CN113006725B - Rolling shaping mechanism and sleeve shaping tool - Google Patents
Rolling shaping mechanism and sleeve shaping tool Download PDFInfo
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- CN113006725B CN113006725B CN202110415699.8A CN202110415699A CN113006725B CN 113006725 B CN113006725 B CN 113006725B CN 202110415699 A CN202110415699 A CN 202110415699A CN 113006725 B CN113006725 B CN 113006725B
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- 238000007493 shaping process Methods 0.000 title claims abstract description 108
- 238000005096 rolling process Methods 0.000 title claims abstract description 37
- 230000007246 mechanism Effects 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 claims abstract description 9
- 230000008859 change Effects 0.000 claims abstract description 6
- 230000005540 biological transmission Effects 0.000 claims description 65
- 230000033001 locomotion Effects 0.000 claims description 49
- 239000012530 fluid Substances 0.000 claims description 22
- 238000007789 sealing Methods 0.000 claims description 13
- 238000001125 extrusion Methods 0.000 claims description 11
- 238000004891 communication Methods 0.000 claims description 10
- 230000009471 action Effects 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- 238000009987 spinning Methods 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 4
- 239000011159 matrix material Substances 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 239000000758 substrate Substances 0.000 claims description 2
- 230000008602 contraction Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 18
- 230000000737 periodic effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000000399 orthopedic effect Effects 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 230000000750 progressive effect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000008093 supporting effect Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B29/00—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
- E21B29/10—Reconditioning of well casings, e.g. straightening
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Abstract
The invention discloses a rolling shaping mechanism and a sleeve shaping tool, wherein the rolling shaping mechanism comprises a shaping ball (13) and a moving grooved rail (63), and the shaping ball (13) radially stretches and retracts while moving along the moving grooved rail (63) so as to apply radial shaping pressure to a deformed part of a sleeve; the method is characterized in that: the basal body of the moving groove rail (63) is a cone so that the radial expansion length of the shaping ball (13) is changed in multiple stages along the axial direction; the multistage change is used for performing multistage shaping on the sleeve; the sleeve shaping tool comprises the rolling shaping mechanism; the problem that the single-time well descending reshaping amount of the existing reshaping device is small, namely only single-stage reshaping can be carried out is solved.
Description
Technical Field
The invention relates to a reshaping tool, in particular to a repairing tool for reshaping balls aiming at deformation of a sleeve.
Background
The swage of patent number ZL202011204145.5 presents several problems in actual use. Wherein, the plastic subassembly is cylindrical because its whole appearance structure, so carries out the plastic volume of plastic to the sleeve pipe of corresponding pipe diameter limited, if just radially warp great sleeve pipe, because the single plastic volume is little, so, when carrying out the operation, need frequently to play the shaper of tubular column in order to change different specifications, increase the activity duration, promote operating cost.
In addition, the outer sleeve for rotary shaping needs to realize rotary motion by means of a front-mounted two-way thrust bearing, and during actual operation, particle impurities are easily mixed in the structure of the two-way thrust bearing, so that the bearing is abraded in an accelerated manner, and even the outer sleeve for rotary shaping cannot normally work when directly meeting a clamp, and the integral progress of shaping and repairing is influenced.
Still, rely on the lead screw to drive the ball motion during the plastic, it is rotatory to drive the overcoat in the time of the ball motion, and this kind of motion form can aggravate the burden as the ball to its wearing and tearing speed accelerates, increase change cycle and maintenance cost, and the driving effect of shaper ball when meeting the card in the pit also can make the spacing hole on the overcoat warp, makes the ball jump out, influences transmission efficiency.
The reversing valve in the piston cylinder of the reciprocating mechanism only enables the valve body not to be separated from the cylinder body in the axial direction, so that the piston can generate axial movement under the action of fluid pressure before contacting with the reversing valve, and does not move according to the principle explained in the document, and the fluid pressure in the piston cavity is caused to flow out too early, so that the transmission power is insufficient. The unconstrained property of the axial movement of the reversing valve determines that the initial position of the reversing valve needs to be accurately positioned during operation;
in addition, the piston cylinder structure adopts two piston cavities with different sizes and corresponding pistons, the two piston cavities are separated by a partition plate, a reversing valve is required to be installed on the partition plate, and the difficulty of disassembly and assembly is improved due to the structure.
Disclosure of Invention
In view of the above, the invention provides a rolling shaping mechanism and a casing shaping tool, which solve the problem that the existing shaper has small shaping amount in a single-time well descending, i.e. can only perform single-stage shaping.
On the first aspect, the rolling shaping mechanism comprises a shaping ball and a moving groove rail, wherein the shaping ball radially extends and retracts along the moving groove rail to apply radial shaping pressure to a deformed part of the sleeve; the method is characterized in that:
the base body of the moving groove rail is a cone so that the radial expansion length of the shaping ball is changed in multiple stages along the axial direction;
the multi-stage change is used for performing multi-stage shaping on the sleeve.
Further, the depth and/or width of the moving groove rail are/is periodically changed so that the shaping ball synchronously rolls and/or spins while radially extending and contracting;
the rolling and/or spinning action of the profiled balls is used on the deformed portion to generate a rolling force that restores its deformation.
Further, the moving groove rail is a plurality of circles of grooves which are arranged along the axial direction of the base body.
Further, the substrate includes:
a jacket;
the outer sleeve is a cone-shaped cylinder, and a plurality of limiting holes are formed in the wall of the outer sleeve;
the limiting hole is used as a track for the shaping ball to stretch and retract in the radial direction, and the shaping ball is limited on the inner side of the outer sleeve.
Furthermore, the arrangement mode of the limiting holes on the outer sleeve corresponds to the grooves.
Further, the grooves are arranged at equal intervals along the axial direction of the base body;
the limiting holes are arranged on the outer sleeve in an axial and circumferential equidistant mode, and adjacent limiting holes are arranged in a staggered mode.
Further, the matrix further comprises an expansion body;
the moving groove rail is arranged on the outer wall of the extrusion body;
the extruding and expanding body rotates to drive the shaping ball to stretch and contract along the radial direction of the moving grooved rail.
Furthermore, the extruding and expanding body and the guide screw form a ball screw pair;
the guide screw rod moves linearly to drive the extrusion body to rotate.
Furthermore, the inner wall of the extrusion body is provided with a first spiral grooved rail, and a loop channel is arranged in the wall;
a second spiral groove rail is arranged on the surface of the guide screw rod;
the first spiral groove track, the loop channel and the second spiral groove track form a motion loop;
and a transmission ball is arranged in the motion loop so as to convert the linear motion of the guide screw into the rotary motion of the extrusion body.
Furthermore, the upper end and the lower end of the extrusion body are respectively provided with a sealing ring;
the device is used for preventing impurities in the shaping process from entering the motion circuit to wear the transmission balls.
In a second aspect, the casing reshaping tool comprises:
the roll truing mechanism of the first aspect.
Further, the rolling shaping mechanism is connected with a self-circulation type piston cylinder;
the self-circulation type piston cylinder automatically reciprocates to drive the shaping ball to move along the moving groove rail.
Further, the self-circulating piston cylinder comprises a piston rod;
the piston rod is used for connecting the base body to move so as to enable the shaping ball to move along the moving groove rail.
Further, the lower end of the self-circulation type piston cylinder is fixedly connected with an outer sleeve;
during the shaping process, the outer sleeve is static relative to the moving groove rail.
The invention has the following beneficial effects:
the patent adopts a spiral progressive shaping component, and a spiral shaping screw rod in the spiral progressive shaping component is of a straight cylinder type, and a spiral depth groove is formed in the spiral shaping screw rod. The spiral groove arrangement is only suitable for single-stage shaping, and if the conical structure based on multi-stage reducing shaping is changed into the conical structure based on multi-stage reducing shaping, the ball cannot move radially due to the axial movement of the rotary shaping screw due to the position relation of the ball when moving according to the original movement form, so that the conical spiral shaping screw cannot move axially relative to the conical rotary shaping shell; meanwhile, the ball moves along the spiral depth groove, the spiral shaping screw rod cannot rotate axially, the ball cannot move in a radial telescopic mode, and the shaper cannot work directly.
The rolling shaping mechanism has a conical structure as a base body, and simultaneously changes a spiral track moving as a shaping ball into a plurality of circles of moving groove tracks arranged along the axial direction, so that the relative rotation between an extrusion expansion body of the conical structure and an outer sleeve of the conical structure can be realized, the shaping ball is subjected to radial stretching and/or rolling and/or spinning movement, and the movement results act on a deformation part to generate rolling pressure and radial shaping pressure for recovering the deformation of the shaping ball, so that the purpose of shaping a deformed sleeve is achieved; in addition, because the base body of the movement groove rail is a cone, the radial expansion length of the shaping ball can be changed in multiple stages along the axial direction, and the multiple stages of changes can correspond to the sleeve with larger radial deformation so as to achieve the purpose of multi-stage shaping.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:
FIG. 1 is a schematic structural view of a casing conforming tool in accordance with an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a self-circulating piston cylinder according to an embodiment of the invention;
FIG. 3 is a schematic structural view of a first end cap according to an embodiment of the invention;
FIG. 4 is a schematic structural view of a cylinder according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a reversing element according to an embodiment of the invention;
FIG. 6 is a schematic structural view of a piston assembly in accordance with an embodiment of the present invention;
FIG. 7 is a schematic structural view of a sliding sleeve according to an embodiment of the present invention;
FIG. 8 is a schematic structural view of a second end cap according to an embodiment of the invention;
FIG. 9a is a diagram illustrating an initial operating state of a self-circulating piston cylinder according to an embodiment of the present invention;
FIG. 9b is a view of the piston cylinder piston operating in a downward stroke of the self-circulating piston cylinder of the embodiment of the present invention;
FIG. 9c is a diagram of the working state of the piston cylinder piston in the self-circulation type piston cylinder from the downward direction to the upward direction according to the embodiment of the invention;
FIG. 9d is a diagram illustrating the upward working status of the piston of the self-circulation piston cylinder according to the embodiment of the invention;
FIG. 9e is a diagram illustrating the operation of the self-circulating piston cylinder with pistons traveling up and down from the first position to the second position in accordance with an embodiment of the present invention;
FIG. 10 is a schematic structural diagram of a roll-shaping mechanism according to an embodiment of the present invention;
FIG. 11 is a block diagram of a guide sleeve according to an embodiment of the present invention;
FIG. 12 is a block diagram of a orthopedic outer shell according to an embodiment of the present invention;
FIG. 13 is a block diagram of an upper end cap of an inflatable body in accordance with an embodiment of the present invention;
FIG. 14 is a structural view of a seal ring according to the embodiment of the invention;
FIG. 15 is a block diagram of an inflatable body according to an embodiment of the invention;
FIG. 16 is a block diagram of the lower end cap of the inflatable body in accordance with an embodiment of the present invention;
FIG. 17 is a block diagram of a lead screw in accordance with an embodiment of the present invention;
fig. 18 is a block diagram of a plug according to an embodiment of the invention.
Detailed Description
The present invention will be described below based on examples, but it should be noted that the present invention is not limited to these examples. In the following detailed description of the present invention, certain specific details are set forth. However, the present invention may be fully understood by those skilled in the art for those parts not described in detail.
Furthermore, those skilled in the art will appreciate that the drawings are provided solely for the purposes of illustrating the invention, features and advantages thereof, and are not necessarily drawn to scale.
Also, unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, it is meant by "including but not limited to".
The casing pipe shaping tool of the present embodiment includes, as shown in fig. 1, a self-circulation type piston cylinder 1 and a roll shaping mechanism 2.
FIG. 2 is a schematic structural diagram of a self-circulating piston cylinder according to an embodiment of the invention; FIGS. 9a-9e are views illustrating the operation of a self-circulating piston cylinder according to an embodiment of the present invention; the self-circulation piston cylinder of the embodiment comprises a cylinder body assembly, a piston assembly 7 and a reversing mechanism, wherein the piston assembly 7 divides the cylinder body assembly into a first piston cavity 51 and a second piston cavity 52, and the cylinder body assembly comprises a first end cover 3, a cylinder body 5 and a second end cover 10; the reversing mechanism comprises a pressure change-over switch and a flow direction change-over switch, and the flow direction change-over switch is used for alternately introducing the continuous pressure into the first piston cavity 51 or the second piston cavity 52; the pressure switch functions to reduce the pressure not introduced into the continuous pressure chamber to form an alternate pressure difference between the first piston chamber 51 and the second piston chamber 52, by which the piston assembly 7 is driven to automatically reciprocate.
The pressure change-over switch comprises a reversing piece 6 and a reversing pressure transmission channel; the flow direction change-over switch is connected with the piston assembly 7 and comprises a sliding sleeve 8 and a spring 9.
Specifically, the component composition, the component structure and the connection relationship of the self-circulation piston cylinder according to the present embodiment will be described in detail with reference to the accompanying drawings:
FIG. 3 is a schematic view of a first end cap according to an embodiment of the invention; in fig. 3, the first end cap 3 is provided with a central hole at the center and a connecting thread at the upper end, through which other devices can be connected; the annular end surface of the first end cover 3 is provided with 4 screw holes 23, and the first end cover 3 is connected with the upper end of the cylinder body 5 through the screw holes 23 and the connecting bolts 4; a first central annular bulge 25 and a first edge annular bulge 24 extend from the lower end of the first end cover 3, wherein the first central annular bulge 25 is embedded in the cylinder 5 and serves as an upper limit of the piston assembly 7 arranged in the cylinder 5, and the first central annular bulge 25 can enclose a chamber; the first peripheral annular projection 24 is located outside the first central annular projection 25, and a first connecting channel 26 is provided between the first peripheral annular projection 24 and the first central annular projection 25, and the upper connecting channel 11 is used for allowing the fluid entering the chamber of the first central annular projection 25 to enter the chamber of the first peripheral annular projection 24 through the first connecting channel 26.
FIG. 8 is a schematic structural view of a second end cap according to an embodiment of the invention; in fig. 8, the second end cap 10 has screw holes on its surface, and the screw holes on the second end cap 10 correspond to the screw holes 23 on the lower end surface of the cylinder 5 for connecting with the cylinder 5 by bolts. The upper surface of the second end cover 10 is provided with a second central annular bulge 48 and a second edge annular bulge 47, the second central annular bulge 48 is used as the lower limit of the piston assembly 7 arranged in the cylinder 5, and the second central annular bulge 48 can enclose a cavity; a second communication passage 49 for mutual communication is provided between the second central annular projection 48 and the second peripheral annular projection 47. The lower surface of the second end cap 10 extends with a circular tubular structure 50, and the outer surface of the circular tubular structure 50 is provided with threads for connecting with the rolling shaping mechanism 2.
FIG. 4 is a schematic structural view of a cylinder according to an embodiment of the present invention; in fig. 4, the cylinder 5 is a sleeve-shaped structure, and the end surfaces of the upper and lower ends of the cylinder are respectively provided with 4 screw holes 23 for connecting the cylinder 5 with the first end cap 3 and the second end cap 10 by bolts. An axial channel 27 is provided through the side wall of the cylinder 5 on one side, and access cavities 28 are provided at both ends of the axial channel 27, the access cavities 28 being for respectively receiving the first edge annular protrusion 24 and the second edge annular protrusion 47. Pressure transfer holes 29, namely a first pressure transfer hole and a second pressure transfer hole, are respectively arranged between the two access cavities 28 at the two ends of the axial channel 27 and the inner cavity of the cylinder body 5. The middle of the axial channel 27 is opened with a relief hole 30 communicating with the outside of the cylinder. In this way, the cylinder 5 can communicate with the outside of the cylinder through the axial passage 27, the first or second pressure transfer hole, and the relief hole 30.
Referring to fig. 2, the cylinder body 5, the first end cap 3 and the second end cap 10 are assembled and connected to form a cylinder body assembly through bolts, at this time, the first edge annular protrusion 24 of the first end cap 3 and the second edge annular protrusion 47 of the second end cap 10 are inserted into the access cavities 28 at the upper and lower ends of the cylinder body 5, the axial channel 27 at one side of the cylinder body 5 and the first edge annular protrusion 24 and the second edge annular protrusion 47 at the two ends of the channel form an accommodating chamber together, the accommodating chamber and the first communicating channel 26 on the first end cap 3 and the second communicating channel 49 on the second end cap 10 form a reversing pressure transmitting channel, and the two ends of the reversing pressure transmitting channel are both communicated with the inner cavity of the cylinder body 5.
FIG. 6 is a schematic structural view of a piston assembly in accordance with an embodiment of the present invention; in fig. 6, the piston assembly 7 includes a piston rod 36 and a piston 38, and the piston 38 is fixed on the piston rod 36 or is integrally formed with the piston rod 36. Wherein, the side of the piston 38 is provided with a rectangular groove 39, and the rectangular groove 39 is internally provided with a sealing ring. The piston rod 36 is divided into a hollow section and a solid section 40, and the length of the hollow section is greater than that of the solid section. The piston 38 is fixed on the hollow section of the piston rod 36, the hollow section of the piston rod 36 is provided with a first pressure input hole 37 and a second pressure input hole 26, and the first pressure input hole 37 and the second pressure input hole 26 are respectively positioned above and below the piston 38. A pressure relief channel 42 between the inside of the hollow section and the outside of the piston rod 36 is arranged in the solid section 40 of the piston rod 36; the lower end of the piston rod 36 is provided with an external thread structure 28, and the piston rod 36 is connected with the rolling shaping mechanism through the external thread structure 43.
Referring to fig. 2 and 9b, the piston assembly 7 is installed in a cylinder assembly, wherein the piston 38 divides the interior of the cylinder 5 into a first piston chamber 51 and a second piston chamber 52, the first pressure transmission hole 37, the first communication channel 26 and the first pressure transmission hole correspond to the first piston chamber 51, the second pressure transmission hole 26, the second communication channel 49 and the second pressure transmission hole correspond to the second piston chamber 52,
FIG. 5 is a schematic structural diagram of a reversing element according to an embodiment of the invention; in fig. 5, the base body of the commutator 6 is a cylinder, and has a cylindrical upper end and a cylindrical lower end, which are respectively hermetically matched with the first edge annular protrusion 24 and the second edge annular protrusion 47; the reversing piece 6 is axially divided into an upper section, a middle section and a lower section, wherein the lower section and the upper section are symmetrically arranged at two ends of the middle section 35, and the section diameter of the middle section 35 of the reversing piece is smaller than that of the upper section and the lower section of the reversing piece. The upper end face of the upper end head is provided with a chamfer 31, the side face below the upper end head is cut with a plane structure 32, the top end of the plane structure 32 is transited by a circular arc-shaped tangent plane 33, and the outer surface of the back side of the plane structure 32 is cut with a pressure relief groove 34; the structure of the lower section of the reversing piece 6 is the same as that of the upper section, except that the positions of the rectangular plane structure 32 and the pressure relief groove 34 of the lower section are opposite to those of the rectangular plane structure 32 and the pressure relief groove 34 of the upper section. The planar structure 32 of the upper section of the reversing element 6 ensures that a radial gap is formed between the planar structure 32 of the lower section and the reversing pressure-transmitting channel, and a radial gap is formed between the planar structure 32 of the lower section and the reversing pressure-transmitting channel, so that the reversing pressure-transmitting channel and the pressure-releasing hole 30 are always communicated through the radial gap.
The reversing element 6 is arranged in an accommodating cavity of the cylinder body assembly, the accommodating cavity is used as a part of a reversing pressure transmission channel, when pressure is alternately input into the accommodating cavity by utilizing the first communication channel 26 and the second communication channel 49, the reversing element 6 can axially reciprocate along the accommodating cavity under the action of the alternating pressure, and in the reciprocating movement process, the upper end head and the lower end head of the reversing element 6 are used for alternately opening or closing the first pressure transmission hole and the second pressure transmission hole. When the first pressure transmission hole is opened, the first piston cavity 51 of the cylinder body can be communicated with the outside of the cylinder body through the reversing pressure transmission channel; when the lower end head no longer blocks the second pressure transmission hole, that is, the second pressure transmission hole is opened, similarly, the second piston cavity 52 of the cylinder body can be communicated with the outside of the cylinder body through the reversing pressure transmission channel.
The pressure relief groove 34 is used for preventing the moving resistance of the reversing piece 6 from increasing due to the fact that the two ends are connected into the cavity 28 in a closed mode and the medium in the space is compressed when the reversing piece 6 moves up and down.
FIG. 7 is a schematic structural view of a sliding sleeve according to an embodiment of the present invention; in fig. 7, the sliding sleeve 8 is of a structure with an open upper part, a closed bottom and a cylindrical cavity inside, the upper end and the lower end of the sliding sleeve 8 are respectively provided with a step structure 44, and the outer diameter of the step structure 44 is equal to the inner diameter of the hollow section of the piston rod 36; the outer diameter of the middle part 45 of the sliding sleeve 8 is equal to the central aperture of the piston 38; sliding sleeve through holes 46, namely an upper sliding sleeve through hole and a lower sliding sleeve through hole, are respectively arranged on the lower surface of the stepped structure 44 close to the upper end and the upper surface of the stepped structure 44 at the lower end.
Referring to fig. 2 and 9a, the sliding sleeve 8 is disposed in the hollow cavity of the piston rod 36, the hollow cavity of the piston rod 36 serves as an axial movement track of the sliding sleeve 8, and the sliding sleeve 8 performs upper and lower limits on the axial movement by using the stepped structures 44 at the upper and lower ends of the sliding sleeve 8 and the piston 38. An upper sliding sleeve through hole of the sliding sleeve 8 corresponds to the first pressure conveying hole 37 on the piston rod 36, and a lower sliding sleeve through hole corresponds to the second pressure conveying hole 41; when the upper sliding sleeve through hole of the sliding sleeve 8 is overlapped with the first pressure input hole 37, the fluid entering the hollow cavity of the piston rod 36 can enter the first piston cavity 51 of the cylinder 5 through the upper sliding sleeve through hole and the first pressure input hole 37; when the lower sliding sleeve through hole is overlapped with the second pressure delivery hole 41, the fluid entering the hollow cavity of the piston rod 36 can enter the second piston cavity 52 of the cylinder 5 through the lower sliding sleeve through hole and the second pressure delivery hole 41.
Specifically, the assembling process of the self-circulation type piston cylinder of the present embodiment is described with reference to the accompanying drawings:
as shown in FIG. 2, the spring 9 is placed at the bottom end of the hollow tube structure of the piston rod 36, and the sliding sleeve 8 is pressed on the spring 9, since the central aperture of the piston 38 is smaller than the inner diameter of the hollow section of the piston rod 36, the sliding sleeve 8 is nested in the piston 38 by using the step structures 44 at the upper end and the lower end, then the piston assembly 7 is loaded in the cylinder 5, and the reversing piece 6 is placed in the circular channel 12 at one side of the cylinder 5.
The central hole of the second end cap 10 is inserted into the lower end of the piston rod 36, the second edge annular protrusion 47 of the second end cap 10 is inserted into the access cavity 28 on the lower end side of the cylinder 5, the second central annular protrusion 48 is inserted into the lower port of the cylinder 5, and the second end cap 10 is further fixedly connected with the cylinder 5 by using bolts.
The center hole of the first end cap 3 is inserted into the piston rod 36, the first edge annular protrusion 24 of the first end cap 3 is embedded into the access cavity 28 at the upper end of the cylinder body 5, the top end of the reversing piece 6 is embedded into the first edge annular protrusion 24, the first center annular protrusion 25 is embedded into the upper port of the cylinder body 5, and the first end cap 3 and the cylinder body 5 are further fixedly connected by bolts.
After assembly and connection, the upper end of the reversing element 6 and the top end of the first edge annular bulge 24 of the first end cover 3 are used for upper movement limit of the reversing element 6, and the bottom end of the second edge annular bulge 47 of the second end cover 10 is used for lower movement limit of the reversing element 6.
Specifically, the operation of the self-circulation type piston cylinder of the present embodiment is described with reference to the accompanying drawings:
1. initial state: as shown in fig. 9a, the spring 9 is in a natural state, under the supporting action of the spring 9, the upper surface of the piston 38 is fitted with the lower end surface of the first central annular protrusion 25, the first central annular protrusion 25 can enclose a chamber, so that the piston 38 divides the cylinder 5 into a first piston cavity 51 and a second piston cavity 52, and two ends of the reversing pressure-transmitting channel are respectively communicated with the first piston cavity 51 and the second piston cavity 52 through the first communicating channel 26 and the second communicating channel 49; the pressure relief passage 42 of the piston rod 36 also communicates with the second piston chamber 52.
The first pressure transmission hole of the cylinder 5 is closed by the piston 38, and the second pressure transmission hole of the cylinder 5 is closed by the lower end head of the reversing piece 6; the pressure relief hole 30 on the cylinder body 5 corresponds to the rectangular plane structure 32 cut on the side surface of the upper section of the reversing piece 6, so that the pressure relief hole 30 is in an open state, the reversing pressure transmission channel is communicated with the outside of the cylinder body 5, but the first pressure transmission hole and the second pressure transmission hole are both in a closed state, so that the inside of the cylinder body is isolated from the outside of the cylinder body at the moment.
The upper sliding sleeve through hole of the sliding sleeve 8 is communicated with the first pressure input hole 22 on the piston rod 36, and the lower sliding sleeve through hole of the sliding sleeve 8 and the second pressure input hole 26 are in a mutually staggered state, so that the second pressure input hole 26 is in a closed state.
2. As shown in fig. 9b, under the action of the fluid pressure continuously introduced into the hollow cavity of the piston rod 36, the fluid does not enter the second piston cavity 52 because the second pressure input hole 26 is closed; further, the fluid flows into the first piston cavity 51 of the cylinder 5 through the upper sliding sleeve through hole of the sliding sleeve 8 and the first pressure transmission hole 22, continues to enter the accommodating chamber through the first communication channel 26 opened in the first piston cavity 3 and acts on the top end of the reversing member 6, the upper end of the reversing member 6 is in close fit with the inner wall of the upper edge bulge 9, the fluid pressure drives the reversing member 6 to move downwards along the reversing pressure transmission channel, the second pressure transmission hole at the lower part of the cylinder 5 is opened, so that the second piston cavity 52 is communicated with the outside of the cylinder through the reversing pressure transmission channel, the internal pressure of the second piston cavity 52 is reduced to form a pressure difference with the inside of the first piston cavity 51, and the piston 38 and the piston rod 36 (piston assembly 7) are driven to move downwards together under the internal pressure of the first piston cavity 51.
3. Piston reversing: as shown in fig. 9c, during the downward movement of the piston assembly 7, the first pressure transfer hole of the first piston cavity 51 of the cylinder is always closed, and the first piston cavity 51 and the outside of the cylinder are also always in a non-communication state; when the piston 38 moves to the upper end face of the lower central bulge 33 at the bottom of the cylinder 5 (the lower limit of the piston 38), the first pressure transmission hole of the first piston cavity 51 of the cylinder is still closed, the first piston cavity 51 and the outside of the cylinder are still in an unconnected state, but at this time, the pressure relief channel 42 at the lower end of the piston rod 36 is communicated with the outside, so that the pressure of the space where the spring 9 is located is reduced; the continuous pressure entering the piston rod can make the sliding sleeve 8 move downwards, the spring 9 is compressed, the through hole of the lower sliding sleeve is communicated with the second pressure input hole 26, the through hole of the upper sliding sleeve is staggered with the first pressure input hole 22, the first pressure input hole 22 is closed, the fluid entering the piston rod 36 does not enter the first piston cavity 51 any more, but enters the second piston cavity 52, and the pressure in the second piston cavity 52 is increased.
4. The piston moves upwards: as shown in fig. 9d, the fluid flows into the second piston chamber 52, the fluid pressure acts on the bottom end of the direction-changing member 6 to drive the direction-changing member 6 to move upward, the first pressure transmission hole of the cylinder is opened, the first piston chamber 51 is communicated with the outside through the pressure relief hole 30, the pressure of the first piston chamber 51 is reduced, and the piston 38 moves upward under the pressure inside the second piston chamber 52.
5. Piston reversing: the piston 38 moves upward to the top end of the cylinder 5, as shown in fig. 9e, the first pressure transmission hole of the cylinder is closed by the piston 38, the second pressure transmission hole of the cylinder is closed by the lower part of the reversing element 6, at this time, the inside of the cylinder 5 is not communicated with the outside, the pressure relief channel 42 at the lower end of the piston rod 36 is communicated with the second piston cavity 52, so that the fluid pressure at the upper side and the lower side of the bottom end of the sliding sleeve 8 is balanced, the spring 9 is restored to push the sliding sleeve 8 to move upward, the through hole of the upper sliding sleeve is communicated with the first pressure transmission hole 22, and the initial state shown in fig. 9a is restored.
And then, the steps are continuously repeated, and the piston rod 36 automatically reciprocates under the action of continuous fluid pressure, so that the self-circulation piston cylinder realizes the purpose of automatic reciprocating driving.
Further, the beneficial effects of the self-circulation type piston cylinder of the present embodiment are explained with reference to the drawings:
the hydraulic cylinder of the embodiment controls the automatic reciprocating reversing of the piston 38 through the reversing mechanism, specifically, the reversing mechanism alternately reduces the pressure in the first or second piston cavity through the pressure change-over switch, and simultaneously, the first or second piston cavity alternately generates continuous and stable pressure difference through the mode that the flow direction change-over switch alternately changes continuous pressure to enter the first or second piston cavity, so that the automatic reciprocating reversing of the piston is stably controlled, and the purpose of converting the continuously introduced fluid pressure into the automatic reciprocating axial driving force is realized.
As can be seen from the above description of the working process, the pressure-operated sliding sleeve 8 is used as a reversing switch for the introduced continuous fluid to alternately enter the first piston cavity 51 or the second piston cavity 52; the reversing piece 6 is used as a reversing switch for alternately communicating the first piston cavity 51 or the second piston cavity 52 with the outside of the cylinder 5; the pressure relief channel 42 communicates the hollow cavity of the piston rod 36 with the outside or the second piston cavity 52 only when a direction change is required, for balancing the pressure in the space where the spring 9 is located, and the piston assembly and the cylinder assembly are all in a closed state at other positions. The three parts control the reversing of the piston 38 together, the sealing performance is good, and the energy consumption is low in the process of transmitting power.
The bottom of the pressure-actuated sliding sleeve 8 is supported by a spring 9, and when no fluid pressure acts, the sliding sleeve 8 is fixed in position so that it will first flow into the first piston chamber 51 when the fluid pressure is applied. And the initial position of the piston 38 has no requirement, if the piston 38 is blocked when fluid is initially introduced, the fluid pressure can automatically act on the reversing piece 6, and a channel communicated with the outside through the second piston cavity 52 is opened in time to release the pressure. Therefore, this application pneumatic cylinder possesses the self-adjusting ability, and has the stable performance's characteristics in the operation process.
FIG. 10 is a schematic view of a roll-shaping mechanism according to an embodiment of the present invention. In fig. 10, the roll truing mechanism 2 comprises truing balls 13 and a matrix which acts as a carrier for the truing balls 13 and forces the truing balls 13 to apply a force to the wall of the deformed sleeve to restore its deformation.
The matrix comprises a guide sleeve 11, an outer sleeve 12, a thrust bearing 14, an upper end cover 15 of the extruding and expanding body, a sealing ring 17, an extruding and expanding body 18, a lower end cover 19 of the extruding and expanding body, a transmission ball 20, a guide screw 21 and a plug 22.
FIG. 11 is a view of a guide sleeve according to an embodiment of the present invention; in fig. 11 and 10, the guide sleeve 11 is cylindrical, and its upper end is screwed to the tubular structure 50 at the lower end of the second end cap 10, that is, the upper end of the guide sleeve 11 is connected to the self-circulation type piston cylinder 1. One side of the guide sleeve 11 is provided with a pressure discharge hole 53, and the pressure discharge hole 53 is used for being matched with the pressure discharge channel 42 at the lower end of the piston rod 21, so that the pressure of the chamber where the spring 9 is located is released when the piston is reversed, and the spring 9 generates resilience. The inner diameter of the guide sleeve 11 is the same as the outer diameter of the upper end of the guide screw rod 21, and a guide groove 54 matched with the guide screw rod 21 is arranged on the inner wall of the guide sleeve 11; the bottom end of the bearing is provided with a clamping groove which is convenient for installing the thrust bearing 14. An annular bulge 55 extends from the bottom end surface of the guide sleeve 11, threads are arranged on the outer surface of the annular bulge 55, and the guide sleeve 11 is connected with the upper port of the outer sleeve 12 through the external threads.
FIG. 12 is a diagram of a orthopedic outer cover configuration in accordance with an embodiment of the present invention; in fig. 12 and 10, the outer sleeve 12 is a cone, the wall of the outer sleeve is provided with a plurality of limiting holes 56 for accommodating the shaping balls 13, and the outer inner diameter of the limiting holes 56 is smaller than the inner diameter thereof, so as to effectively limit the shaping balls 13 and serve as a track for the shaping balls 13 to radially extend and retract; the plurality of limiting holes 56 in the outer wall of the outer sleeve 12 are preferably arranged in an axially and circumferentially equidistant manner with adjacent limiting holes being staggered. Annular protrusions 57 are respectively arranged at the upper end and the lower end of the outer sleeve 12, and the annular protrusions 57 are provided with threads respectively used for establishing connection with the guide sleeve 11 and the plug 22. The thrust bearing 14 is mounted at the lower end of the outer sleeve 12.
FIG. 13 is a view of the upper end cap of the inflatable body in accordance with an embodiment of the present invention; in fig. 13 and 10, the upper end cap 15 of the expansion body is circular, the upper end of the outer side of the upper end cap is provided with a chamfer 58, four screw holes 59 are uniformly formed along the circular shape and provided with threads, a rectangular groove 60 is arranged above the screw hole 59, and the screw hole 59 is used for being matched with a bolt to connect the expansion body 18; the upper end cover 15 of the extrusion body is provided with a mounting groove of a sealing ring 17, the inner diameter of the lower section of the mounting groove is larger than that of the upper section, and the outer diameter of the sealing ring 17 is consistent with that of the lower section so as to limit the axial dislocation of the sealing ring 17.
Fig. 14 is a structure view of a seal ring according to an embodiment of the present invention, as shown in fig. 14, the seal ring 17 is circular, and the inner side of the seal ring is provided with a male screw 61 having the same pitch and diameter as the first spiral groove 64 on the inner side of the bulge 18, and the male screw 61 cooperates with the first spiral groove 64 to prevent impurities from entering the motion circuit of the transmission ball 20 during the reshaping operation. The bottom end of the sealing ring 17 is provided with four rectangular grooves 62 which are uniformly distributed.
FIG. 15 is a structural view of an inflatable body in accordance with an embodiment of the present invention; in fig. 15, the expander 18 is a cone that mates with the cone of the jacket 12. The outer wall of the extruding body 18 is provided with a moving groove rail 63 of the shaping ball 13, the moving groove rail 63 can be a plurality of circles of equidistant grooves which are arranged along the axial direction, the shaping ball 13 is arranged in the moving groove rail 63, the depth and the width of the moving groove rail 63 are changed periodically, the shaping ball 13 moves along the moving groove rail 63 which is changed periodically, the moving mode comprises periodic radial telescopic motion and/or rolling motion and/or spinning motion, the shaping ball 13 exerts periodic radial pressure on the deformed sleeve through the periodic radial telescopic motion on one hand, and exerts periodic rolling pressure on the deformed part of the sleeve through the rolling motion and/or the spinning motion on the other hand, so that the deformed sleeve shapes the sleeve wall in a multidimensional mode under the effect of the periodic radial pressure and the rolling pressure of the shaping ball 13, and the intermittent rolling shaping is realized. The inner wall of the expander 18 is provided with a first spiral grooved track 64, in which a return channel 65 with a circular cross-section is provided. The upper and lower ends of the expander 18 are provided with projections 66 corresponding to the rectangular recesses 62 on the sealing ring 17 to limit circumferential rotation of the sealing ring 17. And a hole 67 with the same inner diameter as the limiting hole on the upper end cover and the lower end cover and provided with threads.
FIG. 16 is a view of the lower end cap of the inflatable body in accordance with an embodiment of the present invention; as shown in fig. 16, the lower squish head 19 is shaped to function as the upper squish head 15.
FIG. 17 is a structural view of a guide screw according to an embodiment of the present invention; as shown in fig. 17, the outer wall of the upper end of the guide screw 21 is provided with a rectangular key 68 for cooperating with the key groove 54 on the guide sleeve, so that the guide screw 21 can only perform axial movement but not rotational movement. The surface of the guide screw 21 is provided with a second spiral grooved rail 69, the pitch and the diameter of the second spiral grooved rail 69 correspond to the first spiral grooved rail 64 on the inner wall of the extruding and expanding body 18, and the first spiral grooved rail 64, the loop channel 65 and the second spiral grooved rail 69 jointly form a motion loop when the transmission ball 20 works. The upper end face of the guide screw 21 is provided with a cylindrical groove 70, threads are arranged in the cylindrical groove 70 and used for establishing connection with the lower end of the piston rod 21, so that the self-circulation type piston cylinder drives the guide screw 21 to synchronously perform automatic reciprocating motion, and the transmission ball 20 transmits power in a motion loop.
FIG. 18 is a schematic diagram of a plug according to an embodiment of the present invention; as shown in FIG. 18, the upper port of the plug 22 is connected by the external thread of the annular protrusion 57 at the lower end of the shaping outer sleeve, the lower end face of the plug 22 is provided with a fillet 71, and the bottom face is provided with a through hole 72.
Specifically, the assembly relationship of the rolling shaping mechanism according to the embodiment of the present invention is described with reference to the accompanying drawings:
as shown in fig. 10, the upper end of the guide screw 21 is screwed with the lower end of the piston rod 21, the rectangular key 68 on the guide screw is matched with the guide groove 54 on the guide sleeve, and the thrust bearing 14 is placed at the lower end of the guide sleeve 11. The transmission ball 20 is arranged in the loop channel 65, and the upper end and the lower end of the extrusion body 18 are respectively provided with a sealing ring 17; the upper end cover 15 and the lower end cover 19 of the expansion body 18 are respectively connected with the upper end and the lower end of the expansion body 18 through bolts, and the guide screw 21 is installed with the expansion body 18 in a matching way. Placing the shaping ball 13 in the round hole 56 of the shaping outer sleeve, wherein the shaping ball 13 can move in the moving groove rail 63 of the extruding and expanding body 18; then the extruding body 18 is arranged in the outer sleeve 12, the upper end of the outer sleeve 12 is in threaded connection with the annular bulge 55 at the lower end of the guide sleeve, the thrust bearing 14 is embedded in the inner side of the annular bulge 57 at the lower end of the outer sleeve 12, and the outer side of the annular bulge 57 is in threaded connection with the screw plug 22.
Specifically, the working principle of the rolling shaping mechanism according to the embodiment of the present invention is described with reference to the accompanying drawings:
the guide screw 21 reciprocates axially, and the guide screw 21, the transmission balls 20, and the expander 18 constitute a ball screw pair, and when the guide screw 21 reciprocates axially, the expander 18 rotates simultaneously by the principle that linear motion of the ball screw pair is converted into rotational motion.
The thrust bearings 14 at the two ends of the expander 18 further limit the motion state of the expander 18, ensuring that the expander 18 can only perform rotary motion.
The shaping ball 13 is positioned between the moving groove rail 63 on the extruding and expanding body 18 and the limiting hole 56 on the outer sleeve 12, and when the extruding and expanding body 18 rotates, the shaping ball 13 is driven to do radial telescopic motion, so that the shaping ball 13 can roll and shape the deformed sleeve intermittently.
Because the extrusion body 18 and the outer sleeve 12 form a cone structure, namely the rolling shaping mechanism 2 is a reducing shaping mechanism, multi-stage shaping can be realized, thereby effectively reducing the times of pulling out and pulling down the column and reducing the maintenance cost.
Multiple times of extruding, expanding and rolling of the single-stage balls at the deformed position of the same sleeve can be achieved, compared with a rolling mode of a traditional ball shaping tool, the intermittent rolling can strengthen the single-stage rolling shaping effect in single shaping, and the strength of the repaired sleeve of the deformed sleeve is improved.
A transmission mechanism consisting of the guide screw 21, the transmission ball 20 and the extruding and expanding body 18 is positioned in the outer sleeve 12, so that on one hand, a transmission isolation space is formed, and the transmission efficiency is ensured; on the other hand, the movement load of the transmission ball 20 is reduced, and the abrasion consumption is reduced.
The rolling shaping mechanism 2 adopts a ball screw pair transmission principle, and on the first hand, compared with the traditional thread screw transmission, the rolling shaping mechanism can reduce the friction loss in the transmission process and improve the transmission efficiency; the rigidity of the transmission screw rod can be improved by applying pre-pressure; in the second aspect, the ball screw pair has high precision and non-self-locking characteristics, and can improve the transmission stability when the rolling shaping mechanism 2 performs axial motion conversion rotation motion.
The depth and the width of the moving groove rail 63 on the surface of the extruding body 18 are changed periodically, and the balls move along the groove and can be regularly and radially stretched, so that the intermittent rolling shaping is realized.
Specifically, a casing reshaping tool according to an embodiment of the present invention will be described with reference to the accompanying drawings:
as shown in fig. 1 and 10, the guide screw 21 of the rolling and shaping mechanism 2 is connected to the piston rod 21 of the self-circulation type piston cylinder 1, and the self-circulation type piston cylinder 1 drives the guide screw 21 of the rolling and shaping mechanism 2 to perform axial reciprocating motion, so as to complete the shaping of the casing.
The above-mentioned embodiments are merely embodiments for expressing the invention, and the description is specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, without departing from the concept of the present invention, it is possible for those skilled in the art to make various changes, substitutions of equivalents, improvements, and the like, which fall within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (11)
1. A casing conforming tool comprising:
a rolling shaping mechanism;
the rolling shaping mechanism comprises shaping balls (13) and a moving groove rail (63), wherein the shaping balls (13) stretch and contract radially along the moving groove rail (63) to apply radial shaping pressure to a deformed part of the sleeve; the basal body of the moving groove rail (63) is a cone so that the radial expansion length of the shaping ball (13) is changed in multiple stages along the axial direction; the multistage change is used for performing multistage shaping on the sleeve;
the rolling shaping mechanism is connected with the self-circulation type piston cylinder;
the self-circulation type piston cylinder automatically reciprocates to drive the shaping ball (13) to move along the moving groove rail (63);
the self-circulation piston cylinder comprises a cylinder body assembly, a piston assembly (7) and a reversing mechanism, wherein the piston assembly (7) divides the cylinder body assembly into a first piston cavity (51) and a second piston cavity (52), and the cylinder body assembly comprises a first end cover, a cylinder body (5) and a second end cover; the reversing mechanism comprises a pressure change-over switch and a flow direction change-over switch, and the flow direction change-over switch is used for alternately introducing continuous pressure into the first piston cavity (51) or the second piston cavity (52); the pressure change-over switch is used for reducing the pressure which is not led into the continuous pressure chamber so as to form an alternate pressure difference between the first piston cavity (51) and the second piston cavity (52), and the piston assembly (7) is driven to automatically reciprocate by the alternate pressure difference;
the pressure change-over switch comprises a reversing piece (6) and a reversing pressure transmission channel; the flow direction change-over switch is connected with the piston assembly (7) and comprises a sliding sleeve (8) and a spring (9);
an axial channel (27) at one side of the cylinder body (5) and a first edge annular bulge (24) and a second edge annular bulge (47) which are respectively positioned at two ends of the channel jointly form an accommodating cavity, the accommodating cavity and a first communicating channel (26) on the first end cover and a second communicating channel (49) on the second end cover jointly form a reversing pressure transmitting channel, and two ends of the reversing pressure transmitting channel are communicated with an inner cavity of the cylinder body (5);
pressure transfer holes (29) are respectively arranged between the two access cavities (28) at the two ends of the axial channel (27) and the inner cavity of the cylinder body (5), and are respectively a first pressure transfer hole and a second pressure transfer hole; the middle part of the axial channel (27) is provided with a pressure relief hole (30) communicated with the outside of the cylinder body, and the cylinder body (5) is communicated with the outside of the cylinder body by the axial channel (27), the first pressure transfer hole or the second pressure transfer hole and the pressure relief hole (30);
the piston assembly (7) comprises a piston rod (36) and a piston (38); the piston (38) is fixed on the hollow section of the piston rod (36), a first pressure conveying hole (37) and a second pressure conveying hole (41) are formed in the hollow section of the piston rod (36), and the first pressure conveying hole (37) and the second pressure conveying hole (41) are respectively located above and below the piston (38); a pressure relief channel (42) between the inside of the hollow section and the outside of the piston rod (36) is arranged in the solid section (40) of the piston rod (36); the piston (38) divides the interior of the cylinder body (5) into a first piston cavity (51) and a second piston cavity (52), the first pressure transmission hole (37), the first communication channel (26) and the first pressure transmission hole correspond to the first piston cavity (51), and the second pressure transmission hole (41), the second communication channel (49) and the second pressure transmission hole correspond to the second piston cavity (52);
the base body of the reversing piece (6) is a cylinder and is provided with a cylindrical upper end head and a cylindrical lower end head, and the upper end head and the lower end head are respectively in close fit with the first edge annular bulge (24) and the second edge annular bulge (47); the reversing piece (6) is axially divided into an upper section, a middle section and a lower section; a radial gap is formed between the planar structure (32) at the upper section of the reversing piece (6) and the reversing pressure transmission channel, a radial gap is formed between the planar structure (32) at the lower section of the reversing piece and the reversing pressure transmission channel, and the reversing pressure transmission channel and the pressure relief hole (30) are always communicated through the radial gap; the reversing piece (6) is arranged in the accommodating cavity of the cylinder body assembly; when pressure is alternately input into the accommodating chamber by utilizing the first communicating channel (26) and the second communicating channel (49), the reversing piece (6) axially reciprocates along the accommodating chamber under the action of the alternating pressure of the reversing piece (6), and in the reciprocating movement process, the upper end head and the lower end head of the reversing piece (6) are used for alternately opening or closing the first pressure transmission hole and the second pressure transmission hole; when the first pressure transmission hole is opened, a first piston cavity (51) of the cylinder body is communicated with the outside of the cylinder body through a reversing pressure transmission channel; when the lower end head does not block the second pressure transmission hole any more, namely the second pressure transmission hole is opened, a second piston cavity (52) of the cylinder body can be communicated with the outside of the cylinder body through the reversing pressure transmission channel;
the outer diameter of the middle part (45) of the sliding sleeve (8) is equal to the central aperture of the piston (38); sliding sleeve through holes (46) are respectively arranged on the lower surface of the stepped structure close to the upper end and the upper surface of the stepped structure at the lower end, and are an upper sliding sleeve through hole and a lower sliding sleeve through hole respectively; the sliding sleeve (8) is arranged in the hollow section inner cavity of the piston rod (36), and the hollow inner cavity of the piston rod (36) is used as an axial moving track of the sliding sleeve (8); an upper sliding sleeve through hole of the sliding sleeve (8) corresponds to a first pressure conveying hole (37) on the piston rod (36), and a lower sliding sleeve through hole corresponds to a second pressure conveying hole (41); when the upper sliding sleeve through hole of the sliding sleeve (8) is overlapped with the first pressure conveying hole (37), fluid entering the hollow cavity of the piston rod (36) can enter the first piston cavity (51) of the cylinder body (5) through the upper sliding sleeve through hole and the first pressure conveying hole (37); when the lower sliding sleeve through hole is overlapped with the second pressure conveying hole (41), fluid entering the hollow cavity of the piston rod (36) can enter the second piston cavity (52) of the cylinder body (5) through the lower sliding sleeve through hole and the second pressure conveying hole (41);
the spring (9) is arranged at the bottom end of the hollow tube structure of the piston rod (36), and the sliding sleeve (8) is pressed on the spring (9).
2. The casing reshaping tool of claim 1, wherein:
the depth and/or width of the moving groove rail (63) are/is periodically changed so that the shaping ball (13) synchronously rolls and/or spins while performing radial expansion and contraction;
the rolling and/or spinning action of the shaping balls (13) is used on the deformation site to produce a crushing force that restores its deformation.
3. The casing reshaping tool of claim 1, wherein:
the moving groove rail (63) is a plurality of circles of grooves which are arranged along the axial direction of the base body;
the substrate includes:
an outer jacket (12);
the outer sleeve (12) is a conical cylinder, and the wall of the outer sleeve is provided with a plurality of limiting holes (56);
the limiting hole (56) is used as a track for the shaping ball (13) to expand and contract in the radial direction and limits the shaping ball (13) at the inner side of the outer sleeve (12).
4. The casing reshaping tool of claim 3, wherein:
the arrangement mode of the limiting holes (56) on the outer sleeve (12) corresponds to the grooves.
5. The casing reshaping tool of claim 3, wherein:
the grooves are arranged at equal intervals along the axial direction of the base body;
the limiting holes (56) are arranged on the outer sleeve (12) in an axially and circumferentially equidistant mode, and adjacent limiting holes (56) are arranged in a staggered mode.
6. The casing reshaping tool of claim 3, wherein:
the matrix further comprises an expander (18);
the moving grooved rail (63) is arranged on the outer wall of the extrusion body (18);
the expansion body (18) rotates to drive the shaping balls (13) to perform radial expansion and contraction along the moving groove rail (63).
7. The casing reshaping tool of claim 6, wherein:
the extruding and expanding body (18) and the guide screw rod (21) form a ball screw pair;
the guide screw (21) moves linearly to drive the expansion body (18) to rotate.
8. The casing reshaping tool of claim 7, wherein:
the inner wall of the extruding and expanding body (18) is provided with a first spiral grooved rail (64), and a loop channel (65) is arranged in the wall;
a second spiral groove rail (69) is arranged on the surface of the guide screw rod (21);
the first spiral groove track (64), the loop channel (65) and the second spiral groove track (69) form a motion loop;
transmission balls 20 are placed in the motion circuit to convert the linear motion of the guide screw (21) into a rotary motion of the expander (18).
9. The casing reshaping tool of claim 8, wherein:
the upper end and the lower end of the extrusion body (18) are respectively provided with a sealing ring (17);
the sealing ring (17) is used for preventing impurities in the shaping process from entering the motion circuit to wear the transmission ball (20).
10. The casing reshaping tool of claim 1, wherein:
the self-circulating piston cylinder comprises a piston rod (36);
the piston rod (36) is connected with the base body to move so that the shaping ball (13) moves along the moving groove rail (63).
11. The casing reshaping tool of claim 1, wherein:
the lower end of the self-circulation type piston cylinder is fixedly connected with an outer sleeve (12);
during the reshaping process, the outer sleeve (12) is stationary relative to the moving groove rail (63).
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| CN202110415699.8A CN113006725B (en) | 2021-04-19 | 2021-04-19 | Rolling shaping mechanism and sleeve shaping tool |
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| CN202110415699.8A CN113006725B (en) | 2021-04-19 | 2021-04-19 | Rolling shaping mechanism and sleeve shaping tool |
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Effective date of registration: 20230525 Address after: 163000 Zhang Tiejiang, Honggang District, Daqing City, Heilongjiang Province Patentee after: DAQING DONGYOU DRILLING Co.,Ltd. Address before: 163318 No. 199, development road, hi tech Development Zone, Heilongjiang, Daqing Patentee before: NORTHEAST PETROLEUM University |