WO2018072589A1 - 钢绞线群锚整体式自动同步控制系统 - Google Patents
钢绞线群锚整体式自动同步控制系统 Download PDFInfo
- Publication number
- WO2018072589A1 WO2018072589A1 PCT/CN2017/102586 CN2017102586W WO2018072589A1 WO 2018072589 A1 WO2018072589 A1 WO 2018072589A1 CN 2017102586 W CN2017102586 W CN 2017102586W WO 2018072589 A1 WO2018072589 A1 WO 2018072589A1
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- WO
- WIPO (PCT)
- Prior art keywords
- piston
- hole
- tensioning
- jack
- steel strand
- Prior art date
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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
- B66F13/00—Common constructional features or accessories
-
- 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
-
- 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
- B66F3/30—Constructional features with positive brakes or locks
Definitions
- the present invention relates to a construction system for civil engineering, and more particularly to an integral automatic synchronization control system for a steel strand group anchor.
- Pre-clamping jacks are used for pre-tightening, which can only be pre-tightened one by one. Due to the mutual friction between the steel strands, the stress of each steel strand is uneven. Moreover, since the stroke of the jack is short, and the steel strand is long, it is necessary to manually invert the jack for multiple times, which is inefficient, labor intensive, high-altitude operation, and increases safety risks.
- the ordinary oil pump is used to provide external force to the jack, and the oil pump is manually operated.
- the common jack does not have the data acquisition such as displacement and traction. It is based on manual reading, manual control, large error and high risk.
- the object of the present invention is to provide a single automatic pre-tightening and automatic integral tensioning function for a plurality of steel strands, and an automatic continuous multi-stroke pre-tightening of the jack can be realized for the super long steel strands.
- Really and accurately collect data such as displacement and traction, and adjust the force and speed according to the data, and the synchronization is high.
- It can be used for pre-tightening and tensioning of prestressed tendons such as group anchor cables, arch bridge hangers, post-tensioned prestressed engineering, etc. It can also be used for preloading and tensioning steel strands of engineering load cables such as large component lifting and traction.
- Anchor integrated automatic synchronization control system is provided.
- a steel strand group anchor integrated automatic synchronous control system comprising a tension jack, a hydraulic pump station, a general control center, the left end of the tension jack is fixed by a lifting leg and a top plate, and the tensioning device is tensioned
- the right end of the jack is fixed with a mounting base through a lower leg;
- the pretensioning device comprises an integral multi-piston single pre-tightening
- the integral multi-piston single pre-tightening jack includes a cylinder and a piston, the cylinder has a plurality of piston holes, and each piston device constitutes a whole plurality of piston structures in the piston hole;
- the piston with a through hole has a through sleeve sleeved in the through hole, and the through sleeve is fixed to the oil cylinder to form a structure in which the piston moves relative to the oil cylinder and the through sleeve, and the components in each piston hole are combined into one
- the tight unit has a hydraulic
- the steel strand is ensured to pass through the through-hole sleeve and the single-hole tool anchor plate; the left end of each single hole of the single-hole tool anchor plate is a hole that cooperates with the working clip; the left end of the tension platform is connected with an automatic tool anchor.
- a more specific technical solution further includes: a movable top plate is connected to a left end of the single hole tool anchor plate, and the movable top plate is sleeved on a guide bar fixed on the single hole tool anchor plate, and the guide bar and the movable top plate An elastic device is installed between the elastic device, and the elastic force of the elastic device pushes the top of the movable top plate on the left end surface of the working clip.
- the hydraulic pump station includes a fuel tank, a power box, a control valve group, and a pressure sensor
- the control valve group includes a valve body, an electromagnetic reversing valve, an electronically controlled relief valve, and the control valve group is configured.
- a splitter plate with a through hole is arranged between the top plate and the automatic tool anchor, and is used for collecting the divergent steel strands in parallel so as to pass through the jack, and is disposed at the edge of the through hole of the splitter plate. Chamfering.
- the pre-tightening jack adopts a plurality of piston structures of a cylinder, has a high degree of integration, can realize the automatic pre-tightening function of multiple steel strands, and has a small working space;
- the super long steel strand can realize automatic jacking of the jack, continuous pre-tightening, high speed and low labor cost;
- a pumping station can complete the pre-tightening and overall tensioning, can control multiple pumping stations through a single control center, to achieve multi-beam pre-stress beam pre-tensioning and overall tension, and Really and accurately collect data such as displacement and tension, and adjust the force and speed according to the data.
- the synchronization is high and the stability is good.
- the wire dividing plate structure can gather the divergent steel strands in parallel for convenient threading and tensioning; the application of the anti-loose anchors can ensure the safety of the construction process.
- FIG. 1 is a schematic structural view of the present invention.
- FIG. 2 is a layout view of a cylinder and a pre-tightening unit of the integral multi-piston single pre-tightening jack A of the present invention.
- FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2.
- FIG. 4 is a schematic view showing the installation of components of a pump station panel of a steel strand group anchor integrated automatic synchronous control system according to the present invention.
- FIG. 5 is a schematic structural view of an integrated valve block.
- FIG. 6 is a hydraulic schematic diagram of an integral automatic synchronous control system for a steel strand group anchor according to the present invention.
- A pre-tightening jack
- B tensioning jack
- the present invention is provided with a pretensioning device, an integral tensioning device, a hydraulic pumping station, and a general control center, and each part is organically combined by a high pressure oil pipe, a data transmission cable and a control element.
- the hydraulic pump station drives the pretensioning device and the integral tensioning device to perform the tensioning operation according to the setting program.
- Zhang Zhang jack 8 hydraulic pump station.
- the main control center, the left end of the tensioning jack B is fixed with a pretensioning device through the upper leg 14 and the top plate 12, and the right end of the tensioning jack B is fixed with the mounting base 22 through the lower leg 20; the pretensioning device is used for the whole Before the tension is pulled, the steel wires are pre-tensioned to the initial stress state, so that the stress of each steel strand is consistent.
- the utility model comprises a pre-tightening jack A, a single-hole tool anchor, a positioning plate 11, a top plate 12, an upper leg 14, a dividing plate 13, etc.
- the pre-tensioning device comprises an integral multi-piston single pre-tightening jack A, the integral multi-piston single
- the root pre-tightening jack A comprises a cylinder 8 and a piston 9, the cylinder 8 has 7 piston holes, each piston 9 is arranged in the piston bore to form a whole 7 pistons; the piston 9 is a piston with a through hole A through sleeve 42 is sleeved in the through hole, and the through sleeve 42 is fixed to the oil cylinder 8 to form a structure in which the piston 9 moves relative to the oil cylinder 8 and the feed sleeve 42.
- the pretensioning unit has a cylinder oil hydraulic oil passage 43 communicating with each piston and a return cylinder hydraulic oil passage 44 communicating with each piston on the wall of the cylinder 8 to constitute a structure in which each piston is extended or retracted.
- the oil inlet port 10 of the hydraulic oil passage of the oil cylinder and the oil return port 7 of the hydraulic oil passage of the return cylinder communicate with the hydraulic pump station;
- the left end of the integral multi-piston single pre-tightening jack is connected with a single-hole tool anchor plate 3, the single Hole tool anchor plate 3 a hole through which the root steel strand passes, ensuring that the steel strand passes through the through sleeve, the single hole tool anchor plate 3;
- the left end of each single hole of the single hole tool anchor plate 3 is a hole that cooperates with the working clip;
- the left end of the tensioning pedestal 16 is connected with an automatic tool anchor 15, and the automatic tool anchor 15 has a hole through which a single steel strand passes, ensuring that the steel strand passes through, and each single hole at the left end of the automatic tool anchor 15 is working with The hole that the clip fits.
- a single hole tool is anchored to the front end of the piston 9, and a piston is provided with an automatic single hole tool anchor.
- the automatic single-hole tool anchor is provided with a tool anchor plate 3 and a tool clip 6.
- the tool anchor plate 3 is fixed with a guide rod 4 disposed along the axial direction of the piston 9, and the guide rod 4 is sleeved.
- a movable top plate 5 is provided, and an elastic device is installed between the limiting block at the end of the guiding rod 4 and the movable top plate 5 (the elastic device of the embodiment is a return spring 2 sleeved on the guiding rod 4), the elastic device The rightward elastic force pushes the movable top plate 5 on the left end surface of the working clip; the movable top plate 5 is placed between the tool clip 6 and the return spring 2, and the movable top plate 5 has a through steel strand hole. [0026] One end of the upper leg 14 is fixed to the tensioning jack B, and the other end is fixed to the top plate 12.
- the dividing wire 13 is disposed between the automatic tool anchor 15 and the top plate 12 fixed to the tensioning jack B and fixed to the upper leg 14. Through holes for the steel strands are set on the splitter plate 13 and the top plate 12. The function of the dividing wire 13 is to gather the divergent steel strands 1 in parallel so as to pass through the jacks, and the edges of the through holes are provided with inner chamfers to prevent the steel strands from being damaged at the corners.
- the pre-tightening jack A is fixed to the top plate 12 by the positioning plate 11 and the high-strength bolt.
- the integral tensioning device is used for the overall tensioning of the pre-force or load-bearing cable. It includes a tensioning jack B, a displacement sensor 16, an automatic tool anchor 15, a lock anchor 21, a lower leg 20, a mounting base 22, and the like.
- the displacement sensor 16 is disposed on the cylinder 17 of the tensioning jack B.
- the anti-loose anchor 21 is mounted on the base 22, and is provided with an anchor plate, a clip, a pressing plate 23 and a hollow screw 24.
- the pressing plate 23 is fixed at the left end of the anchor plate, and has a through hole, and the through hole has a hole Threaded, the hollow screw 24 is threadedly connected to the through hole.
- the function of the hollow screw 24 is for the steel strand to pass through, and the second is to dispose under the member to prevent the clip from loosening.
- the hydraulic pump station C is a power mechanism of the system, which includes a fuel tank, a variable frequency motor 29, a control valve group, a pressure sensor 32, and the like.
- the control valve group includes a valve body 31, an electromagnetic reversing valve 30, a relief valve 36, a first one-way valve 40 installed on the pre-tightening jack oil inlet path, and a second one-way valve installed on the tensioning jack oil inlet path. Valve 41, etc.
- the control valve group is provided with an oil inlet port 33 and a oil return port 34.
- Each of the oil inlet port and the oil return port is provided with an electromagnetic reversing valve for controlling a pre-tightening jack A and a tensioning jack.
- B After the pre-tightening, the second one-way valve 41 is closed, and the first one-way valve 40 is opened, the pre-tightening jack A can be driven, the first one-way valve 40 is closed, and the second one-way valve is closed. 41 ⁇ , the tension jack B can be driven; the electronically controlled relief valve 36 is disposed on the total oil inlet road for safety protection.
- control method of one embodiment of the present invention is as follows:
- [0031] After installing the device, input the pre-tightening force setting value, the tensioning force setting value or the displacement setting value through the touch screen of the main control center according to the actual needs of the project, when the tension is required as the control target Tensile force setting value, when it is necessary to use the displacement value as the control target, use the displacement setting value, and start the device, the device will automatically work as follows: [0032] 2.
- Pre-tightening The general control center issues an instruction, the first one-way valve 40 is activated, the second one-way valve 41 is closed, the electromagnetic reversing valve 30 is actuated, and the pre-tightening jack A is supplied with oil, and the hydraulic oil is self-predetermined.
- the tightening jack inlet port 10 sequentially enters each pre-tightening working unit tensioning cylinder, and each pre-tightening working unit piston 9 is extended, and the single-hole tool anchoring plate 3 carries the tool clip 6 of the clamping steel strand 1 together. Move, the slack strand 1 is tightened, and the pressure sensor 32 measures the pressure value and transmits the pressure data to the master control center. After the piston 9 is extended for one stroke, it automatically returns to the preload of the next stroke.
- the piston 9 drives the single hole tool anchor plate 3 to return, the tool clip 6 of the single hole tool anchor is reset by the return spring 2, and is Pre-tightening preparation for one stroke, the automatic tool anchor clips installed on the piston of the whole tensioning jack B are self-locking under the action of the gravity of the steel strand to prevent the steel strand from falling back, so that the reciprocating force is reached until the pre-tightening force is reached.
- Set value When a pre-tightening force of a steel strand reaches the pre-tightening set value ⁇ , the pressure sensor transmits the pressure information to the control center, the control center issues a command, and the electronically controlled relief valve 36 is activated, and the pre-tightening working unit cannot be increased.
- the piston 9 of the unit stops working, and the pre-tightening working unit corresponding to the steel strand that has not reached the pre-tightening setting force continues to work, so that until all the steel strands reach the preset value of the pre-tightening force, the control center sends out
- the electromagnetic reversing valve 30 operates to stop the supply of oil to the preloading jack A.
- the master control center can only control the work of a single pump station, and can also control more The pumping station works at the same time; one pumping station can control only one set of pre-tensioning device and the whole tensioning device, and can also control multiple sets of pre-tensioning devices and multiple sets of integral tensioning devices to work together.
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Abstract
一种钢绞线群锚整体式自动同步控制系统,设有预紧装置、整体张拉装置、液压泵站、总控中心,各部分通过高压油管、数据传输线缆及控制元件有机地结合在一起。通过总控中心发出指令,液压泵站驱动预紧装置、整体张拉装置按设定程序实现张拉工作;整体式多活塞单根预紧千斤顶包括油缸和活塞,油缸开有多个活塞孔,每个活塞装置于活塞孔内构成整体多个活塞的结构。其优点是预紧千斤顶采用一个油缸多个活塞结构,集成化程度高,可实现多根钢绞线同时自动预紧功能,对超长钢绞线可实现千斤顶自动倒张,连续预紧,速度快,人工成本低;一台泵站即可完成预紧和整体张拉,可通过一个总控中心同时控制多个泵站,实现多束预应力束同时预紧和整体张拉。
Description
钢绞线群锚整体式自动同步控制系统 技术领域
[0001] 本发明涉及一种土木工程用施工系统, 特别涉及一种钢绞线群锚整体式自动同 步控制系统。
背景技术
[0002] 在钢绞线群锚拉索、 钢绞线体外预应力索、 钢绞线吊杆索、 钢绞线系杆索、 后 张预应力筋等的张拉施工中, 一般先采用前卡式千斤顶将钢绞线单根预紧, 然 后用大吨位千斤顶整体张拉, 此方法存在如下缺陷:
[0003] ( 1 ) 采用前卡式千斤顶预紧, 只能一根一根预紧, 由于钢绞线之间产生相互 摩擦, 会导致各钢绞线受力不均匀。 而且由于千斤顶行程短, 而钢绞线且较长 , 需要对千斤顶多次人工倒张调索, 效率低, 人工劳动强度大, 高空作业, 增 加安全风险。
[0004] (2) 用普通油泵对千斤顶提供外力, 人工操作油泵, 同吋普通千斤顶不具备 位移与牵引力等数据采集, 全凭人工读数, 人工控制, 误差大, 风险大。
技术问题
[0005] 本发明的目的就是提供一种可实现多根钢绞线同吋单独自动预紧、 自动整体张 拉功能, 对超长钢绞线可实现千斤顶自动连续多行程预紧, 同吋可实吋、 准确 地采集位移、 牵引力等数据, 根据数据实吋调整力和速度, 同步性高。 可用于 群锚拉索、 拱桥吊杆、 后张预应力工程等预应力筋的预紧和张拉, 也可用于大 型构件提升、 牵引等工程承重索的预紧和张拉的钢绞线群锚整体式自动同步控 制系统。
问题的解决方案
技术解决方案
[0006] 一种钢绞线群锚整体式自动同步控制系统, 包括张拉千斤顶、 液压泵站、 总控 中心, 所述张拉千斤顶的左端通过上撑脚、 顶板固定预紧装置, 张拉千斤顶的 右端通过下撑脚固定有安装底座; 所述预紧装置包括整体式多活塞单根预紧千
斤顶, 所述的整体式多活塞单根预紧千斤顶包括油缸和活塞, 所述油缸幵有多 个活塞孔, 每个活塞装置于活塞孔内构成整体多个活塞的结构; 所述活塞为带 通孔的活塞, 其通孔内套接有穿心套, 所述穿心套固定于油缸, 形成活塞相对 于油缸和穿心套移动的结构, 每个活塞孔内的组件合为一个预紧单元, 在油缸 壁上幵有连通每个活塞的进油缸液压油通路和连通每个活塞的回油缸液压油通 路, 构成每个活塞同吋伸出或者回缩的结构, 进油缸液压油通路和回油缸液压 油通路连通液压泵站; 所述整体式多活塞单根预紧千斤顶的左端连接有单孔工 具锚板, 所述单孔工具锚板幵有单根钢绞线通过的孔, 保证钢绞线穿过穿心套 、 单孔工具锚板; 所述单孔工具锚板的每个单孔左端为与工作夹片配合的孔; 所述张拉台座左端连接有自动工具锚, 所述自动工具锚幵有单根钢绞线通过的 孔, 保证钢绞线穿过, 在自动工具锚左端的每个单孔为与工作夹片配合的孔。
[0007] 更具体的技术方案还包括: 所述单孔工具锚板的左端连接有活动顶板, 所述活 动顶板套接于固定在单孔工具锚板上的导向杆, 在导向杆与活动顶板之间安装 有弹力装置, 所述弹力装置向右的弹力推动活动顶板顶在工作夹片的左端面。
[0008] 进一步的: 所述液压泵站包括油箱、 电箱、 控制阀组、 压力传感器, 所述控制 阀组包括阀体、 电磁换向阀、 电控溢流阀, 所述控制阀组设置有进油口、 回油 口, 每个进油口、 回油口分别配有一个电磁换向阀, 所述电磁换向阀在预紧吋 用以控制一台整体式多活塞单根预紧千斤顶, 在张拉吋用以控制一台张拉千斤 顶。
[0009] 进一步的: 在顶板与自动工具锚之间设置有带通孔的分丝板, 用于将发散的钢 绞线收拢平行以便穿过千斤顶, 在分丝板的通孔边缘设有内倒角。
发明的有益效果
有益效果
[0010] 本发明的优点是:
[0011] 1、 预紧千斤顶采用一个油缸多个活塞结构, 集成化程度高, 可实现多根 钢绞线同吋自动预紧功能, 且工作空间小;
[0012] 2、 对超长钢绞线可实现千斤顶自动倒张, 连续预紧, 速度快, 人工成本 低;
[0013] 3、 一台泵站即可完成预紧和整体张拉, 可通过一个总控中心同吋控制多 个泵站, 实现多束预应力束同吋预紧和整体张拉, 并可实吋、 准确地采集位移 、 张拉力等数据, 根据数据实吋调整力和速度, 同步性高, 稳定性好;
[0014] 分丝板结构可将发散的钢绞线收拢平行, 方便穿索和张拉; 防松锚具的应用可 确保施工过程的安全性。
对附图的简要说明
附图说明
[0015] 图 1为本发明的结构示意图。
[0016] 图 2为本发明的整体式多活塞单根预紧千斤顶 A的油缸和预紧单元布置图。
[0017] 图 3是图 2的 A-A剖视图。
[0018] 图 4为本发明的钢绞线群锚整体式自动同步控制系统泵站面板零部件安装示意 图。
[0019] 图 5为集成阀组结构示意图。
[0020] 图 6为本发明的钢绞线群锚整体式自动同步控制系统液压原理图。
[0021] 图中附图标记为:
[0022] A、 预紧千斤顶, B、 张拉千斤顶, (:、 液压泵站,
[0023] 钢绞线, 2、 复位弹簧, 3、 单孔工具锚锚板, 4、 导向杆, 5、 活动顶板,
6、 工具夹片, 7、 预紧千斤顶回油口, 8、 预紧千斤顶油缸, 9、 预紧千斤 顶活塞, 10、 预紧千斤顶进油口, 11、 定位板, 12、 顶板, 13、 分丝板, 14、 上撑脚, 15、 自动工具锚, 16、 位移传感器, 17、 张拉千斤顶回油口, 18、 张 拉千斤顶进油口, 19、 张拉千斤顶油缸, 20、 下撑脚, 21、 防松锚具, 22、 安 装底座, 23、 压板, 24、 空心螺杆, 25张拉千斤顶活塞, 26、 张拉千斤顶穿心 套, 27、 预紧单元安装空间, 28、 电箱, 29、 变频电机, 30、 电磁换向阀, 31 、 阀体, 32、 压力传感器, 33、 进油口, 34、 回油口, 35、 压力表接口, 36、 电控溢流阀, 37、 力 B油口, 38、 电磁阀总阀, 39、 进油压力表, 40、 第一单向 阀, 41、 第二单向阀, 42、 穿心套, 43、 进油缸液压油通路 44、 回油缸液压油 通路, 45、 回油压力表。
实施该发明的最佳实施例
本发明的最佳实施方式
[0024] 如图 1所示, 本发明设有预紧装置、 整体张拉装置、 液压泵站、 总控中心, 各 部分通过高压油管、 数据传输线缆及控制元件有机地结合在一起。 通过总控中 心发出指令, 液压泵站驱动预紧装置、 整体张拉装置按设定程序实现张拉工作 。 其中有包括张拉千斤顶8、 液压泵站。、 总控中心, 所述张拉千斤顶 B的左端 通过上撑脚 14、 顶板 12固定有预紧装置, 张拉千斤顶 B的右端通过下撑脚 20固定 有安装底座 22; 预紧装置用于整体张拉前对各根钢线预紧到初应力状态, 使各 根钢绞线受力一致。 其包括预紧千斤顶 A、 单孔工具锚、 定位板 11、 顶板 12、 上撑脚 14、 分丝板 13等, 预紧装置包括整体式多活塞单根预紧千斤顶 A, 整体式 多活塞单根预紧千斤顶 A包括油缸 8和活塞 9, 所述油缸 8幵有 7个活塞孔, 每个活 塞 9装置于活塞孔内构成整体 7个活塞的结构; 所述活塞 9为带通孔的活塞, 其通 孔内套接有穿心套 42, 所述穿心套 42固定于油缸 8, 形成活塞 9相对于油缸 8和穿 心套 42移动的结构, 每个活塞孔内的组件合为一个预紧单元, 在油缸 8壁上幵有 连通每个活塞的进油缸液压油通路 43和连通每个活塞的回油缸液压油通路 44, 构成每个活塞同吋伸出或者回缩的结构, 进油缸液压油通路的进油口 10和回油 缸液压油通路的回油口 7连通液压泵站; 所述整体式多活塞单根预紧千斤顶的左 端连接有单孔工具锚板 3, 所述单孔工具锚板 3幵有单根钢绞线通过的孔, 保证 钢绞线穿过穿心套、 单孔工具锚板 3 ; 所述单孔工具锚板 3的每个单孔左端为与 工作夹片配合的孔; 所述张拉台座 16左端连接有自动工具锚 15, 所述自动工具 锚 15幵有单根钢绞线通过的孔, 保证钢绞线穿过, 在自动工具锚 15左端的每个 单孔为与工作夹片配合的孔。
[0025] 单孔工具锚固设在活塞 9前端, 一个活塞配一个自动单孔工具锚。 所述自动单 孔工具锚设有工具锚板 3、 工具夹片 6, 所述工具锚板 3上固设有沿所述活塞 9 的轴向设置的导向杆 4, 所述导向杆 4上套设有活动顶板 5, 在导向杆 4端头的限 位块与活动顶板 5之间安装有弹力装置 (本实施例的弹力装置为套设在导向杆 4 的复位弹簧 2) , 所述弹力装置向右的弹力推动活动顶板 5顶在工作夹片的左端 面; 所述活动顶板 5置于所述工具夹片 6和所述复位弹簧 2之间, 活动顶板 5幵有 穿钢绞线的通孔。
[0026] 所述上撑脚 14一端与张拉千斤顶 B固接, 另一端与所述顶板 12固接。 所述分丝 板 13设在固定于张拉千斤顶 B的自动工具锚 15和顶板 12之间并与上撑脚 14固接 。 在所述分丝板 13、 顶板 12上均设定穿钢绞线的通孔。 所述分丝板 13的作用是 将发散的钢绞线 1收拢平行以便穿过千斤顶, 其通孔边缘设有内倒角, 以防钢 绞线在转角处受力受损。 施工吋所述预紧千斤顶 A通过所述定位板 11和高强螺 栓与所述顶板 12固结在一起。
[0027] 整体张拉装置用于预力筋或承重索的整体张拉。 其包括张拉千斤顶 B、 位移传 感器 16、 自动工具锚 15、 防松锚具 21、 下撑脚 20、 安装底座 22等。 所述位移传 感器 16设置在所述张拉千斤顶 B的油缸 17上。 所述防松锚具 21安装在底座 22上 , 其设有锚板、 夹片、 压板 23和空心螺杆 24, 所述压板 23固设在锚板左端, 并 幵有通孔, 通孔有内螺纹, 所述空心螺杆 24与通孔螺纹连接。 空心螺杆 24的作 用一是供钢绞线穿过, 二是在构件下放吋防止夹片松脱。
[0028] 液压泵站 C是系统的动力机构, 其包括油箱、 变频电机 29、 控制阀组、 压力传 感器 32等。 所述控制阀组包括阀体 31、 电磁换向阀 30、 溢流阀 36、 安装在预紧 千斤顶进油路上的第一单向阀 40、 安装在张拉千斤顶进油路上的第二单向阀 41 等。
[0029] 控制阀组设有进油口 33、 回油口 34, 每个进油口和回油口配有一个电磁换向阀 , 用以控制一台预紧千斤顶 A和一台张拉千斤顶 B。 在预紧吋, 第二单向阀 41 关闭, 而第一单向阀 40幵启, 可驱动预紧千斤顶 A, 在整体张拉吋, 第一单向 阀 40关闭, 而第二单向阀 41幵启, 可驱动张拉千斤顶 B ; 所述电控溢流阀 36设 置在总进油路上, 起到安全保护作用。
本发明的实施方式
[0030] 本发明的一个实施的控制方法如下:
[0031] 1、 安装设备后, 通过总控中心的触摸屏输入预紧力设定值、 张拉力设定值或 位移设定值根据工程实际需要设定, 当需要以张拉力为控制目标吋用张拉力设 定值, 当需要以位移值为控制目标吋采用位移设定值, 并启动设备, 设备即自 动按如下步骤工作:
[0032] 2、 预紧: 总控中心发出指令, 第一单向阀 40幵启, 第二单向阀 41关闭, 电磁 换向阀 30动作, 给预紧千斤顶 A供油, 液压油自预紧千斤顶进油口 10依次进入 各预紧工作单元张拉油缸, 各预紧工作单元活塞 9伸长, 单孔工具锚板 3带着夹 紧钢绞线 1的工具夹片 6—起向前移, 将松弛的钢绞线 1拉紧, 同吋压力传感器 32 实吋测量压力值并将压力数据传输至总控中心。 活塞 9伸长一个行程后自动回程 进行下一行程的预紧, 在活塞 9带动单孔工具锚板 3回程吋, 单孔工具锚的工具 夹片 6在复位弹簧 2的作用下复位, 为下一行程预紧准备, 同吋安装在整体张拉 千斤顶 B活塞上的自动工具锚夹片在钢绞线重力的作用下自锁紧, 防止钢绞线 回落, 这样循环往复, 直到预紧力达到设定值。 当某一根钢绞线预紧力达到预 紧力设定值吋, 压力传感器将压力信息传输到控制中心, 控制中心发出指令, 电控溢流阀 36启动, 该预紧工作单元无法再增压, 该单元的活塞 9停止工作, 其 余没达到预紧设定力的钢绞线对应的预紧工作单元继续工作, 这样直到所有钢 绞线均达到预紧力设定值, 总控中心发出指令, 电磁换向阀 30动作, 停止对预 紧千斤顶 A供油。
[0033] 3、 整体张拉: 预紧完成后, 总控中心发出指令, 第一单向阀 40关闭, 第二单 向阀 41幵启, 电磁换向阀 30动作, 给张拉千斤顶 B供油, 张拉千斤顶 B进油并 伸缸对预应力筋进行张拉, 同吋压力传感器 32实吋测量压力值并将数据传回总 控中心, 位移传感器 16实吋测量位移值位移数据传输至总控中心。 张拉过程中 , 防松锚具 21的压板 23和空心螺栓 24可防止夹片松脱。 张拉千斤顶 B伸缸一个 行程后, 如压力或位移没有达到设定值, 则自动回程进行下一行程的张拉。 在 张拉千斤顶活塞带动自动工具锚回程吋, 自动工具锚的工具夹片在复位弹簧的 作用下复位, 为下一行程张拉准备, 防松锚具 21的夹片在钢绞线回缩力或构件 重力的作用下自锁紧, 防止钢绞线松弛或构件回落。 这样循环往复, 直到张拉 力或位移达到设定值。
[0034] 4、 调整: 拉索或构件张拉基本到位后, 往往还需要微调。 当需要将拉索或构 件下放调整吋, 将防松锚具 21的空心螺栓 24旋下, 取下夹片即可下放。
工业实用性
[0035] 在实际施工中, 根据需要, 总控中心可以只控制单台泵站工作, 也可以控制多
台泵站同吋工作; 一台泵站可以只控制单套预紧装置和整体张拉装置工作, 也 可控制多套预紧装置、 多套整体张拉装置同吋工作。
Claims
[权利要求 1] 一种钢绞线群锚整体式自动同步控制系统, 包括张拉千斤顶 (B 液压泵站 (C) 、 总控中心, 其特征在于: 所述张拉千斤顶 (B) 的 左端通过上撑脚 (14) 、 顶板 (12) 固定预紧装置, 张拉千斤顶 (B ) 的右端通过下撑脚 (20) 固定有安装底座 (22) ;所述预紧装置包 括整体式多活塞单根预紧千斤顶 (A) , 所述的整体式多活塞单根预 紧千斤顶 (A) 包括油缸 (8) 和活塞 (9) , 所述油缸 (8) 幵有多 个活塞孔, 每个活塞 (9) 装置于活塞孔内构成整体多个活塞的结构 ; 所述活塞 (9) 为带通孔的活塞, 其通孔内套接有穿心套 (42) , 所述穿心套 (42) 固定于油缸 (8) , 形成活塞 (9) 相对于油缸 (8 ) 和穿心套 (42) 移动的结构, 每个活塞孔内的组件合为一个预紧单 元, 在油缸 (8) 壁上幵有连通每个活塞的进油缸液压油通路 (43) 和连通每个活塞的回油缸液压油通路 (44) , 构成每个活塞同吋伸出 或者回缩的结构, 进油缸液压油通路的进油口 (10) 和回油缸液压油 通路的回油口 (7) 连通液压泵站; 所述整体式多活塞单根预紧千斤 顶的左端连接有单孔工具锚板 (3) , 所述单孔工具锚板 (3) 幵有单 根钢绞线通过的孔, 保证钢绞线穿过穿心套、 单孔工具锚板 (3) ; 所述单孔工具锚板 (3) 的每个单孔左端为与工作夹片配合的孔; 张 拉台座 (16) 左端连接有自动工具锚 (15) , 所述自动工具锚 (15) 幵有单根钢绞线通过的孔, 保证钢绞线穿过, 在自动工具锚 (15) 左 端的每个单孔为与工作夹片配合的孔。
[权利要求 2] 根据权利要求 1所述的钢绞线群锚整体式自动同步控制系统, 其特征 在于: 所述单孔工具锚板 (3) 的左端连接有活动顶板 (5) , 所述活 动顶板 (5) 套接于固定在单孔工具锚板 (3) 上的导向杆 (4) , 在 导向杆 (4) 与活动顶板 (5) 之间安装有弹力装置, 所述弹力装置向 右的弹力推动活动顶板 (5) 顶在工作夹片的左端面。
[权利要求 3] 根据权利要求 1所述的钢绞线群锚整体式自动同步控制系统, 其特征 在于: 所述液压泵站包括油箱、 电箱 (28) 、 控制阀组、 压力传感器
(32) , 所述控制阀组包括阀体 (31) 、 电磁换向阀 (30) 、 电控溢 流阀 (36) , 所述控制阀组设置有进油口 (33) 、 回油口 (34) , 每 个进油口 (33) 、 回油口 (34) 分别配有一个电磁换向阀, 所述电磁 换向阀在预紧吋用以控制一台整体式多活塞单根预紧千斤顶 (A) , 在张拉吋用以控制一台张拉千斤顶 (B ) 。
[权利要求 4] 根据权利要求 1所述的钢绞线群锚整体式自动同步控制系统, 其特征 在于: 在顶板 (12) 与自动工具锚 (15) 之间设置有带通孔的分丝板 (13) , 用于将发散的钢绞线 (1 ) 收拢平行以便穿过千斤顶, 在分 丝板 (13) 的通孔边缘设有内倒角。
[权利要求 5] 根据权利要求 1所述的钢绞线群锚整体式自动同步控制系统, 其特征 在于: 所述底座 (22) 左端安装有防松锚具 (21) , 所述防松锚具 ( 21) 设有锚板、 夹片、 压板 (23) 和空心螺杆 (24) , 所述压板 (23 ) 固设在锚板前端, 并幵有通孔, 通孔有内螺纹, 所述空心螺杆 (24 ) 与通孔螺纹连接。
[权利要求 6] 根据权利要求 1所述的钢绞线群锚整体式自动同步控制系统, 其特征 在于: 所述的总控中心设有电控箱、 操作中心或操作平台、 触摸屏、 PLC控制单元、 变频器、 模拟采集模块。
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CN206188304U (zh) * | 2016-10-18 | 2017-05-24 | 柳州黔桥工程材料有限公司 | 钢绞线群锚拉索整体式自动同步预紧装置 |
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CN203095516U (zh) * | 2013-01-15 | 2013-07-31 | 柳州欧维姆机械股份有限公司 | 一种钢绞线张拉千斤顶 |
CN103526948B (zh) * | 2013-10-24 | 2015-12-02 | 柳州黔桥工程材料有限公司 | 智能张拉系统的控制方法及智能张拉系统 |
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CN106315450A (zh) * | 2016-10-18 | 2017-01-11 | 柳州黔桥工程材料有限公司 | 钢绞线群锚拉索整体式自动同步预紧装置 |
CN106639329A (zh) * | 2016-10-18 | 2017-05-10 | 柳州黔桥工程材料有限公司 | 钢绞线群锚拉索整体式自动同步预紧的方法 |
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