CN103539034A - Prestress tension jack clamping device - Google Patents
Prestress tension jack clamping device Download PDFInfo
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- CN103539034A CN103539034A CN201310465691.8A CN201310465691A CN103539034A CN 103539034 A CN103539034 A CN 103539034A CN 201310465691 A CN201310465691 A CN 201310465691A CN 103539034 A CN103539034 A CN 103539034A
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- spring
- tool clamping
- top cover
- clamping piece
- anchor
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Abstract
The invention relates to a prestress tension jack clamping device, and belongs to the technical field of building construction. A tension piston tube stretches out of a cylinder block piston tube penetrating hole of the jack clamping device. A reducing section is arranged at one end of the tension piston tube. On the reducing section, a middle spring spacer sleeve is inserted in an anchor tube, and a release ejector sleeve and a clamping piece ejector sleeve are installed in the anchor tube. Three tool clamping pieces are installed between the release ejector sleeve and the clamping piece ejector sleeve. The tool clamping pieces are provided with outer cone inclined planes. The anchor tube is provided with an inner cone section. When the anchor tube is located on a compression end spring and abuts against a middle spring check ring to compress a middle spring, the tool clamping pieces are located at release clamping positions corresponding to the large diameter of the inner cone section, otherwise the tool clamping pieces are located at an inner shrink clamping position corresponding to the small diameter of an inner cone hole. By the adoption of the prestress tension jack clamping device, steel strands can be simultaneously clamped or released as required, working efficiency is remarkably improved, the steel strands can be clamped or released respectively, and therefore a foundation is established for achieving stress tension of the steel strands of prestress anchor groups.
Description
Technical field
The present invention relates to a kind of prestressed stretch-draw holding device, especially a kind of prestressed stretch-draw jack holding device, belongs to technical field of building construction.
Background technology
The construction projects such as nuclear station, natural fuels acception station, airport building and road and bridge and large span factory building all can't do without adopting tensioning construction technique.Prestressed stretch-draw need penetrate the many steel strand that form group's anchor in duct.Due to steel strand length and relax level difference in duct, using jack to carry out in stretching process, need to clamp as required or unload anchor (being pine oil), to carry out corresponding stress adjusting operation.
The Chinese patent application that traditional steel strand holding device typical structure is 200520128226.6 as application number is disclosed, the piston of its food-through tension jack is arranged between cylinder body and punching cover, the spike that is arranged on piston front portion is connected with piston, and being arranged on the instrument anchor ring in moveable anchor in punching cover is connected with punching cover, and being provided with one, tool clamping piece front portion unloads anchor cover, moveable anchor rear portion is an instrument ring casing, is provided with an elastic body for screwing tool intermediate plate in it.Meanwhile, spike front portion is opened type, and spike is interior for can place the cavity of tension ground tackle, and is provided with action pane on the sidewall of spike.In construction, respectively by controlling push rod (9) or unloading anchor cover (4) and the relative position of instrument anchor ring (7), change the position relationship of tool clamping piece (6) outer cone in instrument anchor ring (7) taper hole, thereby realize the Automatic-clamping of steel strand and automatically unload anchor.Yet there is two large problems in this conventional confguration: the one, the gripping power while clamping depends on the application force of shoring of push rod completely, therefore steel strand is presented to rigidity and clamps, and easily damages steel strand; The 2nd, while unloading anchor, unload anchor cover and can only make the relative moveable anchor ring of tool clamping piece longitudinal travel, cannot guarantee radially getting loose in time and unload anchor of tool clamping piece, be unfavorable for the regulation and control of steel strand prestress.
Summary of the invention
Primary and foremost purpose of the present invention is: the problem existing for above-mentioned prior art, by structural development, proposes a kind of prestressed stretch-draw jack holding device of avoiding steel strand to crush.
Further aim of the present invention is: propose a kind of prestressed stretch-draw jack holding device of timely pine oil steel strand can guarantee to unload anchor time, thereby lay the foundation for realizing the stretch-draw of prestressed group anchorage equal stress.
In order to reach above-mentioned primary and foremost purpose, prestressed stretch-draw jack holding device of the present invention comprises the stretch-draw piston tube (10) of stretching out in jack cylinder body piston tube perforation (10-3); It is characterized in that: one end that described stretch-draw piston tube (10) is stretched out loose anchor slab piston hole has undergauge section (10-1), the upper cover of described undergauge section (10-1) has middle spring (17) and middle spring back-up ring (18); The miner diameter end of described middle spring interstage sleeve (18) is inserted in the anchor tube (9) with inner cone section, the pine that one end contacts with middle spring back-up ring (18) is housed in described anchor tube (9) and opens top cover (15) and be pressed on the intermediate plate top cover (13) being positioned on the inner spring of anchor tube (9) (20); The neighbouring surface of described loose spring top cover (15) and intermediate plate top cover (13) is corresponding with tool clamping piece (11) two ends respectively, at least three tool clamping pieces (11) circumference uniform distribution is between loose spring top cover (15) and intermediate plate top cover (13), described tool clamping piece (11) has outer cone inclined-plane, and described outer cone inclined-plane tilts with the direction near piston rod axis towards middle spring (17) direction; The position of the corresponding tool clamping piece of described anchor tube (9) (11) has the inner cone section matching with outer cone inclined-plane; When anchor tube (9) spring back-up ring (18) and in compression during the position of spring (17) in compression end spring (20) pushing and pressing, the get loose clip position of each tool clamping piece (11) in the large footpath of corresponding inner cone section; When anchor tube (9) is in pine oil end spring (20) and be tending towards middle spring back-up ring (18) and in pine oil during the position of spring (17), the inside contract clip position of each tool clamping piece (11) in corresponding internal taper hole path.
Adopt after the present invention, as long as enter the fluid of cylinder lumen pore, there is certain pressure, can be easily by the shift movement of stretch-draw piston tube, realize as required to the clamping of steel strand or pine oil, and gripping power when tool clamping piece clamps is subject to the slowly-releasing of middle spring and end spring, therefore change the traditional clamping mode to the pure rigidity of steel strand, as long as select middle spring and the end spring of proper stiffness, can avoid damaging steel strand.
In owing to unloading anchor, spring and end spring are simultaneously stressed, the direction relative displacement in order to ensure tool clamping piece towards pine oil steel strand, and the rigidity of middle spring (17) should be greater than the rigidity of end spring (20).
In order to reach further object, the conical surface of one end of the loose spring top cover of vicinity (15) of described tool clamping piece (11) for takeing in towards stretch-draw piston tube (10), the circular conical surface that the surface of described loose spring top cover (15) adjacent tools intermediate plate (11) is the corresponding conical surface.
While unloading anchor, loose spring top cover is when making tool clamping piece longitudinal travel, and also tool clamping piece is outwards supportted in footpath, thereby guarantees the timely pine oil steel strand of tool clamping piece, for realizing the steel strand equal stress stretch-draw of prestressed group anchorage equal stress stretch-draw, lays the foundation.
Further, the two ends of described tool clamping piece (11) are respectively the conical surface takeing in towards stretch-draw piston tube (10), the surface of described loose spring top cover (15) and intermediate plate top cover (13) adjacent tools intermediate plate is respectively the circular conical surface corresponding with tool clamping piece (11) the two ends conical surface, and the tapering of the contiguous intermediate plate top cover (15) of especially described tool clamping piece (11) one end conical surface is greater than the tapering of the contiguous loose spring top cover (15) of tool clamping piece (11) one end conical surface.Like this, be greater than end spring rigidity with middle spring rigidity and combine, in the time of can making tool clamping piece unload anchor, to be radially close to the mode pine oil steel strand of translation, not only unload anchor rapid, and contribute to protect steel strand.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further illustrated.
Fig. 1 is the structural representation of one embodiment of the invention.
Fig. 2 is the local structure schematic diagram of Fig. 1 embodiment in clamped condition.
Fig. 3 is the local structure schematic diagram of Fig. 1 embodiment in the state of getting loose.
The specific embodiment
Embodiment mono-
The prestressed stretch-draw jack holding device basic structure of the present embodiment as shown in Figure 1, the cylinder body of its hydraulic jack holding device is by top body 6, the backhaul tank plate 7 that is connected in top body 6 rear ends and loose anchor slab 8, and the stretch-draw tank plate 5 and front tube 4 formations that are connected in top body 6 front ends.The in-built limited top anchor piston 3 that is positioned at outer end pressure-bearing gasket ring 1 of front tube 4.It is 55 holes with piston tube perforation 10-3(the present embodiment that in the body of top, cylinder lumen pore 10-2 is corresponding respectively that the loose anchor slab 8 of cylinder body and stretch-draw tank plate 5 have one group, also can be by being required to be 37,27,19), in each piston tube perforation 10-3, a stretch-draw piston tube 10 that passes respective cylinder lumen pore 10-2 is housed respectively.These and prior art are basic identical.
As shown in Figure 2 and Figure 3, one end that stretch-draw piston tube 10 is stretched out loose anchor slab piston hole has undergauge section 10-1, and the upper cover of undergauge section 10-1 has middle spring 17 and has the middle spring back-up ring 18 of end outer baffle ring 18-1.The miner diameter end of middle spring interstage sleeve 18 is inserted in the anchor tube 9 with inner cone section, the pine that one end contacts with middle spring back-up ring 18 is housed in anchor tube 9 and opens top cover 15 and be pressed on the intermediate plate top cover 13 being positioned on the inner spring 20 of anchor tube 9.The two ends of tool clamping piece 11 are respectively the conical surface takeing in towards stretch-draw piston tube 10, the surface of pine spring top cover 15 and intermediate plate top cover 13 adjacent tools intermediate plates 11 is respectively the circular conical surface corresponding with the tool clamping piece 11 two ends conical surfaces, and wherein the tapering of tool clamping piece 11 contiguous intermediate plate top cover 15 one end conical surfaces is greater than the tapering of tool clamping piece 11 contiguous loose spring top cover 15 one end conical surfaces.Three tool clamping piece 11 circumference uniform distributions are between loose spring top cover 15 and intermediate plate top cover 13, and tool clamping piece 11 has outer cone inclined-plane, and outer cone inclined-plane tilts with the direction near piston rod axis towards middle spring 17 directions.The rigidity of middle spring 17 (elasticity modulus) is greater than the rigidity of end spring 20, and the position of the corresponding tool clamping piece 11 of anchor tube 9 has the inner cone section matching with outer cone inclined-plane.When anchor tube 9 is in compression end spring 20 and push against end outer baffle ring 18-1 and when the position of spring 17 in compressing (corresponding diagram 1 left piston tube back-up ring 10-4 by loose anchor slab 8 pushing and pressing positions), tool clamping piece 11 as shown in Figure 3, the clip position that gets loose in the large footpath of corresponding inner cone section.When anchor tube 9 is in pine oil end spring 20 and leave end outer baffle ring 18-1 and in pine oil when the position of spring 17 (free position in corresponding diagram 1 upper left corner), tool clamping piece 11 as shown in Figure 2, the clip position that inside contracts in corresponding internal taper hole path.
More specifically describe, one end of the adjacent tools intermediate plate 11 of intermediate plate top cover 13 forms radial expansion back-up ring 13-1, the other end is inserted in end spring 20, and one end of end spring 20 is limited in the interior collar 9-1 of anchor tube 9 ends, and the other end is limited in the radial expansion back-up ring 13-1 of intermediate plate top cover.The piston tube back-up ring 10-4 that is stuck in undergauge step is equipped with at the undergauge place of stretch-draw piston tube 10, is enclosed within the end outer baffle ring 18-1 that middle spring 17 one end in stretch-draw piston tube 10 are limited in middle spring back-up ring 18, and the other end is limited in piston tube back-up ring 10-4.The package assembly of these mutual sleeves makes the prestressed stretch-draw jack holding device axial arrangement of the present embodiment very compact.In addition, the inner cone section of anchor cover 9 forms monolateral trapezoid cross section 9-2, this trapezoid cross section consists of the flat segments at maximum gauge place and the convergent tilting section at two ends, and the end, outer cone inclined-plane of tool clamping piece 11 contiguous inner cone sections also has flat segments, therefore can have the space that keeps pine oil.
And pass after piston tube and anchor tube when steel strand, easily understand, the clip position that gets loose of corresponding tool clamping piece 11, steel strand are not held; And when tool clamping piece 11 is in inside contracting clip position, steel strand are by clamped.Therefore, as long as control the hydraulic pressure that enters cylinder lumen pore 10-2, can be easily by the shift movement of stretch-draw piston tube 10, position-limiting action by loose anchor slab 8 members such as grade, realize the relative displacement of anchor tube 9 and piston tube 10, thereby realize as required clamping or the pine oil of each root steel strand simultaneously, significantly improve work efficiency, and because the tool clamping piece fixing device of every steel strand is independent of one another, so the control that can clamp respectively and get loose, thereby lay a good foundation for realizing the steel strand equal stress stretch-draw of prestressed group anchorage equal stress stretch-draw.
Facts have proved, the prestressed stretch-draw jack holding device advantage of the present embodiment is as follows:
1. compact conformation, can realize as required to the clamping of steel strand or pine oil easily by the shift movement of stretch-draw piston tube, and has avoided the pure rigidity of steel strand to clamp, and can effectively protect steel strand;
2. loose spring top cover is gone back footpath and is outwards supportted tool clamping piece when making tool clamping piece longitudinal travel, thereby guarantees the timely pine oil steel strand of tool clamping piece, makes stretching force flexible adjustment convenient, significantly improves work efficiency;
3. reliable clamping, to be radially close to the mode pine oil steel strand of translation, unloads anchor rapid in the time of can making tool clamping piece unload anchor, contributes to reduce the stress loss of steel bundle, guarantees construction quality.
Claims (10)
1. a prestressed stretch-draw jack holding device, comprises the stretch-draw piston tube (10) of stretching out in jack cylinder body piston tube perforation (10-3); It is characterized in that: one end that described stretch-draw piston tube (10) is stretched out loose anchor slab piston hole has undergauge section (10-1), the upper cover of described undergauge section (10-1) has middle spring (17) and middle spring back-up ring (18); The miner diameter end of described middle spring interstage sleeve (18) is inserted in the anchor tube (9) with inner cone section, the pine that one end contacts with middle spring back-up ring (18) is housed in described anchor tube (9) and opens top cover (15) and be pressed on the intermediate plate top cover (13) being positioned on the inner spring of anchor tube (9) (20); The neighbouring surface of described loose spring top cover (15) and intermediate plate top cover (13) is corresponding with tool clamping piece (11) two ends respectively, at least three tool clamping pieces (11) circumference uniform distribution is between loose spring top cover (15) and intermediate plate top cover (13), described tool clamping piece (11) has outer cone inclined-plane, and described outer cone inclined-plane tilts with the direction near piston rod axis towards middle spring (17) direction; The position of the corresponding tool clamping piece of described anchor tube (9) (11) has the inner cone section matching with outer cone inclined-plane; When anchor tube (9) spring back-up ring (18) and in compression during the position of spring (17) in compression end spring (20) pushing and pressing, the get loose clip position of each tool clamping piece (11) in the large footpath of corresponding inner cone section; When anchor tube (9) is in pine oil end spring (20) and be tending towards middle spring back-up ring (18) and in pine oil during the position of spring (17), the inside contract clip position of each tool clamping piece (11) in corresponding internal taper hole path.
2. prestressed stretch-draw jack holding device according to claim 1, is characterized in that: the rigidity of described middle spring (17) is greater than the rigidity of end spring (20).
3. prestressed stretch-draw jack holding device according to claim 2, it is characterized in that: the conical surface of one end of the loose spring top cover of vicinity (15) of described tool clamping piece (11) for takeing in towards stretch-draw piston tube (10), the circular conical surface that the surface of described loose spring top cover (15) adjacent tools intermediate plate (11) is the corresponding conical surface.
4. prestressed stretch-draw jack holding device according to claim 2, it is characterized in that: the two ends of described tool clamping piece (11) are respectively the conical surface takeing in towards stretch-draw piston tube (10), the surface of described loose spring top cover (15) and intermediate plate top cover (13) adjacent tools intermediate plate is respectively the circular conical surface corresponding with tool clamping piece (11) the two ends conical surface.
5. prestressed stretch-draw jack holding device according to claim 4, is characterized in that: the tapering of the contiguous intermediate plate top cover (15) of described tool clamping piece (11) one end conical surface is greater than the tapering of the contiguous loose spring top cover (15) of tool clamping piece (11) one end conical surface.
6. according to the prestressed stretch-draw jack holding device described in claim 3,4 or 5, it is characterized in that: the in-built limited top anchor piston (3) that is positioned at outer end pressure-bearing gasket ring (1) of described front tube (4).
7. prestressed stretch-draw jack holding device according to claim 6, is characterized in that: the end of described middle spring back-up ring (18) has outer baffle ring (18-1).
8. prestressed stretch-draw jack holding device according to claim 7, is characterized in that: one end of the adjacent tools intermediate plate (11) of described intermediate plate top cover (13) forms radial expansion back-up ring (13-1), and the other end is inserted in end spring (20).
9. prestressed stretch-draw jack holding device according to claim 8, is characterized in that: one end of described end spring (20) is limited in the interior collar (9-1) of anchor tube (9) end, and the other end is limited in the radial expansion back-up ring (13-1) of intermediate plate top cover.
10. prestressed stretch-draw jack holding device according to claim 9, it is characterized in that: the inner cone section of described anchor cover (9) forms monolateral trapezoid cross section (9-2), described trapezoid cross section consists of the flat segments at maximum gauge place and the convergent tilting section at two ends, and the end, outer cone inclined-plane of the contiguous inner cone section of described tool clamping piece (11) also has flat segments.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310465691.8A CN103539034A (en) | 2013-10-08 | 2013-10-08 | Prestress tension jack clamping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310465691.8A CN103539034A (en) | 2013-10-08 | 2013-10-08 | Prestress tension jack clamping device |
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| Publication Number | Publication Date |
|---|---|
| CN103539034A true CN103539034A (en) | 2014-01-29 |
Family
ID=49962963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310465691.8A Pending CN103539034A (en) | 2013-10-08 | 2013-10-08 | Prestress tension jack clamping device |
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| Country | Link |
|---|---|
| CN (1) | CN103539034A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2224194Y (en) * | 1995-06-27 | 1996-04-10 | 郝晋昇 | Group stretch-draw jack |
| CN2235436Y (en) * | 1995-12-18 | 1996-09-18 | 吕文炎 | Multi-function hydraulic jack for pushing or drawing |
| CN2239960Y (en) * | 1995-12-10 | 1996-11-13 | 黄祥 | Hydraulic jack |
| CN2866451Y (en) * | 2005-11-11 | 2007-02-07 | 张雷 | Food-through tension jack |
| CN103466501A (en) * | 2013-09-10 | 2013-12-25 | 中国核工业华兴建设有限公司 | Pre-stress tensioning jack |
| CN203486839U (en) * | 2013-10-08 | 2014-03-19 | 中国核工业华兴建设有限公司 | Prestress tensioning jack clamping device |
-
2013
- 2013-10-08 CN CN201310465691.8A patent/CN103539034A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2224194Y (en) * | 1995-06-27 | 1996-04-10 | 郝晋昇 | Group stretch-draw jack |
| CN2239960Y (en) * | 1995-12-10 | 1996-11-13 | 黄祥 | Hydraulic jack |
| CN2235436Y (en) * | 1995-12-18 | 1996-09-18 | 吕文炎 | Multi-function hydraulic jack for pushing or drawing |
| CN2866451Y (en) * | 2005-11-11 | 2007-02-07 | 张雷 | Food-through tension jack |
| CN103466501A (en) * | 2013-09-10 | 2013-12-25 | 中国核工业华兴建设有限公司 | Pre-stress tensioning jack |
| CN203486839U (en) * | 2013-10-08 | 2014-03-19 | 中国核工业华兴建设有限公司 | Prestress tensioning jack clamping device |
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Application publication date: 20140129 |