CN201095580Y - Stretching jack - Google Patents
Stretching jack Download PDFInfo
- Publication number
- CN201095580Y CN201095580Y CNU200720080856XU CN200720080856U CN201095580Y CN 201095580 Y CN201095580 Y CN 201095580Y CN U200720080856X U CNU200720080856X U CN U200720080856XU CN 200720080856 U CN200720080856 U CN 200720080856U CN 201095580 Y CN201095580 Y CN 201095580Y
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- cylinder body
- piston
- stretch
- piston rod
- observation window
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Abstract
The utility model discloses a tensioning jack which belongs to the jack technical field. The tensioning jack comprises a cylinder body, wherein, one end of the cylinder body that is provided with a support seat is connected with an end cover and the other end of the cylinder body is connected with a gearwheel that is provided with a sleeve by a bearing, a gear shaft is arranged on the support seat, one end of the gear shaft is fixedly connected with a pinion, the gearwheel and the pinion are respectively meshed with an intermediate wheel, in addition, the pinion, the intermediate wheel and the gearwheel that are meshed mutually are arranged in a gear box; an oil nozzle which is communicated with a piston is arranged on the cylinder body and an observation window is arranged on the cylinder body; an inner cavity of the cylinder body is a step hole, a piston rod is arranged in the step hole, the piston is sleeved on the piston rod, the connection part of the pistons positioned at the two sides of the oil nozzle and the cylinder body is provided with a seal ring, the piston is connected with one end of a finger and the other end of the finger is positioned at the observation window of the cylinder body, and the inner cavity of the cylinder body is also provided with a reset spring. The tensioning jack which has the advantages of material and time conservation and high tensioning precision is a special machine that is used for the tensioning of steel bars (PC bars) used by prestressed concrete of ballastless track plates and similar short plates and short beams and the locking of thread anchorages.
Description
Technical field
The utility model relates to a kind of jack, be specifically related to a kind of double acting jack of special use, be mainly used in fragment-free track slab and similar short slab, short beam (≤6 meters) and be applicable to that prestressing tendon is the special-purpose machines and tools of steel bar for prestressed concrete (PC rod iron) stretch-draw, the locking of screw thread ground tackle.
Background technology
Existing stretch-draw jack, tensioned prestressing bar, locking strand tapered anchorage, stretch-draw muscle usable length is long, and the material waste is many, its tension of prestressed tendon system cost height.And the anchor recess hole of stretch-draw system is big, and is stressed unfavorable for thin non-fragment orbit board concrete, and the sealing off and covering anchorage difficulty.
The utility model content
Defective based on prior art, for adapting to the locking of novel prefabricated concrete with steel bar tensing, screw thread ground tackle, the purpose of this utility model is: a kind of novel prefabricated concrete steel bar tensing system that is applicable to is provided, has shortened the usable length of stretch-draw muscle, it is few to take material, the anchor recess hole diminishes, be easy to sealing off and covering anchorage, reduced prestressed stretch-draw system cost, simultaneously compact conformation, easy and simple to handle, but the stretch-draw jack that the stretch-draw precision is high is once finished in stretch-draw, locking.
The technical solution of the utility model is: a kind of stretch-draw jack, comprise cylinder body, the end that cylinder body is equipped with bearing is connected with end cap, the other end is connected with the big gear wheel of band sleeve by bearing, a side that is positioned at big gear wheel is provided with and its ingear idle wheel, one end of bearing connection gear axle band square toes, the gear wheel shaft other end is fixed with and idle wheel ingear miniature gears, and intermeshing miniature gears, idle wheel and big gear wheel are loaded in the gear case, gear case is connected with bolt and cylinder body, cylinder body is provided with the oil nozzle that is communicated with piston, is provided with observation window near end cap one side on the cylinder body; Inner chamber of cylinder block is a stepped hole, be provided with the piston rod coaxial in its hole with cylinder body, and an end of piston rod band square toes stretches out end cap, the piston rod other end is axially arranged with screw, upper cover of piston rod is equipped with the outside and the suitable piston of inner chamber of cylinder block, the piston and the cylinder body connecting bridge that are positioned at the oil nozzle both sides are provided with seal ring, piston is near an end of a side concatenation pointer of cylinder body observation window, the pointer other end is positioned at cylinder body observation window place, inner chamber of cylinder block also is provided with retracing spring, spring one end withstands the end cap inboard, and the spring other end withstands piston end face.
The effect of idle wheel of the present utility model mainly is to make that turning to of big gear wheel and miniature gears is identical, thereby makes piston rod and gear wheel shaft rotate in the same way, is convenient to operation, to avoid producing maloperation.
Observation window described in the utility model can adopt directly on cylinder body corresponding pointer position to have the structure of groove vertically, also can be the sealing window that corresponding pointer position upper edge is axially arranged with visual pointer on cylinder body.
Observation window on the cylinder body described in the utility model is axially arranged with the scale of measuring the stretching extension amount along cylinder body.Because pointer is fixed on the piston, during stretch-draw, piston and rod iron are synchronized with the movement, and therefore, the amount of movement of piston is exactly the stretching extension amount of rod iron.
Be set with the load cover on the sleeve of big gear wheel described in the utility model, and the outer shroud of the interior ring of load cover and gear case cover is by being threaded.The load cover is the stress point of jack antagonistic force, directly bears the antagonistic force with respect to piston that comes from oil pressure, cylinder body, gear case transmission.
Hand-held rod is equipped with in the upper end of gear case described in the utility model and bearing, so that carry.
Piston described in the utility model and cylinder body connecting bridge are being provided with dust ring away from a section of seal ring, to prevent that dust from entering oil pocket, the oil pocket here refers to the space between cylinder body and the piston, and this space is between seal ring and the part that is communicated with oil nozzle.
Principle of work of the present utility model is: during the supporting use of this jack and oil pump, oil nozzle on the top is connected with the oil pump control cock with high pressure fuel pipe, with power-operated wrench piston rod front end negative thread being spun on steel bar for prestressed concrete stretches out on the ground tackle end screw thread, and be connected firmly, the load cover is close to fragment-free track slab and similar short slab, short beam cement concrete end face, fluid enters the jack oil nozzle through oil pump, promoting piston moves backward, drive piston rod and carry out stretch-draw, after reaching design power value, closed control valve, make it to hold lotus, with power-operated wrench turn gear wheel shaft, driven gear and piston rod are tightened the screw thread ground tackle on anchor plate, reach the usefulness of anchoring.
Installation of the present utility model and method of operation:
1, ground tackle is installed: check that reserving the steel bar for prestressed concrete external diameter screw thread that stretches out anchor plate in the hole slot and termination has or not and damage and tooth is buckled distortion, and remove foreign material such as the cement concrete stick to thread surface and silt, with screw thread ground tackle alignment hole center, be threaded to the backing plate end face and screw, measure the beam slab end face to the anchor plate end face distance with depth gauge, this distance should be controlled in the 55-60mm scope, measure the steel bar for prestressed concrete thread end simultaneously and grow the ground tackle end face distance, this distance should be 40-50mm.
2, jack is installed: the jack front end is inserted plate reserve in the hole slot, align the steel bar for prestressed concrete center, outer six sides of corresponding ground tackle, jack load cover is affixed on the cement concrete end face, insert the piston rod square toes with power-operated wrench, start spanner (clickwise), be connected firmly the screw and the steel bar for prestressed concrete outside thread of piston rod (observe the piston rod rear end apart from rear end, top distance, guarantee the effective length that is threaded).
3, stretch-draw: after checking whether high pressure fuel pipe two ends and jack and oil pump are connected reliably, start oil pump, fluid enters jack from oil nozzle, piston moves backward, carry out stretch-draw, observe the pen travel of oil pressure indicator and jack cylinder body observation window simultaneously, when oil pressure and elongation all reach the engineering stress value, make oil pump hold lotus, with the square toes of power-operated wrench front end insertion gear wheel shaft, parallel centering is started spanner, clockwise rotate gear wheel shaft, the screw thread ground tackle is locked on the anchor plate.Outward winding oil pump inlet valve and unloader valve, fluid flows in the pump next time in action of the spring, and oil pressure indicator after getting back to " 0 " position takes out power-operated wrench, press reverse key, insert the piston rod square toes, observe the moving hand of cylinder body observation window, start power-operated wrench (left-hand revolution), make piston rod slowly withdraw from steel bar for prestressed concrete front end screw thread, ground tackle is locked on anchor plate, withdraws from jack, and stretch-draw is finished.Method can be carried out stretch-draw next time like this.
The beneficial effects of the utility model are: compact conformation, good airproof performance, volume are little, easy and simple to handle, but stretch-draw, locking are once finished; The elongation that can show rod iron by pointer, the steel bar tensing usable length is short, and steel bar tensing locking back neck-in is little, and stress loss is little; Material-saving, save time, stretch-draw precision height, behind the steel bar for prestressed concrete tensioning fixation retraction less than 1mm, stress loss is little.
Below in conjunction with the drawings and specific embodiments the utility model is further specified.
Description of drawings
Fig. 1 is a vertical profile structural representation of the present utility model;
Fig. 2 is that the A of Fig. 1 is to view;
Fig. 3 is that the B of Fig. 1 is to view;
Wherein, Reference numeral is:
1 is the load cover, and 2 is gear case, and 3 is miniature gears, and 4 is oil nozzle, 5 is piston, and 6 is cylinder body, and 6-1 is the cylinder body observation window, and 7 is gear wheel shaft, 8 is hand-held rod, and 9 is pointer, and 10 is bearing, and 11 is piston rod, 11-1 is the square toes end of piston rod, and 11-2 is the screw of piston rod, and 12 is spring, 13 is big gear wheel, and 14 is end cap, and 15 is dust ring, 16 is seal ring, and 17 is interior hexagonal attaching screw, and 18 is idle wheel.
The specific embodiment
Preferred embodiment
As Figure 1-3, a kind of stretch-draw jack, comprise cylinder body 6, the end that cylinder body 6 is equipped with bearing 10 is connected with end cap 14, be convenient to install the parts of inner chamber of cylinder block, cylinder body 6 other ends are connected with big gear wheel 13 by bearing, big gear wheel 13 1 ends have sleeve, a side that is positioned at big gear wheel 13 is provided with and its ingear idle wheel 18, one end of gear wheel shaft 7 band square toes is installed on the bearing 10, the other end of gear wheel shaft 7 is fixed with and idle wheel 18 ingear miniature gearss 3, and intermeshing miniature gears 3, idle wheel 18 and big gear wheel 13 are loaded in the gear case 2, and this gear case 2 is that left and right sides casing is formed by connecting by interior hexagonal attaching screw 17, are set with load cover 1 on the sleeve of big gear wheel 13, and the outer shroud that the interior ring of load cover 1 and gear case 2 cover is by being threaded, gear case 2 usefulness bolts and cylinder body are connected, and hand-held rod 8 is equipped with in the upper end of gear case 2 and bearing 10, is easy to carry; Cylinder body 6 is provided with the oil nozzle 4 that is communicated with piston 5; Be provided with observation window 6-1 near end cap 14 1 sides on the cylinder body 6, observation window 6-1 is axially arranged with the scale of measuring the stretching extension amount along cylinder body.
The inner chamber of cylinder body 6 is a stepped hole, be provided with the piston rod 11 coaxial in its hole with cylinder body 6, and an end of piston rod 11 stretches out end cap 14, the end that piston rod 11 stretches out end cap 14 is square toes 11-1, the other end of piston rod 11 is axially arranged with screw 11-2, be set with piston 5 on the piston rod 11, the inner chamber of the outside of piston 5 and cylinder body 6 is suitable, the inner chamber stepped hole of cylinder body 6 mainly is to be used for to piston 5 near the spacing usefulness of gear case one end, the piston 5 that is positioned at oil nozzle 4 both sides is provided with seal ring 16 with cylinder body 6 connecting bridges, and piston 5 and cylinder body 6 connecting bridges are being provided with dust ring 15 away from a section of seal ring 16, when oil nozzle 4 by high pressure fuel pipe with after the oil pump control cock is connected, high pressure oil enters oil nozzle, and then promotes piston and move, and drives piston rod and carries out stretch-draw;
Piston 5 is near an end of the side concatenation pointer 9 of cylinder body observation window 6-1, and pointer 9 other ends are positioned at cylinder body observation window 6-1 place, makes pointer 9 and piston 5 same moved further; Inner chamber of cylinder block also is provided with retracing spring 12, and spring 12 1 ends withstand end cap 14 inboards, and spring 12 other ends withstand the end face of piston 5, and after oil pump inlet valve and unloader valve were opened, fluid flowed in the oil pump next time in the effect of spring.
Claims (5)
1, a kind of stretch-draw jack, comprise cylinder body (6), it is characterized in that: the end that cylinder body (6) is equipped with bearing (10) is connected with end cap (14), the other end is connected with the big gear wheel (13) of band sleeve by bearing, a side that is positioned at big gear wheel (13) is provided with and its ingear idle wheel (18), one end of bearing (10) connection gear axle (7) band square toes, gear wheel shaft (7) other end is fixed with and idle wheel (18) ingear miniature gears (3), and intermeshing miniature gears (3), idle wheel (18) and big gear wheel (13) are loaded in the gear case (2), and gear case is connected with bolt and cylinder body;
Cylinder body (6) is provided with the oil nozzle (4) that is communicated with piston (5), and cylinder body (6) is gone up near end cap (14) one sides and is provided with observation window (6-1);
Cylinder body (6) inner chamber is a stepped hole, be provided with the piston rod (11) coaxial in its hole with cylinder body (6), and an end of piston rod (11) band square toes (11-1) stretches out end cap (14), piston rod (11) other end is axially arranged with screw (11-2), be set with the outside and the suitable piston (5) of cylinder body (6) inner chamber on the piston rod (11), the piston (5) that is positioned at oil nozzle (4) both sides is provided with seal ring (16) with cylinder body (6) connecting bridge, piston (5) is near an end of a side concatenation pointer (9) of cylinder body observation window (6-1), pointer (9) other end is positioned at cylinder body observation window (6-1) and locates, inner chamber of cylinder block also is provided with retracing spring (12), spring (12) one ends withstand end cap (14) inboard, and spring (12) other end withstands the end face of piston (5).
2, stretch-draw jack according to claim 1 is characterized in that: the observation window (6-1) on the described cylinder body (6) is axially arranged with the scale of measuring the stretching extension amount along cylinder body.
3, stretch-draw jack according to claim 1 and 2 is characterized in that: be set with load cover (1) on the sleeve of described big gear wheel (13), and the outer shroud of the interior ring of load cover (1) and gear case (2) lid is by being threaded.
4, stretch-draw jack according to claim 1 and 2 is characterized in that: hand-held rod (8) is equipped with in the upper end of described gear case (2) and bearing (10).
5, stretch-draw jack according to claim 1 and 2 is characterized in that: described piston (5) and cylinder body (6) connecting bridge are being provided with dust ring (15) away from a section of seal ring (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720080856XU CN201095580Y (en) | 2007-08-30 | 2007-08-30 | Stretching jack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200720080856XU CN201095580Y (en) | 2007-08-30 | 2007-08-30 | Stretching jack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201095580Y true CN201095580Y (en) | 2008-08-06 |
Family
ID=39922637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200720080856XU Expired - Lifetime CN201095580Y (en) | 2007-08-30 | 2007-08-30 | Stretching jack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201095580Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102692171A (en) * | 2012-06-15 | 2012-09-26 | 中铁十局集团有限公司 | Tensioning elongation value measuring device for prestressed tensioning construction |
| CN102853735A (en) * | 2012-08-29 | 2013-01-02 | 中铁十局集团有限公司 | Clamping sheet exposing value measuring device of front clamping type jack |
| CN110094381A (en) * | 2019-04-24 | 2019-08-06 | 中冶建筑研究总院有限公司 | A kind of multi-cylinder integral type prestressed stretch-draw jack side by side |
-
2007
- 2007-08-30 CN CNU200720080856XU patent/CN201095580Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102692171A (en) * | 2012-06-15 | 2012-09-26 | 中铁十局集团有限公司 | Tensioning elongation value measuring device for prestressed tensioning construction |
| CN102692171B (en) * | 2012-06-15 | 2014-06-11 | 中铁十局集团有限公司 | Tensioning elongation value measuring device for prestressed tensioning construction |
| CN102853735A (en) * | 2012-08-29 | 2013-01-02 | 中铁十局集团有限公司 | Clamping sheet exposing value measuring device of front clamping type jack |
| CN102853735B (en) * | 2012-08-29 | 2015-04-01 | 中铁十局集团有限公司 | Clamping sheet exposing value measuring device of front clamping type jack |
| CN110094381A (en) * | 2019-04-24 | 2019-08-06 | 中冶建筑研究总院有限公司 | A kind of multi-cylinder integral type prestressed stretch-draw jack side by side |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20070830 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |