CN212296441U - Adopt jack stretch-draw shell type prestressing force cavity stock auxiliary device that rises - Google Patents
Adopt jack stretch-draw shell type prestressing force cavity stock auxiliary device that rises Download PDFInfo
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- CN212296441U CN212296441U CN202020357966.1U CN202020357966U CN212296441U CN 212296441 U CN212296441 U CN 212296441U CN 202020357966 U CN202020357966 U CN 202020357966U CN 212296441 U CN212296441 U CN 212296441U
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- anchor rod
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Abstract
The utility model relates to an adopt jack stretch-draw shell formula prestressing force cavity stock auxiliary device that rises belongs to engineering construction technical field, adopt jack stretch-draw shell formula prestressing force cavity stock auxiliary device that rises to include stretch-draw auxiliary stand, backing plate, add long stock, lock nut, connecting sleeve, jack, tip backing plate, tip nut, stretch-draw auxiliary stand cover is established on the stock in the backing plate outside, install the jack on the outer end, the stock exposes the tip and installs extension stock through connecting sleeve, the extension stock outer end passes the centre bore of connecting plate in proper order, the jack hole stretches out the outside, the extension stock exposes the end cover and establishes the tip backing plate, the tip backing plate adopts tip nut locking. The utility model discloses a backing plate, stretch-draw auxiliary device and jack combine to realize drawing of stock for the operation is more convenient stable, simultaneously, through setting up extension stock and connecting sleeve, makes the stock need not to reserve excessive length that exposes, saves raw and other materials.
Description
Technical Field
The utility model relates to an engineering construction technical field, concretely relates to adopt jack stretch-draw shell formula prestressing force cavity stock auxiliary device that rises.
Background
The expanding type prestressed hollow anchor rod is a type lower than a stress anchor rod and is applied to supporting engineering of anchoring stratum of hard rock and medium hard rock and underground engineering of high-stress rock stratum which is easy to generate rock burst. The active support resistance can be provided immediately after excavation, the bearing capacity of a single anchor is less than or equal to 200KN, and the length of the anchor rod can reach 20m or more. After the rod body and the anchor head are inserted into the drill hole and the anchor head is expanded at the bottom of the drill hole and is clamped with the hole wall, an orifice base plate, grouting and an exhaust pipe are installed, after the preparation work is finished, a tensioning procedure is carried out, and tensioning of the expansion shell type prestressed hollow anchor rod is a key link for ensuring that the prestress of the expansion shell type prestressed hollow anchor rod meets the design requirement. The common tensioning method comprises a torque wrench tensioning method and a jack tensioning method, but the tensioning method is most commonly applied by a torque wrench, and engineering practice proves that the shell-expanding prestressed hollow anchor rod with the tensioning prestress below 50KN can meet the design requirement by tensioning the torque wrench, but the design requirement of manually rotating the torque wrench to tension the hollow anchor rod with the tensioning prestress above 50KN is difficult to meet the design requirement. The reason of the method is not difficult to find by analyzing, the bolt is tensioned by rotating the locking nut outside the hollow bolt through the wrench when the torque wrench is used for tensioning, along with the gradual increase of the tensioning prestress, the compressive stress between the locking nut and the orifice base plate is increased, the friction force between the cross section of the locking nut and the surface of the base plate is increased when the locking nut is further rotated, the locking nut stops screwing when the torque manually applied to the torque wrench cannot overcome the friction force, and the tensioning prestress cannot be further improved.
The jack is adopted to stretch the expanding shell type prestressed hollow anchor rod, and the applied tension force of the jack is consistent with the direction of the central axis of the expanding shell type prestressed hollow anchor rod, so that the anchor rod body is more easily extended in the stretching process, and the jacks of different models can be selected according to the designed prestress value to stretch. However, when the jack is used for tensioning the shell-expanding type prestressed hollow anchor rod, a longer exposed length needs to be reserved for normal tensioning, so that raw materials are wasted.
Disclosure of Invention
To the problem that exists among the background art, the utility model provides an adopt jack stretch-draw shell formula prestressing force cavity stock auxiliary device that rises adopts backing plate, stretch-draw auxiliary device and jack to combine to realize drawing of stock for the operation is more stable convenient, simultaneously, through setting up extension stock and connecting sleeve, makes the stock need not to reserve excessive length that exposes, saves raw and other materials.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the jack tensioning shell type prestress hollow anchor rod auxiliary device comprises a tensioning auxiliary support 1, a backing plate 2, a lengthened anchor rod 3, a locking nut 4, a connecting sleeve 5, a jack 6, an end backing plate 8 and an end nut 9, the tensioning auxiliary support 1 comprises two connecting plates 10, a central hole 12 is formed in each connecting plate 10, the connecting plates 10 are connected through a supporting leg plate 11, a base plate 2 is sleeved on the exposed end of an anchor rod and locked through a locking nut 4, the tensioning auxiliary support 1 is sleeved on the anchor rod on the outer side of the base plate 2, the inner end of the tensioning auxiliary support is attached to the base plate 2, a jack 6 is installed on the outer end of the tensioning auxiliary support, an extended anchor rod 3 is installed on the exposed end of the anchor rod through a connecting sleeve 5, the outer end of the extended anchor rod 3 sequentially penetrates through the central hole 12 of the connecting plate 10, the inner hole of the jack 6 extends out of the outer side, an end.
Preferably, the connecting plates 10 are circular plates, and the leg plates 11 are provided in three numbers, and are uniformly arranged in the circumferential direction of the central hole 12 at the two connecting plates 10.
Preferably, the central bore 12 is more than 3mm larger than the periphery of the locking nut 4 and the connecting sleeve 5.
The utility model has the advantages that:
the utility model discloses a backing plate, stretch-draw auxiliary device and jack combine to realize drawing of stock for the operation is more convenient stable, simultaneously, through setting up extension stock and connecting sleeve, makes the stock need not to reserve excessive length that exposes, saves raw and other materials.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic structural view of the auxiliary tension bracket of the present invention;
FIG. 3 is a top view of FIG. 2;
the device comprises a tension auxiliary support 1, a backing plate 2, a lengthened anchor rod 3, a locking nut 4, a connecting sleeve 5, a jack 6, a hydraulic oil pipe 7, an end backing plate 8, an end nut 9, a connecting plate 10, a leg plate 11 and a central hole 12.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the following will explain in detail a preferred embodiment of the present invention with reference to the accompanying drawings to facilitate understanding of the skilled person.
As shown in fig. 1 to 3, the jack-tensioning expansion-shell type prestressed hollow anchor rod auxiliary device comprises an auxiliary tensioning support 1, a backing plate 2, an elongated anchor rod 3, a locking nut 4, a connecting sleeve 5, a jack 6, an end backing plate 8 and an end nut 9, wherein the auxiliary tensioning support 1 comprises two connecting plates 10, the connecting plates 10 are provided with central holes 12, the connecting plates 10 are connected through leg plates 11, the backing plate 2 is sleeved on the exposed end of the anchor rod and locked by the locking nut 4, the auxiliary tensioning support 1 is sleeved on the anchor rod outside the backing plate 2, the inner end is attached to the backing plate 2, the outer end is provided with the jack 6, the exposed end of the anchor rod is provided with the elongated anchor rod 3 through the connecting sleeve 5, the outer end of the elongated anchor rod 3 sequentially penetrates through the central hole 12 of the connecting plate 10, the inner hole of the jack 6 extends out of the, the end shim plate 8 is locked with an end nut 9.
The connecting plates 10 are circular plates, the number of the leg plates 11 is three, the two connecting plates 10 are uniformly arranged along the circumferential direction of the central hole 12, the included angle is 120 degrees, and the gap between the leg plates 11 at least enables a wrench to pass through and adjust the locking nut 4 inside.
The central hole 12 has an aperture which is larger than the outer peripheries of the locking nut 4 and the connecting sleeve 5 by more than 3mm, ensuring that both the locking nut 4 and the connecting sleeve 5 can pass through the central hole 12 for easy installation and adjustment.
As shown in fig. 1, when the anchor rod expanding type prestress hollow anchor rod is tensioned, firstly, the exposed end of the anchor rod is sleeved with a backing plate 2 and locked by a locking nut 4, the inner side of the backing plate 2 is attached to an anchor rod hole orifice, then, an elongated anchor rod 3 is installed at the exposed end part of the anchor rod through a connecting sleeve 5, secondly, a tensioning auxiliary support 1 is sleeved on the anchor rod at the rear side of the backing plate 2, the front end of the tensioning auxiliary support 1 is attached to the backing plate 2, a jack 6 is installed at the outer end of the tensioning auxiliary support 1, the outer end of the elongated anchor rod 3 sequentially penetrates through a center hole 12 of a connecting plate 10, the inner hole of the jack 6 extends out of the outer side, an end part backing plate 8 is sleeved on. And in the tensioning process, an oil pump is started to supply oil to a jack 6 through a hydraulic oil pipe 7, the expansion shell type prestressed hollow anchor rod starts to be tensioned, and meanwhile, a locking nut 4 is fastened in a gap between the two leg plates 3 manually through a wrench in time until the tensioning force meets the design requirement. And (3) closing an oil pump of the jack 6 after tensioning meets the requirement, and then sequentially detaching the end nut 9, the end base plate 8, the jack 6, the tensioning auxiliary support 1, the connecting sleeve 5 and the lengthened anchor rod 3.
Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (3)
1. The utility model provides an adopt jack stretch-draw shell type prestressing force cavity stock auxiliary device which characterized in that: the tensioning auxiliary support comprises a tensioning auxiliary support (1), a backing plate (2), an elongated anchor rod (3), a locking nut (4), a connecting sleeve (5), a jack (6), an end backing plate (8) and an end nut (9), wherein the tensioning auxiliary support (1) comprises two connecting plates (10), a central hole (12) is formed in each connecting plate (10), the connecting plates (10) are connected through a leg plate (11), the backing plate (2) is sleeved on the exposed end of the anchor rod and locked through the locking nut (4), the tensioning auxiliary support (1) is sleeved on the anchor rod on the outer side of the backing plate (2), the inner end of the tensioning auxiliary support is attached to the backing plate (2), the jack (6) is installed on the outer end of the tensioning auxiliary support, the elongated anchor rod (3) is installed on the exposed end portion of the anchor rod through the connecting sleeve (5), the outer end of the elongated anchor rod (3), an end part backing plate (8) is sleeved on the exposed end of the lengthened anchor rod (3), and the end part backing plate (8) is locked by an end part nut (9).
2. The jack-tensioned expanding shell type prestressed hollow anchor rod auxiliary device as claimed in claim 1, wherein: the connecting plates (10) are circular plates, the number of the supporting leg plates (11) is three, and the two connecting plates (10) are uniformly arranged along the circumferential direction of the central hole (12).
3. The jack-tensioned expanding shell type prestressed hollow anchor rod auxiliary device as claimed in claim 1, wherein: the aperture of the central hole (12) is larger than the peripheries of the locking nut (4) and the connecting sleeve (5) by more than 3 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020357966.1U CN212296441U (en) | 2020-03-20 | 2020-03-20 | Adopt jack stretch-draw shell type prestressing force cavity stock auxiliary device that rises |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020357966.1U CN212296441U (en) | 2020-03-20 | 2020-03-20 | Adopt jack stretch-draw shell type prestressing force cavity stock auxiliary device that rises |
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| Publication Number | Publication Date |
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| CN212296441U true CN212296441U (en) | 2021-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020357966.1U Active CN212296441U (en) | 2020-03-20 | 2020-03-20 | Adopt jack stretch-draw shell type prestressing force cavity stock auxiliary device that rises |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114875907A (en) * | 2022-05-24 | 2022-08-09 | 中国葛洲坝集团第三工程有限公司 | Anchoring device for unfavorable geological section and construction method thereof |
-
2020
- 2020-03-20 CN CN202020357966.1U patent/CN212296441U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114875907A (en) * | 2022-05-24 | 2022-08-09 | 中国葛洲坝集团第三工程有限公司 | Anchoring device for unfavorable geological section and construction method thereof |
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