CN217353209U - Novel fine rolling twisted steel stretch-draw anchor device - Google Patents
Novel fine rolling twisted steel stretch-draw anchor device Download PDFInfo
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- CN217353209U CN217353209U CN202220580181.XU CN202220580181U CN217353209U CN 217353209 U CN217353209 U CN 217353209U CN 202220580181 U CN202220580181 U CN 202220580181U CN 217353209 U CN217353209 U CN 217353209U
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Abstract
The utility model relates to a novel finish rolling twisted steel stretch-draw anchor device relates to construction technical field. The novel finish rolling threaded steel bar tensioning and anchoring device comprises a nut mounting head, an extension sleeve, a steel bar connecting sleeve, an operating rod and a jack, wherein the nut mounting head is provided with a nut trepanning matched with a nut to be anchored; the lengthened sleeve is detachably connected with the nut mounting head and is in rotation-stopping fit with the nut mounting head; or the lengthened sleeve and the nut mounting head are integrally formed; at least two jacks are uniformly distributed in the circumferential direction of the lengthened sleeve, and the axes of the jacks are vertical to the axis of the lengthened sleeve; the steel bar connecting sleeve is coaxially arranged in the lengthened sleeve and is connected with the prestressed steel bar to be tensioned, and the force transmission steel bar is coaxially connected in the steel bar connecting sleeve; the operating rod is used for being inserted into the corresponding jack, and the jack clamps the force transmission reinforcing steel bar. The utility model overcomes a difficult problem is screwed up to the stretch-draw nut, has guaranteed stretch-draw quality and construction safety, has reduced prestressing loss.
Description
Technical Field
The utility model relates to a novel finish rolling twisted steel stretch-draw anchor device.
Background
In the prior art, pre-reserved anchor boxes need to be installed before concrete pouring in prestressed reinforcement tensioning, and therefore the tied reinforcing steel bars need to be cut off, so that the anchor boxes can be conveniently installed. The construction method destroys the integral stability of the structure and is not beneficial to the stress of the anchoring end, and if the tensile force is larger, the stress concentration phenomenon occurs at the anchoring end, thus damaging the structure. And when the anchor is sealed, the ratio of the joint surfaces of the new and old concrete is larger, and because the shrinkage and creep of the new and old concrete are different, cracks appear on the joint surfaces, and the durability of the structure is influenced. When the prestressed reinforcement is tensioned to the designed prestress, the nut needs to be screwed down to prevent the loss of the prestress. However, since the space for reserving the anchor box is reduced, effective instruments cannot be used for nut anchoring, which results in that the nut cannot achieve the required anchoring degree as required, thereby causing great prestress loss. When the nut is anchored, because the jack and the steel bar are still in a stretching state, if the nut is carelessly operated, the nut is easy to be out of anchor, and the life safety of constructors is seriously threatened. Therefore, a novel, efficient and convenient pre-stressed tension anchor fixing device is urgently needed to overcome the problems in tension construction and complete the tension construction safely and qualitatively.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a novel finish rolling twisted steel stretch-draw anchor to solve among the prior art and carrying out the in-process of stretch-draw to the prestressing steel, the technical problem that the nut can not effectively anchor.
In order to achieve the above object, the utility model adopts the following technical scheme:
the utility model provides a novel finish rolling twisted steel stretch-draw anchor device, includes:
the nut mounting head is provided with a nut sleeve hole matched with a nut to be anchored;
the lengthening sleeve is detachably connected with the nut mounting head and is in rotation stop fit with the nut mounting head; or the lengthened sleeve and the nut mounting head are integrally formed; at least two jacks which are uniformly distributed are arranged in the circumferential direction of the lengthened sleeve, and the axes of the jacks are vertical to the axis of the lengthened sleeve;
the steel bar connecting sleeve is coaxially arranged in the lengthened sleeve and is connected with the prestressed steel bar to be tensioned, and a force transmission steel bar is also coaxially connected in the steel bar connecting sleeve;
the operating rods are used for being inserted into the corresponding jacks;
and the jack is arranged on one side of the lengthened sleeve, which is far away from the nut mounting head, and clamps the force transmission steel bar.
Preferably, the lengthening sleeve is connected with the nut mounting head in a plugging manner.
Furthermore, one end of the lengthened sleeve is provided with a plurality of tooth sockets which are uniformly distributed along the circumferential direction of the lengthened sleeve, the circumferential direction of the corresponding end of the nut mounting head is provided with gear shaping which corresponds to the tooth sockets one by one, and the gear shaping is correspondingly matched with the tooth sockets in an inserting manner.
Furthermore, the nut mounting head comprises a large-diameter section and a small-diameter section which are coaxially arranged, the small-diameter section is provided with the nut sleeve hole, and the large-diameter section is provided with the gear shaping.
Furthermore, at least two rows of jacks are arranged in the axial direction of the lengthening sleeve, and each row of jacks comprises at least two jacks uniformly arranged in the circumferential direction of the lengthening sleeve.
Furthermore, one side of the jack, which is back to the lengthened sleeve, is provided with a jacking plate fixedly connected with the force transmission steel bar, and the jacking plate is propped against the surface of the jack.
The beneficial effects of the above technical scheme are:
1. the nut mounting head is provided with a nut trepanning which can be tightly connected with a nut, and the nut is anchored with high quality by the torque transmitted from the lengthened sleeve after tensioning is finished, so that the anchoring requirement is met;
2. the plurality of jacks are arranged on the circumference of the lengthening sleeve, after the jack is tensioned to the required prestress, the operating rod is inserted into the corresponding jack, and the torque can be transmitted to the nut through the lengthening sleeve and the nut mounting head by rotating the operating rod, so that the nut is effectively anchored, the anchoring quality is ensured, convenience and rapidness are realized, the defect that the nut cannot be anchored by using an effective instrument in the past is overcome, and the loss of the prestress is reduced;
3. when the nut is anchored, the force application position of a worker is positioned outside the concrete structure, the space size of the anchor box and the anchoring space do not need to be considered, and a larger construction operation space is provided, so that the nut is conveniently anchored;
4. the size of the reserved anchor box can be reduced, the combination area of new and old concrete is correspondingly reduced when the anchor end seals the anchor, the probability that the new and old concrete shrinks, creeps and does not synchronize at the combination position is reduced, and the number and the sectional area of the reinforcing steel bars needing to be cut off when the anchor box is installed can be correspondingly reduced due to the reduction of the size of the anchor box, so that the damage degree to a structure is reduced, and the safety of the structure is improved;
5. when the nut is anchored, the tensioning devices such as a jack and the like cannot be touched, so that the safety of constructors is guaranteed.
Drawings
Fig. 1 is a schematic structural view of embodiment 1 of the novel finish rolling twisted steel bar tension anchoring device of the present invention;
fig. 2 is a schematic structural view of an elongated sleeve in embodiment 1 of the novel finish-rolled twisted steel bar tension anchoring device of the present invention;
fig. 3 is a schematic structural view of a nut mounting head in embodiment 1 of the novel finish-rolled twisted steel bar tension anchoring device of the present invention;
fig. 4 is the structure schematic diagram of the novel finish rolling twisted steel tensioning and anchoring device of embodiment 2.
Description of reference numerals: 1-nut mounting head, 2-large diameter section, 3-small diameter section, 4-gear shaping, 5-nut trepanning, 6-steel bar connecting sleeve, 7-lengthening sleeve, 8-jack, 9-tooth space, 10-operating rod, 11-jack, 12-force transmission steel bar, 13-nut, 14-top pressure plate, 15-prestressed steel bar and 201-nut mounting cylinder.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The utility model discloses a finish rolling twisted steel stretch-draw anchor 1:
as shown in fig. 1, the novel tension anchoring device for finish rolling twisted steel comprises a nut mounting head 1, an extension sleeve 7, a steel bar connecting sleeve 6, an operating rod 10, a jack 11 and a top pressure plate 14.
Specifically, as shown in fig. 1, the extension sleeve 7 is inserted into the nut mounting head 1 and assembled. As shown in fig. 2, one end of the extension sleeve 7 is provided with a plurality of teeth grooves 9 uniformly distributed in the circumferential direction thereof. As shown in fig. 3, the nut mounting head 1 is of a diameter-variable structure and comprises a large-diameter section 2 and a small-diameter section 3 which are coaxially arranged, wherein the periphery of one end, far away from the small-diameter section 3, of the large-diameter section 2 is provided with gear shaping teeth 4 which are in one-to-one correspondence with the gear slots 9, and the gear shaping teeth 4 are correspondingly inserted and matched with the gear slots 9; the small-diameter section 3 is internally provided with a nut trepan 5 which is matched with a nut 13 to be anchored and has an inner hexagonal shape. The nut mounting head 1 with the reducing structure is beneficial to saving space and reducing the use of manufacturing materials.
Three rows of jacks are arranged in the axial direction of the lengthening sleeve 7, each row of jacks comprises six jacks 8, the six jacks 8 are uniformly arranged in the circumferential direction of the lengthening sleeve 7, and the axes of the jacks 8 are perpendicular to the axis of the lengthening sleeve 7. The operating rod 10 is adapted to be inserted into the corresponding socket 8 in use, thereby rotating the extension sleeve 7 and thereby transmitting torque to the nut mounting head 1 to anchor the nut 13.
The steel bar connecting sleeve 6 is coaxially arranged in the extension sleeve 7, but has no connection relation with the extension sleeve 7. One end of the steel bar connecting sleeve 6 is connected with a prestressed steel bar 15 to be tensioned, and the other end of the steel bar connecting sleeve 7 is also coaxially connected with a force transmission steel bar 12.
A jack 11 is arranged on the side of the extension sleeve 7 remote from the nut mounting head 1 and clamps the force-transmitting reinforcement 12. And a top pressure plate 14 fixedly connected with the force transmission steel bar 12 is arranged on one side of the jack 11, which is back to the lengthening sleeve 7, and the top pressure plate 14 is abutted against the surface of the jack 11 so as to limit the movement of the jack 11 relative to the force transmission steel bar 12 and ensure the tensioning effect.
The utility model discloses a use: 1. when the prestressed reinforcement 15 is tensioned, the nut mounting head 1 is sleeved on the nut 13 to be anchored; 2. installing a steel bar connecting sleeve 6, then installing a lengthened sleeve 7 on the steel bar connecting sleeve 6 and inserting and matching the lengthened sleeve with the nut installing head 1; 3. connecting the force transmission steel bar 12 with the steel bar connecting sleeve 6, and finally installing a top pressure plate 14 and a jack 11; 4. after the jack 11 is tensioned to the required prestress, the operating rod 10 is inserted into the corresponding jack 8 of the lengthening sleeve 7, the operating rod 10 is rotated clockwise, the lengthening sleeve 7 is stressed, and the torque is transmitted to the nut mounting head 1 through the tooth key connection, so that the nut 13 is tightened; 5. and after tensioning is finished, sequentially taking down the jack 11, the jacking plate 14, the lengthened sleeve 7, the steel bar connecting sleeve 6 and the nut mounting head 1.
Because a proper tool is not needed for anchoring the nut in the prior art, a wrench is usually used for anchoring during construction, but the nut 13 cannot be effectively anchored due to the size of an anchor box and the limit value of the force arm of the wrench, so that the greater prestress loss is caused, and the prestress tensioning cannot achieve the design effect. And the anchoring mode has low efficiency, needs to be repeatedly added with anchors, consumes a large amount of manpower and time, and influences the construction progress. And this kind of novel stretch-draw anchor device can the efficient anchor nut 13, need not consider the space size and the anchor interval of reserving the anchor box, has great construction operation space, can be very convenient anchor nut 13. According to the force transmission principle, the operating rod penetrates into the corresponding jack of the lengthened sleeve during anchoring, and the torque can be conveniently transmitted to the nut 13 by rotating the operating rod, so that the anchoring quality is guaranteed, and the anchoring is convenient and fast.
In addition, compared with the conventional 10 multiplied by 10cm reserved anchor box, the device can remarkably reduce the size of the reserved anchor box. As the screw cap is anchored without too large construction operation space, the size of the reserved anchor box can be correspondingly reduced. A circular anchor box with a diameter of 8cm can be selected, which is a 50% reduction in cross-sectional area compared to the original anchor box. When the anchoring end seals the anchor, the combination area of the new concrete and the old concrete is correspondingly reduced, so that the probability of shrinkage and creep asynchronism of the new concrete and the old concrete at the combination surface is reduced. In addition, as the size of the anchor box is reduced, the number and the sectional area of the reinforcing steel bars required to be cut off during installation of the anchor box are correspondingly reduced. Through calculation, the cutting length of the steel bar is reduced by 20% under the condition of adopting the novel anchor box, and the cutting area of the steel bar is reduced by 25%. The two advantages reduce the damage degree to the structure and improve the safety of the structure.
Moreover, when the nut is anchored, because the jack and the prestressed reinforcement are still in a stretching state, if a wrench is adopted for anchoring, the nut is easy to be detached once carelessly operated, and the life safety of constructors is seriously threatened. The device can not touch tensioning devices such as jacks and the like, and the safety of constructors is guaranteed.
The utility model discloses a finish rolling twisted steel stretch-draw anchor 2:
as shown in fig. 4, the only difference between this embodiment 2 and the above embodiment 1 is that in this embodiment, the nut mounting head and the extension sleeve are of an integral structure, that is, both are integrally formed, and the integrally formed structure is defined as a nut mounting tube 201, at this time, a nut sleeve hole for sleeving the nut 13 to be anchored is opened at one end of the nut mounting tube 201, and a plug hole for plugging with the operating rod is arranged in the circumferential direction of the nut mounting tube.
In other embodiments, a slot may be formed in the nut mounting head, an insertion post may be formed on the lengthened sleeve, and the insertion post may be rectangular in shape as long as the insertion post and the lengthened sleeve are capable of being engaged with each other in a rotation-stopping manner after being inserted.
The above-described embodiments of the present invention do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (6)
1. The utility model provides a novel finish rolling twisted steel stretch-draw anchor which characterized in that includes:
the nut mounting head is provided with a nut sleeve hole matched with a nut to be anchored;
the lengthening sleeve is detachably connected with the nut mounting head and is in rotation stop fit with the nut mounting head; or the lengthening sleeve and the nut mounting head are integrally formed; at least two jacks which are uniformly distributed are arranged in the circumferential direction of the lengthened sleeve, and the axes of the jacks are vertical to the axis of the lengthened sleeve;
the steel bar connecting sleeve is coaxially arranged in the lengthened sleeve and is connected with the prestressed steel bar to be tensioned, and a force transmission steel bar is also coaxially connected in the steel bar connecting sleeve;
the operating rods are used for being inserted into the corresponding jacks;
and the jack is arranged on one side of the lengthened sleeve, which is far away from the nut mounting head, and clamps the force transmission steel bar.
2. A novel tension anchor device for finish rolled twisted steel according to claim 1, wherein the extension sleeve is connected with the nut mounting head by plugging.
3. A novel finish-rolled twisted steel bar tension anchor device according to claim 2, wherein one end of the extension sleeve is provided with a plurality of tooth grooves uniformly distributed along the circumferential direction thereof, and the corresponding end of the nut mounting head is circumferentially provided with gear shaping teeth corresponding to the tooth grooves one to one, and the gear shaping teeth are correspondingly fitted with the tooth grooves in an inserted manner.
4. The novel finish rolled threaded steel bar tensioning and anchoring device according to claim 3, wherein the nut mounting head comprises a large diameter section and a small diameter section which are coaxially arranged, the small diameter section is provided with the nut trepanning, and the large diameter section is provided with the gear shaping.
5. The novel finish rolled twisted steel bar tension anchor device according to any one of claims 1 to 4, wherein at least two rows of insertion holes are provided in the axial direction of the extension sleeve, each row of insertion holes including at least two of said insertion holes arranged uniformly in the circumferential direction of the extension sleeve.
6. A novel finish-rolled twisted steel tensioning and anchoring device according to any one of claims 1 to 4, wherein a top pressure plate fixedly connected with the force transmission steel bar is arranged on one side of the jack, which faces away from the extension sleeve, and the top pressure plate abuts against the surface of the jack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220580181.XU CN217353209U (en) | 2022-03-17 | 2022-03-17 | Novel fine rolling twisted steel stretch-draw anchor device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220580181.XU CN217353209U (en) | 2022-03-17 | 2022-03-17 | Novel fine rolling twisted steel stretch-draw anchor device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217353209U true CN217353209U (en) | 2022-09-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220580181.XU Active CN217353209U (en) | 2022-03-17 | 2022-03-17 | Novel fine rolling twisted steel stretch-draw anchor device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217353209U (en) |
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2022
- 2022-03-17 CN CN202220580181.XU patent/CN217353209U/en active Active
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