Quick-change slips hydraulic rubber cylinder chuck
The present invention relates to a kind of gripping mechanism, is the quick-change slips hydraulic rubber cylinder chuck that adapts on the all-hydraulic power head rig specifically, links to each other with the unit head output shaft of rig usually, is used to tighten kelly, and makes the transmission of torque of unit head give drilling tool in the hole.
Hydraulic pressure packing element chuck in the past all needs oild chuck integral body is taken apart when changing slips, re-assemblies; As a rule, also all change packing element simultaneously, in the application life that this has just shortened packing element artificially, increased cost of production.
Chuck is as one of main executing agency of all-hydraulic drill, and when the basic demand of its proposition was the chucking drilling rod, action was wanted rapidly, and enough clamping forces are arranged, and guarantee not produce relative slip between captured drilling rod and the slips.Specifically, it is simple that structure is wanted, and clamping force is big, and dynamic moment of inertia is little; When rig has the interlock function, require the opening and closing movement of chuck and clamper to coordinate, to guarantee all the time that promptly one of them clamps drilling rod after, another mechanism unclamps again.In addition, opening force is low when unclamping, so that reduce the size of spring.When changing the slips of different specification size, make things convenient for easily the packing element long service life.
Summary of the invention
The invention provides a kind of when changing the slips of different specification size, quick, simple, practical quick-change slips hydraulic rubber cylinder chuck.
For achieving the above object, its technical scheme is:
Quick-change slips hydraulic rubber cylinder chuck comprises passing and draws dish, bonnet, chuck body, packing element, Supporting ring, slips, end pressure ring, torque-transmission disk, protecgulum, spring and backing plate; Described biography draws dish, bonnet, chuck body, packing element, Supporting ring, end pressure ring, protecgulum and backing plate to form monolateral pliable pressure cavity volume; Its special character is: the ring-shaped inner part at monolateral pliable pressure cavity volume is provided with slip spider, forms the biography clamping force element that is made of slip spider, slips, spring, and the axial end of described slip spider is positioned on the protecgulum aperture edge; The axial arranged outside torque-transmission disk of slips in the described slip spider, the axial arranged outside end gland of torque-transmission disk; For the male and female draw-in groove is slidingly connected, be connected for latch that can transmitting torque between torque-transmission disk and bonnet and the protecgulum between described slips and the torque-transmission disk.
For the male and female draw-in groove is connected, bowl and slips inwardly slides under the constraint of torque-transmission disk (12) draw-in groove between above-mentioned slips and the slip spider.
Above-mentioned slips is connected with torque-transmission disk male and female draw-in groove, and the axial fit clearance of the flexibility that improves the slips slip is set between the two.
Slips in the above-mentioned slip spider is the slips of different specification size.
The present invention is with respect to prior art, and its advantage is as follows:
The present invention has set up slips and slip spider and end gland on the basis of hydraulic pressure packing element chuck.At the slips of changing different specification size, only need lay down the end gland, slips can be extracted out in slip spider, need not the whole decomposition of oild chuck is realized the purpose of quick change; It has hydraulic pressure packing element chuck and clamps the safe and reliable and little advantage of dynamic moment of inertia;
Appearance and size of the present invention is little, and opening pressure is low, and the pressure that helps between each branch road of hydraulic system is coordinated, and has also improved the efficient of hydraulic system; In the hydraulic system that the interlock function is arranged, cooperate, but safety action is coordinated with hydraulic gripper.
Description of drawings
Fig. 1 is the structural representation of existing hydraulic pressure packing element chuck;
Fig. 2 is a structural representation one of the present invention;
Fig. 3 is a structural representation two of the present invention.
1-has strong market potential, 2-passes and draws dish, 3-stud, 4-nut, 5-bonnet, 6-slip spider, 7-chuck body, 8-packing element, 9-Supporting ring, 10-slips, 11-end pressure ring, 12-torque-transmission disk, 13-protecgulum, 14-spring, the short pin of 15-, 16-backing plate, 17-to hold gland.
The specific embodiment
Referring to Fig. 1, Fig. 2, the present invention is on the basis of hydraulic pressure packing element chuck, has set up a slip spider 6 and an end gland 17, when changing the slips of different specification size, lays down end gland 17, extracts old slips out, changes new slips, loads onto end gland 17 and gets final product.
Referring to Fig. 2, Fig. 3, quick-change slips hydraulic rubber cylinder chuck of the present invention comprises and has strong market potential 1, passes parts such as drawing dish 2, stud 3, nut 4, bonnet 5, slip spider 6, chuck body 7, packing element 8, Supporting ring 9, slips 10, end pressure ring 11, torque-transmission disk 12, protecgulum 13, spring 14, short pin 15, backing plate 16 and end gland 17 and form.Biography draws dish 2, bonnet 5, chuck body 7, packing element 8, Supporting ring 9, end pressure ring 11, protecgulum 13 and backing plate 16 to form monolateral pliable pressure cavity volume; Portion is provided with slip spider 6, slips 10, spring 14 composition biography card power elements within it; Slips 10 is slidingly connected with torque-transmission disk 12 usefulness male and female draw-in grooves, and torque-transmission disk 12 is connected transmitting torque with bonnet 5 respectively with protecgulum 13 with latch.The aperture of protecgulum 13 is between the external diameter and internal diameter of slip spider 6.Slips 10 is connected with slip spider 6 usefulness male and female draw-in grooves.When changing the slips of different specification size, lay down end gland 13, extract old slips out, change new slips, load onto end gland 13 and get final product.
Operating principle of the present invention is: when pressure oil entered monolateral flexible annular pressure chamber, under the effect of pressure oil, slip spider 6 and slips 10 inwardly slided under the constraint of torque-transmission disk 12 draw-in grooves, the chucking drilling rod; After pressure discharged, under the effect of spring 14, slip spider 6 and slips 10 unclamped drilling rod to moving in the other direction.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, every foundation technical spirit of the present invention all still belongs in the scope of technical solution of the present invention any simple modification, equivalent variations and modification that above embodiment did.