CN217681661U - Gate valve type blowout preventer - Google Patents
Gate valve type blowout preventer Download PDFInfo
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- CN217681661U CN217681661U CN202221512765.XU CN202221512765U CN217681661U CN 217681661 U CN217681661 U CN 217681661U CN 202221512765 U CN202221512765 U CN 202221512765U CN 217681661 U CN217681661 U CN 217681661U
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Abstract
The utility model discloses a gate valve type blowout preventer, which comprises a set of gate valve type full-seal assembly and two sets of gate valve type half-seal assemblies which are arranged in a device shell from bottom to top; an axial channel, an upper chamber and a lower chamber which are respectively communicated with the axial channel are arranged at the center of the device shell, and the axial directions of the upper chamber, the lower chamber and the axial channel are respectively vertical to each other; the gate valve type full-sealing assembly controls the eccentric through hole on the valve plate to be communicated with the axial channel or staggered to seal the wellhead; the two sets of gate valve type semi-seal assemblies are symmetrically arranged in the upper chamber and move synchronously in opposite directions or reversely to hold the tubular column in the well to form a seal or open an annular space between the tubular column and the shaft; the gate valve type blowout preventer has the functions of sealing different pipe columns and fully sealing a wellhead, is high in functional integration degree, light in overall weight, capable of meeting different operation requirements with part of components in structural design in a replacement mode, and effectively reduces operation cost.
Description
Technical Field
The utility model relates to a preventer technical field, in particular to gate valve formula blowout preventer.
Background
When a production well operates, a sucker rod blowout preventer is additionally arranged so as to meet the operation requirement and the safety protection requirement; from the installation angle of the blowout preventer, when the oil pumping operation is carried out on an operation wellhead, the wellhead blowout preventer is arranged to seal sucker rods with different diameters; meanwhile, a valve capable of sealing the well head in a full-closed mode is required to be installed so as to avoid the risks of well kick, blowout and the like in the oil pumping operation process; after oil pumping is completed, the production well is changed into a water injection well, the well mouth needs to be sealed for a long time, the well mouth blowout preventer used in oil pumping operation cannot meet the use requirement of long-term sealing, a corresponding gate valve needs to be installed again, and the operation amount and the operation cost are high.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a have concurrently that tubular column seals and well head and seal the function entirely and seal structure more reliably more has permanent floodgate valve formula blowout preventer
Therefore, the utility model discloses technical scheme as follows:
a gate valve type blowout preventer comprises a set of gate valve type full seal assembly and two sets of gate valve type half seal assemblies which are arranged in a device shell from bottom to top; wherein the content of the first and second substances,
the center of the device shell is provided with an axial channel, the upper part of the device shell is provided with an upper cavity used for arranging two sets of gate valve type semi-seal assemblies, the lower part of the device shell is provided with a lower cavity used for arranging a gate valve type full-seal assembly, the upper cavity and the lower cavity are respectively communicated with the axial channel, and the axial directions of the upper cavity, the lower cavity and the axial channel are respectively arranged in a mutually vertical way;
the gate valve type full-sealing assembly comprises a lower valve cover, a valve seat, a wave spring group, a valve plate, an upper valve cover, a valve rod, a sealing gasket group, a hand wheel, a packing gland, a bearing group, a support, a valve cover nut and an upper valve cover; the inner walls of the upper side and the lower side of the lower cavity adjacent to the axial channel are respectively provided with an annular step; the valve seat consists of an upper valve seat and a lower valve seat which have the same structure, the wave spring group consists of two wave springs, and the upper valve seat and the lower valve seat are respectively propped against the end surfaces of the two annular steps through the wave springs; the valve plate is horizontally arranged in the lower cavity, and the top surface and the bottom surface of the valve plate respectively form surface sealing with the upper valve seat and the lower valve seat; the valve plate is provided with an eccentric through hole which can be communicated with the axial channel; the lower valve cover is provided with a blind hole, the upper valve cover is provided with a through hole, and the upper valve cover and the lower valve cover are fixed on two sides of the device shell in a way that the inner hole of the upper valve cover and the lower chamber are coaxially arranged and communicated; the valve rod is partially inserted into the through hole of the upper valve cover, and the end part of the valve rod is fixed on the end surface of the valve plate, which is far away from one end of the eccentric through hole, in the middle; the packing gland and the bonnet nut are sleeved on the outer wall of the valve rod in sequence; the packing gland is fixed on a sleeve formed by extending from the through hole of the upper valve cover along the axial direction, and the sealing element group is arranged in an annular space formed among the packing gland, the sleeve and the valve rod; the valve cap nut is in threaded connection with a threaded section arranged on the outer wall of the valve rod, and a bearing group is sleeved and fixed on the outer side of the valve cap nut; the bracket is sleeved outside the bonnet nut and fixed on the sleeve, so that the bearing set is limited and fixed in an annular space formed by the bracket, the packing gland and the bonnet nut; the hand wheel is sleeved and fixed on the outer wall of the bonnet nut through the upper bonnet;
the two sets of gate valve type semi-seal assemblies are symmetrically arranged in the upper chamber, and the two sets of gate valve type semi-seal assemblies embrace the tubular column in the well to form sealing through synchronous opposite movement or synchronously move reversely to open the channel in the well.
Furthermore, the gate valve type semi-seal assembly comprises a gate plate assembly, a side door, a shield, a gate plate shaft, a back cap, a locking shaft and a second bearing group; the gate plate assembly consists of a gate plate body, a gate plate top sealing element and a gate plate front sealing element; the gate plate body is a semi-circular plate body, is horizontally arranged on one side of the upper cavity in a mode that the inner annular surface faces the axial channel and can reciprocate along the axial direction of the upper cavity, so that the gate plate bodies of the two sets of gate valve type semi-seal assemblies can be combined into an annular plate body encircling the outer side of the tubular column in the well through relative motion; the flashboard top sealing piece is arranged on the top surface of the flashboard body, and the flashboard front sealing piece is arranged on the inner annular surface of the flashboard body; one end of the flashboard shaft is fixed on the outer annular surface of the flashboard body in the middle, the other end of the flashboard shaft is provided with an axial blind hole, and the hole wall is provided with a T-shaped thread; the locking shaft consists of a screw and a polished rod, the screw is in threaded connection with the blind hole of the flashboard shaft, a second bearing group is arranged outside the polished rod, and the end part of the polished rod is processed into an outer hexagonal end; the side door and the shield are sequentially sleeved on the outer side of the flashboard shaft and are fixedly connected with the device shell into a whole; the back cap is sleeved and fixed on the outer side of the protective cover, the inner walls of the back cap and the protective cover are respectively provided with an inner annular step, the second bearing group is limited and fixed in an annular groove formed between the two inner annular steps, and the locking shaft is rotatably arranged on the inner side of the protective cover.
Furthermore, two annular sealing ring grooves with built-in O-shaped sealing rings are respectively arranged on the outer walls of the upper valve seat and the lower valve seat at intervals, so that the outer wall of the upper valve seat and the wall surface below the upper annular step form sealing, and the outer wall of the lower valve seat and the wall surface above the lower annular step form sealing.
Furthermore, an annular sealing groove with a built-in middle hole backing ring is formed in the inner wall of the joint of the lower valve cover and the device shell; an annular sealing groove with a built-in middle hole backing ring is arranged on the inner wall of the joint of the upper valve cover and the device shell.
Furthermore, the sealing gasket group is composed of a lower gasket, a lip-shaped gasket and an upper gasket which are sequentially sleeved on the outer side of the valve rod from inside to outside.
Furthermore, a grease injection channel communicated with the through hole is radially formed in the cover body of the upper valve cover, and a grease injection valve is arranged at a channel opening on one side of the outer wall of the upper valve cover.
Furthermore, an oil filling channel communicated to the bearing group is radially arranged on the side wall of the support, and an oil cup is arranged at the outer side port of the oil filling channel.
Furthermore, the aperture of the axial through hole of the side door is matched with the outer diameter of the shaft body of the flashboard shaft, and two annular sealing ring grooves with second O-shaped sealing rings and one annular sealing ring groove with a lip-shaped sealing ring are arranged on the inner wall of the axial through hole at intervals, so that radial sealing is formed between the outer wall of the shaft body of the flashboard shaft and the wall of the axial through hole of the side door; an annular sealing ring groove with a third O-shaped sealing ring is arranged on the end face of the side door in contact with the device shell, so that end face sealing is formed between the device shell and the side door.
Furthermore, two lifting ring screws are symmetrically arranged on the top surface of the device shell.
Compared with the prior art, the gate valve type blowout preventer comprises a set of gate valve type full-seal assembly and two sets of gate valve type half-seal assemblies which are arranged in a device shell, has the functions of sealing different pipe columns and full-seal well mouths, is high in function integration degree, light in integral weight and reasonable in structural design, and can meet different operation requirements by replacing the specifications of part of components according to operation practice; meanwhile, in the design of the sealing structure, the sealing rings are arranged at the structural connection positions of a plurality of keys, the sealing effect of the device is guaranteed, a more reliable metal sealing mode is designed in the structure for realizing wellhead full sealing, and the operation cost is effectively reduced.
Drawings
Fig. 1 is a schematic structural view of a gate valve type blowout preventer according to the present invention;
fig. 2 is a partial cross-sectional view of a gate valve type full seal assembly of the gate valve type blowout preventer of the present invention;
FIG. 3 is a partial cross-sectional view of a gate valve type semi-seal assembly of the gate valve type blow out preventer of the present invention;
fig. 4 isbase:Sub>A sectional viewbase:Sub>A-base:Sub>A of fig. 1.
Detailed Description
The present invention will be further described with reference to the following drawings and specific examples, but the following examples are by no means limiting the present invention.
As shown in fig. 1, the gate valve type blowout preventer comprises a set of gate valve type full seal assembly B and two sets of gate valve type half seal assemblies C which are arranged in a device shell a from bottom to top; wherein, the first and the second end of the pipe are connected with each other,
an axial channel is arranged at the center of the device shell A, the inner diameter of the axial channel is matched with the inner diameter of the wellhead, so that when the axial channel is fixed at the wellhead, the axial channel is communicated with the shaft in a mode that the axial direction of the axial channel is overlapped with the axial direction of the shaft; meanwhile, an upper cavity for arranging two sets of gate valve type half-seal assemblies C is arranged at the upper part of the device shell A, a lower cavity for arranging a gate valve type full-seal assembly B is arranged at the lower part of the device shell A, the upper cavity and the lower cavity are respectively communicated with the axial channel, and the axial directions of the upper cavity, the lower cavity and the axial channel are respectively and vertically arranged;
as a preferred technical solution of this embodiment, two lifting eye screws 26 are symmetrically arranged on the top surface of the device housing a, so as to facilitate the installation of the device above the wellhead;
as shown in fig. 2, the lower chamber of the device housing a is a cubic chamber, and both ends of the cubic chamber are communicated with the outside; an upper annular step and a lower annular step are respectively arranged on the upper side and the lower side of the inner wall of the cavity adjacent to the axial channel; the gate valve type full-sealing assembly B comprises a lower valve cover 3, a valve seat 5, a wave spring group 7, a valve plate 8, an upper valve cover 9, a valve rod 11, a lower packing pad 12, lip packing 13, an upper packing pad 14, a hand wheel 15, a packing gland 18, a bearing group 20, a support 21, a valve cover nut 22 and an upper valve cover 23; wherein the content of the first and second substances,
the valve seat 5 is composed of an upper valve seat and a lower valve seat with the same structure; the upper valve seat (lower valve seat) is a cylindrical barrel with the inner diameter same as that of the axial channel, and an annular spring setting groove is formed in the end face of one end of the barrel; the upper valve seat is arranged on the end surface of the upper annular step in a mode that the annular spring arrangement groove faces upwards, and the lower valve seat is arranged on the end surface of the lower annular step in a mode that the annular spring arrangement groove faces downwards; the wave spring group 7 is composed of two wave springs which are respectively arranged in the annular spring arrangement grooves of the upper valve seat and the lower valve seat, one end of each wave spring is propped against the bottom of the annular spring arrangement groove, and the other end of each wave spring is propped against the end surface of the annular step; in order to ensure that the sealing performance of the structure is good, two annular sealing ring grooves with O-shaped sealing rings 6 arranged inside are respectively arranged on the outer walls of the upper valve seat and the lower valve seat at intervals, so that the outer wall of the upper valve seat and the wall surface below the upper annular step form sealing, and the outer wall of the lower valve seat and the wall surface above the lower annular step form sealing;
the valve plate 8 is a cuboid body with the size matched with the size and shape of the lower cavity of the device shell A, and is horizontally arranged in the lower cavity, an axial through hole with the same inner diameter as the axial channel is arranged on the valve plate 8 and close to one end side, so that the valve plate 8 is controlled to reciprocate in the lower cavity to realize the opening and closing of the axial channel; meanwhile, under the action of the two wave springs, the bottom surface of the upper valve seat tightly abuts against the upper surface of the valve plate 8 to form surface sealing, and the top surface of the lower valve seat tightly abuts against the lower surface of the valve plate 8 to form metal surface sealing;
the lower valve cover 3 is a cover body with a blind hole in the center, the cover body is arranged at an opening at one end of the lower cavity in a mode that the blind hole and the lower cavity are coaxially arranged, and the lower valve cover 3 is connected and fixed with the device shell A into a whole through 8 bolts 2 uniformly distributed along the circumferential direction and 8 nuts 1 matched with the bolts 2; in order to ensure that the sealing performance of the joint between the lower valve cover 3 and the device shell A is good, an annular sealing groove with a built-in middle hole gasket ring 4 is formed in the inner wall of the joint between the lower valve cover 3 and the device shell A;
the upper valve cover 9 is a cover body with a through hole at the center, the cover body is arranged at the opening at the other end of the lower cavity in a mode that the through hole and the lower cavity are coaxially arranged, and the upper valve cover 9 is connected and fixed with the device shell A into a whole through 8 bolts 17 uniformly distributed along the circumferential direction of the upper valve cover and 8 nuts matched with the bolts 17; in order to ensure that the sealing performance of the joint between the upper valve cover 9 and the device shell A is good, an annular sealing groove with a built-in middle hole gasket ring 4 is formed in the inner wall of the joint between the upper valve cover 9 and the device shell A;
as a preferred technical solution of this embodiment, a grease injection channel communicated with the through hole is radially formed on the cover body of the upper valve cover 9, and correspondingly, a grease injection valve 10 is disposed at a channel opening located on one side of the outer wall of the upper valve cover 9, so as to inject sealing grease into the through hole of the upper valve cover 9 through the grease injection channel;
the valve rod 11 is a cylindrical rod body, and a thread section matched with the T-shaped thread on the inner side of the bonnet nut 22 is arranged on the outer wall of the valve rod, so that the bonnet nut 22 is sleeved and in threaded connection with the screw section of the valve rod 11; the packing gland 18, the upper packing pad 14, the lip-shaped packing 13 and the lower packing pad 12 are sequentially sleeved on the valve rod 11 and positioned on one side of the screw rod section; wherein the content of the first and second substances,
the valve rod 11 is partially inserted into the through hole of the upper valve cover 9, and the end part of the inserted part is fixed on the end surface of the other end side of the valve plate 8 in the middle; correspondingly, a cylindrical sleeve is formed by extending outwards along the axial direction of the valve rod 11 from the circumferential position of the through hole of the upper valve cover 9 on the outer wall of the device shell, and an annular space is formed between the sleeve and the valve rod 11; the lower packing pad 12, the lip-shaped packing pad 13 and the upper packing pad 14 are sequentially sleeved on the valve rod 11 and are arranged on the inner side of an annular space between the sleeve and the valve rod 11; the inner wall of the end part of the sleeve is provided with a connecting internal thread, and the outer wall of the sleeve is provided with a connecting external thread;
the packing gland 18 is partially inserted into an annular space between the sleeve and the valve rod 11 and is fixedly connected with the sleeve into a whole through screw threads; in order to ensure the sealing performance between the valve rod 11 and the upper valve cover 9, the lower packing pad 12 is tightly pressed on the outer wall of the shell positioned at the periphery of the through hole of the upper valve cover 9, and the upper packing pad 14 is tightly pressed on the end part of the packing gland 18;
an outer annular boss is arranged on the outer wall of one end of the bonnet nut 22, and an annular step is formed by inwards sinking the outer wall of the other end of the bonnet nut; the bearing set 20 is composed of two rotating bearings, both of which are sleeved outside the bonnet nut 22 in an interference fit manner and respectively abut against the end faces of two sides of an outer annular boss on the bonnet nut 22;
the bracket 21 is a cylindrical barrel with an opening at one end and a closed end at the other end, and the inner diameter of the closed end of the barrel is smaller than that of the open end; the center of the closed end of the cylinder body is also provided with a through hole which is adaptive to the outer diameter of the bonnet nut 22, the inner diameter of the closed end of the cylinder body is adaptive to the outer diameter of an outer annular boss of the bonnet nut 22, the inner diameter of the open end of the cylinder body is adaptive to the outer diameter of the sleeve, a connecting internal thread is arranged on the inner wall of the open end of the cylinder body, the support 21 is sleeved on the outer side of the bonnet nut 22 and is connected and fixed with the sleeve in a threaded manner into a whole, and the two rotating bearings are limited and fixed in an annular space formed by the packing gland 18, the support 21 and the bonnet nut 22; in order to prevent the support 21 from tripping, the support 21 is also fixed on the side wall of the sleeve by a plurality of set screws 16 arranged along the circumferential direction;
as a preferred technical solution of this embodiment, an oil filling channel communicated to the bearing set 20 is radially formed on the side wall of the bracket 21, and an oil cup 19 is disposed at a port of the oil filling channel to replenish lubricating oil to the bearing set 20 through the oil filling channel; the oil cup 19 is fixed on the bracket 21;
the hand wheel 15 and the upper valve cover 23 are sequentially sleeved on the outer wall of the other end of the valve cover nut 22 through central holes of the hand wheel 15 and the upper valve cover 23, one end of the hand wheel 15 abuts against the annular step end face of the valve cover nut 22, the other end of the hand wheel is connected with the upper valve cover 23, and the upper valve cover 23 is sleeved on and in threaded connection with an end arm of the valve cover nut 22; the other side of the valve stem 11 is arranged in the inner cavity of the upper valve housing 23 with an annular gap.
As shown in fig. 3, the upper chamber of the device housing a is also a cubic chamber, and both ends of the cubic chamber are communicated with the outside; two sets of gate valve type semi-seal assemblies C are symmetrically arranged on a device shell A positioned on the end sides of two openings of the cubic cavity; specifically, the gate valve type half-sealing assembly C comprises a gate assembly 27, a side door 28, a shield 29, a gate shaft 30, a back cap 32, a locking shaft 33 and a second bearing group 37;
the gate plate assembly 27 is composed of a gate plate body, a gate plate top sealing piece and a gate plate front sealing piece; the flashboard body is a semi-circular board body, is horizontally arranged on one side of the upper cavity in a mode that the inner annular surface faces the axial channel and can reciprocate along the axial direction of the upper cavity, and the inner ring radius of the flashboard body is matched with the outer diameter of the downhole tubular column, so that the flashboard bodies of the two sets of the flashboard valve type semi-seal assemblies C can be combined into an annular board body encircling the outer side of the downhole tubular column through relative motion; a flashboard shaft insertion groove is radially formed in the lower side of the middle of the outer annular surface of the flashboard body; a first arc-shaped through groove with a built-in brake plate top sealing element is formed in the top surface of the brake plate body, so that the brake plate body and the upper side inner wall of the upper cavity form sealing; a second arc-shaped through groove internally provided with a front sealing element of the gate plate is formed in the inner annular surface of the gate plate body, so that the gate plate body can form sealing with the outer wall of the well-descending tubular column;
the damper shaft 30 is composed of a shaft body and a connecting body; the shaft body is a cylindrical barrel with an opening at one end and a closed end, and T-shaped threads are arranged on the inner wall of the barrel; the connecting body is fixed on the end face of the closed end of the shaft body, and the shape and the size of the connecting body are matched with those of the flashboard shaft insertion groove, so that the connecting body is inserted and fixed in the flashboard shaft insertion groove;
the locking shaft 33 is formed by integrally molding a screw rod and a polish rod; the screw rod is inserted and connected with the inner side of the shaft body of the flashboard shaft 30 in a threaded manner; a second outer annular boss is arranged on the outer wall of the polished rod, and the second bearing group 37 consists of two rotating bearings which are sleeved and fixed on the outer side of the polished rod in an interference fit manner and respectively abut against two end faces of the second outer annular boss; the rod end of the polished rod is processed into an outer hexagonal end which can be matched with a socket wrench for use;
the side door 28 is a cylindrical barrel with an axial through hole in the center, is arranged on the device shell A in a manner that the axial through hole and the upper chamber are coaxially arranged, and is fixed on the device shell A through a plurality of side door bolts which are not arranged along the circumferential direction; the aperture of the axial through hole of the side door 28 is matched with the outer diameter of the shaft body of the flashboard shaft 30, and two annular sealing ring grooves with second O-shaped sealing rings 36 and one annular sealing ring groove with a lip-shaped sealing ring 35 are arranged on the inner wall of the axial through hole at intervals, so that radial sealing is formed between the outer wall of the shaft body of the flashboard shaft 30 and the wall of the axial through hole of the side door 28; meanwhile, an annular sealing ring groove with a third O-shaped sealing ring 34 arranged inside is formed in the end face of the side door 28 in contact with the device shell A, so that sealing is formed between the device shell A and the side door 28;
the shield 29 is a cylindrical cylinder, which is sleeved on the outside of the brake plate shaft 30 in a manner of having an annular space; a third outer annular boss is provided on the outer wall of the shield 29, so that the shield 29 is fixed to the side door 28 by a plurality of socket head cap screws 1 circumferentially provided on the third outer annular boss; an inner annular boss is arranged on the inner wall of the protective cover 29;
the back cap 32 is a cylindrical barrel body which is sleeved outside the bottom end of the protective cover 29 and is fixedly connected with the protective cover 29 into a whole in a threaded manner; a second inner annular boss is arranged on the inner wall of the end part of the back cap 32, so that an annular groove for arranging a second bearing group 37 is formed among the protective cover 29, the inner annular boss of the protective cover 29 and the second inner annular boss of the back cap 32, and the two rotating bearings are respectively and simultaneously abutted against the end surface of the inner annular boss of the protective cover 29 and the end surface of the second inner annular boss of the back cap 32.
The working principle of the gate valve type blowout preventer is as follows:
as shown in fig. 2, when a tubular column is in the well, a socket wrench is used to synchronously and unidirectionally rotate the locking shafts in the two sets of gate valve type semi-seal assemblies C, so that the gate plate shafts are pushed to drive the gate plate assemblies to oppositely move towards the direction of the tubular column by using the principle that the locking shafts rotate to drive the gate plate shafts to move in the axial direction of the locking shafts until the two gate plate assemblies surround the outer side of the tubular column and form a seal with the outer wall of the tubular column, thereby realizing the purpose of sealing an annular space between the tubular column and the shaft; on the contrary, when the locking shafts in the two gate valve type semi-seal assemblies C are synchronously and reversely rotated by using the socket wrench, the two locking shafts rotate and drive the two gate plate shafts to respectively drive the two gate plate assemblies to move towards the direction far away from the pipe column, and at the moment, the annular space between the pipe column and the shaft is opened;
as shown in fig. 3, when there is no pipe column in the well, the hand wheel of the gate valve type full-sealing assembly B is rotated to drive the valve cap nut to rotate, and then the valve plate is synchronously pushed by using the principle that the valve cap nut rotates to drive the valve rod to move along the axial direction thereof until the axial through hole on the valve plate is changed from the state of being communicated with the axial channel to the state of being completely staggered and not communicated with the axial channel, and at this time, the axial channel closes the channel to realize the closing of the well mouth; on the contrary, when the valve cap nut is rotated reversely by the hand wheel, the valve cap nut rotates to drive the valve rod to do reverse linear motion along the axis direction until the axial through hole on the valve plate and the axial channel are restored to be communicated, at the moment, the axial channel is opened again, and the well mouth is opened again.
Although the invention has been described with respect to illustrative embodiments thereof for the purpose of facilitating a person skilled in the art to understand the invention, it is to be understood that the invention is not limited in scope to the embodiments, and that various changes will become apparent to those skilled in the art when such changes are made and still be within the spirit and scope of the invention as defined and defined in the appended claims.
Claims (9)
1. A gate valve type blowout preventer is characterized by comprising a set of gate valve type full seal assembly and two sets of gate valve type half seal assemblies which are arranged in a device shell from bottom to top; wherein the content of the first and second substances,
the center of the device shell is provided with an axial channel, the upper part of the device shell is provided with an upper cavity used for arranging two sets of gate valve type semi-seal assemblies, the lower part of the device shell is provided with a lower cavity used for arranging a gate valve type full-seal assembly, the upper cavity and the lower cavity are respectively communicated with the axial channel, and the axial directions of the upper cavity, the lower cavity and the axial channel are respectively arranged in a mutually vertical way;
the gate valve type full-sealing assembly comprises a lower valve cover (3), a valve seat (5), a wave spring group (7), a valve plate (8), an upper valve cover (9), a valve rod (11), a sealing gasket group, a hand wheel (15), a packing gland (18), a bearing group (20), a support (21), a valve cover nut (22) and an upper valve cover (23); the inner walls of the upper side and the lower side of the lower cavity adjacent to the axial channel are respectively provided with an annular step; the valve seat (5) is composed of an upper valve seat and a lower valve seat which have the same structure, the wave spring group (7) is composed of two wave springs, and the upper valve seat and the lower valve seat are respectively propped against the end surfaces of the two annular steps through the wave springs; the valve plate (8) is horizontally arranged in the lower cavity, and the top surface and the bottom surface of the valve plate form surface sealing with the upper valve seat and the lower valve seat respectively; the valve plate (8) is provided with an eccentric through hole which can be communicated with the axial channel; the lower valve cover (3) is provided with a blind hole, the upper valve cover (9) is provided with a through hole, and the blind hole and the through hole are fixed on two sides of the device shell in a way that the inner hole of the blind hole and the lower cavity are coaxially arranged and communicated; the valve rod (11) is partially inserted into a through hole of the upper valve cover (9), and the end part of the valve rod is fixed on the end surface of one end, far away from the eccentric through hole, of the valve plate (8) in the middle; the packing gland (18) and the valve cover nut (22) are sequentially sleeved on the outer wall of the valve rod (11); the packing gland (18) is fixed on a sleeve formed by extending from the through hole of the upper valve cover (9) along the axial direction of the through hole, and the sealing element group is arranged in an annular space formed among the packing gland (18), the sleeve and the valve rod (11); the bonnet nut (22) is in threaded connection with a threaded section arranged on the outer wall of the valve rod (11), and a bearing set (20) is sleeved and fixed on the outer side of the bonnet nut; the support (21) is sleeved on the outer side of the valve cap nut (22) and fixed on the sleeve, so that the bearing group (20) is limited and fixed in an annular space formed by the support (21), the packing gland (18) and the valve cap nut (22); the hand wheel (15) is sleeved and fixed on the outer wall of the valve cover nut (22) through an upper valve cover (23);
the two sets of gate valve type semi-seal assemblies are symmetrically arranged in the upper chamber, and the two sets of gate valve type semi-seal assemblies embrace the tubular column in the well to form sealing through synchronous opposite movement or synchronously move reversely to open the channel in the well.
2. The gate valve blowout preventer of claim 1, wherein the gate valve type half seal assembly comprises a gate assembly (27), a side door (28), a shroud (29), a gate shaft (30), a back cap (32), a lock shaft (33), and a second bearing set (37); the gate plate assembly (27) is composed of a gate plate body, a gate plate top sealing piece and a gate plate front sealing piece; the gate plate body is a semi-circular plate body, is horizontally arranged on one side of the upper cavity in a mode that the inner annular surface faces the axial channel and can reciprocate along the axial direction of the upper cavity, so that the gate plate bodies of the two sets of gate valve type semi-seal assemblies can be combined into an annular plate body encircling the outer side of the tubular column in the well through relative motion; the flashboard top sealing piece is arranged on the top surface of the flashboard body, and the flashboard front sealing piece is arranged on the inner annular surface of the flashboard body; one end of the flashboard shaft (30) is fixed on the outer annular surface of the flashboard body in the middle, the other end is provided with an axial blind hole, and the hole wall is provided with T-shaped threads; the locking shaft (33) is composed of a screw rod and a polished rod, the screw rod is in threaded connection with the blind hole of the brake plate shaft (30), a second bearing group (37) is arranged on the outer side of the polished rod, and the end part of the polished rod is processed into an outer hexagonal end; the side door (28) and the shield (29) are sequentially sleeved on the outer side of the flashboard shaft (30) and are fixedly connected with the device shell into a whole; the back cap (32) is sleeved and fixed on the outer side of the protective cover (29), the inner walls of the back cap and the protective cover are respectively provided with an inner annular step, the second bearing group (37) is limited and fixed in an annular groove formed between the two inner annular steps, and the locking shaft (33) is rotatably arranged on the inner side of the protective cover (29).
3. The gate valve type blowout preventer according to claim 1, wherein two annular seal ring grooves with O-ring seals (6) disposed therein are formed at intervals on the outer walls of the upper and lower valve seats, respectively, so that the outer wall of the upper valve seat forms a seal with the wall surface below the upper annular step, and the outer wall of the lower valve seat forms a seal with the wall surface above the lower annular step.
4. The gate valve type blowout preventer according to claim 1, wherein an annular seal groove with a central hole gasket ring (4) disposed therein is formed on an inner wall of a joint of the lower bonnet (3) and the device housing; an annular sealing groove with a built-in middle hole backing ring (4) is arranged on the inner wall of the joint of the upper valve cover (9) and the device shell.
5. The gate valve type blowout preventer according to claim 1, wherein the packing set is constituted by a lower packing (12), a lip packing (13) and an upper packing (14) which are sequentially fitted around the outside of the valve stem (11) from the inside to the outside.
6. The gate valve type blowout preventer according to claim 1, wherein a grease injection passage communicating with the through hole is radially provided on the cover body of the upper valve cover (9), and a grease injection valve (10) is provided at a passage port located on the outer wall side of the upper valve cover (9).
7. The gate valve type blowout preventer according to claim 1, wherein a filler channel is radially formed in the side wall of the bracket (21) and connected to the bearing assembly (20), and an oil cup (19) is provided at an outer port of the filler channel.
8. The gate valve type blowout preventer according to claim 2, wherein the diameter of the axial through hole of the side door (28) is adapted to the outer diameter of the body of the gate plate shaft (30), and two annular seal ring grooves with the second O-ring (36) and one annular seal ring groove with the lip-shaped seal ring (35) are formed on the inner wall of the axial through hole at intervals, so that a radial seal is formed between the outer wall of the body of the gate plate shaft (30) and the wall of the axial through hole of the side door (28); an annular sealing ring groove with a third O-shaped sealing ring (34) is arranged on the end face of the side door (28) which is in contact with the device shell, so that end face sealing is formed between the device shell and the side door (28).
9. The gate valve type blowout preventer of claim 1, wherein two eye screws (26) are symmetrically disposed on the top surface of the device housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221512765.XU CN217681661U (en) | 2022-06-16 | 2022-06-16 | Gate valve type blowout preventer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221512765.XU CN217681661U (en) | 2022-06-16 | 2022-06-16 | Gate valve type blowout preventer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217681661U true CN217681661U (en) | 2022-10-28 |
Family
ID=83710088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221512765.XU Active CN217681661U (en) | 2022-06-16 | 2022-06-16 | Gate valve type blowout preventer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217681661U (en) |
-
2022
- 2022-06-16 CN CN202221512765.XU patent/CN217681661U/en active Active
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