CN218494252U

CN218494252U - Two-way pressure balance type cock valve opening mechanism

Info

Publication number: CN218494252U
Application number: CN202222557725.3U
Authority: CN
Inventors: 顾国才; 李�浩; 李�荣; 颜冰; 孙云
Original assignee: Yancheng Dagang Petroleum Tools Factory Co ltd
Current assignee: Yancheng Dagang Petroleum Tools Factory Co ltd
Priority date: 2022-09-27
Filing date: 2022-09-27
Publication date: 2023-02-17
Anticipated expiration: 2032-09-27

Abstract

The utility model discloses a two-way pressure balance formula plug valve opening mechanism, including the inside valve body, interlocking piston I, sealed end cap, interlocking piston II, the pressure balance passageway of seting up horizontal channel, the sealed pad of rubber, housing screw, regulation lock nut, safe seal seat I, sealed spheroid, safe seal seat II, the sealed pad of embedding, extrusion spring, open knob, ring packing circle, constitute pressure balance mechanism, safe seal mechanism and little moment of torsion opening mechanism respectively by above-mentioned structure. The utility model has the advantages that: the mechanism is designed with a pressure balance mechanism, and the pressure balance between the space pressure of the ball body and the pressure in the valve body at one end with the pressure is ensured by means of automatic hydraulic interlocking, so that the ball body is in a free state and is easy to open.

Description

Two-way pressure balance type cock valve opening mechanism

Technical Field

The utility model relates to a drilling operation technical field especially relates to a two-way pressure balance formula cock valve opening mechanism.

Background

The anti-blowout tools in the well control are mainly designed to reduce the opening torque as far as possible under the condition that the safety of the equipment and personnel needs to be ensured, so that the problem that the mechanism is difficult to open due to different well mouths or special conditions of different pressures and certain difficulty is brought to well mouth operation is avoided; if the sealing ball body in the mechanism is forcedly opened, the sealing ball body is cracked and is not used, so that the operation time is delayed, the efficiency is reduced, and more importantly, great potential safety hazards exist. In order to solve the problem that a plug valve in the prior art cannot be safely opened under the condition of high pressure, the application designs a bidirectional pressure balance type plug valve opening mechanism, and aims at a specially designed mechanism which is large in safety opening difficulty and easy to cause accidents under the condition of high pressure and small in opening torque, safe and fast.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a bidirectional pressure balance type cock valve opening mechanism.

In order to solve the technical problem, the utility model discloses a technical scheme be:

a bidirectional pressure balance type plug valve opening mechanism comprises a valve body, an interlocking piston I, a sealing plug, an interlocking piston II, a pressure balance channel, a rubber sealing gasket, a compression screw, an adjusting locking nut, a safety sealing seat I, a sealing ball body, a safety sealing seat II, an embedding sealing gasket, an extruding spring, an opening knob and an annular sealing ring, wherein the valve body, the interlocking piston I, the sealing plug, the interlocking piston II, the safety sealing seat I, the sealing ball body, the safety sealing seat II, the embedding sealing gasket, the extruding spring, the opening knob and the annular sealing ring are internally provided with the horizontal channel, the pressure balance mechanism is respectively formed by the structures, the safety sealing mechanism and the small-torque opening mechanism are arranged, the pressure balance structure comprises the interlocking piston I, the sealing plug, the interlocking piston II, the pressure balance channel, the rubber sealing gasket and the compression screw, the pressure balance channel is arranged below the horizontal channel of the valve body, the two sides of the pressure balance channel are respectively and are hermetically connected with the interlocking piston I and the interlocking piston II, one side of the pressure balance channel penetrates through the inner wall of the valve body and is communicated with the outside, the connection part of the pressure balance channel and the outside is connected with a sealing plug in a sealing way, the sealing plug is fixedly connected with the valve body through a compression screw, the safety sealing mechanism comprises an adjusting locking nut, a safety sealing seat I, a sealing ball body, a safety sealing seat II, an embedded sealing gasket and an extrusion spring, the adjusting locking nut fixes the safety sealing seat I and the sealing ball body mutually, the safety sealing seat II is fixedly arranged at one side of the sealing ball body, which is far away from the safety sealing seat I, the extrusion spring connects the safety sealing seat II with the valve body, the connection parts of the safety sealing seat I and the safety sealing seat II with the sealing ball body are provided with a plurality of embedded sealing gaskets, the small-torque opening mechanism comprises an opening knob and an annular sealing ring, the opening knob is arranged at the top of the sealing ball body, and the valve body is positioned above the sealing ball body and is provided with a connecting groove, the connecting groove is provided with an opening knob in a sealing mode, the opening knob is fixedly connected with an annular sealing ring with the inner wall of the connecting groove, and a starting groove is formed in the opening knob.

In order to better solve the technical problem, the utility model discloses a further technical scheme is: the sealing ball body is made of stainless steel materials, the valve body is made of hard alloy materials, and sealing layers made of polytetrafluoroethylene materials are added to sealing surfaces of the safety sealing seat I and the safety sealing seat II.

In order to better solve the technical problem, the utility model discloses a further technical scheme is: the notch part of the starting groove is matched with the working face of the knob wrench, a plurality of annular sealing rings are embedded in the outer side walls of the first safety sealing seat and the second safety sealing seat and are multiple, the annular sealing rings jointly seal a horizontal channel, and the two ends of the valve body are connected to an oil pipe respectively through oil pipe sleeve buckling types.

The utility model has the advantages that: the hydraulic pressure balance mechanism has the advantages of pressure balance function, selectable two-way operation function, small torque, quick opening function, high-efficiency and safe sealing function, small size, reasonability and compactness, safety and environmental protection, labor intensity reduction and great improvement on working efficiency. The pressure balance function: the mechanism is designed with a pressure balance mechanism, and the pressure balance between the space pressure of the ball body and the pressure in the valve body at one end with the pressure is ensured by means of automatic hydraulic interlocking, so that the ball body is in a free state and is easy to open. Optional bidirectional job function: the mechanism has the advantages that the restriction of the original single-ended use is overcome, the mechanism has a bidirectional use function, any one end of the mechanism is connected and has a pressure balance function, and the mechanism can be selectively connected according to the requirements of the on-site buckle type connection condition during operation. The operation is convenient and fast. The function is opened to the swift that the moment of torsion is little: the opening mechanism is designed under the condition of pressure balance, namely the pressure in a sealing cavity formed by the outside of the sealing ball body and the valve body is balanced with the pressure at any end entering the valve body. The ball body is easily opened under the sealed condition, the opening torque is reduced, the safety factor of the mechanism is improved, and the service life is prolonged. High-efficient safe sealed function: the ball body in the mechanism is made of stainless steel materials, so that the mechanism has the advantages of pressure bearing and corrosion resistance; the valve seat surface is made of hard alloy, so that the valve seat has the advantages of uniform bearing force, deformation prevention and pressure stabilization, and the sealing surface is added with polytetrafluoroethylene, so that the valve seat has the advantages of high elasticity, stable sealing, safety and reliability.

Drawings

Fig. 1 is an overall view of a mechanism of a bidirectional pressure balance type plug valve opening mechanism provided by the present invention;

fig. 2 is a schematic structural view of the two-way pressure balance type plug valve opening mechanism according to the present invention showing the structure that the lower interlocking piston i is opened in a pressure balance sealing state;

fig. 3 is a schematic structural view of the closing of the lower interlocking piston ii in a pressure balance sealing state in the two-way pressure balance type cock valve opening mechanism provided by the present invention;

fig. 4 is a schematic structural diagram of a two-way pressure balance type cock valve opening mechanism according to the present invention, in which an interlocking piston i is closed in a pressure hydraulic interlocking state;

fig. 5 the utility model provides a structural schematic diagram that interlock piston II opened under the pressure hydraulic pressure interlocking state in two-way pressure balance formula cock valve opening mechanism.

In the figure: 1 interlocking piston I, 2 sealed end caps, 3 interlocking piston II, 4 pressure balance passageways, 5 rubber seal pads, 6 compression screws, 7 adjusting locking nuts, 8 safe seal seats I, 9 sealed spheres, 10 safe seal seats II, 11 embedded seal pads, 12 extrusion springs, 13 opening knobs and 14 annular seal rings.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

As shown in fig. 1-5, a bidirectional pressure balance type plug valve opening mechanism comprises a valve body with a horizontal channel inside, an interlocking piston i 1, a sealing plug 2, an interlocking piston ii 3, a pressure balance channel 4, a rubber sealing gasket 5, a compression screw 6, an adjusting locking nut 7, a safety sealing seat i 8, a sealing ball 9, a safety sealing seat ii 10, an embedded sealing gasket 11, an extrusion spring 12, an opening knob 13 and an annular sealing ring 14, wherein the pressure balance mechanism, the safety sealing mechanism and the small torque opening mechanism are respectively formed by the above structures. Pressure balance structure includes interlocking piston I1, sealed end cap 2, interlocking piston II 3, pressure balance passageway 4,

rubber packing pad

5 and 6 housing screw, pressure balance passageway 4 sets up in the below of valve body horizontal channel, pressure balance passageway 4's both sides respectively sealing connection have interlocking piston I1 and interlocking piston II 3, the inner wall of valve body is run through and communicates with the external world in one side of pressure balance passageway 4, pressure balance passageway 4 and external junction sealing connection have sealed end cap 2, sealed end cap 2 is through housing screw 6 and valve body fixed connection. Safety seal mechanism is including adjusting lock nut 7, safety seal seat I8, sealed spheroid 9, safety seal seat II 10, the sealed pad 11 of embedding and extrusion spring 12, it is fixed each other safety seal seat I8 and sealed spheroid 9 to adjust lock nut 7, safety seal seat II 10 is fixed to be set up in one side that safety seal seat I8 was kept away from to sealed spheroid 9, extrusion spring 12 is connected safety seal seat II 10 and valve body, safety seal seat I8 and safety seal seat II 10 set up the sealed pad 11 of a plurality of embeddings with sealed spheroid 9 junction. Little moment of torsion opening mechanism is including opening knob 13 and ring packing 14, opens knob 13 and sets up at sealed spheroid 9's top, and the valve body is located sealed spheroid 9's top and has seted up the spread groove, and the spread groove is sealed to be provided with and opens knob 13, opens the inner wall fixedly connected with ring packing 14 of knob 13 and spread groove, opens and has seted up start-up groove 15 in the knob 13.

Sealed spheroid 9 adopts stainless steel material to make, the valve body adopts carbide material to make, the sealed face of safe seal seat I8 and safe seal seat II 10 adds the sealing layer that has the polytetrafluoroethylene material, the notch part of start-up groove 15 and the working face phase-match of knob spanner, the lateral wall of safe seal seat I8 and safe seal seat II 10 inlays and is equipped with a plurality of ring type seal 14, a plurality of ring type seal 14 seal horizontal passage jointly, the valve body both ends are passed through the oil pipe sleeve and are detained the type and connect respectively on oil pipe.

When in underground operation, the plug valve is required to be connected to an oil pipe according to two ends of a connecting buckle type respectively, the pressure direction is illustrated along the left side direction of the figure 1, the pressure direction is mainly realized by adjusting a locking nut 7, a safety sealing seat I, an extrusion sealing ball body 9 and the other end of a valve body, namely a safety sealing seat II 10 at the right side end, the extrusion sealing ball body 9 is simultaneously extruded under the action of an extrusion spring 12, and a safety sealing mechanism is formed by embedding a sealing gasket 11 and an annular sealing ring 14.

The other trend of pressure is that pressure gets into the valve body inner chamber from the left side end and promotes interlocking piston I1 and remove and open, through sealed end cap 2 spacing sealed, pressure gets into pressure balance passageway 4 from interlocking piston I1's pointed end this moment and promotes interlocking piston II 3 and remove and close, opens one and closes and form hydraulic interlocking, and the passageway end is leaned on 5 sealed pipes of rubber packing to twist by housing screw 6 and is pressed on the valve body.

At the moment, pressure directly enters the sealing cavity formed by the sealing ball body 9, the safety sealing seat I8, the safety sealing seat II 10, the embedded sealing gasket 11, the opening knob 13, the annular sealing ring 14 and the valve body, namely, the pressure of the space where the inlet at the left end of the valve body is located is balanced with the pressure of the space where the sealing ball body 9 is located, the ball body is in a free state, and the ball body is extremely small in resistance and easy to open.

The next step is to enter a small-torque opening mechanism, under the above pressure balance state, a knob wrench is inserted into the opening knob 13 and is rotated for 90 degrees according to the appointed mark opening direction, the opening is completed, the pressure of the space where the ball body is located is balanced with the pressure of an external inlet, the ball body is in a free state, the resistance of the ball body is extremely small, the opening torque is small, the difficult problems that the ball body is difficult to open due to the extrusion of the pressure of the external inlet and the damage is serious are overcome, and therefore the effects that the opening torque is small, quick and convenient, the working efficiency is improved, and the service life is prolonged are achieved.

On the contrary, if pressure enters the inner cavity of the valve body from the right side end, the pressure trend mainly extrudes the sealing ball body 9 through the safety sealing seat II 10, the left side end of the other end of the valve body simultaneously extrudes the sealing ball body 9 through the safety sealing seat I8 under the locking of the adjusting locking nut 7, and the other end of the valve body forms a safety sealing mechanism through the embedded sealing gasket 11 and the annular sealing ring 14.

The other trend of the pressure is that the pressure enters the inner cavity of the valve body from the right side end to push the interlocking piston II 3 to move and open, the spacing sealing is carried out through the sealing plug 2, at the moment, the pressure enters the pressure balancing channel 4 from the tip end of the interlocking piston II 3 to push the interlocking piston I1 to move and close, and hydraulic interlocking is formed by opening and closing.

At the moment, the pressure directly enters the outside of the 9-sealing ball body, the 8-sealing ball body, the I10-sealing seat and the II 11-sealing seat are embedded into a sealing cavity formed by an opening knob 14O-shaped sealing ring of a sealing gasket 13 and the valve body, namely, the pressure at the inlet of the right side end of the valve body is balanced with the pressure in the space where the 9-sealing ball body is located, the ball body is in a free state, and the ball body has extremely small resistance.

The hydraulic interlocking state is under above pressure balance's state, inserts knob spanner and opens knob 13 in according to appointed sign opening direction rotation 90 degrees promptly and open, the pressure and the outside entry pressure balance in the space that the spheroid was located this moment, the spheroid is in free state, the spheroid resistance is minimum consequently open the moment of torsion just little, overcomes outside entry pressure extrusion and makes the spheroid be difficult to open and damage serious difficult problem to reach and open the effect that the moment of torsion is little swift convenient, improved work efficiency and increase of service life.

Claims

1. A bidirectional pressure balance type plug valve opening mechanism comprises a valve body, an interlocking piston I (1), a sealing plug (2), an interlocking piston II (3), a pressure balance channel (4), a rubber sealing gasket (5), a compression screw (6), an adjusting locking nut (7), a safety sealing seat I (8), a sealing ball body (9), a safety sealing seat II (10), an embedding sealing gasket (11), an extrusion spring (12), an opening knob (13) and an annular sealing ring (14), wherein the valve body is internally provided with a horizontal channel, the bidirectional pressure balance type plug valve opening mechanism is characterized in that the pressure balance mechanism is respectively formed by the structure, the safety sealing mechanism and a small torque opening mechanism are respectively connected with the pressure balance structure, the pressure balance structure comprises the interlocking piston I (1), the sealing plug (2), the interlocking piston II (3), the pressure balance channel (4), the rubber sealing gasket (5) and the compression screw (6), the pressure balance channel (4) is arranged below the horizontal channel of the valve body, two sides of the pressure balance channel (4) are respectively connected with the interlocking piston I (1) and the interlocking piston II (3) in a sealing way, one side of the pressure balance channel (4) penetrates through the inner wall of the valve body and is communicated with the external sealing plug (2), and the sealing plug (6) is connected with the sealing plug (2), safety seal mechanism includes adjusting lock nut (7), safe seal receptacle I (8), sealed spheroid (9), safe seal receptacle II (10), the sealed pad of embedding (11) and extrusion spring (12), adjusting lock nut (7) will be safe seal receptacle I (8) and sealed spheroid (9) reciprocal anchorage, safe seal receptacle II (10) is fixed to be set up in one side of keeping away from safe seal receptacle I (8) in sealed spheroid (9), extrusion spring (12) are connected safe seal receptacle II (10) with the valve body, safe seal receptacle I (8) and safe seal receptacle II (10) set up a plurality of embedded seal pads (11) with the junction of sealed spheroid (9), little moment of torsion opening mechanism is including opening knob (13) and ring packing (14), it sets up the top in sealed spheroid (9) to open knob (13), the valve body is located the top of sealed spread groove spheroid (9) and has seted up spread, sealed being provided with opens knob (13), the inner wall fixed ring packing (14) that opens knob (13) and spread groove (9) are connected with, it has open starting knob (15) to open knob (13).

2. The opening mechanism of a bidirectional pressure balanced plug valve according to claim 1, wherein the sealing ball (9) is made of stainless steel, the valve body is made of hard alloy, and sealing layers made of polytetrafluoroethylene are added to the sealing surfaces of the safety sealing seat I (8) and the safety sealing seat II (10).

3. The opening mechanism of the two-way pressure balance type plug valve according to claim 2, wherein the notch part of the starting groove (15) is matched with the working surface of a knob wrench, a plurality of annular sealing rings (14) are embedded on the outer side walls of the safety sealing seat I (8) and the safety sealing seat II (10), the annular sealing rings (14) jointly seal a horizontal channel, and two ends of the valve body are respectively connected to an oil pipe through an oil pipe sleeve buckle type.