CN104649180A - Internal clamping type tension jack and construction method thereof - Google Patents
Internal clamping type tension jack and construction method thereof Download PDFInfo
- Publication number
- CN104649180A CN104649180A CN201410282618.1A CN201410282618A CN104649180A CN 104649180 A CN104649180 A CN 104649180A CN 201410282618 A CN201410282618 A CN 201410282618A CN 104649180 A CN104649180 A CN 104649180A
- Authority
- CN
- China
- Prior art keywords
- piston
- positioning plate
- anchor slab
- plate
- jack
- 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.)
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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
- B66F3/25—Constructional features
-
- 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
- B66F3/26—Adaptations or arrangements of pistons
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
-
- 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
- B66F2700/00—Lifting apparatus
- B66F2700/05—Hydraulic jacks
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses an internal clamping type tension jack and a construction method thereof and relates to the technical field of tension equipment. The internal clamping type tension jack comprises a limit plate with the front end being pressed on a working anchor plate; the rear end of the limit plate is in compression joint with an oil cylinder piston through a limit plate backing ring; a tool anchor plate is arranged inside the piston; the tool anchor plate is connected with a piston rod of a piston through threads. Compared with the prior art, the internal clamping type tension jack reserves rotation space for the tool anchor plate, the tool anchor can be easily rotate to any angles with an axis of a prestressing tendon being served as a center of a circle when the tool anchor is installed, a hole of the tool anchor can be easily aligned, a reserved steel strand can penetrate the hole of the tool anchor to install the tool anchor, and angles of the tension jack are not required to rotate. The construction method is simple and the operation is simple and convenient.
Description
Technical field
The present invention relates to tensioning equipment technical field, especially a kind of inner blocking type stretch-draw jack and construction method thereof.
Background technology
Since three more than ten years, prestressed concrete is widely used in the modern projects such as large public building, executive information systems, Longspan Bridge and multi storied industrial factory building, especially the circuit major part of express highway, high speed railway special line is made up of bridge, the major bearing structures of bridge adopts prestressed reinforced concrete construction, wherein, preset for simple prestressed concrete beam is by special tensioning equipment application of stress, and jack has become indispensable as tensioning equipment.Existing inner blocking type stretch-draw jack, substantially be jack and moveable anchor be integrated connection shape structure, when constructing, because work ground tackle is all have the arrangement of position, directivity hole mostly, in erose, thus to rotate the hole that the moveable anchor be fixed on jack removes alignment work anchor during construction, need to rotate together with jack to put up with mounted work anchor, could steel strand be passed.Because jack substantially cannot rotate under lifting state, thus construct extremely difficult, another split type front clamping type jack is then comparatively loaded down with trivial details in the process of installing, and is not easy to construction.
Summary of the invention
The invention provides a kind of inner blocking type stretch-draw jack and construction method thereof, it can solve existing stretch-draw jack complex operation, be not easy to the problem of construction.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is: it comprises front end and is pressed in positioning plate on work anchor slab, the rear end of this positioning plate is crimped with oil cylinder piston by positioning plate gasket ring, this piston is built-in with instrument anchor slab, and described instrument anchor slab is connected by the piston rod of screw thread with described piston.
In technique scheme, scheme can also be more specifically: outside described piston rod, cover has support tube, one end of this support tube is connected with described positioning plate gasket ring by socket head cap screw, the other end of described support tube is connected with closing plate before ring-type by outside thread, before this ring-type, the outer circumference surface of closing plate crimps with oil cylinder inner wall, and before described ring-type, the termination of closing plate crimps with described oil cylinder piston.
Further: described oil cylinder piston is provided with ground floor inner bore of step and second layer inner bore of step, the described ground floor endoporus being arranged at described instrument anchor slab junction is greater than the reference circle passing steel strand extreme spread in described instrument anchor slab, and the second layer diameter of bore being arranged at described piston and described piston rod junction is greater than described ground floor diameter of bore.
Be used for by above-mentioned jack in construction, its construction method step is:
A, be enclosed within the overhanging end of steel strand by work anchor, work clip sheet, positioning plate successively, the front end stage portion of positioning plate is pressed on work anchor slab;
B, the jack assembly with instrument anchor slab to be moved to just to the position of positioning plate, execute tool anchor slab of changing a job, the Kong Weiyi of its Kong Weiyu positioning plate is put, after steel strand, then mounting tools intermediate plate;
C, to pressurize to oil cylinder A mouth oil nozzle fuel feeding, piston stretches out backward and makes anchoring cone plate hole and taper-type dropper intermediate plate clamp steel strand when moving backward to carry out stretch-draw, jack assembly makes the counter-force top of jack be pressed on positioning plate by positioning plate gasket ring, and hydraulic coupling pushing tow piston backward.
When anchor is moved back in D, unloading, to the pressurization of B mouth oil nozzle fuel feeding, piston reverses direction is moved, and is moved left by piston driving instrument anchor slab, releasing tool intermediate plate, takes out tool clamping piece, can take out stretch-draw jack, until it is for subsequent use to take off positioning plate.
Owing to adopting technique scheme, the present invention compared with prior art, has following beneficial effect:
1, because instrument anchor slab adopts screw thread to be connected with piston rod, reserve the revolution space of instrument anchor slab, during mounting tools anchor with prestressing tendon axis for the center of circle lightly rotates to arbitrarily angled, can the position, hole of light alignment work anchor through reserved steel strand mounting tools anchor, without the need to rotating stretch-draw jack angle, construction method is simple, easy and simple to handle.
2, minimum reserve 200mm length steel strand just can stretch-draw, a large amount of cost saving material of construction, and structure is simple, the operation of convenient construction personnel.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the structural representation of construction method step A of the present invention.
Fig. 3 is the structural representation of construction method step B of the present invention.
Fig. 4 is the structural representation of construction method step C of the present invention.
Fig. 5 is the structural representation of construction method D step of the present invention.
Detailed description of the invention
In the present embodiment, each parts are detailed as follows:
1, steel strand, 2, anchor plate, 3, work anchor slab, 4, work clip sheet, 5, positioning plate, 6, positioning plate gasket ring, 7, instrument anchor slab, 8, tool clamping piece, 9, support tube, 10, front closing plate, 11, A hydraulic fluid port, 12, piston, 13, oil cylinder, 14, B hydraulic fluid port, 15, rear sealing nut, 16, rear hold-down ring.
Below in conjunction with attached Example, the invention will be further described:
This inner blocking type stretch-draw jack as shown in Figure 1, it comprises front end and is pressed in positioning plate 5 on work anchor slab 3, the rear end of this positioning plate is crimped with oil cylinder piston 12 by positioning plate gasket ring 6, this piston is built-in with instrument anchor slab 7, instrument anchor slab 7 is connected by the negative thread of outside thread with the piston rod 12-1 of piston 12, reserve the revolution space of instrument anchor slab, during mounting tools anchor with prestressing tendon axis for the center of circle lightly rotates to arbitrarily angled, can the position, hole of light alignment work anchor through reserved steel strand mounting tools anchor, without the need to rotating stretch-draw jack angle; Outside piston rod 12-1, cover has support tube 9, one end of this support tube 9 is connected with positioning plate gasket ring 6 by socket head cap screw, the other end of support tube 9 is connected with closing plate 10 before ring-type by outside thread, before this ring-type, the outer circumference surface of closing plate crimps with oil cylinder 13 inwall, and before ring-type, the termination of closing plate 10 crimps with oil cylinder piston 12; Oil cylinder piston 12 is provided with ground floor inner bore of step and second layer inner bore of step, the ground floor inner bore of step being arranged at instrument anchor slab 7 junction passes the reference circle of steel strand 1 extreme spread in instrument anchor slab 7, namely the circle diameter that multiple steel strand holes that ground floor inner bore of step diameter is provided with to greatest extent in instrument anchor slab surround, be arranged at piston 12 and be greater than ground floor inner bore of step diameter with the second layer inner bore of step diameter of piston rod 12-1 junction, so, spatial hole is large, is convenient to mounting tools intermediate plate 8.
Be used for by above-mentioned jack in construction, its construction method step is:
A, be enclosed within the overhanging end of steel strand 1 by work anchor 3, work clip sheet 4, positioning plate 5 successively, the front end stage portion of positioning plate 5 is pressed on work anchor slab 3, as shown in Figure 2;
B, the jack assembly with instrument anchor slab 7 to be moved to just to the position of positioning plate 5, execute tool anchor slab 7 of changing a job, the Kong Weiyi of its Kong Weiyu positioning plate 5 is put, after steel strand 1, then mounting tools intermediate plate 8, as shown in Figure 3;
C, to pressurize to oil cylinder A mouth oil nozzle fuel feeding, piston 12 stretches out backward and makes anchoring cone plate hole and taper-type dropper intermediate plate 8 clamp steel strand when moving backward to carry out stretch-draw, jack assembly makes the counter-force top of jack be pressed on positioning plate 5 by positioning plate gasket ring 6, and hydraulic coupling pushing tow piston 12 backward.
When anchor is moved back in D, unloading, to the pressurization of B mouth oil nozzle fuel feeding, piston 12 counter motion, drives instrument anchor slab 7 to left movement by piston 12, releasing tool intermediate plate 8, takes out tool clamping piece 8, can take out stretch-draw jack, until it is for subsequent use to take off positioning plate, jack construction is complete.
Claims (4)
1. an inner blocking type stretch-draw jack, comprise front end and be pressed in positioning plate (5) on work anchor slab (3), the rear end of this positioning plate is crimped with oil cylinder piston (12) by positioning plate gasket ring (6), this piston is built-in with instrument anchor slab (7), it is characterized in that: described instrument anchor slab (7) is connected with the piston rod (12-1) of described piston (12) by screw thread.
2. inner blocking type stretch-draw jack according to claim 1, it is characterized in that: described piston rod (12-1) outside cover has support tube (9), one end of this support tube (9) is connected with described positioning plate gasket ring (6) by socket head cap screw, the other end of described support tube (9) is connected with closing plate (10) before ring-type by outside thread, before this ring-type, the outer circumference surface of closing plate crimps with oil cylinder (13) inwall, and before described ring-type, the termination of closing plate (10) crimps with described oil cylinder piston (12).
3. inner blocking type stretch-draw jack according to claim 1 and 2, it is characterized in that: described oil cylinder piston (12) is provided with ground floor inner bore of step and second layer inner bore of step, the described ground floor endoporus being arranged at described instrument anchor slab (7) junction is greater than the reference circle passing steel strand extreme spread in described instrument anchor slab (7), and the second layer diameter of bore being arranged at described piston and described piston rod junction is greater than described ground floor diameter of bore.
4. a construction method for inner blocking type stretch-draw jack as claimed in claim 1, is characterized in that:
Construct according to following steps:
A, be enclosed within the overhanging end of steel strand (1) by work anchor (3), work clip sheet (4), positioning plate (5) successively, the front end stage portion of positioning plate (5) is pressed on work anchor slab (3);
B, the jack assembly with instrument anchor slab (7) is moved to just to the position of positioning plate (5), execute tool anchor slab (7) of changing a job, the Kong Weiyi of its Kong Weiyu positioning plate (5) is put, after steel strand (1), then mounting tools intermediate plate (8);
C, to pressurize to oil cylinder A mouth oil nozzle fuel feeding, piston (12) stretches out backward and makes anchoring cone plate hole and taper-type dropper intermediate plate (8) clamp steel strand when moving backward to carry out stretch-draw, jack assembly makes the counter-force top of jack be pressed on positioning plate (5) by positioning plate gasket ring (6), and hydraulic coupling pushing tow piston (12) backward;
When anchor is moved back in D, unloading, pressurize to B mouth oil nozzle fuel feeding, piston (12) counter motion, drive instrument anchor slab (7) to left movement by piston (12), releasing tool intermediate plate (8), take out tool clamping piece (8), can stretch-draw jack be taken out, until it is for subsequent use to take off positioning plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410282618.1A CN104649180B (en) | 2014-06-24 | 2014-06-24 | Inner blocking type stretch-draw jack and its construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410282618.1A CN104649180B (en) | 2014-06-24 | 2014-06-24 | Inner blocking type stretch-draw jack and its construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104649180A true CN104649180A (en) | 2015-05-27 |
| CN104649180B CN104649180B (en) | 2017-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410282618.1A Active CN104649180B (en) | 2014-06-24 | 2014-06-24 | Inner blocking type stretch-draw jack and its construction method |
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| CN (1) | CN104649180B (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105502200A (en) * | 2016-01-18 | 2016-04-20 | 柳州泰姆预应力机械有限公司 | Intelligent front-clamping jack capable of facilitating construction and easy to install and maintain |
| CN105881736A (en) * | 2016-06-04 | 2016-08-24 | 中铁十九局集团第五工程有限公司 | Post-tensioned prestressed box girder steel strand threading device and threading method thereof |
| CN106744462A (en) * | 2017-01-09 | 2017-05-31 | 苏州市能工基础工程有限责任公司 | For the jack of drawing steel stranded wire |
| CN107884276A (en) * | 2017-11-24 | 2018-04-06 | 山东高速工程检测有限公司 | A kind of anchor drawing force checking device and detection method for improving detection level |
| CN108103946A (en) * | 2017-12-21 | 2018-06-01 | 中国十九冶集团有限公司 | Tensioning device applied to small space construction |
| CN108190782A (en) * | 2018-03-01 | 2018-06-22 | 柳州煜乾机械装备股份公司 | For the interior card jack to the deeper girder tensioning of beam-ends tensioning duct notch |
| CN108425500A (en) * | 2018-02-01 | 2018-08-21 | 重庆恒佳工程技术咨询有限公司 | A kind of non-return system of intelligent tensioning presstressed reinforcing steel |
| CN111794520A (en) * | 2020-06-17 | 2020-10-20 | 安徽金星预应力工程技术有限公司 | Steel strand prestress tensioning device and method |
| CN112318926A (en) * | 2020-10-15 | 2021-02-05 | 中冶重工（唐山）有限公司 | Zipper type pre-tightening device and method for hydraulic machine |
| CN114620636A (en) * | 2022-04-26 | 2022-06-14 | 杨军 | Tensioning jack |
| CN116255013A (en) * | 2022-11-25 | 2023-06-13 | 中国建筑第二工程局有限公司 | Prestress tensioning jack |
| CN117486114A (en) * | 2024-01-03 | 2024-02-02 | 河南丽卡数控设备有限公司 | Multi-hole front clamping jack |
| CN116255013B (en) * | 2022-11-25 | 2024-10-29 | 中国建筑第二工程局有限公司 | Prestress tensioning jack |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| GB1527601A (en) * | 1974-12-10 | 1978-10-04 | Buildinter Ag | Jack for stressing and anchoring tendons |
| CN201882850U (en) * | 2010-12-03 | 2011-06-29 | 河南红桥锚机有限公司 | Tensioning hydraulic jack with prestressed tendon |
| CN102674196A (en) * | 2012-06-08 | 2012-09-19 | 柳州泰姆预应力机械有限公司 | Split front-clamping type tensioning jack and construction method thereof |
| CN203199934U (en) * | 2013-04-17 | 2013-09-18 | 周启武 | Front-clamping type tensioning jack |
| CN203682979U (en) * | 2013-12-31 | 2014-07-02 | 合肥杨晨工程技术有限公司 | Anchor group front clamping type jack |
| CN204097000U (en) * | 2014-06-24 | 2015-01-14 | 柳州市威尔姆预应力有限公司 | Inner blocking type stretch-draw jack |
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2014
- 2014-06-24 CN CN201410282618.1A patent/CN104649180B/en active Active
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105502200A (en) * | 2016-01-18 | 2016-04-20 | 柳州泰姆预应力机械有限公司 | Intelligent front-clamping jack capable of facilitating construction and easy to install and maintain |
| CN105881736A (en) * | 2016-06-04 | 2016-08-24 | 中铁十九局集团第五工程有限公司 | Post-tensioned prestressed box girder steel strand threading device and threading method thereof |
| CN106744462B (en) * | 2017-01-09 | 2022-07-26 | 苏州市能工基础工程有限责任公司 | Jack for drawing steel strand |
| CN106744462A (en) * | 2017-01-09 | 2017-05-31 | 苏州市能工基础工程有限责任公司 | For the jack of drawing steel stranded wire |
| CN107884276A (en) * | 2017-11-24 | 2018-04-06 | 山东高速工程检测有限公司 | A kind of anchor drawing force checking device and detection method for improving detection level |
| CN108103946A (en) * | 2017-12-21 | 2018-06-01 | 中国十九冶集团有限公司 | Tensioning device applied to small space construction |
| CN108103946B (en) * | 2017-12-21 | 2019-04-16 | 中国十九冶集团有限公司 | Tensioning device applied to small space construction |
| CN108425500A (en) * | 2018-02-01 | 2018-08-21 | 重庆恒佳工程技术咨询有限公司 | A kind of non-return system of intelligent tensioning presstressed reinforcing steel |
| CN108190782A (en) * | 2018-03-01 | 2018-06-22 | 柳州煜乾机械装备股份公司 | For the interior card jack to the deeper girder tensioning of beam-ends tensioning duct notch |
| CN111794520A (en) * | 2020-06-17 | 2020-10-20 | 安徽金星预应力工程技术有限公司 | Steel strand prestress tensioning device and method |
| CN112318926A (en) * | 2020-10-15 | 2021-02-05 | 中冶重工（唐山）有限公司 | Zipper type pre-tightening device and method for hydraulic machine |
| CN114620636A (en) * | 2022-04-26 | 2022-06-14 | 杨军 | Tensioning jack |
| CN116255013A (en) * | 2022-11-25 | 2023-06-13 | 中国建筑第二工程局有限公司 | Prestress tensioning jack |
| CN116255013B (en) * | 2022-11-25 | 2024-10-29 | 中国建筑第二工程局有限公司 | Prestress tensioning jack |
| CN117486114A (en) * | 2024-01-03 | 2024-02-02 | 河南丽卡数控设备有限公司 | Multi-hole front clamping jack |
| CN117486114B (en) * | 2024-01-03 | 2024-03-05 | 河南丽卡数控设备有限公司 | Multi-hole front clamping jack |
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