CN205077877U - Unbonded prestressed tendon repeated tensioning device - Google Patents

Abstract

The utility model discloses a repeat tensioner for unbonded prestressed tendons, which comprises an outer casing base, an outer casing, an inner casing base, an inner casing and a connector. The utility model has a simple structure, and one end of the connector is connected with a reserved steel strand. The other end is connected to the extended steel strand. The jacket and the base of the jacket are used to support the jack during tensioning, so that the tensioning hydraulic jack can apply tension to the extended steel strand to tension the reserved steel strand. The inner sleeve and the base of the inner sleeve are used for When transmitting the top pressure, the tensioning hydraulic jack supports the original working clip, and all parts work together to perform secondary tension on the too short reserved steel strand, saving materials and improving work efficiency at the same time. The post-earthquake repair and reinforcement of the non-bonded prestressed frame play a positive role in promoting; this tensioner has a connector inside, which has the advantages of short working length and short overall length of the tensioner itself compared with other tensioners; The inner and outer jackets of the tensioner are clearly distributed, easy to disassemble and install, easy to operate and reusable.

Description

A kind of unbonded prestressed tendon repetitive tensioner

technical field

The utility model relates to the field of concrete building materials, in particular to an unbonded prestressed tendon repeat tensioner.

Background technique

For decades, a large number of researches on the anti-seismic performance and anti-seismic design methods of prestressed structures have been carried out at home and abroad, and rich results have been obtained. Stress frames are divided into two types: unbonded and bonded. Unbonded means that the steel strands and concrete are not bonded together, which can be used for secondary tension in post-earthquake reinforcement; bonded means that the steel strands after tensioning The strands are bonded to the concrete and cannot be stretched again after an earthquake. When the unbonded prestressed tendon in the unbonded stress frame is anchored after the end of tension, the usual practice is to reserve a 40-50mm long reserved steel strand outside the anchor cap, plus the height of the anchor cap is 12mm Left and right, the operable total length of the reserved steel strand is between 50-62mm, and the working length of the tensioning hydraulic jack is more than 200mm, so it does not meet the conditions for direct tensioning of the tensioning hydraulic jack. To meet the requirements of repeated tensioning, we have designed a tensioner specially designed for repeated tensioning of unbonded prestressed tendons to meet the requirements of jacks for repeated tensioning of steel strands.

Contents of the invention

The technical problem to be solved by the utility model is to provide a non-bonding prestressed tendon repeat tensioner, which solves the problem that the operable total length of the steel strand reserved in the prior art does not meet the requirements of the tension hydraulic jack for direct tensioning. question.

The utility model is realized through the following technical solutions:

A non-bonding prestressed tendon repeat tensioner, including an outer casing base, an outer casing, an inner casing base, an inner casing and a connector, the left end of the outer casing base is provided with an anchor give way groove, and the right end is provided with a sleeve body insertion groove , There is a partition between the anchor give way groove and the casing insertion groove, the partition is provided with a through hole for the outer casing base, the left end of the inner casing is provided with a connector slot, and the right end is provided with an inner casing boss , the inner sleeve boss is provided with an inner sleeve through hole, the left end of the outer sleeve is provided with an inner sleeve card slot, and the right end is provided with an outer sleeve boss, the outer sleeve boss is provided with an outer sleeve through hole, and the outer sleeve base card On the anchorage, the steel strand is reserved to pass through the through hole of the outer base, and after being put on the base of the inner sleeve, it is connected with the extended steel strand by a connector. The inner sleeve is stuck on the connector, and the outer sleeve On the inner sleeve, its left end is threadedly connected with the insertion groove of the sleeve body, and the right end of the extended steel strand passes through the through hole of the inner sleeve.

The further improvement of the utility model is that the connector includes a connector anchor, a connector clip and a connector jacket, and the two ends of the connector jacket are provided with threaded holes, and the two ends are respectively threaded with the connector anchor. Connection, wherein the connector anchor at the left end clamps the reserved steel strand through the connector clip, and the connector anchor at the right end clamps the extended steel strand through the connector clip.

The further improvement of the utility model is that the left end of the inner sleeve base is provided with a base boss, and the right end is provided with a base slot, and the base boss and the base slot are connected through a second boss, and the second boss is A spring is connected, the base boss is provided with a base through hole, and the length of the inner sleeve base is 27 mm.

The further improvement of the utility model is that the boss of the inner sleeve passes through the through hole of the outer jacket, the length of the boss of the inner sleeve is 50 mm, and the total length of the inner sleeve is 303 mm.

The further improvement of the utility model is that the length of the boss of the jacket is 20 mm, the total length of the jacket is 330 mm, the total length of the base of the jacket is 88 mm, and the depth of the anchorage relief groove is 48 mm.

Compared with the prior art, the utility model has the following advantages:

1. The structure of the utility model is simple. One end of the connector is connected to the reserved steel strand, and the other end is connected to the extended steel strand. The jacket and the jacket base are used to support the jack during tension, so that the tensioning hydraulic jack can apply force to the extended steel strand. The tension is based on tensioning the reserved steel strands. The inner sleeve and the base of the inner sleeve are used to transmit the supporting force of the tensioning hydraulic jack on the original working clip when the top pressure is applied. Secondary tensioning of wires, while saving materials and improving work efficiency, it plays a positive role in promoting the post-earthquake repair and reinforcement of unbonded prestressed frames;

2. There is a connector inside the tensioner, which has the advantages of short working length and the total length of the tensioner itself compared with other tensioners;

3. The inner and outer jackets of the tensioner are clearly distributed, easy to disassemble and install, easy to operate, and reusable.

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

Description of drawings

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

Fig. 2 is a schematic diagram of the base of the outer cover, the outer cover, the base of the inner cover and the inner cover.

Figure 3 is a schematic diagram of the connector.

detailed description

As shown in Fig. 1, Fig. 2 and Fig. 3, the utility model includes an outer casing base 1, an outer casing 4, an inner casing base 3, an inner casing 5 and a connector 01, and the left end of the outer casing base 1 is provided with an anchor give way groove 11. The right end is provided with a sleeve body insertion groove 13, and a partition is provided between the anchorage relief groove 11 and the sleeve body insertion groove 13. The partition board is provided with an outer cover base through hole 12, and the left end of the inner sleeve 5 is provided with a There is a connector slot 51, the right end of which is provided with an inner sleeve boss 52, the inner sleeve boss 52 is provided with an inner sleeve through hole 53, the left end of the outer cover 4 is provided with an inner sleeve slot 41, and the right end is provided with The overcoat boss 42 is provided with an overcoat through hole 43 inside the overcoat boss 42. The overcoat base 1 is stuck on the anchorage 102, and the reserved steel strand 10 passes through the through hole 12 of the overcoat base, and the inner cover base 3 is put on. Finally, it is connected with the lengthened steel strand 6 by the connector 01, the inner sleeve 5 is stuck on the connector 01, the outer sleeve 4 is placed on the inner sleeve 5, and its left end is threadedly connected with the sleeve body insertion groove 13, The right end of the lengthened steel strand 6 passes through the inner sleeve through hole 53, and the connector 01 includes a connector anchor 7, a connector clip 8 and a connector jacket 9, and the two ends of the connector jacket 9 are provided with threads The two ends of the hole are respectively threaded with the connector anchor 7, wherein the connector anchor 7 at the left end clamps the reserved steel strand 10 through the connector clip 8, and the connector anchor 7 at the right end is connected The device clip 8 clamps the lengthened steel strand 6, the left end of the inner sleeve base 3 is provided with a base boss 31, and its right end is provided with a base slot 34, and the base boss 31 and the base slot 34 pass through the second boss 32, the second boss 32 is connected with a spring 2, the base boss 31 is provided with a base through hole 33, the length of the inner sleeve base 3 is 27mm, and the inner sleeve boss 52 passes through the outer sleeve Through hole 43, the length of the inner cover boss 52 is 50mm, the total length of the inner cover 5 is 303mm, the length of the outer cover boss 42 is 20mm, the total length of the outer cover 4 is 330mm, and the outer cover 4 has a total length of 330mm. The total length of the base 1 is 88mm, wherein the depth of the anchorage relief groove 11 is 48mm.

After removing the anchor cap of the original anchor 102, put the outer base 1 and inner base 3 of the unbonded prestressed tendon repeat tensioner on the reserved steel strand 10 in turn, and the outer base 1 is covered by the anchor pad The plate 103 is positioned with the original anchorage 102, and the extended steel strand 6 and the reserved steel strand 10 are connected with the connector 01 built in the tensioner, and then the inner sleeve 5 and the outer sleeve 4 are put on in sequence, and the hydraulic jack is tensioned. The overcoat boss 42 that withstands the right end of the overcoat 4 applies tension to the lengthened steel strand 6 to tension the reserved steel strand 10. After the tension is completed, the tension hydraulic jack carries out top pressure, and the inner sleeve and the inner sleeve base are used to transfer tension. Pull the supporting force of the hydraulic jack on the original working clip 101. After the original working clip 101 is pushed to the proper position, the pressing is completed. Remove the tensioning hydraulic jack and tensioner, tighten the anchor cap, and the tensioning is completed. . All parts work together to carry out secondary tensioning on the too short reserved steel strands, which saves materials and improves work efficiency, and plays a positive role in promoting the post-earthquake repair and reinforcement of unbonded prestressed frames ;There is a connector 01 inside this tensioner. Compared with other tensioners, it has the advantages of short working length and the total length of the tensioner itself; reuse.

It should be pointed out that for those skilled in the art, without departing from the principle of the utility model, some improvements and modifications can also be made, and these improvements and modifications should also be regarded as the scope of protection of the utility model .

Claims (5)

1. a unbonded prestressing tendon repeat stretch-draw device, it is characterized in that: comprise housing base (1), overcoat (4), inner sleeve base (3), inner sleeve (5) and connector (01), the left end of described housing base (1) is provided with ground tackle slot to make way (11), right-hand member is provided with cover body insertion groove (13), dividing plate is provided with between ground tackle slot to make way (11) and cover body insertion groove (13), this dividing plate is provided with housing base through hole (12), the left end of described inner sleeve (5) is provided with connector draw-in groove (51), its right-hand member is provided with inner sleeve boss (52), inner sleeve through hole (53) is provided with in this inner sleeve boss (52), the left end of described overcoat (4) is provided with inner sleeve draw-in groove (41), its right-hand member is provided with overcoat boss (42), overcoat through hole (43) is provided with in this overcoat boss (42), described housing base (1) is stuck on ground tackle (102), reserved steel strand (10) are through housing base through hole (12), after putting inner sleeve base (3), by connector (01), it is connected with lengthening steel strand (6), described inner sleeve (5) is stuck on connector (01), described overcoat (4) is placed in inner sleeve (5), its left end is threaded with cover body insertion groove (13), lengthen the right-hand member of steel strand (6) through inner sleeve through hole (53).

2. a kind of unbonded prestressing tendon repeat stretch-draw device according to claim 1, it is characterized in that: described connector (01) comprises connector anchor (7), connector intermediate plate (8) and connector jacket (9), the two ends of described connector jacket (9) are provided with screwed hole, its two ends are threaded with connector anchor (7) respectively, wherein, be positioned at the connector anchor (7) of left end by the reserved steel strand (10) of connector intermediate plate (8) clamping, the connector anchor (7) being positioned at right-hand member lengthens steel strand (6) by connector intermediate plate (8) clamping.

3. a kind of unbonded prestressing tendon repeat stretch-draw device according to claim 1, it is characterized in that: the left end of described inner sleeve base (3) is provided with base boss (31), its right-hand member is provided with base draw-in groove (34), base boss (31) is connected by the second boss (32) with base draw-in groove (34), this second boss (32) is connected with spring (2), described base boss (31) is provided with base plate through holes (33), and the length of described inner sleeve base (3) is 27mm.

4. a kind of unbonded prestressing tendon repeat stretch-draw device according to claim 1, is characterized in that: described inner sleeve boss (52) is through overcoat through hole (43), and the length of this inner sleeve boss (52) is 50mm, and the total length of described inner sleeve (5) is 303mm.

5. a kind of unbonded prestressing tendon repeat stretch-draw device according to claim 1, it is characterized in that: the length of described overcoat boss (42) is 20mm, the total length of described overcoat (4) is 330mm, the total length of described housing base (1) is 88mm, wherein, the degree of depth of ground tackle slot to make way (11) is 48mm.