CN105485419A - Anti-scouring control valve - Google Patents

Anti-scouring control valve Download PDF

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Publication number
CN105485419A
CN105485419A CN201510990163.3A CN201510990163A CN105485419A CN 105485419 A CN105485419 A CN 105485419A CN 201510990163 A CN201510990163 A CN 201510990163A CN 105485419 A CN105485419 A CN 105485419A
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CN
China
Prior art keywords
valve
seat
control valve
coal
erosion
Prior art date
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CN201510990163.3A
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Chinese (zh)
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CN105485419B (en
Inventor
马玉山
李虎生
常占东
张耀华
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吴忠仪表有限责任公司
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Publication of CN105485419A publication Critical patent/CN105485419A/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K47/00Means in valves for absorbing fluid energy, e.g. cushioning of opening or closure movement, eliminating of vibrations of the valve member

Abstract

The invention relates to an anti-scouring control valve which comprises a valve element (1) and a valve seat (2). The anti-scouring control valve is characterized in that a flow guide seat (3) is installed in a medium runner at the bottom of the valve seat (2) and at least two throttling pieces (4) are installed at the bottom of the flow guide seat (3). In order to prevent vortexes from being generated at the lower end of the valve seat through coal-oil slurry and prevent the lower end of the valve seat from being scoured by the coal-oil slurry, the vortex flow guide seat is arranged on the lower face of the valve seat in the control valve, when the high-speed coal-oil slurry flows to the upper end face of the flow guide seat, due to the fact that the upper end face is designed to be a conic face and is evenly divided into four parts through flow guide wings, the flow direction of the coal-oil slurry is rapidly changed, an included angle formed between the coal-oil slurry and the conic face is 45 degrees, and the coal-oil slurry flows through the flow guide seat into the throttling pieces; and meanwhile due to the structural design of the flow guide wings, the coal-oil slurry can be effectively prevented from generating the vortexes in a valve cavity.

Description

A kind of control valve of protection against erosion
Technical field
The present invention relates to a kind of control valve of protection against erosion.
Background technique
Being currently used in coal pump minimum discharge regulates the spool valve seat of the modulating valve employing of operating mode to be parabola single seat spool and Venturi tube structure valve seat, the spool valve seat of this structure can realize featuring rigid cutting-off and the adjusting function of working condition requirement at short notice, but under 24MPa pressure reduction, working life is short, valve body lumen is easily caused easily to block, continuous use a period of time spool figure and sealing pair wash away seriously, leak and cause realizing pressurize, lose regulating action.Even after valve seat washes away, directly wash away valve body, as can not Timeliness coverage, will leak outside, cause coal hydrogen-generator to stop.
Summary of the invention
The object of this invention is to provide a kind of control valve of protection against erosion, significantly can improve the defect that spool valve seat is washed, working life is short of control valve under High Pressure Difference coal operating mode, and avoid anchor ring between spool and valve seat and amass easy blockage problem, can also prevent coal from producing eddy current at control valve valve pocket, effectively control the flow velocity of coal in control valve outlet port.
A control valve for protection against erosion, comprises spool and valve seat, and its specialization is: in the medium runner of described seat bottom portion, be provided with diversion seat, and be provided with at least two throttling elements bottom this diversion seat.
Wherein diversion seat comprises cross frame, and four right angle joint on this cross frame are equipped with flap, and this flap is conical surface with the surface of medium contact.
Wherein throttling element comprises annulus, and the inwall of this annulus is provided with 4 through holes, and on annulus outer wall, be provided with 4 boss.
Wherein the material of diversion seat and throttling element all adopts widia.
Wherein on described valve seat, have the linear window of Unsymmetrical Parabolic, described spool is made up of sealed base, axostylus axostyle and transmission cuboid from the bottom to top successively, has the flow breach of 90 ° of angles in the side of sealing base.
Wherein be provided with acute angle blade in the flow indentation, there of sealed base.
Wherein spool adopts diamondite material.
Wherein the change of the linear window area of Unsymmetrical Parabolic meets equal percentage characteristics curve with valve opening increase.
Wherein the linear window of Unsymmetrical Parabolic is that Unsymmetrical Parabolic is linear, and the angle between this Unsymmetrical Parabolic linear window left and right circular arc and valve seat axle center is 100 °.
In control valve of the present invention, valve core structure adopts 90 ° of V-arrangement wedge-shaped working edge designs, facilitates scavenging valve seating face attachment.Valve seat adopts the linear window design of Unsymmetrical Parabolic, realizes small flow Long Distances and regulates.Through probationary certificate, efficiently solve coal washing away spool valve base sealing pair, in addition because identical orifice size concentrates on the valve seat only having 90 ° of angles, thus avoid anchor ring between venturi single-seat angle valve spool and valve seat and amass easy blockage problem.
In addition in order to prevent coal from being washed away by coal at valve seat lower end generation eddy current and valve seat underpart, below valve seat, turbo type diversion seat is designed in control valve of the present invention, when high speed coal flows to diversion seat upper-end surface, because this place is designed to conical surface, and the diversed wing is divided into four parts, coal will change the flow direction rapidly, angle at 45 ° with cone-shaped, flow through diversion seat and enter throttling element, simultaneously due to flap structural design, can effectively prevent coal from producing eddy current at valve pocket.In order to reduce the flow velocity of coal in control valve outlet port, opposite-flushing type throttling element is have also been devised in order to change the flow direction of coal in control valve of the present invention, coal is being liquidated mutually by throttling element four holes circumferentially, consume the kinetic energy of coal, reduce the flow velocity at control valve valve outlet port place, after two-stage throttling element and diversion seat, the flow velocity of coal can control safety flow velocity (10m/s) below.
Accompanying drawing explanation
Accompanying drawing 1 is structural representation of the present invention;
Accompanying drawing 2 is the structural representation of diversion seat 3 in the present invention;
Accompanying drawing 3 is the structural representation of throttling element 4 in the present invention.
Accompanying drawing 4 is the structural representation of valve seat 2 in the present invention;
Accompanying drawing 5 is the sectional view of valve seat 2 in the present invention;
Accompanying drawing 6 is the structural representation of spool 1 in the present invention;
Accompanying drawing 7 is the left view of spool 1 in the present invention.
Embodiment
As shown in Figure 1, 2, 3, the invention provides a kind of new oil coal slurry pump control valve, comprise spool 1 and valve seat 2, in the medium runner bottom described valve seat 2, diversion seat 3 is installed, and bottom this diversion seat 3, two throttling elements 4 is installed.Wherein diversion seat 3 comprises cross frame, and four right angle joint on this cross frame are equipped with flap 5, and this flap 5 is conical surface with the surface of medium contact, is pressed abd fixed in valve body between throttling element 4 and valve seat 2 by diversion seat 3.
Wherein throttling element 4 comprises annulus, the inwall of this annulus is provided with four through holes 6 (distributing symmetrically and evenly), and on annulus outer wall, be provided with four boss 7 (distribute symmetrically and evenly, Main Function allows homogeneous media by throttling element, the washing away throttling element caused when preventing media flow direction from changing).
Using method of the present invention and working principle are:
When flowing to diversion seat 3 upper-end surface in valve seat 2 when high speed coal, because this place (four flap 5 surfaces) is all designed to conical surface, and the diversed wing 5 is divided into four parts, coal will change the flow direction rapidly, angle at 45 ° with cone-shaped, thus flow through diversion seat 3 and enter throttling element 4, simultaneously due to the structural design of flap 5, can effectively prevent coal from producing eddy current at valve pocket.After entering throttling element 4, the flow direction of coal can be changed owing to adopting opposite-flushing type throttling element of the present invention, coal is being liquidated mutually by four holes on throttling element 4 annulus, consume the kinetic energy of coal, reduce the flow velocity at control valve valve outlet port place, through probationary certificate, after two-stage throttling element 4 with diversion seat 3, the flow velocity of coal can control safety flow velocity (10m/s) below.Diversion seat in the present invention and throttling element material adopt widia, and diversion seat adopts turbotype structure design, and throttling element adopts opposite-flushing type sleeve design, realizes successively decreasing of flow velocity.
As shown in FIG. 4,5,6, 7, the invention provides a kind of control valve of protection against erosion, comprise the spool 1 and valve seat 2 that are coordinated by angle of rotation stroke action, and both face contacts, described valve seat 2 has the linear window 8 of Unsymmetrical Parabolic as flow window, the change of its area becomes approximate equal percentage characteristics curve with valve opening increase, described spool 1 shape is made up of columned sealed base, axostylus axostyle and transmission cuboid, sealed base bottom has the flow breach 9 of 90 ° of angles, and it is linked into an integrated entity by columniform axostylus axostyle and transmission cuboid.
Wherein flow breach 9 place (with sealing surface contact position on valve seat 2) of the 90 ° of angles in back cover seat bottom that spool 1 is close is provided with acute angle blade, this blade can effectively strike off the coal being bonded at valve seat 2 upper surface, and sealed base and axostylus axostyle and transmission cuboid are formed by whole tungsten carbide alloy compacting sintering.The flow window of valve seat 2 is that Unsymmetrical Parabolic is linear, and the angle between this window left and right circular arc and axle center is 100 °, is the dynamic Contact between face and face between valve seat 2 top and spool 1 bottom, the pin-and-hole on valve seat 2 be used to sleeve location.
Using method of the present invention and working principle are:
Problem is washed away by high pressure high flow rate coal in order to solve ARC coal angle type control valve spool 1 valve seat 2, modulating valve of the present invention is designed to angle of rotation stroke action mode, valve seat 2 is designed to asymmetric equal percentage curve shape window, function mainly realizes small flow Long Distances and regulates, if adopt venturi single-seat angle valve structural design, the small annular gap formed between spool 1 and valve seat 2 particularly only has 1mm even less under small guide vane, coal is easily caused to be gathered in body cavity, and adopt the valve seat 2 of new structure and the angle valve of spool 1 structure, then effectively can prevent the generation of this problem, because the flow window minimum dimension formed between spool 1 and valve seat 2 is all at more than 2mm, spool 1 is designed to be designed to acute angle with valve seat 2 contacting point and lower end surface, 90 ° of V-notch places, being designed to 90 ° of breach objects is herein satisfied 90 ° of rotating distance requirements, it is remove the coal being attached to valve seat 2 upper surface at any time that lower end is designed to acute angle blade object, the seal failure preventing from coal from entering valve seat 2 and spool 1 surface of contact causing.

Claims (9)

1. the control valve of a protection against erosion, comprise spool (1) and valve seat (2), it is characterized in that: in the medium runner of described valve seat (2) bottom, diversion seat (3) is installed, and in this diversion seat (3) bottom, at least two throttling elements (4) are installed.
2. the control valve of a kind of protection against erosion as claimed in claim 1, it is characterized in that: wherein diversion seat (3) comprises cross frame, four right angle joint on this cross frame are equipped with flap (5), and this flap (5) surface that is upper and medium contact is conical surface.
3. the control valve of a kind of protection against erosion as claimed in claim 1, it is characterized in that: wherein throttling element (4) comprises annulus, the inwall of this annulus is provided with 4 through holes (6), and on annulus outer wall, is provided with 4 boss (7).
4. the control valve of a kind of protection against erosion as claimed in claim 1, is characterized in that: wherein the material of diversion seat and throttling element all adopts widia.
5. the control valve of a kind of protection against erosion as claimed in claim 1, it is characterized in that: wherein on described valve seat (2), have the linear window of Unsymmetrical Parabolic (8), described spool (1) is made up of sealed base, axostylus axostyle and transmission cuboid from the bottom to top successively, has the flow breach (9) of 90 ° of angles in the side of sealing base.
6. the control valve of a kind of protection against erosion as claimed in claim 5, is characterized in that: be wherein provided with acute angle blade at flow breach (9) place of sealed base.
7. the control valve of a kind of protection against erosion as claimed in claim 5, is characterized in that: wherein spool (1) adopts diamondite material.
8. as the control valve of a kind of protection against erosion in claim 5 to 7 as described in any one, it is characterized in that: wherein the change of the linear window of Unsymmetrical Parabolic (8) area meets equal percentage characteristics curve with valve opening increase.
9. as the control valve of a kind of protection against erosion in claim 5 to 7 as described in any one, it is characterized in that: wherein the linear window of Unsymmetrical Parabolic (8) is linear in Unsymmetrical Parabolic, and the angle between the linear window of this Unsymmetrical Parabolic (8) left and right circular arc and valve seat (2) axle center is 100 °.
CN201510990163.3A 2015-12-25 2015-12-25 A kind of control valve of protection against erosion Active CN105485419B (en)

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Application Number Priority Date Filing Date Title
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CN105485419A true CN105485419A (en) 2016-04-13
CN105485419B CN105485419B (en) 2018-03-30

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4413646A (en) * 1981-05-01 1983-11-08 Exxon Research And Engineering Co. Streamline coal slurry letdown valve
CN201651343U (en) * 2010-05-07 2010-11-24 上海开维喜阀门集团有限公司 Black water regulating valve
CN102767631A (en) * 2011-05-05 2012-11-07 上海威含德石油机械设备有限公司 Orifice-plate type adjustable throttle valve and manufacturing method thereof
CN102913635A (en) * 2012-11-01 2013-02-06 京东大型阀门有限公司 Valve clack, valve core and opening-closing valve
CN204459179U (en) * 2015-01-09 2015-07-08 芜湖市金贸流体科技股份有限公司 A kind of venturi angle type control valve
CN205446913U (en) * 2015-12-25 2016-08-10 吴忠仪表有限责任公司 Control valve

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4413646A (en) * 1981-05-01 1983-11-08 Exxon Research And Engineering Co. Streamline coal slurry letdown valve
CN201651343U (en) * 2010-05-07 2010-11-24 上海开维喜阀门集团有限公司 Black water regulating valve
CN102767631A (en) * 2011-05-05 2012-11-07 上海威含德石油机械设备有限公司 Orifice-plate type adjustable throttle valve and manufacturing method thereof
CN102913635A (en) * 2012-11-01 2013-02-06 京东大型阀门有限公司 Valve clack, valve core and opening-closing valve
CN204459179U (en) * 2015-01-09 2015-07-08 芜湖市金贸流体科技股份有限公司 A kind of venturi angle type control valve
CN205446913U (en) * 2015-12-25 2016-08-10 吴忠仪表有限责任公司 Control valve

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