CN111998090B

CN111998090B - Integrated internal bypass high-pressure low-torque opening and closing ball valve and installation method thereof

Info

Publication number: CN111998090B
Application number: CN202010899188.3A
Authority: CN
Inventors: 钱玉峰; 陈继江; 沈圣华
Original assignee: Jiangsu Evalve Co ltd
Current assignee: Jiangsu Evalve Co ltd
Priority date: 2020-08-31
Filing date: 2020-08-31
Publication date: 2022-04-12
Anticipated expiration: 2040-08-31
Also published as: CN111998090A

Abstract

The invention relates to the technical field of mechanical valves, in particular to an integrated internal bypass high-pressure low-torque opening and closing ball valve and an installation method thereof. The stop valve of the invention enables the ball valve to be opened and closed after the pressure difference between the front part and the rear part of the valve reaches zero, improves the sealing performance, simultaneously improves the service life of the valve without overcoming the great torque of the valve rod, has the requirements of high reliability, short stop time and zero leakage, and has the advantages of compact structure, simple and safe structure without an external branch pipe and higher sealing performance because the vent hole forms a passage which is lower than the two stop valves.

Description

Integrated internal bypass high-pressure low-torque opening and closing ball valve and installation method thereof

Technical Field

The invention relates to an opening and closing ball valve and an installation method thereof, in particular to an integrated internal bypass high-pressure low-torque opening and closing ball valve and an installation method thereof, and belongs to the technical field of mechanical valves.

Background

The deepwater natural gas drilling platform is one of the most difficult and dangerous places for living, working and flow control system maintenance, and a highly reliable valve is particularly needed, has the advantages of shortest downtime, lowest maintenance cost and strict execution of the international standard of low leakage discharge, and achieves zero leakage, low torque and high pressure difference resistance;

the existing valve is made of common metal, the pressure born by the valve is low, the high differential pressure cannot be overcome during opening and closing, the torque of a valve rod is small, meanwhile, a ball body and a valve seat need to overcome high friction force during use, the service life of the valve designed conventionally is very short, the valve rod is easy to break under common conditions, the sealing of the ball body and the valve seat is easy to scratch and cannot be sealed continuously, and therefore leakage can be caused, the service life of the valve is seriously reduced, the later maintenance and replacement cost is improved, meanwhile, immeasurable loss can be caused to life and work, and the requirements of life and production cannot be met;

therefore, there is a need for an improved high pressure low torque on/off ball valve that solves the above-mentioned problems.

Disclosure of Invention

The invention aims to provide an integrated internal bypass high-pressure low-torque opening and closing ball valve and an installation method thereof.

In order to achieve the purpose, the invention adopts the main technical scheme that:

an integrated internal bypass high-pressure low-torque opening and closing ball valve comprises a valve body and is characterized in that the valve body comprises a valve seat and a valve cover, the valve body and the valve cover are fixedly connected through a first stud, a second nut is screwed and connected onto the first stud, the valve cover is rotatably connected onto the first stud, and a support ring is fixedly arranged at the connection position of the valve seat and the valve cover;

a ball body is arranged in the valve seat, a sealing ring and a disc spring are fixedly arranged at the joint of the valve body and one end of the valve seat, a supporting ring is fixedly arranged at the joint of the valve cover and the valve seat, and a second square ring is fixedly arranged on the ball body at one side of the supporting ring;

a bottom shaft is fixedly arranged at the bottom of the valve body through a second screw, an anti-wear pad is fixedly arranged at the joint of the upper side surface of the bottom shaft and the ball body, a second bearing is fixedly arranged at the joint of the bottom shaft and the ball body, and a second winding pad is fixedly arranged at the joint of the bottom shaft and the valve body;

a support is fixedly arranged on the outer side surface of the valve body, two ends of the support are fixed on the valve body through third screws, a gasket is fixedly arranged between the third screws and the support, a turbine reducer is fixedly arranged on the support, a plurality of third studs which are uniformly distributed are fixedly arranged at the bottom end of the turbine reducer, the third studs penetrate through the upper end of the support and are fixedly connected with first nuts, a stuffing box is fixedly arranged below the support, a stuffing pressing plate is fixedly arranged above the stuffing box, the stuffing box is fixedly connected with the stuffing pressing plate through second studs, the second studs are in screwed connection with first nuts, a valve rod is arranged on the turbine reducer, the valve rod penetrates through the stuffing box and the stuffing pressing plate and is connected with the upper end of the ball body, and a valve rod stuffing and a first stuffing pressing sleeve are fixedly arranged between the stuffing box and the valve rod, a first bearing is fixedly arranged at the joint of the stuffing box and the ball body, and a middle flange gasket is fixedly arranged at the joint of the valve cover and the valve body;

a stop valve cover is fixedly arranged on one side of the valve body and fixedly connected with the valve body through a plurality of fourth studs, third nuts are rotatably arranged on the fourth studs, a stop valve rod is rotatably arranged in the stop valve cover, one end of the stop valve rod is of a conical structure, a hand wheel fixedly connected with the other end of the stop valve rod through the fourth nuts is fixedly arranged at the joint of the outer side of the stop valve cover and the stop valve rod, and a packing gland nut is fixedly arranged in the packing gland nut;

the valve gap with the inside of valve body one side has all been seted up the air vent, the inside air vent of valve gap with the fixed interior bypass joint that is provided with in the inside air vent junction of valve body, the both ends that interior bypass connects are all fixed to be provided with sealed the pad, on the valve gap with the fixed third end cap that is provided with in junction of air vent, the inside of valve body with the fixed first end cap and the second end cap that are provided with in junction of air vent.

Preferably, the valve body is of an integrally formed structure, a hexagon bolt is fixedly arranged on one side of the valve body, and a manual wheel is rotatably arranged on the turbine speed reducer.

Preferably, a plurality of third square rings which are uniformly distributed are fixedly arranged on the bottom shaft, and the rubber rings are placed inside the third square rings.

Preferably, a first screw is fixedly arranged at the joint of the stuffing box and the upper end of the valve body, and a first winding pad is fixedly arranged on the valve body on one side of the first screw.

Preferably, a thrust washer is fixedly arranged at the joint of the lower end of the stuffing box and the valve rod, a first square ring and a fourth square ring are arranged at the joint of the valve body and the valve cover, and rubber rings are arranged inside the first square ring and the fourth square ring.

Preferably, a filler is fixedly arranged at the joint of the stop valve rod and the stop valve cover.

Preferably, a third winding pad is fixedly arranged at the joint of the stop valve cover and the valve body.

An installation method of an integrated internal bypass high-pressure low-torque opening and closing ball valve comprises the following steps:

the method comprises the following steps: firstly, a valve body and a valve cover are provided with a plurality of vertical and horizontal vent holes, the vent holes are communicated with each other through the inside of the valve body and the valve cover, and then the vent holes are sealed and welded at three positions by plugs to form a passage with a lower inlet and a higher outlet than two stop valves;

step two: then connecting the vent holes together by using an inner bypass joint, and sealing by using a sealing gasket;

step three: processing a conical sealing surface on the valve body, overlaying super-wear-resistant hard alloy as a sealing surface of a valve seat of the stop valve, fixing a hand wheel on a stop valve rod through a nut, then installing the stop valve rod in the stop valve, installing a filler and a filler pressing sleeve, and finally installing a stop valve cover through a stud;

step four: then the bottom shaft and the bracket are installed, and finally the valve cover of the stop valve is bolted with the main valve body through four bolts.

The invention has at least the following beneficial effects:

1. the stop valve is arranged on the valve body and the valve cover through an inner bypass structure, high pressure difference between the front of the valve and the rear of the valve is solved, the ball valve is opened and closed after the pressure difference between the front of the valve and the rear of the valve reaches zero, the torque of the ball valve is almost reduced by more than 90%, the valve rod does not need to overcome great torque, the ball body and the valve seat do not need to overcome high friction, and the service life of the valve is greatly prolonged. The system has the advantages of high reliability, short shutdown time, minimum maintenance cost, strict execution of the international standard of low leakage discharge and zero leakage requirement.

2. The stop valve is opened and closed, so that the reliability is high, the downtime is short, the maintenance cost is kept to the minimum, the sealing ring, the sealing gasket, the sealing ring and the filler are strictly arranged to execute the international standard of low-leakage discharge, and the zero-leakage requirement is met.

3. Several air holes are drilled on the valve body and the valve cover, and after the air holes are communicated with each other through the inside, the air holes are sealed and welded at three positions to form a passage which is lower than the two stop valves, an internal bypass is completed in the valve body, the structure is compact, no external branch pipe is used, the structure is simple and safe, and the sealing performance is higher.

4. The conical sealing surface is processed on the valve body, and the super-wear-resistant hard alloy is overlaid on the valve body to serve as the sealing surface of the valve seat of the stop valve, so that the valve is long in service life, compact in structure, safe and reliable in sealing, the sealing of the valve body and the valve cover is connected at the joint part of the valve body and the valve cover through the structure of the set of inner bypass joint and the sealing gasket, and the valve is simple in structure and safe and reliable in sealing.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a front cross-sectional view of the present invention;

FIG. 2 is a left side cross-sectional view of the present invention;

FIG. 3 is a top cross-sectional view of the present invention;

fig. 4 is an enlarged view of a portion a in fig. 3.

In the figure, 1-ball, 2-valve seat, 3-sealing ring, 4-support ring, 5-disc spring, 6-valve body, 7-valve cover, 8-valve rod, 9-thrust gasket, 10-valve rod packing, 11-first packing press sleeve, 12-packing press plate, 13-middle flange gasket, 14-first stud, 15-bracket, 16-second stud, 17-packing box, 18-first screw, 19-bottom shaft, 20-second screw, 21-washer, 22-first bearing, 23-second bearing, 24-antifriction pad, 25-first winding pad, 26-second winding pad, 27-hexagon bolt, 28-third stud, 29-first nut, 30-third screw, 31-first square ring, 32-a second square ring, 33-a third square ring, 34-a fourth square ring, 35-a second nut, 36-a first plug, 37-a second plug, 38-a third plug, 39-a stop valve cover, 40-a fourth stud, 41-a third nut, 42-a turbo reducer, 43-a stop valve rod, 44-a filler, 45-a second filler pressing sleeve, 46-a filler pressing cover nut, 47-a hand wheel, 48-a fourth nut, 49-a third winding pad, 50-an internal bypass joint, 51-a sealing pad and 52-a vent hole.

Detailed Description

Embodiments of the present application will be described in detail with reference to the drawings and examples, so that how to implement technical means to solve technical problems and achieve technical effects of the present application can be fully understood and implemented.

As shown in fig. 1-4, the integrated internal bypass high-pressure low-torque on-off ball valve and the installation method thereof provided by the embodiment include a valve body 6, the valve body 6 includes a valve seat 2 and a valve cover 7, the valve seat 2 is of an integrally formed structure, a hexagon bolt 27 is fixedly arranged on one side of the valve seat 2, a manual wheel is rotatably arranged on a turbine reducer 42, the valve body 6 and the valve cover 7 are fixedly connected through a first stud 14, a second nut 35 is rotatably connected on the first stud 14, the valve cover 7 is rotatably connected on the first stud 14, a support ring 4 is fixedly arranged at the connection position of the valve seat 2 and the valve cover 7, and a joint of the valve body 6 and the valve cover 7 is simple in structure and safe and reliable in sealing;

the ball body 1 is arranged in the valve seat 2, the sealing ring 3 and the disc spring 5 are fixedly arranged at the joint of the valve body 6 and one end of the valve seat 2, the supporting ring 4 is fixedly arranged at the joint of the valve cover 7 and the valve seat 2, and the second square ring 32 is fixedly arranged on the ball body 1 at one side of the supporting ring 4, so that the connection is safe and reliable, and the ultrahigh pressure sealing is resistant;

the bottom of the valve body 6 is fixedly provided with a bottom shaft 19 through a second screw 20, the joint of the upper side surface of the bottom shaft 19 and the ball body 1 is fixedly provided with an antifriction pad 24, the joint of the bottom shaft 19 and the ball body 1 is fixedly provided with a second bearing 23, the joint of the bottom shaft 19 and the valve body 6 is fixedly provided with a second winding pad 26, the bottom shaft 19 is fixedly provided with a plurality of third square rings 33 which are uniformly distributed, rubber rings are placed inside the third square rings 33, the structure is simple, and the practicability and the safety are improved;

a support 15 is fixedly arranged on the outer side surface of the valve body 6, two ends of the support 15 are fixed on the valve seat 2 through third screws 30, a gasket 21 is fixedly arranged between the third screws 30 and the support 15, a turbine reducer 42 is fixedly arranged on the support 15, a plurality of third studs 28 which are uniformly distributed are fixedly arranged at the bottom end of the turbine reducer 42, the third studs 28 penetrate through the upper end of the support 15 and are fixedly connected with first nuts 29, a stuffing box 17 is fixedly arranged below the support 15, a first screw 18 is fixedly arranged at the joint of the stuffing box 17 and the upper end of the valve seat 2, a first winding pad 25 is fixedly arranged on the valve seat 2 at one side of the first screw 18, a stuffing pressing plate 12 is fixedly arranged above the stuffing box 17, the stuffing box 17 is fixedly connected with the stuffing pressing plate 12 through a second stud 16, the first nut 29 is rotatably connected on the second stud 16, a valve rod 8 is arranged on the turbine reducer 42, the valve rod 8 penetrates through the stuffing box 17 and the stuffing pressing plate 12 and is connected with the upper end of the ball body 1, a valve rod stuffing 10 and a first stuffing pressing sleeve 11 are fixedly arranged between the stuffing box 17 and the valve rod 8, a first bearing 22 is fixedly arranged at the joint of the stuffing box 17 and the ball body 1, a middle flange gasket 13 is fixedly arranged at the joint of the valve cover 7 and the valve body 6, a thrust gasket 9 is fixedly arranged at the joint of the lower end of the stuffing box 17 and the valve rod 8, a first square ring 31 and a fourth square ring 34 are arranged at the joint of the valve body 6 and the valve cover 7, rubber rings are arranged inside the first square ring 31 and the fourth square ring 34, an operating mechanism of the main valve is fixed by adopting an independent bracket, the valve rod 8 only transmits torque, the stuffing box 17 does not bear the lateral force of the operating mechanism, the sealing reliability of the stuffing 44 is ensured, the strict international standard for executing low leakage discharge reaches the requirement of zero leakage;

a stop valve cover 39 is fixedly arranged on one side of the valve body 6, a third winding pad 49 is fixedly arranged at the joint of the stop valve cover 39 and the valve body 6, the stop valve cover 39 is fixedly connected with the valve body 6 through a plurality of fourth studs 40, third nuts 41 are rotatably arranged on the fourth studs 40, a stop valve rod 43 is rotatably arranged in the stop valve cover 39, a packing 44 is fixedly arranged at the joint of the stop valve rod 43 and the stop valve cover 39, one end of the stop valve rod 43 is of a conical structure, a hand wheel 47 fixedly connected through a fourth nut 48 is fixedly arranged at the other end of the stop valve rod 43, a packing gland nut 46 is fixedly arranged at the joint of the outer side of the stop valve cover 39 and the stop valve rod 43, and a second packing gland sleeve 45 is arranged in the packing gland nut 46;

vent holes 52 are respectively formed in the valve cover 7 and one side of the valve body 6, an inner bypass connector 50 is fixedly arranged at the joint of the vent hole 52 in the valve cover 7 and the vent hole 52 in the valve body 6, sealing gaskets 51 are respectively fixedly arranged at two ends of the inner bypass connector 50, a third plug 38 is fixedly arranged at the joint of the vent hole 52 in the valve cover 7, a first plug 36 and a second plug 37 are fixedly arranged at the joint of the vent hole 52 in the valve body 6, a stop valve is arranged on the valve body 6 and the valve cover 7 through an inner bypass structure, high pressure difference between the front part of the valve and the rear part of the valve is solved, the ball valve is opened and closed after the pressure difference between the front part of the valve and the rear part of the valve reaches zero, the torque of the ball valve is almost more than 90 percent of the original torque, the valve rod 8 does not need to overcome great torque, the ball 1 and the valve seat 2 do not need to overcome extremely high friction force, the service life of the valve is greatly prolonged, and the ball valve has high reliability, The shutdown time is short, the maintenance cost is kept at the minimum, the international standard of low leakage discharge is strictly executed, and the requirement of zero leakage is met.

As shown in fig. 1 to 4, the integrated internal bypass high-pressure low-torque opening and closing ball valve and the installation method thereof provided by the present embodiment include the following steps:

the method comprises the following steps: firstly, a plurality of vertical and horizontal vent holes 52 are punched on the valve body 6 and the valve cover 7, and are communicated with each other through the inside, and then are sealed and welded at three positions by plugging to form a passage with a lower inlet and a higher outlet of two stop valves;

step two: then the vent holes 52 are connected together by the inner bypass joint 5 and sealed by the sealing gasket 51;

step three: processing a conical sealing surface on the valve body 6, overlaying super-wear-resistant hard alloy to serve as a sealing surface of the stop valve seat 2, fixing a stop valve rod 43 on a hand wheel 47 through a nut 48, then installing the stop valve rod in the stop valve, installing a filler 44 and a filler pressing sleeve 45, and finally installing a stop valve cover 39 through a stud 40;

step four: then the bottom shaft 19 and the bracket 15 are installed, and finally the valve cover 7 of the stop valve is bolted with the main valve body 6 through the four bolts 14.

As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to achieve the technical effect basically.

It is noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of additional like elements in the article or system in which the element is included.

The foregoing description shows and describes several preferred embodiments of the invention, but as aforementioned, it is to be understood that the invention is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. An integrated internal bypass high-pressure low-torque opening and closing ball valve comprises a valve body (6) and is characterized in that the valve body (6) comprises a valve seat (2) and a valve cover (7), the valve body (6) and the valve cover (7) are fixedly connected through a first stud (14), a second nut (35) is rotatably connected onto the first stud (14), the valve cover (7) is rotatably connected onto the first stud (14), and a support ring (4) is fixedly arranged at the connection position of the valve seat (2) and the valve cover (7);

a ball body (1) is arranged in the valve seat (2), a sealing ring (3) and a disc spring (5) are fixedly arranged at the joint of the valve body (6) and one end of the valve seat (2), a support ring (4) is fixedly arranged at the joint of the valve cover (7) and the valve seat (2), and a second square ring (32) is fixedly arranged on the ball body (1) at one side of the support ring (4);

a bottom shaft (19) is fixedly arranged at the bottom of the valve body (6) through a second screw (20), an anti-wear pad (24) is fixedly arranged at the joint of the upper side surface of the bottom shaft (19) and the ball body (1), a second bearing (23) is fixedly arranged at the joint of the bottom shaft (19) and the ball body (1), and a second winding pad (26) is fixedly arranged at the joint of the bottom shaft (19) and the valve body (6);

a support (15) is fixedly arranged on the outer side surface of the valve body (6), two ends of the support (15) are fixed on the valve body (6) through third screws (30), a gasket (21) is fixedly arranged between the third screws (30) and the support (15), a turbine reducer (42) is fixedly arranged on the support (15), a plurality of third studs (28) which are uniformly distributed are fixedly arranged at the bottom end of the turbine reducer (42), the third studs (28) penetrate through the upper end of the support (15) and are fixedly connected with first nuts (29), a packing box (17) is fixedly arranged below the support (15), a packing pressing plate (12) is fixedly arranged above the packing box (17), the packing box (17) is fixedly connected with the packing pressing plate (12) through second studs (16), and first nuts (29) are screwed on the second studs (16), a valve rod (8) is arranged on the turbine speed reducer (42), the valve rod (8) penetrates through the stuffing box (17) and the stuffing pressing plate (12) and is connected with the upper end of the ball body (1), a valve rod stuffing (10) and a first stuffing pressing sleeve (11) are fixedly arranged between the stuffing box (17) and the valve rod (8), a first bearing (22) is fixedly arranged at the joint of the stuffing box (17) and the ball body (1), and a middle flange gasket (13) is fixedly arranged at the joint of the valve cover (7) and the valve body (6);

a stop valve cover (39) is fixedly arranged on one side of the valve body (6), the stop valve cover (39) is fixedly connected with the valve body (6) through a plurality of fourth studs (40), third nuts (41) are rotatably arranged on the fourth studs (40), a stop valve rod (43) is rotatably arranged inside the stop valve cover (39), one end of the stop valve rod (43) is of a conical structure, a hand wheel (47) fixedly connected through a fourth nut (48) is fixedly arranged at the other end of the stop valve rod (43), a packing gland nut (46) is fixedly arranged at the connection position of the outer side of the stop valve cover (39) and the stop valve rod (43), and a second packing gland sleeve (45) is arranged inside the packing gland nut (46);

air vent (52) have all been seted up to valve gap (7) with the inside of valve body (6) one side, valve gap (7) inside air vent (52) with fixed interior bypass joint (50) that is provided with of valve body (6) inside air vent (52) junction, the both ends of interior bypass joint (50) all are fixed and are provided with sealed pad (51), on valve gap (7) with the fixed third end cap (38) that is provided with in junction of air vent (52), the inside of valve body (6) with the fixed first end cap (36) and the second end cap (37) that are provided with in junction of air vent (52).

2. The integrated internal bypass high-pressure low-torque on-off ball valve as claimed in claim 1, wherein: the valve body (6) is of an integrally formed structure, a hexagon bolt (27) is fixedly arranged on one side of the valve body (6), and a manual wheel is arranged on the turbine speed reducer (42) in a rotating mode.

3. The integrated internal bypass high-pressure low-torque on-off ball valve as claimed in claim 1, wherein: a plurality of third square rings (33) which are uniformly distributed are fixedly arranged on the bottom shaft (19), and rubber rings are placed inside the third square rings (33).

4. The integrated internal bypass high-pressure low-torque on-off ball valve as claimed in claim 1, wherein: a first screw (18) is fixedly arranged at the joint of the stuffing box (17) and the upper end of the valve body (6), and a first winding pad (25) is fixedly arranged on the valve body (6) on one side of the first screw (18).

5. The integrated internal bypass high-pressure low-torque on-off ball valve as claimed in claim 1, wherein: the connecting part of the lower end of the stuffing box (17) and the valve rod (8) is fixedly provided with a thrust washer (9), the connecting part of the valve body (6) and the valve cover (7) is provided with a first square ring (31) and a fourth square ring (34), and rubber rings are arranged inside the first square ring (31) and the fourth square ring (34).

6. The integrated internal bypass high-pressure low-torque on-off ball valve as claimed in claim 1, wherein: and a filler (44) is fixedly arranged at the joint of the stop valve rod (43) and the stop valve cover (39).

7. The integrated internal bypass high-pressure low-torque on-off ball valve as claimed in claim 1, wherein: and a third winding pad (49) is fixedly arranged at the joint of the stop valve cover (39) and the valve body (6).

8. An installation method of an integrated internal bypass high-pressure low-torque opening and closing ball valve is characterized by comprising the following steps: