CN113957804A - Portable installation prestressing force stretch-draw jack device - Google Patents
Portable installation prestressing force stretch-draw jack device Download PDFInfo
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- CN113957804A CN113957804A CN202111409478.6A CN202111409478A CN113957804A CN 113957804 A CN113957804 A CN 113957804A CN 202111409478 A CN202111409478 A CN 202111409478A CN 113957804 A CN113957804 A CN 113957804A
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- support arm
- transverse
- trapezoidal vertical
- portable installation
- connecting rod
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- Bridges Or Land Bridges (AREA)
Abstract
The utility model provides a portable installation prestressing force stretch-draw jack device, includes trapezoidal vertical supporting leg (101) of first way, trapezoidal vertical supporting leg (102) of second way, bearing arm (103) to one side, horizontal support arm (100), transverse connection pole (105), electronic hoist and mount system (109), pulley system (108), roller bearing (107), transverse connection steel sleeve (106), terminal backstop steel sheet (110), the balanced stable hook of anchor (111) and lock wheel of stopping (112). The device has the advantages of optimized, simple and clear structure, convenient assembly and disassembly, convenient movement, good stability and strong flexibility; the method has the advantages that the hoisting position of the prestress tensioning jack is determined more quickly and conveniently, and the method is suitable for various poor construction environments, so that the problem of low prestress tensioning construction efficiency in the support cast-in-place box girder is solved better.
Description
Technical Field
The invention relates to a portable device for installing a prestress tensioning jack, and belongs to the technical field of prestress construction.
Background
The full framing cast-in-place method is still a very hot construction method in the construction of many urban viaducts and highway bridges.
The cast-in-place prestressed multi-box-chamber large box girder of the support is mostly prestressed in three directions, namely, transverse, longitudinal and vertical prestressed steel strands are tensioned, so that the situation that the prestressed steel strands cannot be tensioned inside the narrow box girder and at the end part of the cross beam is avoided.
The jack used in the existing prestress construction is huge in volume and weight, and is inconvenient to hoist and position when prestress tensioning is carried out at the narrow position, and inconvenient to carry, so that the production efficiency is reduced, and the construction progress is seriously influenced.
Disclosure of Invention
The invention aims to realize more portable and faster hoisting position positioning and carrying of a prestress jack in the tensioning process of prestress steel strands in a complex, narrow and poor environment on a support cast-in-place box girder so as to solve the problem of low prestress tensioning construction efficiency in the support cast-in-place box girder, and provides a portable installation prestress tensioning jack device.
The technical scheme includes that the portable installation prestress tensioning jack device comprises a first trapezoidal vertical supporting leg, a second trapezoidal vertical supporting leg, an inclined supporting arm, a transverse connecting rod, an electric hoisting system, a pulley system, a rolling shaft, a transverse connecting steel sleeve, a terminal stop steel plate, an anchoring balance stabilizing hook and a locking brake wheel; the top and the middle of the first trapezoidal vertical supporting leg are respectively connected with a transverse connecting rod; the transverse connecting rod arranged at the top of the first trapezoidal vertical supporting leg is vertical to the transverse supporting arm and is connected with the transverse supporting arm through a bolt; the top and the middle of the second trapezoidal vertical supporting leg are respectively connected with a transverse connecting rod; the transverse connecting rod arranged at the top of the second trapezoidal vertical supporting leg is vertical to the transverse supporting arm and is connected with the transverse supporting arm through a bolt; one end of the inclined supporting arm is connected with a transverse connecting rod arranged in the middle of the second trapezoidal vertical supporting leg, and the other end of the inclined supporting arm is connected with a transverse connecting steel sleeve arranged on the top transverse supporting arm; an electric hoisting system is arranged on the transverse supporting arm; the electric hoisting system is connected with the pulley system and is used for stably operating the jack under the hoisting system through longitudinal self-locking movement of the pulley system and transverse, longitudinal and vertical multi-direction automatic control of the electric hoisting system; the end, close to the tail part of the first trapezoidal vertical supporting leg, of the transverse supporting arm is connected with a terminal stop steel plate; the anchoring balance and stability hook is connected with the lower part of the terminal stop steel plate.
The two first trapezoidal vertical supporting legs and the two transverse connecting rods with different lengths form a first isosceles trapezoid structure with the first trapezoidal vertical supporting leg as an oblique edge and the two transverse connecting rods with different lengths as parallel edges; the two second trapezoidal vertical supporting legs and the two transverse connecting rods with different lengths form a second isosceles trapezoid structure with the second trapezoidal vertical supporting legs as oblique edges and the two connecting rods with different lengths as parallel edges; when a first isosceles trapezoid structure and a second isosceles trapezoid structure which are vertical to the horizontal ground are parallel to each other and are separated by a certain distance, one end of each transverse supporting arm is vertically connected with the middle point of the transverse connecting rod at the upper part of the first isosceles trapezoid structure, the middle part of each transverse supporting arm is vertically connected with the middle point of the transverse connecting rod at the upper part of the second isosceles trapezoid structure, and the other end of each transverse supporting arm is suspended; the two isosceles trapezoid structures and the transverse supporting arm form a firm triangular frame cantilever structure.
The transverse supporting arm is I-shaped steel.
The inclined supporting arm is of a U-shaped structure.
The electric hoisting system is a self-suction motor and consists of a motor, a transmission device and an automatic folding angle device; the motor is connected with the transmission device and is arranged on the automatic folding angle device.
The pulley system is provided with four rolling shafts, and the four rolling shafts are respectively connected with two sides of the transverse supporting arm in an embedding mode in a two-row and two-row arrangement mode.
And the terminal stop steel plate is welded with the tail part of the transverse supporting arm and used for preventing the pulley system from sliding out of the transverse supporting arm.
The anchoring balance and stability hook is mechanically connected with the tail terminal stop steel plate and used for preventing the device from being unstable due to unbalance in the using process.
The device has the advantages of optimized, simple and clear structure, convenient assembly and disassembly, convenient movement, good stability and strong flexibility; the method has the advantages that the hoisting position of the prestress tensioning jack is determined more quickly and conveniently, and the method is suitable for various poor construction environments, so that the problem of low prestress tensioning construction efficiency in the support cast-in-place box girder is solved better.
Drawings
FIG. 1 is a front view of a portable installation prestressed tensioning jack apparatus of the present invention;
FIG. 2 is a top view of a portable installation prestressed tensioning jack apparatus of the present invention;
FIG. 3 is a left side view of a portable installation prestressed tensioning jack apparatus of the present invention;
FIG. 4 is a right side view of a portable installation prestressed tensioning jack apparatus of the present invention;
in the drawings, 100 is a transverse support arm; 101 is a first trapezoidal vertical supporting leg; 102 is a second trapezoidal vertical supporting leg; 103 is an inclined supporting arm; 104 is a high-strength bolt; 105 is a transverse connecting rod; 106 is a transverse connecting steel sleeve; 107 is a roller; 108 is a pulley system; 109 is an electric hoisting system; 110 is a terminal stop steel plate; 111 is anchoring balance stable hook; 112 is a lock brake wheel.
Detailed Description
The specific embodiment of the present invention is shown in fig. 1 to 4.
The embodiment provides a portable installation prestressing force tensioning jack device, including trapezoidal vertical support leg 101 of first way, trapezoidal vertical support leg 102 of second way, oblique support arm 103, horizontal support arm 100, transverse connection rod 105, electronic hoist and mount system 109, pulley system 108, roller 107, transverse connection steel sleeve 106, high-strength bolt 104, terminal backstop steel sheet 110, anchor balanced stable hook 111, lock wheel 112 of stopping.
The top and the middle of the first trapezoidal vertical supporting leg 101 of the embodiment are both provided with a transverse connecting rod 105 connected with the first trapezoidal vertical supporting leg; the top transverse connecting rod 105 of the first trapezoidal vertical supporting leg 101 is connected with the transverse supporting arm 100 in a bolt mode; the top and the middle of the second trapezoidal vertical supporting leg 102 are both provided with a transverse connecting rod 105 connected with the second trapezoidal vertical supporting leg; the top transverse connecting rod 105 of the second trapezoidal vertical supporting leg 102 is connected with the transverse supporting arm 100 in a bolt mode; one end of the inclined supporting arm 103 is connected with a transverse connecting rod 105 in the middle of the second trapezoidal vertical supporting leg 102, and the other end of the inclined supporting arm is connected with the top transverse supporting arm 100 through a transverse connecting steel sleeve 106; an electric hoisting system 109 is arranged on the transverse supporting arm 100; the electric hoisting system 109 is connected with the pulley system 108, and the stable operation is carried out on the jack under the hoisting system 109 through the longitudinal self-locking movement of the pulley system 108 and the transverse, longitudinal and vertical multi-direction automatic control of the electric hoisting system 109; the tail part of the transverse supporting arm 100 is connected with a terminal stop steel plate 110; the anchoring balance stabilizing hook 111 is connected to the end stopper steel plate 110 at a lower portion thereof.
Specifically, in the portable installation prestress tensioning jack device of the embodiment, the first trapezoidal vertical supporting leg 101 and the second trapezoidal vertical supporting leg 102 are made of U-shaped carbon steel, and the bending resistance of the cross section is enhanced.
All the transverse connecting rods 105 of the embodiment are made of H-shaped carbon steel and are connected with the first trapezoidal vertical supporting leg 101 and the second trapezoidal vertical supporting leg 102 through arc welding.
The bolts used in this embodiment are all high-strength bolts 105, and the bolts are distributed in two rows and are respectively connected with the transverse supporting arm 100 at two ends of the transverse connecting rod 105.
The transverse support arm 100 of this embodiment is an i-shaped carbon steel, the cross-section providing increased bending resistance.
The electric hoisting system 109 of the present embodiment is an electric hoist. The purpose is for hoist and mount jack more swiftly.
The shape of the diagonal support arm 100 of this embodiment is "U" and the cross section of the high strength twisted steel used in the diagonal support arm 100 is circular.
In this embodiment, the transverse connection steel sleeve 106 is made of U-shaped carbon steel, and is sleeved on the connection rod between the oblique support arm 103 and the transverse support arm 100.
The pulley system 108 of this embodiment has four rollers 107 and is connected to the two sides of the lateral brace 100 by two rows and two rows in an embedded manner.
The end stop plate 110 of this embodiment is welded to the lateral support arm 100 at the rear thereof in order to prevent the pulley system 108 from slipping out of the lateral support arm.
The anchoring balance stabilizing hook 111 of this embodiment is mechanically connected to the tail end stop steel plate 110 in order to prevent the device from being unstable due to unbalance during use.
The method for installing the jack comprises the following steps:
the first step is as follows: and (5) paving the field, moving the device for automatically installing the jack to a previous-stage work preparation place, and opening the automatic locking brake wheel.
The second step is that: and (4) switching on a power supply, starting the pulley system, longitudinally moving to the position right above the jack, and self-locking the pulley in the guide rail to prevent sliding.
The third step: and starting the electric hoisting system, and hoisting the jack to the position to be stretched of the beam at the end of the box girder.
The fourth step: the jack is adjusted to be aligned with the steel bundle through transmission through an automatic folding angle device of the electric hoisting system, and tensioning operation is carried out.
Therefore, the portable installation prestress tensioning jack device has the characteristics of small volume, light weight and high flexibility, can quickly position the tensioning position of the hoisting jack, greatly facilitates the transportation, installation and use of the jack in the prestress tensioning process, and can be better adapted to a plurality of narrow and small complex environments.
The above embodiments are described in further detail for the purpose of illustrating the invention, and it should be understood that the above embodiments are illustrative only, and the present invention is not limited to the description of the portable prestressed tension jack device.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111409478.6A CN113957804A (en) | 2021-11-25 | 2021-11-25 | Portable installation prestressing force stretch-draw jack device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111409478.6A CN113957804A (en) | 2021-11-25 | 2021-11-25 | Portable installation prestressing force stretch-draw jack device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113957804A true CN113957804A (en) | 2022-01-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111409478.6A Pending CN113957804A (en) | 2021-11-25 | 2021-11-25 | Portable installation prestressing force stretch-draw jack device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113957804A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115627704A (en) * | 2022-11-02 | 2023-01-20 | 中铁三局集团线桥工程有限公司 | Jack synchronous and rapid transporting device in box girder erection and construction method thereof |
| CN116623560A (en) * | 2023-07-10 | 2023-08-22 | 中铁十九局集团第三工程有限公司 | A semi-automatic shelf for T-beam tensioning |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103787203A (en) * | 2013-12-16 | 2014-05-14 | 重庆岩安科技有限公司 | Support frame for mounting precast beam jack |
| CN212639754U (en) * | 2020-06-30 | 2021-03-02 | 中建筑港集团有限公司 | Movable prestressing force stretch-draw jack suspension |
| KR102304974B1 (en) * | 2020-08-06 | 2021-09-24 | 방재훈 | Portable multi-tensioning device |
| CN216275268U (en) * | 2021-11-25 | 2022-04-12 | 中交四公局第三工程有限公司 | Portable installation prestressing force stretch-draw jack device |
-
2021
- 2021-11-25 CN CN202111409478.6A patent/CN113957804A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103787203A (en) * | 2013-12-16 | 2014-05-14 | 重庆岩安科技有限公司 | Support frame for mounting precast beam jack |
| CN212639754U (en) * | 2020-06-30 | 2021-03-02 | 中建筑港集团有限公司 | Movable prestressing force stretch-draw jack suspension |
| KR102304974B1 (en) * | 2020-08-06 | 2021-09-24 | 방재훈 | Portable multi-tensioning device |
| CN216275268U (en) * | 2021-11-25 | 2022-04-12 | 中交四公局第三工程有限公司 | Portable installation prestressing force stretch-draw jack device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115627704A (en) * | 2022-11-02 | 2023-01-20 | 中铁三局集团线桥工程有限公司 | Jack synchronous and rapid transporting device in box girder erection and construction method thereof |
| CN116623560A (en) * | 2023-07-10 | 2023-08-22 | 中铁十九局集团第三工程有限公司 | A semi-automatic shelf for T-beam tensioning |
| CN116623560B (en) * | 2023-07-10 | 2025-09-05 | 中铁十九局集团第三工程有限公司 | A semi-automatic frame for T-beam tensioning |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20220119 Address after: 100123 21st floor, international innovation and Exhibition Center, No.25, ganluyuan Nanli, Chaoyang District, Beijing Applicant after: THIRD ENGINEERING CO., LTD. OF CCCC FOURTH HIGHWAY ENGINEERING Co.,Ltd. Applicant after: East China Jiaotong University Applicant after: CCCC FOURTH HIGHWAY ENGINEERING Co.,Ltd. Address before: 100123 21st floor, international innovation and Exhibition Center, No.25, ganluyuan Nanli, Chaoyang District, Beijing Applicant before: THIRD ENGINEERING CO., LTD. OF CCCC FOURTH HIGHWAY ENGINEERING Co.,Ltd. Applicant before: East China Jiaotong University |
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| TA01 | Transfer of patent application right | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |