CN214534602U

CN214534602U - Underwater control valve

Info

Publication number: CN214534602U
Application number: CN202120326738.2U
Authority: CN
Inventors: 谢玉东; 郭卿炜; 吕凯; 王勇; 廖希亮
Original assignee: Shandong University
Current assignee: Shandong University
Priority date: 2021-02-04
Filing date: 2021-02-04
Publication date: 2021-10-29
Anticipated expiration: 2031-02-04

Abstract

The utility model discloses an underwater control valve has solved the problem that the control valve leakproofness can't be guaranteed under water among the prior art, has the beneficial effect that improves control valve and use reliability, and concrete scheme is as follows: an underwater control valve comprises a valve body, wherein a fluid channel is arranged in the valve body, and a diameter increasing section is arranged in the fluid channel of the valve body; the valve rod penetrates through the valve body and can rotate relative to the valve body; the valve core is arranged at the diameter enlarging section and is connected with the valve rod, the valve core is provided with a through hole which can be communicated with the fluid channel, the valve body is respectively provided with a valve seat at the upstream and the downstream of the valve core, the valve seat is matched with the valve body through a special-shaped surface, an elastic piece is arranged at the matching surface of the valve body and the valve seat, the valve seat is connected with the elastic piece, and a middle cavity is formed between the non-valve seat matching surface of the valve core and the valve body; the contact surface of the valve seat and the valve body is provided with a first sealing element, and the contact surface of the valve seat and the valve core is provided with a second sealing element.

Description

Underwater control valve

Technical Field

The utility model belongs to the technical field of the control valve and specifically relates to an underwater control valve.

Background

The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.

The underwater control valve is a general name of all valves applied to underwater pipelines, is mainly and intensively applied to underwater manifolds and conveying pipelines of ocean oil and gas engineering, and has certain application to deep sea submersibles.

The underwater control valve is mostly applied to oil and gas pipelines, and the inventor finds that the existing underwater valve has the following problems:

first, for a control valve, temperature changes can cause valve leakage, which affects the use of the control valve and reduces the reliability of the valve.

Secondly, the control valve works underwater, the valve rod is easy to wear, the maintenance and replacement after the wear are difficult, and the underwater maintenance cost is very high.

Third, the subsea control valve stem is prone to static electricity during operation, and when the subsea control valve is used to control flammable media, static sparks can pose a fire or explosion hazard.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims at providing an underwater control valve, control valve have that valve rod wearing and tearing are little, prevent static, can automatic pressure release, guarantee that the valve uses the reliability.

In order to achieve the above purpose, the present invention is realized by the following technical solution:

a subsea control valve, comprising:

the valve body is internally provided with a fluid channel, and the valve body is provided with a diameter increasing section in the fluid channel;

the valve rod penetrates through the valve body and can rotate relative to the valve body;

the valve core is arranged at the diameter enlarging section and is connected with the valve rod, the valve core is provided with a through hole which can be communicated with the fluid channel, the valve body is respectively provided with a valve seat at the upstream and the downstream of the valve core, the valve seat is matched with the valve body through a special-shaped surface, an elastic piece is arranged at the matching surface of the valve body and the valve seat, the valve seat is connected with the elastic piece, and a middle cavity is formed between the non-valve seat matching surface of the valve core and the valve body; the contact surface of the valve seat and the valve body is provided with a first sealing element, and the contact surface of the valve seat and the valve core is provided with a second sealing element.

In order to facilitate installation of the elastic member and the first sealing member, the profiled surface is a plurality of continuous steps, and the first sealing member and the elastic member are arranged through the steps.

A subsea control valve as described above, said first seal being disposed proximate said fluid passageway relative to said resilient member.

According to the underwater control valve, the contact surface of the valve core and the valve seat is a spherical surface; the connecting surface of the valve core and the valve rod is a plane;

the middle part of the connecting surface of the valve core and the valve rod is provided with a groove for installing the valve rod.

According to the underwater control valve, the valve core is provided with the clamping groove relative to the opposite surface of the connecting surface connected with the valve rod, the clamping groove is used for installing the supporting shaft, and the supporting shaft can be rotatably installed on the valve body.

The underwater control valve comprises a valve seat, a valve core and a valve seat, wherein the valve seat comprises an upstream valve seat and a downstream valve seat which are arranged on two sides of the valve core, the upstream valve seat and the downstream valve seat are both annular parts, and second sealing parts are arranged on the upstream valve seat and the downstream valve seat;

one end of the second sealing element is fixed on the upstream valve seat or the downstream valve seat, and the other end of the second sealing element is matched with the spherical surface of the valve core in shape.

In the underwater control valve, the end part of the valve rod connected with the valve core is provided with the first anti-static part;

the tip of valve rod sets up the trompil, and first antistatic backing spare is connected with the spheroid including locating the electrically conductive elastic component in the valve rod trompil, electrically conductive elastic component, and the case setting is used for with spheroid complex arc mouth.

The underwater control valve is characterized in that the valve rod is provided with a second anti-static part at the contact part with the valve body;

the valve body sets up the trompil, and the static piece is prevented including the electrically conductive elastic component of locating in the valve body trompil to the second, and electrically conductive elastic component is connected with the spheroid, and the valve body setting is used for preventing static piece for face contact, effectively electrically conductive with the second with the spheroid complex arc mouth for the valve body.

The underwater control valve is characterized in that the valve body is connected with the bearing cover at the position where the valve rod penetrates through the valve body, and the valve rod is respectively connected with the bearing cover and the valve body through a plurality of bearings;

and the valve rod is respectively provided with a third sealing element at two sides of the bearing.

The underwater control valve is characterized in that the valve body is provided with a flange end at each end of the fluid channel.

Above-mentioned the utility model has the advantages as follows:

1) the utility model has the advantages that the valve seat is arranged between the valve body and the valve core, the valve seat is provided with the elastic part, and the sealing performance between the valve body and the valve core can be ensured through the arrangement of the first sealing part and the second sealing part, so that the use reliability of the underwater control valve is ensured; even if the pressure of the middle cavity rises abnormally, the elastic piece is arranged, so that the middle cavity can be effectively decompressed under the pressure action of the fluid medium, the downstream leakage amount is reduced, the reliability of the control valve is further ensured, and the influence of temperature rise on valve leakage is reduced.

2) The utility model discloses a set up first sealing member in one side of upstream disk seat and low reaches disk seat, the opposite side sets up the second sealing member, can effectively guarantee the sealing performance between two disk seats and valve body, the case, need not to set up the processing groove at the case, convenient processing.

3) The utility model discloses a bearing supports the valve rod, and the valve rod is rotatable, wholly can effectively reduce the wearing and tearing of valve rod for control valve long service life has reduced the maintenance cost under water.

4) The utility model can discharge the static electricity generated in the rotating process of the valve rod and the valve core out of the control valve through the valve rod by arranging the first anti-static part and the second anti-static part, thereby improving the use safety of the control valve; can be used for controlling dangerous fluid and has better safety performance.

5) The utility model discloses the first static piece of preventing and the second prevents that static passes through the setting of spheroid and electrically conductive elastic component, can guarantee to prevent the area of contact of static piece and valve body or case, the static that effective discharge produced.

Drawings

The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without unduly limiting the scope of the invention.

Fig. 1 is a cross-sectional view of an underwater control valve according to one or more embodiments of the present invention.

Fig. 2 is an enlarged view of a portion of an underwater control valve according to one or more embodiments of the present invention.

Fig. 3 is a schematic diagram of cavity pressure relief in an underwater control valve according to one or more embodiments of the present invention.

Fig. 4 is a schematic diagram of a first anti-static component of an underwater control valve according to one or more embodiments of the present invention.

Fig. 5 is a schematic diagram of a second anti-static component of an underwater control valve according to one or more embodiments of the present invention.

In the figure: the spacing or dimensions between each other are exaggerated to show the location of the various parts, and the schematic is shown only schematically.

Wherein: 1. the valve comprises an ROV interface, 2, a bearing sealing ring, 3, a bearing cover, 4, a valve body, 5, a valve core, 6, a downstream valve seat, 7, an upstream valve seat, 8, a first anti-static piece, 9, a second anti-static piece, 10, a valve rod bearing, 11, a valve rod, 12, an actuating mechanism, 13, a battery, 14, a valve seat body, 15, a valve seat sealing ring, 16, a valve seat spring, 17, a second sealing piece, 18, a ball, 19, a supporting seat and 20.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, unless the invention expressly state otherwise, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;

for convenience of description, the words "upper", "lower", "left" and "right" in the present invention, if any, merely indicate that the directions of movement of the device or element are consistent with those of the drawings, and do not limit the structure, but merely facilitate the description of the invention and simplify the description, rather than indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.

Term interpretation section: the terms "mounted," "connected," "fixed," and the like in the present invention are to be understood in a broad sense, for example, they may be fixedly connected, detachably connected, or integrated; the two components can be connected mechanically or electrically, directly or indirectly through an intermediate medium, or connected internally or in an interaction relationship, and specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Just as the background art introduces, there is the problem that the control valve temperature variation influences the reliability under water among the prior art, in order to solve above-mentioned technical problem, the utility model provides a control valve under water.

In a typical embodiment of the present invention, referring to fig. 1, an underwater control valve includes:

the valve body 4 is internally provided with a fluid channel, and the middle part of the fluid channel of the valve body is provided with a diameter enlarging section;

the valve rod 11 penetrates through the valve body and can rotate relative to the valve body;

the valve core 5 is arranged at the diameter enlarging section, the valve core is connected with the valve rod, the valve core is provided with a through hole which can be communicated with the fluid channel, the valve body is respectively provided with a valve seat at the upstream and the downstream of the valve core, the valve seat is matched with the valve body through a special-shaped surface, an elastic piece is arranged at the matching surface of the valve body and the valve seat, the valve seat is connected with the elastic piece, and a middle cavity is formed between the non-valve seat matching surface of the valve core and the valve body; the contact surface of the valve seat and the valve body is provided with a first sealing element, and the contact surface of the valve seat and the valve core is provided with a second sealing element.

Under a normal state, the through hole of the valve core is communicated with the fluid channel to realize the opening of the control valve, when the valve rod rotates, the valve core can be driven to rotate for a set angle, and the through hole is not communicated with the fluid channel to realize the closing of the control valve.

In this embodiment, the matching surface of the valve body 4 and the valve seat, i.e. the special-shaped surface, is a plurality of continuous steps, the size of the steps is not fixed, and the steps are adjusted according to structural members arranged at the steps; and valve body 4, valve seat matching surface department set up first sealing member, and first sealing member sets up near fluid passage for the elastic component, sets up first sealing member through the step, avoids fluid medium to get into the lumen through the space between valve seat and the valve body, sets up first sealing member and elastic component through the step.

Specifically, the steps can be provided with three sections, the first section of steps is arranged close to the fluid channel, the second section of steps is provided with a first sealing element, the diameter of the first sealing element is larger than the height of the second section of steps, and the third section of steps is provided with an elastic element; and the height of the first section is smaller than that of the second section of steps, and the height of the second section of steps is smaller than that of the third section of steps.

It should be noted that the first sealing element is an annular element, and as shown in fig. 2, specifically, the first sealing element is an annular valve seat sealing ring 15, and the sealing performance between the valve seat and the valve body is ensured by the valve seat sealing ring 15, and the central axis of the valve seat sealing ring 15 is consistent with the central axis of the fluid passage.

The elastic element is a valve seat spring 16, the valve seat is provided with an opening, a space for accommodating the valve seat spring is formed in the opening of the valve seat, one end of the valve seat spring is fixed with the valve body 4, the other end of the valve seat spring is fixedly connected with the valve seat, and the length direction of the valve seat spring is consistent with the flowing direction of a fluid medium in the fluid channel.

The valve core sets up the draw-in groove for the opposite face of the face of being connected with the valve rod, and the draw-in groove is used for installing the back shaft, and the back shaft is rotatable to be installed in the valve body, and the size of back shaft equals with the diameter of valve rod, and the two the central axis sets up at same straight line, and back shaft accessible copper sheathing is installed in the valve body, through the setting of valve rod and back shaft, guarantees the rotation of valve core for the disk seat.

It should be noted that the contact surface between the valve element 5 and the valve seat is a spherical surface, that is, the contact surface between the valve element and the fluid medium is a spherical surface; the connecting surface of the valve core and the valve rod 11 is a plane, namely the non-valve seat matching surface of the valve core is a plane, namely the connecting surface of the valve core and the supporting shaft is also a plane, so that the arrangement of the middle cavity is convenient;

the middle part of the connecting surface of the valve core and the valve rod is provided with a groove for installing the valve rod, so that the valve rod and the valve core can be ensured to be reliably connected, and the middle part of the connecting surface of the valve core and the supporting shaft is also provided with a clamping groove so as to be conveniently connected with one end of the supporting shaft.

Furthermore, the groove and the clamping groove are both square.

It should be noted that the valve seat comprises an upstream valve seat 7 and a downstream valve seat 6, and the two valve seats can independently cut off the upstream fluid medium and the downstream fluid medium, so that a double-break function is realized, and the sealing performance of the underwater control valve under a normal state is ensured; the upstream valve seat is arranged upstream of the valve element, the upstream valve seat 7 comprises an annular valve seat body 14 arranged upstream of the valve element, and the downstream valve seat 6 is arranged downstream of the valve element and likewise comprises an annular valve seat body arranged downstream of the valve element.

In some examples, the poppet provides a second seal where it contacts the valve seat; the second sealing element is also annular, and the second sealing element 17 is arranged on one side of the upstream valve seat or the downstream valve seat relative to the first sealing ring, so that the middle cavity is ensured to be well separated from the upstream and the downstream; the second sealing element is flat in longitudinal section, one end of the second sealing element is fixed on the upstream valve seat or the downstream valve seat, the shape of the other end of the second sealing element is matched with the spherical surface of the valve core, and namely one side of the second sealing element, which is contacted with the valve core, is an arc-shaped surface.

In order to timely discharge static generated in the rotation process of the valve rod and the valve core, a first static preventing part 8 is arranged at the connecting end of the valve rod and the valve core, an opening is formed in the end part of the valve rod 11 connected with the valve core, as shown in fig. 4, the first static preventing part comprises a conductive elastic part arranged in the opening of the valve rod, one end of the conductive elastic part is connected with the valve rod, the conductive elastic part is a spring 20, the other end of the conductive elastic part is supported by a supporting seat 19, the supporting seat is connected with a ball 18, and the valve core is provided with an arc-shaped opening matched with the ball, so that the first static preventing part is in surface contact with the valve core;

specifically, the materials of the spring 20, the support base 19 and the ball 18 are all conductive materials.

The valve rod is provided with a second anti-static part 9 at the contact position with the valve body, so that the first anti-static part is arranged towards the valve core, the second anti-static part is arranged towards the valve body, and the central lines of the springs in the first anti-static part and the second anti-static part are mutually vertical;

the structure of the first anti-static part is the same as that of the second anti-static part, and through the arrangement of the first anti-static part and the second anti-static part, static electricity generated in the rotation process of the valve rod and the valve core can be discharged out of the control valve through the valve rod, so that the use safety of the control valve is improved;

referring to fig. 5, the side of the valve body is provided with an opening, the second anti-static part comprises a conductive elastic part arranged in the opening of the valve body, the conductive elastic part is connected with the ball body, and the valve body is provided with an arc-shaped opening matched with the ball body, so that the valve body and the second anti-static part are in surface contact and are effectively conductive.

It should be noted that, the two ends of the valve body are respectively flange ends, which is convenient for connecting with other pipelines, one side of the valve body is provided with a bearing cover, the bearing cover 3 is connected with the valve body 4, the valve rod is respectively connected with the bearing cover and the valve body through two bearings 10, namely, the valve body supports the valve rod through one bearing, and the bearing cover supports the valve rod through the other bearing;

the valve rod is provided with third sealing elements on two sides of the bearing respectively, the third sealing elements are bearing sealing rings 2, the bearing sealing rings 2 are also provided with two positions, one position is arranged in the valve body, and the other position is arranged in the bearing cover.

Of course, the valve rod 11 is connected with the actuator 12, the actuator 12 is connected with the power supply mechanism, the actuator is a rotating electrical machine, the power supply mechanism is a battery 13, the actuator 12 is provided with an ROV (underwater robot) interface 1, and the underwater robot controls the action of the rotating electrical machine through the ROV interface.

In the underwater control valve, referring to fig. 3, the valve core is arranged at the variable diameter section through the valve body, the valve body supports the valve core through the valve seat, and the elastic member is arranged between the valve body and the valve seat, so that when the control valve is closed, the pressure of the upstream fluid medium on the valve core is higher than the pressure of the downstream fluid medium on the valve core, and due to the arrangement of the valve seat elastic member, the valve core can be deviated in the downstream direction, so that the sealing performance of the downstream valve seat is improved;

when the fluid medium staying in the middle cavity is vaporized due to temperature rise, so that the pressure of the middle cavity is abnormally increased, the fluid medium in the middle cavity can push the upstream valve seat to leave the ball body by means of the acting force of the fluid medium, the upstream valve seat is automatically decompressed upstream, and the downstream valve seat is pushed to the ball body under the action of pressure difference and sealing pressure of the elastic element, so that the safety of the valve is ensured; meanwhile, the liquid in the middle cavity leaks upstream, the downstream leakage amount is reduced, and the reliability of the control valve is ensured.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An subsea control valve, comprising:

2. A subsea control valve in accordance with claim 1, wherein said contoured surface is a plurality of continuous steps, said first sealing element and said resilient element being provided by the steps.

3. A subsea control valve in accordance with claim 1, wherein the first seal is disposed proximate the fluid passageway relative to the resilient member.

4. The subsea control valve of claim 1, wherein the contact surface of the spool and the valve seat is spherical; the connecting surface of the valve core and the valve rod is a plane;

5. The subsea control valve of claim 1, wherein the spool defines a slot opposite to a connection surface with the stem, the slot being configured to receive a support shaft, the support shaft being rotatably mounted to the valve body.

6. The subsea control valve of claim 1, wherein the valve seat comprises an upstream valve seat and a downstream valve seat disposed on opposite sides of the spool, the upstream valve seat and the downstream valve seat are both annular members, and the second seal is disposed on the upstream valve seat and the downstream valve seat;

7. The subsea control valve of claim 1, where the valve stem is provided with a first anti-static member at an end connected to the spool;

8. A subsea control valve in accordance with claim 1, wherein the valve stem is provided with a second anti-static element at the point of contact with the valve body;

the valve body sets up the trompil, and the second is prevented static and is connected with the spheroid including locating the electrically conductive elastic component in the valve body trompil, electrically conductive elastic component, and the valve body setting is used for with spheroid complex arc mouth.

9. The subsea control valve of claim 1, wherein the valve body is coupled to a bearing cap where the valve stem passes through, the valve stem being coupled to the bearing cap and the valve body via a plurality of bearings, respectively;

10. A subsea control valve in accordance with claim 1, wherein the valve body is provided as a flanged end at each end of the fluid passageway.