CN104141460A - Rotary type variable-diameter oil pipe clamping device - Google Patents

Abstract

A rotary type variable-diameter oil pipe clamping device comprises casings, hydraulic cylinders, slip assemblies or tong tooth assemblies, side doors, side door bolts, rotating discs, transmission devices, positioning devices, steel balls, oil port connectors, spring pins and sealing mechanisms. Multiple groups of slip assemblies with different inner diameter specifications or multiple groups of tong tooth assemblies with different inner diameter specifications are assembled, according to the outer diameter specification of an oil pipe required to be clamped, one group of slip assemblies or one group of tong tooth assemblies matched with the outer diameter specification of the oil pipe required to be clamped are selected and used by rotating the rotating discs, and further, the one group of slip assemblies or the one group of tong tooth assemblies matched with the outer diameter specification of the oil pipe required to be clamped are used in place so as to adapt to the change of the outer diameter specification of the oil pipe required to be clamped, the work time is saved, the production efficiency is improved, and the new potential safety hazard is completely eradicated.

Description

Swinging reducing oil pipe clamping device

Technical field

The present invention relates to a kind of oil pipe clamping device, especially swinging reducing oil pipe clamping device.

Background technology

Oil pipe clamping device is the utensil of the clamping oil pipe that uses in oil gas field shaft mouth operation, at present, general oil pipe clamping device adopts hydraulic-driven, is referred to as hydraulic oil pipe binding clasp, in the time of lower oil tube, hydraulic oil pipe binding clasp can be realized clamping oil pipe well, hydraulic oil pipe binding clasp is made up of housing, hydraulic cylinder, slips assembly, side door, side door bolt, port connection, and hydraulic oil pipe binding clasp also comprises sealing mechanism, hydraulic oil pipe binding clasp is symmetrical structure, and its left side structure is identical and symmetrical with the specification framework of right side structure, the center of its housing is the main through hole of circular configuration, on housing, there are two flange arrangements, the main through hole two ends that are housing are fixedly connected with respectively flange arrangement, the center line of flange arrangement and the center line of main through hole are on same straight line, housing has two side through hole, and two side through hole communicate with main through hole respectively, and a side through hole is positioned at main through hole one side, another side through hole is positioned at main through hole opposite side, the center line of two side through hole on same straight line and with the vertical and intersectant centerline of main through hole, hydraulic cylinder comprises cylinder barrel and cylinder cap, piston and piston rod, screw mandrel, cylinder barrel bolt and sealing device, piston rod is fixedly connected on a side of piston, the outer end of piston rod is pin thread structure, its top is plane, be referred to as top plane, top plane is vertical with the center line of piston, the two sides that are connected with top plane are that plane is side plane, its two side plane is vertical with top plane respectively, and be parallel to each other, the vertical distance that its point is clipped to the center line of piston equates, between side plane and piston rod main body, fluted structure is connected, groove structure open at both ends, its groove bottom is parallel with side plane, its two grooves side is parallel to each other, and vertical with groove bottom, the top plane parallel of groove side and piston rod, on piston rod, there is the blind hole of connection wire rod, the blind hole of connection wire rod and the central through hole of piston interlink, the blind hole of connection wire rod and the central through hole of piston and piston rod, the center line of piston is on same straight line, in the blind hole of the central through hole of piston and the connection wire rod linking together, there is internal thread, screw mandrel comprises body and step, body is circular pin, the step of the outwardly annular of intermediate peripheral wall of body, its step separates leading portion and back segment screw mandrel body, the external diameter of leading portion is less than the external diameter of back segment, on the leading portion of body, there is male thread.Slips assembly comprises slip spider, slip insert, on slip spider, there is box structure, box structure is convex slot, it is made up of inside groove and water jacket, there is convex slot in the outside that is the pedestal of slip spider, laterally break-through pedestal, its groove bottom is plane, convex slot comprises inside groove and water jacket, the width of its inside groove is greater than the width of water jacket, vertical distance between two groove bottom of two groove structures at the top of the pin thread structure of the vertical distance between two groove sides of water jacket and the outer end of piston rod is identical, the width of the groove structure groove bottom of the pin thread structure of the outer end of its piston rod is identical with the width of the groove side of the water jacket of the box structure of slip spider, the pin thread structure top plane of the outer end of piston rod is identical to the degree of depth of the vertical distance of groove side adjacent with top plane of groove structure and the inside groove of the box structure of slip spider, vertical distance between two groove sides of the inside groove of the convex slot of the vertical distance between two side planes of the pin thread structure of the outer end of piston rod and the box structure of slip spider equates, slip spider and slip insert interconnect, between slip spider and slip insert, adopt direct fixed connection structure or adopt by the dog screw fixed connection structure of socket cap, in the time adopting direct fixed connection structure between slip spider and slip insert, between slip spider and slip insert, do not pass through other member, slip spider is directly fixedly connected with mutually with slip insert, and slips assembly is as a whole, in the time adopting the dog screw fixed connection structure that passes through socket cap between slip spider and slip insert, slips assembly comprises the dog screw that also comprises socket cap, and there is external screw thread the rear end of the dog screw of socket cap, slip spider has interior arc-shaped structure, interior arc-shaped structure and box structure lay respectively at slip spider pedestal in, outside, on interior arc-shaped structure, there is circular connecting hole, the center line of the circular connecting hole of its slip spider and the center line of slip spider are on same straight line, and vertical with the groove bottom of the convex slot of the box structure of slip spider, on slip spider, there is the positioning screw hole of two socket caps, the positioning screw hole of two socket caps lays respectively at the both sides of circular connecting hole and communicates with circular connecting hole respectively, the center line of the positioning screw hole of two socket caps point-blank, the vertical and intersectant centerline of its center line and circular connecting hole, in the positioning screw hole of socket cap, there is internal thread, slip insert is circular arc sheet, in its slip insert has, outer two wall side faces, a wall is inner circle arc side face, be referred to as inwall side face, another wall side face is cylindrical arc side face, be referred to as outer wall side face, on its inwall side face, there is locking teeth structure, outwardly circular coupling bar on outer wall side face, locking teeth structure and circular coupling bar lay respectively at slip insert body in, outside, the circular center line of coupling bar and the center line of slip insert are point-blank, there is annular fixed groove the outer end of circular coupling bar, external diameter and the length of circular coupling bar are corresponding identical with internal diameter and the degree of depth of circular connecting hole, the circular coupling bar of its slip insert injects in the circular connecting hole of its slip spider and matches like this, the outer wall side face of slip insert and the inwall side face of the interior arc-shaped structure of slip spider are mutually by connecting, in the positioning screw hole of two socket caps on slip spider, inject respectively the dog screw of socket cap, make to screw and be connected between the external screw thread of rear end of the dog screw of socket cap and the internal thread of the positioning screw hole of socket cap, the front end of the dog screw of socket cap puts in the annular fixed groove of circular coupling bar and is connected with the annular fixed groove of circular coupling bar, make the dog screw of two socket caps clamp and block circular coupling bar, thereby the circular coupling bar of fixing and locking, like this, piston rod packs in the hole in the middle of side door, the pin thread structure of piston rod injects in the box structure on slip spider and mutually coincide, piston and piston rod are inserted in cylinder barrel, internal thread in the blind hole of the connection wire rod of the male thread on the leading portion of the body of screw mandrel and the central through hole of piston and the piston rod that links together screws and is connected, cylinder cap sealing shroud connects the back segment of the body of screw mandrel, the sealing device of hydraulic cylinder comprises the sealing between the sealing between the back segment of body of cylinder cap and screw mandrel and sealing and side door and the cylinder barrel between cylinder cap and cylinder barrel, sealing between piston rod and side door, sealing between piston rod and side door is divided into two parts, a part is that sealed well is pressed, a part is the oil pressure that sealing hydraulic control produces, twice sealing mechanism is between Zhe Liang department, for making the sealing at this place very reliable, there is the sealing ring of multiplet, and the auxiliary seal of middle O-ring seals, side door itself is connected with housing by side door bolt, side door is positioned at the side through hole outside of housing, cylinder cap and cylinder barrel are fixed together by cylinder barrel bolt and side door, and slips assembly is installed and connected in the side through hole of housing, and the sealing between side door and cylinder barrel adopts y-shaped ring to realize two way seal, the sealing mechanism of hydraulic oil pipe binding clasp comprises sealing between sealing device and side door and the housing of hydraulic cylinder and the sealing of oil circuit, in the body of housing, there are two oil circuit holes, one oil circuit hole collar extension of its housing is positioned at outside, housing front, internal orifice is two, it lays respectively at the outside of housing two side through hole, oil circuit hole two internal orifices respectively identical with the specification in the oil circuit aperture of its corresponding connected side door, link position is corresponding, its oil circuit hole collar extension is fixedly connected with port connection, another oil circuit hole collar extension of its housing is also positioned at outside, housing front, internal orifice is two, it lays respectively at the outside of housing two side through hole, oil circuit hole two internal orifices respectively identical with the specification in the oil circuit aperture of its corresponding connected side door, link position is corresponding, its oil circuit hole collar extension is fixedly connected with port connection, in cylinder cap body, have an oil circuit hole, cylinder cap body is pierced into from the cylinder cap inner side all sides that are connected corresponding to cylinder barrel in its oil circuit hole, and passes in the middle of cylinder cap inner side, cylinder barrel has an oil circuit hole, the one oil circuit orifice sealing in all side oil circuit apertures in cylinder cap oil circuit hole and the oil circuit hole of cylinder barrel joins, oil circuit aperture in the middle of the inner side in the oil circuit hole of cylinder cap is led in cylinder barrel, in its side door, there are two oil circuit holes of crossing side door, the two oil circuit apertures in an oil circuit hole of side door interlink with another oil circuit aperture in oil circuit hole and an oil circuit hole sealing of housing of cylinder barrel respectively, and another oil circuit hole sealing of another oil circuit hole of side door and housing interlinks and leads in cylinder barrel, its each parts are successively installed and have been connected according to program respectively, all have rubber seal to connect between each interface in its each oil circuit hole, and it forms the oil circuit of independent completion sealing.The sealing of the sealing between the each interface in hole, sealed packet oil scraper road of oil circuit and the oil circuit hole collar extension of port connection and housing, the left and right symmetry of structure of hydraulic oil pipe binding clasp, two slips assemblies are located opposite from respectively in the left and right side through hole of housing, and two relative slips assembly forms one group of slips assembly, the be tightly connected hydraulic oil pipeline of hydraulic system of port connection, in the time that hydraulic control system hydraulic oil enters left and right cylinder barrel and closes chamber, promoting piston driving left and right slips assembly moves to well head center respectively along the side through hole of housing, realize and clamp oil pipe, in the time that hydraulic oil enters cylinder barrel unlatching chamber, left and right, promote piston driving left and right slips assembly to leaving the motion of well head center position, unclamp oil pipe, slips assembly switch is by the reversal valve control of the hydraulic control unit of hydraulic system, but one group of oil pipe installing in same a bite Oil/gas Well is is normally connected and composed by the oil pipe of various outer diameter specification, so at lower oil tube, while using hydraulic oil pipe binding clasp to clamp oil pipe, needs that will be different according to the external diameter specification of oil pipe, use and the external diameter specification of its oil pipe slips assembly of different internal diameter specifications mating that adapts, the internal diameter specification of slips assembly refers to the internal diameter specification of the inwall side face of the slip insert of slips assembly, and once hydraulic oil pipe binding clasp has been assembled, one group of slips assembly of equipment in its hydraulic oil pipe binding clasp, the internal diameter specification of the slips assembly of its hydraulic oil pipe binding clasp is fixing can not change just, remove like this oil gas field OIH pipe, its hydraulic oil pipe binding clasp will be changed repeatedly slip insert or slips assembly conventionally, to adapt to the variation of external diameter specification of oil pipe of required clamping, and change repeatedly slip insert or slips assembly process complexity, trouble, also can lose time, and repeatedly dismantle hydraulic cylinder and tend to damage the sealing of oil circuit, damage hydraulic oil pipe binding clasp, produce new potential safety hazard.

Summary of the invention

The object of the invention is: a kind of swinging reducing oil pipe clamping device is provided, it has overcome the defect of one group of slips assembly of equipment in hydraulic oil pipe binding clasp, the slips assembly of the many groups of swinging reducing oil pipe clamping device equipment different inner diameters specification or the pincers tooth assembly of the many groups of equipment different inner diameters specification, according to the external diameter specification of the oil pipe of required clamping, by revolution rotating disk, choice for use and the external diameter specification of the oil pipe of required clamping one group of slips assembly mating or choice for use and the external diameter specification of the oil pipe of the required clamping one group of pincers tooth assembly mating that adapts that adapts, and make and the adapt one group of slips assembly use in place of mating or make and the one group of pincers tooth assembly use in place of mating that adapts of the external diameter specification of the oil pipe of required clamping of the external diameter specification of the oil pipe of required clamping, thereby adapt to the variation of the external diameter specification of required clamping oil pipe, save the working time like this, save and change the trouble that slip insert or slips assembly or pincers tooth assembly bring, greatly improve workman's labor productivity, stop to produce new potential safety hazard.

The object of the present invention is achieved like this: swinging reducing oil pipe clamping device is the utensil of the clamping oil pipe that uses in oil gas field shaft mouth operation, and it adopts hydraulic-driven.Swinging reducing oil pipe clamping device comprises shell, hydraulic cylinder, slips assembly or pincers tooth assembly, side door, side door bolt, rotating disk, transmission device, positioner and steel ball, port connection, spring catch, and swinging reducing oil pipe clamping device also comprises sealing mechanism.Swinging reducing oil pipe clamping device is symmetrical structure, and its left side structure is identical and symmetrical with the specification framework of right side structure.Spring catch comprises shell, spring, pin.Its shell comprises housing, the fastening structure of case lid and case lid and housing, Hermetical connecting structure, housing comprises body and flange arrangement, body is rectangular structure, the center of body is the main through hole of hollow circular configuration, the center line of main through hole and the center line of housing are on same straight line, inside chime rings shape structure on the internal perisporium of one end of main through hole, at the bottom of it is the annular of body, the center line of the center hole at the bottom of the annular of body and the center line of housing are on same straight line, inner face at the bottom of the annular of body is the plane of cirque structure, the other end of main through hole is referred to as outer end, on all its bodies of side in outer end, there is driving gear installing hole, driving gear installing hole on housing comprises counterbore and axis hole, side channel, counterbore is circular hole, the internal diameter of counterbore is greater than the internal diameter of axis hole, between counterbore internal perisporium and the internal perisporium of axis hole, form a ledge structure, the center line of counterbore and axis hole is on same straight line, on the perisporium of axis hole, have and be communicated with the main through hole of body and the side channel of axis hole, the center line of body is respectively perpendicular to two relative groove sides of side channel, driving gear is installed and connected on housing by the driving gear installing hole of housing, driving gear comprises toothed disc and axle, connection teeth wheel disc is installed in side channel, and there is axle connecting through hole the centre of toothed disc, and axle connecting through hole is square hole, the axle of driving gear is made up of four parts, be columniform head, on the top of its head, have interior hexagonal structure, the afterbody of cylindrical structural, the middle part of cube structure, is connected in the cylindrical structural that its external diameter between head and middle part is greater than the external diameter of head, axle sleeve enters in the axle connecting through hole of toothed disc, the afterbody of axle puts in the axis hole being inserted on housing, the middle part of axle is enclosed within the axle connecting through hole of centre of toothed disc, on axle, overlap connected set circle, lasso is circular ring structure, the cylindrical structural being connected between head and middle part of the axle of driving gear overlaps connected set circle, lasso is inserted in the counterbore of driving gear installing hole of housing, lasso respectively and the counterbore of driving gear installing hole of housing and the cylindrical structural being connected between head and middle part of the axle of driving gear be tightly connected, uniform multiple connection blind holes on its body of the outer circumferential side of the outer end of main through hole, are internal thread in its blind hole, and the center line of blind hole is parallel with the center line of housing, body has two side through hole, and two side through hole communicate with main through hole respectively, and a side through hole is positioned at main through hole one side, and another side through hole is positioned at main through hole opposite side, the center line of two side through hole on same straight line and with the vertical and intersectant centerline of main through hole, outside at the bottom of the annular of body is flange arrangement, and the center line of flange arrangement and the center line of main through hole are on same straight line, and the middle circular hole at the bottom of the intermediate throughholes of flange arrangement and the annular of body interlinks, and has annular groove on the lateral surface of flange arrangement, on housing, there is spring catch connecting through hole, spring catch connecting through hole is installed linking springs pin, spring catch connecting through hole is positioned at the perisporium of housing and penetrates the perisporium of housing, the center line of spring catch connecting through hole and the vertical and intersectant centerline of housing, spring catch is fixedly connected on housing by the spring catch connecting through hole of housing, spring catch is connected with housing seal, comprise two parts, the one, being tightly connected of the spring catch connecting through hole of the shell of spring catch and housing, the one, being tightly connected of the spring catch connecting through hole of the pin of spring catch and housing, the pin of spring catch stretches to the main through hole of housing, case lid comprises covers body, step, flange arrangement, side through hole, connecting through hole, lid body is cirque structure, in the middle of lid body, it is round tube hole, the step that one side of lid body is outwardly cirque structure, round tube hole in the middle of step interlinks with the round tube hole in the middle of lid body, the opposite side of lid body is flange arrangement, the through hole of the centre of flange arrangement interlinks with the round tube hole of the centre of lid body, step and lid body, the center line of flange arrangement is on same straight line, on the lateral surface of flange arrangement, there is annular groove, all sides of the round tube hole of the centre of lid body have a side through hole, the internal diameter of side through hole equals the external diameter of the head of the axle of driving gear, all sides of the round tube hole of the centre of lid body are uniformly distributed multiple connecting through holes.Hydraulic cylinder comprises cylinder barrel and cylinder cap, piston and piston rod, screw mandrel, cylinder barrel bolt and sealing device, piston rod is fixedly connected on a side of piston, on piston rod, there is the blind hole of connection wire rod, the blind hole of connection wire rod and the central through hole of piston interlink, the blind hole of connection wire rod and the central through hole of piston and piston rod, the center line of piston is on same straight line, in the blind hole of the central through hole of piston and the connection wire rod linking together, there is internal thread, screw mandrel comprises body and step, body is circular pin, the step of the outwardly annular of intermediate peripheral wall of body, its step separates leading portion and back segment the body of screw mandrel, the external diameter of leading portion is less than the external diameter of back segment, on the leading portion of body, there is male thread, the top of the outer end of the side through hole that puts in housing of piston rod comprises pin thread and the pin connecting hole of head, pin thread comprises pin thread head and pin thread groove, the annular groove of the center line around piston that pin thread groove is concaved out by the head perisporium of piston rod, the center line of pin thread head and pin thread groove and piston rod is on same straight line, the center line of its center line and piston is on same straight line, pin connecting hole is arranged at the top of the outer end of the side through hole that puts in housing of piston rod, the pin center line of connecting hole and the vertical and intersectant centerline of piston rod, and pin connecting hole is between pin thread and piston, and pin thread groove is between pin thread head and pin connecting hole.The many group pincers of swinging reducing oil pipe clamping device equipment many groups slips assembly or equipment tooth assembly, in the time of the many groups of swinging reducing oil pipe clamping device equipment slips assembly, the slips assembly of its equipment comprises slip spider, slip insert, on slip spider, there is the box hole of the pin thread that connects piston rod, box hole is the connecting hole of pin thread, it is circular hole, the center line in box hole of its slip spider and the center line of slip spider are on same straight line, on slip spider, there are two spring pin holes, two spring pin holes lay respectively at the both sides in box hole and communicate with box hole respectively, the center line of two spring pin holes point-blank, the vertical and intersectant centerline in its center line and box hole, on slip spider, there are two locating holes, two locating holes lay respectively at the both sides of the plane at the center line of slip spider and the center line place of two spring pin holes, the center line of two locating holes is on same straight line, its center line is perpendicular to the plane at the center line of slip spider and the center line place of two spring pin holes, in two spring pin holes of slip spider, linking springs pin is installed respectively, slip spider and slip insert interconnect, between slip spider and slip insert, adopt direct fixed connection structure or adopt by the dog screw fixed connection structure of socket cap, in the time adopting direct fixed connection structure between slip spider and slip insert, between slip spider and slip insert, do not pass through other member, slip spider is directly fixedly connected with mutually with slip insert, and slips assembly is as a whole, in the time adopting the dog screw fixed connection structure that passes through socket cap between slip spider and slip insert, slips assembly comprises the dog screw that also comprises socket cap, and there is external screw thread the rear end of the dog screw of socket cap, slip spider has interior arc-shaped structure, interior arc-shaped structure and box hole lay respectively at slip spider pedestal in, outside, on interior arc-shaped structure, there is circular connecting hole, the center line of the circular connecting hole of its slip spider and the center line of slip spider are on same straight line, on slip spider, there is the positioning screw hole of two socket caps, the positioning screw hole of two socket caps lays respectively at the both sides of circular connecting hole and communicates with circular connecting hole respectively, the center line of the positioning screw hole of two socket caps point-blank, the vertical and intersectant centerline of its center line and circular connecting hole, in the positioning screw hole of socket cap, there is internal thread, the center line of the positioning screw hole of two socket caps and the center line of slip spider and two spring pin holes is in same plane, slip insert is circular arc sheet, in its slip insert has, outer two wall side faces, a wall is inner circle arc side face, be referred to as inwall side face, another wall side face is cylindrical arc side face, be referred to as outer wall side face, on its inwall side face, there is locking teeth structure, outwardly circular coupling bar on outer wall side face, locking teeth structure and circular coupling bar lay respectively at slip insert body in, outside, the circular center line of coupling bar and the center line of slip insert are point-blank, there is annular fixed groove the outer end of circular coupling bar, external diameter and the length of circular coupling bar are corresponding identical with internal diameter and the degree of depth of circular connecting hole, the circular coupling bar of its slip insert injects in the circular connecting hole of its slip spider and matches like this, the outer wall side face of slip insert and the inwall side face of the interior arc-shaped structure of slip spider are mutually by connecting, in the positioning screw hole of two socket caps on slip spider, inject respectively the dog screw of socket cap, make to screw and be connected between the external screw thread of rear end of the dog screw of socket cap and the internal thread of the positioning screw hole of socket cap, the front end of the dog screw of socket cap puts in the annular fixed groove of circular coupling bar and is connected with the annular fixed groove of circular coupling bar, make the dog screw of two socket caps clamp and block circular coupling bar, thereby realize the circular coupling bar that is locked, the specification of slips assembly refers to the internal diameter specification of slips assembly, it is the internal diameter specification of the inwall side face of the slip insert of slips assembly.In the time of the many group pincers of swinging reducing oil pipe clamping device equipment tooth assembly, the pincers tooth assembly of its equipment comprises the dog screw of slide block and pincers tooth and socket cap, pincers tooth is by clamping tooth body, tooth body and circular coupling bar form, pincers tooth body is rectangular block, tooth body is by the wall body that clamps the thread form that the extended inwall of tooth body is interior circular arc, on the inwall of tooth body, there is locking teeth structure, the outwardly rectangular block structured fixed block in middle part of one side of pincers tooth body, fixed block runs through the side being connected with fixed block of pincers tooth body, the fixed block of pincers tooth body connects circular coupling bar, tooth body and circular coupling bar lay respectively at pincers tooth body in, outer both sides, the center line of the center line of circular coupling bar and pincers tooth is on same straight line, there is annular fixed groove the outer end of circular coupling bar, slide block is rectangular block structure, one side of slide block middle part have recessed rising as high as the banks, the side at the recessed recessed place of rising as high as the banks of running through slide block of rising as high as the banks, on slide block, there is the circular connecting hole that is connected and fixed pincers tooth, the aperture of circular connecting hole is in recessed groove bottom of rising as high as the banks, the circular center line of connecting hole and the center line of slide block are on same straight line, distance between recessed two groove sides of rising as high as the banks is corresponding identical with the width of the fixed block of pincers tooth body, the recessed degree of depth of rising as high as the banks is corresponding identical with the thickness of the fixed block of pincers tooth body, on slide block, there is the dog screw through hole of two socket caps, the dog screw through hole of two socket caps lays respectively at the both sides of circular connecting hole and communicates with circular connecting hole respectively, the center line of the positioning screw hole of two socket caps point-blank, the vertical and intersectant centerline of its center line and circular connecting hole, in the positioning screw hole of socket cap, there is internal thread, on slide block, there is the box hole of the pin thread that connects piston rod, box hole is the connecting hole of pin thread, it is circular hole, the center line in box hole of its slide block and the center line of slide block are on same straight line, on slide block, there are two spring pin holes, two spring pin holes lay respectively at the both sides in box hole and communicate with box hole respectively, the center line of two spring pin holes point-blank, the vertical and intersectant centerline in its center line and box hole, on slide block, there are two locating holes, two locating holes lay respectively at the both sides of the plane at the center line of circular connecting hole and the center line of the positioning screw hole of two socket caps and the center line place of two spring pin holes, the center line of two locating holes is on same straight line, its center line is perpendicular to the plane at the center line of circular connecting hole and the center line of the positioning screw hole of two socket caps and the center line place of two spring pin holes, in two spring pin holes on slide block, linking springs pin is installed respectively, external diameter and the length of circular coupling bar are corresponding identical with internal diameter and the degree of depth of circular connecting hole, circular coupling bar of its pincers tooth injects in the circular connecting hole of its slide block and matches like this, the fixed block of pincers tooth body sandwich slide block a side recessed the rising as high as the banks at middle part in match, in the positioning screw hole of two socket caps of slide block, inject respectively the dog screw of socket cap, make to screw and be connected between the external screw thread of rear end of the dog screw of socket cap and the internal thread of the positioning screw hole of socket cap, the front end of the dog screw of socket cap puts in the annular fixed groove of circular coupling bar and is connected with the annular fixed groove of circular coupling bar, make the dog screw of socket cap clamp and block circular coupling bar, thereby realize be locked circular coupling bar and pincers tooth, the specification of pincers tooth assembly refers to clamp the internal diameter specification of tooth assembly, clamp the internal diameter specification of the inwall of the interior circular arc of the wall body of the extended thread form of pincers tooth body of tooth assembly.Like this, piston rod packs in the hole in the middle of side door, on piston rod, connect positioning sliding block, on positioning sliding block, there is piston rod connecting through hole, its piston rod connecting through hole longitudinally penetrates positioning sliding block body, the center line of piston rod connecting through hole and the center line of positioning sliding block are on same straight line, on positioning sliding block, there is the dog screw through hole of two socket caps, the dog screw through hole of two socket cap lays respectively at the both sides of piston rod connecting through hole and communicates with piston rod connecting through hole, in the dog screw through hole of socket cap, it is internal thread, the center line of the dog screw through hole of socket cap and the vertical and intersectant centerline of piston rod connecting through hole, in the dog screw through hole of socket cap, install and connect dog screw, the front end of dog screw puts in the pin connecting hole of piston rod, the external screw thread of dog screw rear end screws and is connected with the dog screw through hole internal thread of socket cap, positioning sliding block is fixedly connected on piston rod, piston and piston rod are inserted in cylinder barrel, internal thread in the blind hole of the connection wire rod of the male thread on the leading portion of the body of screw mandrel and the central through hole of piston and the piston rod that links together screws and is connected, cylinder cap sealing shroud connects the back segment of the body of screw mandrel, the sealing device of hydraulic cylinder comprises the sealing between the sealing between the back segment of body of cylinder cap and screw mandrel and sealing and side door and the cylinder barrel between cylinder cap and cylinder barrel, sealing between piston rod and side door, sealing between piston rod and side door is divided into two parts, a part is that sealed well is pressed, a part is the oil pressure that sealing hydraulic control produces, twice sealing mechanism is between Zhe Liang department, for making the sealing at this place very reliable, there is the sealing ring of multiplet, and the auxiliary seal of middle O-ring seals, side door itself is connected with housing by side door bolt, side door is positioned at the side through hole outside of housing, cylinder cap and cylinder barrel are fixed together by cylinder barrel bolt and side door, and piston rod and positioning sliding block put in the side through hole of housing, and the sealing between side door and cylinder barrel adopts y-shaped ring to realize two way seal, the sealing mechanism of swinging reducing oil pipe clamping device comprises sealing and the sealing of oil circuit and the sealing of housing and case lid between sealing device and side door and the housing of hydraulic cylinder, in the body of housing, there are two oil circuit holes, one oil circuit hole collar extension is positioned at outside, housing front, internal orifice is two, it lays respectively at the outside of housing two side through hole, oil circuit hole two internal orifices respectively identical with the specification in the oil circuit aperture of its corresponding connected side door, link position is corresponding, the oil circuit hole collar extension of its housing is fixedly connected with port connection, its another oil circuit hole collar extension is also positioned at outside, housing front, internal orifice is two, it lays respectively at the outside of housing two side through hole, oil circuit hole two internal orifices respectively identical with the specification in the oil circuit aperture of its corresponding connected side door, link position is corresponding, the oil circuit hole collar extension of its housing is fixedly connected with port connection, in cylinder cap body, have an oil circuit hole, cylinder cap body is pierced into from the cylinder cap inner side all sides that are connected corresponding to cylinder barrel in its oil circuit hole, and passes in the middle of cylinder cap inner side, cylinder barrel has an oil circuit hole, the one oil circuit orifice sealing in all side oil circuit apertures in cylinder cap oil circuit hole and the oil circuit hole of cylinder barrel joins, oil circuit aperture in cylinder cap in the middle of the inner side in oil circuit hole is led in cylinder barrel, in its side door, there are two oil circuit holes of crossing side door, the two oil circuit apertures in an oil circuit hole of side door are connected with another oil circuit aperture in the oil circuit hole of cylinder barrel and the oil circuit orifice sealing of housing respectively, and another oil circuit hole sealing of another oil circuit hole of side door and housing interlinks and leads in cylinder barrel.Its each parts are successively installed and have been connected according to program respectively, all have rubber seal to connect between each interface in oil circuit hole, and it forms the oil circuit of independent completion sealing.Sealing and the oil circuit hole external tapping of port connection and housing and the sealing of housing between the each interface in hole, sealed packet oil scraper road of oil circuit; The left and right symmetry of structure of swinging reducing oil pipe clamping device, connects respectively piston rod and positioning sliding block in the left and right side through hole of housing.Rotating disk is cirque structure, the central through hole of rotating disk is vertical circular hole, the center line of the central through hole of rotating disk and the center line of rotating disk are on same straight line, on the body of the rotating disk in the outside of the central through hole of rotating disk, there are multiple side through hole, the body of rotating disk is the wall body of rotating disk, its side through hole is cross through hole, side through hole communicates with central through hole, side through hole is on the outer wall of rotating disk, it is the wall body of side through hole lateral penetration rotating disk, the center line of side through hole and the vertical and intersectant centerline of rotating disk, multiple side through hole are uniformly distributed on the wall body of rotating disk, be that the crossing angle of the center line of each two adjacent side through hole is identical, multiple side through hole on rotating disk are arranged in pairs, two relative side through hole form a pair of side through hole, its same to the center line of two of side through hole side through hole on same straight line, form the structure of multipair side through hole, the center line of multiple side through hole at grade, its side through hole connects respectively two relative spring pin holes, be connected in the center line of two the relative spring pin holes on the through hole of the same side on same straight line, the center line of two spring pin hole is parallel with the center line of rotating disk, and with the side through hole vertical and intersectant centerline that is connected two spring pin hole, two spring pin holes communicate with side through hole respectively, and the aperture of an one spring pin hole is positioned on a side of rotating disk, and the aperture of another spring pin hole is positioned on the another side of rotating disk, in two spring pin holes, linking springs pin is installed respectively, on the wall body of rotating disk, there are multiple locating holes, the aperture of locating hole be positioned at rotating disk the perisporium of wall body on, the center line of locating hole and the vertical and intersectant centerline of rotating disk, the center line of each locating hole on the wall body of rotating disk at grade, locating hole on rotating disk is corresponding with the side through hole on rotating disk, quantity is identical, multiple locating holes be uniformly distributed in rotating disk wall body on, be that the crossing angle of the center line of each two adjacent locating holes is identical, its crossing angle angle crossing with the center line of adjacent two side through hole is identical, multiple locating holes on rotating disk are arranged in pairs, two relative locating holes form a pair of locating hole, its center line with two locating holes of a pair of locating hole is on same straight line, form the structure of multipair locating hole, on the perisporium of the wall body of one side of the side through hole of rotating disk, be machined into driven gear, this side is referred to as the outside of rotating disk, one side of the adjacent driven gear of rotating disk is referred to as the lateral surface of rotating disk, the another side of rotating disk is referred to as medial surface, the center line of driven gear and the center line of rotating disk are on same straight line, on inside and outside two sides of rotating disk, there is respectively the annular groove around central through hole, two annular groove specification is identical, the center line of two annular grooves is on same straight line, and the center line of its center line and rotating disk is on same straight line, on the perisporium of the wall body of the opposite side of the side through hole of rotating disk, there is the side ring connected in star around central through hole, the center line of its side ring connected in star and the center line of rotating disk are on same straight line, in each side through hole of rotating disk, install respectively and connect slips assembly or pincers tooth assembly, be that slips assembly or pincers tooth assembly are installed and connected in the side through hole of rotating disk, slips assembly in the side through hole of rotating disk or pincers tooth assembly are arranged in pairs, two relative slips assemblies or two relative pincers tooth assemblies form a pair of slips assembly or a pair of pincers tooth assembly, it is one group of slips assembly or one group of pincers tooth assembly with a pair of slips assembly or with a pair of pincers tooth assembly, slips assembly or pincers tooth assembly are put in the side through hole of rotating disk, the outer wall of the pincers tooth slide block of the outer wall of the slip spider of its slips assembly or pincers tooth assembly coordinates the inwall of side through hole, the box hole of the slide block of the box hole of the slip spider of slips assembly or pincers tooth assembly is towards rotating disk outside.Rotating disk is installed and connected in the main through hole of housing, in rotating disk, side ring connected in star on annular groove on outer two sides and the perisporium of rotating disk is installed respectively some steel balls, tangent the leaning on of inner bottom surface at the bottom of the steel ball that annular groove on face connects and the annular of housing, in the annular groove of its a part of spheroid of steel ball on medial surface that the side ring connected in star of the perisporium of rotating disk connects, the steel ball of side ring connected in star connection of the perisporium of rotating disk and the main through hole internal perisporium of housing are mutually by connecting, in the annular groove of its a part of spheroid of steel ball on lateral surface that annular groove on the lateral surface of rotating disk connects, tangent the leaning on of annular medial surface of the steel ball that the annular groove on the lateral surface of rotating disk connects and the step of case lid, case lid is fixedly connected with housing, be fastenedly connected case lid and housing with bolt by the connecting through hole of case lid and the connection blind hole of housing, make rotating disk and housing location, be that the center line of rotating disk and the center line of housing are on same straight line, the center line of the side through hole of housing is in the plane at the place of the center line of multiple side through hole of rotating disk, slips assembly or pincers tooth assembly and piston rod location, be the center line in box hole of the slip spider of each slips assembly or the slide block of each pincers tooth assembly box hole center line at grade, the center line in box hole and the vertical and intersectant centerline of housing of the slide block of the center line in the box hole of the slip spider of its slips assembly or pincers tooth assembly, the center line of piston rod is in the plane at the place of the center line in the box hole of the center line in the box hole of the slip spider of each slips assembly or the slide block of each pincers tooth assembly, the fixing center line of slide block and the center line of piston rod are on same straight line, piston rod and slips assembly or pincers tooth assembly location also comprise, when in the locating hole of the pin jacking rotating disk of the spring catch on housing, behind its rotating disk location, there are a pair of slips assembly or pincers tooth assembly to be positioned at two piston rod middles, a pair of slips assembly or pincers tooth assembly in place when this becomes rotating disk location to slips assembly or pincers tooth assembly, the center line in box hole of the slide block of the box hole of the slip spider of its a pair of slips assembly in place or a pair of pincers tooth assembly and the center line of two piston rods are on same straight line, the center line of two spring pin holes of its correspondence on the both sides rotating disk of the center line of two locating holes of slip spider or two locating holes of slide block and slips assembly or pincers tooth assembly and the center line of rotating disk are at grade, in the plane at the center line place of each locating hole of the center line of the spring catch on housing on rotating disk perisporium.Transmission device comprises driving gear and driven gear; The tooth of driving gear put in the main through hole of housing and with mutual meshing connection of tooth of driven gear on rotating disk, the center line of driving gear is parallel with the center line of housing, the head of the axle of driving gear exposes housing, the head of its axle pierces in the side through hole of case lid.Positioner comprises spring catch on housing and locating hole on corresponding rotating disk perisporium, be installed and connected in spring catch in the spring catch through hole on rotating disk and the corresponding locating hole of slip spider or the locating hole of slide block, be installed and connected in positioning sliding block on groove, the piston rod of spring catch in the spring catch in the spring catch through hole on slip spider or the spring catch through hole on slide block and piston rod pin thread and the side through hole of rotating disk; The specification of the pincers tooth assembly that its slips assembly specification of same group is identical or same group is identical, the specification of the pincers tooth assembly of not identical or different group of slips assembly specification is on the same group not identical, its each group slips assembly or pincers tooth assembly arrange respectively corresponding and the oil pipe of the different size specification of mating that adapts, like this, respectively organize slips assembly or respectively organize pincers tooth assembly and mate separately the oil pipe that it adapts to specification.On the shell of the spring catch on its housing, there is latch through hole, the center line of its latch through hole is vertical with the center line of shell, the pin of the spring catch on housing has latch connecting hole, the center line of its latch connecting hole is vertical with the center line of the pin of spring catch, be equipped with latch, when the pin of spring catch is by spring pressure stretch and while putting in the locating hole of rotating disk completely, latch is injected in the latch connecting hole of pin of latch through hole on the shell of spring catch and spring catch, make between the shell of its spring catch and the pin of spring catch fixing.The head of the axle of driving gear protrudes from outside case lid, in case lid, install and connect dial, it is placed on the head of the axle of driving gear, on dial, be carved with the numeral of the plurality of specifications of slips assembly that swinging reducing oil pipe clamping device equips or pincers tooth assembly, the head of its axle is installed and is connected pointer, by pointer and dial, to show one group of slips assembly that whether slips assembly or pincers tooth assembly be in place and in place or the specification of pincers tooth assembly.The be tightly connected hydraulic oil pipeline of hydraulic system of port connection.In the whole course of work of swinging reducing oil pipe clamping device, swinging reducing oil pipe clamping device has four positioning states, it is the location of rotating disk, the secondary location of the positioning sliding block of piston rod, being located by connecting of piston rod and slips assembly or pincers tooth assembly, the location of rotating disk and slips assembly or pincers tooth assembly, in the whole impulse stroke of piston, first move ahead in process at piston, piston rod head stretches out the side through hole of housing together with a part for positioning sliding block, positioning sliding block is connected in the side through hole of housing and the side through hole of rotating disk, thereby realize slips assembly or pincers tooth assembly in working order under location for the second time, simultaneously piston rod head puts in the box hole of slip spider of slips assembly or clamps in the box hole of slide block of tooth assembly, the pin clinching of the spring catch on the slip spider of slips assembly enter in the annular groove of piston rod head or the slide block of pincers tooth assembly the pin clinching of spring catch enter in the annular groove of piston rod head, realize being located by connecting of piston rod and slips assembly or pincers tooth assembly, in piston retraction process, the pin clinching of the spring catch of rotating disk enters in the locating hole on the slip spider of slips assembly or the pin clinching of the spring catch of rotating disk enters to clamp in the locating hole of slide block of tooth assembly, realize the location of rotating disk and slips assembly or pincers tooth assembly, simultaneously, piston rod separates with slips assembly or pincers tooth assembly, and piston rod head is retracted in the side through hole of housing together with positioning sliding block.Duty in the time that the course of work of swinging reducing oil pipe clamping device comprises dial rotation, duty when swinging reducing oil pipe clamping device loosens, duty when swinging reducing oil pipe clamping device clamps, when duty in the time of dial rotation or in the time that swinging reducing oil pipe clamping device loosens, its piston rod head is retracted into together with positioning sliding block in the side through hole of housing, piston rod separates with rotating disk, the pin of each spring catch on rotating disk respectively corresponding clinching enter pin that each spring catch in the locating hole on the slip spider of slips assembly or on rotating disk presses respectively corresponding clinching enter to clamp in the locating hole of slide block of tooth assembly, each slips assembly or each pincers tooth assembly are positioned respectively in each corresponding side through hole of rotating disk, when duty in the time that swinging reducing oil pipe clamping device clamps, the pin of the spring catch on its housing is also put in a locating hole of rotating disk completely by spring pressure stretch, piston rod head stretches out the side through hole of housing together with a part for positioning sliding block, it puts in the side through hole of rotating disk, positioning sliding block is connected in the side through hole of housing and the side through hole of rotating disk, simultaneously piston rod head put in the box hole of slip spider of one group of slips assembly in place or the box hole of one group of slide block that clamps tooth assembly in place in, the pin clinching of the spring catch on the slip spider of its slips assembly enter in the annular groove of piston rod head or the slide block of pincers tooth assembly the pin clinching of spring catch enter in the annular groove of piston rod head, and other slips assembly or pincers tooth assembly are positioned respectively in each corresponding side through hole of rotating disk.Swinging reducing oil pipe clamping device adopts hydraulic-driven, in the time that hydraulic control system hydraulic oil enters left and right cylinder barrel and closes chamber, promoting piston driving one group of left and right slips assembly or one group of pincers tooth assembly in place in place moves to well head center respectively along case side through hole, realize and clamp oil pipe, in the time that hydraulic oil enters cylinder barrel unlatching chamber, left and right, promote piston driving one group of left and right slips assembly in place or clamp tooth assembly to leaving the motion of well head center position, unclamp oil pipe, the switch of slips assembly or pincers tooth assembly is by the reversal valve control of hydraulic system.Swinging reducing oil pipe clamping device is equipped with handgrip, there is outer-hexagonal structure one end of handgrip, the interior hexagonal structure of the specification of outer-hexagonal structure of its handgrip and the head of the axle of driving gear matches, thereby matches in the time that the outer-hexagonal structure of handgrip is inserted in the interior hexagonal structure of head of the axle of driving gear, like this, swinging reducing oil pipe clamping device is installed in the apparatus for work of oil and gas wellhead lower oil tube, in the time that the external diameter of the oil pipe removing changes, use handle rotation driving gear, make dial rotation, change one group of slips assembly or one group of pincers tooth assembly in place, choice for use and the external diameter specification of the oil pipe of required clamping one group of slips assembly mating or choice for use and the external diameter specification of the oil pipe of the required clamping one group of pincers tooth assembly mating that adapts that adapts, and make and the adapt one group of slips assembly use in place of mating or make and the one group of pincers tooth assembly use in place of mating that adapts of the external diameter specification of the oil pipe of required clamping of the external diameter specification of the oil pipe of required clamping, thereby adapt to external diameter the oil pipe changing has occurred, thereby reach object of the present invention.

Owing to having adopted technique scheme, not only it has overcome the defect of one group of slips assembly of equipment in hydraulic oil pipe binding clasp to swinging reducing oil pipe clamping device, the slips assembly of the many groups of swinging reducing oil pipe clamping device equipment different inner diameters specification or the pincers tooth assembly of the many groups of equipment different inner diameters specification, according to the external diameter specification of the oil pipe of required clamping, by revolution rotating disk, choice for use and the external diameter specification of the oil pipe of required clamping one group of slips assembly mating or choice for use and the external diameter specification of the oil pipe of the required clamping one group of pincers tooth assembly mating that adapts that adapts, and make and the adapt one group of slips assembly use in place of mating or make and the one group of pincers tooth assembly use in place of mating that adapts of the external diameter specification of the oil pipe of required clamping of the external diameter specification of the oil pipe of required clamping, thereby adapt to the variation of the external diameter specification of required clamping oil pipe, save the working time, save and change the trouble that slip insert or slips assembly or pincers tooth assembly bring, greatly improve workman's labor productivity, stop to produce new potential safety hazard, and simple in structure, easy to operate.

Brief description of the drawings

Below in conjunction with embodiment, swinging reducing oil pipe clamping device of the present invention is further described.

The example structure schematic diagram that accompanying drawing 1 is swinging reducing oil pipe clamping device of the present invention.

The example structure explosion views that accompanying drawing 2 is swinging reducing oil pipe clamping device of the present invention.

In figure: 1. cylinder cap, 2. screw mandrel, 3. cylinder barrel, 4. piston, 5. side door, 6. positioning sliding block, 7. the pin connecting hole of piston rod, 8. housing, 9. the pin thread groove of piston rod, 10. slide block, 11. steel balls, center hole at the bottom of the annular of the body of 12. housings, the spring catch being connected is installed in the spring pin hole communicating with side through hole on outside flange arrangement 14. rotating disks at the bottom of the annular of the body of 13. housings, 15. case lid, 16. pincers tooth bodies, the flange arrangement of 17. case lid, the tooth body of 18. pincers teeth, 19. lassos, the head of the interior hexagonal configuration of the axle of 20. driving gears, the middle part of the cube structure of the axle of 21. driving gears, the toothed disc of 22. driving gears, the afterbody of the cylindrical structural of the axle of 23. driving gears, 24. cylinder barrel bolts, 25. side door bolts, the spring catch connecting is installed in the spring pin hole on 26. slide blocks, connecting thread blind hole on its body of the outer circumferential side of the outer end of the main through hole of 27. housings, side through hole on 28. rotating disks, locating hole on 29. rotating disks, the spring pin hole communicating with side through hole on 30. rotating disks, 31. pincers tooth assemblies, the spring catch connecting through hole of 32. housings is installed the spring catch connecting, 33. pointers, 34. oil pipes, 35. are connected in the dog screw in the pin connecting hole of piston rod, 36. rotating disks

Detailed description of the invention

In figure: swinging reducing oil pipe clamping device is the utensil of the clamping oil pipe that uses in oil gas field shaft mouth operation, and it adopts hydraulic-driven.Swinging reducing oil pipe clamping device comprises shell, hydraulic cylinder, slips assembly or pincers tooth assembly, side door, side door bolt, rotating disk, transmission device, positioner and steel ball, port connection, and swinging reducing oil pipe clamping device also comprises sealing mechanism.Swinging reducing oil pipe clamping device is symmetrical structure, and its left side structure is identical and symmetrical with the specification framework of right side structure.Its shell comprises housing (8), the fastening structure of case lid (15) and case lid and housing, Hermetical connecting structure, housing comprises body and flange arrangement, body is rectangular structure, the center of body is the main through hole of hollow circular configuration, the center line of main through hole and the center line of housing are on same straight line, inside chime rings shape structure on the internal perisporium of one end of main through hole, at the bottom of it is the annular of body, the center line of center hole (12) at the bottom of the annular of body and the center line of housing are on same straight line, inner face at the bottom of the annular of body is the plane of cirque structure, the other end of main through hole is referred to as outer end, on all its bodies of side in outer end, there is driving gear installing hole, driving gear installing hole on housing comprises counterbore and axis hole, side channel, counterbore is circular hole, the internal diameter of counterbore is greater than the internal diameter of axis hole, between counterbore internal perisporium and the internal perisporium of axis hole, form a ledge structure, the center line of counterbore and axis hole is on same straight line, on the perisporium of axis hole, have and be communicated with the main through hole of body and the side channel of axis hole, the center line of body is respectively perpendicular to two relative groove sides of side channel, driving gear is installed and connected on housing by the driving gear installing hole of housing, driving gear comprises toothed disc (22) and axle, connection teeth wheel disc is installed in side channel, there is axle connecting through hole the centre of toothed disc, axle connecting through hole is square hole, the axle of driving gear is made up of four parts, be columniform head (20), on the top of its head, there is interior hexagonal structure, the afterbody (23) of cylindrical structural, the middle part (21) of cube structure, is connected in the cylindrical structural that its external diameter between head and middle part is greater than the external diameter of head, axle sleeve enters in the axle connecting through hole of toothed disc, the afterbody of axle puts in the axis hole being inserted on housing, the middle part of axle is enclosed within the axle connecting through hole of centre of toothed disc, on axle, overlap connected set circle (19), lasso is circular ring structure, the cylindrical structural being connected between head and middle part of the axle of driving gear overlaps connected set circle, lasso is inserted in the counterbore of driving gear installing hole of housing, lasso respectively and the counterbore of driving gear installing hole of housing and the cylindrical structural being connected between head and middle part of the axle of driving gear be tightly connected, uniform multiple connection blind holes (27) on its body of the outer circumferential side of the outer end of main through hole, are internal thread in its blind hole, and the center line of blind hole is parallel with the center line of housing, body has two side through hole, and two side through hole communicate with main through hole respectively, and a side through hole is positioned at main through hole one side, and another side through hole is positioned at main through hole opposite side, the center line of two side through hole on same straight line and with the vertical and intersectant centerline of main through hole, outside at the bottom of the annular of body is flange arrangement (13), the center line of flange arrangement and the center line of main through hole are on same straight line, middle circular hole at the bottom of the intermediate throughholes of flange arrangement and the annular of body interlinks, and has annular groove on the lateral surface of flange arrangement, on housing, there is spring catch connecting through hole, spring catch connecting through hole is installed linking springs pin (32), spring catch connecting through hole is positioned at the perisporium of housing and penetrates the perisporium of housing, the center line of spring catch connecting through hole and the vertical and intersectant centerline of housing, spring catch is fixedly connected on housing by the spring catch connecting through hole of housing, spring catch is connected with housing seal, comprise two parts, the one, being tightly connected of the spring catch connecting through hole of the shell of spring catch and housing, the one, being tightly connected of the spring catch connecting through hole of the pin of spring catch and housing, the pin of spring catch stretches in the main through hole of housing, case lid (15) comprises covers body, step, flange arrangement, side through hole, connecting through hole, lid body is cirque structure, in the middle of lid body, it is round tube hole, the step that one side of lid body is outwardly cirque structure, round tube hole in the middle of step interlinks with the round tube hole in the middle of lid body, the opposite side of lid body is flange arrangement (17), the through hole of the centre of flange arrangement interlinks with the round tube hole of the centre of lid body, step and lid body, the center line of flange arrangement is on same straight line, on the lateral surface of flange arrangement, there is annular groove, all sides of the round tube hole of the centre of lid body have a side through hole, the internal diameter of side through hole equals the external diameter of the head of the axle of driving gear, all sides of the round tube hole of the centre of lid body are uniformly distributed multiple connecting through holes.Hydraulic cylinder comprises cylinder barrel (3) and cylinder cap (1), piston (4) and piston rod, screw mandrel (2), cylinder barrel bolt (24) and sealing device, piston rod is fixedly connected on a side of piston, on piston rod, there is the blind hole of connection wire rod, the blind hole of connection wire rod and the central through hole of piston interlink, the blind hole of connection wire rod and the central through hole of piston and piston rod, the center line of piston is on same straight line, in the blind hole of the central through hole of piston and the connection wire rod linking together, there is internal thread, screw mandrel comprises body and step, body is circular pin, the step of the outwardly annular of intermediate peripheral wall of body, its step separates leading portion and back segment the body of screw mandrel, the external diameter of leading portion is less than the external diameter of back segment, on the leading portion of body, there is male thread, the top of the outer end of piston rod comprises pin thread and the pin connecting hole (7) of head, pin thread comprises pin thread head and pin thread groove (9), the annular groove of the center line around piston that pin thread groove is concaved out by the head perisporium of piston rod, the center line of pin thread head and pin thread groove and piston rod is on same straight line, the center line of its center line and piston is on same straight line, pin connecting hole is arranged at the top of the outer end of the side through hole that puts in housing of piston rod, the pin center line of connecting hole and the vertical and intersectant centerline of piston rod, and pin connecting hole is between pin thread and piston, and pin thread groove is between pin thread head and pin connecting hole.Swinging reducing oil pipe clamping device is equipped three groups of pincers tooth assemblies, pincers tooth assemblies (31) comprise the dog screw of slide block (10) and pincers tooth and socket cap, pincers tooth is by clamping tooth body (16), tooth body (18) and circular coupling bar form, pincers tooth body is rectangular block, tooth body is by the wall body that clamps the thread form that the extended inwall of tooth body is interior circular arc, on the inwall of tooth body, there is locking teeth structure, the outwardly rectangular block structured fixed block in middle part of one side of pincers tooth body, fixed block runs through the side being connected with fixed block of pincers tooth body, the fixed block of pincers tooth body connects circular coupling bar, tooth body and circular coupling bar lay respectively at pincers tooth body in, outer both sides, the center line of the center line of circular coupling bar and pincers tooth is on same straight line, there is annular fixed groove the outer end of circular coupling bar, slide block is rectangular block structure, one side of slide block middle part have recessed rising as high as the banks, the side at the recessed recessed place of rising as high as the banks of running through slide block of rising as high as the banks, on slide block, there is the circular connecting hole that is connected and fixed pincers tooth, the aperture of circular connecting hole is in recessed groove bottom of rising as high as the banks, the circular center line of connecting hole and the center line of slide block are on same straight line, distance between recessed two groove sides of rising as high as the banks is corresponding identical with the width of the fixed block of pincers tooth body, the recessed degree of depth of rising as high as the banks is corresponding identical with the thickness of the fixed block of pincers tooth body, on slide block, there is the dog screw through hole of two socket caps, the dog screw through hole of two socket caps lays respectively at the both sides of circular connecting hole and communicates with circular connecting hole respectively, the center line of the positioning screw hole of two socket caps point-blank, the vertical and intersectant centerline of its center line and circular connecting hole, in the positioning screw hole of socket cap, there is internal thread, on slide block, there is the box hole of the pin thread that connects piston rod, box hole is the connecting hole of pin thread, it is circular hole, the center line in box hole of its slide block and the center line of slide block are on same straight line, on slide block, there are two spring pin holes, two spring pin holes lay respectively at the both sides in box hole and communicate with box hole respectively, the center line of two spring pin holes point-blank, the vertical and intersectant centerline in its center line and box hole, on slide block, there are two locating holes, two locating holes lay respectively at the both sides of the plane at the center line of circular connecting hole and the center line of the positioning screw hole of two socket caps and the center line place of two spring pin holes, the center line of two locating holes is on same straight line, its center line is perpendicular to the plane at the center line of circular connecting hole and the center line of the positioning screw hole of two socket caps and the center line place of two spring pin holes, linking springs pin (26) is installed respectively in two spring pin holes on slide block, external diameter and the length of circular coupling bar are corresponding identical with internal diameter and the degree of depth of circular connecting hole, circular coupling bar of its pincers tooth injects in the circular connecting hole of its slide block and matches like this, the fixed block of pincers tooth body sandwich slide block a side recessed the rising as high as the banks at middle part in match, in the positioning screw hole of two socket caps of slide block, inject respectively the dog screw of socket cap, make to screw and be connected between the external screw thread of rear end of the dog screw of socket cap and the internal thread of the positioning screw hole of socket cap, the front end of the dog screw of socket cap puts in the annular fixed groove of circular coupling bar and is connected with the annular fixed groove of circular coupling bar, make the dog screw of socket cap clamp and block circular coupling bar, thereby realize the circular coupling bar that is locked, the specification of pincers tooth assembly refers to clamp the internal diameter specification of tooth assembly, clamp the internal diameter specification of the inwall of the interior circular arc of the wall body of the extended thread form of pincers tooth body of tooth assembly.Like this, piston rod is put in the hole in the middle of side door (5), on piston rod, connect positioning sliding block (6), on positioning sliding block, there is piston rod connecting through hole, its piston rod connecting through hole longitudinally penetrates positioning sliding block body, the center line of piston rod connecting through hole and the center line of positioning sliding block are on same straight line, on positioning sliding block, there is the dog screw through hole of two socket caps, the dog screw through hole of two socket cap lays respectively at the both sides of piston rod connecting through hole and communicates with piston rod connecting hole, in the dog screw through hole of socket cap, it is internal thread, the center line of the dog screw through hole of socket cap and the vertical and intersectant centerline of piston rod connecting through hole, in the dog screw through hole of socket cap, install and connect dog screw (35), the front end of dog screw puts in the pin connecting hole of piston rod, the external screw thread of dog screw rear end screws and is connected with the dog screw through hole internal thread of socket cap, positioning sliding block is fixedly connected on piston rod, piston and piston rod are inserted in cylinder barrel, internal thread in the blind hole of the connection wire rod of the male thread on the leading portion of the body of screw mandrel and the central through hole of piston and the piston rod that links together screws and is connected, cylinder cap sealing shroud connects the back segment of the body of screw mandrel, the sealing device of hydraulic cylinder comprises the sealing between the sealing between the back segment of body of cylinder cap and screw mandrel and sealing and side door and the cylinder barrel between cylinder cap and cylinder barrel, sealing between piston rod and side door, sealing between piston rod and side door is divided into two parts, a part is that sealed well is pressed, a part is the oil pressure that sealing hydraulic control produces, twice sealing mechanism is between Zhe Liang department, for making the sealing at this place very reliable, there is the sealing ring of multiplet, and the auxiliary seal of middle O-ring seals, side door itself is connected with housing by side door bolt (25), side door is positioned at the side through hole outside of housing, cylinder cap and cylinder barrel are fixed together by cylinder barrel bolt and side door, piston rod and positioning sliding block put in the side through hole of housing, and the sealing between side door and cylinder barrel adopts y-shaped ring to realize two way seal, the sealing mechanism of swinging reducing oil pipe clamping device comprises sealing and the sealing of oil circuit and the sealing of housing and case lid between sealing device and side door and the housing of hydraulic cylinder, in the body of housing, there are two oil circuit holes, one oil circuit hole collar extension of its housing is positioned at outside, housing front, internal orifice is two, it lays respectively at the outside of housing two side through hole, oil circuit hole two internal orifices respectively identical with the specification in the oil circuit aperture of its corresponding connected side door, link position is corresponding, its oil circuit hole collar extension is fixedly connected with port connection, another oil circuit hole collar extension of its housing is also positioned at outside, housing front, internal orifice is two, it lays respectively at the outside of housing two side through hole, oil circuit hole two internal orifices respectively identical with the specification in the oil circuit aperture of its corresponding connected side door, link position is corresponding, its oil circuit hole collar extension is fixedly connected with port connection, in cylinder cap body, have an oil circuit hole, cylinder cap body is pierced into from the cylinder cap inner side all sides that are connected corresponding to cylinder barrel in its oil circuit hole, and passes in the middle of cylinder cap inner side, cylinder barrel has an oil circuit hole, the one oil circuit orifice sealing in all side oil circuit apertures in cylinder cap oil circuit hole and the oil circuit hole of cylinder barrel joins, oil circuit aperture in the middle of the inner side in cylinder cap oil circuit hole is led in cylinder barrel, its side door has two oil circuit holes of crossing side door, the two oil circuit apertures in an oil circuit hole of side door interlink with another oil circuit hole in oil circuit hole and the sealing of the oil circuit hole of housing of cylinder barrel respectively, and another oil circuit hole sealing of another oil circuit hole of side door and housing interlinks and leads in cylinder barrel.Its each parts are successively installed and have been connected according to program respectively, all have rubber seal to connect between each interface in oil circuit hole, and it forms the oil circuit of independent completion sealing.The sealing of the sealing between the each interface in hole, sealed packet oil scraper road of oil circuit and the oil circuit hole collar extension of port connection and housing; The left and right symmetry of structure of swinging reducing oil pipe clamping device, connects respectively piston rod and positioning sliding block in the left and right side through hole of housing.Rotating disk (36) is cirque structure, the central through hole of rotating disk is vertical circular hole, the center line of the central through hole of rotating disk and the center line of rotating disk are on same straight line, on the body of the rotating disk in the outside of the central through hole of rotating disk, there are six side through hole, the body of rotating disk is the wall body of rotating disk, its side through hole (28) is cross through hole, side through hole communicates with central through hole, side through hole is on the wall body of rotating disk, it is the wall body of side through hole lateral penetration rotating disk, the center line of side through hole and the vertical and intersectant centerline of rotating disk, six side through hole are uniformly distributed on the wall body of rotating disk, be that the crossing angle of the center line of each two adjacent side through hole is identical, six side through hole on rotating disk are arranged in pairs, two relative side through hole form a pair of side through hole, its same to the center line of two of side through hole side through hole on same straight line, form the structure of three pairs of side through hole, the center line of six side through hole at grade, its side through hole connects respectively two relative spring pin holes, be connected in the center line of two the relative spring pin holes on the through hole of the same side on same straight line, the center line of two spring pin hole is parallel with the center line of rotating disk, and with the vertical and intersectant centerline of side through hole that is connected two spring pin hole, two spring pin holes communicate with side through hole respectively, the aperture of an one spring pin hole (30) is positioned on a side of rotating disk, the aperture of another spring pin hole is positioned on the another side of rotating disk, and linking springs pin (14) is installed respectively in two spring pin holes, rotating disk wall body on have six locating holes, the aperture of locating hole (29) be positioned at rotating disk the perisporium of wall body on, the center line of locating hole and the vertical and intersectant centerline of rotating disk, the center line of each locating hole on the perisporium of the wall body of rotating disk at grade, locating hole on rotating disk is corresponding with the side through hole on rotating disk, quantity is identical, six locating holes are uniformly distributed on the wall body of rotating disk, be that the crossing angle of the center line of each two adjacent locating holes is identical, its crossing angle angle crossing with the center line of adjacent two side through hole is identical, six locating holes on rotating disk are arranged in pairs, two relative locating holes form a pair of locating hole, its center line with two locating holes of a pair of locating hole is on same straight line, form the structure of three pairs of locating holes, on the perisporium of one sidewall bodies of the side through hole of rotating disk, be machined into driven gear, this side is referred to as the outside of rotating disk, one side of the adjacent driven gear of rotating disk is referred to as the lateral surface of rotating disk, the another side of rotating disk is referred to as medial surface, the center line of driven gear and the center line of rotating disk are on same straight line, on inside and outside two sides of rotating disk, there is respectively the annular groove around central through hole, two annular groove specification is identical, the center line of two annular grooves is on same straight line, and the center line of its center line and rotating disk is on same straight line, on the perisporium of the wall body of the opposite side of the side through hole of rotating disk, there is the side ring connected in star around central through hole, the center line of its side ring connected in star and the center line of rotating disk are on same straight line, connecting clamp tooth assembly is installed respectively in each side through hole of rotating disk, clamping tooth assembly is installed and connected in the side through hole of rotating disk, pincers tooth assembly is put in the side through hole of rotating disk, pincers tooth assembly in the side through hole of rotating disk is arranged in pairs, two relative pincers tooth assemblies form a pair of pincers tooth assembly, and it is one group of pincers tooth assembly with a pair of pincers tooth assembly, the outer wall of the pincers tooth slide block of its pincers tooth assembly coordinates the inwall of side through hole, and the box hole of the slide block of pincers tooth assembly is towards rotating disk outside.Rotating disk is installed and connected in the main through hole of housing, in rotating disk, side ring connected in star on annular groove on outer two sides and the perisporium of rotating disk is installed respectively and is connected some steel balls, in the annular groove of its a part of spheroid of steel ball on medial surface that annular groove on the medial surface of rotating disk connects, tangent the leaning on of inner bottom surface at the bottom of the steel ball (11) that annular groove on the medial surface of rotating disk connects and the annular of housing, in the annular groove of its a part of spheroid of steel ball on medial surface that the side ring connected in star of the perisporium of rotating disk connects, the steel ball of side ring connected in star connection of the perisporium of rotating disk and the main through hole internal perisporium of housing are mutually by connecting, in the annular groove of its a part of spheroid of steel ball on lateral surface that annular groove on the lateral surface of rotating disk connects, tangent the leaning on of annular medial surface of the steel ball that the annular groove on the lateral surface of rotating disk connects and the step of case lid, case lid is fixedly connected with housing, be fastenedly connected case lid and housing with bolt by the connecting through hole of case lid and the connection blind hole of housing, make rotating disk and housing location, be that the center line of rotating disk and the center line of housing are on same straight line, the center line of the side through hole of housing is in the plane at the place of the center line of six side through hole of rotating disk, pincers tooth assembly and piston rod contraposition, be the slide block of each pincers tooth assembly box hole center line at grade, the center line in box hole and the vertical and intersectant centerline of housing of the slide block of its pincers tooth assembly, the center line of piston rod is in the plane at the place of the center line in the box hole of the slide block of each pincers tooth assembly, the fixing center line of slide block and the center line of piston rod are on same straight line, piston rod also comprises with pincers tooth assembly location, when in the locating hole of the pin jacking rotating disk of the spring catch on housing, behind its rotating disk location, there is a pair of pincers tooth assembly to be positioned at two piston rod middles, a pair of pincers tooth assembly in place when this becomes rotating disk location to pincers tooth assembly, the center line in the box hole of the slide block of its a pair of pincers tooth assembly in place and the center line of two piston rods are on same straight line, the center line of two spring pin holes of its correspondence on the both sides rotating disk of the center line of two locating holes of slide block and pincers tooth assembly and the center line of rotating disk are at grade, in the plane at the center line place of each locating hole of the center line of the spring catch on housing on rotating disk perisporium.Transmission device comprises driving gear and driven gear; The tooth of driving gear put in the main through hole of housing and with mutual meshing connection of tooth of driven gear on rotating disk, the center line of driving gear is parallel with the center line of housing, the head of the axle of driving gear exposes housing, the head of its axle pierces in the side through hole of case lid.Positioner comprises spring catch on housing and corresponding locating hole on rotating disk perisporium, be installed and connected in the locating hole of spring catch in the spring catch through hole on rotating disk and corresponding slide block, be installed and connected in spring catch in the spring catch through hole on slide block and the groove of piston rod pin thread, the side through hole of the positioning sliding block on piston rod and the side through hole of housing and rotating disk, the specification of its pincers tooth assembly of same group is identical, the specification of pincers tooth assembly is on the same group not identical, its each group pincers tooth assembly arranges respectively corresponding and the oil pipe of the different size specification of mating that adapts, like this, each group pincers tooth assembly mates the oil pipe that it adapts to specification separately, on the shell of the spring catch on its housing, there is latch through hole, the center line of its latch through hole is vertical with the center line of shell, the pin of the spring catch on housing has latch connecting hole, the center line of its latch connecting hole is vertical with the center line of the pin of spring catch, be equipped with latch, when the pin of spring catch is by spring pressure stretch and while putting in the locating hole of rotating disk completely, latch is injected in the latch connecting hole of pin of latch through hole on the shell of spring catch and spring catch, make between the shell of its spring catch and the pin of spring catch fixing.The head of the axle of driving gear protrudes from outside case lid, in case lid, install and connect dial, it is placed on the head of the axle of driving gear, on dial, be carved with the numeral of three kinds of specifications of the pincers tooth assembly that swinging reducing oil pipe clamping device equips, the head of its axle is installed and is connected pointer (33), by pointer and dial, to show the specification of pincers tooth assembly one group of pincers tooth assembly whether in place and in place.The be tightly connected hydraulic oil pipeline of hydraulic system of port connection.In the whole course of work of swinging reducing oil pipe clamping device, swinging reducing oil pipe clamping device has four positioning states, it is the location of rotating disk, the slips assembly of the positioning sliding block of piston rod or pincers tooth assembly in working order under location for the second time, piston rod is located by connecting with pincers tooth assembly, rotating disk and the location of clamping tooth assembly, in the whole impulse stroke of piston, first move ahead in process at piston, piston rod head stretches out the side through hole of housing together with a part for positioning sliding block, positioning sliding block is connected in the side through hole of housing and the side through hole of rotating disk, thereby realize secondary location, piston rod head puts in the box hole of slide block of pincers tooth assembly simultaneously, the pin clinching of the spring catch of the slide block of pincers tooth assembly enters in the annular groove of piston rod head, realize piston rod and clamp being located by connecting of tooth assembly, in piston retraction process, the pin clinching of the spring catch of rotating disk enters to clamp in the locating hole of slide block of tooth assembly, realizes rotating disk and the location of clamping tooth assembly, and meanwhile, piston rod separates with pincers tooth assembly, and piston rod head is retracted in the side through hole of housing together with positioning sliding block.In the course of work of swinging reducing oil pipe clamping device, duty while comprising dial rotation, duty when swinging reducing oil pipe clamping device loosens, duty when swinging reducing oil pipe clamping device clamps, when duty in the time of dial rotation or in the time that swinging reducing oil pipe clamping device loosens, its piston rod head is retracted into together with positioning sliding block in the side through hole of housing, piston rod separates with rotating disk, the pin of each spring catch of rotating disk respectively clinching enters to clamp in the locating hole of slide block of tooth assembly, each pincers tooth assembly is positioned respectively in each corresponding side through hole of rotating disk, in the time of the duty of swinging reducing oil pipe clamping device clamping, the pin of the spring catch on its housing is also put in a locating hole of rotating disk completely by spring pressure stretch, piston rod head stretches out the side through hole of housing together with a part for positioning sliding block, it puts in the side through hole of rotating disk, positioning sliding block is connected in the side through hole of housing and the side through hole of rotating disk, piston rod head puts in the box hole of slide block of one group of pincers tooth assembly in place simultaneously, the pin clinching of the spring catch of the slide block of pincers tooth assembly enters in the annular groove of piston rod head, and other each pincers tooth assembly is positioned respectively in each corresponding side through hole of rotating disk.Swinging reducing oil pipe clamping device adopts hydraulic-driven, in the time that hydraulic control system hydraulic oil enters left and right cylinder barrel and closes chamber, promoting piston driving about one group pincers tooth assembly in place moves to well head center respectively along case side through hole, realize and clamp oil pipe (34), in the time that hydraulic oil enters cylinder barrel unlatching chamber, left and right, promote piston driving about one group pincers tooth assembly in place to leaving the motion of well head center position, unclamp oil pipe, the switch of pincers tooth assembly is by the reversal valve control of hydraulic system.Swinging reducing oil pipe clamping device is equipped with handgrip, there is outer-hexagonal structure one end of handgrip, the interior hexagonal structure of the specification of outer-hexagonal structure of its handgrip and the head of the axle of driving gear matches, thereby matches in the time that the outer-hexagonal structure of handgrip is inserted in the interior hexagonal structure of head of the axle of driving gear; Like this, swinging reducing oil pipe clamping device is installed in the apparatus for work of oil and gas wellhead lower oil tube, in the time that the external diameter of the oil pipe removing changes, use handle rotation driving gear, make dial rotation, change one group of pincers tooth assembly in place, adapt a group of mating of choice for use and the external diameter specification of the oil pipe of required clamping clamps tooth assembly, and make and the one group of pincers tooth assembly use in place of mating that adapts of the external diameter specification of the oil pipe of required clamping, make it adapt to external diameter the oil pipe changing has occurred.

Claims (2)

1. a swinging reducing oil pipe clamping device, swinging reducing oil pipe clamping device is the utensil of the clamping oil pipe that uses in oil gas field shaft mouth operation, and it adopts hydraulic-driven, swinging reducing oil pipe clamping device comprises shell, hydraulic cylinder, slips assembly or pincers tooth assembly, side door, side door bolt, rotating disk, transmission device, positioner and steel ball, port connection, spring catch, and it also comprises sealing mechanism, swinging reducing oil pipe clamping device is bilateral symmetry, and namely its left side structure is identical and symmetrical with the specification framework of right side structure, spring catch comprises shell, spring, pin, its shell comprises fastening structure, the Hermetical connecting structure of housing, case lid and case lid and housing, housing comprises body and flange arrangement, body is rectangular structure, the center of body is the main through hole of hollow circular configuration, the center line of main through hole and the center line of housing on the same line, its body have driving gear installing hole, driving gear is installed and connected on housing by the driving gear installing hole of housing, driving gear comprises toothed disc and axle, connection toothed disc is installed in side channel, and there is axle connecting through hole the centre of toothed disc, and axle connecting through hole is square hole, the axle of driving gear is made up of four parts, be columniform head, the top of its head has the afterbody of interior hexagonal structure, cylindrical structural, the middle part of cube structure, is connected in the cylindrical structural of the external diameter that its external diameter between head and middle part is greater than head, axle sleeve enters in the axle connecting through hole of toothed disc, the afterbody of axle puts in the axis hole being inserted on housing, the middle part of axle is enclosed within the axle connecting through hole of centre of toothed disc, cover connected set circle on axle, lasso is circular ring structure, the cylindrical structural being connected between head and middle part of the axle of driving gear overlaps connected set circle, lasso is inserted in the counterbore of driving gear installing hole of housing, lasso respectively and the counterbore of driving gear installing hole of housing and the cylindrical structural being connected between head and middle part of the axle of driving gear be tightly connected, body has two side through hole, and two side through hole communicate with main through hole respectively, and a side through hole is positioned at main through hole side, and another side through hole is positioned at main through hole opposite side, the center line of two side through hole on the same line and with the vertical and intersectant centerline of main through hole, outside at the bottom of the annular of body is flange arrangement, and on the same line, the middle circular hole at the bottom of the intermediate throughholes of flange arrangement and the annular of body interlinks for the center line of flange arrangement and the center line of main through hole, and the lateral surface of flange arrangement has the groove of annular, housing there is spring catch connecting through hole, spring catch connecting through hole is installed linking springs pin, the perisporium that spring catch connecting through hole is positioned at housing the perisporium that penetrates housing, the center line of spring catch connecting through hole and the vertical and intersectant centerline of housing, spring catch is fixedly connected on housing by the spring catch connecting through hole of housing, spring catch is connected with housing seal, comprise two parts, one is being tightly connected of the shell of spring catch and the spring catch connecting through hole of housing, one is being tightly connected of the pin of spring catch and the spring catch connecting through hole of housing, the pin of spring catch stretches to the main through hole of housing, hydraulic cylinder comprises cylinder barrel and cylinder cap, piston and piston rod, screw mandrel, cylinder barrel bolt and sealing device, and piston rod is fixedly connected on the side of piston, and piston rod has the blind hole of connection wire rod,The blind hole of connection wire rod and the central through hole of piston interlink, the blind hole of connection wire rod and the central through hole of piston and piston rod, the center line of piston on the same line, internal thread is had in the blind hole of the central through hole of piston and the connection wire rod linking together, screw mandrel comprises body and step, body is circular pin, the step of the outwardly annular of intermediate peripheral wall of body, its step separates leading portion and back segment the body of screw mandrel, the external diameter of leading portion is less than the external diameter of back segment, the leading portion of body there is male thread, the top of the outer end of the side through hole that puts in housing of piston rod comprises pin thread and the pin connecting hole of head, pin thread comprises pin thread head and pin thread groove, pin thread groove is by the annular groove of the center line around piston that the head perisporium of piston rod concaves out, the center line of pin thread head and pin thread groove and piston rod on the same line, the center line of its center line and piston on the same line, pin connecting hole is arranged at the top of the outer end of the side through hole that puts in housing of piston rod, the pin center line of connecting hole and the vertical and intersectant centerline of piston rod, and pin connecting hole is between pin thread and piston, and pin thread groove is between pin thread head and pin connecting hole, the many group pincers of swinging reducing oil pipe clamping device equipment many groups slips assembly or equipment tooth assembly, when the many groups of swinging reducing oil pipe clamping device equipment slips assembly, the slips assembly of its equipment comprises slip spider, slip insert, slip spider there is the box hole of the pin thread of connection piston rod, box hole is the connecting hole of pin thread, it is circular hole, the center line in box hole of its slip spider and the center line of slip spider are on the same line, slip spider there are two spring pin holes, two spring pin holes lay respectively at the both sides in box hole and communicate with box hole respectively, the center line of two spring pin holes point-blank, the vertical and intersectant centerline in its center line and box hole, slip spider there are two locating holes, two locating holes lay respectively at the both sides of the plane at the center line of slip spider and the center line place of two spring pin holes, the center line of two locating holes on the same line, its center line is perpendicular to the plane at the center line of slip spider and the center line place of two spring pin holes, linking springs pin is installed respectively in two spring pin holes of slip spider, slip spider and slip insert are interconnected, between slip spider and slip insert, adopt direct fixed connection structure or adopt by the dog screw fixed connection structure of socket cap, when adopting direct fixed connection structure between slip spider and slip insert, other member is not passed through between slip spider and slip insert, slip spider is directly fixedly connected with mutually with slip insert, and slips assembly is as a whole, when adopting the dog screw fixed connection structure by socket cap between slip spider and slip insert, slips assembly comprises the dog screw that also comprises socket cap, and there is external screw thread the rear end of the dog screw of socket cap, slip spider has inner circle arcuate structure, inner circle arcuate structure and box hole lay respectively at the medial and lateral of the pedestal of slip spider, inner circle arcuate structure there is circular connecting hole, the center line of the circular connecting hole of its slip spider and the center line of slip spider are on the same line, slip spider there is the positioning screw hole of two socket caps, the positioning screw hole of two socket caps lays respectively at the both sides of circular connecting hole and communicates with circular connecting hole respectivelyPoint-blank, the vertical and intersectant centerline of its center line and circular connecting hole, has internal thread in the positioning screw hole of socket cap to the center line of the positioning screw hole of two socket caps, the center line of the positioning screw hole of two socket caps and the center line of slip spider and two spring pin holes is in same plane, slip insert is circular arc sheet, in its slip insert has, outer two wall side faces, a wall is inner circle arc side face, be referred to as inwall side face, another wall side face is cylindrical arc side face, be referred to as outer wall side face, its inwall side face there is locking teeth structure, outwardly circular coupling bar on outer wall side face, locking teeth structure and circular coupling bar lay respectively in the body of slip insert, outside, the circular center line of coupling bar and the center line of slip insert are point-blank, there is annular anchoring groove the outer end of circular coupling bar, external diameter and the length of circular coupling bar are corresponding identical with internal diameter and the degree of depth of circular connecting hole, the circular coupling bar of its slip insert injects in the circular connecting hole of its slip spider and matches like this, the inwall side face of the outer wall side face of slip insert and the inner circle arcuate structure of slip spider is mutually by connecting, the dog screw of socket cap is injected respectively in the positioning screw hole of two socket caps on slip spider, make to screw and be connected between the external screw thread of rear end of the dog screw of socket cap and the internal thread of the positioning screw hole of socket cap, the front end of the dog screw of socket cap puts in the annular anchoring groove of circular coupling bar and is connected with the annular anchoring groove of circular coupling bar, the dog screw of two socket caps is made to clamp and block circular coupling bar, thus realize the circular coupling bar that is locked, the specification of slips assembly refers to the internal diameter specification of slips assembly, the i.e. internal diameter specification of the inwall side face of the slip insert of slips assembly, when the many group pincers of swinging reducing oil pipe clamping device equipment tooth assembly, the pincers tooth assembly of its equipment comprises the dog screw of slide block and pincers tooth and socket cap, pincers tooth is by clamping tooth body, tooth body and circular coupling bar form, pincers tooth body is rectangular block, tooth body is by the wall body that clamps the thread form that inwall that tooth body extends is inner circle arc, the inwall of tooth body there is locking teeth structure, the outwardly rectangular block structured fixed block in middle part of one side of pincers tooth body, fixed block runs through the side being connected with fixed block of pincers tooth body, the fixed block of pincers tooth body connects circular coupling bar, tooth body and circular coupling bar lay respectively in pincers tooth body, outer both sides, the center line of circular coupling bar and the center line of pincers tooth are on the same line, there is annular anchoring groove the outer end of circular coupling bar, slide block is rectangular block structure, one side of slide block middle part have recessed rising as high as the banks, the side at the recessed recessed place of rising as high as the banks of running through slide block of rising as high as the banks, slide block there is the circular connecting hole that is connected and fixed pincers tooth, the aperture of circular connecting hole is in recessed groove bottom of rising as high as the banks, the circular center line of connecting hole and the center line of slide block are on the same line, distance between recessed two groove sides of rising as high as the banks is corresponding identical with the width of the fixed block of pincers tooth body, the recessed degree of depth of rising as high as the banks is corresponding identical with the thickness of the fixed block of pincers tooth body, slide block there is the dog screw through hole of two socket caps, the dog screw through hole of two socket caps lays respectively at the both sides of circular connecting hole and communicates with circular connecting hole respectively, the center line of the positioning screw hole of two socket caps point-blank,The vertical and intersectant centerline of its center line and circular connecting hole, has internal thread in the positioning screw hole of socket cap, slide block there is the box hole of the pin thread of connection piston rod, box hole is the connecting hole of pin thread, it is circular hole, the center line in box hole of its slide block and the center line of slide block are on the same line, slide block there are two spring pin holes, two spring pin holes lay respectively at the both sides in box hole and communicate with box hole respectively, the center line of two spring pin holes point-blank, the vertical and intersectant centerline in its center line and box hole, slide block there are two locating holes, two locating holes lay respectively at the both sides of the plane at the center line of the center line of circular connecting hole and the positioning screw hole of two socket caps and the center line place of two spring pin holes, the center line of two locating holes on the same line, its center line is perpendicular to the plane at the center line of the center line of circular connecting hole and the positioning screw hole of two socket caps and the center line place of two spring pin holes, linking springs pin is installed respectively in two spring pin holes on slide block, external diameter and the length of circular coupling bar are corresponding identical with internal diameter and the degree of depth of circular connecting hole, circular coupling bar of its pincers tooth injects in the circular connecting hole of its slide block and matches like this, the fixed block of pincers tooth body sandwich slide block a side recessed the rising as high as the banks at middle part in match, the dog screw of socket cap is injected respectively in the positioning screw hole of two socket caps of slide block, make to screw and be connected between the external screw thread of rear end of the dog screw of socket cap and the internal thread of the positioning screw hole of socket cap, the front end of the dog screw of socket cap puts in the annular anchoring groove of circular coupling bar and is connected with the annular anchoring groove of circular coupling bar, the dog screw of socket cap is made to clamp and block circular coupling bar, thus realize be locked circular coupling bar and pincers tooth, the specification of pincers tooth assembly refers to the internal diameter specification of pincers tooth assembly, the internal diameter specification of the inwall of the inner circle arc of the wall body of the thread form that the pincers tooth body that namely clamps tooth assembly extends, like this, piston rod packs in the hole in the middle of side door, connection positioning sliding block on piston rod, positioning sliding block there is piston rod connecting through hole, its piston rod connecting through hole longitudinally penetrates positioning sliding block body, the center line of piston rod connecting through hole and the center line of positioning sliding block are on the same line, positioning sliding block there is the dog screw through hole of two socket caps, the dog screw through hole of two socket cap lays respectively at the both sides of piston rod connecting through hole and communicates with piston rod connecting through hole, in the dog screw through hole of socket cap, it is internal thread, the center line of the dog screw through hole of socket cap and the vertical and intersectant centerline of piston rod connecting through hole, connection dog screw is installed in the dog screw through hole of socket cap, the front end of dog screw puts in the pin connecting hole of piston rod, the external screw thread of dog screw rear end screws be connected with the dog screw through hole internal thread of socket cap, positioning sliding block is fixedly connected on piston rod, piston and piston rod are inserted in cylinder barrel, internal thread in the blind hole of the connection wire rod of the male thread on the leading portion of the body of screw mandrel and the central through hole of piston and the piston rod that links together screws and is connected, cylinder cap sealing shroud connects the back segment of the body of screw mandrel, the sealing device of hydraulic cylinder comprises the sealing between the back segment of body of cylinder cap and screw mandrel and the sealing between cylinder cap and cylinder barrel and the sealing between side door and cylinder barrel,Sealing between piston rod and side door, sealing between piston rod and side door is divided into two parts, a part is sealed well pressure, a part is the oil pressure that sealing hydraulic control produces, twice sealing mechanism is between Zhe Liang department, for making the sealing at this place very reliable, there is the sealing ring of multiplet, and the auxiliary seal of middle O-ring seals, side door itself is connected with housing by side door bolt, side door is positioned at the side through hole outside of housing, cylinder cap and cylinder barrel are fixed together by cylinder barrel bolt and side door, and piston rod and positioning sliding block put in the side through hole of housing, and the sealing between side door and cylinder barrel adopts y-shaped ring to realize two way seal, the sealing mechanism of swinging reducing oil pipe clamping device comprises sealing and the sealing of oil circuit and the sealing of housing and case lid between sealing device and side door and the housing of hydraulic cylinder, two oil circuit holes are had in the body of housing, one oil circuit hole collar extension is positioned at outside, housing front, internal orifice is two, it lays respectively at the outside of housing two side through hole, oil circuit hole two internal orifice respectively identical with the specification in the oil circuit aperture of its corresponding connected side door, link position is corresponding, the oil circuit hole collar extension of its housing is fixedly connected with port connection, its another oil circuit hole collar extension is also positioned at outside, housing front, internal orifice is two, it lays respectively at the outside of housing two side through hole, oil circuit hole two internal orifice respectively identical with the specification in the oil circuit aperture of its corresponding connected side door, link position is corresponding, the oil circuit hole collar extension of its housing is fixedly connected with port connection, in cylinder cap body, have an oil circuit hole, cylinder cap body is pierced into from all sides that are connected corresponding to cylinder barrel, cylinder cap inner side in its oil circuit hole, and passes in the middle of cylinder cap inner side, cylinder barrel has an oil circuit hole, the one oil circuit orifice sealing in the oil circuit aperture, all sides in cylinder cap oil circuit hole and the oil circuit hole of cylinder barrel joins, oil circuit aperture in the middle of the inner side in the interior oil circuit of cylinder cap hole is led in cylinder barrel, two oil circuit holes of crossing side door are had in its side door, the two oil circuit apertures in an oil circuit hole of side door are connected with another oil circuit aperture in the oil circuit hole of cylinder barrel and the oil circuit orifice sealing of housing respectively, and another oil circuit hole of side door and another oil circuit hole sealing of housing interlink and lead in cylinder barrel, its each parts are successively installed connection according to program respectively and are completed, and between each interface in oil circuit hole, all have rubber seal connection, it forms the oil circuit of independent completion sealing, sealing and the oil circuit hole external tapping of port connection and housing and the sealing of housing between the each interface in hole, sealed packet oil scraper road of oil circuit, the left and right symmetry of structure of swinging reducing oil pipe clamping device, connects respectively piston rod and positioning sliding block in the left and right side through hole of housing, rotating disk is cirque structure, the central through hole of rotating disk is vertical circular hole, the center line of the central through hole of rotating disk and the center line of rotating disk are on the same line, the body of the rotating disk in the outside of the central through hole of rotating disk there are multiple side through hole, the wall body of the body i.e. rotating disk of rotating disk, its side through hole is cross through hole, side through hole communicates with central through hole, side through hole is on the outer wall of rotating disk, the i.e. wall body of side through hole lateral penetration rotating disk, the center line of side through hole and the vertical and intersectant centerline of rotating disk, multiple side through hole are uniformly distributed on the wall body of rotating disk, namely the crossing angle of the center line of each two adjacent side through hole is identical, multiple side through hole on rotating disk arrange in pairs, namely two relative side through hole form a pair of side through hole,The center line of its same two side through hole to side through hole on the same line, form the structure of multipair side through hole, the center line of multiple side through hole at grade, its side through hole connects respectively two relative spring pin holes, be connected in the center line of two the relative spring pin holes on the through hole of the same side on the same line, the center line of two spring pin hole and the centerline parallel of rotating disk, and with the side through hole vertical and intersectant centerline that is connected two spring pin hole, two spring pin holes communicate with side through hole respectively, and the aperture of an one spring pin hole is positioned on a side of rotating disk, and the aperture of another spring pin hole is positioned on the another side of rotating disk, and linking springs pin is installed respectively in two spring pin holes, the wall body of rotating disk there are multiple locating holes, the aperture of locating hole be positioned at rotating disk the perisporium of wall body on, the center line of locating hole and the vertical and intersectant centerline of rotating disk, the center line of each locating hole on the wall body of rotating disk at grade, locating hole on rotating disk is corresponding with the side through hole on rotating disk, quantity is identical, multiple locating holes be uniformly distributed in rotating disk wall body on, namely the crossing angle of the center line of each two adjacent locating holes is identical, the crossing angle of its crossing angle and the center line of two adjacent side through hole is identical, multiple locating holes on rotating disk arrange in pairs, namely two relative locating holes form a pair of locating hole, its center line with two locating holes of a pair of locating hole on the same line, form the structure of multipair locating hole, the perisporium of the wall body of the side of the side through hole of rotating disk is machined into driven gear, this side is referred to as the outside of rotating disk, one side of the adjacent driven gear of rotating disk is referred to as the lateral surface of rotating disk, the another side of rotating disk is referred to as medial surface, the center line of driven gear and the center line of rotating disk are on the same line, inside and outside two sides of rotating disk there is respectively the annular groove around central through hole, two annular groove specification is identical, on the same line, the center line of its center line and rotating disk on the same line for the center line of two annular grooves, the perisporium of the wall body of the opposite side of the side through hole of rotating disk there is the side ring connected in star around central through hole, its center line of side ring connected in star and the center line of rotating disk are on the same line, connection slips assembly or pincers tooth assembly are installed respectively in each side through hole of rotating disk, namely slips assembly or pincers tooth assembly are installed and connected in the side through hole of rotating disk, slips assembly or pincers tooth assembly in the side through hole of rotating disk arrange in pairs, namely two relative slips assemblies or two relative pincers tooth assemblies form a pair of slips assembly or a pair of pincers tooth assembly, it is one group of slips assembly or one group of pincers tooth assembly with a pair of slips assembly or with a pair of pincers tooth assembly, slips assembly or pincers tooth assembly are put in the side through hole of rotating disk, the outer wall of the outer wall of the slip spider of its slips assembly or the pincers tooth slide block of pincers tooth assembly coordinates the inwall of side through hole, the box hole of the box hole of the slip spider of slips assembly or the slide block of pincers tooth assembly is towards rotating disk outside, rotating disk is installed and connected in the main through hole of housing, side ring connected in star on annular groove on inside and outside two sides of rotating disk and the perisporium of rotating disk is installed respectively some steel balls, the steel ball of the annular groove connection on face and tangent the leaning on of the inner bottom surface at the bottom of annular of housingIn the annular groove of the steel ball one part sphere of the side ring connected in star connection of the perisporium of rotating disk on medial surface, the main through hole internal perisporium of the steel ball that the side ring connected in star of the perisporium of rotating disk connects and housing is mutually by connecting, in the annular groove of the steel ball one part sphere of the annular groove connection on the lateral surface of rotating disk on lateral surface, the steel ball of annular groove connection on the lateral surface of rotating disk and tangent the leaning on of annular medial surface of the step of case lid, case lid is fixedly connected with housing, i.e. the connecting blind hole and be fastenedly connected case lid and housing of the connecting through hole by case lid and housing with bolt, make rotating disk and housing location, namely the center line of rotating disk and the center line of housing are on the same line, in the center line of the side through hole of the housing plane at the place of the center line of multiple side through hole of rotating disk, slips assembly or pincers tooth assembly and piston rod location, namely the box hole of the slide block of the center line in the box hole of the slip spider of each slips assembly or each pincers tooth assembly center line at grade, the center line in box hole and the vertical and intersectant centerline of housing of the center line in the box hole of the slip spider of its slips assembly or the slide block of pincers tooth assembly, in the plane of the center line of piston rod at the place of the center line in box hole of slip spider of each slips assembly or the center line in the box hole of the slide block of each pincers tooth assembly, the fixing center line of slide block and the center line of piston rod are on the same line, piston rod and slips assembly or pincers tooth assembly location also comprise, when in the locating hole of the pin jacking rotating disk of the spring catch on housing, behind its rotating disk location, a pair of slips assembly or pincers tooth assembly is had to be positioned at two piston rod middles, a pair of slips assembly or pincers tooth assembly in place when this becomes rotating disk location to slips assembly or pincers tooth assembly, the center line in box hole of the box hole of the slip spider of its a pair of slips assembly in place or the slide block of a pair of pincers tooth assembly and the center line of two piston rods are on the same line, the center line of two spring pin holes of its correspondence on the both sides rotating disk of the center line of two locating holes of slip spider or two locating holes of slide block and slips assembly or pincers tooth assembly and the center line of rotating disk are at grade, in the plane at the center line place of the center line of the spring catch on housing each locating hole on rotating disk perisporium, transmission device comprises driving gear and driven gear, the tooth of driving gear put in the main through hole of housing and with mutual meshing connection of the tooth of driven gear on rotating disk, the center line of driving gear and the centerline parallel of housing, the head of the axle of driving gear exposes housing, and the head of its axle pierces in the side through hole of case lid, positioner comprises spring catch on housing and the locating hole on corresponding rotating disk perisporium, be installed and connected in spring catch in spring catch through hole on rotating disk and the corresponding locating hole of slip spider or the locating hole of slide block, be installed and connected in positioning sliding block on groove, the piston rod of spring catch in the spring catch in spring catch through hole on slip spider or the spring catch through hole on slide block and piston rod pin thread and the side through hole of rotating disk, the specification of the pincers tooth assembly that its slips assembly specification of same group is identical or same group is identical, the specification of the pincers tooth assembly of not identical or different group of slips assembly specification is on the same group not identical, its each group slips assembly or pincers tooth assembly arrange respectively the corresponding specification of mating that adapts with the oil pipe of different size, like thisIt adapts to the oil pipe of specification each group slips assembly or the each Self Matching of each group pincers tooth assembly, the shell of the spring catch on its housing there is latch through hole, its center line of latch through hole and the central axis of shell, the pin of the spring catch on housing has latch connecting hole, the central axis of its center line of latch connecting hole and the pin of spring catch, be equipped with latch, when the pin of spring catch is by spring pressure stretch and when putting in the locating hole of rotating disk completely, latch is injected in the latch connecting hole of pin of latch through hole on the shell of spring catch and spring catch, make between the shell of its spring catch and the pin of spring catch fixing, the head of the axle of driving gear protrudes from outside case lid, case lid is installed connection dial, it is placed on the head of the axle of driving gear, dial is carved with the numeral of the swinging reducing oil pipe clamping device slips assembly of equipping or the plurality of specifications that clamps tooth assembly, the head of its axle is installed connection pointer, by pointer and dial, to show the specification of slips assembly or pincers tooth assembly one group of slips assembly whether in place and in place or pincers tooth assembly, the be tightly connected hydraulic oil pipeline of hydraulic system of port connection, in the whole course of work of swinging reducing oil pipe clamping device, swinging reducing oil pipe clamping device has four positioning states, the i.e. location of rotating disk, the secondary location of the positioning sliding block of piston rod, being located by connecting of piston rod and slips assembly or pincers tooth assembly, the location of rotating disk and slips assembly or pincers tooth assembly, in the whole impulse stroke of piston, first move ahead in process at piston, piston rod head stretches out the side through hole of housing together with a part for positioning sliding block, positioning sliding block is connected in the side through hole of housing and the side through hole of rotating disk, thus realize slips assembly or pincers tooth assembly in working order under location for the second time, simultaneously piston rod head puts in the box hole of slip spider of slips assembly or clamps in the box hole of slide block of tooth assembly, the pin clinching of the spring catch on the slip spider of slips assembly enter in the annular groove of piston rod head or the slide block of pincers tooth assembly the pin clinching of spring catch enter in the annular groove of piston rod head, realize being located by connecting of piston rod and slips assembly or pincers tooth assembly, in piston retracts process, the pin clinching of the spring catch of rotating disk enters in the locating hole on the slip spider of slips assembly or the pin clinching of the spring catch of rotating disk enters to clamp in the locating hole of slide block of tooth assembly, realize the location of rotating disk and slips assembly or pincers tooth assembly, simultaneously, piston rod is separated with slips assembly or pincers tooth assembly, and piston rod head is retracted into together with positioning sliding block in the side through hole of housing, duty when the course of work of swinging reducing oil pipe clamping device comprises dial rotation, duty when swinging reducing oil pipe clamping device loosens, duty during swinging reducing oil pipe gripping means grips, during duty when dial rotation or when swinging reducing oil pipe clamping device loosens, its piston rod head is retracted into together with positioning sliding block in the side through hole of housing, piston rod is separated with rotating disk, the clinching that the pin of each spring catch on rotating disk is corresponding respectively enters the clinching that the pin of each spring catch pressure in the locating hole on the slip spider of slips assembly or on rotating disk is corresponding respectively and enters to clamp in the locating hole of slide block of tooth assembly, each slips assembly or each pincers tooth assembly are positioned respectively in the side through hole of each correspondence of rotating disk,During duty when swinging reducing oil pipe gripping means grips, the pin of the spring catch on its housing is by spring pressure stretch and put in completely in a locating hole of rotating disk, piston rod head stretches out the side through hole of housing together with a part for positioning sliding block, it puts in the side through hole of rotating disk, positioning sliding block is connected in the side through hole of housing and the side through hole of rotating disk, simultaneously piston rod head puts in the box hole of slip spider of one group of slips assembly in place or in the box hole of one group of slide block that clamps tooth assembly in place, the pin clinching of the spring catch on the slip spider of its slips assembly enter in the annular groove of piston rod head or the slide block of pincers tooth assembly the pin clinching of spring catch enter in the annular groove of piston rod head, and other slips assembly or pincers tooth assembly are positioned respectively in the side through hole of each correspondence of rotating disk, the switch of slips assembly or pincers tooth assembly is by the reversal valve control of hydraulic system, be equipped with hand handle, there is outer-hexagonal structure one end of hand handle, the interior hexagonal structure of the specification of outer-hexagonal structure of its hand handle and the head of the axle of driving gear matches, thus matches when the outer-hexagonal structure of hand handle is inserted in the interior hexagonal structure of head of axle of driving gear, it is characterized in that: the shell of swinging reducing oil pipe clamping device comprises housing, case lid, inside chime rings shape structure on the internal perisporium of one end of the main through hole of housing, at the bottom of it is the annular of body, the plane that inner face at the bottom of the annular of body is cirque structure, the other end of main through hole is referred to as outer end, its body of all sides, outer end there is driving gear installing hole, driving gear installing hole on housing comprises counterbore and axis hole, side channel, counterbore is circular hole, the perisporium of axis hole there are the main through hole of body of connection and the side channel of axis hole, housing has spring catch connecting through hole, case lid comprises covers body, step, flange arrangement, side through hole, lid body is cirque structure, in the middle of lid body, it is round tube hole, the step that the side of lid body is outwardly cirque structure, round tube hole in the middle of step interlinks with the round tube hole in the middle of lid body, the opposite side of lid body is flange arrangement, and the through hole of the centre of flange arrangement interlinks with the round tube hole of the centre of lid body, and there is a side through hole all sides of the round tube hole of the centre of lid body.

2. swinging reducing oil pipe clamping device according to claim 1, it is characterized in that: the center hole at the bottom of the annular of the body of shell and the center line of housing are on same straight line, the internal diameter of counterbore is greater than the internal diameter of axis hole, between counterbore internal perisporium and the internal perisporium of axis hole, form a ledge structure, the center line of counterbore and axis hole is on same straight line, the center line of body is respectively perpendicular to two relative groove sides of side channel, uniform multiple connection blind holes on its body of the outer circumferential side of the outer end of main through hole, in its blind hole, it is internal thread, the center line of blind hole is parallel with the center line of housing, the center line of the step of case lid and lid body, flange arrangement is on same straight line, the internal diameter of the side through hole of all sides of the round tube hole of the centre of lid body equals the external diameter of the head of the axle of driving gear, all sides of the round tube hole of the centre of lid body are uniformly distributed multiple connecting through holes, have annular groove on the lateral surface of flange arrangement.