CN116498765A - Combined valve core assembly with double-degree-of-freedom control, sleeve control valve and method thereof - Google Patents

Combined valve core assembly with double-degree-of-freedom control, sleeve control valve and method thereof Download PDF

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Publication number
CN116498765A
CN116498765A CN202310406194.4A CN202310406194A CN116498765A CN 116498765 A CN116498765 A CN 116498765A CN 202310406194 A CN202310406194 A CN 202310406194A CN 116498765 A CN116498765 A CN 116498765A
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CN
China
Prior art keywords
valve
sleeve
inner sleeve
rod
rotary rod
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310406194.4A
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Chinese (zh)
Inventor
钱锦远
罗宇轩
周兆年
金志江
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Zhejiang University ZJU
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Zhejiang University ZJU
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Priority to CN202310406194.4A priority Critical patent/CN116498765A/en
Publication of CN116498765A publication Critical patent/CN116498765A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/22—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution
    • F16K3/24—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members
    • F16K3/26—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members with fluid passages in the valve member
    • F16K3/267—Combination of a sliding valve and a lift valve
    • 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
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/04—Construction of housing; Use of materials therefor of sliding valves
    • F16K27/041—Construction of housing; Use of materials therefor of sliding valves cylindrical slide valves
    • 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
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/06—Construction of housing; Use of materials therefor of taps or cocks
    • F16K27/065—Construction of housing; Use of materials therefor of taps or cocks with cylindrical plugs
    • 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
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/30—Details
    • 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
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/30—Details
    • F16K3/314—Forms or constructions of slides; Attachment of the slide to the spindle
    • 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
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/30—Details
    • F16K3/32—Means for additional adjustment of the rate of flow
    • 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
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • F16K31/53—Mechanical actuating means with toothed gearing
    • F16K31/535—Mechanical actuating means with toothed gearing for rotating valves
    • 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
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0025—Electrical or magnetic means
    • F16K37/0041—Electrical or magnetic means for measuring valve parameters
    • 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
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/04—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having cylindrical surfaces; Packings therefor
    • F16K5/0442—Spindles and actuating means
    • 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
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/08—Details
    • 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
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/08—Details
    • F16K5/10—Means for additional adjustment of the rate of flow
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lift Valve (AREA)

Abstract

The invention discloses a combined valve core assembly with double-degree-of-freedom control, a sleeve control valve and a method thereof, and relates to the field of control valves. The combined valve core assembly consists of an inner sleeve, an outer sleeve, a valve plug, a sleeve rotating rod and a valve rod. The sleeve control valve consists of a combined valve core assembly, a valve body, a valve cover, a valve seat, a packing gland and an actuating mechanism. The valve plug is connected with the valve rod, and the valve rod drives the valve plug to move up and down in the inner sleeve. The inner sleeve is provided with an inner gear, the sleeve rotating rod is provided with an outer gear, the inner sleeve is meshed with the gear of the sleeve rotating rod, and the sleeve rotating rod rotationally drives the inner sleeve to rotationally move in the outer sleeve. The outer sleeve and the inner sleeve are provided with throttle windows, and fluid is allowed to flow out through the throttle windows. The two degrees of freedom control of the fluid is realized through the rotating position of the inner sleeve and the displacement position of the valve plug. The structure provided by the invention can improve the adjusting precision and the maximum adjustable ratio of the control valve.

Description

Combined valve core assembly with double-degree-of-freedom control, sleeve control valve and method thereof
Technical Field
The invention relates to the field of control valves, in particular to a combined valve core assembly with double-degree-of-freedom control, a sleeve control valve and a method thereof.
Background
The control valve is a component which controls the opening of the valve core through an actuating mechanism to keep the process parameters such as fluid pressure, temperature, speed, flow and the like in a proper operation range. Along with the increasing demands of industrial application, the control valve needs to be applied to complex extreme working conditions such as high temperature, high pressure, large flow, high pressure difference and the like, and the demands of industries such as nuclear power, chemical industry, military and the like on the control valve with large adjustable ratio and high precision are becoming urgent. The adjustable ratio and the adjusting precision of the existing sleeve type control valve are lower, so that the application of complex extreme working conditions can be met. Therefore, a combined valve core sleeve control valve driven by a gear structure is constructed, an application method of the combined valve core sleeve control valve is provided, and an idea is provided for designing a control valve with complicated extreme working conditions such as high temperature, high pressure, large flow, high pressure difference and the like, so that the combined valve core sleeve control valve is an important research direction in the current fluid control field.
Therefore, it is needed to provide a control valve and an application method thereof, which can be applied to complex extreme working conditions to realize large adjustable ratio and high adjustment precision.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a combined valve core assembly with double-degree-of-freedom control, a sleeve control valve and a method thereof. The invention can adjust the positions of the valve plug and the sleeve of the control valve through the external actuating mechanism on the premise of not changing the valve body structure of the control valve, change the flow characteristic of the control valve and realize the accurate control of double degrees of freedom of fluid.
The specific technical scheme adopted by the invention is as follows:
in a first aspect, the invention provides a combined valve core assembly with double-degree-of-freedom control, which comprises a valve plug, an inner sleeve and an outer sleeve which are coaxially and sequentially laminated from inside to outside;
the valve plug is of a columnar structure, a plurality of vertical through holes are formed in the axial direction, the top of the valve plug is connected with the valve rod, and the valve plug can vertically slide along the inner wall of the inner sleeve in a sealing manner along with the vertical movement of the valve rod; the inner sleeve is circumferentially provided with a plurality of first throttling windows, and the height of each first throttling window is smaller than the height of the valve plug; an inner gear tooth form is processed at the upper end of the inner wall of the inner sleeve along the circumferential direction and is used for being meshed with an outer gear tooth form at the bottom of the sleeve rotary rod; the sleeve rotary rod is connected with the valve cover in a sealing way, and the upper part of the sleeve rotary rod is exposed out of the valve cover; the inner sleeve can be sealed and rotated along the inner wall of the outer sleeve under the meshing transmission by rotating the sleeve rotating rod; the outer sleeve is fixedly connected with the valve body, a plurality of second throttling windows are uniformly formed in the circumferential direction, and the number and the size of the second throttling windows are the same as those of the first throttling windows.
Preferably, the valve plug is in clearance fit with the inner sleeve, and the inner sleeve is in clearance fit with the outer sleeve.
Preferably, the tooth shape of the external gear at the bottom of the sleeve rotary rod is equal to the tooth shape of the internal gear at the upper end of the inner wall of the inner sleeve, and the tooth shape structure modulus of the external gear and the tooth shape of the internal gear are equal.
Preferably, the rotary sleeve rotary rod is provided with a Hall effect angle sensor.
Preferably, chamfer processing is carried out on the upper ends of the inner walls of the outer sleeve and the inner sleeve, and the valve plug is connected with the valve rod through bolts.
In a second aspect, the present invention provides a sleeve control valve having any one of the combination valve cartridge assemblies of the first aspect, comprising a valve body, a valve seat, a valve stem, a valve cover, an actuator, and an actuator bracket;
the top of the valve body is provided with a valve cover in a sealing way, an executing mechanism bracket is arranged above the valve cover, and an executing mechanism for controlling the valve rod to axially move is fixed on the executing mechanism bracket; the bottom of the outer sleeve is fixed in the inner cavity of the valve body through the valve seat, and the top of the outer sleeve is arranged at the bottom of the valve cover and is in circumferential sealing connection with the valve body.
Preferably, the valve seat is a stepped annular part, and the step height of the valve seat is matched with that of the outer sleeve and the inner sleeve so as to axially and radially position the outer sleeve and the inner sleeve; the diameter of the root circle of the tooth-shaped part of the inner sleeve is smaller than the inner diameter of the inner sleeve, so that the inner sleeve is used for axially positioning a sleeve rotary rod; the valve cover is a stepped cylindrical part, a through hole is formed in the center shaft for positioning the valve rod, and a through hole is formed in the eccentric position of the center shaft for positioning the sleeve rotary rod.
Preferably, annular sealing filler is used for filling between the valve rod and the valve cover, an annular filler gasket is arranged at the bottom of the sealing filler, and the top of the sealing filler is tightly pressed by a filler gland to provide sealing for the sealing filler.
Preferably, the areas of the first throttling window and the second throttling window are smaller than the inlet area of the valve body; the inner sleeve is driven by the sleeve rotating rod to rotate along the axial direction of the outer sleeve, so that the first throttling window and the second throttling window can be overlapped; the valve plug is driven by the valve rod to move up and down along the inner sleeve, so that the valve plug can completely cover and open the first throttle window.
In a third aspect, the present invention provides a method for using the sleeve control valve according to any one of the second aspects, specifically as follows:
connecting a Hall effect angle sensor with the sleeve rotary rod, and acquiring rotation angle data of the sleeve rotary rod in real time through the Hall effect angle sensor;the transmission ratio i=Z of the gear transmission is calculated by the ratio of the teeth number of the inner sleeve and the sleeve rotary rod 1 /Z 2 The inner sleeve rotation angle α=β/i; wherein Z is 1 For the number of teeth of the internal gear of the inner sleeve, Z 2 The number of teeth of the external gear of the sleeve rotary rod is beta, and the rotation angle of the sleeve rotary rod is recorded by a Hall effect angle sensor;
according to the application scene requirement of the control valve, controlling the rotation angle of the sleeve rotary rod to adjust the superposition area of the first throttling window and the second throttling window; simultaneously, the axial displacement of the valve rod is regulated by the actuating mechanism, so that the valve plug moves to the target height, and the shielding area of the first throttle window is regulated;
fluid entering the inner cavity of the valve body from the inlet passes through the superposition of the first throttling window and the second throttling window and flows out of the inner cavity of the valve body from the bottom of the valve plug through the valve seat and then flows out of the inner cavity of the valve body from the outlet; the opening degree of the sleeve control valve is adjusted by controlling the movement positions of the valve plug and the inner sleeve.
Compared with the prior art, the invention has the following beneficial effects:
the invention can realize the rotation of the inner sleeve through gear transmission on the premise of not changing the structure of the traditional control valve. The valve plug is displaced up and down to change the flow area between the valve plug and the inner sleeve, the inner sleeve rotates to change the flow area between the inner sleeve and the outer sleeve, and the two flow areas are mutually influenced, so that the control of double degrees of freedom of fluid is realized, and the adjusting precision and the maximum adjustable ratio of the control valve are improved.
Drawings
FIG. 1 is a schematic illustration of a sleeve control valve configuration with dual degrees of freedom control.
FIG. 2 is a schematic view of an outer sleeve construction; wherein, fig. (a) is a sectional view, fig. b is a front view, fig. c is a plan view, and fig. d is a partial enlarged view.
FIG. 3 is a schematic view of an inner sleeve structure; wherein, fig. (a) is a sectional view, fig. b is a front view, fig. c is a plan view, and fig. d is a partial enlarged view.
FIG. 4 is a schematic view of a sleeve spin lever; wherein, fig. (a) is a front view, and fig. (b) is a bottom view.
FIG. 5 is a schematic view of the inner sleeve engaging the sleeve lever gear.
In the figure: the valve comprises a valve body 1, a valve seat 2, a valve plug 3, an inner sleeve 4, an outer sleeve 5, a valve rod 6, a valve cover 7, a sleeve rotary rod 8, a packing gland 9, an actuating mechanism 10, an actuating mechanism bracket 11, sealing packing 12 and a packing gasket 13.
Detailed Description
The invention is further illustrated and described below with reference to the drawings and detailed description. The technical features of the embodiments of the invention can be combined correspondingly on the premise of no mutual conflict.
As shown in fig. 1, the combined valve core assembly with the dual-degree-of-freedom control provided by the invention mainly comprises a valve plug 3, an inner sleeve 4 and an outer sleeve 5. Wherein, valve plug 3, inlayer sleeve 4 and outer sleeve 5 are coaxial to be laid by interior to outside in proper order, and clearance fit between valve plug 3 and the inlayer sleeve 4, and valve plug 3 can be spacing down along vertical removal from top to bottom of inner wall of inlayer sleeve 4, clearance fit between inlayer sleeve 4 and outer sleeve 5, and inlayer sleeve 4 can be spacing down along the center pin rotation of inner wall of outer sleeve 5.
The structure and connection of the components will be described in detail.
In the combined valve core assembly, the valve plug 3 is of a columnar structure, and a plurality of vertical through holes are axially formed in the valve plug 3, so that the pressure above and below the valve plug 3 is ensured to be the same, and the driving force required by the up-and-down movement of the valve plug 3 is reduced. The top of the valve plug 3 is used for being connected with the valve rod 6 and can slide along the inner wall of the inner sleeve 4 in an up-and-down sealing way along with the vertical movement of the valve rod 6. In this embodiment, the valve plug 3 is a cylindrical solid part, and the diameter of the valve plug 3 is the same as the inner diameter of the inner sleeve 4.
In the combined valve core assembly of the invention, as shown in fig. 3, a plurality of first throttling windows which are arranged at intervals are circumferentially arranged on the inner sleeve 4, and the height of the first throttling windows is smaller than that of the valve plug 3. The upper end of the inner wall of the inner sleeve 4 is circumferentially provided with an internal gear profile which is used for being meshed with the external gear profile at the bottom of the sleeve rotary rod 8, as shown in fig. 5. The sleeve rotary rod 8 is in sealing connection with the valve cover 7, the upper part of the sleeve rotary rod 8 is exposed out of the valve cover 7, and the structure of the sleeve rotary rod 8 is shown in fig. 4. By rotating the sleeve rotary rod 8, the inner sleeve 4 can rotate along the inner wall of the outer sleeve 5 in a sealing way under the meshing transmission.
In this embodiment, the inner sleeve 4 is a hollow cylindrical part, and the outer wall of the inner sleeve is provided with first throttle windows for fluid circulation, wherein the first throttle windows are uniformly distributed along the circumferential direction of the outer wall, and the total number of the first throttle windows is N. The outer diameter of the inner sleeve 4 is the same as the inner diameter of the outer sleeve 5, and the inner sleeve 4 can freely rotate inside the outer sleeve 5. The upper end of the inner wall of the inner sleeve 4 is provided with an inner gear tooth shape, the gear tooth number is Z1, and the modulus is M. The height of the inner sleeve 4 is smaller than the height difference between the valve seat 2 and the valve cover 7, so that the inner sleeve can freely rotate in the outer sleeve, and the driving force provided by the sleeve rotating rod is reduced. The tooth-shaped structure modulus of the sleeve rotary rod 8 is equal to the tooth-shaped structure modulus of the inner sleeve 4. The extent of the upward and downward movement of the valve plug 3 along the inner sleeve 4 under the actuation of the valve stem 6 should be such that the valve plug 3 completely obscures and opens the first throttle opening.
In this embodiment, a hall effect angle sensor is provided on the rotating sleeve lever 8. The Hall effect angle sensor is connected with the sleeve rotary rod through threaded connection and is fixed through a bracket. The Hall effect angle sensor is powered by an external power supply, is connected with an external computer through a data cable, and reads the real-time rotation angle of the sleeve rotary rod by the computer. The rotary driving force of the socket rotary rod is provided by a rotary actuating mechanism or an internal hexagonal wrench.
In the combined valve core assembly, as shown in fig. 2, an outer sleeve 5 is fixedly connected with a valve body 1, a plurality of second throttling windows are uniformly formed in the circumferential direction, and the number and the size of the second throttling windows are the same as those of the first throttling windows. Fluid flows in from the inlet of the valve body 1, passes through the throttle windows of the outer sleeve 5 and the inner sleeve 4, and flows out of the outlet of the valve body 1 through the valve seat.
In this embodiment, the outer sleeve 5 is a hollow cylindrical part, the outer wall of the outer sleeve has a step-shaped protruding structure for being matched with the valve body 1 and the valve cover 7 to play an axial positioning role, the outer wall of the outer sleeve is provided with second throttling windows for fluid circulation, the second throttling windows are uniformly distributed along the circumferential direction of the outer wall, and the total number of the second throttling windows is N. The areas of the first throttle window and the second throttle window should be smaller than the inlet area of the valve body 1 to ensure the regulating capability of the control valve under the condition of large flow. The inner sleeve 4 is driven by the sleeve screw 8 along the axial rotation range of the outer sleeve 5, so that the first throttle window and the second throttle window can be overlapped.
As shown in fig. 1, the present invention also provides a sleeve control valve having the above-mentioned combined valve core assembly, which mainly includes a valve body 1, a valve seat 2, a valve stem 6, a valve cover 7, an actuator 10, and an actuator bracket 11. The top of the valve body 1 is provided with a valve cover 7 in a sealing way. An actuator bracket 11 is arranged above the valve cover 7, and an actuator 10 for controlling the valve rod 6 to axially move is fixed on the actuator bracket 11. When in actual use, the actuating mechanism is controlled to move through signal input, and the valve plug position is adjusted. The bottom of the outer sleeve 5 is fixed in the inner cavity of the valve body 1 through the valve seat 2, and the top is arranged at the bottom of the valve cover 7 and is in circumferential sealing connection with the valve body 1.
Specifically, the valve rod 6 and the sleeve rotary rod 8 are components for providing driving force for the movement of the valve plug 3 and the inner sleeve 4. The valve rod 6 is a long rod-shaped part, the top end of the valve rod 6 is connected with an actuating mechanism 10, and the actuating mechanism 10 pushes the valve rod 6 to move up and down, so that the driving force is provided for the movement of the valve plug 3 inside the inner sleeve 4. As shown in fig. 4, the sleeve rotary rod 8 is a step-shaped rod-shaped part, the lower end of the sleeve rotary rod 8 is processed with a standard external gear tooth shape, the gear tooth number is Z2, and the modulus is M. The middle section of the sleeve rotary rod 8 is provided with annular grooves with the number of A for installing O-shaped sealing rings. The tooth form of the sleeve rotary rod 8 is equal to the tooth form modulus of the inner sleeve 4, the tooth forms are meshed with each other, and the sleeve rotary rod 8 rotates to drive the inner sleeve 4 to rotate through gear transmission.
In the sleeve control valve, sealing is carried out through an O-shaped sealing ring, a sealing filler and a special structure, and the concrete steps are as follows:
the upper end of the outer wall of the outer sleeve 5 and the stepped protruding structure are provided with annular grooves for installing O-shaped sealing rings, and sealing is provided between the outer sleeve 5 and the valve body 1 and between the outer sleeve and the valve cover 7. Annular grooves are formed in the lower end of the outer wall of the inner sleeve 4 and the upper part of the throttle window, and are used for installing O-shaped sealing rings to provide sealing between the inner sleeve 4 and the outer sleeve 5. The upper end of the outer wall of the valve plug 3 is provided with an annular groove for installing an O-shaped sealing ring to provide sealing between the valve plug 3 and the inner sleeve 4. The lower end of the outer wall of the valve seat 2 is provided with an annular groove for installing an O-shaped sealing ring to provide sealing between the valve seat 2 and the valve body 1. The valve rod 6 and the valve cover 7 are filled with annular sealing packing, an annular packing pad is arranged at the bottom of the packing, and the packing is tightly pressed by a packing gland 9 to provide sealing for the valve rod 6 and the valve cover 7. The contact part of the valve plug 3 and the valve seat 2 is subjected to chamfering, the chamfer angle of the lower end of the outer wall of the valve plug 3 is 45 degrees, and the chamfer angle of the upper end of the inner wall of the valve seat 2 is 44 degrees, so that sealing is provided for the valve plug 3 and the valve seat 2 under the condition that the control valve is closed.
In the sleeve control valve, parts are specially machined for assembly. Adopt bolted connection between valve rod 6 and the valve plug 3, the screw of valve rod 6 and valve plug 3 adopts to join in marriage and beat the processing to guarantee the assembly precision. The upper end of the inner wall of the outer sleeve 5 is chamfered so as to fit the inner sleeve 4 into the outer sleeve 5. The upper end of the inner wall of the inner sleeve 4 is chamfered so as to fit the inner sleeve 4 into the outer sleeve 5. The diameter of the tooth root circle of the tooth-shaped part of the inner sleeve 4 is smaller than the inner diameter of the inner sleeve 4, so as to realize the axial positioning function of the sleeve rotary rod 8. The inner sleeve 4 and the outer sleeve 5 are subjected to clearance fit processing, the valve plug 3 and the inner sleeve 4 are subjected to clearance fit processing, and the sleeve rotating rod 8 and the valve cover 7 are subjected to clearance fit processing. The valve rod 6 and the valve cover 7 are processed by clearance fit.
In the sleeve control valve, the components are specially machined to improve stability. The valve plug 3 is provided with uniformly distributed holes, so that the pressure between the upper part and the lower part of the valve plug 3 is ensured to be the same, and the driving force required by the up-and-down movement of the valve plug 3 is reduced. The contact part of the valve rod 6 with the filler in the movement process is processed by using higher-grade surface roughness, so that the friction force of the valve rod 6 in the movement process is reduced, and the driving force required by the up-and-down movement of the valve plug 3 is reduced. The bolt connection of the valve rod 6 and the valve plug 3 uses a lock washer, so that the stability of the connection of the valve rod 6 and the valve plug 3 in the use process of the control valve is ensured. Preferably, the height of the inner sleeve 4 should be smaller than the height difference between the valve seat 2 and the valve cover 7, so that the inner sleeve 4 can freely rotate inside the outer sleeve 5, and the driving force provided by the sleeve rotary rod 8 is reduced. Preferably, the throttle window area of the outer sleeve 5 or the inner sleeve 4 should be smaller than the valve body inlet area to ensure the control valve's capacity for high flow conditions.
The using method of the sleeve control valve is as follows:
first, the valve body 1, the valve cap 7, the valve seat 2, the valve plug 3, the valve stem 6, the inner sleeve 4, the outer sleeve 5, the sleeve rotary rod 8, the packing gland 9, the actuator 10 and the like are installed, and then the sleeve control valve is connected with the inlet pipe and the outlet pipe through standard flanges.
And a Hall effect angle sensor is connected with the sleeve rotary rod 8, the angle sensor is fixed, and the rotation angle data of the sleeve rotary rod 8 is acquired in real time through the Hall effect angle sensor.
Calculating the transmission ratio i=z of the gear transmission by the ratio of the number of teeth of the inner sleeve 4 and the sleeve rotary rod 8 1 /Z 2 The inner sleeve 4 rotates by an angle α=β/i. Wherein Z is 1 For the number of teeth of the internal gear of the inner sleeve 4, Z 2 The number of teeth of the external gear of the sleeve rotary rod 8 is beta, and the rotation angle of the sleeve rotary rod 8 is recorded by a Hall effect angle sensor.
According to the application scene requirement of the control valve, the rotation angle of the sleeve rotary rod 8 is controlled to adjust the superposition area of the first throttling window and the second throttling window. At the same time, the axial displacement of the valve rod 6 is adjusted by the actuator 10, so that the valve plug 3 moves to the target height, and the shielding area of the first throttle window is adjusted.
Fluid entering the inner cavity of the valve body 1 from the inlet passes through the superposition of the first throttling window and the second throttling window and flows out of the inner cavity of the valve body 1 from the bottom of the valve plug 3 through the valve seat 2 from the outlet. The areas of the first throttling window and the second throttling window are respectively changed through the movement positions of the control valve plug 3 and the inner sleeve 4, and the two flow areas are mutually influenced, so that the control of the two degrees of freedom of the fluid in the control valve is realized.
The above embodiment is only a preferred embodiment of the present invention, but it is not intended to limit the present invention. Various changes and modifications may be made by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present invention. Therefore, all the technical schemes obtained by adopting the equivalent substitution or equivalent transformation are within the protection scope of the invention.

Claims (10)

1. The combined valve core assembly with the double degrees of freedom control is characterized by comprising a valve plug (3), an inner sleeve (4) and an outer sleeve (5) which are coaxially and adjacently arranged in sequence from inside to outside;
the valve plug (3) is of a columnar structure, a plurality of vertical through holes are formed in the axial direction, the top of the valve plug is connected with the valve rod (6), and the valve plug can vertically slide along the inner wall of the inner sleeve (4) in a sealing manner along with the vertical movement of the valve rod (6); a plurality of first throttling windows are formed in the circumferential direction of the inner sleeve (4), and the heights of the first throttling windows are smaller than those of the valve plug (3); an inner gear tooth form is processed at the upper end of the inner wall of the inner sleeve (4) along the circumferential direction and is used for being meshed with an outer gear tooth form at the bottom of the sleeve rotary rod (8); the sleeve rotary rod (8) is in sealing connection with the valve cover (7) and the upper part of the sleeve rotary rod is exposed out of the valve cover (7); the inner sleeve (4) can be sealed and rotated along the inner wall of the outer sleeve (5) under the meshing transmission by rotating the sleeve rotary rod (8); the outer sleeve (5) is fixedly connected with the valve body (1), a plurality of second throttling windows are uniformly formed in the circumferential direction, and the number and the size of the second throttling windows are the same as those of the first throttling windows.
2. The combined valve core assembly with the double-freedom degree control according to claim 1 is characterized in that clearance fit is adopted between the valve plug (3) and the inner sleeve (4), and clearance fit is adopted between the inner sleeve (4) and the outer sleeve (5).
3. The combined valve core assembly with the double degrees of freedom control according to claim 1 is characterized in that the tooth shape of an external gear at the bottom of the sleeve rotary rod (8) is equal to the tooth shape of an internal gear at the upper end of the inner wall of the inner sleeve (4).
4. A combined valve core assembly with dual degree of freedom control according to claim 1 wherein the rotary sleeve lever (8) is provided with a hall effect angle sensor.
5. The combined valve core assembly with the double-degree-of-freedom control according to claim 1, wherein the upper ends of the inner walls of the outer sleeve (5) and the inner sleeve (4) are chamfered, and the valve plug (3) and the valve rod (6) are connected through bolts.
6. A sleeve control valve with a combined valve core assembly according to any one of claims 1-5, characterized by comprising a valve body (1), a valve seat (2), a valve stem (6), a valve cover (7), an actuator (10) and an actuator bracket (11);
a valve cover (7) is arranged on the top of the valve body (1) in a sealing way, an actuating mechanism bracket (11) is arranged above the valve cover (7), and an actuating mechanism (10) for controlling the valve rod (6) to axially move is fixed on the actuating mechanism bracket (11); the bottom of the outer sleeve (5) is fixed in the inner cavity of the valve body (1) through the valve seat (2), and the top is arranged at the bottom of the valve cover (7) and is in circumferential sealing connection with the valve body (1).
7. Sleeve control valve according to claim 6, characterized in that the valve seat (2) is a stepped annular part, the step height of which cooperates with the outer sleeve (5) and the inner sleeve (4) for axial and radial positioning of the outer sleeve (5) and the inner sleeve (4); the diameter of the tooth root circle of the tooth-shaped part of the inner sleeve (4) is smaller than the inner diameter of the inner sleeve (4) so as to axially position the sleeve rotary rod (8); the valve cover (7) is a stepped cylindrical part, a through hole is formed in the central shaft for positioning the valve rod (6), and a through hole is formed in the eccentric position of the central shaft for positioning the sleeve rotary rod (8).
8. Sleeve control valve according to claim 6, characterized in that the valve stem (6) and the valve cap (7) are filled with an annular packing (12), an annular packing washer (13) is arranged at the bottom of the packing (12), the top of the packing (12) is pressed by a packing gland (9), and a seal is provided for the packing (12).
9. The sleeve control valve according to claim 6, characterized in that the area of both the first and second throttle windows is smaller than the inlet area of the valve body (1); the inner sleeve (4) is driven by the sleeve rotary rod (8) to rotate along the axial direction of the outer sleeve (5), so that the first throttling window and the second throttling window can be overlapped; the valve plug (3) moves up and down along the inner sleeve (4) under the drive of the valve rod (6), so that the valve plug (3) can completely cover and open the first throttle window.
10. A method of using the sleeve control valve of any one of claims 6 to 9, comprising the steps of:
connecting a Hall effect angle sensor with the sleeve rotary rod (8), and acquiring rotation angle data of the sleeve rotary rod (8) in real time through the Hall effect angle sensor; the gear ratio i=Z of the gear transmission is calculated by the ratio of the teeth of the inner sleeve (4) and the sleeve rotary rod (8) 1 /Z 2 The rotation angle alpha=beta/i of the inner sleeve (4); wherein Z is 1 Is the number of teeth of the internal gear of the inner sleeve (4), Z 2 The number of teeth of the external gear of the sleeve rotary rod (8), and beta is the rotation angle of the sleeve rotary rod (8) recorded by the Hall effect angle sensor;
according to the application scene requirement of the control valve, controlling the rotation angle of the sleeve rotary rod (8) to adjust the superposition area of the first throttling window and the second throttling window; simultaneously, the axial displacement of the valve rod (6) is adjusted through the actuating mechanism (10), so that the valve plug (3) moves to the target height, and the shielding area of the first throttle window is adjusted;
fluid entering the inner cavity of the valve body (1) from the inlet passes through the superposition of the first throttling window and the second throttling window and flows out of the inner cavity of the valve body (1) from the bottom of the valve plug (3) through the valve seat (2) from the outlet; the double-degree-of-freedom adjustment of the opening degree of the sleeve control valve is realized by controlling the movement positions of the valve plug (3) and the inner sleeve (4).
CN202310406194.4A 2023-04-17 2023-04-17 Combined valve core assembly with double-degree-of-freedom control, sleeve control valve and method thereof Pending CN116498765A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310406194.4A CN116498765A (en) 2023-04-17 2023-04-17 Combined valve core assembly with double-degree-of-freedom control, sleeve control valve and method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310406194.4A CN116498765A (en) 2023-04-17 2023-04-17 Combined valve core assembly with double-degree-of-freedom control, sleeve control valve and method thereof

Publications (1)

Publication Number Publication Date
CN116498765A true CN116498765A (en) 2023-07-28

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310406194.4A Pending CN116498765A (en) 2023-04-17 2023-04-17 Combined valve core assembly with double-degree-of-freedom control, sleeve control valve and method thereof

Country Status (1)

Country Link
CN (1) CN116498765A (en)

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