CN117486114B - Multi-hole front clamping jack - Google Patents
Multi-hole front clamping jack Download PDFInfo
- Publication number
- CN117486114B CN117486114B CN202410004780.0A CN202410004780A CN117486114B CN 117486114 B CN117486114 B CN 117486114B CN 202410004780 A CN202410004780 A CN 202410004780A CN 117486114 B CN117486114 B CN 117486114B
- Authority
- CN
- China
- Prior art keywords
- clamping
- anchor plate
- sliding
- plug
- ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 229910000831 Steel Inorganic materials 0.000 abstract description 88
- 239000010959 steel Substances 0.000 abstract description 88
- 238000000034 method Methods 0.000 abstract description 16
- 238000010276 construction Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 10
- 238000004804 winding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
- B66F3/25—Constructional features
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Clamps And Clips (AREA)
Abstract
The invention relates to the technical field of prestress construction, and particularly discloses a multi-hole front clamping jack, which comprises a sliding oil cylinder and a stretching plug, wherein the stretching plug is in sliding fit in the sliding oil cylinder, the stretching plug comprises a first sliding plug and a second sliding plug, one end of the first sliding plug is connected with a first anchor plate, a plurality of first clamping rings are arranged on the first anchor plate, each first clamping ring comprises at least three first arc plates, one end of the second sliding plug is connected with a second anchor plate, a plurality of second clamping rings are arranged on each second anchor plate, the second clamping rings have the same structure as the first clamping rings, each second clamping ring comprises at least three second arc plates, and clamping blocks are fixedly connected to the inner sides of the second arc plates; according to the invention, the positions of the steel strands can be doubly limited in the pre-tightening process of the steel strands through the first clamping ring and the second clamping ring, so that the loosening of the steel strands caused by the second clamping ring in the second pre-tightening and resetting process of the steel strands is avoided, and the working efficiency of pre-tightening the steel strands is effectively ensured.
Description
Technical Field
The invention relates to the technical field of prestress construction, in particular to a porous front clamping jack.
Background
Prestress tensioning is the most critical process for determining the overall durability of the bridge. The traditional intelligent tensioning pump station consists of a through jack and an intelligent control pump station, and the steel strand passes through the jack from the through sleeve during tensioning, and is fixed and then stretched and pre-tensioned.
In the patent document with the publication number of CN208648618U, a front clamping jack capable of being quickly installed is disclosed, and comprises an oil cylinder, a piston, a sealing plate, a supporting cylinder, an automatic tool anchor, a tool anchor plate, a top plate and a top plate sleeve, wherein an inner hole at the front end of the top plate sleeve is tooth-shaped, and a clamping groove is formed in the rear end of the tooth-shaped; the external diameter of the top plate is external teeth matched with the tooth shape of the inner hole at the front end of the top plate sleeve, and when the top plate moves to the clamping groove position along the tooth shape of the front end of the top plate sleeve, the top plate is rotated to enable the top plate to be limited in the clamping groove by the tooth-shaped end face of the top plate sleeve. When the jack is used, the steel strand is inserted into the tool clamping piece, the piston is driven to move through the oil cylinder, the piston is driven to clamp and fix the steel strand through the tool clamping piece when in pretension, the steel strand is pretensioned through the reciprocating movement of the piston, but the steel strand is clamped and tensioned through the tool clamping piece in the prestress tensioning process, and the surface of the steel strand is formed by winding a plurality of steel wires, so that the clamping piece is in line contact with the steel strand, friction between the steel strand and the tool clamping piece is reduced, the steel strand is easy to slide in the tool clamping piece, pretension efficiency of the steel strand is reduced, the clamping of the steel strand is relieved by the tool clamping piece in the resetting process, the steel strand is contracted, and pretension time of the steel strand is prolonged, so that the jack with the porous front clamping is provided to solve the problem.
Disclosure of Invention
The invention provides a multi-hole front clamping jack, which aims to solve the technical problems that in the prior art, as the surface of a steel strand is formed by winding a plurality of steel wires, the steel strand is in line contact with a clamping piece, so that the friction force between the steel strand and the clamping piece is reduced, the steel strand is easy to slide in the clamping piece, and the pre-tightening efficiency of the steel strand is reduced.
The porous front clamping jack of the invention comprises:
a sliding oil cylinder;
the tensile stopper, tensile stopper sliding fit is in the slip hydro-cylinder, tensile stopper includes:
the first sliding plug is fixedly connected with a first anchor plate at one end, a plurality of first clamping rings are arranged on the first anchor plate, each first clamping ring comprises at least three first arc plates, and the three first arc plates are matched with each other to form a cone;
the second slip stopper, first slip stopper sliding fit is in the inboard of second slip stopper, the one end fixedly connected with second anchor plate of second slip stopper, second anchor plate and first anchor plate homonymy set up, install a plurality of second snap rings on the second anchor plate, second snap ring is the same with first snap ring structure, the second snap ring includes at least three second circular arc board, the inboard fixedly connected with fixture block of second circular arc board.
Preferably, a plurality of mounting holes are formed in the second anchor plate and the first anchor plate, the mounting holes are conical holes, a slide way is formed in the inner wall of each mounting hole, and the outer side of the first arc plate is fixedly connected with a protruding block in sliding fit with the slide way.
Preferably, the slideway is a V-shaped groove, the protruding block is a V-shaped block, and the angle of the V-shaped block is smaller than the angle of the V-shaped groove.
Preferably, the diameter of the large-diameter end of the mounting hole is smaller than that of the large-diameter end of the first clamping ring.
Preferably, the three first circular arc plates are elastically connected.
Preferably, a plurality of first draw-in grooves and a plurality of second draw-in grooves have been seted up respectively to the both sides of first circular arc board, and is a plurality of the crisscross arrangement between second draw-in groove and the a plurality of first draw-in grooves, the inside fixedly connected with spring leaf of first draw-in groove, adjacent two have first bulge between the first draw-in groove, mutually support between first bulge and the second draw-in groove, adjacent two have the second bulge between the second draw-in groove, mutually support between second bulge and the first draw-in groove.
Preferably, the clamping block is provided with an inclined surface, and the thickness of the clamping block close to the large-diameter end of the second clamping ring is larger than that of the clamping block close to the small-diameter end of the second clamping ring.
Preferably, a side of the first anchor plate facing the second anchor plate is provided with a first toothed ring, and a side of the second anchor plate facing the first anchor plate is provided with a second toothed ring, and the second toothed ring is matched with the first toothed ring.
Preferably, the inner wall of the first circular arc plate or the second circular arc plate is provided with friction protrusions.
Preferably, the outer sides of the first sliding plug and the second sliding plug are fixedly connected with limiting rings, and the limiting rings slide in the sliding oil cylinder.
By adopting the technical scheme, the invention has the beneficial effects that:
1. the position of the steel strand can be doubly limited in the pretightening process of the steel strand through the first clamping ring and the second clamping ring, so that the second clamping ring is prevented from loosening the steel strand in the pretightening resetting process of the steel strand for the second time, and the pretightening working efficiency of the steel strand is effectively ensured.
2. After the second circular arc plate contacts with the steel strand, the clamping block can be extruded between two wire bodies of the steel strand, the contact area between the second circular arc plate and the steel strand is increased, the stability of connection between the second circular arc plate and the steel strand is guaranteed, the steel strand can be rotated when the clamping block is extruded between the two wire bodies of the steel strand, and the steel strand is limited and rotated through the first clamping ring.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic cross-sectional structure of the present invention.
Fig. 3 is a schematic view of a first view structure of the present invention.
Fig. 4 is a schematic view of the structure of the first anchor plate of the present invention.
Fig. 5 is a schematic view of the structure of a second anchor plate of the present invention.
Fig. 6 is a schematic structural view of a first snap ring of the present invention.
Fig. 7 is a schematic structural view of the circular arc plate of the present invention.
Fig. 8 is a schematic structural view of a second circular arc plate according to the present invention.
Reference numerals:
1. a sliding oil cylinder; 2. stretching the plug; 3. steel strand; 21. a first sliding plug; 22. a second sliding plug; 23. a first anchor plate; 24. a second anchor plate; 231. a first snap ring; 232. a first toothed ring; 241. a second snap ring; 242. a mounting hole; 243. a second toothed ring; 2311. a first circular arc plate; 2312. a protruding block; 2313. a first clamping groove; 2314. a second clamping groove; 2315. a spring piece; 2316. a first bulge; 2317. a second bulge; 2411. a second arc plate; 2412. a clamping block; 2421. and a slideway.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
Example 1
As shown in fig. 1 to 5, the multi-hole front clamping jack provided by the invention comprises a sliding oil cylinder 1, wherein a stretching plug 2 is in sliding fit with the sliding oil cylinder 1, a steel strand 3 is positioned on the stretching plug 2, the steel strand 3 is subjected to movement through the stretching plug 2 to realize the increase of pretightening force on the steel strand 3, the stretching plug 2 comprises a first sliding plug 21 and a second sliding plug 22, the outer sides of the first sliding plug 21 and the second sliding plug 22 are fixedly connected with limiting rings, the limiting rings slide in the sliding oil cylinder 1, the limiting rings can limit the first sliding plug 21 and the second sliding plug 22 in the sliding oil cylinder 1, meanwhile, hydraulic oil in the sliding oil cylinder 1 drives the limiting rings to drive the first sliding plug 21 and the second sliding plug 22 to move respectively, the first sliding plug 21 is in sliding fit with the inner side of the second sliding plug 22, one end fixedly connected with first anchor plate 23 of first slip stopper 21, the one end fixedly connected with second anchor plate 24 of second slip stopper 22, second anchor plate 24 and first anchor plate 23 homonymy set up, install a plurality of first snap rings 231 on the first anchor plate 23, install a plurality of second snap rings 241 on the second anchor plate 24, steel strand wires 3 are located first snap rings 231 and second snap rings 241, a plurality of first snap rings 231 and a plurality of second snap rings 241 correspond each other, in detail, a plurality of mounting holes 242 have all been seted up on second anchor plate 24 and the first anchor plate 23, the mounting hole 242 is the bell mouth, slide 2421 has been seted up on the inner wall of mounting hole 242, slide 2421 is the V type groove, first snap rings 231 and second snap rings 241 slide respectively in the mounting hole 242 on the first anchor plate 23 and in the mounting hole 242 on the second anchor plate 24. The first tooth ring 232 is arranged on the side, facing the second anchor plate 24, of the first anchor plate 23, the second tooth ring 243 is arranged on the side, facing the first anchor plate 23, of the second anchor plate 24, the second tooth ring 243 is matched with the first tooth ring 232, and therefore shearing of the steel strands 3 caused by relative rotation between the first anchor plate 23 and the second anchor plate 24 due to the fact that the first sliding plug 21 and the second sliding plug 22 are moved in the moving process can be avoided.
In this embodiment, the positions of the steel strands 3 can be doubly limited in the process of pre-tightening the steel strands 3 through the first clamping ring 231 and the second clamping ring 241, so that the second clamping ring 241 is prevented from loosening the steel strands 3 in the process of pre-tightening and resetting the steel strands 3 for the second time, and the working efficiency of pre-tightening the steel strands 3 is effectively ensured.
As shown in fig. 6 to 8, the first snap ring 231 includes at least three first circular arc plates 2311, the three first circular arc plates 2311 are matched with each other to form a cone shape, the diameter of the large diameter end of the mounting hole 242 is smaller than that of the large diameter end of the first snap ring 231, the first circular arc plates 2311 can be prevented from being separated from the mounting hole 242, elastic connection between the three first circular arc plates 2311 can ensure stability of positions between the three first circular arc plates 2311, the situation that the diameter of the steel strand 3 is smaller than that of the first snap ring 231 due to contact between the three first circular arc plates 2311, so that the first snap ring 231 or the second snap ring 241 cannot be penetrated is avoided, the outer side of the first circular arc plates 2311 is fixedly connected with a protruding block 2312 in sliding fit with the slide way 2421, the protruding block 2312 is a V-shaped block, the angle of V type piece is less than the angle of V type groove, thereby first ring gear 232 is in the pretension in centre gripping steel strand wires 3 in-process, thereby steel strand wires 3 can take place to rotate and make protruding piece 2312 drive first circular arc board 2311 and remove towards steel strand wires 3, further make first circular arc board 2311 extrude steel strand wires 3, increase steel strand wires 3 and steel strand wires 3's frictional force, first circular arc board 2311's inner wall has friction protrusion, second snap ring 241 is the same with first snap ring 231 structure, second snap ring 241 includes at least three second circular arc board 2411, the inboard fixedly connected with fixture block 2412 of second circular arc board 2411, in detail, fixture block 2412 has the inclined plane, the thickness that fixture block 2412 is close to second snap ring 241 big footpath end is greater than the thickness that fixture block 2412 is close to second snap ring 241 footpath end.
In this embodiment, the cooperation between the three first arc plates 2311 can enable the steel strand 3 to be clamped more and more tightly by the first clamping ring 231 in the pre-tightening process, so as to avoid the influence of slipping between the first clamping ring 231 and the steel strand 3 on the pre-tightening efficiency of the steel strand 3.
Wherein, after second circular arc board 2411 contacts with steel strand wires 3, fixture block 2412 can be extruded into between two line bodies of steel strand wires 3, increases the area of contact between second circular arc board 2411 and steel strand wires 3, guarantees the frictional force between second circular arc board 2411 and the steel strand wires 3, can make steel strand wires 3 rotate when fixture block 2412 extrudees between two line bodies of steel strand wires 3, restricts steel strand wires 3 through first snap ring 231, has solved steel strand wires 3 pivoted condition.
Example two
As shown in fig. 7 and 8, the difference between this and the first embodiment is that: a plurality of first clamping grooves 2313 and a plurality of second clamping grooves 2314 are respectively formed in two sides of the first arc plate 2311, the second clamping grooves 2314 and the first clamping grooves 2313 are arranged in a staggered mode, a spring piece 2315 is fixedly connected to the inside of each first clamping groove 2313, a first convex circle 2316 is arranged between two adjacent first clamping grooves 2313, the first convex circle 2316 and the second clamping grooves 2314 are matched with each other, a second convex circle 2317 is arranged between two adjacent second clamping grooves 2314, and the second convex circle 2317 and the first clamping grooves 2313 are matched with each other.
In this embodiment, setting between a plurality of first draw-in grooves 2313 and a plurality of second draw-in grooves 2314 can realize forming the grafting mode between three first circular arc boards 2311 or between three second circular arc boards 2411 to make first snap ring 231 or second snap ring 241 have bigger regulation space, be convenient for first snap ring 231 or second snap ring 241 be applicable to the steel strand 3 of different diameters, increased the variety of first snap ring 231 or second snap ring 241 use scene, solved the condition that needs to change different first snap rings 231 or second snap rings 241 to different steel strand 3.
The working principle of the invention is as follows:
firstly, the steel strand 3 sequentially passes through the second clamping ring 241 and the first toothed ring 232, at this time, the contact between the first anchor plate 23 and the second anchor plate 24 is shown in fig. 3, then, the first sliding plug 21 and the second sliding plug 22 synchronously move towards the front end of the sliding cylinder 1, in the moving process of the first sliding plug 21 and the second sliding plug 22, the first clamping ring 231 and the second clamping ring 241 move towards the mounting hole 242, and the three first arc plates 2311 or the three second arc plates 2411 are pressed towards the middle of the steel strand 3 under the extrusion action of the mounting hole 242, so that the steel strand 3 is pressed and clamped;
in the pre-tightening process of the steel strand 3, friction forces between the first clamping ring 231 and the second clamping ring 241 and the steel strand 3 are larger and larger, so that slipping caused by loosening of the steel strand 3 and the first clamping ring 231 and the second clamping ring 241 respectively is avoided, wherein a clamping block 2412 on a second circular arc plate 2411 can be extruded between two wire bodies in the steel strand 3 in the contact process of the second clamping ring 241 and the steel strand 3, so that the contact area between the second circular arc plate 2411 and the steel strand 3 is increased, the wire bodies in the steel strand 3 can be rotated in the gap process of inserting the clamping block 2412 between two adjacent wire bodies in the steel strand 3, and the rotation of the wire bodies in the steel strand 3 is avoided because the positions of the steel strand 3 are clamped by the three first circular arc plates 2311 at the same time;
finally, when the first sliding plug 21 and the second sliding plug 22 move to the rearmost end of the sliding cylinder 1, the second sliding plug 22 moves towards the front end of the sliding cylinder 1, at the moment, the second clamping ring 241 releases the pretensioning of the steel strand 3, the steel strand 3 cannot loosen because the first clamping ring 231 is in a pretensioning state on the steel strand 3, when the second sliding plug 22 moves to the foremost end of the sliding cylinder 1, the first sliding plug 21 moves towards the front end of the sliding cylinder 1, at the moment, the first clamping ring 231 releases the pretensioning of the steel strand 3, the elastic force shrinkage of the steel strand 3 moves towards the front end of the sliding cylinder 1, at the moment, the steel strand 3 is fixed again through the second clamping ring 241, and after the first anchor plate 23 on the first sliding plug 21 contacts with the second anchor plate 24 on the second sliding plug 22, the first sliding plug 21 and the second sliding plug 22 continue to synchronously move towards the rear end of the sliding cylinder 1, so that the pretensioning of the steel strand 3 is completed.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (10)
1. A multi-hole front truck jack, comprising:
a sliding cylinder (1);
stretching plug (2), stretching plug (2) sliding fit is in sliding cylinder (1), stretching plug (2) include:
the sliding device comprises a first sliding plug (21), wherein one end of the first sliding plug (21) is fixedly connected with a first anchor plate (23), a plurality of first clamping rings (231) are arranged on the first anchor plate (23), each first clamping ring (231) comprises at least three first arc plates (2311), and the three first arc plates (2311) are mutually matched to form a cone;
second slip stopper (22), first slip stopper (21) sliding fit is in the inboard of second slip stopper (22), the one end fixedly connected with second anchor plate (24) of second slip stopper (22), second anchor plate (24) and first anchor plate (23) homonymy set up, install a plurality of second snap rings (241) on second anchor plate (24), second snap ring (241) are the same with first snap ring (231) structure, second snap ring (241) include at least three second circular arc board (2411), the inboard fixedly connected with fixture block (2412) of second circular arc board (2411).
2. The multi-hole front-clamping jack according to claim 1, wherein a plurality of mounting holes (242) are formed in the second anchor plate (24) and the first anchor plate (23), the mounting holes (242) are conical holes, a slide way (2421) is formed in the inner wall of each mounting hole (242), and protruding blocks (2312) in sliding fit with the slide way (2421) are fixedly connected to the outer side of the first arc plate (2311).
3. The multi-hole front truck jack of claim 2, wherein the slide way (2421) is a V-shaped groove, the protruding block (2312) is a V-shaped block, and an angle of the V-shaped block is smaller than an angle of the V-shaped groove.
4. A multi-hole front truck jack according to claim 3, characterized in that the diameter of the large diameter end of the mounting hole (242) is smaller than the diameter of the large diameter end of the first snap ring (231).
5. The multi-hole front truck jack of claim 1, wherein three of the first circular arc plates (2311) are elastically connected.
6. The multi-hole front jack according to claim 5, wherein a plurality of first clamping grooves (2313) and a plurality of second clamping grooves (2314) are respectively formed in two sides of the first arc plate (2311), the second clamping grooves (2314) and the first clamping grooves (2313) are arranged in a staggered mode, a spring piece (2315) is fixedly connected to the inside of each first clamping groove (2313), a first bulge (2316) is formed between every two adjacent first clamping grooves (2313), each first bulge (2316) is matched with each second clamping groove (2314), a second bulge (2317) is formed between every two adjacent second clamping grooves (2314), and each second bulge (2317) is matched with each first clamping groove (2313).
7. The multi-hole front clamping jack according to claim 1, wherein the clamping block (2412) has an inclined surface, and the thickness of the clamping block (2412) near the large diameter end of the second clamping ring (241) is greater than the thickness of the clamping block (2412) near the small diameter end of the second clamping ring (241).
8. The multi-hole front truck jack of claim 1, wherein the side of the first anchor plate (23) facing the second anchor plate (24) has a first toothed ring (232), the side of the second anchor plate (24) facing the first anchor plate (23) has a second toothed ring (243), and the second toothed ring (243) cooperates with the first toothed ring (232).
9. The multi-hole front truck jack of claim 1, wherein an inner wall of the first arc plate (2311) or the second arc plate (2411) has friction protrusions.
10. The multi-hole front clamping jack according to claim 1, wherein the outer sides of the first sliding plug (21) and the second sliding plug (22) are fixedly connected with limiting rings, and the limiting rings slide in the sliding cylinder (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410004780.0A CN117486114B (en) | 2024-01-03 | 2024-01-03 | Multi-hole front clamping jack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410004780.0A CN117486114B (en) | 2024-01-03 | 2024-01-03 | Multi-hole front clamping jack |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117486114A CN117486114A (en) | 2024-02-02 |
| CN117486114B true CN117486114B (en) | 2024-03-05 |
Family
ID=89669485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410004780.0A Active CN117486114B (en) | 2024-01-03 | 2024-01-03 | Multi-hole front clamping jack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117486114B (en) |
Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1527601A (en) * | 1974-12-10 | 1978-10-04 | Buildinter Ag | Jack for stressing and anchoring tendons |
| JPH02153167A (en) * | 1988-12-01 | 1990-06-12 | Masayoshi Fukai | Built-up pc twist steel wire tenser, tension work thereof, retension work thereof, and jack chair |
| EP0544573A1 (en) * | 1991-11-26 | 1993-06-02 | FREYSSINET INTERNATIONAL et COMPAGNIE | Device for preventing slack in prestressing strands |
| KR100761249B1 (en) * | 2006-04-05 | 2007-09-27 | 홍익산업 주식회사 | Apparatus and method for pre-tensioning of anchor for marine structure |
| KR20110137483A (en) * | 2010-06-17 | 2011-12-23 | 주식회사 삼우기초기술 | Apparatus for fixing the permanent ground anchor |
| CN202625726U (en) * | 2012-05-16 | 2012-12-26 | 李金岭 | Large-tonnage jacking-pressing type front-clamping jack |
| CN102953549A (en) * | 2011-08-30 | 2013-03-06 | 中铁十局集团有限公司 | Novel quick tensioning construction method for front-blocked jack |
| CN104045018A (en) * | 2014-05-30 | 2014-09-17 | 柳州泰姆预应力机械有限公司 | Front-clamping type jack |
| CN104649180A (en) * | 2014-06-24 | 2015-05-27 | 柳州市威尔姆预应力有限公司 | Internal clamping type tension jack and construction method thereof |
| CN106285013A (en) * | 2016-10-18 | 2017-01-04 | 柳州黔桥工程材料有限公司 | Steel strand wires group's anchor monoblock type automatic synchronization control method |
| CN206828967U (en) * | 2017-03-30 | 2018-01-02 | 中铁六局集团有限公司 | The longitudinal prestressing tensioning equipment of railway engineering continuous beam |
| CN108716284A (en) * | 2018-06-08 | 2018-10-30 | 贵州中建建筑科研设计院有限公司 | Anti-rebound steel strand wires strainer |
| JP2019104565A (en) * | 2017-12-11 | 2019-06-27 | 株式会社横河ブリッジ | Fixing method of heavy load and device thereof |
| CN113373820A (en) * | 2021-07-07 | 2021-09-10 | 浙江工业职业技术学院 | Bridge prestress tension construction method |
| CN113501459A (en) * | 2021-05-27 | 2021-10-15 | 中铁十九局集团第三工程有限公司 | Front-clamping porous through jack structure |
| CN115450436A (en) * | 2022-10-10 | 2022-12-09 | 江苏凯恩特机械设备制造有限公司 | Multi-line active anchoring equal-force tensioning hydraulic jack for prestressed concrete construction |
-
2024
- 2024-01-03 CN CN202410004780.0A patent/CN117486114B/en active Active
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1527601A (en) * | 1974-12-10 | 1978-10-04 | Buildinter Ag | Jack for stressing and anchoring tendons |
| JPH02153167A (en) * | 1988-12-01 | 1990-06-12 | Masayoshi Fukai | Built-up pc twist steel wire tenser, tension work thereof, retension work thereof, and jack chair |
| EP0544573A1 (en) * | 1991-11-26 | 1993-06-02 | FREYSSINET INTERNATIONAL et COMPAGNIE | Device for preventing slack in prestressing strands |
| KR100761249B1 (en) * | 2006-04-05 | 2007-09-27 | 홍익산업 주식회사 | Apparatus and method for pre-tensioning of anchor for marine structure |
| KR20110137483A (en) * | 2010-06-17 | 2011-12-23 | 주식회사 삼우기초기술 | Apparatus for fixing the permanent ground anchor |
| CN102953549A (en) * | 2011-08-30 | 2013-03-06 | 中铁十局集团有限公司 | Novel quick tensioning construction method for front-blocked jack |
| CN202625726U (en) * | 2012-05-16 | 2012-12-26 | 李金岭 | Large-tonnage jacking-pressing type front-clamping jack |
| CN104045018A (en) * | 2014-05-30 | 2014-09-17 | 柳州泰姆预应力机械有限公司 | Front-clamping type jack |
| CN104649180A (en) * | 2014-06-24 | 2015-05-27 | 柳州市威尔姆预应力有限公司 | Internal clamping type tension jack and construction method thereof |
| CN106285013A (en) * | 2016-10-18 | 2017-01-04 | 柳州黔桥工程材料有限公司 | Steel strand wires group's anchor monoblock type automatic synchronization control method |
| CN206828967U (en) * | 2017-03-30 | 2018-01-02 | 中铁六局集团有限公司 | The longitudinal prestressing tensioning equipment of railway engineering continuous beam |
| JP2019104565A (en) * | 2017-12-11 | 2019-06-27 | 株式会社横河ブリッジ | Fixing method of heavy load and device thereof |
| CN108716284A (en) * | 2018-06-08 | 2018-10-30 | 贵州中建建筑科研设计院有限公司 | Anti-rebound steel strand wires strainer |
| CN113501459A (en) * | 2021-05-27 | 2021-10-15 | 中铁十九局集团第三工程有限公司 | Front-clamping porous through jack structure |
| CN113373820A (en) * | 2021-07-07 | 2021-09-10 | 浙江工业职业技术学院 | Bridge prestress tension construction method |
| CN115450436A (en) * | 2022-10-10 | 2022-12-09 | 江苏凯恩特机械设备制造有限公司 | Multi-line active anchoring equal-force tensioning hydraulic jack for prestressed concrete construction |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117486114A (en) | 2024-02-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN211740871U (en) | Clamping device for metal material tensile test | |
| CN1108331A (en) | A rock anchor assembly | |
| CN117486114B (en) | Multi-hole front clamping jack | |
| CA2512277A1 (en) | Termination device for an aramid-based elevator rope | |
| CN1797883A (en) | Clamp for long component | |
| CN112726584A (en) | Connecting structure for prefabricated part, prefabricated part and prefabricated pile combination | |
| CN110185270A (en) | A kind of limit plate reducing prestressing force retraction loss | |
| CN1271343C (en) | Facilitated tightening device | |
| CN114227746A (en) | Asymmetric clamping jaw mechanism | |
| CN1680658A (en) | Cord end cover | |
| JP7511903B2 (en) | Snap ring assembly device | |
| EP2020399A1 (en) | Compact fixing element for elevator ropes | |
| CN109505553B (en) | Using method of coiled tubing four-ram blowout preventer suspension diameter shrinkage automatic compensation device | |
| CN215482339U (en) | Hydraulic clamping device for adjusting tension degree of steel strand | |
| CN214472407U (en) | Cable compressive strength detection device | |
| CN212376143U (en) | Finish rolling deformed steel bar clamping piece | |
| CN201514355U (en) | Anti-rotation device used in steel stranded wire fatigue test | |
| CN210177812U (en) | Elastic combined nut follow-up anchoring deviation rod piece connector | |
| CN210316561U (en) | Bare concrete template plug | |
| CN112411536B (en) | Detachable and assembled type recovery anchor cable | |
| CN108425463B (en) | Clamping piece type flat low-retraction anchor and tensioning method for short-bundle prestressed tendons by using same | |
| CN110778027A (en) | Finish rolling deformed steel bar clamping piece | |
| CN209977002U (en) | Self-adjusting double-end connecting piece | |
| CN112983294A (en) | Butt joint device, drill rod and pile machine | |
| CN2825586Y (en) | Inner-clamping type single-hole top-pressing jack |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |