WO2020228067A1 - 一种自动安装h型钢柱的设备 - Google Patents
一种自动安装h型钢柱的设备 Download PDFInfo
- Publication number
- WO2020228067A1 WO2020228067A1 PCT/CN2019/089465 CN2019089465W WO2020228067A1 WO 2020228067 A1 WO2020228067 A1 WO 2020228067A1 CN 2019089465 W CN2019089465 W CN 2019089465W WO 2020228067 A1 WO2020228067 A1 WO 2020228067A1
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- WO
- WIPO (PCT)
- Prior art keywords
- cantilever
- axis
- shaped steel
- motor
- steel columns
- 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.)
- Ceased
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M1/00—Power supply lines for contact with collector on vehicle
- B60M1/12—Trolley lines; Accessories therefor
- B60M1/20—Arrangements for supporting or suspending trolley wires, e.g. from buildings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M1/00—Power supply lines for contact with collector on vehicle
- B60M1/12—Trolley lines; Accessories therefor
- B60M1/28—Manufacturing or repairing trolley lines
Definitions
- the utility model belongs to the technical field of engineering machinery, and relates to the installation of an H-shaped steel column of an electrified railway catenary, in particular to a device for automatically installing the H-shaped steel column.
- the catenary is a high-voltage transmission line that is erected in a zigzag pattern over the rails in an electrified railway for the pantograph.
- the catenary is the main frame of the railway electrification project. It is a special form of transmission line that is erected along the railway line to supply power to electric locomotives. It is composed of contact suspension, support device, positioning device, pillar and foundation. The pillar and foundation are used to bear the full load of the contact suspension, support and positioning device, and the contact suspension is fixed at a specified position and height.
- Chinese catenary adopts prestressed reinforced concrete pillars and steel pillars.
- the foundation is for steel pillars, that is, the steel pillars are fixed on the foundation made of reinforced concrete below, and the foundation bears all the loads transmitted by the pillars and guarantees Stability of the pillar.
- the prestressed reinforced concrete pillars are integrated with the foundation, and the lower end is directly buried in the ground. Due to the large size and weight of the steel column, it is often necessary to use mechanical equipment for installation.
- the domestic electrification construction adopts a semi-mechanized mode.
- the steel column installation link before laying the track, the steel column is hoisted by a car crane or a car crane, and then the position of the steel column is corrected by manual assistance; in laying the track After that, the steel column was lifted by the catenary pole operation vehicle, and the installation was carried out with manual assistance.
- This method has the following shortcomings: 1.
- the degree of mechanization is low, and more manpower is required for auxiliary work.
- the work efficiency is severely restricted by the proficiency of the construction personnel, the work efficiency is low, and the construction cost is high; 2.
- the steel column is usually hoisted by ropes On the operating vehicle or crane, the steel column will shake during the movement. During the work, the worker must maintain a certain safe distance from the steel column; 3.
- the present invention aims to provide a device for automatically installing H-shaped steel columns to achieve the purpose of improving the level of mechanization, reducing the work intensity of workers, and improving work efficiency.
- a device for automatically installing H-shaped steel columns including a grabbing device for fixing the object, the grabbing device is fixed along the x axis , Y-axis, z-axis moving device, and a rotary device is fixed on the grabbing device;
- the turning device includes a beam turning mechanism that rotates the loaded object in a horizontal state to above the installation position, and also includes a cantilever turning mechanism that rotates the loaded object in a horizontal state to a vertical state.
- the grabbing device fixes the article by magnetic attraction.
- the grasping device includes a cantilever and a cross beam.
- the cantilever is vertically fixedly connected to the cross beam, and the bottom end of the cantilever is used to be fixedly connected to the object.
- the moving device includes an x-direction moving mechanism placed at the top of the cantilever to move the cantilever along the x-axis, a y-direction moving mechanism placed at the left and right ends of the beam to move the beam along the y-axis, and a y-direction moving mechanism. The bottom end of the mechanism moves the beam along the z-axis to the z-direction moving mechanism.
- both ends of the cross beam are provided with a cross beam rotation mechanism, and the cross beam rotation mechanism includes a cross beam rotation motor that drives the cross beam to rotate, and a coupling connecting the cross beam rotation motor and the cross beam.
- the cantilever turning mechanism includes a driven gear ring fixed on the cantilever and a driving gear meshing with the driven gear ring so that the driven gear ring drives the cantilever to rotate around the cantilever axis.
- the x-direction moving mechanism is a screw
- the y-direction moving mechanism is a rack and pinion
- the z-direction moving mechanism is a hydraulic cylinder
- the cantilever and the beam are both columns with an octagonal cross section.
- the bottom end of the cantilever is fixedly connected with an electromagnet
- the lead screw drives the lead screw to rotate through the x-direction motor
- the rack and pinion drives the gear to rotate through the y-direction motor.
- the hydraulic cylinder is connected with the electro-hydraulic proportional valve, and the cantilever rotary motor drives the driving gear to rotate;
- the signal input terminals are respectively connected with the control signal output terminals of the control device.
- This utility model adjusts the distance between the relative installation positions of the x-axis, y-axis, and z-axis of the article, combined with the use of the rotating device, rotates the article in the horizontal state to the vertical state and then installs it, and moves flexibly .
- the degree of mechanization is high, which is convenient for accurate and fast installation of the stuff, which greatly improves the work efficiency and reduces the labor intensity of the workers.
- the utility model adopts the method of magnetic attraction to fix the article. Compared with the method of hoisting and fixing by the steel wire rope in the prior art, the article can be stabilized in the grasping device during the movement without shaking. Reduce the risk of the installation process; and, by adopting the method of magnetic attraction, it is not only easy to fix the loaded object on the grasping device, but also easy to make the loaded object separate from the grasping device.
- the present utility model is equipped with an x-direction moving mechanism, a y-direction moving mechanism and a z-direction moving mechanism, which can simultaneously move the article in the x-axis, y-axis and z-axis directions, reducing the time for adjusting the position of the article ;
- the cantilever and beam of the present invention adopt the shape of an octagonal prism, which is stronger and has a long service life than the quadrangular prism in the prior art;
- the utility model can realize remote control through the control device, which is convenient for operation.
- the utility model has a high level of mechanization, is convenient, fast and accurate to install, reduces manpower input, and can ensure the safety of workers, and has strong practicability.
- the utility model is suitable for the installation process of the bedding, especially the bedding whose height is greater than the cross-sectional size, especially the bedding that can be magnetically absorbed, such as the installation of the H-shaped steel column of the electric railway contact net.
- Figure 1 is a schematic structural diagram of an embodiment of the utility model
- FIG. 2 is a schematic diagram of the structure of the y-direction moving mechanism and the beam turning mechanism of the embodiment of the utility model;
- FIG. 3 is a schematic diagram of the structure of the cantilever revolving mechanism and the grasping mechanism of the embodiment of the utility model;
- Figure 4 is a schematic diagram of the connection relationship of the control device of the embodiment of the present invention.
- the object is fixed by the grabbing device, and the relative installation position of the object is adjusted by the moving device to move along the x-axis, y-axis, and z-axis directions, and the object is moved by the rotating device Rotate from the horizontal state to the vertical state when it is in the installation position.
- This embodiment includes a grabbing device, a moving device, a turning device and a control device.
- the grasping device includes an electromagnet 3, a beam 1 and a cantilever 2. Both the cantilever 2 and the beam 1 are cylinders with an octagonal cross section.
- the beam 1 extends along the x-axis direction
- the cantilever 2 extends along the y-axis direction
- the cantilever 2 is vertically fixed at the center of the beam 1 in a "T" shape.
- the bottom end of the cantilever 2 is fixedly connected with an object to be loaded.
- the bottom end of the cantilever 2 can be detachably connected with the article by a threaded manner.
- the magnetic attraction is used to fix the article in this embodiment.
- the bottom end of the cantilever 2 is fixed with an electromagnet 3 for adsorbing the surface of the object.
- the object to be loaded needs to be an object with a magnetic plane
- the object to be loaded in this embodiment is an H-shaped steel column of the electric railway contact net.
- the grabbing device is fixed with a moving device that makes the grabbing device move along the x-axis, y-axis, and z-axis.
- the moving device includes an x-direction moving mechanism, a y-direction moving mechanism and a z-direction moving mechanism.
- the x-direction moving mechanism 4 is placed at the top of the cantilever 2 to move the cantilever 2 along the x-axis direction.
- the x-direction moving mechanism 4 uses a screw.
- the screw body is fixed on the cantilever 2, and the screw bolt on the screw body is fixed on the cantilever 2.
- the cantilever 2 moves in the x-axis direction along the thread on the screw body.
- the screw model is SFU5005-4. In order to improve the degree of mechanization, the lead screw is driven by the x-direction motor.
- a set of y-direction moving mechanisms are arranged on the left and right ends of the beam 1 to move the beam 1 along the y axis.
- the y-direction moving mechanism adopts the form of a gear 5 and a rack 6.
- the beam 1 is fixedly connected to at least one gear 5, and all the gears 5 mesh with a rack 6 extending along the y-axis direction.
- the gear 5 moves on the rack 6 Drive the beam 1 to move along the y axis.
- a y-direction motor 13 is fixed on the gear 5, and the y-direction motor 13 is connected to the beam 1 through a y-direction reducer of model WPDX-80-10-1.5.
- the gear 5, the y-direction motor 13 and the y-direction reducer are all fixed on the mobile trolley 14.
- a sliding slide 15 is provided under the mobile trolley 14, and as the gear 5 runs along the rack With the movement of 6, the mobile trolley 14 also moves along the slideway 15 in the y direction to ensure the stability of the cross beam 1 during the movement along the y axis.
- the z-direction moving mechanism is placed under the y-direction moving mechanism to move the beam 1 along the z-axis.
- the z-direction moving mechanism adopts the form of a hydraulic cylinder 7.
- the hydraulic cylinder 7 is fixedly connected under the slideway 15 and the rack 6 in the y-direction moving mechanism.
- At least one set of z-direction moving mechanisms can be provided.
- each group of y A hydraulic cylinder 7 is provided at each end of the moving mechanism, and a total of four hydraulic cylinders 7 are provided.
- the hydraulic cylinder 7 is connected with an electro-hydraulic proportional valve, and the electro-hydraulic proportional valve controls the lifting.
- the four hydraulic cylinders 7 are raised and lowered at the same time, the height is 1700mm when not raised, and the maximum height is 3300mm.
- the power of the hydraulic cylinder 7 is provided by the hydraulic pump station.
- the pump station selects a gear oil pump with a rated pressure of 20Mpa and a maximum pressure of 25Mpa, driven by 4 7.5kw motors and a flow rate of 35L/min.
- the turning device includes a beam turning mechanism that rotates the loaded object in a horizontal state to above the installation position, and a cantilever turning mechanism that rotates the loaded object in a horizontal state to a vertical state.
- Each of the left and right ends of the beam 1 is provided with a set of beam rotation mechanisms, and the beam rotation mechanism includes a beam rotation motor 8 and a coupling 9.
- the coupling 9 is fixedly connected to the moving trolley 14 of the y-direction moving mechanism, so that the coupling 9 moves along the y-direction with the moving trolley 14.
- the coupling 9 connects the beam 1 and the beam rotation motor 8.
- the beam rotation motor 8 uses a servo motor, which controls the speed of the beam 1 by controlling the speed of the servo motor.
- the rotation of the beam 1 around its axis drives the object to be rotated to the installation position Above.
- the cross beam rotating motor 8 and the coupling 9 are connected by a double-stage reducer: the motor cycloid reducer XWVCD-3-4-71, and the worm gear reducer WHX2880-1-30.
- the cantilever rotation mechanism is placed on the cantilever 2, and the cantilever rotation mechanism includes a driven ring gear 10 and a driving gear 11.
- the bottom surface of the driven ring gear 10 is fixedly connected to the lower part of the cantilever 2, and the center of the top surface of the driven ring gear 10 is hinged to the upper part of the cantilever 2 through a hinge shaft.
- the driven ring gear 10 meshes with at least one driving gear 11 through the driving gear 11
- the rotation of ⁇ drives the driven ring gear 10 to rotate, so that the lower part of the cantilever 2 rotates around its own axis.
- the driving gear 11 is driven to rotate by a cantilever rotary motor 12, and the cantilever rotary motor 12 and the driving gear 11 are connected through a reducer. By controlling the rotation speed of the cantilever rotation motor 12, the rotation process of the cantilever 2 is controlled.
- the control device can realize intelligent control. 4, the control signal input end of the electro-hydraulic proportional valve is connected to the control signal output end of the electro-hydraulic proportional valve control circuit, and the control signal input end of the electro-hydraulic proportional valve control circuit is connected to the control signal output end of the electro-hydraulic proportional valve of the control device;
- the control signal input end of the electromagnet 3 is connected to the control signal output end of the control circuit of the electromagnet 3, and the control line number input end of the control circuit of the electromagnet 3 is connected to the control signal output end of the electromagnet 3 of the control device;
- x-direction motor control The signal input end is connected to the x-direction motor control signal output end of the control device, the y-direction motor 13 control signal input end is connected to the y-direction motor 13 control signal output end of the control device, and the control signal input end of the beam rotating motor 8 is connected to the control The control signal output end of the beam rotating motor 8 of the device is connected, and the control
- control device and electromagnet 3 control circuit all adopt conventional circuits in the prior art.
- the connection relationship and model of control device and electromagnet 3, control device and electro-hydraulic proportional valve, control device and x-direction motor, control device and y-direction motor 13, control device and beam rotation motor 8, control device and cantilever rotation motor 12 All use existing well-known technologies.
- the method of automatically installing H-shaped steel columns includes the following steps:
- the control device controls the electromagnet 3 to be energized, and the middle part of the loaded object in a horizontal state is magnetically fixed to the bottom end of the cantilever 2 of the grasping device by the electromagnet 3.
- the control device controls the rotation of the screw through the x-direction motor, and the screw adjusts the position of the object in the x-axis direction.
- the connection line between the cantilever 2 and the center of the installation position is parallel to the plane of the y-z axis; the control device controls the movement of the gear 5 along the rack 6 through the y-direction motor 13 to adjust the position of the object in the y-axis direction.
- the control device controls the lifting of the hydraulic cylinder 7 through the electro-hydraulic proportional valve, so as to adjust the position of the loaded object in the z-axis direction, so that the horizontal state of the loaded object is There is enough space for rotation when rotating to the vertical position;
- the beam rotation mechanism 8 is used to adjust the rotating position of the loaded object on the plane where the y-axis-z axis is located.
- the control device controls the rotation of the beam rotating motor 8 to control the beam 1 to rotate around the axis of the beam 1 to rotate the object to be above the installation position;
- the installation position referred to here is directly above the installation position, which can make the article in the horizontal state rotate to the vertical The position aligned with the installation position after the straight state.
- the cantilever revolving mechanism rotates the horizontally loaded object 90° to the vertical state:
- the control device controls the rotation of the cantilever rotary motor 12, so that the rotation of the driving gear 11 drives the driven ring gear 10 to rotate, rotates the cantilever 2 around the axis of the cantilever 2, and finally turns the object to be installed from the horizontal state to the vertical state.
- the state at the installation location controls the rotation of the cantilever rotary motor 12, so that the rotation of the driving gear 11 drives the driven ring gear 10 to rotate, rotates the cantilever 2 around the axis of the cantilever 2, and finally turns the object to be installed from the horizontal state to the vertical state.
- the state at the installation location controls the rotation of the cantilever rotary motor 12, so that the rotation of the driving gear 11 drives the driven ring gear 10 to rotate, rotates the cantilever 2 around the axis of the cantilever 2, and finally turns the object to be installed from the horizontal state to the vertical state. The state at the installation location.
- the lowering of the hydraulic cylinder is controlled by the control device through the electro-hydraulic proportional valve, so that the loaded object falls vertically along the z-axis direction to the installation position, and the loaded object is fixed in the installation position by bolts;
- the object is placed above the installation position and the object is not aligned with the installation position, that is, the object is directly above the deviation from the installation position, and the position of the object is fine-tuned through the x-direction moving mechanism 4 and the y-direction moving mechanism.
- the z-direction moving mechanism will lower the loaded object to the installation position, namely:
- the control device controls the rotation of the screw through the x-direction motor, and adjusts the position of the object in the x-axis direction by the screw; the control device controls the movement of the gear 5 along the rack 6 through the y-direction motor 13 to adjust the mounted The position of the object in the y-axis direction, so that the object to be loaded is aligned with the installation position. Then the control device controls the lowering of the hydraulic cylinder 7 through the electro-hydraulic proportional valve, so that the loaded object falls vertically along the z-axis direction to the installation position, and the loaded object is fixed in the installation position by bolts.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Manipulator (AREA)
- Electric Cable Installation (AREA)
- Load-Engaging Elements For Cranes (AREA)
Abstract
Description
Claims (10)
- 一种自动安装H型钢柱的设备,包括用于固定被装物的抓取装置,其特征在于:抓取装置上固定有使抓取装置沿x轴、y轴、z轴移动的移动装置,抓取装置上还固定有回转装置;回转装置包括将处于水平状态被装物旋转至安装位置上方的横梁回转机构,还包括将处于水平状态被装物旋转至竖直状态的悬臂回转机构。
- 根据权利要求1所述的一种自动安装H型钢柱的设备,其特征在于:抓取装置通过磁吸固定被装物。
- 根据权利要求1所述的一种自动安装H型钢柱的设备,其特征在于:抓取装置包括悬臂及横梁,悬臂垂直固定连接在横梁上,悬臂底端用于与被装物固定相连。
- 根据权利要求3所述的一种自动安装H型钢柱的设备,其特征在于:移动装置包括置于悬臂顶端使悬臂沿x轴移动的x向移动机构、置于横梁左右两端使横梁沿y轴移动的y向移动机构及置于y向移动机构底端使横梁沿z轴移动的z向移动机构。
- 根据权利要求4所述的一种自动安装H型钢柱的设备,其特征在于:横梁的两端皆设有横梁回转机构,横梁回转机构包括驱动横梁转动的横梁回转电机以及连接横梁回转电机与横梁的联轴器。
- 根据权利要求5所述的一种自动安装H型钢柱的设备,其特征在于:悬臂回转机构包括固定在悬臂上的从动齿圈以及与从动齿圈啮合使从动齿圈带动悬臂绕悬臂轴线转动的主动齿轮。
- 根据权利要求6所述的一种自动安装H型钢柱的设备,其特征在于:x向移动机构为丝杠,y向移动机构为齿轮齿条,z向移动机构为液压缸。
- 根据权利要求3-7中任意一项所述的一种自动安装H型钢柱的设备,其特征在于:悬臂及横梁均为截面为八边形的柱体。
- 根据权利要求6所述的一种自动安装H型钢柱的设备,其特征在于:悬臂底端固定连接有电磁铁,丝杠通过x向电机驱动丝杠转动,齿轮齿条通过y向电机驱动齿轮转动。
- 根据权利要求9所述的一种自动安装H型钢柱的设备,其特征在于:液压缸与电 液比例阀相连,悬臂回转电机驱动主动齿轮转动;电液比例阀的控制信号输入端、电磁铁的控制信号输入端、x向电机的控制信号输入端、y向电机的控制信号输入端、横梁回转电机的控制信号输入端、悬臂回转电机的控制信号输入端分别与控制装置的控制信号输出端相连。
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920686266.4 | 2019-05-14 | ||
| CN201920686266.4U CN209163593U (zh) | 2019-05-14 | 2019-05-14 | 一种自动安装h型钢柱的设备 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2020228067A1 true WO2020228067A1 (zh) | 2020-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CN2019/089465 Ceased WO2020228067A1 (zh) | 2019-05-14 | 2019-05-31 | 一种自动安装h型钢柱的设备 |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN209163593U (zh) |
| LU (1) | LU102796B1 (zh) |
| WO (1) | WO2020228067A1 (zh) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114526009A (zh) * | 2022-02-22 | 2022-05-24 | 长沙矿山研究院有限责任公司 | 提高ygz-90钻机便捷性的改装方法 |
| CN118723838A (zh) * | 2024-09-02 | 2024-10-01 | 上海策元实业有限公司 | 一种路灯杆移动安装台及使用方法 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110017053A (zh) * | 2019-05-14 | 2019-07-16 | 中铁电气化局集团有限公司石家庄机械装备分公司 | 一种自动安装h型钢柱的设备 |
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| DE10236237A1 (de) * | 2002-08-07 | 2004-02-19 | Förster Drucklufttechnik GmbH | Anordnung zum automatischen Positionieren von Pfosten für Leitplankensysteme |
| DE102004018385A1 (de) * | 2004-04-16 | 2005-11-03 | Rationelle Technik Im Maschinenbau Rtm Gmbh | Vorrichtung zum Setzen von Bauteilen, wie Pfosten,Pfählen oder dergleichen |
| CN106522643A (zh) * | 2016-12-25 | 2017-03-22 | 济宁山云宇内机电科技有限公司 | 一种多功能立柱机器人 |
| CN108678533A (zh) * | 2018-05-29 | 2018-10-19 | 国网山东省电力公司济南市章丘区供电公司 | 一种电线杆立杆设备 |
| CN109305178A (zh) * | 2018-09-14 | 2019-02-05 | 湖北时瑞达重型工程机械有限公司 | 一种机械手立杆平车 |
-
2019
- 2019-05-14 CN CN201920686266.4U patent/CN209163593U/zh active Active
- 2019-05-31 WO PCT/CN2019/089465 patent/WO2020228067A1/zh not_active Ceased
- 2019-05-31 LU LU102796A patent/LU102796B1/en active IP Right Grant
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10236237A1 (de) * | 2002-08-07 | 2004-02-19 | Förster Drucklufttechnik GmbH | Anordnung zum automatischen Positionieren von Pfosten für Leitplankensysteme |
| DE102004018385A1 (de) * | 2004-04-16 | 2005-11-03 | Rationelle Technik Im Maschinenbau Rtm Gmbh | Vorrichtung zum Setzen von Bauteilen, wie Pfosten,Pfählen oder dergleichen |
| CN106522643A (zh) * | 2016-12-25 | 2017-03-22 | 济宁山云宇内机电科技有限公司 | 一种多功能立柱机器人 |
| CN108678533A (zh) * | 2018-05-29 | 2018-10-19 | 国网山东省电力公司济南市章丘区供电公司 | 一种电线杆立杆设备 |
| CN109305178A (zh) * | 2018-09-14 | 2019-02-05 | 湖北时瑞达重型工程机械有限公司 | 一种机械手立杆平车 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114526009A (zh) * | 2022-02-22 | 2022-05-24 | 长沙矿山研究院有限责任公司 | 提高ygz-90钻机便捷性的改装方法 |
| CN114526009B (zh) * | 2022-02-22 | 2022-11-25 | 长沙矿山研究院有限责任公司 | 提高ygz-90钻机便捷性的改装方法 |
| CN118723838A (zh) * | 2024-09-02 | 2024-10-01 | 上海策元实业有限公司 | 一种路灯杆移动安装台及使用方法 |
| CN118723838B (zh) * | 2024-09-02 | 2025-04-25 | 上海策元实业有限公司 | 一种路灯杆移动安装台及使用方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| LU102796B1 (en) | 2021-08-31 |
| CN209163593U (zh) | 2019-07-26 |
| LU102796A1 (en) | 2021-05-14 |
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