CN104860226A - Prestress tensioning jack equipment with adjustable limiting device - Google Patents
Prestress tensioning jack equipment with adjustable limiting device Download PDFInfo
- Publication number
- CN104860226A CN104860226A CN201510206906.3A CN201510206906A CN104860226A CN 104860226 A CN104860226 A CN 104860226A CN 201510206906 A CN201510206906 A CN 201510206906A CN 104860226 A CN104860226 A CN 104860226A
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- Prior art keywords
- draw
- limiting device
- stretch
- adjustable limiting
- piston
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Classifications
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- 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
- B66F3/42—Constructional features with self-contained pumps, e.g. actuated by hand
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention provides prestress tensioning jack equipment with an adjustable limiting device, and belongs to the technical field of prestress construction equipment. The prestress tensioning jack equipment comprises a prestress tensioning jack device, wherein the prestress tensioning jack device comprises a tensioning cylinder, a tensioning piston, a tensioning pump and a liquid return pump; the tensioning piston is positioned in the tensioning cylinder; the tensioning pump and the liquid return pump are respectively communicated with the two ends of the tensioning cylinder; the adjustable limiting device comprises a jacking pressing cylinder, a jacking pressing piston, an elastic recovery mechanism and a jacking part; the jacking pressing piston is axially and movably arranged in the jacking pressing cylinder; one end of the jacking pressing cylinder is communicated with the liquid return pump; the jacking pressing piston is aligned to the jacking part in a position at the other end of the jacking pressing cylinder; the jacking pressing piston pushes the jacking part to enable working clips to be pressed into a working anchor; the jacking part is connected with the elastic recovery mechanism, so that the jacking part can compress the elastic recovery mechanism after being pushed by the jacking pressing piston, or can push the jacking pressing piston under the action of the elastic recovery mechanism. The prestress tensioning jack equipment with the adjustable limiting device can effectively improve the prestress tensioning precision, and can ensure high engineering safety and reliability.
Description
Technical field
The invention belongs to prestressed Construction Technology field, relate to a kind of jacking equipment, especially prestressed stretch-draw jacking equipment.
Background technology
Prestressed stretch-draw process is the important step of prestress of concrete tension construction, strains prestressing tendon by jack, to structural beams application of stress, makes structural beams generation camber upwards, to improve the load-carrying capacity of structural beams.
In prestressed stretch-draw process, stretching force and prestressing tendon elongation are controlled, directly can affect prestressed structure service life.In the research and development and construction of prestressed reinforced concrete construction beam construction project, effective stress is its key point.If effective stress is excessive, the intensity of construction material (as anchor cable) will be jeopardized, and cause the distortion of supporting body excessive simultaneously, and then jeopardize engineering safety; If effective stress is too small, stress can be not enough, distortion will be caused excessive, cause engineering to lose efficacy in operation.
Therefore, effectively and accurately control stretch-draw prestressing force, become the gordian technique that prestress is implemented, there is important Research Significance and very strong using value.
Summary of the invention
The object of the present invention is to provide a kind of structure simple, can accurately lock prestress stretching reinforcing bar, makes pulling force and elongation meet the prestressed stretch-draw jacking equipment with adjustable limiting device of expected value.
In order to achieve the above object, solution of the present invention is:
A kind of prestressed stretch-draw jacking equipment with adjustable limiting device, comprise prestressed stretch-draw jack device, described prestressed stretch-draw jack device comprises tension cylinder, is positioned at the stretch-draw piston of tension cylinder, is communicated with the stretch-draw pump at described tension cylinder two ends respectively and returns liquid pump; Piston, elastic recovery mechanism and head part are pressed in the top that described adjustable limiting device comprises top-bearing jar, axial movable cloth is placed in described top-bearing jar; Described top-bearing jar one end is communicated with described time liquid pump; Described top pressure piston aims at head part at the other end of described top-bearing jar, is pressed in work anchor to be pressed piston by described top by promoting head part by work clip sheet; Described head part connects described elastic recovery mechanism, to compress described elastic recovery mechanism or promote described top pressure piston return under the promotion of described top pressure piston under the effect of described elastic recovery mechanism.
The oil-feed port place connecting tee valve of described time liquid pump, the other two ends of described triple valve are communicated with described tension cylinder and described top-bearing jar one end back to described head part respectively.
Be connected by quick coupling between described triple valve with described top-bearing jar.
Described elastic recovery mechanism comprises top pressure head and top pressure spring; Described head part is push pipe; Described top pressure head comprises top pressure head body and top pressure head is protruding; Described push pipe comprises push pipe and push pipe is protruding; Described top pressure head is protruding towards described push pipe body; Described push pipe is protruding towards described top pressure head body; It is protruding that described top pressure spring one end connects described top pressure head, and it is protruding that the other end connects described push pipe.
Described adjustable limiting device is the taper tubular not with pinnacle, and the direction that cross-sectional diameter reduces is the direction pointing to described head part from top pressure piston.
The cylinder body of described top-bearing jar is support sleeve, and described support sleeve is the circular cone tubular not with pinnacle.
The tapered drum internal diameter of the adjustable limiting device of described taper tubular is more than or equal to be waited to act on prestressed diameter.
Described stretch-draw pump is stretching oil pump, and described time liquid pump is dump pump; Described tension cylinder is stretch-draw oil cylinder, and described top-bearing jar is top compressing cylinder.
Described adjustable limiting device also comprises the adapter sleeve towards prestressed stretch-draw jack device one end, and described adapter sleeve has storage tank towards one end of described prestressed stretch-draw jack device; Described stretch-draw piston is positioned at described storage tank.
This equipment also comprises upper end and is fixedly connected with described adapter sleeve with the cylinder body of described top-bearing jar, lower end and describedly push up the top anchoring part of pressing piston fit; Side near described stretch-draw jack device on the anchoring part of described top is fixedly connected with instrument anchor ring; The inner side of described instrument anchor ring has opening, is provided with tool clamping piece in opening; Described top anchoring part limits described tool clamping piece from the side near described adjustable limiting device.
Owing to adopting such scheme, the invention has the beneficial effects as follows: the present invention is with the prestressed stretch-draw jacking equipment of adjustable limiting device, before stretching process terminates, initiatively start the pressurization of dump pump fuel feeding, push pipe is promoted by pushing up pressure piston by fluid power transmission, thus Prestressed work-clip is in place forward, send in work anchor with brute force.Invention effectively eliminates prior art by prestressing tendon resilience, the stretch-draw loss that the mode of operation driving work clip sheet to enter work anchor causes, more adequately can ensure the effective stress of prestressing tendon.
Accompanying drawing explanation
Fig. 1 is the structural representation of the prestressed stretch-draw jacking equipment with adjustable limiting device of the embodiment of the present invention.
In accompanying drawing: 1, push up pressure head; 2, top pressure spring; 3, push pipe; 4, support sleeve; 5, top pressure piston; 6, anchoring part is pushed up; 7, adapter sleeve; 8, tool clamping piece; 9, instrument anchor ring; 10, tension cylinder; 11, stretch-draw piston; 12, stretching oil pump; 13, dump pump; 14, work clip sheet; 15, work anchor.
Detailed description of the invention
Below in conjunction with accompanying drawing illustrated embodiment, the present invention is further illustrated.
The present invention proposes a kind of prestressed stretch-draw jacking equipment with adjustable limiting device, Figure 1 shows that the structural representation of this equipment.This prestressed stretch-draw jacking equipment adds an adjustable limiting device in the front end of existing stretch-draw jack device, be specially a hydraulically adjustable inhibiting device, wherein stretch-draw jack device comprise tension cylinder 10, be positioned at the stretch-draw piston 11 of tension cylinder 10, the stretching oil pump 12 being communicated with these tension cylinder 10 two ends respectively and dump pump 13.
Above-mentioned adjustable limiting device then comprises top-bearing jar, is positioned at the top of top-bearing jar pressure piston 5, elastic recovery mechanism and push pipe 3.As shown in Figure 1, the present invention is taper tubular not with pinnacle with the prestressed stretch-draw jacking equipment monnolithic case of adjustable limiting device.Top-bearing jar is the support sleeve 4 of the taper tubular not with pinnacle, and the top axial movable cloth of pressure piston 5 is placed in this support sleeve 4.The oil-feed port place connecting tee valve of dump pump 13, in the other two ends of this triple valve, one end is communicated with tension cylinder 10, and the other end is communicated with top-bearing jar by quick coupling, i.e. one end of the close stretch-draw jack device of support sleeve 4.
Elastic recovery mechanism comprises top pressure head 1 and top pressure spring 2, and top pressure head 1 comprises top pressure head body and top pressure head is protruding; Push pipe 3 comprises push pipe body and push pipe is protruding.Top pressure head 1 is the taper tubular not with pinnacle, and push pipe 3 is positioned within the tubular of top pressure head 1; Top pressure head is protruding towards push pipe body, and push pipe is protruding towards top pressure head body, thus top pressure head 1 and push pipe 3 define an inner chamber; Top pressure spring 2 is positioned at this inner chamber, and it is protruding that one end connects top pressure head, and other end connecting jacking pipe is protruding.Therefore, if push pipe 3 pushes up the motion that pressure head 1 makes compression top pressure spring 2 relatively, this inner chamber reduces; If push pipe 3 relatively top pressure head 1 does the motion of replying top pressure spring 2, this inner chamber increases.
In the present embodiment, adapter sleeve 4 and top pressure head 1 are for being in adjacent two sections of outside in taper tubular structure, top pressure head 1 is positioned at adapter sleeve 4 is communicated with dump pump 13 one end back to it, and top pressure piston 5 aims at push pipe 3 at this end.Therefore, when pushing up pressure piston 5 and moving towards the direction of push pipe 3 in adapter sleeve 4, push pipe 3 can be promoted and move.In practice of construction process, by push pipe 3 alignment work intermediate plate 14, work clip sheet 14 can be pushed in work anchor 15.
This adjustable limiting device monnolithic case is in the taper tubular not with pinnacle, and the direction that cross-sectional diameter reduces is the direction pointing to push pipe 3 from top pressure piston 5.The internal diameter change of the taper tubular of this adjustable limiting device is little, is a bit larger tham or equals to treat the diameter of effect prestressing tendon.
Because this adjustable limiting device propulsion source medium used is oil, therefore 1 tension cylinder 10 is stretch-draw oil cylinder, and top-bearing jar is top compressing cylinder.
In addition, in order to realize the connection of adjustable limiting device and stretch-draw jack device, one end near stretch-draw jack device on adjustable limiting device is also provided with adapter sleeve 7, adapter sleeve 7 is equally also the taper tubular not with pinnacle, its one end towards stretch-draw jack device has storage tank, the profile of this storage tank and the form fit of stretch-draw piston 11, stretch-draw piston 11 is positioned at this accommodating hole.
In adjustable limiting device, be also provided with top anchoring part 6, the upper end of top anchoring part 6 is fixedly connected with adapter sleeve 7 with support sleeve 4, presses piston 5 fit in lower end and top.Top anchoring part 6 on the left side (namely in the side near stretch-draw jack device) is fixedly connected with instrument anchor ring 9, the inner side (namely near the inner side of conical bush) of instrument anchor ring 9 has opening, and the internal diameter of this opening increases gradually along from adjustable limiting device to the direction of stretch-draw jack device.Tool clamping piece 8 is provided with, the profile of tool clamping piece 8 towards the side of instrument anchor ring 9 and the form fit of this opening in the opening of instrument anchor ring 9.Top anchoring part 6 extending tool anchor ring 9 to the inside in radial directions, thus can carry out spacing to tool clamping piece 8, block tool clamping piece 8 and do not depart from from instrument anchor ring 9.The left side of tool clamping piece 8 is connected with spring, and the other end of this spring is connected on stretch-draw jack device.
During work, this equipment is positioned at position as shown in Figure 1, is namely positioned at the left side of component, and stretch-draw jack device is positioned at the left side of adjustable limiting device.First stretch-draw jack device starts work, by stretching oil pump 12 to oil transportation in tension cylinder 10, promotes stretch-draw piston 11 and moves to right relative to tension cylinder 10; Adjustable limiting device is fixed, therefore the trend that is moved to the left under antagonistic force of stretch-draw jack device in work progress.Now, instrument anchor ring 9 and stretch-draw piston 11 move toward one another, tool clamping piece 9 is under the friction of prestressing tendon drives, fit with instrument anchor ring 8 and compress, cause tool clamping piece 9 to tighten and reinforce prestressing tendon, thus tool clamping piece 9 moves relative to stretch-draw piston 11 together with instrument anchor ring 8, pulling force is applied to prestressing tendon, pulls prestressing tendon to stretch from component.When the stretching of prestressing tendon arrives target stretch-draw value, stretching oil pump 12 stops, to tension cylinder 10 oil transportation, now entering and holding the lotus stage, maintains the current tensile state of prestressing tendon.Holding the later stage in lotus stage, controlling dump pump 13 to oil transportation in top-bearing jar by triple valve, driving top pressure piston 5 to move right, promote push pipe 3 and move right, until work clip sheet 14 is headed in work anchor 15.Head into after in work anchor 15 until work clip sheet 14, top pressure piston 5 arrives the end position of right lateral, therefore dump pump 13 cannot continue oil transportation in top-bearing jar, under the effect of the pressure, a large amount of pressure oils is transfused in the tension cylinder 10 of stretch-draw jack device, promotes stretch-draw piston 11 to left movement, stretch-draw jack device return, loosen prestressing tendon, stretching process terminates.
In said process, the present invention can guarantee to hold lotus in the target prestress stage realize target time with the prestressed stretch-draw jacking equipment of adjustable limiting device; Meanwhile, effectively prevent the stretch-draw loss that traditional dependence cable wire resilience drives work clip sheet to enter work anchor to cause.Therefore, the present invention can ensure the precision of effective stretch-draw prestressing force, has ensured the safety and reliability of engineering.
Above-mentioned is can understand and apply the invention for ease of those skilled in the art to the description of embodiment.Person skilled in the art obviously easily can make various amendment to these embodiments, and General Principle described herein is applied in other embodiments and need not through performing creative labour.Therefore, the invention is not restricted to embodiment here, those skilled in the art, according to announcement of the present invention, do not depart from improvement that scope makes and amendment all should within protection scope of the present invention.
Claims (10)
1. the prestressed stretch-draw jacking equipment with adjustable limiting device, comprise prestressed stretch-draw jack device, described prestressed stretch-draw jack device comprises tension cylinder, is positioned at the stretch-draw piston of tension cylinder, is communicated with the stretch-draw pump at described tension cylinder two ends respectively and returns liquid pump, it is characterized in that: piston, elastic recovery mechanism and head part are pressed in the top that described adjustable limiting device comprises top-bearing jar, axial movable cloth is placed in described top-bearing jar;
Described top-bearing jar one end is communicated with described time liquid pump; Described top pressure piston aims at head part at the other end of described top-bearing jar, is pressed in work anchor to be pressed piston by described top by promoting head part by work clip sheet;
Described head part connects described elastic recovery mechanism, to compress described elastic recovery mechanism or promote described top pressure piston return under the promotion of described top pressure piston under the effect of described elastic recovery mechanism.
2. the prestressed stretch-draw jacking equipment with adjustable limiting device according to claim 1, it is characterized in that: the oil-feed port place connecting tee valve of described time liquid pump, the other two ends of described triple valve are communicated with described tension cylinder and described top-bearing jar one end back to described head part respectively.
3. the prestressed stretch-draw jacking equipment with adjustable limiting device according to claim 2, be is characterized in that: be connected by quick coupling between described triple valve with described top-bearing jar.
4. the prestressed stretch-draw jacking equipment with adjustable limiting device according to claim 1, is characterized in that: described elastic recovery mechanism comprises top pressure head and top pressure spring; Described head part is push pipe;
Described top pressure head comprises top pressure head body and top pressure head is protruding; Described push pipe comprises push pipe and push pipe is protruding;
Described top pressure head is protruding towards described push pipe body; Described push pipe is protruding towards described top pressure head body; It is protruding that described top pressure spring one end connects described top pressure head, and it is protruding that the other end connects described push pipe.
5. the prestressed stretch-draw jacking equipment with adjustable limiting device according to claim 1, it is characterized in that: described adjustable limiting device is the taper tubular not with pinnacle, and the direction that cross-sectional diameter reduces is the direction pointing to described head part from top pressure piston.
6. the prestressed stretch-draw jacking equipment with adjustable limiting device according to claim 5, is characterized in that: the cylinder body of described top-bearing jar is support sleeve, and described support sleeve is the circular cone tubular not with pinnacle.
7. the prestressed stretch-draw jacking equipment with adjustable limiting device according to claim 5, is characterized in that: the tapered drum internal diameter of the adjustable limiting device of described taper tubular is more than or equal to be waited to act on prestressed diameter.
8. the prestressed stretch-draw jacking equipment with adjustable limiting device according to claim 1, it is characterized in that: described stretch-draw pump is stretching oil pump, described time liquid pump is dump pump; Described tension cylinder is stretch-draw oil cylinder, and described top-bearing jar is top compressing cylinder.
9. the prestressed stretch-draw jacking equipment with adjustable limiting device according to claim 1, it is characterized in that: described adjustable limiting device also comprises the adapter sleeve towards prestressed stretch-draw jack device one end, described adapter sleeve has storage tank towards one end of described prestressed stretch-draw jack device; Described stretch-draw piston is positioned at described storage tank.
10. the prestressed stretch-draw jacking equipment with adjustable limiting device according to claim 9, it is characterized in that: this equipment also comprises upper end and is fixedly connected with described adapter sleeve with the cylinder body of described top-bearing jar, lower end and describedly push up the top anchoring part of pressing piston fit; Side near described stretch-draw jack device on the anchoring part of described top is fixedly connected with instrument anchor ring; The inner side of described instrument anchor ring has opening, is provided with tool clamping piece in opening; Described top anchoring part limits described tool clamping piece from the side near described adjustable limiting device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510206906.3A CN104860226A (en) | 2015-04-27 | 2015-04-27 | Prestress tensioning jack equipment with adjustable limiting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510206906.3A CN104860226A (en) | 2015-04-27 | 2015-04-27 | Prestress tensioning jack equipment with adjustable limiting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104860226A true CN104860226A (en) | 2015-08-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510206906.3A Pending CN104860226A (en) | 2015-04-27 | 2015-04-27 | Prestress tensioning jack equipment with adjustable limiting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104860226A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113605739A (en) * | 2021-09-13 | 2021-11-05 | 安徽省路港工程有限责任公司 | Prestressed FRP rib tensioning and anchoring device |
| CN113640126A (en) * | 2021-10-13 | 2021-11-12 | 中国矿业大学(北京) | Rock-soil prestressed anchor cable or anchor rod tensioning device |
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| CN2440798Y (en) * | 2000-04-20 | 2001-08-01 | 柳州市建筑机械总厂 | Front blocked jack |
| CN2511746Y (en) * | 2001-12-07 | 2002-09-18 | 王继成 | Prestressed stretchy mechanism |
| JP2004162351A (en) * | 2002-11-12 | 2004-06-10 | Sumitomo Denko Steel Wire Kk | Tension device |
| CN2652905Y (en) * | 2003-06-10 | 2004-11-03 | 焦金太 | Prestress hydraulic pre-press anti-rotary front clamp type jack |
| CN2695428Y (en) * | 2004-05-17 | 2005-04-27 | 铁道科学研究院 | Front clamp type low expansion lifting jack |
| CN104163387A (en) * | 2013-05-16 | 2014-11-26 | 吕洪伟 | Prestress tensioning jack |
| CN204714438U (en) * | 2015-04-27 | 2015-10-21 | 同济大学 | A kind of prestressed stretch-draw jacking equipment with adjustable limiting device |
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2015
- 2015-04-27 CN CN201510206906.3A patent/CN104860226A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2440798Y (en) * | 2000-04-20 | 2001-08-01 | 柳州市建筑机械总厂 | Front blocked jack |
| CN2511746Y (en) * | 2001-12-07 | 2002-09-18 | 王继成 | Prestressed stretchy mechanism |
| JP2004162351A (en) * | 2002-11-12 | 2004-06-10 | Sumitomo Denko Steel Wire Kk | Tension device |
| CN2652905Y (en) * | 2003-06-10 | 2004-11-03 | 焦金太 | Prestress hydraulic pre-press anti-rotary front clamp type jack |
| CN2695428Y (en) * | 2004-05-17 | 2005-04-27 | 铁道科学研究院 | Front clamp type low expansion lifting jack |
| CN104163387A (en) * | 2013-05-16 | 2014-11-26 | 吕洪伟 | Prestress tensioning jack |
| CN204714438U (en) * | 2015-04-27 | 2015-10-21 | 同济大学 | A kind of prestressed stretch-draw jacking equipment with adjustable limiting device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113605739A (en) * | 2021-09-13 | 2021-11-05 | 安徽省路港工程有限责任公司 | Prestressed FRP rib tensioning and anchoring device |
| CN113640126A (en) * | 2021-10-13 | 2021-11-12 | 中国矿业大学(北京) | Rock-soil prestressed anchor cable or anchor rod tensioning device |
| CN113640126B (en) * | 2021-10-13 | 2022-01-11 | 中国矿业大学(北京) | Rock-soil prestressed anchor cable or anchor rod tensioning device |
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Application publication date: 20150826 |
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