CN111442113A - Active prevention and control failure type solid-containing multiphase flow control valve - Google Patents
Active prevention and control failure type solid-containing multiphase flow control valve Download PDFInfo
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- CN111442113A CN111442113A CN202010190555.2A CN202010190555A CN111442113A CN 111442113 A CN111442113 A CN 111442113A CN 202010190555 A CN202010190555 A CN 202010190555A CN 111442113 A CN111442113 A CN 111442113A
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- multiphase flow
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Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/04—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only lift valves
- F16K11/044—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only lift valves with movable valve members positioned between valve seats
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
- F16B7/04—Clamping or clipping connections
- F16B7/0406—Clamping or clipping connections for rods or tubes being coaxial
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/24—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with valve members that, on opening of the valve, are initially lifted from the seat and next are turned around an axis parallel to the seat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/46—Attachment of sealing rings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/04—Means in valves for absorbing fluid energy for decreasing pressure or noise level, the throttle being incorporated in the closure member
- F16K47/045—Means in valves for absorbing fluid energy for decreasing pressure or noise level, the throttle being incorporated in the closure member and the closure member being rotatable
Abstract
The invention relates to the field of valves, in particular to an active prevention and control failure type solid-containing multiphase flow control valve which can be applied to the working condition of a solid-containing multiphase flow medium. The invention comprises a valve body, a valve core, a valve seat, a driving source and a valve rod; a runner groove which has the flow control function is arranged on the valve core; the valve rod comprises an upper valve rod and a lower valve rod, and the lower valve rod is coaxially matched on the upper valve rod in a rotating mode so that the lower valve rod can generate self-rotating action relative to the axis of the upper valve rod; the solid-containing multiphase flow control valve also comprises a driving part which uses flushing medium flow force and/or blowing medium wind force to push the lower valve rod and the valve core to generate self-rotation action. The invention has extremely high operation flexibility, and can delay the abrasion damage rate of the solid-containing multiphase flow medium to the valve internal member, thereby actively reducing or even avoiding the deposition and blockage condition of the solid-containing medium in the valve on the premise of ensuring the high service life of the valve internal member.
Description
Technical Field
The invention relates to the field of valves, in particular to an active prevention and control failure type solid-containing multiphase flow control valve which can be applied to the working condition of a solid-containing multiphase flow medium.
Background
With the trend of crude oil upgrading and degrading, the demand of the market for light oil products is increasing and environmental regulations are stricter, the efficient conversion and clean utilization of coal and heavy/residual oil become the focus of attention of the world oil refining industry, and the solutions are as follows: the process comprises various chemical processes such as direct coal liquefaction, kerosene mixing, poor-quality heavy/residual oil hydrocracking and the like, wherein the processes involve the flow control of a large amount of solid-containing multiphase flow media. Particularly, a control valve of a hot high-pressure separator is indispensable key equipment in a process device, has very harsh working conditions and needs to face medium environments such as high temperature, high pressure difference, corrosion, solid-containing multiphase flow and the like. The control valve mostly adopts an angle type structure and a clean type valve cavity design, the valve inner part mainly adopts a conical head valve core and a Venturi valve seat type, and the control on the multiphase flow medium is realized by forming the change of the throttling area between the parabolic/linear type surface of the valve core and the valve seat, so that the process requirement is met.
For example, chinese patent CN 107725833B discloses a pressure reducing valve, in which at least two sets of valve seats are disposed in a valve body to reduce pressure of fluid and discharge the fluid to a valve outlet. Share a main valve body, mutually independent each other, mutual noninterference can switch in a flexible way or use simultaneously. The technical scheme is only that a set of valve core and valve seat is arranged redundantly, and the problems of blockage, local abrasion and the like when the solid content is large are not effectively solved.
The Chinese patent CN 104633134B discloses a hydrocracking heat high-pressure-dividing high-pressure regulating angle valve, which comprises a valve body and an upper cover, wherein a valve core and a valve seat are arranged in the valve body, a first throttle plate and a second throttle plate are arranged in the valve seat, and a plurality of valve seat throttle windows are uniformly arranged on the upper part of the valve seat along the circumferential direction; the valve core is provided with a first throttling sleeve and a second throttling sleeve, the first throttling sleeve is positioned in the inner ring of the second throttling sleeve, the first throttling sleeve is provided with a plurality of uniformly distributed first kidney-shaped flow passage holes along the circumferential direction, the second throttling sleeve is provided with a plurality of uniformly distributed second kidney-shaped flow passage holes along the circumferential direction, the plurality of first kidney-shaped flow passage holes and the plurality of second kidney-shaped flow passage holes form a flow passage in a one-to-one correspondence mode, and the first throttling sleeve is provided with a plurality of rectangular flow adjusting windows along the circumferential direction. The structure is complex, the device can only be suitable for the working condition with less solid content, and when the solid content is larger, the device is easy to block, and the problem of local abrasion can not be solved.
The valve has the advantages that the problem of short service life caused by serious damage of the valve internals in the use process of the valve is solved, particularly, the deposition and blockage conditions of solid-containing media are easy to occur under the condition of small opening degree if the solid content of the media is high and the viscosity of the media is high, the research and the improvement of materials and structures are carried out, and the effective service life of the valve is prolonged, so that the valve is the key point for the attention and the research of technical personnel in the industry.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an active prevention and control failure type solid-containing multiphase flow control valve which is reasonable and practical in structure; the invention has extremely high operation flexibility, can delay the abrasion damage rate of the multiphase flow medium containing solids to the valve internal part, thereby actively reducing or even avoiding the deposition and blockage condition of the solid medium in the valve on the premise of ensuring the high service life of the valve internal part and realizing the active prevention and control effect on the failure problem of the valve.
In order to achieve the purpose, the invention adopts the following technical scheme:
an active prevention and control failure type solid-containing multiphase flow control valve comprises a valve body, wherein a valve cavity of the valve body forms an accommodating cavity for accommodating a valve core; the valve core and the valve seat are coaxial, the valve rod driven by the driving source drives the valve core to axially slide relative to the valve seat, and a sealing surface type relation is formed between the outer cylindrical surface of the valve body and the valve seat sleeve cavity; a runner groove which has the flow control function is arranged on the valve core; the valve cavity is provided with a medium inlet and a medium outlet which are communicated with the external environment in a penetrating way, so that the solid-containing multi-phase flow medium can enter the medium outlet through a flow passage formed by the runner groove after flowing in through the medium inlet; the method is characterized in that: the valve rod comprises an upper valve rod connected with the power end of the driving source and a lower valve rod directly and fixedly connected with the top end of the valve core, and the lower valve rod is coaxially and rotatably matched with the upper valve rod so that the lower valve rod can perform self-rotating action relative to the axis of the upper valve rod; the solid-containing multiphase flow control valve also comprises a driving part which uses flushing medium flow force and/or blowing medium wind force to push the lower valve rod and the valve core to generate self-rotation action.
Preferably, a through cavity channel coaxial with the valve core and used for the lower valve rod to be arranged is arranged at the outer wall of the valve body in a penetrating mode, and a flushing medium channel is arranged at the outer wall of the through cavity channel in a penetrating mode along the radial direction of the through cavity channel; the passing cavity is also provided with a sealing part for sealing a gap between the outer wall of the lower valve rod and the wall of the passing cavity hole, the outer wall of the lower valve rod is provided with a helical blade forming the driving part, the outlet of the flushing medium channel is positioned at the wall of the passing cavity hole between the sealing part and the helical blade, and the axial length between the helical blade and the outlet of the flushing medium channel is greater than or equal to the action stroke of the valve core.
Preferably, the axes of the valve rod, the valve core and the valve seat are arranged vertically, the medium inlet is positioned at one side of the valve body, and the medium outlet is positioned at the bottom end of the valve body; a lower guide sleeve with the functions of draining the flushing medium and guiding the lower valve rod is fixedly connected to the bottom port of the through cavity, and a communicating hole through which the flushing medium can enter the valve cavity from the through cavity is axially arranged on the lower guide sleeve in a penetrating manner.
Preferably, a through cavity channel coaxial with the valve core and used for the lower valve rod to be arranged is arranged at the outer wall of the valve body in a penetrating mode, and a flushing medium channel communicated with an external flushing medium to flow in is arranged along the radial direction of the through cavity channel in a penetrating mode; the passing cavity is also provided with a sealing part for sealing a gap between the outer wall of the lower valve rod and the wall of the hole of the passing cavity, the sealing part is positioned above the outlet of the flushing medium channel, and a lower guide sleeve with sealing and guiding functions is fixedly connected at the bottom port of the passing cavity; the valve core is in a two-section stepped shaft shape with a thick upper part and a thin lower part, the small-diameter section of the valve core is provided with the runner groove and forms cylindrical surface sealing fit with the valve seat, and a conical surface sealing fit relation is formed between a valve core shaft shoulder and a cylinder opening at the top end of the valve seat; the large-diameter section of the valve core is provided with an injection hole which is tangent or intersected with the outer edge of the valve core and forms the driving part, the outlet end of the injection hole is communicated with the valve cavity, and the inlet end of the injection hole is communicated with a first radial hole outlet at the valve core; the inlet of the first radial hole is communicated with the axial flow channel in the valve core, then extends into the lower valve rod along the axial direction of the valve core, and finally forms a communicating relation with the outlet of the second radial hole at the lower valve rod, and the inlet of the second radial hole is communicated to the passing cavity channel.
Preferably, the bottom end of the upper valve rod and the top end of the lower valve rod are coaxially and convexly provided with positioning convex rings, so that adjacent ends of the upper valve rod and the lower valve rod form a T-shaped head structure; the solid-containing multiphase flow control valve also comprises a half joint sleeve, wherein the radial clasping type hoop of the half joint sleeve is sleeved at a T-shaped head structure at the upper valve rod and a T-shaped head structure at the lower valve rod; and hole shoulders are arranged at two tube mouths of the half joint sleeve and used for limiting shaft shoulders at the corresponding T-shaped head structures.
Preferably, a compression spring is coaxially arranged between the T-shaped head structures.
Preferably, the solid-containing multiphase flow control valve also comprises a bottom flange matched with the lower opening of the valve body through a flange; the valve seat comprises an outer ring sleeve and an inner valve sleeve, wherein an annular fin is coaxially and convexly arranged on the outer wall of the outer ring sleeve, the annular fin is clamped by the valve body and the bottom flange in an opposite force application mode so as to position the position of the outer ring sleeve, an inner valve sleeve is coaxially arranged in the outer ring sleeve in a penetrating mode, and a sealing surface type axial sliding fit relation is formed between an upper section cylinder cavity of the inner valve sleeve and the valve core.
Preferably, the inner valve sleeve and the valve core are made of high-hardness stainless steel, or sprayed tungsten carbide, or infiltrated tungsten carbide, or solid tungsten carbide, or ceramic.
Preferably, the shape of the lower section cylinder cavity of the inner valve sleeve is a bell mouth-shaped structure with the aperture gradually increasing from top to bottom.
Preferably, the top end cylinder opening of the inner valve sleeve is coaxially and concavely provided with an annular step, and the height of the step surface of the annular step is higher than that of the top end of the runner groove when the valve core is at the lowest position.
Preferably, an axial communicating groove used for avoiding piston effect when the valve rod moves axially is arranged on the outer cylindrical surface of the half joint sleeve.
The invention has the beneficial effects that:
1) through the scheme, in the valve adjusting process, the solid-containing multiphase flow medium can normally enter along the medium inlet, and the valve rod drives the valve core to generate lifting opening and closing actions, so that the medium finally enters the medium outlet along the gradually opened flow channel groove at the valve core, and the aim of valve throttling control on the solid-containing multiphase flow medium is fulfilled. The valve core is characterized in that on one hand, the valve rod is split into the upper valve rod and the lower valve rod, so that the valve core can generate self-rotation action relative to the valve seat; on the other hand, the self-rotation action needs an external power source, the driving part is pushed to act by the flowing force of a flushing medium or the wind power of a sweeping medium until the valve core generates the self-rotation action, so that the valve core automatically rotates around the axis of the valve core due to the rotation structure of the lower valve rod, the flowing abrasion influence of the solid-containing multiphase flow medium is more uniform in the circumferential direction of the valve core and the valve seat, the abrasion degree of the solid-containing multiphase flow medium is effectively delayed, and the high service life of the valve internal part can be ensured.
Practice proves that compared with the solid-containing multiphase flow regulating valve in the prior art, under the condition of the same throttling area, the valve core has larger opening, is more beneficial to the passing of solid-containing multiphase flow media, is more beneficial to prolonging the actual service life of the valve, and is more beneficial to the smooth passing of solid-phase media due to the shape characteristic of the throttling area. Meanwhile, due to the self-rotation characteristic of the valve core, a certain stirring effect can be formed, the conditions of deposition, blockage and the like of the solid-containing multi-phase flow medium in the valve can be effectively reduced or even eliminated, and the solid-containing multi-phase flow medium can always smoothly pass through the invention and is discharged to a specified external device; even if solid particles in the solid-containing multiphase flow medium are large or too many, the fluid environment can be effectively improved through the stirring and even crushing action, and the working reliability and the stability of the fluid environment can be obviously improved.
2) The flushing medium is regarded as a water body, and the lower valve rod and the valve core are regarded as water wheels, so that the water body can drive the water wheels to rotate, and the water body can be driven by helical blades, helical grooves or hydraulic jet. Specifically, the present invention provides two driving modes of the helical blade and the injection hole, wherein:
when the invention is driven by a helical blade, the helical blade can be arranged on the flow path of the flushing medium, i.e. below the outlet of the flushing medium channel in the through-channel. Therefore, after the flushing medium enters the through cavity channel through the flushing medium channel, the flushing medium descends and provides fluid pressure for the helical blade, so that the helical blade actively drives the lower valve rod and the valve core to perform self-rotation action. When the rotation amplitude of the valve core needs to be controlled every time, only the inrush quantity or inrush time of the flushing medium needs to be controlled, and the active prevention and control effect is excellent.
When the jet hole is adopted for driving, the upper end and the lower end of the through cavity channel are respectively sealed by the sealing part and the lower guide sleeve, so that once a flushing medium enters the through cavity channel along the flushing medium channel, the flushing medium only can sequentially pass through the second radial hole, the axial flow channel and the first radial hole and finally is jetted out from the jet hole, and then the valve core is driven to perform self-rotation action. Similarly, the structure only needs to control the inrush quantity or inrush time of the flushing medium when the rotation amplitude of the valve core needs to be controlled every time; even if necessary, the flushing medium can be fluid, and can also be changed into a blowing medium taking wind power as driving force or other medium sources capable of generating thrust, so that the active prevention and control effect can be effectively ensured.
3) The swivel structure, particularly to the valve stem itself, may be achieved by a variety of configurations, such as arranging a swivel bearing on the lower or upper valve stem to mate with another valve stem, and the like. Or as for the invention, on the basis of designing the adjacent ends of the lower valve rod and the upper valve rod as T-shaped head structures, the radial cohesion of the half joint sleeves is adopted, so that the upper valve rod and the lower valve rod are limited not to generate overlarge cross motion in the axial direction; on the other hand, the lower valve rod can be ensured to have enough action clearance to generate the self-rotation function. The arrangement of the compression spring is used for eliminating the axial clearance and ensuring the reliable control effect of the upper valve rod on the lower valve rod.
4) The valve seat adopts an inner-outer double-layer nested structure, so that the inner valve sleeve can be made of high-hardness stainless steel or solid tungsten carbide and the like with better materials, and the valve core can be made of the same material; therefore, on the premise of saving the production cost as much as possible, the flow abrasion resistance of the throttling element against the solid-containing multiphase flow medium is improved, and the stable operation life of the invention is prolonged.
5) The medium outlet adopts a gradually-expanding structure, namely a bell mouth structure, so that the outlet speed of the medium can be reduced, and the influence degree of the solid-containing multiphase flow medium on the scouring abrasion of downstream pipelines or equipment is effectively reduced.
6) An annular step is arranged at the cylindrical opening at the top end of the inner valve sleeve, and a conical surface required by sealing and matching of the conical surface is formed at the vertical step surface of the annular step; that is, when the invention is opened, the minimum throttle area of the valve flow passage is formed at the matching part of the annular step and the valve core, so that the throttle surface can be separated from the sealing surface, the scouring abrasion of the solid multiphase flow medium to the sealing surface of the valve can be further effectively slowed down, and the service life of the control valve can be prolonged.
Drawings
FIGS. 1 and 2 are cross-sectional views of an operation structure according to an embodiment of the present invention;
FIG. 3 is an enlarged view of a portion I of FIG. 1;
FIG. 4 is a partial enlarged view of portion II of FIG. 2;
FIG. 5 and FIG. 6 are cross-sectional views of an operation structure of another embodiment of the present invention;
FIG. 7 is a perspective view of one embodiment of the valve cartridge of the configuration shown in FIG. 5;
FIG. 8 is a front view of FIG. 7;
FIG. 9 is an isometric enlarged view taken in cross-section along line A-A of FIG. 8;
FIG. 10 is a schematic perspective view of another embodiment of a valve cartridge of the configuration shown in FIG. 5;
FIG. 11 is a schematic cross-sectional view of FIG. 10;
fig. 12 is an isometric enlarged view of the cross-sectional view of fig. 11 taken along line B-B.
10-valve body 10 a-passage channel 10 b-flushing medium channel
11-medium inlet 12-medium outlet
20-valve core 21-runner groove
30-valve seat 31-outer ring sleeve 31 a-annular fin 32-inner valve sleeve 32 a-annular step
40-driving source
51-upper valve rod 52-lower valve rod 53-T-shaped head structure 54-half joint sleeve
60-seal part 70-lower guide sleeve 71-communication hole
81-drive 82-first radial bore 83-axial flow passage 84-second radial bore
90-bottom flange
Detailed Description
For ease of understanding, the specific construction and operation of the invention is described further herein as follows:
the specific implementation structure of the present invention can be seen with reference to fig. 1-6, and the main structure thereof includes a driving source 40, a valve cover, a valve rod, a valve core 20, a valve seat 30, a valve body 10 and a bottom flange 90, which are sequentially arranged from top to bottom along a vertical direction; to avoid ambiguity, the arrows in the figure illustrate that: the flow direction of the solid-containing multiphase flow medium is left in and down out, and the flow direction of the flushing medium or the sweeping medium is right in and down out. As shown in fig. 1-4, the valve rod is subdivided into an upper valve rod 51 and a lower valve rod 52, the upper valve rod 51 and the lower valve rod 52 realize a rotation fit relationship therebetween through a hoop function of a hough joint sleeve 54 shown in fig. 4 relative to a T-shaped head structure 53, and the lower valve rod 52 is directly fixed to the valve element 20, so that the valve element 20 can freely rotate around the axis of the valve rod. The small diameter section of the valve core 20 and the valve seat 30 are in cylindrical surface sealing fit, and in actual operation, the flow channel grooves 21 are arranged on the lower side of the valve core 20, and the sectional area of each flow channel groove 21 is gradually enlarged along the flowing direction of the medium, so that the functions of throttling and opening and closing control of the solid multiphase flow medium can be realized.
In order to realize the active prevention and control effect of the valve, on the basis of the structure that the valve core 20 can rotate automatically, the valve body 10 is provided with a through cavity 10a through which the valve rod can pass, one side of the through cavity 10a is provided with a flushing medium channel 10b shown in fig. 1-2 and fig. 5-6, and the sealing part 60 is used for forcing the flushing medium to move downwards so as to finally ensure the active pushing function of the valve rod and/or the valve core 20. More specifically, the active pushing action can be realized by the following two embodiments:
firstly, as shown in fig. 1-4, a helical blade is arranged on the lower valve rod 52 positioned in the through channel 10a, so that the hydrodynamic force of the flushing medium is converted into the driving force of the helical blade, and finally the helical blade is driven by the flushing medium to achieve the active rotation effect of the lower valve rod 52 and even the valve core 20; when the solid-containing multiphase flow medium flows through the throttling surface of the valve core 20 and the valve seat 30, the solid-containing multiphase flow medium uniformly swirls around the axis along with the rotation of the valve core 20, and the scouring and abrasion of the throttling part are more uniform. At this time, the lower guide sleeve 70 functions as a simple beam type valve stem support together with the seal portion 60, and the communicating hole 71 is formed in the lower guide sleeve 70, thereby achieving the purpose of flowing the flushing medium from the through channel 10a into the valve chamber. When the flushing medium enters the valve cavity, the function of flushing the valve cavity can be continuously achieved, and the condition that the solid-containing multiphase flow medium is deposited and blocked in the valve cavity can be further improved and even avoided.
Second, injection holes may be arranged at the valve core 20 as shown in fig. 7-12 by arranging a second radial hole 84 in the lower stem 52 as shown in fig. 5-12, and the injection holes communicate with the second radial hole 84 sequentially through the first radial hole 82 and the axial flow passage 83. At this time, the lower guide sleeve 70 also functions as a simply supported stem together with the seal 60; on the other hand, the above-mentioned function is no longer performed, but the effect of completely or incompletely sealing and blocking the bottom port of the through channel 10a should be performed, so as to ensure that the flushing medium can directly and sequentially flow along the second radial hole 84, the axial flow channel 83, and the first radial hole 82, and finally be ejected along the ejection hole serving as the driving portion 81, so as to drive the valve element 20 to perform the self-rotation action.
Of course, the valve core 20 may also be a conventional sleeve-type valve core 20, that is, a flow window is opened on the external side of the cylindrical sleeve; compared with a plunger type valve core 20 of a Global control valve, under the same throttle area condition, the throttle area shape of the conventional sleeve type valve core 20 has small dimensional difference in all directions, the solid medium passing performance is good, and the valve core 20 is continuously rotated and stirred, so that the situations of sedimentation, blockage and the like are also difficult to occur. In the structure shown in fig. 10-12, the valve core 20 is a multi-stage throttling type valve core 20, and the valve seat 30 and/or the guide sleeve of the valve core 20 are multi-stage throttling sleeves. Two flow channel grooves 21 are arranged at the first-stage throttling position of the valve core 20, and the sectional areas of the flow channel grooves 21 are gradually enlarged along the medium flowing direction; two runner grooves 21 are arranged at the second-stage throttling part, the shape and the size of the runner grooves 21 are the same as those of the first stage, but the distribution positions are staggered by 90 degrees around the axis of the first stage; the third-stage throttling part is provided with four runner grooves 21, the shape and the size of the runner grooves 21 are the same as those of the first two stages, but the distribution positions of the runner grooves and the axes of the first two stages are staggered by 45 degrees. When the multi-stage throttling valve core 20 is adopted, the working condition of the high-pressure-difference solid-containing multi-phase flow medium can be better adapted, and the phenomena of flash evaporation cavitation damage and the like are effectively reduced; and because the valve core 20 freely rotates, the stirring effect is certain, and the phenomena of silting and blocking of solid-containing media in the multi-stage throttling process can be effectively prevented. In order to further improve the stirring and cleaning effect inside the multistage throttling sleeve, even the jet orifice can be arranged inside the multistage guide sleeve, so that the flushing medium is introduced into the jet orifice, and the inside of the multistage throttling sleeve is stirred and cleaned by using the jet fluid, thereby effectively preventing the solid-containing medium from silting and blocking inside. In the structure shown in fig. 1 and 3, an annular step 32a is further provided at the top end of the inner valve sleeve 32 constituting the valve seat 30; that is, when the present invention is opened, the minimum throttle area of the valve flow passage occurs at the position where the annular step 32a is matched with the valve core 20 as shown in fig. 3, so that the scouring abrasion of the solid multiphase flow medium on the valve sealing surface can be further effectively reduced, and the service life of the present invention can be prolonged. As can be seen in fig. 3, the vertical step surface of the annular step 32a forms the tapered surface required for the above-described tapered surface sealing engagement.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, such as the conventional shape change of the helical blade, the conventional change of the number of the injection holes or the arrangement angle at the valve core 20, even the flushing medium is replaced by other power source such as wind energy, etc., and such conventional technical extensions on the basis of the above structures should be covered by the scope of the claims of the present invention.
Claims (10)
1. The active prevention and control failure type solid-containing multiphase flow control valve comprises a valve body (10), wherein a valve cavity of the valve body (10) forms an accommodating cavity for accommodating a valve core (20); a valve seat (30) is arranged in the valve cavity, the valve core (20) and the valve seat (30) are coaxial, the valve core (20) is driven to axially slide relative to the valve seat (30) by a valve rod driven by a driving source (40), and a sealing surface type relation is formed between the outer cylindrical surface of the valve core (20) and the sleeve cavity of the valve seat (30); a runner groove (21) which plays a role in flow control is formed in the valve core (20); the valve cavity is provided with a medium inlet (11) and a medium outlet (12) which are communicated with the external environment in a penetrating way, so that the solid-containing multiphase flow medium can enter the medium outlet (12) through a flow passage formed by the runner groove (21) after rushing in through the medium inlet (11); the method is characterized in that: the valve rod comprises an upper valve rod (51) connected with the power end of the driving source (40) and a lower valve rod (52) directly fixedly connected with the top end of the valve core (20), and the lower valve rod (52) is coaxially and rotatably matched on the upper valve rod (51) so that the lower valve rod (52) can generate self-rotating motion relative to the axis of the upper valve rod (51); the solid-containing multiphase flow control valve also comprises a driving part (81) which drives the lower valve rod (52) and the valve core (20) to generate self-rotation action by using flushing medium flow force and/or purging medium wind force.
2. The active failure-prevention and control type solid-containing multiphase flow control valve as claimed in claim 1, wherein: a passing cavity channel (10a) which is coaxial with the valve core (20) and is used for arranging the lower valve rod (52) penetrates through the outer wall of the valve body (10), and a flushing medium channel (10b) penetrates through the outer wall of the passing cavity channel (10a) along the radial direction of the passing cavity channel (10 a); the position of the passing cavity (10a) is also provided with a sealing part (60) for sealing a gap between the outer wall of the lower valve rod (52) and the hole wall of the passing cavity (10a), the outer wall of the lower valve rod (52) is provided with a helical blade forming the driving part, the outlet of the flushing medium channel (10b) is positioned at the position of the hole wall of the passing cavity (10a) between the sealing part (60) and the helical blade, and the axial length between the helical blade and the outlet of the flushing medium channel (10b) is greater than or equal to the action stroke of the valve core (20).
3. The active failure prevention and control type solid-containing multiphase flow control valve according to claim 2, wherein: the valve rod, the valve core (20) and the valve seat (30) are arranged in a vertical mode, the medium inlet (11) is located at one side of the valve body (10), and the medium outlet (12) is located at the bottom end of the valve body (10); a lower guide sleeve (70) which has the functions of guiding the flushing medium and guiding the lower valve rod (52) is fixedly connected to the bottom port of the through cavity (10a), and a communication hole (71) through which the flushing medium can enter the valve cavity from the through cavity (10a) is axially arranged on the lower guide sleeve (70).
4. The active failure-prevention and control type solid-containing multiphase flow control valve as claimed in claim 1, wherein: a through cavity channel (10a) coaxial with the valve core (20) and allowing the lower valve rod (52) to be arranged is arranged on the outer wall of the valve body (10) in a penetrating mode, and a flushing medium channel (10b) allowing external flushing media to flow into is arranged along the radial direction of the through cavity channel (10a) in a penetrating mode; a sealing part (60) for sealing a gap between the outer wall of the lower valve rod (52) and the hole wall of the passing cavity (10a) is further arranged at the passing cavity (10a), the sealing part (60) is positioned above the outlet of the flushing medium channel (10b), and a lower guide sleeve (70) with sealing and guiding functions is fixedly connected at the bottom port of the passing cavity (10 a); the valve core (20) is in a two-section stepped shaft shape with a thick upper part and a thin lower part, the small-diameter section of the valve core (20) is provided with the runner groove (21) and forms cylindrical surface sealing fit with the valve seat (30), and a conical surface sealing fit relation is formed between the shaft shoulder of the valve core (20) and the cylinder opening at the top end of the valve seat (30); the large-diameter section of the valve core (20) is provided with an injection hole which is tangent to or intersected with the outer edge of the valve core to form the driving part (81), the outlet end of the injection hole is communicated with the valve cavity, and the inlet end of the injection hole is communicated with the outlet of a first radial hole (82) at the valve core (20); after the inlet of the first radial hole (82) is communicated with an axial flow channel (83) in the valve core (20), the first radial hole extends into the lower valve rod (52) along the axial direction of the valve core (20), and finally forms a communication relation with the outlet of a second radial hole (84) at the lower valve rod (52), and the inlet of the second radial hole (84) is communicated to the passing cavity channel (10 a).
5. The active control failure type solid-laden multiphase flow control valve according to claim 1, 2, 3 or 4, wherein: the bottom end of the upper valve rod (51) and the top end of the lower valve rod (52) are coaxially and convexly provided with positioning convex rings, so that adjacent ends of the upper valve rod (51) and the lower valve rod (52) form T-shaped head structures (53); the solid-containing multiphase flow control valve also comprises a half joint sleeve (54), wherein the hoop sleeve of the half joint sleeve (54) in a radial locking manner is sleeved at a T-shaped head structure at the upper valve rod (51) and a T-shaped head structure at the lower valve rod (52); two cylinder openings of the half joint sleeve (54) are uniformly provided with hole shoulders for limiting shaft shoulders at the corresponding T-shaped head structure (53).
6. The active control failure type solid-laden multiphase flow control valve according to claim 1, 2, 3 or 4, wherein: the solid-containing multiphase flow control valve also comprises a bottom flange (90) which is in flange fit with the lower opening of the valve body (10); the valve seat (30) comprises an outer ring sleeve (31) and an inner valve sleeve (32), an annular fin (31a) is coaxially and convexly arranged at the outer wall of the outer ring sleeve (31), the valve body (10) and the bottom flange (90) are used for applying force in opposite directions to clamp the annular fin (31a) so as to position the position of the outer ring sleeve (31), the inner valve sleeve (32) coaxially penetrates through the inner ring sleeve (31), and a sealing surface type axial sliding fit relation is formed between an upper section cylinder cavity of the inner valve sleeve (32) and the valve core (20).
7. The active failure-prevention and control type solid-containing multiphase flow control valve as claimed in claim 6, wherein: the inner valve sleeve (32) and the valve core (20) are made of high-hardness stainless steel, sprayed tungsten carbide, infiltrated tungsten carbide, solid tungsten carbide or ceramic.
8. The active failure-prevention and control type solid-containing multiphase flow control valve as claimed in claim 6, wherein: the shape of the lower section cylinder cavity of the inner valve sleeve (32) is a horn mouth-shaped structure with the aperture gradually increasing from top to bottom.
9. The active failure-prevention and control type solid-containing multiphase flow control valve as claimed in claim 6, wherein: an annular step (32a) is coaxially and concavely arranged at the top end tube opening of the inner valve sleeve (32), and the height of the step surface of the annular step (32a) is higher than that of the top end of the runner groove (21) when the valve core (20) is at the lowest position.
10. The active failure-prevention and control type solid-containing multiphase flow control valve as claimed in claim 5, wherein: an axial communicating groove for avoiding piston effect when the valve rod moves axially is arranged on the outer cylindrical surface of the half joint sleeve (54).
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| CN202010190555.2A CN111442113B (en) | 2020-03-18 | 2020-03-18 | Active prevention and control failure type solid-containing multiphase flow control valve |
| CN202210171288.3A CN114635983B (en) | 2020-03-18 | 2020-03-18 | Fluid-driven valve core rotary multiphase flow control valve |
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| CN202010190555.2A CN111442113B (en) | 2020-03-18 | 2020-03-18 | Active prevention and control failure type solid-containing multiphase flow control valve |
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| CN202210171288.3A Division CN114635983B (en) | 2020-03-18 | 2020-03-18 | Fluid-driven valve core rotary multiphase flow control valve |
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| CN202210171288.3A Active CN114635983B (en) | 2020-03-18 | 2020-03-18 | Fluid-driven valve core rotary multiphase flow control valve |
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| CN113339513A (en) * | 2021-05-24 | 2021-09-03 | 浙江永盛科技股份有限公司 | Self-cleaning kettle bottom valve |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN114635983A (en) | 2022-06-17 |
| CN111442113B (en) | 2022-04-22 |
| CN114635983B (en) | 2023-12-12 |
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