CN203626699U - Hydraulic ram preventer adopting variable-diameter sealing - Google Patents

Abstract

A hydraulic ram preventer adopting variable-diameter sealing comprises a casing, a hydraulic cylinder, variable-diameter ram assemblies, a side door, side door bolts, oil port joints and a sealing mechanism, wherein each variable-diameter ram assembly comprises a variable-diameter ram body and a sealing assembly, the sealing assembly comprises a top rubber core and a front variable-diameter rubber core which comprises variable-diameter colloids, iron pieces adopting special-shaped cam structures, iron gaskets, movable rods and connecting rods, and the variable-diameter rubber core is formed into a whole by a plurality of iron pieces adopting the special-shaped cam structures, the four iron gaskets, the two movable rods, the two connecting rods and rubber in a mold through one-time sulfuration. One group of variable-diameter ram assemblies can seal pipe columns with different specification sizes, so that the variable-diameter sealing is realized; and further, the hydraulic ram preventer adopting variable-diameter sealing is simple in structure and convenient to mount, so that the work production efficiency of a worker is greatly improved, and new potential safety hazards are completely eradicated.

Description

The hydraulic flashboard blowout preventer of reducing sealing

Technical field

The utility model relates to a kind of well controlled blowout-proof device---hydraulic flashboard blowout preventer, especially the hydraulic flashboard blowout preventer of reducing sealing.

Background technology

Hydraulic flashboard blowout preventer is the well controlled blowout-proof device that oilfield downhole operation uses, and a kind ofly designs device that can timely safe closing well after well kick occurs because taking precautions against gas blowout accident; At present, hydraulic flashboard blowout preventer adopts hydraulic-driven, and in the time of lower oil tube, when Oil/gas Well generation overflow or blowout or other spy oestrus condition, hydraulic flashboard blowout preventer can be realized sealing Oil/gas Well well.Hydraulic flashboard blowout preventer comprises housing, hydraulic cylinder, flashboard assembly, side door, side door bolt, port connection, and hydraulic flashboard blowout preventer also comprises sealing mechanism, hydraulic flashboard blowout preventer is symmetrical structure, and its left side structure is identical and symmetrical with the specification framework of right side structure, housing comprises body and flange arrangement, body is rectangular structure, the center of body is the main through hole of hollow circular configuration, flange arrangement comprises neck flange and flange, on housing, there are two flange arrangements, two flange arrangements lay respectively at the both sides of body, the intermediate throughholes of two flange arrangement interlinks with main through hole respectively, the center line of flange arrangement and the center line of main through hole are on same straight line, housing has two or more side through hole, side through hole communicates with main through hole respectively, its side through hole constitutes the structure of one or more pairs of side through hole in pairs, same side through hole side through hole is positioned to 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 two side plane arrives respectively 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 structure comprises groove bottom and groove side, 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.Between the side through hole of hydraulic cylinder, side door and housing, complement one another, the quantity correspondence of the side through hole of hydraulic cylinder, side door and housing is identical, between hydraulic cylinder and side door and housing, is connected.Syndeton between hydraulic cylinder and side door and housing, be that piston rod packs in the middle hole of side door, piston is 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, side door is covered on side through hole, and cylinder cap and cylinder barrel are fixed together by cylinder barrel bolt and side door, and the sealing between side door and cylinder barrel adopts y-shaped ring to realize two way seal.The sealing mechanism of hydraulic flashboard blowout preventer comprises sealing between side door and housing and the sealing of oil circuit.Many oil circuit holes independently separately distribute in the body of housing, independently oil circuit hole is corresponding with side through hole for it, one is to corresponding two the oil circuit holes of side through hole, it independently has a collar extension and two oil circuit apertures in oil circuit hole, collar extension is positioned on body lateral surface, two oil circuit apertures lay respectively at the outside of same two side through hole to side through hole of housing, the oil circuit aperture in the oil circuit hole of the body of housing coordinates corresponding connection with the oil circuit aperture of side door, and the collar extension in the oil circuit hole of the body of its housing is fixedly connected with port connection; There are two oil circuit apertures in the outside of side through hole, and its two oil circuits aperture belongs to respectively two oil circuit holes, and its two oil circuit holes are respectively the oil circuit hole that oil circuit hole that control piston advances and control piston retreat; 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 from the centre 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, the oil circuit aperture of the centre of the inner side in the oil circuit hole of cylinder cap is led in cylinder barrel, in its side door, there is the oil circuit hole of two break-through side doors, the two oil circuit apertures in an oil circuit hole of side door interlink with the oil circuit hole sealing that another oil circuit aperture in oil circuit hole and the control piston of housing of cylinder barrel advance respectively, and the oil circuit hole sealing that the control piston of another of side door oil circuit hole and housing retreats interlinks and leads in cylinder barrel; Each parts are successively installed and have been connected according to program respectively, have rubber seal rings for seal to connect between its mutual direct-connected oil circuit aperture, form the oil circuit of independent completion sealing.The sealing of oil circuit comprises the sealing of the oil circuit hole collar extension of sealing between mutual direct-connected oil circuit aperture and port connection and housing.Hydraulic flashboard blowout preventer equipment flashboard assembly.Flashboard assembly comprises flashboard body and seal, on flashboard body, there is box structure, box structure matches with the pin thread structure of the outer end of piston rod, it is protruding straight trough, it is made up of inside groove and water jacket, there is protruding straight trough in the outside that is flashboard body, laterally break-through pedestal, its groove bottom is plane, protruding straight trough 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 flashboard body, 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 flashboard body, vertical distance between two groove sides of the inside groove of the protruding straight trough 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 flashboard body equates, flashboard body complements one another with seal and is connected.Seal comprises top glue core, anterior glue core, and top glue core also claims top sealing, and anterior glue core also claims front sealing.Hydraulic flashboard blowout preventer is symmetrical structure, housing is one or more pairs of side through hole structures, flashboard assembly is installed in its side through hole, and the pin thread structure of its piston rod injects in the box structure on corresponding flashboard body and mutually coincide, flashboard assembly in the same a pair of left and right side through hole of housing complements one another, relative between two, the flashboard assembly that two complements one another forms one group of flashboard assembly; Side through hole is corresponding identical with the quantity of flashboard assembly.Flashboard assembly has two classes, and a class flashboard assembly is full seal structure, is referred to as blind rams assembly, another kind of flashboard assembly is half seal structure, be referred to as half envelope flashboard assembly, partly sealing flashboard assembly comprises the flashboard body of half envelope, partly seals anterior glue core and top glue core, partly seal anterior glue core and comprise agent structure and external ear, agent structure is the structure of semi-toroidal shape, the external ear that forms symmetrical bulk shape is protruded respectively at the left and right two ends of its agent structure laterally, thereby, the head of its agent structure and external ear are interconnected to form the head of the anterior glue core of half envelope, and partly sealing anterior glue core has two heads, on the flashboard body of half envelope, there is hatch frame, hatch frame is positioned at the front portion of the flashboard body of half envelope, hatch frame with partly seal anterior glue core and adapt to, match, hatch frame comprises two opening sheets, the anteriomedial of opening sheet has the opening of arc, its opening both sides are respectively front facial planes, before two facial planes respectively with the crossing connection of internal perisporium face of opening, two front facial planes at grade, the middle tangent plane of the flashboard body of the arc core line of the internal perisporium face of opening and half envelope at grade, front facial planes is mutually vertical with the middle tangent plane of flashboard body, opening sheet has inner face, the arc core line of the internal perisporium face of opening is vertical with inner face, its inner face is vertical with front facial planes, the inner face of two opening sheets is parallel to each other relatively, two opening sheets are respectively top opening sheet and bottom opening sheet, and the arc core line of the internal perisporium face of two openings is on same straight line, between the inner face of two opening sheets, there is the internal perisporium face of arc to connect, the internal perisporium face of its arc is referred to as center peripheral wall surfaces, the arc core line of the arc core line of its center peripheral wall surfaces and the internal perisporium face of opening is on same straight line, the diameter of its center peripheral wall surfaces is greater than the diameter of the internal perisporium face of opening, center peripheral wall surfaces respectively with the crossing connection of inner face of two opening sheets, there is respectively inner plane the both sides of center peripheral wall surfaces, two inner planes at grade, inner plane and anterior plane parallel, inner plane connection crossing with center peripheral wall surfaces, inner plane intersects vertically and is connected with the inner face of opening sheet, arc seal groove is arranged at the top of the flashboard body of half envelope, arc seal groove comprises intermediate seal groove and side seal groove, two side seal grooves lay respectively at the both sides of intermediate seal groove, intermediate seal groove is connected with both sides sealing groove respectively, the degree of depth of intermediate seal groove is less than the degree of depth of side seal groove, the groove bottom of intermediate seal groove is parallel with the groove bottom of side seal groove, the groove bottom of intermediate seal groove is parallel with inner face, the groove bottom of side seal groove intersects vertically and is connected with inner plane, the groove bottom of the side seal groove on earth vertical distance of the inner face of opening sheet is less than the inner face vertical distance of the inner face of opening sheet on earth of top opening sheet, make the groove bottom of side seal groove, between the inner face of inner plane and top opening sheet, form a breach, on inner plane, have connection partly to seal the blind hole of anterior glue core, its blind hole center line is vertical with inner plane, the groove bottom of side seal groove has the blind hole that connects top glue core, and its blind hole center line is vertical with the groove bottom of side seal groove, and two blind holes intersections communicate, on the bottom opening sheet of the flashboard body of half envelope, there are centering guiding oblique angle and centering gathering sill, on bottom opening sheet, have the water jacket that connects centering guiding oblique angle, centering guiding oblique angle is fixedly connected on water jacket, and the fixed connection structure of centering guiding oblique angle and water jacket adopts welded construction or adopts headless screw syndeton, in the time adopting headless screw syndeton, on its bottom opening sheet, there are two through holes, the center line of its through hole is vertical with the inner face on bottom opening sheet, two through hole communicates with water jacket respectively, its through hole is female thread structure, on centering guiding oblique angle, have and two the corresponding internal thread holes that match of two through holes on bottom opening sheet, be fastenedly connected respectively bottom opening sheet and centering guiding oblique angle by headless screw, the centering oblique angle that leads is fixedly connected on water jacket.Like this, partly sealing anterior glue core cooperatively interacts and is connected with the flashboard body of half envelope, it partly seals anterior glue core and presses between the top opening sheet and bottom opening sheet of hatch frame of the flashboard body that is sandwiched in half envelope, and the connecting rod that the colloid of the anterior glue core of half envelope is stretched out in the outer end of partly sealing the connecting rod of anterior glue core injects the connection of the flashboard body of half envelope completely and partly seals in the blind hole of anterior glue core; Top glue core presses embedding to be sandwiched in the arc seal groove at top of the flashboard body of half envelope, and the connecting rod of the colloid that stretches out top glue core of its top glue core injects in the blind hole of connection top glue core of the flashboard body of half envelope completely; The connecting rod of its top glue core injects in the hole of outer end of the connecting rod of anterior reducing glue core.Like this, its top glue core and partly sealing on the flashboard body that anterior glue core is attached to respectively half envelope, Jiao Xin two, top cooperatively interacts and links together with two heads that partly seal anterior glue core respectively, and Jiao Xin two, top cooperatively interacts and links together and form confined space with the external ear that partly seals anterior glue core two ends respectively.Thereby, form the half flashboard assembly sealing.In the time of hydraulic flashboard blowout preventer equipment blind rams assembly, its hydraulic flashboard blowout preventer that is full seal structure; In the time that hydraulic flashboard blowout preventer equipment partly seals flashboard assembly, it is the hydraulic flashboard blowout preventer of half seal structure; In the time that hydraulic flashboard blowout preventer is not only equipped full envelope but also is equipped half envelope flashboard assembly, the hydraulic flashboard blowout preventer of its structure combining for full envelope and half envelope; Hydraulic flashboard blowout preventer is according to the hydraulic flashboard blowout preventer that is not all single disc of equipped flashboard assembly quantity or combination preventer, combination preventer comprises the hydraulic flashboard blowout preventer of double disc and the hydraulic flashboard blowout preventer of many flashboards, in the time that hydraulic flashboard blowout preventer is equipped one group of flashboard assembly, its hydraulic flashboard blowout preventer that is single disc; In the time that hydraulic flashboard blowout preventer is equipped two groups of flashboard assemblies, its hydraulic flashboard blowout preventer that is double disc; In the time that hydraulic flashboard blowout preventer is equipped more than three groups and three groups flashboard assemblies, its hydraulic flashboard blowout preventer that is many flashboards.The be tightly connected hydraulic oil pipeline of hydraulic system of port connection, in the time that hydraulic control system hydraulic oil enters the left and right cylinder barrel of controlling flashboard assembly and closes chamber, promote piston-advance and drive left and right flashboard assembly to move to well head center respectively along the side through hole of housing, realize sealing Oil/gas Well, in the time that hydraulic oil enters cylinder barrel unlatching chamber, left and right, promoting piston retreats and drives left and right flashboard assembly to leaving the motion of well head center position, open Oil/gas Well, flashboard assembly switch is by the reversal valve control of the hydraulic control unit of hydraulic system.The hydraulic flashboard blowout preventer of full seal structure, by closing or open blind rams assembly, thereby realizes totally-enclosed well head or opens well head; The hydraulic flashboard blowout preventer of half seal structure, by closing or open half envelope flashboard assembly, thereby realize the annular space between sealing tubing string and sleeve pipe or open tubing string and sleeve pipe between annular space; The hydraulic flashboard blowout preventer of the structure that full envelope and half envelope combine, by closing or open blind rams assembly, thereby realize totally-enclosed well head or open well head, again by closing or open half envelope flashboard assembly, thus realize the annular space between sealing tubing string and sleeve pipe or open tubing string and sleeve pipe between annular space.At present, the flashboard assembly that partly seals of the hydraulic flashboard blowout preventer that oil well is used is single size flashboard assembly, a kind of tubing string that partly seals flashboard assembly and can only seal corresponding size of size, and oil well tubing string used is all combined string mostly, therefore need to be equipped with the flashboard assembly of different size, thereby satisfy the demand by changing flashboard assembly, so not only in the time of operation, increase workload, and have potential safety hazard; Or, its hydraulic flashboard blowout preventer is equipped many groups and is partly sealed flashboard assembly, its each group is partly sealed flashboard assembly specification difference, thereby adapt to the variation of the external diameter specification of tubing string, and the hydraulic flashboard blowout preventer structure of this many flashboards repeats, volume greatly, high, the complicated operation of highly high, Heavy Weight, cost.So existing hydraulic flashboard blowout preventer can not meet the required requirement of well workover.

Utility model content

The purpose of this utility model is: the hydraulic flashboard blowout preventer that a kind of reducing sealing is provided, the flashboard assembly of its equipment reducing, the flashboard assembly that partly seals of equipping that the flashboard assembly of its reducing has overcome existing hydraulic flashboard blowout preventer is single size flashboard, the flashboard assembly of size can only seal a defect for the tubing string of corresponding size, and the flashboard assembly of its a set of reducing can seal the tubing string of different specification size; Thereby the hydraulic flashboard blowout preventer of its reducing sealing can seal the tubing string of different specification size by the flashboard total performance of one group reducing, realize reducing sealing, and simple in structure, easy for installation; Greatly improve workman's labor productivity, stopped to produce new potential safety hazard.

The purpose of this utility model is achieved in that the hydraulic flashboard blowout preventer of reducing sealing is the well controlled blowout-proof device that oilfield downhole operation uses, a kind of because of take precautions against gas blowout accident design, device that can timely safe closing well after well kick occurs, in the time of underground work, can realize well blowout prevention; It adopts hydraulic-driven, belongs to hydraulic flashboard blowout preventer.In the time of lower oil tube, when Oil/gas Well generation overflow or blowout or other spy oestrus condition, the hydraulic flashboard blowout preventer of reducing sealing can be realized sealing Oil/gas Well well.The hydraulic flashboard blowout preventer of reducing sealing comprises flashboard assembly, side door, side door bolt, the port connection of housing, hydraulic cylinder, reducing, and the hydraulic flashboard blowout preventer of reducing sealing also comprises sealing mechanism, the hydraulic flashboard blowout preventer of reducing sealing is symmetrical structure, and its left side structure is identical and symmetrical with the specification framework of right side structure, housing comprises body and flange arrangement, body is rectangular structure, the center of body is the main through hole of hollow circular configuration, flange arrangement comprises neck flange and flange, on housing, there are two flange arrangements, two flange arrangements lay respectively at the both sides of body, the intermediate throughholes of two flange arrangement interlinks with main through hole respectively, 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, side through hole communicates with main through hole respectively, its side through hole constitutes the structure of a pair of side through hole in pairs, same side through hole side through hole is positioned to 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 two side plane arrives respectively 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 structure comprises groove bottom and groove side, 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.Between the side through hole of hydraulic cylinder, side door and housing, complement one another, the quantity correspondence of the side through hole of hydraulic cylinder, side door and housing is identical, between hydraulic cylinder and side door and housing, is connected.Syndeton between hydraulic cylinder and side door and housing, be that piston rod packs in the middle hole of side door, piston is 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, side door is covered on side through hole, and cylinder cap and cylinder barrel are fixed together by cylinder barrel bolt and side door, and the sealing between side door and cylinder barrel adopts y-shaped ring to realize two way seal.The sealing mechanism of the hydraulic flashboard blowout preventer of reducing sealing comprises sealing between side door and housing and the sealing of oil circuit.Two oil circuit holes independently separately distribute in the body of housing, there are a collar extension and two oil circuit apertures in its oil circuit hole independently, collar extension is positioned on body lateral surface, two oil circuit apertures lay respectively at the outside of same two side through hole to side through hole of housing, the oil circuit aperture in the oil circuit hole of the body of housing coordinates corresponding connection with the oil circuit aperture of side door, and the collar extension in the oil circuit hole of the body of its housing is fixedly connected with port connection; There are two oil circuit apertures in the outside of side through hole, and its two oil circuits aperture belongs to respectively two oil circuit holes, and its two oil circuit holes are respectively the oil circuit hole that oil circuit hole that control piston advances and control piston retreat; 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 from the centre 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, the oil circuit aperture of the centre of the inner side in the oil circuit hole of cylinder cap is led in cylinder barrel, in its side door, there is the oil circuit hole of two break-through side doors, the two oil circuit apertures in an oil circuit hole of side door interlink with the oil circuit hole sealing that another oil circuit aperture in oil circuit hole and the control piston of housing of cylinder barrel advance respectively, and the oil circuit hole sealing that the control piston of another of side door oil circuit hole and housing retreats interlinks and leads in cylinder barrel; Each parts are successively installed and have been connected according to program respectively, have rubber seal rings for seal to connect between its mutual direct-connected oil circuit aperture, form the oil circuit of independent completion sealing.The sealing of oil circuit comprises the sealing of the oil circuit hole collar extension of sealing between mutual direct-connected oil circuit aperture and port connection and housing.The flashboard assembly of reducing belongs to the one of half envelope flashboard assembly, and the flashboard assembly of reducing comprises flashboard body and seal; Seal comprises top glue core, anterior reducing glue core, and top glue core also claims top sealing, and anterior reducing glue core also claims front reducing sealing; The flashboard body of the flashboard assembly of reducing matches with top glue core, anterior reducing glue core, and the flashboard body of the flashboard assembly of its reducing is referred to as variable bore ram body; Anterior reducing glue core is made up of agent structure and external ear, its agent structure is the structure of semi-toroidal shape, left and right two head part of its agent structure are protruded the external ear that forms symmetrical bulk shape not laterally, thereby, the head of its agent structure and external ear are interconnected to form the head of anterior reducing glue core, and anterior reducing glue core has two heads; Anterior reducing glue core comprises reducing colloid, ironware, parallels, motion bar, connecting rod; Reducing colloid is the carrier of ironware, parallels, motion bar, connecting rod, and ironware, parallels, motion bar, connecting rod are incorporated into respectively among reducing colloid.Anterior reducing glue core comprises multiple ironwares, four parallels, two motion bars and two connecting rods; Anterior reducing glue core is by the disposable sulfuration and become an entirety in mould of multiple ironwares, four parallels, two motion bars and two connecting rods and rubber.Ironware is the structure of special-shaped cam, ironware is made up of two special-shaped cams and connector, the end of ironware is special-shaped cam, special-shaped cam comprises head, middle part and afterbody, special-shaped cam is the structure of narrow " V " shape leaf lobe shape of head, special-shaped cam has lateral surface and medial surface, and lateral surface and the medial surface of special-shaped cam are parallel to each other, the outer wall of the head of special-shaped cam is arc-shaped surface, the outer wall of the head of its special-shaped cam respectively with lateral surface and the crossing connection of medial surface of special-shaped cam, the middle part of special-shaped cam have two respectively with lateral surface and the medial surface wall plane being connected that intersects vertically, two wall plane apportion both sides, two wall planes respectively with the crossing connection in two ends of the outer wall of head, in two wall planes, the short wall plane of its length is referred to as shortwall plane, the wall plane that its length is long is referred to as longwell plane, the afterbody of special-shaped cam is convex-concave curved configuration, the afterbody of special-shaped cam comprises the outside wall surface of " s " shape, the outside wall surface of arc curve and tail wall plane, the outside wall surface of " s " shape, the outside wall surface of arc curve and tail wall plane are respectively with the lateral surface of special-shaped cam with medial surface is crossing is connected, one end of the outside wall surface of " s " shape connects longwell plane, the other end of the outside wall surface of " s " shape connect tail wall flat and, one end of the outside wall surface of arc connects shortwall plane, the other end of the outside wall surface of arc connects tail wall plane, like this, tail wall interplanar is in the outside wall surface of " s " shape, between the outside wall surface of arc, and respectively with the outside wall surface of " s " shape, the outside wall surface of arc curve intersects and connects, the inner side of the affiliated plane that is positioned at longwell plane of the outside wall surface of " s " shape, the protrusion of the outside wall surface of arc curve and be positioned at the outside of the affiliated plane of shortwall plane, like this, the interior angle of the affiliated plane of tail wall plane and the affiliated Plane intersects of shortwall plane is obtuse angle, and the interior angle of the affiliated plane of tail wall plane and the affiliated Plane intersects of longwell plane is acute angle, connector is flat bar structure, and connector has two lateral surfaces and two arc surfaces, and two lateral surfaces of connector are parallel to each other, lateral surface between two arc surfaces, arc surface respectively with two crossing connections of lateral surface, connector two connects respectively special-shaped cam, the medial surface of special-shaped cam intersects vertically and is connected with connector, the center line of its connector is parallel and vertical with medial surface with the lateral surface of special-shaped cam with two lateral surfaces of connector respectively, and two special-shaped cams are positioned at respectively two outsides of connector symmetrically, an arc surface of connector and the head of special-shaped cam are in the same side, and another arc surface of connector and the afterbody of special-shaped cam are in the same side.Anterior reducing glue core has multiple ironwares, multiple ironwares are incorporated into respectively among reducing colloid, multiple ironwares space, evenly forward, ordered arrangement, the center line of the connector of its each ironware is parallel to each other and respectively on same circular arc, spacing distance between the center line of the connector of each ironware is identical, the lateral surface of the special-shaped cam that is positioned at the same side of its each ironware at grade, the medial surface of the special-shaped cam that is positioned at the same side of each ironware at grade, thereby multiple ironwares form the assembly of the frame construction of semi-ring form, assembly belongs to a part for anterior reducing glue core agent structure, two special-shaped cams of same ironware lay respectively at the skin of the both sides of anterior reducing glue core agent structure.Its ironware is longitudinally erected in reducing colloid inside, the head of the special-shaped cam of ironware is positioned at inner side, the afterbody of the special-shaped cam of ironware is positioned at outside, the head of ironware does not point to the arc core line of the circular arc at the center line place of the connector of each ironware, its arc core line refers to through the arc core of the circular arc at the center line place of the connector of its each ironware the center line parallel with the center line of the connector of each ironware respectively, ironware is tiltedly to its arc core line, and the head of the special-shaped cam of ironware refers to a side of arc core line partially; Interval between the head of the special-shaped cam of its multiple ironwares is identical, and same, the interval between the afterbody of the special-shaped cam of its multiple ironwares is identical.Parallels is rectangle structure, and there is through hole the centre of parallels, and its through hole has two relative inwall side planes that are parallel to each other and two relative arc inner wall faces, the inwall side plane that the be parallel to each other crossing connection relative with two respectively of arc inner wall face; Motion bar is columniform bar, and it comprises mobile jib and bar head, and bar head has two, mobile jib two ends are connecting-rod cap respectively, mobile jib and bar head are respectively cylindrical shape, and the diameter of mobile jib is greater than the diameter of bar head, and the center line of mobile jib and bar head and motion bar is on same straight line.Connecting rod is interconnected to constitute by main body bar and major part, main body bar is cylindrical shape, there is through hole the outer end of the main body bar of its connecting rod, its through hole has two relative inwall side planes that are parallel to each other and two relative arc inner wall faces, the inwall side plane that the be parallel to each other crossing connection relative with two respectively of arc inner wall face; On major part, there are an outer side plane and breach, its outer side plane is parallel with the inwall side plane of the through hole of main body bar, its breach is the opening of the shape of arc side face, and the arc core line of the arc side face of its breach is with outside plane parallel, and its arc core line is vertical with main body bar center line.The head of anterior reducing glue core has two glue planes that are parallel to each other, wherein, a glue plane is front glue plane before head, another glue plane back side after head is rear glue plane, the front glue plane of two heads of anterior reducing glue core at grade, its place plane is vertical with the longitudinal middle tangent plane of anterior reducing glue core, and the rear glue plane of two heads of anterior reducing glue core at grade.Its motion bar is longitudinally erected in the inside of the head of anterior reducing glue core, and be erected in the outside of assembly, the center line of the center line of motion bar and the connector of ironware is parallel to each other, the bar head of motion bar one end puts in the through hole of a parallels, the bar head of the motion bar other end puts in the through hole of another parallels, between its motion bar and parallels, be connected, the center line of motion bar is vertical with the lateral surface of two parallels respectively, motion bar and connecting rod interconnect, connecting rod links the mobile jib of motion bar by the breach on its major part, make the center line of main body bar and the center line of motion bar of connecting rod vertical, and the center line of the main body bar of connecting rod divides the vertical distance of the lateral surface that is clipped to two parallels to equate, the outer end of the main body bar of connecting rod is stretched out reducing colloid backward, stretch out the rear glue plane of the head of anterior reducing glue core, thereby, its motion bar and with direct-connected two parallels of its motion bar, connecting rod forms a grip assembly, one head of its anterior reducing glue core comprises a grip assembly, and another head of its anterior reducing glue core comprises another set of assembly, its be positioned at the same side of anterior reducing glue core two parallels lateral surface at grade, the center line of the main body bar of two connecting rod is parallel to each other, and the center line of the main body bar of two connecting rods divides the vertical distance of the longitudinal middle tangent plane that is clipped to anterior reducing glue core to equate.The agent structure of anterior reducing glue core comprises outer ring and the semicircular inner ring of arc, outer ring is intersected and is connected glue plane after two, inner ring intersects and connects two front glue planes, the arc core line of the arc core line of outer ring and the arc core line of inner ring and assembly is same straight line, and its arc core line is in the affiliated plane of longitudinal middle tangent plane of anterior reducing glue core; Its inner ring is sandwiched between the affiliated plane of medial surface of two special-shaped cams of same ironware, and the longitudinal middle tangent plane of the longitudinally middle tangent plane of inner ring and anterior reducing glue core is same plane.The inner ring of the agent structure of anterior reducing glue core adopts the structure of semicircular inwall side face or adopts the inwardly structure of the semi-ring body of each special-shaped cam of outstanding assembly of semicircular inwall side face.Two heads of anterior reducing glue core, one is the head that has two interfaces, one for there being the head of two guide grooves, at the head that has two interfaces of anterior reducing glue core, two special-shaped cams of the ironware of one end of its assembly stretch out respectively corresponding front glue plane, the part at the part for head that the part of stretching out front glue plane of its special-shaped cam is its special-shaped cam or the part at the head of special-shaped cam and middle part or the head of special-shaped cam whole and the middle part that is inconjunction with thereof, the part of stretching out front glue plane of its special-shaped cam is referred to as stretched head, stretched head is two, and the interface of the head of its anterior reducing glue core is in front glue plane, at the head that has two guide grooves of anterior reducing glue core, two special-shaped cams of the ironware of the other end of its assembly stretch out respectively corresponding its front glue plane, the part for afterbody that the part of stretching out front glue plane of its special-shaped cam is its special-shaped cam or the part at the afterbody of special-shaped cam and middle part, two special-shaped cams of the ironware of this end of its assembly respectively and between inner ring and front glue plane, produce the breach of two dihedrals, its breach is guide groove, the part of stretching out front glue plane of the special-shaped cam of this end of its assembly is referred to as to stretch out tail, and stretching out tail is two, in the time that the inner ring of the agent structure of anterior reducing glue core adopts the structure of semicircular inwall side face, its inner ring is the each special-shaped cam of outstanding assembly inwardly, when the inner ring of the agent structure of anterior reducing glue core adopts semicircular inwall side face inwardly when the structure of the semi-ring body of each special-shaped cam of outstanding assembly, its semi-ring body is the each special-shaped cam of outstanding assembly inwardly, its semi-ring body is sandwiched between the affiliated plane of medial surface of two special-shaped cams of same ironware, the longitudinal middle tangent plane of the longitudinally middle tangent plane of semi-ring body and anterior reducing glue core is same plane, the part at the head of a part for the head of two special-shaped cams of each ironware of assembly or the head of two special-shaped cams and the part at middle part or two special-shaped cams whole and the middle part that is inconjunction with thereof is inwardly tiltedly stretched out respectively the inwall side face of inner ring.Parallels protrudes the agent structure of anterior reducing glue core, be positioned at the outside of the affiliated plane of the lateral surface of special-shaped cam, interlaced between the special-shaped cam of parallels and the ironware in the head of anterior reducing glue core, partially overlap, its parallels is positioned at the skin of the head of anterior reducing glue core, and the head that connects the agent structure of anterior reducing glue core, parallels belongs to a part for external ear; Variable bore ram body complements one another with seal and is connected.On variable bore ram body, there is hatch frame, hatch frame is positioned at the front portion of variable bore ram body, hatch frame and anterior reducing glue core adapt to, match, hatch frame comprises two opening sheets, the anteriomedial of opening sheet has the opening of arc, its opening both sides are respectively front facial planes, before two facial planes respectively with the crossing connection of internal perisporium face of the opening of the arc of the anteriomedial of opening sheet, two front facial planes at grade, the arc core line of the internal perisporium face of opening and the middle tangent plane of variable bore ram body are at grade, front facial planes is mutually vertical with the middle tangent plane of variable bore ram body, opening sheet has middle inner face and two side inner faces, the both sides of inner face in the middle of two side inner faces lay respectively at, two side inner faces at grade, middle inner face is parallel with side inner face, middle inner face is mutually vertical with the arc core line of the internal perisporium face of opening, middle inner face protrudes from side inner face, thereby between inner face and side inner face, connect by side in the middle of it, its side is connected with middle inner face is vertical with side inner face respectively, two opening sheets are respectively top opening sheet and bottom opening sheet, the middle inner face of top opening sheet is relative with the middle inner face of bottom opening sheet and be parallel to each other, the side inner face of top opening sheet is relative with the side inner face of bottom opening sheet and be parallel to each other, and the arc core line of the internal perisporium face of the opening of two opening sheets is on same straight line, between the middle inner face of two opening sheets, there is the internal perisporium face of arc to connect, the internal perisporium face of its arc is referred to as center peripheral wall surfaces, the arc core line of the arc core line of its center peripheral wall surfaces and the internal perisporium face of opening is on same straight line, the diameter of its center peripheral wall surfaces is greater than the diameter of the internal perisporium face of opening, center peripheral wall surfaces respectively with the crossing connection of middle inner face of two opening sheets, there is respectively inner plane the both sides of center peripheral wall surfaces, two inner planes at grade, inner plane and anterior plane parallel, inner plane connection crossing with center peripheral wall surfaces, between inner plane and side inner face, be connected by interior lead angle, arc seal groove is arranged at the top of variable bore ram body, arc seal groove comprises intermediate seal groove and side seal groove, two side seal grooves lay respectively at the both sides of intermediate seal groove, intermediate seal groove is connected with both sides sealing groove respectively, the degree of depth of intermediate seal groove is less than the degree of depth of side seal groove, the groove bottom of intermediate seal groove is parallel with the groove bottom of side seal groove, the groove bottom of intermediate seal groove is parallel with middle inner face, the groove bottom of side seal groove intersects vertically and is connected with inner plane, the groove bottom of the side seal groove on earth vertical distance of the side inner face of opening sheet is less than the side inner face vertical distance of the side inner face of opening sheet on earth of top opening sheet, make the groove bottom of side seal groove, between the side inner face of inner plane and top opening sheet, form a breach, on inner plane, have the blind hole that connects anterior reducing glue core, its blind hole center line is vertical with inner plane, the groove bottom of side seal groove has the blind hole that connects top glue core, and its blind hole center line is vertical with the groove bottom of side seal groove, and two blind holes intersections communicate, on the bottom opening sheet of variable bore ram body, there are centering guiding oblique angle and centering gathering sill, on bottom opening sheet, have the water jacket that connects centering guiding oblique angle, centering guiding oblique angle is fixedly connected on water jacket, and the fixed connection structure of centering guiding oblique angle and water jacket adopts welded construction or adopts headless screw syndeton, in the time adopting headless screw syndeton, on its bottom opening sheet, there are two through holes, the center line of its through hole is vertical with the middle inner face on bottom opening sheet, two through hole communicates with water jacket respectively, its through hole is female thread structure, on centering guiding oblique angle, have and two the corresponding internal thread holes that match of two through holes on bottom opening sheet, be fastenedly connected respectively bottom opening sheet and centering guiding oblique angle by headless screw, the centering oblique angle that leads is fixedly connected on water jacket.Like this, anterior reducing glue core cooperatively interacts and is connected with variable bore ram body, its anterior reducing glue core is pressed and is sandwiched between the top opening sheet and bottom opening sheet of hatch frame of variable bore ram body, and the main body bar that the connecting rod of reducing colloid is stretched out in the outer end of the main body bar of the connecting rod of anterior reducing glue core injects in the blind hole of the anterior reducing glue of connection core of variable bore ram body completely; Top glue core presses embedding to be sandwiched in the arc seal groove at top of variable bore ram body, and the connecting rod that stretches out Jiao Xin top, top colloid of its top glue core injects in the blind hole of connection top glue core of variable bore ram body completely; Make the connecting rod of its top glue core cooperatively interact and be connected with the connecting rod of anterior reducing glue core, the connecting rod of its top glue core injects in the through hole of outer end of the main body bar of the connecting rod of anterior reducing glue core.Like this, its top glue core and anterior reducing glue core are attached to respectively on variable bore ram body, and Jiao Xin two, top cooperatively interacts and links together with two heads of anterior reducing glue core respectively, and forms confined space, thereby, the flashboard assembly of formation reducing.The diameter of the internal perisporium face of the arc of the opening sheet of variable bore ram body be greater than anterior reducing glue core inner ring semicircular inwall side face diameter or be greater than the diameter of the semi-ring body of anterior reducing glue core.On variable bore ram body, there is box structure, box structure is positioned at the back part of variable bore ram body, box structure matches with the pin thread structure of the outer end of piston rod, it is protruding straight trough, it is made up of inside groove and water jacket, there is protruding straight trough in the outside that is variable bore ram body, laterally break-through pedestal, its groove bottom is plane, protruding straight trough 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 variable bore ram body, 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 variable bore ram body, vertical distance between two groove sides of the inside groove of the protruding straight trough 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 variable bore ram body equates, the flashboard assembly of reducing has two, and the flashboard assembly of two reducings complements one another into the flashboard assembly of a set of reducing, and like this, its corresponding top glue core has two, and two top glue cores complement one another into a set of top glue core, its corresponding anterior reducing glue core also has two, and two anterior reducing glue cores complement one another into a set of anterior reducing glue core, and in its a set of anterior reducing glue core, two anterior reducing glue cored structures are identical, variable bore ram body also has two, two a set of variable bore ram bodies of the supporting one-tenth of variable bore ram body, in the time that the flashboard assembly of two reducings docks mutually, the flashboard assembly of two reducings of the flashboard assembly of a set of reducing complements each other to form a unified overall structure, in two variable bore ram bodies of a set of variable bore ram body, centering guiding oblique angle and centering gathering sill on two variable bore ram bodies cooperatively interact, make its centering guiding oblique angle inject mutually corresponding centering gathering sill, in two anterior reducing glue cores of a set of anterior reducing glue core, the head that has two interfaces on two anterior reducing glue cores cooperatively interacts and docks with the head that has two guide grooves respectively, it is stretched head and the guide groove on two anterior reducing glue cores respectively, stretch out tail and interface cooperatively interacts, make stretched head inject mutually corresponding guide groove, stretch out tail and inject mutually corresponding interface, and in its a set of anterior reducing glue core, the lateral surface of the special-shaped cam that is positioned at the same side of each ironware of two anterior reducing glue cores at grade.The hydraulic flashboard blowout preventer of reducing sealing is symmetrical structure, housing is a pair of side through hole structure, one is to installing respectively the flashboard assembly of reducing in two of side through hole side through hole, the flashboard assembly of the reducing in the same a pair of left and right side through hole of housing complements one another, relative between two, and in the through hole of the same side, box structure on the variable bore ram body of the flashboard assembly of the pin thread structure reeve reducing of its corresponding piston rod is interior and mutually identical, the flashboard assembly that the flashboard assembly of two reducing complementing one another is a set of reducing; The be tightly connected hydraulic oil pipeline of hydraulic system of port connection, in the time that hydraulic control system hydraulic oil enters the left and right cylinder barrel of flashboard assembly of controlling reducing and closes chamber, promote piston-advance and drive the flashboard assembly of left and right reducing to move to well head center respectively along the side through hole of housing, the flashboard assembly of two reducings docks mutually, in the time that tubing diameter is greater than the format diameter of the anterior reducing glue core under nature, its multiple ironwares end touches the surface of oil pipe, has produced mutual thrust (along oil pipe radial direction) simultaneously.The stressed extruding of ironware is outwards moved, simultaneously the connector of special-shaped cam structure produces and rotatablely moves, inner ring contacts and is extruded with the appearance of oil pipe, in the time that the active force (along oil pipe radial direction) of extruding increases to the specification form that can change anterior reducing glue core, make anterior reducing glue core produce distortion, realize anterior reducing glue core reducing, thereby the annular space between sealing oil pipe and sleeve pipe, realizes sealing Oil/gas Well; In the time that tubing diameter is less than the format diameter of anterior reducing glue core under nature, ironware and rubber are subject to the effect of variable bore ram body simultaneously, extruding is to internal motion, oil pipe surface is formed and surrounds extruding, in the time that the active force (along oil pipe radial direction) of extruding can change the specification form of anterior reducing glue core, make anterior reducing glue core produce distortion, realize anterior reducing glue core reducing, thereby the annular space between sealing oil pipe and sleeve pipe, realizes sealing Oil/gas Well.In the time that hydraulic oil enters cylinder barrel unlatching chamber, left and right, promote piston and retreat and drive the flashboard assembly of reducing to leaving the motion of well head center position, open Oil/gas Well, anterior reducing glue core returns to again nature.The flashboard assembly switch of reducing is by the reversal valve control of the hydraulic control unit of hydraulic system.Like this, the hydraulic flashboard blowout preventer of its reducing sealing can seal the tubing string of different specification size by the flashboard total performance of one group reducing, realize reducing sealing, thereby reach the purpose of this utility model.

Owing to adopting technique scheme, the hydraulic flashboard blowout preventer of its reducing sealing can seal the tubing string of different specification size by the flashboard total performance of one group reducing, realize reducing sealing, and simple in structure, easy for installation; Greatly improve workman's labor productivity, stopped to produce new potential safety hazard.

Brief description of the drawings

Below in conjunction with embodiment, the hydraulic flashboard blowout preventer of the utility model reducing sealing is further described.

The structural representation of the hydraulic flashboard blowout preventer of the reducing sealing that accompanying drawing 1 is the embodiment of the hydraulic flashboard blowout preventer of the utility model reducing sealing.

The structural representation of the anterior reducing glue core of the hydraulic flashboard blowout preventer of the reducing sealing that accompanying drawing 2 is the embodiment of the hydraulic flashboard blowout preventer of the utility model reducing sealing.

The structure dissection figure of the anterior reducing glue core of the hydraulic flashboard blowout preventer of the reducing sealing that accompanying drawing 3 is the embodiment of the hydraulic flashboard blowout preventer of the utility model reducing sealing.

The special-shaped cam structure schematic diagram of the ironware of the anterior reducing glue core of the hydraulic flashboard blowout preventer of the reducing sealing that accompanying drawing 4 is the embodiment of the hydraulic flashboard blowout preventer of the utility model reducing sealing.

The perspective view of the anterior reducing glue core of the hydraulic flashboard blowout preventer of the reducing sealing that accompanying drawing 5 is the embodiment of the hydraulic flashboard blowout preventer of the utility model reducing sealing.

The structural representation of the variable bore ram body of the hydraulic flashboard blowout preventer of the reducing sealing that accompanying drawing 6 is the embodiment of the hydraulic flashboard blowout preventer of the utility model reducing sealing.

In figure: 1, hydraulic cylinder 2, cylinder barrel bolt 3, cylinder cap 4, side door bolt 5, side door 6, housing 7, anterior reducing glue core 8, the flashboard assembly 9 of reducing, piston rod 10, cylinder barrel 11, piston 12, screw mandrel 13, port connection 14, flange 15, top glue core 16, reducing colloid 17, front glue plane 18, interface 19, ironware 20, the structure 21 of semi-ring body, semicircular inwall side face 22, parallels 23, motion bar 24, connecting rod 25, rear glue plane 26, the outer end 27 of the main body bar of connecting rod, stretch out tail 28, stretched head 29, guide groove 30, variable bore ram body 31, box structure 32, the blind hole 33 of the connection top glue core in the groove bottom of side seal groove, arc seal groove 34, middle inner face 35 on bottom opening sheet, side inner face 36 on bottom opening sheet, top opening sheet 37, centering gathering sill 38, inner plane 39, the blind hole 40 of the anterior reducing glue of the connection core on inner plane, the opening 41 of the arc of the anteriomedial of opening sheet, center peripheral wall surfaces 42, water jacket 43, front facial planes 44, hatch frame 45, centering guiding oblique angle 46, outer ring 47, side inner face 48 on top opening sheet, the outer wall 49 of the head of special-shaped cam, the lateral surface 50 of special-shaped cam, the shortwall plane 51 of special-shaped cam, the outside wall surface 52 of the arc curve of special-shaped cam, the tail wall plane 53 of special-shaped cam, the longwell plane 54 of special-shaped cam, the medial surface 55 of special-shaped cam, the outside wall surface of " s " shape of the afterbody of special-shaped cam

Detailed description of the invention

In figure: the hydraulic flashboard blowout preventer of reducing sealing adopts hydraulic-driven, belongs to hydraulic flashboard blowout preventer.The hydraulic flashboard blowout preventer of reducing sealing comprises flashboard assembly (8), side door (5), side door bolt (4), the port connection (13) of housing (6), hydraulic cylinder (1), reducing, and the hydraulic flashboard blowout preventer of reducing sealing also comprises sealing mechanism, the hydraulic flashboard blowout preventer of reducing sealing is symmetrical structure, and its left side structure is identical and symmetrical with the specification framework of right side structure, housing comprises body and flange arrangement, body is rectangular structure, the center of body is the main through hole of hollow circular configuration, flange arrangement comprises neck flange and flange (14), on housing, there are two flange arrangements, two flange arrangements lay respectively at the both sides of body, the intermediate throughholes of two flange arrangement interlinks with main through hole respectively, 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, side through hole communicates with main through hole respectively, its side through hole constitutes the structure of a pair of side through hole in pairs, same side through hole side through hole is positioned to 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 (10) and cylinder cap (3), piston (11) and piston rod (9), screw mandrel (12), cylinder barrel bolt (2) 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, the center line of top plane and piston hangs down certainly, 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 two side plane arrives respectively 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 structure comprises groove bottom and groove side, 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.Between the side through hole of hydraulic cylinder, side door and housing, complement one another, the quantity correspondence of the side through hole of hydraulic cylinder, side door and housing is identical, between hydraulic cylinder and side door and housing, is connected.Syndeton between hydraulic cylinder and side door and housing, be that piston rod packs in the middle hole of side door, piston is 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, side door is covered on side through hole, and cylinder cap and cylinder barrel are fixed together by cylinder barrel bolt and side door, and the sealing between side door and cylinder barrel adopts y-shaped ring to realize two way seal.The sealing mechanism of the hydraulic flashboard blowout preventer of reducing sealing comprises sealing between side door and housing and the sealing of oil circuit.Two oil circuit holes independently separately distribute in the body of housing, there are a collar extension and two oil circuit apertures in its oil circuit hole independently, collar extension is positioned on body lateral surface, two oil circuit apertures lay respectively at the outside of same two side through hole to side through hole of housing, the oil circuit aperture in the oil circuit hole of the body of housing coordinates corresponding connection with the oil circuit aperture of side door, and the collar extension in the oil circuit hole of the body of its housing is fixedly connected with port connection; There are two oil circuit apertures in the outside of side through hole, and its two oil circuits aperture belongs to respectively two oil circuit holes, and its two oil circuit holes are respectively the oil circuit hole that oil circuit hole that control piston advances and control piston retreat; 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 from the centre 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, the oil circuit aperture of the centre of the inner side in the oil circuit hole of cylinder cap is led in cylinder barrel, in its side door, there is the oil circuit hole of two break-through side doors, the two oil circuit apertures in an oil circuit hole of side door interlink with the oil circuit hole sealing that another oil circuit aperture in oil circuit hole and the control piston of housing of cylinder barrel advance respectively, and the oil circuit hole sealing that the control piston of another of side door oil circuit hole and housing retreats interlinks and leads in cylinder barrel; Each parts are successively installed and have been connected according to program respectively, have rubber seal rings for seal to connect between its mutual direct-connected oil circuit aperture, form the oil circuit of independent completion sealing.The sealing of oil circuit comprises the sealing of the oil circuit hole collar extension of sealing between mutual direct-connected oil circuit aperture and port connection and housing.The flashboard assembly of reducing belongs to the one of half envelope flashboard assembly, and the flashboard assembly of reducing comprises flashboard body and seal; Seal comprises top glue core (15), anterior reducing glue core (7), and top glue core also claims top sealing, and anterior reducing glue core also claims front reducing sealing; The flashboard body of the flashboard assembly of reducing matches with top glue core, anterior reducing glue core, and the flashboard body of the flashboard assembly of its reducing is referred to as variable bore ram body; Anterior reducing glue core is made up of agent structure and external ear, its agent structure is the structure of semi-toroidal shape, left and right two head part of its agent structure are protruded the external ear that forms symmetrical bulk shape not laterally, thereby, the head of its agent structure and external ear are interconnected to form the head of anterior reducing glue core, and anterior reducing glue core has two heads; Anterior reducing glue core comprises reducing colloid (16), ironware (19), parallels (22), motion bar (23), connecting rod (24); Reducing colloid is the carrier of ironware, parallels, motion bar, connecting rod, and ironware, parallels, motion bar, connecting rod are incorporated into respectively among reducing colloid.Anterior reducing glue core comprises six ironwares, four parallels, two motion bars and two connecting rods; Anterior reducing glue core is by the disposable sulfuration and become an entirety in mould of six ironwares, four parallels, two motion bars and two connecting rods and rubber.Ironware is the structure of special-shaped cam, ironware is made up of two special-shaped cams and connector, the end of ironware is special-shaped cam, special-shaped cam comprises head, middle part and afterbody, special-shaped cam is the structure of narrow " V " shape leaf lobe shape of head, special-shaped cam has lateral surface (49) and medial surface (54), and lateral surface and the medial surface of special-shaped cam are parallel to each other, the outer wall (48) of the head of special-shaped cam is arc-shaped surface, the outer wall of the head of its special-shaped cam respectively with lateral surface and the crossing connection of medial surface of special-shaped cam, the middle part of special-shaped cam have two respectively with lateral surface and the medial surface wall plane being connected that intersects vertically, two wall plane apportion both sides, two wall planes respectively with the crossing connection in two ends of the outer wall of head, in two wall planes, the short wall plane of its length is referred to as shortwall plane, the wall plane that its length is long is referred to as longwell plane, the afterbody of special-shaped cam is convex-concave curved configuration, the afterbody of special-shaped cam comprises the outside wall surface (55) of " s " shape, the outside wall surface (51) of arc curve and tail wall plane (52), the outside wall surface of " s " shape, the outside wall surface of arc curve and tail wall plane are respectively with the lateral surface of special-shaped cam with medial surface is crossing is connected, one end of the outside wall surface of " s " shape connects longwell plane (53), the other end of the outside wall surface of " s " shape connects tail wall plane, one end of the outside wall surface of arc connects shortwall plane (50), the other end of the outside wall surface of arc connects tail wall plane, like this, tail wall interplanar is in the outside wall surface of " s " shape, between the outside wall surface of arc, and respectively with the outside wall surface of " s " shape, the outside wall surface of arc curve intersects and connects, the inner side of the affiliated plane that is positioned at longwell plane of the outside wall surface of " s " shape, the protrusion of the outside wall surface of arc curve and be positioned at the outside of the affiliated plane of shortwall plane, like this, the interior angle of the affiliated plane of tail wall plane and the affiliated Plane intersects of shortwall plane is obtuse angle, and the interior angle of the affiliated plane of tail wall plane and the affiliated Plane intersects of longwell plane is acute angle, connector is flat bar structure, and connector has two lateral surfaces and two arc surfaces, and two lateral surfaces of connector are parallel to each other, lateral surface between two arc surfaces, arc surface respectively with two crossing connections of lateral surface, connector two connects respectively special-shaped cam, the medial surface of special-shaped cam intersects vertically and is connected with connector, the center line of its connector is parallel and vertical with medial surface with the lateral surface of special-shaped cam with two lateral surfaces of connector respectively, and two special-shaped cams are positioned at respectively two outsides of connector symmetrically, an arc surface of connector and the head of special-shaped cam are in the same side, and another arc surface of connector and the afterbody of special-shaped cam are in the same side.Anterior reducing glue core has six ironwares, six ironwares are incorporated into respectively among reducing colloid, six ironware spaces, evenly forward, ordered arrangement, the center line of the connector of its each ironware is parallel to each other and respectively on same circular arc, spacing distance between the center line of the connector of each ironware is identical, the lateral surface of the special-shaped cam that is positioned at the same side of its each ironware at grade, the medial surface of the special-shaped cam that is positioned at the same side of each ironware at grade, thereby six ironwares form the assembly of the frame construction of semi-ring form, assembly belongs to a part for anterior reducing glue core agent structure, two special-shaped cams of same ironware lay respectively at the skin of the both sides of anterior reducing glue core agent structure.Its ironware is longitudinally erected in reducing colloid inside, the head of the special-shaped cam of ironware is positioned at inner side, the afterbody of the special-shaped cam of ironware is positioned at outside, the head of ironware does not point to the arc core line of the circular arc at the center line place of the connector of each ironware, its arc core line refers to through the arc core of the circular arc at the center line place of the connector of its ironware the center line parallel with the center line of the connector of each ironware respectively, ironware is tiltedly to its arc core line, and the head of the special-shaped cam of ironware refers to a side of arc core line partially; Interval between the head of the special-shaped cam of its six ironwares is identical, and same, the interval between the afterbody of the special-shaped cam of its six ironwares is identical.Parallels is rectangle structure, and there is through hole the centre of parallels, and its through hole has two relative inwall side planes that are parallel to each other and two relative arc inner wall faces, the inwall side plane that the be parallel to each other crossing connection relative with two respectively of arc inner wall face; Motion bar is columniform bar, and it comprises mobile jib and bar head, and bar head has two, mobile jib two ends are connecting-rod cap respectively, mobile jib and bar head are respectively cylindrical shape, and the diameter of mobile jib is greater than the diameter of bar head, and the center line of mobile jib and bar head and motion bar is on same straight line.Connecting rod is interconnected to constitute by main body bar and major part, main body bar is cylindrical shape, there is through hole the outer end of the main body bar of its connecting rod, its through hole has two relative inwall side planes that are parallel to each other and two relative arc inner wall faces, the inwall side plane that the be parallel to each other crossing connection relative with two respectively of arc inner wall face; On major part, there are an outer side plane and breach, its outer side plane is parallel with the inwall side plane of the through hole of main body bar, its breach is the opening of the shape of arc side face, and the arc core line of the arc side face of its breach is with outside plane parallel, and its arc core line is vertical with main body bar center line.The head of anterior reducing glue core has two glue planes that are parallel to each other, wherein, a glue plane is front glue plane (17) before head, another glue plane back side after head is rear glue plane (25), the front glue plane of two heads of anterior reducing glue core at grade, its place plane is vertical with the longitudinal middle tangent plane of anterior reducing glue core, and the rear glue plane of two heads of anterior reducing glue core at grade.Its motion bar is longitudinally erected in the inside of the head of anterior reducing glue core, and be erected in the outside of assembly, the center line of the center line of motion bar and the connector of ironware is parallel to each other, the bar head of motion bar one end puts in the through hole of a parallels, the bar head of the motion bar other end puts in the through hole of another parallels, between its motion bar and parallels, be connected, the center line of motion bar is vertical with the lateral surface of two parallels respectively, motion bar and connecting rod interconnect, connecting rod links the mobile jib of motion bar by the breach on its major part, make the center line of main body bar and the center line of motion bar of connecting rod vertical, and the center line of the main body bar of connecting rod divides the vertical distance of the lateral surface that is clipped to two parallels to equate, the outer end (26) of the main body bar of connecting rod is stretched out reducing colloid (16) backward, stretch out the rear glue plane of the head of anterior reducing glue core, thereby, its motion bar and with direct-connected two parallels of its motion bar, connecting rod forms a grip assembly, one head of its anterior reducing glue core comprises a grip assembly, and another head of its anterior reducing glue core comprises another set of assembly, its be positioned at the same side of anterior reducing glue core two parallels lateral surface at grade, the center line of the main body bar of two connecting rod is parallel to each other, and the center line of the main body bar of two connecting rods divides the vertical distance of the longitudinal middle tangent plane that is clipped to anterior reducing glue core to equate.The agent structure of anterior reducing glue core comprises outer ring (46) and the semicircular inner ring of arc, outer ring is intersected and is connected glue plane after two, inner ring intersects and connects two front glue planes, the arc core line of the arc core line of outer ring and the arc core line of inner ring and assembly is same straight line, and its arc core line is in the affiliated plane of longitudinal middle tangent plane of anterior reducing glue core; Its inner ring is sandwiched between the affiliated plane of medial surface of two special-shaped cams of same ironware, and the longitudinal middle tangent plane of the longitudinally middle tangent plane of inner ring and anterior reducing glue core is same plane.The inner ring of the agent structure of anterior reducing glue core adopts the inwardly structure of the semi-ring body (20) of each special-shaped cam of outstanding assembly of semicircular inwall side face (21).Two heads of anterior reducing glue core, one is the head that has two interfaces, one for there being the head of two guide grooves; At the head that has two interfaces of anterior reducing glue core, two special-shaped cams of the ironware of one end of its assembly stretch out respectively corresponding front glue plane, a part for the head that the part of stretching out front glue plane of its special-shaped cam is its special-shaped cam, the part of stretching out front glue plane of its special-shaped cam is referred to as stretched head (28), stretched head is two, and the interface (18) of the head of its anterior reducing glue core is in front glue plane; At the head that has two guide grooves of anterior reducing glue core, two special-shaped cams of the ironware of the other end of its assembly stretch out respectively corresponding its front glue plane, a part for the afterbody that the part of stretching out front glue plane of its special-shaped cam is its special-shaped cam, two special-shaped cams of the ironware of this end of its assembly respectively and between inner ring and front glue plane, produce the breach of two dihedrals, its breach is guide groove (29), the part of stretching out front glue plane of the special-shaped cam of this end of its assembly is referred to as to stretch out tail (27), and stretching out tail is two; Its semi-ring body is the each special-shaped cam of outstanding assembly inwardly, its semi-ring body is sandwiched between the affiliated plane of medial surface of two special-shaped cams of same ironware, semi-ring body longitudinally in the middle of in the middle of tangent plane and anterior reducing glue core longitudinal tangent plane be same plane, the part at the head of two special-shaped cams of each ironware of assembly whole and the middle part that is inconjunction with thereof is inwardly tiltedly stretched out respectively the inwall side face of inner ring; Parallels protrudes the agent structure of anterior reducing glue core, be positioned at the outside of the affiliated plane of the lateral surface of special-shaped cam, interlaced between the special-shaped cam of parallels and the ironware in the head of anterior reducing glue core, partially overlap, its parallels is positioned at the skin of the head of anterior reducing glue core, and the head that connects the agent structure of anterior reducing glue core, parallels belongs to a part for external ear.Variable bore ram body (30) complements one another with seal and is connected.On variable bore ram body, there is hatch frame, hatch frame (44) is positioned at the front portion of variable bore ram body, hatch frame and anterior reducing glue core adapt to, match, hatch frame comprises two opening sheets, the anteriomedial of opening sheet has the opening of arc, its opening both sides are respectively front facial planes, before two facial planes respectively with the crossing connection of internal perisporium face of the opening (40) of the arc of the anteriomedial of opening sheet, two front facial planes at grade, the arc core line of the internal perisporium face of opening and the middle tangent plane of variable bore ram body are at grade, front facial planes (43) is mutually vertical with the middle tangent plane of variable bore ram body, opening sheet has middle inner face and two side inner faces, the both sides of inner face in the middle of two side inner faces lay respectively at, two side inner faces at grade, middle inner face is parallel with side inner face, middle inner face is mutually vertical with the arc core line of the internal perisporium face of opening, middle inner face protrudes from side inner face, thereby between inner face and side inner face, connect by side in the middle of it, its side is connected with middle inner face is vertical with side inner face respectively, two opening sheets are respectively top opening sheet (36) and bottom opening sheet, the middle inner face (34) of the middle inner face of top opening sheet and bottom opening sheet is relative and be parallel to each other, the side inner face (47) of top opening sheet is relative with the side inner face (35) of bottom opening sheet and be parallel to each other, and the arc core line of the internal perisporium face of the opening of two opening sheets is on same straight line, between the middle inner face of two opening sheets, there is the internal perisporium face of arc to connect, the internal perisporium face of its arc is referred to as center peripheral wall surfaces, the arc core line of the arc core line of its center peripheral wall surfaces and the internal perisporium face of opening is on same straight line, the diameter of its center peripheral wall surfaces is greater than the diameter of the internal perisporium face of opening, center peripheral wall surfaces (41) respectively with the crossing connection of middle inner face of two opening sheets, there is respectively inner plane the both sides of center peripheral wall surfaces, two inner planes at grade, inner plane and anterior plane parallel, inner plane connection crossing with center peripheral wall surfaces, between inner plane and side inner face, be connected by interior lead angle, arc seal groove (33) is arranged at the top of variable bore ram body, arc seal groove comprises intermediate seal groove and side seal groove, two side seal grooves lay respectively at the both sides of intermediate seal groove, intermediate seal groove is connected with both sides sealing groove respectively, the degree of depth of intermediate seal groove is less than the degree of depth of side seal groove, the groove bottom of intermediate seal groove is parallel with the groove bottom of side seal groove, the groove bottom of intermediate seal groove is parallel with middle inner face, the groove bottom of side seal groove intersects vertically and is connected with inner plane, the groove bottom of the side seal groove on earth vertical distance of the side inner face of opening sheet is less than the side inner face vertical distance of the side inner face of opening sheet on earth of top opening sheet, make the groove bottom of side seal groove, between the side inner face of inner plane and top opening sheet, form a breach, on inner plane (38), have the blind hole (39) that connects anterior reducing glue core, its blind hole center line is vertical with inner plane, the groove bottom of side seal groove has the blind hole (32) that connects top glue core, and its blind hole center line is vertical with the groove bottom of side seal groove, and two blind holes intersections communicate, on the bottom opening sheet of variable bore ram body, there are centering guiding oblique angle and centering gathering sill, on bottom opening sheet, have the water jacket (42) that connects centering guiding oblique angle, centering guiding oblique angle is fixedly connected on the water jacket that connects centering guiding oblique angle, and the fixed connection structure of centering guiding oblique angle and water jacket adopts headless screw syndeton, on its bottom opening sheet, there are two through holes, the center line of its through hole is vertical with the middle inner face on bottom opening sheet, two through hole communicates with water jacket respectively, its through hole is female thread structure, on centering guiding oblique angle, have and two the corresponding internal thread holes that match of two through holes on bottom opening sheet, be fastenedly connected respectively bottom opening sheet and centering guiding oblique angle by headless screw, centering guiding oblique angle is fixedly connected on water jacket.Like this, anterior reducing glue core cooperatively interacts and is connected with variable bore ram body, its anterior reducing glue core is pressed and is sandwiched between the top opening sheet and bottom opening sheet of hatch frame of variable bore ram body, and the main body bar that the connecting rod of reducing colloid is stretched out in the outer end of the main body bar of the connecting rod of anterior reducing glue core injects in the blind hole of the anterior reducing glue of connection core of variable bore ram body completely; Top glue core presses embedding to be sandwiched in the arc seal groove at top of variable bore ram body, and the connecting rod that stretches out Jiao Xin top, top colloid of its top glue core injects in the blind hole of connection top glue core of variable bore ram body completely; Make the connecting rod of its top glue core cooperatively interact and be connected with the connecting rod of anterior reducing glue core, the connecting rod of its top glue core injects in the through hole of outer end of the main body bar of the connecting rod of anterior reducing glue core.Like this, its top glue core and anterior reducing glue core are attached to respectively on variable bore ram body, and Jiao Xin two, top cooperatively interacts and links together with two heads of anterior reducing glue core respectively, and forms confined space, thereby, the flashboard assembly of formation reducing.The diameter of the internal perisporium face of the arc of the opening sheet of variable bore ram body is greater than the diameter of the semi-ring body of anterior reducing glue core.On variable bore ram body, there is box structure, box structure (31) is positioned at the back part of variable bore ram body, box structure matches with the pin thread structure of the outer end of piston rod, it is protruding straight trough, it is made up of inside groove and water jacket, there is protruding straight trough in the outside that is variable bore ram body, laterally break-through pedestal, its groove bottom is plane, protruding straight trough 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 variable bore ram body, 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 variable bore ram body, vertical distance between two groove sides of the inside groove of the protruding straight trough 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 variable bore ram body equates, the flashboard assembly of reducing has two, and the flashboard assembly of two reducings complements one another into the flashboard assembly of a set of reducing, and like this, its corresponding top glue core has two, and two top glue cores complement one another into a set of top glue core, its corresponding anterior reducing glue core also has two, and two anterior reducing glue cores complement one another into a set of anterior reducing glue core, and in its a set of anterior reducing glue core, two anterior reducing glue cored structures are identical, variable bore ram body also has two, two a set of variable bore ram bodies of the supporting one-tenth of variable bore ram body, in the time that the flashboard assembly of two reducings docks mutually, the flashboard assembly of two reducings of the flashboard assembly of a set of reducing complements each other to form a unified overall structure, in two variable bore ram bodies of a set of variable bore ram body, centering guiding oblique angle (45) on two variable bore ram bodies cooperatively interacts with centering gathering sill (37), make its centering guiding oblique angle inject mutually corresponding centering gathering sill, in two anterior reducing glue cores of a set of anterior reducing glue core, the head that has two interfaces on two anterior reducing glue cores cooperatively interacts and docks with the head that has two guide grooves respectively, it is stretched head and the guide groove on two anterior reducing glue cores respectively, stretch out tail and interface cooperatively interacts, make stretched head inject mutually corresponding guide groove, stretch out tail and inject mutually corresponding interface, and in its a set of anterior reducing glue core, the lateral surface of the special-shaped cam that is positioned at the same side of each ironware of two anterior reducing glue cores at grade.The hydraulic flashboard blowout preventer of reducing sealing is symmetrical structure, housing is a pair of side through hole structure, one is to installing respectively the flashboard assembly of reducing in two of side through hole side through hole, the flashboard assembly of the reducing in the same a pair of left and right side through hole of housing complements one another, relative between two, and in the through hole of the same side, box structure on the variable bore ram body of the flashboard assembly of the pin thread structure reeve reducing of its corresponding piston rod is interior and mutually identical, the flashboard assembly that the flashboard assembly of two reducing complementing one another is a set of reducing; The be tightly connected hydraulic oil pipeline of hydraulic system of port connection, in the time that hydraulic control system hydraulic oil enters the left and right cylinder barrel of flashboard assembly of controlling reducing and closes chamber, promote piston-advance and drive the flashboard assembly of left and right reducing to move to well head center respectively along the side through hole of housing, the flashboard assembly of two reducings docks mutually, in the time that tubing diameter is greater than the format diameter of the anterior reducing glue core under nature, its multiple ironwares end touches the surface of oil pipe, has produced mutual thrust (along oil pipe radial direction) simultaneously.The stressed extruding of ironware is outwards moved, simultaneously the connector of special-shaped cam structure produces and rotatablely moves, inner ring contacts and is extruded with the appearance of oil pipe, in the time that the active force (along oil pipe radial direction) of extruding increases to the specification form that can change anterior reducing glue core, make anterior reducing glue core produce distortion, realize anterior reducing glue core reducing, thereby the annular space between sealing oil pipe and sleeve pipe, realizes sealing Oil/gas Well; In the time that tubing diameter is less than the format diameter of anterior reducing glue core under nature, ironware and rubber are subject to the effect of variable bore ram body simultaneously, extruding is to internal motion, oil pipe surface is formed and surrounds extruding, in the time that the active force (along oil pipe radial direction) of extruding can change the specification form of anterior reducing glue core, make anterior reducing glue core produce distortion, realize anterior reducing glue core reducing, thereby the annular space between sealing oil pipe and sleeve pipe, realizes sealing Oil/gas Well.In the time that hydraulic oil enters cylinder barrel unlatching chamber, left and right, promote piston and retreat and drive the flashboard assembly of reducing to leaving the motion of well head center position, open Oil/gas Well, anterior reducing glue core returns to again nature.Flashboard assembly switch is by the reversal valve control of the hydraulic control unit of hydraulic system.

Claims (8)

1. a hydraulic flashboard blowout preventer for reducing sealing, it is the well controlled blowout-proof device that oilfield downhole operation uses, it adopts hydraulic-driven, belongs to hydraulic flashboard blowout preventer, the hydraulic flashboard blowout preventer of reducing sealing comprises flashboard assembly, side door, side door bolt, the port connection of housing, hydraulic cylinder, reducing, and the hydraulic flashboard blowout preventer of reducing sealing also comprises sealing mechanism, the hydraulic flashboard blowout preventer of reducing sealing is symmetrical structure, and its left side structure is identical and symmetrical with the specification framework of right side structure, housing comprises body and flange arrangement, body is rectangular structure, the center of body is the main through hole of hollow circular configuration, flange arrangement comprises neck flange and ring flange, on housing, there are two flange arrangements, two flange arrangements lay respectively at the both sides of body, the intermediate throughholes of two flange arrangement interlinks with main through hole respectively, 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, side through hole communicates with main through hole respectively, its side through hole constitutes the structure of a pair of side through hole in pairs, same side through hole side through hole is positioned to 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 range that its two side plane arrives respectively 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 structure comprises groove bottom and groove side, 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, between the side through hole of hydraulic cylinder, side door and housing, complement one another, the quantity correspondence of the side through hole of hydraulic cylinder, side door and housing is identical, between hydraulic cylinder and side door and housing, is connected, syndeton between hydraulic cylinder and side door and housing, be that piston rod packs in the middle hole of side door, piston is 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 comprise 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, side door is covered on side through hole, and cylinder cap and cylinder barrel are fixed together by cylinder barrel bolt and side door, and the sealing between side door and cylinder barrel adopts y-shaped ring to realize two way seal; The sealing mechanism of the hydraulic flashboard blowout preventer of reducing sealing comprises sealing between side door and housing and the sealing of oil circuit; Two oil circuit holes independently separately distribute in the body of housing, there are a collar extension and two oil circuit apertures in its oil circuit hole independently, collar extension is positioned on body lateral surface, two oil circuit apertures lay respectively at the outside of same two side through hole to side through hole of housing, the oil circuit aperture in the oil circuit hole of the body of housing coordinates corresponding connection with the oil circuit aperture of side door, and the collar extension in the oil circuit hole of the body of its housing is fixedly connected with port connection; There are two oil circuit apertures in the outside of side through hole, and its two oil circuits aperture belongs to respectively two oil circuit holes, and its two oil circuit holes are respectively the oil circuit hole that oil circuit hole that control piston advances and control piston retreat; 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 from the centre 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, the oil circuit aperture of the centre of the inner side in the oil circuit hole of cylinder cap is led in cylinder barrel, in its side door, there is the oil circuit hole of two break-through side doors, the two oil circuit apertures in an oil circuit hole of side door interlink with the oil circuit hole sealing that another oil circuit aperture in oil circuit hole and the control piston of housing of cylinder barrel advance respectively, and the oil circuit hole sealing that the control piston of another of side door oil circuit hole and housing retreats interlinks and leads in cylinder barrel; Each parts are successively installed and have been connected according to program respectively, have rubber seal rings for seal to connect between its mutual direct-connected oil circuit aperture, form the oil circuit of independent completion sealing; The sealing of oil circuit comprises the sealing of the oil circuit hole collar extension of sealing between mutual direct-connected oil circuit aperture and port connection and housing; The flashboard assembly of the hydraulic flashboard blowout preventer equipment reducing of reducing sealing, the flashboard assembly of reducing belongs to the one of half envelope flashboard assembly; The flashboard assembly of reducing comprises flashboard body and seal; Seal comprises top glue core, anterior reducing glue core, and top glue core also claims top sealing, and anterior reducing glue core also claims front reducing sealing; The flashboard body of the flashboard assembly of reducing matches with top glue core, anterior reducing glue core, and the flashboard body of the flashboard assembly of its reducing is referred to as variable bore ram body; Anterior reducing glue core is made up of agent structure and external ear, its agent structure is the structure of semi-toroidal shape, left and right two head part of its agent structure are protruded the external ear that forms symmetrical bulk shape not laterally, thereby, the head of its agent structure and external ear are interconnected to form the head of anterior reducing glue core, and anterior reducing glue core has two heads; Anterior reducing glue core comprise reducing colloid, ironware, parallels,Motion bar, connecting rod, the head of anterior reducing glue core has two glue planes that are parallel to each other, wherein, a glue plane is front glue plane before head, another glue plane back side after head is rear glue plane, the front glue plane of two heads of anterior reducing glue core at grade, its place plane is vertical with the longitudinal middle tangent plane of anterior reducing glue core, and the rear glue plane of two heads of anterior reducing glue core at grade, anterior reducing glue core comprises multiple ironwares, four parallels, two motion bars and two connecting rods, the agent structure of anterior reducing glue core comprises outer ring and the semicircular inner ring of arc, outer ring is intersected and is connected glue plane after two, inner ring intersects and connects two front glue planes, the arc core line of the arc core line of outer ring and the arc core line of inner ring and assembly is same straight line, and its arc core line is in the affiliated plane of longitudinal middle tangent plane of anterior reducing glue core, variable bore ram body complements one another with seal and is connected, on variable bore ram body, there is hatch frame, hatch frame is positioned at the front portion of variable bore ram body, hatch frame and anterior reducing glue core adapt to, match, hatch frame comprises two opening sheets, the anteriomedial of opening sheet has the opening of arc, its opening both sides are respectively front facial planes, before two facial planes respectively with the crossing connection of internal perisporium face of the opening of the arc of the anteriomedial of opening sheet, two front facial planes at grade, the arc core line of the internal perisporium face of opening and the middle tangent plane of variable bore ram body are at grade, front facial planes is mutually vertical with the middle tangent plane of variable bore ram body, opening sheet has middle inner face and two side inner faces, two opening sheets are respectively top opening sheet and bottom opening sheet, the middle inner face of top opening sheet is relative with the middle inner face of bottom opening sheet and be parallel to each other, the side inner face of top opening sheet is relative with the side inner face of bottom opening sheet and be parallel to each other, and the arc core line of the internal perisporium face of the opening of two opening sheets is on same straight line, between the middle inner face of two opening sheets, there is the internal perisporium face of arc to connect, the internal perisporium face of its arc is referred to as center peripheral wall surfaces, the arc core line of the arc core line of its center peripheral wall surfaces and the internal perisporium face of opening is on same straight line, the diameter of its center peripheral wall surfaces is greater than the diameter of the internal perisporium face of opening, center peripheral wall surfaces respectively with the crossing connection of middle inner face of two opening sheets, there is respectively inner plane the both sides of center peripheral wall surfaces, two inner planes at grade, inner plane and anterior plane parallel, inner plane connection crossing with center peripheral wall surfaces, between inner plane and side inner face, be connected by interior lead angle, arc seal groove is arranged at the top of variable bore ram body, arc seal groove comprises intermediate seal groove and side seal groove, two side seal grooves lay respectively at the both sides of intermediate seal groove, intermediate seal groove is connected with both sides sealing groove respectively, the degree of depth of intermediate seal groove is less than the degree of depth of side seal groove, the groove bottom of intermediate seal groove is parallel with the groove bottom of side seal groove, the groove bottom of intermediate seal groove is parallel with middle inner face, the groove bottom of side seal groove intersects vertically and is connected with inner plane, the groove bottom of the side seal groove on earth vertical range of the side inner face of opening sheet is less than the side inner face vertical range of the side inner face of opening sheet on earth of top opening sheet, on inner plane, have the blind hole that connects anterior reducing glue core, its blind hole center line is vertical with inner plane,The groove bottom of side seal groove has the blind hole that connects top glue core, and its blind hole center line is vertical with the groove bottom of side seal groove, and two blind holes intersections communicate, on the bottom opening sheet of variable bore ram body, there are centering guiding oblique angle and centering gathering sill, on bottom opening sheet, have the water jacket that connects centering guiding oblique angle, centering guiding oblique angle is fixedly connected on water jacket, and the fixed connection structure of centering guiding oblique angle and water jacket adopts Welding Structure or adopts headless screw syndeton, in the time adopting headless screw syndeton, on its bottom opening sheet, there are two through holes, the center line of its through hole is vertical with the middle inner face on bottom opening sheet, two through hole communicates with water jacket respectively, its through hole is female thread structure, on centering guiding oblique angle, have and two the corresponding internal thread holes that match of two through holes on bottom opening sheet, be fastenedly connected respectively bottom opening sheet and centering guiding oblique angle by headless screw, centering guiding oblique angle is connected on water jacket together surely, like this, anterior reducing glue core cooperatively interacts and is connected with variable bore ram body, its anterior reducing glue core is pressed and is sandwiched between the top opening sheet and bottom opening sheet of hatch frame of variable bore ram body, and the main body bar that the connecting rod of reducing colloid is stretched out in the outer end of the main body bar of the connecting rod of anterior reducing glue core injects in the blind hole of the anterior reducing glue of connection core of variable bore ram body completely, top glue core presses embedding to be sandwiched in the arc seal groove at top of variable bore ram body, and the connecting rod that stretches out Jiao Xin top, top colloid of its top glue core injects in the blind hole of connection top glue core of variable bore ram body completely, make the connecting rod of its top glue core cooperatively interact and be connected with the connecting rod of anterior reducing glue core, the connecting rod of its top glue core injects in the through hole of outer end of the main body bar of the connecting rod of anterior reducing glue core, like this, its top glue core and anterior reducing glue core are attached to respectively on variable bore ram body, and Jiao Xin two, top cooperatively interacts and links together with two heads of anterior reducing glue core respectively, and forms confined space, thereby, the flashboard assembly of formation reducing, the diameter of the internal perisporium face of the arc of the opening sheet of variable bore ram body be greater than anterior reducing glue core inner ring semicircular inwall side face diameter or be greater than the diameter of the semi-ring body of anterior reducing glue core, on variable bore ram body, there is box structure, box structure is positioned at the back part of variable bore ram body, box structure matches with the pin thread structure of the outer end of piston rod, it is protruding straight trough, it is made up of inside groove and water jacket, there is protruding straight trough in the outside that is variable bore ram body, laterally break-through pedestal, its groove bottom is plane, protruding straight trough comprises inside groove and water jacket, the width of its inside groove is greater than the width of water jacket, vertical range between two groove bottom of two groove structures at the top of the pin thread structure of the vertical range 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 variable bore ram body, the pin thread structure top plane of the outer end of piston rod is identical to the degree of depth of the vertical range of groove side adjacent with top plane of groove structure and the inside groove of the box structure of variable bore ram body, vertical range between two groove sides of the inside groove of the protruding straight trough of the vertical range between two side planes of the pin thread structure of the outer end of piston rod and the box structure of variable bore ram body equates,The flashboard assembly of reducing has two, and the flashboard assembly of two reducings complements one another into the flashboard assembly of a set of reducing, and like this, its corresponding top glue core has two, and two top glue cores complement one another into a set of top glue core, its corresponding anterior reducing glue core also has two, and two anterior reducing glue cores complement one another into a set of anterior reducing glue core, and in its a set of anterior reducing glue core, two anterior reducing glue cored structures are identical, variable bore ram body also has two, two a set of variable bore ram bodies of the supporting one-tenth of variable bore ram body, in the time that the flashboard assembly of two reducings docks mutually, the flashboard assembly of two reducings of the flashboard assembly of a set of reducing complements each other to form a unified overall structure, in two variable bore ram bodies of a set of variable bore ram body, centering guiding oblique angle and centering gathering sill on two variable bore ram bodies cooperatively interact, make its centering guiding oblique angle inject mutually corresponding centering gathering sill, the hydraulic flashboard blowout preventer of reducing sealing is symmetrical structure, housing is a pair of side through hole structure, one is to installing respectively the flashboard assembly of reducing in two of side through hole side through hole, on a same a pair of left side for housing, the flashboard assembly of the reducing in the through hole of right side complements one another, relative between two, and in the through hole of the same side, box structure on the variable bore ram body of the flashboard assembly of the pin thread structure reeve reducing of its corresponding piston rod is interior and mutually identical, the flashboard assembly that the flashboard assembly of two reducing complementing one another is a set of reducing, the be tightly connected hydraulic oil pipeline of hydraulic system of port connection, is characterized in that: reducing colloid is the carrier of ironware, parallels, motion bar, connecting rod, ironware, parallels, motion bar, connecting rod are incorporated into respectively among reducing colloid, anterior reducing glue core is by the disposable sulfuration and become an entirety in mould of multiple ironwares, four parallels, two motion bars and two connecting rods and rubber, ironware is the structure of special-shaped cam, ironware is made up of two special-shaped cams and connector, the end of ironware is special-shaped cam, special-shaped cam comprises head, middle part and afterbody, special-shaped cam is the structure of narrow " V " shape leaf lobe shape of head, connector two connects respectively special-shaped cam, anterior reducing glue core has multiple ironwares, multiple ironwares are incorporated into respectively among reducing colloid, thereby multiple ironwares form the assembly of the frame structure of semi-ring form, assembly belongs to a part for anterior reducing glue core agent structure, two special-shaped cams of same ironware lay respectively at the skin of the both sides of anterior reducing glue core agent structure, its ironware is longitudinally erected in reducing colloid inside, the head of the special-shaped cam of ironware is positioned at inner side, the afterbody of the special-shaped cam of ironware is positioned at outside, parallels is rectangle structure, there is through hole the centre of parallels, motion bar is columniform bar, it comprises mobile jib and bar head, bar head has two, connecting rod is interconnected to constitute by main body bar and major part, there is through hole the outer end of the main body bar of its connecting rod, on major part, there are an outer side plane and breach, its motion bar is longitudinally erected in the inside of the head of anterior reducing glue core, and be erected in the outside of assembly, the bar head of motion bar one end puts in the through hole of a parallels, the bar head of the motion bar other end puts in the through hole of another parallels, between its motion bar and parallels, be connected, connecting rod links the mobile jib of motion bar by the breach on its major part,The outer end of the main body bar of connecting rod is stretched out reducing colloid backward, stretches out the rear glue plane of the head of anterior reducing glue core, thereby, its motion bar and form a grip assembly with its motion bar direct-connected two parallels, connecting rods; One head of its anterior reducing glue core comprises a grip assembly, and another head of its anterior reducing glue core comprises another set of assembly; Parallels protrudes the agent structure of anterior reducing glue core, be positioned at the outside of the affiliated plane of the lateral surface of special-shaped cam, interlaced between the special-shaped cam of parallels and the ironware in the head of anterior reducing glue core, partially overlap, thereby, its parallels is positioned at the skin of the head of anterior reducing glue core, and the head that connects the agent structure of anterior reducing glue core, parallels belongs to a part for external ear.

2. the hydraulic flashboard blowout preventer of reducing sealing according to claim 1, is characterized in that: special-shaped cam has lateral surface and medial surface, and lateral surface and the medial surface of special-shaped cam are parallel to each other, the outer wall of the head of special-shaped cam is arc-shaped surface, the outer wall of the head of its special-shaped cam respectively with lateral surface and the crossing connection of medial surface of special-shaped cam, the middle part of special-shaped cam have two respectively with lateral surface and the medial surface wall plane being connected that intersects vertically, two wall plane apportion both sides, two wall planes respectively with the crossing connection in two ends of the outer wall of head, in two wall planes, the short wall plane of its length is referred to as shortwall plane, the wall plane that its length is long is referred to as longwell plane, the afterbody of special-shaped cam is convex-concave curved configuration, the afterbody of special-shaped cam comprises the outside wall surface of " s " shape, the outside wall surface of arc curve and tail wall plane, the outside wall surface of " s " shape, the outside wall surface of arc curve and tail wall plane are respectively with the lateral surface of special-shaped cam with medial surface is crossing is connected, one end of the outside wall surface of " s " shape connects longwell plane, the other end of the outside wall surface of " s " shape connects tail wall plane, one end of the outside wall surface of arc connects shortwall plane, the other end of the outside wall surface of arc connects tail wall plane, like this, tail wall interplanar is in the outside wall surface of " s " shape, between the outside wall surface of arc, and respectively with the outside wall surface of " s " shape, the outside wall surface of arc curve intersects and connects, the inner side of the affiliated plane that is positioned at longwell plane of the outside wall surface of " s " shape, the protrusion of the outside wall surface of arc curve and be positioned at the outside of the affiliated plane of shortwall plane, like this, the interior angle of the affiliated plane of tail wall plane and the affiliated Plane intersects of shortwall plane is obtuse angle, and the interior angle of the affiliated plane of tail wall plane and the affiliated Plane intersects of longwell plane is acute angle, connector is flat bar structure, and connector has two lateral surfaces and two arc surfaces, and two lateral surfaces of connector are parallel to each other, lateral surface between two arc surfaces, arc surface respectively with two crossing connections of lateral surface, the medial surface of special-shaped cam intersects vertically and is connected with connector, the center line of its connector is parallel and vertical with medial surface with the lateral surface of special-shaped cam with two lateral surfaces of connector respectively, and two special-shaped cams are positioned at respectively two outsides of connector symmetrically, an arc surface of connector and the head of special-shaped cam are in the same side, and another arc surface of connector and the afterbody of special-shaped cam are in the same side.

3. the hydraulic flashboard blowout preventer of reducing sealing according to claim 1, it is characterized in that: multiple ironwares space, evenly forward, ordered arrangement, the center line of the connector of its each ironware is parallel to each other and respectively on same circular arc, spacing distance between the center line of the connector of each ironware is identical, the lateral surface of the special-shaped cam that is positioned at the same side of its each ironware at grade, the medial surface of the special-shaped cam that is positioned at the same side of each ironware at grade, the head of ironware does not point to the arc core line of the circular arc at the center line place of the connector of each ironware, its arc core line refers to through the arc core of the circular arc at the center line place of the connector of its each ironware the center line parallel with the center line of the connector of each ironware respectively, ironware is tiltedly to its arc core line, the head of the special-shaped cam of ironware refers to a side of arc core line partially, interval between the head of the special-shaped cam of its multiple ironwares is identical, and same, the interval between the afterbody of the special-shaped cam of its multiple ironwares is identical.

4. the hydraulic flashboard blowout preventer of reducing sealing according to claim 1, it is characterized in that: the through hole in the middle of its parallels has two relative inwall side planes that are parallel to each other and two relative arc inner wall faces the inwall side plane that the be parallel to each other crossing connection relative with two respectively of arc inner wall face; The mobile jib two ends of motion bar are connecting-rod cap respectively, and mobile jib and bar head are respectively cylindrical shape, and the diameter of mobile jib is greater than the diameter of bar head, and the center line of mobile jib and bar head and motion bar is on same straight line; The main body bar of connecting rod is cylindrical shape, the through hole of the outer end of the main body bar of its connecting rod has two relative inwall side planes that are parallel to each other and two relative arc inner wall faces, the inwall side plane that the be parallel to each other crossing connection relative with two respectively of arc inner wall face; The outer side plane of its connecting rod is parallel with the inwall side plane of the through hole of main body bar, and the breach of its connecting rod is the opening of the shape of arc side face, and the arc core line of the arc side face of its breach is with outside plane parallel, and its arc core line is vertical with main body bar center line.

5. the hydraulic flashboard blowout preventer of reducing sealing according to claim 1, it is characterized in that: the center line of the center line of motion bar and the connector of ironware is parallel to each other, the center line of motion bar is vertical with the lateral surface of two parallels respectively, motion bar and connecting rod interconnect, make the center line of main body bar and the center line of motion bar of connecting rod vertical, and the center line of the main body bar of connecting rod divide the lateral surface that is clipped to two parallels vertical distance equate, its be positioned at the same side of anterior reducing glue core two parallels lateral surface at grade; The center line of the main body bar of two connecting rod is parallel to each other, and the center line of the main body bar of two connecting rods divides the vertical distance of the longitudinal middle tangent plane that is clipped to anterior reducing glue core to equate.

6. the hydraulic flashboard blowout preventer of reducing sealing according to claim 1, it is characterized in that: its inner ring is sandwiched between the affiliated plane of medial surface of two special-shaped cams of same ironware, the longitudinal middle tangent plane of the longitudinally middle tangent plane of inner ring and anterior reducing glue core is same plane, the inner ring of the agent structure of anterior reducing glue core adopts the structure of semicircular inwall side face or adopts the inwardly structure of the semi-ring body of each special-shaped cam of outstanding assembly of semicircular inwall side face, two heads of anterior reducing glue core, one is the head that has two interfaces, one for there being the head of two guide grooves, at the head that has two interfaces of anterior reducing glue core, two special-shaped cams of the ironware of one end of its assembly stretch out respectively corresponding front glue plane, the part at the part for head that the part of stretching out front glue plane of its special-shaped cam is its special-shaped cam or the part at the head of special-shaped cam and middle part or the head of special-shaped cam whole and the middle part that is inconjunction with thereof, the part of stretching out front glue plane of its special-shaped cam is referred to as stretched head, stretched head is two, and the interface of the head of its anterior reducing glue core is in front glue plane, at the head that has two guide grooves of anterior reducing glue core, two special-shaped cams of the ironware of the other end of its assembly stretch out respectively corresponding its front glue plane, the part for afterbody that the part of stretching out front glue plane of its special-shaped cam is its special-shaped cam or the part at the afterbody of special-shaped cam and middle part, two special-shaped cams of the ironware of this end of its assembly respectively and between inner ring and front glue plane, produce the breach of two dihedrals, its breach is guide groove, the part of stretching out front glue plane of the special-shaped cam of this end of its assembly is referred to as to stretch out tail, and stretching out tail is two, in the time that the inner ring of the agent structure of anterior reducing glue core adopts the structure of semicircular inwall side face, its inner ring is the each special-shaped cam of outstanding assembly inwardly, when the inner ring of the agent structure of anterior reducing glue core adopts semicircular inwall side face inwardly when the structure of the semi-ring body of each special-shaped cam of outstanding assembly, its semi-ring body is the each special-shaped cam of outstanding assembly inwardly, its semi-ring body is sandwiched between the affiliated plane of medial surface of two special-shaped cams of same ironware, the longitudinal middle tangent plane of the longitudinally middle tangent plane of semi-ring body and anterior reducing glue core is same plane, the part at the head of a part for the head of two special-shaped cams of each ironware of assembly or the head of two special-shaped cams and the part at middle part or two special-shaped cams whole and the middle part that is inconjunction with thereof is inwardly tiltedly stretched out respectively the inwall side face of inner ring.

7. the hydraulic flashboard blowout preventer of reducing sealing according to claim 1, it is characterized in that: the both sides of inner face in the middle of two side inner faces of opening sheet lay respectively at, two side inner faces at grade, middle inner face is parallel with side inner face, middle inner face is mutually vertical with the arc core line of the internal perisporium face of opening, middle inner face protrudes from side inner face, thereby connects by side between its middle inner face and side inner face, and its side is connected with middle inner face is vertical with side inner face respectively; Make to form a breach between the side inner face of groove bottom, inner plane and top opening sheet of side seal groove.

8. the hydraulic flashboard blowout preventer of reducing sealing according to claim 1, it is characterized in that: in the time that the flashboard assembly of two reducings docks mutually, in its a set of anterior reducing glue core, the lateral surface of the special-shaped cam that is positioned at the same side of each ironware of two anterior reducing glue cores at grade; Simultaneously, in two anterior reducing glue cores of a set of anterior reducing glue core, the head that has two interfaces on two anterior reducing glue cores cooperatively interacts and docks with the head that has two guide grooves respectively, its respectively stretched head and the guide groove on two anterior reducing glue cores, stretch out tail and interface cooperatively interacts, make stretched head inject mutually corresponding guide groove, stretch out tail and inject mutually corresponding interface.

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