CN106436587A - Chain link type automatic synchronous tensioning system and method for prestressed wire ropes - Google Patents

Abstract

The invention discloses a chain link type automatic synchronous tensioning system and method for prestressed wire ropes. The chain link type automatic synchronous tensioning system comprises an anchor plate, wherein the anchor plate is fixed on a structure to be reinforced through planted bars; a plurality of main threaded rods are arranged in the anchor plate in a parallel and penetrating manner; one end of each of the main threaded rods is connected with a corresponding screw sleeve, and the other end of each of the screw sleeves is connected with a corresponding steel wire rope; after the other end of each of the main threaded rods penetrates through a corresponding opening of the anchor plate, the other end of each of the main threaded rods is fixed by a corresponding anchoring toothed nut; a tensioning bracket is arranged on one side of the anchor plate; after the main threaded rods penetrate in the tensioning bracket, each of the main threaded rods is connected with a corresponding secondary threaded rod through a corresponding connecting sleeve; after the other ends of the secondary threaded rods penetrate out of the tensioning bracket, the other ends of the secondary threaded rods are separately fixed on the tensioning bracket by corresponding tensioning toothed nuts; and the anchoring toothed nuts and the tensioning toothed nuts are separately connected with a driving mechanism. According to the chain link type automatic synchronous tensioning system disclosed by the invention, anchoring a plurality of steel wire ropes can be realized through one anchor plate, so that the reinforcing efficiency and the reinforcing effect of a conventional structure are improved; and synchronous tensioning and synchronous locking are performed on all the steel wire ropes on the anchor plate, so that the situation that the bearing capacity is reduced due to uneven distribution of the prestressing force of the steel wire ropes is avoided, and the automatic synchronous tensioning system is convenient to use, and simple and high-efficiency to mount.

Description

System and method for automatic synchronous tensioning of chain-type prestressed steel wire rope

technical field

The invention relates to the technical field of civil engineering and transportation, in particular to an automatic synchronous stretching system and method for a chain-type prestressed steel wire rope.

Background technique

Due to the influence of material aging, construction quality, natural or man-made factors, many existing hollow slab structures of bridges and houses are in urgent need of repair and reinforcement, and countries all over the world spend huge sums of money on this every year. Existing structural reinforcement technologies mainly include enlarging section method, bonding steel reinforcement method, pasting fiber composite material reinforcement method, adding fulcrum reinforcement method, steel strand mesh-polymer mortar reinforcement method, etc. The existing reinforcement methods mainly have the following problems: (1) there is a stress hysteresis effect between the reinforcement material and the original component, and the joint work ability is poor, which greatly affects the reinforcement effect; (2) the anchorage length at the end of the reinforcement material is not enough, and it is easy to find Peeling damage, can not give full play to the material strength; (3) increase the cross-sectional size of the original components, increase the weight, affect the view and use. The prestressed steel wire rope reinforcement technology is a very good reinforcement technology, which has active reinforcement, no stress hysteresis effect, no peeling problem, and does not increase the cross-sectional size of the original component. However, the tensioning device and method of the existing prestressed steel wire rope reinforcement technology are not mature enough, and there are problems of inconvenient use, difficult installation and low efficiency in engineering applications. Therefore, there is an urgent need for a new prestressed steel wire rope automatic synchronous tensioning system and method to solve the above problems.

Contents of the invention

Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides an automatic synchronous tensioning system and method for chain-type prestressed steel wire ropes.

Technical solution: In order to solve the above technical problems, an automatic synchronous tensioning system of an endless chain type prestressed steel wire rope according to the present invention includes an anchor plate, which is fixed on the structure to be reinforced by planting bars; A main threaded rod, one end of the main threaded rod is connected with the threaded sleeve through an internal thread, and the other end of the threaded sleeve is connected with a wire rope; the other end of the main threaded rod passes through the opening of the anchor plate, and is fixed with an anchor toothed nut; There is a tensioning bracket on the side. After each main threaded rod penetrates into the tensioning bracket, it is respectively connected to the auxiliary threaded rod through the connecting sleeve. After the other end of the auxiliary threaded rod passes through the tensioning bracket, it is respectively fixed on the On the tensioning support; each anchoring toothed nut and the tensioning toothed nut are respectively connected to the driving mechanism.

Wherein, the driving mechanism includes two chains respectively connected with each anchoring toothed nut and tensioning toothed nut, the chain connected with the anchoring toothed nut is connected with the anchoring motor, and the chain connected with the tensioning toothed nut is connected with the tensioning motor.

Wherein, each of the anchoring toothed nuts and the tensioning toothed nuts is a nut with an internal thread hole in the center and teeth on the outer contour, and the teeth mesh with the chain.

Wherein, a force sensor is arranged between the tension bracket and the anchor plate.

One end of the threaded sleeve is provided with an axial internal thread hole, and the other end is provided with a radial hole. The axial internal thread hole is used to connect the main threaded rod. After the steel wire passes through the radial hole, it is anchored with an extruded anchor head.

A method for automatic synchronous tensioning of chain-type prestressed steel wire ropes, comprising the following steps:

(1) Drill holes at the corresponding positions of the structure to be reinforced, and install planting bars;

(2) Fix the anchor plate on the structure to be reinforced by planting bars;

(3) After the wire rope bypasses the opening of the threaded sleeve, it is anchored with an extruded anchor head;

(4) After passing the main threaded rod through the opening of the anchor plate, screw it into the internal thread of the threaded sleeve, and fix the other end of the main threaded rod with an anchor toothed nut;

(5) Put the tensioning bracket against the force sensors on both sides of the anchor plate, and the secondary threaded rod passes through the opening of the tensioning bracket and is connected to the front main threaded rod through the connecting sleeve;

(6) Install the tensioning toothed nuts on the secondary threaded rods in turn;

(7) After the wire ropes on all anchor plates are installed, install gears and chains on the tensioning motor and anchoring motor;

(8) Control the work of the tensioning motor, drive the rotation of the tensioning end chain and the tensioning toothed nut, thereby applying prestress to the steel wire rope, until the reading of the force sensor reaches the design tensioning force, and control the tensioning motor to stop;

(9) Control the anchoring motor to work, drive the chain at the anchoring end and the anchoring toothed nut to rotate until the anchoring motor stops rotating due to too much torque, thereby locking the threaded rod and controlling the anchoring motor to stop;

(10) Finally, remove the tensioning toothed nut, tensioning motor, anchoring motor, chain, gear, force sensor, connecting sleeve, secondary threaded rod and tensioning bracket.

Beneficial effects: An automatic synchronous tensioning system for chain-type prestressed steel wire ropes of the present invention has the following beneficial effects:

1. Multiple steel wire ropes can be anchored through one anchor plate, which greatly improves the reinforcement efficiency and effect of the existing structure;

2. Through the transmission device of motor, gear and chain, the automatic tensioning and automatic locking of the wire rope can be realized, which greatly saves labor costs and improves construction efficiency;

3. Synchronous tensioning and synchronous locking can be performed on all the steel wire ropes on the anchor plate at the same time, avoiding the problem of uneven prestress distribution of multiple steel wire ropes and resulting in reduced bearing capacity;

4. Tensioning toothed nuts, tensioning motors, anchoring motors, chains, gears, force sensors, connecting sleeves and tensioning brackets can be disassembled and reused, which saves a lot of reinforcement costs;

5. To sum up, the automatic synchronous tensioning system and method of the chain type prestressed steel wire rope have the characteristics of easy use, simple installation, fast and high efficiency.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Figure 2 is a top view of the tension bracket;

Fig. 3 is a side view of the tension bracket;

Figure 4 is a top view of the anchor plate;

Fig. 5 is a side view of the connection structure between the anchor plate and the structure to be reinforced.

In the figure: 1-anchor plate, 2-planting reinforcement, 3-steel wire rope, 4-threaded sleeve, 5-extruded anchor head, 6-main threaded rod, 7-tensioning bracket, 8-connecting sleeve, 9- Force sensor, 10-tension motor, 11-anchor motor, 12-tension toothed nut, 13-chain, 14-gear, 15-structure to be reinforced, 16-anchor motor, 17-secondary threaded rod.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings.

As shown in Figure 1, a chain-type prestressed steel wire rope automatic synchronous tensioning system includes an anchor plate 1, and the anchor plate 1 is fixed on the structure 15 to be reinforced by planting bars 2; The main threaded rod 6, one end of the main threaded rod 6 is connected with the threaded sleeve 4 through the internal thread, and the other end of the threaded sleeve is connected with the steel wire rope 3; after the other end of the main threaded rod 6 passes through the opening of the anchor plate 1, anchor the toothed nut 11 is fixed; one side of the anchor plate 1 is provided with a tension bracket 7, and after each main threaded rod 6 penetrates into the tension bracket 7, it is respectively connected to the secondary threaded rod 17 through the connecting sleeve 8, and the other end of the secondary threaded rod 17 passes through the tension bracket 7. After the bracket 7 is pulled, it is respectively fixed on the tension bracket 7 by the tension tooth nut 12; each anchor tooth nut 11 and the tension tooth nut 12 are respectively connected to the driving mechanism; A force sensor 9 is provided. The drive mechanism includes two chains connected with each anchor toothed nut 11 and tension tooth nut 12 respectively, the chain connected with the anchor tooth nut 11 is connected with the anchor motor 16, and the chain connected with the tension tooth nut 12 is connected with the The pulling motor 10, each anchoring toothed nut 11 and the tensioning toothed nut 12 are centrally provided with internally threaded holes, and the outer contour has toothed nuts, and the teeth and the chain mesh with each other. One end of the threaded sleeve 4 has an axial internal thread hole, and the other end has a radial hole. The axial internal thread hole is used to connect the main threaded rod 6. After the steel wire rope 3 passes through the radial hole, it is anchored by the extrusion anchor head 5 . The extruded anchor head 5 is made of soft material and has a hole inside. After the steel wire rope 3 passes through the extruded anchor head 5, the extruded anchor head 5 is squeezed with a tool to anchor the steel wire rope 3. In the present invention, the steel wire rope 3 is anchored by an extruded anchor head, and the other end is fixed on a beam or column.

The present invention also provides an automatic synchronous stretching method for chain-type prestressed steel wire ropes, which includes the following steps:

(1) punch holes at the corresponding positions of the structure to be reinforced 15, and install the planting bar 5;

(2) Fix the anchor plate 1 on the structure 15 to be reinforced by planting the reinforcement 2;

(3) After the steel wire rope 3 bypasses the opening of the threaded sleeve 4, it is anchored with the extrusion anchor head 5;

(4) After passing the main threaded rod 6 through the opening of the anchor plate 1, screw it into the internal thread of the threaded sleeve 5, and the other end of the main threaded rod 6 is fixed with an anchor toothed nut 11;

(5) The tensioning bracket 7 is pressed against the force sensor 9 on both sides of the anchor plate 1, and the secondary threaded rod 17 is connected to the front main threaded rod 6 through the connecting sleeve 8 after passing through the opening of the tensioning bracket 7;

(6) The tension toothed nut 12 is installed on the secondary threaded rod 17 in turn;

(7) After the steel wire ropes 3 on all the anchor plates 1 are installed, install the gear 14 and the chain 13 on the tensioning motor 10 and the anchoring motor 16;

(8) Control the tension motor 10 to work, drive the rotation of the tension end chain 13 and the tension toothed nut 12, thereby applying prestress to the steel wire rope 3, until the reading of the force sensor 9 reaches the design tension force, control the tension motor 10 stop;

(9) Control the anchoring motor 16 to work, drive the rotation of the anchoring end chain 13 and the anchoring toothed nut 11, until the anchoring motor 16 stops rotating because the torque is too large, thereby locking the threaded rod 6, and controlling the anchoring motor 16 to stop;

(10) Finally unload the tension toothed nut 12, the tension motor 10, the anchor motor 16, the chain 13, the gear 14, the force sensor 9, the connecting sleeve 8, the secondary threaded rod 17 and the tension bracket 7.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications are also possible. It should be regarded as the protection scope of the present invention.

Claims (6)

1. An automatic synchronous tensioning system for chain-type prestressed wire ropes, characterized in that: comprise an anchor plate (1), the anchor plate (1) is fixed on the structure to be reinforced (15) by planting bars (2); the anchor plate (1) A plurality of main threaded rods (6) are parallelly pierced inside, one end of the main threaded rods (6) is connected with the threaded sleeve (4), and the other end passes through the anchor plate (1), and is anchored with a toothed nut ( 11) Fixed on one side of the anchor plate (1); the other end of the threaded sleeve (4) is connected to the steel wire rope (3); one side of the anchor plate (1) is provided with a tension bracket (7), and each main threaded rod (6) passes through After entering the tensioning bracket (7), connect the auxiliary threaded rod (17) through the connecting sleeve (8) respectively, and after the other end of the auxiliary threaded rod (17) passes through the tensioning bracket (7), it is stretched with teeth respectively. The nuts (12) are fixed on the tensioning support (7); each anchor toothed nut (11) and the tensioning toothed nut (12) are respectively connected to the driving mechanism. 2. The automatic synchronous tensioning system of chain-type prestressed steel wire rope according to claim 1, characterized in that: wherein, the driving mechanism includes a motor that is connected to each anchoring toothed nut (11) and tensioning toothed nut (12) respectively. Two chains, the chain connected with the anchor toothed nut (11) is connected with the anchor motor (16), and the chain connected with the tension toothed nut (12) is connected with the tension motor (10). 3. The chain-type prestressed wire rope automatic synchronous tensioning system according to claim 2, wherein, each anchoring toothed nut (11) and tensioning toothed nut (12) are centrally opened with an inner A nut with threaded holes and teeth on the outer contour, the teeth mesh with the chain. 4. The chain-type prestressed steel wire rope automatic synchronous tensioning system according to claim 1, wherein a force sensor (9) is provided between the tensioning bracket (7) and the anchor plate (1). 5. The automatic synchronous tensioning system of chain type prestressed steel wire rope according to claim 1, characterized in that: wherein, one end of the threaded sleeve (4) has an axial internal thread hole, and the other end has a radial hole, The axial inner threaded hole is used to connect the main threaded rod (6), and after the steel wire rope (3) passes through the radial hole, it is anchored with an extruded anchor head (5). 6. An automatic synchronous tensioning method for chain-type prestressed steel wire ropes, characterized in that, comprising the following steps: (1) Drill holes at the corresponding positions of the structure to be reinforced (15), and install reinforcements (2); (2) Fixing the anchor plate (1) on the structure to be reinforced (15) by planting bars (2); (3) After the steel wire rope (3) walks around the opening of the threaded sleeve (4), it is anchored with an extruded anchor head (5); (4) After passing the main threaded rod (6) through the opening of the anchor plate (1), screw it into the internal thread of the threaded sleeve (5), and the other end of the main threaded rod (6) is anchored with a toothed nut ( 11) fixed; (5) Put the tensioning bracket (7) against the force sensors (9) on both sides of the anchor plate (1), and the secondary threaded rod (17) passes through the opening of the tensioning bracket (7) and then passes through the connecting sleeve (8) link to each other with the front main threaded rod (6); (6) Install the tensioning toothed nut (12) on the secondary threaded rod (17) in sequence; (7) After the steel wire ropes (3) on all anchor plates (1) are installed, gears (14) and chains (13) are installed on the tensioning motor (10) and the anchoring motor (16); (8) Control the work of the tensioning motor (10) to drive the rotation of the tensioning end chain (13) and the tensioning toothed nut (12), thereby applying prestress to the steel wire rope (3) until the reading of the force sensor (9) Reach design tensile force, control stretching motor (10) to stop; (9) Control the anchoring motor (16) to work, drive the anchoring end chain (13) and the anchor toothed nut (11) to rotate until the anchoring motor (16) stops rotating due to too much torque, thereby locking the threaded rod (6 ), control the anchoring motor (16) to stop; (10) Finally remove the tensioning toothed nut (12), tensioning motor (10), anchoring motor (16), chain (13), gear (14), force sensor (9), connecting sleeve (8) , secondary threaded rod (17) and tension support (7).