Claims (6)

1. The utility model provides an indoor prestressing force stretch-draw jack mounting tool of cast-in-place box girder box, is including setting up support frame (1) in cast-in-place box girder top, its characterized in that: the support frame (1) is a hollow pipe, a bolt (2) is arranged at the lower end of the pipe, the lower end of the pipe is inserted into a preformed hole in the top of the cast-in-place box girder, the bolt (2) is blocked above the preformed hole, a hoisting hoist (3) is arranged at the upper end of the pipe, a hoisting steel wire rope (4) of the hoisting hoist (3) penetrates through the lower end of the pipe from the upper end of the pipe, a hook (5) for hooking a prestress tensioning jack is arranged at the free end of the hoisting steel wire rope (4), and a guide pipe penetrating in the central hole of the prestress tensioning jack is arranged below the preformed hole of the cast-in-place box girder.

2. The indoor prestress tensioning jack installation tool for the cast-in-place box girder box of claim 1, wherein: the hoisting hoist (3) is a hand hoist, the hand hoist comprises a shell (3-1) fixedly connected to the end of a pipe, a hand crank shaft (3-2) and a winch shaft (3-3) are arranged in the shell (3-1) in parallel, a driving small gear (3-4) is arranged on the hand crank shaft (3-2), a decelerating large gear (3-5) meshed with the driving small gear (3-4) is arranged on the winch shaft (3-3), a winch (3-6) for winding the hoisting steel wire rope (4) is arranged on the winch shaft (3-3), and an L-shaped crank (3-9) connected with the hand crank shaft (3-2) is arranged outside the shell.

3. The indoor prestress tensioning jack installation tool for the cast-in-place box girder box of claim 2, wherein: the hand rocking shaft (3-2) is axially arranged on the shell (3-1) in a sliding mode, the hand rocking shaft (3-2) is provided with a brake gear (3-7), and the shell (3-1) is provided with a brake block (3-8) movably clamped with the brake gear (3-7).

4. The indoor prestress tensioning jack installation tool for the cast-in-place box girder box of claim 1, wherein: the hoisting hoist (3) is an electric hoist.

5. The indoor prestress tensioning jack installation tool for a cast-in-place box girder according to any one of claims 1 to 4, wherein: the upper end part or/and the lower end part of the pipe is/are provided with fixed pulleys (1-1) matched with the hoisting steel wire rope (4).

6. The indoor prestress tensioning jack installation tool for the cast-in-place box girder box of claim 5, wherein: the lower end part of the pipe is provided with a plurality of bolt holes (1-2) in parallel.