CN103387191A - Portable pre-stressed tensioning jack - Google Patents
Portable pre-stressed tensioning jack Download PDFInfo
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- CN103387191A CN103387191A CN2013103580894A CN201310358089A CN103387191A CN 103387191 A CN103387191 A CN 103387191A CN 2013103580894 A CN2013103580894 A CN 2013103580894A CN 201310358089 A CN201310358089 A CN 201310358089A CN 103387191 A CN103387191 A CN 103387191A
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Abstract
The invention discloses a portable pre-stressed tensioning jack, which relates to the technical field of pre-stressed tensioning construction. The portable pre-stressed tensioning jack comprises a run-through sleeve which is connected to a pedestal, wherein tool clamping pieces are clamped in the run-through sleeve; the small ends of the tool clamping pieces are close to the other end of the run-through sleeve; a spring for pressing the tool clamping pieces is arranged in the run-through sleeve and is butted against a pressing nut connected to the pedestal; the pedestal is connected with a fixing nut through a plurality of connecting rods; the fixing nut is in threaded connection with a run-through screw; an ejection sleeve which faces the tool clamping pieces is embedded in one end of the run-through screw; the other end of the run-through screw is connected with a supporting barrel; a movable ejection head which extends out of the barrel is inserted in the supporting barrel; a bearing is arranged between the side wall of the movable ejection head and the inner wall of the supporting barrel; and the movable ejection head and the supporting barrel are provided with through holes for allowing a pre-stressed steel strand to penetrate. Compared with the prior art, the portable pre-stressed tensioning jack has the advantages of simple structure, convenience in carrying, and safety, easiness and convenience in use and is suitable for the field of tensioning of small-tonnage steel strands, and no industrial energy is consumed during tensioning construction.
Description
Technical field
The present invention relates to the tensioning construction technical field, especially a kind of prestressed stretch-draw jack.
Background technology
the jack that uses in the tensioning construction technical field is all the dedicated hydraulic jack that must coordinate oil pump to use, the dedicated hydraulic jack of existing a kind of prestressed stretch-draw includes oil cylinder, hollow piston, punching cover and moveable anchor, the punching cover is connected to an end of oil cylinder, hollow piston is located between oil cylinder and punching cover and is protruding from the other end of oil cylinder, the moveable anchor that is installed on the piston external part comprises the instrument anchor slab and is placed in the interior tool clamping piece of instrument anchor slab taper hole, when carrying out the prestressing tendon stretching construction, when oil pump to fuel feeding in oil cylinder, piston produces relative motion with oil cylinder under the pressure-acting of fluid, prestressing tendon is moved with piston and extend under the clamping action of instrument cat.The jack of this structure has the following disadvantages: 1, the bodily form is huge, heavy, is not easy to transportation, needs many people to transport and install jack and oil pump, wastes time and energy; While 2, making, need be with a large amount of steel aspect material, processed complex, operation is loaded down with trivial details; 3, need in use the support of hydraulic oil, electric power, not only will consume the energy, and in the phenomenon of stretching construction place unrest pull the wire, be seen everywhere, have larger potential safety hazard; 4, waste one's talent on a petty job very much in the prestressed stretch-draw of little tonnage, be unfavorable for environmental protection.
Summary of the invention
The purpose of this invention is to provide a kind of portable prestressed stretch-draw jack, this jack can solve in prior art the jack that is used for little tonnage tensioning construction exists carry inconvenience and need to consume the industrial energy problem.
In order to address the above problem, the technical solution used in the present invention is: this portable prestressed stretch-draw jack comprises punching cover, tool clamping piece, one end of described punching cover is connected on a base, described tool clamping piece is arranged in the inner chamber of described punching cover, the small end of described tool clamping piece is near the other end of described punching cover, the inner chamber of described punching cover is equipped with top and presses the spring of described tool clamping piece, and described spring presses nut to connect with the top that is connected on described base; Be fixed with many pipe links on described base, at the other end of described many pipe links, be provided with captive nut, described punching is overlapped between described captive nut and described base; The described captive nut core through screw rod that has been threaded, one end of described core through screw rod is embedded with the top cover towards described tool clamping piece, the other end of described core through screw rod links a support tube, be fitted with the activity top of relatively described core through screw rod axial rotation in the cylindrical shell of described support tube, stretch out outside the cylindrical shell of described support tube described movable top, between the sidewall of described movable top and the inwall of described support tube, bearing is installed, described movable top and described support tube offer the through hole that wears prestress wire.
In above-mentioned portable prestressed stretch-draw jack technical scheme, technical scheme can also be more specifically: offer handle socket on the outer wall of described support tube.
Further, described bearing comprises the bearing that carries axial load and the bearing that carries radial weight.
Further, the bearing of described carrying axial load is thrust ball bearing; The bearing of described carrying radial weight is deep groove ball bearing.
Owing to having adopted technique scheme, the present invention compared with prior art has following beneficial effect:
1, simple and reasonable for structure, save steel, processing is simple, and the bodily form is little, and quality is light, is easy to carry.
2, be applicable to little tonnage steel strand tension field, tension tonnage can reach 20 tons, by M/C, can realize prestressed stretch-draw, uses safely, easy, need not to expend industrial energy, not only is conducive to environmental protection, and has greatly reduced construction cost.
3, can be by single carrying, installation, operation, time saving and energy saving.
Description of drawings
Fig. 1 is the front view of this portable prestressed stretch-draw jack.
Fig. 2 is the inner structure schematic diagram of this portable prestressed stretch-draw jack.
Fig. 3 is the exploded drawings of the rotating part of this portable prestressed stretch-draw jack.
The specific embodiment
The invention will be further described below in conjunction with accompanying drawing embodiment:
portable prestressed stretch-draw jack illustrated in figures 1 and 2 mainly comprises fixed part and rotating part, fixed part comprises base 11 and captive nut 4, be connected and fixed by many pipe links 6 between base 11 and captive nut 4, the middle part of base 11 is equipped with punching cover 8, this punching cover 8 is arranged between base 11 and captive nut 4, the inner chamber of punching cover 8 has one section to be taper hole, the small end of taper hole is away from base 11, be arranged with tool clamping piece 7 in taper hole, tool clamping piece 7 can be changed according to the steel strand specification of building site different model, the inner chamber of punching cover 8 is equipped with the spring 9 of the large end end face of screwing tool intermediate plate 7, spring 9 presses nut 10 to connect with the top that is threadedly connected on base 11, rotating part comprises core through screw rod 3, support tube 3-1, movable top 1, bearing and top cover 5, core through screw rod 3 is connected with the negative thread of captive nut 4 by the outside thread on its bar wall, one end of core through screw rod 3 is embedded with the top cover 5 of pushing up loose tool clamping piece 7 that is used for towards 8 settings of punching cover, the other end of core through screw rod 3 links a support tube 3-1, be fitted with the activity top 1 of around core through screw rod 3 axis, rotating in the cylindrical shell of this support tube 3-1, stretch out outside the cylindrical shell of support tube 3-1 movable top 1, between the sidewall of movable top 1 and the inwall of support tube 3-1, bearing is installed, the sidewall of movable top 1 and the inwall of support tube 3-1 are respectively arranged with for spacing and bearings mounted limited step, for guaranteeing that this jack can adapt to various operating modes well, bearing is except the bearing of Ying Youneng carrying axial load, also Ying Youneng carries the bearing of radial weight, preferably, the bearing of the carrying axial load that the present embodiment is selected is thrust ball bearing 2-1, the bearing of carrying radial weight is deep groove ball bearing 2-2, referring to Fig. 3, movable top 1 and support tube 3-1 offer the through hole that wears prestress wire, the axially consistent of nut 10 pressed on inner chamber, tool clamping piece 7 axial bore and the top of movable top 1 through hole, support tube 3-1 through hole, core through screw rod 3 axis holes, top cover 5 trepannings, punching cover 8, so that wear and the stretch-draw prestressing force steel strand, core through screw rod 3 and support tube 3-1 are the integral type structure, offer handle socket 3-2 on the outer wall of support tube 3-1,, by pulling the handle that inserts in handle socket 3-2, can easily rotate core through screw rod.
Portable prestressed stretch-draw jack of the present invention is mainly used in road slope stretch-draw, wall stretch-draw field, hole, hole, ore deposit, is applicable to the steel strand of 15mm ~ 19mm, and tension tonnage is at 15 tons ~ 20 tons, quality is only 15 kilograms, easy to carry, easy to use, can be by single carrying, installation, operation.While carrying out pre-stress construction, the steel strand wire harness is carried out stretch-draw by root.before single tendon stretch, handle is inserted in the handle socket 3-2 of support sleeve 3-1, pull handle and overlap 3-1 with rotary support, making core through screw rod 3 drive top cover 5 moves towards punching cover 8, until top cover 5 is loose to pass smoothly the steel strand wire harness with tool clamping piece 7 tops in punching cover 8, the stretch-draw that installs the steel strand of work ground tackle is reserved steel strand from penetrating the through hole at the bottom of support tube 3-1 cylinder in the through hole of the activity top 1 of this jack, and pass successively core through screw rod 3, top cover 5, punching cover 8, tool clamping piece 7, spring 9 and top and press nut 10, during stretch-draw, make the end face of the external part of movable top 1 push up mutually pressure with the work anchor slab, pulling handle rotates by support sleeve 3-1, making core through screw rod 3 drive top cover 5 moves towards the direction that deviates from punching cover 8, when top cover 5 breaks away from tool clamping piece 7, tool clamping piece 7 return under the effect of spring 9 clamps the steel strand wire harness, continue rotational support cover 3-1, the relativity of core through screw rod 3 and captive nut 4, the fixed part of jack is moved backward, realize simultaneously the stretch-draw to the steel strand wire harness under the clamping action of tool clamping piece 7, after meeting the requirements of elongation and tensile load, stretch-draw work is completed, the steel strand wire harness of the completing stretch-draw ground tackle of being worked clamps, backward rotation support tube 3-1 subsequently, make the top cover 5 loose tool clamping pieces 7 in top, tool clamping piece 7 opens and loosens steel strand, thereby can unload jack, for the stretch-draw work of next root steel strand wire harness is prepared.
Claims (4)
1. portable prestressed stretch-draw jack, comprise punching cover, tool clamping piece, it is characterized in that: an end of described punching cover is connected on a base, described tool clamping piece is arranged in the inner chamber of described punching cover, the small end of described tool clamping piece is near the other end of described punching cover, the inner chamber of described punching cover is equipped with top and presses the spring of described tool clamping piece, and described spring presses nut to connect with the top that is connected on described base; Be fixed with many pipe links on described base, at the other end of described many pipe links, be provided with captive nut, described punching is overlapped between described captive nut and described base; The described captive nut core through screw rod that has been threaded, one end of described core through screw rod is embedded with the top cover towards described tool clamping piece, the other end of described core through screw rod links a support tube, be fitted with the activity top of relatively described core through screw rod axial rotation in the cylindrical shell of described support tube, stretch out outside the cylindrical shell of described support tube described movable top, between the sidewall of described movable top and the inwall of described support tube, bearing is installed, described movable top and described support tube offer the through hole that wears prestress wire.
2. portable prestressed stretch-draw jack according to claim 1, is characterized in that: offer handle socket on the outer wall of described support tube.
3. portable prestressed stretch-draw jack according to claim 1 is characterized in that: described bearing comprises the bearing that carries axial load and the bearing of carrying radial weight.
4. portable prestressed stretch-draw jack according to claim 3, it is characterized in that: the bearing of described carrying axial load is thrust ball bearing; The bearing of described carrying radial weight is deep groove ball bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103580894A CN103387191A (en) | 2013-08-16 | 2013-08-16 | Portable pre-stressed tensioning jack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103580894A CN103387191A (en) | 2013-08-16 | 2013-08-16 | Portable pre-stressed tensioning jack |
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| Publication Number | Publication Date |
|---|---|
| CN103387191A true CN103387191A (en) | 2013-11-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013103580894A Pending CN103387191A (en) | 2013-08-16 | 2013-08-16 | Portable pre-stressed tensioning jack |
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| CN (1) | CN103387191A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108584753A (en) * | 2018-03-28 | 2018-09-28 | 哈尔滨工程大学 | Oscillating oil cylinder formula steel strand wires clamping device |
| CN112458899A (en) * | 2020-04-03 | 2021-03-09 | 吕世宽 | Bridge prestress tensioning device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB792658A (en) * | 1953-11-17 | 1958-04-02 | Ecrofnier & Partners Ltd | A method of tensioning wires for use in the production of pre-stressed concrete |
| JPS6239031Y2 (en) * | 1982-07-19 | 1987-10-05 | ||
| JP3645557B2 (en) * | 2003-08-12 | 2005-05-11 | 極東鋼弦コンクリート振興株式会社 | PC steel wire tension release device |
| CN203097301U (en) * | 2013-01-15 | 2013-07-31 | 柳州欧维姆机械股份有限公司 | Prestressed tendon tensioning pre-tensioning device |
| CN203497991U (en) * | 2013-08-16 | 2014-03-26 | 广西国森机械有限公司 | Portable prestress tension jack |
-
2013
- 2013-08-16 CN CN2013103580894A patent/CN103387191A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB792658A (en) * | 1953-11-17 | 1958-04-02 | Ecrofnier & Partners Ltd | A method of tensioning wires for use in the production of pre-stressed concrete |
| JPS6239031Y2 (en) * | 1982-07-19 | 1987-10-05 | ||
| JP3645557B2 (en) * | 2003-08-12 | 2005-05-11 | 極東鋼弦コンクリート振興株式会社 | PC steel wire tension release device |
| CN203097301U (en) * | 2013-01-15 | 2013-07-31 | 柳州欧维姆机械股份有限公司 | Prestressed tendon tensioning pre-tensioning device |
| CN203497991U (en) * | 2013-08-16 | 2014-03-26 | 广西国森机械有限公司 | Portable prestress tension jack |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108584753A (en) * | 2018-03-28 | 2018-09-28 | 哈尔滨工程大学 | Oscillating oil cylinder formula steel strand wires clamping device |
| CN112458899A (en) * | 2020-04-03 | 2021-03-09 | 吕世宽 | Bridge prestress tensioning device |
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Effective date of abandoning: 20160316 |
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