CN107939981A - The low temperature electric control valve and adjusting method of preload adjustable - Google Patents
The low temperature electric control valve and adjusting method of preload adjustable Download PDFInfo
- Publication number
- CN107939981A CN107939981A CN201711394676.3A CN201711394676A CN107939981A CN 107939981 A CN107939981 A CN 107939981A CN 201711394676 A CN201711394676 A CN 201711394676A CN 107939981 A CN107939981 A CN 107939981A
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- valve
- elastic component
- spool
- push rod
- motor
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- 230000036316 preload Effects 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000007789 sealing Methods 0.000 claims abstract description 31
- 230000007246 mechanism Effects 0.000 claims abstract description 24
- 239000007788 liquid Substances 0.000 claims abstract description 18
- 239000003566 sealing material Substances 0.000 claims description 18
- 239000003638 chemical reducing agent Substances 0.000 claims description 17
- 230000000694 effects Effects 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 230000003028 elevating effect Effects 0.000 claims description 3
- 230000000452 restraining effect Effects 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 6
- 230000001105 regulatory effect Effects 0.000 abstract description 4
- 238000005299 abrasion Methods 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910000619 316 stainless steel Inorganic materials 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229920002493 poly(chlorotrifluoroethylene) Polymers 0.000 description 1
- 239000005023 polychlorotrifluoroethylene (PCTFE) polymer Substances 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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
- 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
- F16K1/02—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 screw-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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
- F16K31/047—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor characterised by mechanical means between the motor and the valve, e.g. lost motion means reducing backlash, clutches, brakes or return means
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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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/50—Mechanical actuating means with screw-spindle or internally threaded actuating means
- F16K31/508—Mechanical actuating means with screw-spindle or internally threaded actuating means the actuating element being rotatable, non-rising, and driving a non-rotatable axially-sliding element
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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
- 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
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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
- F16K41/00—Spindle sealings
- F16K41/10—Spindle sealings with diaphragm, e.g. shaped as bellows or tube
Abstract
The present invention provides a kind of the low temperature electric control valve and adjusting method of preload adjustable, and the low temperature electric control valve of preload adjustable includes：Valve body structure, pretightning force adjustment structure and driving mechanism；The valve body structure includes valve body, valve seat, inlet, liquid outlet, valve rod and spool；The pretightning force adjustment structure includes：Elastic component mounting base, elastic component, push rod briquetting, push rod, case and baffle.Advantage is：(1) in valve closing process, simple and quick it can accurately detect sealing force size between spool and valve seat, so that the sealing force between spool and valve seat is controlled in required scope, by regulating valve pretightning force it is non-adjustable be changed to it is adjustable, adjust the pretightning force that valve seat and valve core sealed cover fit closely more reasonable, prevent pretightning force excessive and pretightning force is insufficient, effectively reduction spool is worn on the premise of satisfaction leakage requires, and improves the service life of valve.
Description
Technical field
The invention belongs to valve technology field, and in particular to a kind of low temperature electric control valve of preload adjustable and adjusting
Method.
Background technology
Control valve various types at present, also have many patents, but existing all kinds of control valves, are mainly asked with following
Topic：When control valve is closed, due to that can not detect the sealing force between valve seat and valve core sealed cover, usually occur
The problem of sealing force is excessive or too small, if sealing force is too small, easily reveals；If sealing force is excessive, and can be effectively increased
Spool is worn, and reduces the service life of valve.Therefore, how it is simple and effective control spool and valve seat between sealing force,
Meet that leakage effectively reduces spool abrasion on the premise of requiring, improve the service life of valve, be in the urgent need to address at present
Thing.
The content of the invention
In view of the defects existing in the prior art, the present invention provides a kind of the low temperature electric control valve and tune of preload adjustable
Section method, can effectively solve the above problems.
The technical solution adopted by the present invention is as follows：
The present invention provides a kind of low temperature electric control valve of preload adjustable, including：Valve body structure, pretightning force adjustment structure
And driving mechanism；
The valve body structure includes valve body (26), valve seat (25), inlet (30), liquid outlet (31), valve rod (17) and valve
Core (18)；
The pretightning force adjustment structure includes：Elastic component mounting base (16), elastic component (19), push rod briquetting (15), push rod
(10), case (14) and baffle (13)；
The driving mechanism is used to drive the push rod (10) to carry out straight line elevating movement；
Wherein, the driving mechanism is installed on the case (14) above；The bottom of the case (14) is provided with screw thread
Opening；The top of the valve rod (17) and the threaded openings of the case (14) are sealedly and fixedly connected；The bottom of the valve rod (17)
The opening with the valve body (26) is held to be sealedly and fixedly connected；Described in being fixedly mounted above the threaded openings of the case (14)
Baffle (13)；The inner cavity chamber of the baffle (13) and the valve rod (17) forms moving chambers；The top position of the push rod (10)
It is connected in the inside of the case (14), and with the driving mechanism；The bottom of the push rod (10) passes through the baffle (13)
And extend in the moving chambers；The bottom of the push rod (10) has step-like protuberance；The elastic component mounting base
(16) inside has the chamber for being used for placing the elastic component (19)；The top of the elastic component mounting base (16) is pushed away with described
Bar briquetting (15) is threadedly coupled and forms mass motion component；Also, the mass motion component offer with it is described step-like prominent
Go out the step-like groove that portion matches；The mass motion component hangs on the push rod (10) by the step-like groove
Step-like protuberance on, at this time, the elastic component (19) internal positioned at the elastic component mounting base (16) is pushed away positioned at described
The underface of bar (10), the elastic component (19) are initially compressive state, have pretightning force；
The valve body (26) is arranged at the lower section of the valve rod (17)；The valve body (26) have the inlet (30) and
The liquid outlet (31)；The inside of the valve body (26) has the valve seat (25)；Described in the leading portion of the spool (18) is fixed
Spool leading portion sealing material (24)；The back segment portion of the spool (18) and the bottom of the elastic component mounting base (16) are fixed and are connected
Connect；When the push rod (10) carries out first motion downwards under the driving effect of the driving mechanism, the elastic component is driven
The entirety that mounting base (16), the push rod briquetting (15) and the elastic component (19) are formed moves downward；And work as the elastic component
When mounting base (16) moves downward, the spool (18) is promoted to be moved to the position close to the valve seat (25)；When the spool
(18) when spool leading portion sealing material (24) is contacted with the valve seat (25), cut off the inlet (30) and arrive the liquid outlet
(31) path, valve are closed.
Preferably, the inlet (30) of the valve body (26) and liquid outlet (31) are respectively designed with the cutting ferrule being connected with pipeline
(27)。
Preferably, the back segment portion of the spool (18) and the bottom of the elastic component mounting base (16) pass through elastic pin shaft
(20) it is fixedly connected.
Preferably, the contact surface between the valve seat (25) and the spool (18) is sealed using bellows (21)；It is described
The stage casing of spool (18) and the bellows (21) welded seal.
Preferably, sealed between the valve seat (25) and the bellows (21) using gasket seal (23).
Preferably, connected and fixed by clamp nut (22) between the valve rod (17) and the valve body (26).
Preferably, the driving mechanism includes：Motor (2), encoder (1), gear reducer (3), ball screw (7), sliding block
(11), line slideway (28), lower close switch (9) and upper close switch (29)；
The output terminal of the motor (2) is linked by the gear reducer (3) and the ball screw (7), the ball wire
Bar (7) assembles the sliding block (11) above, and the motor (2) drives ball screw (7) rotational motion, and then is converted into institute
State the linear motion of sliding block (11)；The line slideway (28) is installed in the glide direction of the sliding block (11), makes the sliding block
(11) moved along the line slideway (28)；The encoder (1) is used for the rotational angle for measuring the motor (2), Jin Erke
It is converted into the displacement of the sliding block (11)；
In the restraining position up and down of the sliding block (11), respectively install described upper close to switch (29) and described lower close to switch
(9)。
Preferably, the driving mechanism further includes：Axle sleeve (4), bearing (5), the support of bearing (6) and limited block (8)；
The ball screw (7) is connected by the axle sleeve (4) with the gear reducer (3)；Ball screw (7) installation
On the bearing (5), the bearing (5) is fixed on the inside of the case (14) by the support of bearing (6), passes through institute
Bearing (5) is stated, reduces the ball screw (7) side direction perturbation；Limited block (8) described in side arrangement in the sliding block (11).
The present invention also provides a kind of adjusting method of the low temperature electric control valve based on preload adjustable, including following step
Suddenly：
Step 1, during original state, spool (18) is located at fully open position point, and at this time, elastic component (19) passes through elastic component
Mounting base (16) and push rod (10) it is spacing, in compressive state, elastic component (19) preload pressure is F0；
Step 2, valve closes the first stage：When needing to close valve, starting motor (2), motor (2) starts to rotate,
Encoder (1) records the rotational angle of motor (2) in real time；Motor (2) reduces rotating speed by gear reducer (3) to carry by a certain percentage
High torque, and then drive ball screw (7) to rotate；The rotation of ball screw (7) is changed into the linear motion of sliding block (11)；Work as cunning
When block (11) is moved along a straight line downwards, promote push rod (10) to move along a straight line downwards, hung on so as to drive on push rod (10)
The entirety that elastic component mounting base (16), push rod briquetting (15) and elastic component (19) are formed moves downward；And when the elastic component is pacified
When dress seat (16) moves downward, spool (18) is promoted to be moved to the position close to valve seat (25)；When spool (18) moves to closing
During location point, the spool leading portion sealing material (24) of spool (18) has just been contacted with valve seat (25), so as to cut off inlet (30)
To the path of liquid outlet (31), valve is closed；At this time, elastic component (19) is identical with initial compressed state, valve seat and seal spool
Sealing force between face is 0；During in the first stage, data are recorded by encoder (1), are converted into spool (18) straight line fortune
Dynamic distance, the move distance of spool (18) in the first stage is equal to the move distance of push rod (10) in the first stage, by push rod
(10) move distance in the first stage is denoted as L1；
Step 3, valve closes second stage：The position of elastic component mounting base (16) and spool (18) remains unchanged, described
Push rod (10) continues to produce thrust, at this time, the spool leading portion sealing material (24) of spool (18) under the driving effect of motor (2)
Deformation takes place, produces reaction force, when push rod (10) thrust is more than the preload pressure of elastic component (19), elastic component
(19) start to deform, elastic component (19) is equal to move distance of the push rod (10) in second stage in the deflection of second stage；And
Push rod (10) subtracts L1 in the move distance of second stage for the total move distance of push rod that encoder detects；
The preload pressure for being equal to elastic component (19) due to the sealing force between valve seat and valve core sealed cover adds elastic component
(19) elastic force produced in second stage deformation；So the sealing force between valve seat and valve core sealed cover can detect to obtain；Work as valve
When sealing force between seat and valve core sealed cover reaches requirement, motor (2) stops operating, and valve is in cut-off state at this time；
Step 4, when wanting Open valve, motor (2) is started, motor (2) starts to rotate backward, and encoder (1) is remembered in real time
Record the rotational angle of motor (2)；Motor (2) reduces rotating speed by gear reducer (3) to improve moment of torsion by a certain percentage, and then drives
Ball screw (7) rotates；The rotation of ball screw (7) is changed into the linear motion of sliding block (11)；When sliding block (11) carries out upwards
During linear motion, push rod (10) is pulled to move along a straight line upwards, elastic component (19) and spool leading portion sealing material (24) start
Recover deformation, when elastic component (19) returns to original state, push rod (10) drives elastic component mounting base (16), push rod briquetting
(15) and elastic component (19) formed entirety up move along a straight line；And when elastic component mounting base (16) is moved upwards, directly draw
Movable valve plug (18) is away from valve seat (25), and until spool (18) moves to fully open position point, motor (2) stops operating, at this time
Valve is in fully open state.
The low temperature electric control valve and adjusting method of preload adjustable provided by the invention have the following advantages：
(1) in valve closing process, simple and quick sealing force size between spool and valve seat can be accurately detected,
So that the sealing force control between spool and valve seat is in required scope, it is changed to adjustable by regulating valve pretightning force is non-adjustable, makes valve
It is more reasonable that the pretightning force that seat and valve core sealed cover fit closely is adjusted, and prevents pretightning force excessive and pretightning force is insufficient, meeting
Leakage effectively reduces spool abrasion on the premise of requiring, and improves the service life of valve；
(2) in valve closing process, since elastic component has initial pretightning force, can accelerate spool and valve seat it
Between sealing force reach the speed of desirable value, accelerate valve closing velocity；
(3) the initial pretightning force of elastic component adjusts, flexible and convenient to use.
(4) by setting corrugated tube sealing structure, the electricity that cryogenic media cold is transmitted to top half has effectively been completely cut off
Gas executive component, uses suitable for low temperature；
(5) design structure is advanced, reasonable, effectively reduces the size of valve entirety.
Brief description of the drawings
Fig. 1 is the overall cross-sectional view of the low temperature electric control valve of preload adjustable provided by the invention；
Fig. 2 is the part section structural representation of the low temperature electric control valve of preload adjustable provided by the invention；
Wherein：
1：Encoder；2：Motor；3：Gear reducer；4：Axle sleeve；5：Bearing；6：The support of bearing；7：Ball screw；8：It is spacing
Block；9：Lower close switch；10：Push rod；11：Sliding block；12：Push rod connector；13：Baffle；14：Case；15：Push rod briquetting；16：Bullet
Property part mounting base；17：Valve rod；18：Spool；19：Elastic component；20：Elastic pin shaft；21：Bellows；22：Clamp nut；23：It is close
Gasket；24：Spool leading portion sealing material；25：Valve seat；26：Valve body；27：Cutting ferrule.28：Line slideway；29：Upper close switch；
30：Inlet；31：Liquid outlet.
Embodiment
In order to which technical problem, technical solution and beneficial effect solved by the invention is more clearly understood, below in conjunction with
Accompanying drawings and embodiments, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein only to
Explain the present invention, be not intended to limit the present invention.
In the description of the present invention, it is necessary to which explanation, term "front", "rear" and " on ", " under " are to be based on the small flow
The specifically used custom of liquid nitrogen cryogenics regulating valve determines, is for only for ease of the description present invention and simplifies description, rather than instruction
Or infer device or element and must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to this
The limitation of invention.
The present invention provides a kind of the low temperature electric control valve and adjusting method of preload adjustable, and volume structure is small, applicable
It in cryogenic media, can ensure the accurate realization of seal preload during valve cut-off, prevent pretightning force excessive and pretightning force is insufficient,
Spool abrasion is effectively reduced on the premise of meeting that leakage requires, improves the service life of valve.
With reference to figure 1, the low temperature electric control valve of preload adjustable, including：Valve body structure, pretightning force adjustment structure and driving
Mechanism.Valve body structure, pretightning force adjustment structure and driving mechanism are discussed in detail separately below：
(1) pretightning force adjustment structure
Pretightning force adjustment structure includes：Elastic component mounting base 16, elastic component 19, push rod briquetting 15, push rod 10,14 and of case
Baffle 13；
The bottom of case 14 is provided with threaded openings；The top of valve rod 17 and the fixed company of threaded openings sealing of case 14
Connect；The bottom of valve rod 17 and the opening of valve body 26 are sealedly and fixedly connected；Gear is fixedly mounted above the threaded openings of case 14
Plate 13；The inner cavity chamber of baffle 13 and valve rod 17 forms moving chambers；The top of push rod 10 is located at the inside of case 14, and with driving
Mechanism connects, and when driving mechanism is screw sliding block, push rod is connected with sliding block by 12 screw of push rod connector, easy to assembly, by force
Degree is reliable, service life length.The bottom of push rod 10 is extended in moving chambers through baffle 13；The bottom of push rod 10 has platform
Scalariform protuberance；The inside of elastic component mounting base 16 has the chamber for being used for placing elastic component 19, wherein, elastic component can use bullet
Spring, can be compressed in advance as requested, and precompression can be set, general to select the pretightning force to match with sealing material, need to be stayed
Certain surplus.Face contacts between elastic component 19 and push rod 17, in closing process, the bullet before thrust is not up to elastic component precompression
Property part does not deform upon.The top of elastic component mounting base 16 is threadedly coupled to form mass motion component with push rod briquetting 15；Also,
Mass motion component offers the step-like groove to match with step-like protuberance；Mass motion component passes through step-like groove
And hang on the step-like protuberance of push rod 10, at this time, the elastic component 19 inside elastic component mounting base 16 is located at push rod
10 underface, elastic component 19 are initially compressive state, have pretightning force.
(2) valve body structure
Valve body structure includes valve body 26, valve seat 25, inlet 30, liquid outlet 31, valve rod 17 and spool 18.
Valve body 26 is arranged at the lower section of valve rod 17, is connected and fixed by clamp nut 22 between valve rod 17 and valve body 26；Valve
Body 26 has inlet 30 and liquid outlet 31；The inlet 30 and liquid outlet 31 of valve body 26 are respectively designed with the card being connected with pipeline
Set 27.
There is valve seat 25 in the inside of valve body 26；The leading portion fixed spool leading portion sealing material 24 of spool 18, spool leading portion
Sealing material uses low temperature resistant material, and material can be PTFE, PCTFE etc..The back segment portion of spool 18 and elastic component mounting base 16
Bottom be fixedly connected, in practical application, the back segment portion of spool 18 and the bottom of elastic component mounting base 16 pass through elastic pin shaft 20
It is fixedly connected.When push rod 10 carries out first motion downwards under the driving effect of driving mechanism, drive elastic component mounting base 16,
The entirety that push rod briquetting 15 and elastic component 19 are formed moves downward；And when elastic component mounting base 16 moves downward, promote spool
18 move to the position close to valve seat 25；When the spool leading portion sealing material 24 of spool 18 is contacted with valve seat 25, feed liquor is cut off
Mouth 30 arrives the path of liquid outlet 31, and valve is closed.
In the present invention, the advantages of contact surface between valve seat 25 and spool 18 is sealed using bellows 21, sylphon seal
For：The heat exchange of cryogenic media and external structure can effectively be completely cut off, can generally use welding bellows form, ensured low
The using effect of warm medium.The stage casing of spool 18 and 21 welded seal of bellows.Using sealing between valve seat 25 and bellows 21
Gasket 23 seals, and gasket seal 23 can use silver-plated 316 stainless steel gasket.
(3) driving mechanism
Driving mechanism is used for driving push rod 10 and carries out straight line elevating movement；
Driving mechanism includes：It is motor 2, encoder 1, gear reducer 3, ball screw 7, sliding block 11, line slideway 28, lower close
Switch 9 and upper close switch 29；
The output terminal of motor 2 is linked by gear reducer 3 and ball screw 7；Added with gear reducer between ball screw and motor,
Miniature gears case is selected to produce high torque (HT) in motor low velocity, motor-speed reducer combination will bring the efficiency of higher, and
And it is a kind of solution with economic benefit.Motor selects brushed DC iron-core less motor：Low rotor inertia, slotless,
Low friction and exchange system closely, these advantages by bring faster acceleration, higher efficiency, reduce volume,
Alleviate weight and reduce caloric value.
Ball screw 7 assembles sliding block 11 above, and motor 2 drives 7 rotational motion of ball screw, and then is converted into sliding block 11
Linear motion；Line slideway 28 is installed in the glide direction of sliding block 11, sliding block 11 is moved along line slideway 28；Encoder 1 is used
In the rotational angle of measurement motor 2, and then the displacement of sliding block 11 can be converted into；Coder structure is compact, has high-resolution, energy
Enough complete high dynamic performances for keeping motor.
In the restraining position up and down of sliding block 11, respectively install close to switch 29 and lower close switch 9.Switch is positioned proximate to make
With for：When valve is opened or is closed and when encoder operational failure, spool and ripple can effectively ensure that
Pipe is unlikely to be subject to crushing or draws bad.
Driving mechanism further includes：Axle sleeve 4, bearing 5, the support of bearing 6 and limited block 8；Ball screw 7 is by axle sleeve 4 with subtracting
Fast machine 3 connects；Ball screw 7 is installed on bearing 5, and bearing 5 is fixed on the inside of case 14 by the support of bearing 6, passes through axis
5 are held, 7 side direction perturbation of ball screw is reduced, realizes accurate Bit andits control.In the side arrangement limited block 8 of sliding block 11.
In order to ensure that low temperature and moisture environment performs the reliability of component, axle sleeve 4, bearing 5, the support of bearing 6, ball screw
7th, the outside such as limited block 8, close switch 9, push rod 10, line slideway 11 is provided with protection case 14, also with water proof and dust proof
Effect.
The present invention also provides a kind of adjusting method of the low temperature electric control valve based on preload adjustable, including following step
Suddenly：
Step 1, it is generally the case that valve is opened or the stroke of closure is 3~5mm.During original state, spool 18 is located at
Fully open position point, at this time, elastic component 19 are spacing by elastic component mounting base 16 and push rod 10, in compressive state, bullet
Property 19 preload pressure of part is F0；
Step 2, valve closes the first stage：When needing to close valve, start motor 2, motor 2 starts to rotate, and encodes
Device 1 records the rotational angle of motor 2 in real time；Motor 2 reduces rotating speed by gear reducer 3 to improve moment of torsion by a certain percentage, and then
Driving ball screw 7 rotates；The linear motion for being changed into sliding block 11 of ball screw 7；When sliding block 11 carries out downwards straight line
During movement, push rod 10 is promoted to move along a straight line downwards, so as to drive the elastic component mounting base 16 hung on push rod 10, push rod briquetting
15 and elastic component 19 formed entirety move downward；And when elastic component mounting base 16 moves downward, spool 18 is promoted to close
The position movement of valve seat 25；When spool 18 moves to closed position point, the spool leading portion sealing material 24 and valve seat of spool 18
25 just contact, so as to cut off the path that inlet 30 arrives liquid outlet 31, valve is closed；At this time, elastic component 19 and initial compression
State is identical, does not deform upon further；Sealing force between valve seat and valve core sealed cover is 0；During in the first stage,
Data are recorded by encoder 1, are converted into the linear motion distance of spool 18, the move distance of spool 18 in the first stage, which is equal to, to be pushed away
The move distance of bar 10 in the first stage, L1 is denoted as by the move distance of push rod 10 in the first stage；
Step 3, valve closes second stage：The position of elastic component mounting base 16 and spool 18 remains unchanged, and push rod 10 exists
Continue to produce thrust under the driving effect of motor 2, at this time, deformation takes place in the spool leading portion sealing material 24 of spool 18, production
Raw reaction force, when 10 thrust of push rod is more than the preload pressure of elastic component 19, elastic component 19 starts to deform, and elastic component 19 exists
The deflection of second stage is equal to move distance of the push rod 10 in second stage；And push rod 10 is in the move distance of second stage
The total move distance of push rod that encoder detects subtracts L1；
The preload pressure for being equal to elastic component 19 due to the sealing force between valve seat and valve core sealed cover is existed plus elastic component 19
The elastic force that second stage deformation produces；So the sealing force between valve seat and valve core sealed cover can detect to obtain；When valve seat and valve
When sealing force between core sealing surface reaches requirement, motor 2 stops operating, and valve is in cut-off state at this time；
In the present invention, face contacts between elastic component and push rod, and elastic component is not before thrust is not up to elastic component precompression
Deform upon.Only when thrust reaches elastic component precompression, elastic component just deforms upon.
Step 4, when wanting Open valve, motor 2 is started, motor 2 starts to rotate backward, and encoder 1 records motor 2 in real time
Rotational angle；Motor 2 reduces rotating speed by gear reducer 3 to improve moment of torsion by a certain percentage, and then drives 7 turns of ball screw
It is dynamic；The linear motion for being changed into sliding block 11 of ball screw 7；When sliding block 11 is moved along a straight line upwards, push rod is pulled
10 move along a straight line upwards, and elastic component 19 and spool leading portion sealing material 24 start to recover deformation, when elastic component 19 returns to
During original state, the entirety that the drive elastic component of push rod 10 mounting base 16, push rod briquetting 15 and elastic component 19 are formed up transport by straight line
It is dynamic；And when elastic component mounting base 16 is moved upwards, direct pull spool 18 is away from valve seat 25, until spool 18 moves to completely
Open position point, motor 2 stop operating, and valve is in fully open state at this time.
The low temperature electric control valve and adjusting method of preload adjustable provided by the invention have the following advantages：
(1) in valve closing process, simple and quick sealing force size between spool and valve seat can be accurately detected,
So that the sealing force control between spool and valve seat is in required scope, it is changed to adjustable by regulating valve pretightning force is non-adjustable, makes valve
It is more reasonable that the pretightning force that seat and valve core sealed cover fit closely is adjusted, and prevents pretightning force excessive and pretightning force is insufficient, meeting
Leakage effectively reduces spool abrasion on the premise of requiring, and improves the service life of valve；
(2) in valve closing process, since elastic component has initial pretightning force, can accelerate spool and valve seat it
Between sealing force reach the speed of desirable value, accelerate valve closing velocity；
(3) the initial pretightning force of elastic component adjusts, flexible and convenient to use.
(4) by setting corrugated tube sealing structure, the electricity that cryogenic media cold is transmitted to top half has effectively been completely cut off
Gas executive component, uses suitable for low temperature；
(5) design structure is advanced, reasonable, effectively reduces the size of valve entirety.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also should
Depending on protection scope of the present invention.
Claims (9)
- A kind of 1. low temperature electric control valve of preload adjustable, it is characterised in that including：Valve body structure, pretightning force adjustment structure And driving mechanism；The valve body structure includes valve body (26), valve seat (25), inlet (30), liquid outlet (31), valve rod (17) and spool (18)；The pretightning force adjustment structure includes：Elastic component mounting base (16), elastic component (19), push rod briquetting (15), push rod (10), Case (14) and baffle (13)；The driving mechanism is used to drive the push rod (10) to carry out straight line elevating movement；Wherein, the driving mechanism is installed on the case (14) above；The bottom of the case (14) is provided with threaded openings； The top of the valve rod (17) and the threaded openings of the case (14) are sealedly and fixedly connected；The bottom of the valve rod (17) and institute The opening for stating valve body (26) is sealedly and fixedly connected；The baffle is fixedly mounted above the threaded openings of the case (14) (13)；The inner cavity chamber of the baffle (13) and the valve rod (17) forms moving chambers；The top of the push rod (10) is located at institute The inside of case (14) is stated, and is connected with the driving mechanism；Prolong through the baffle (13) bottom of the push rod (10) Reach in the moving chambers；The bottom of the push rod (10) has step-like protuberance；The elastic component mounting base (16) Inside has the chamber for being used for placing the elastic component (19)；The top of the elastic component mounting base (16) and the push rod briquetting (15) it is threadedly coupled and forms mass motion component；Also, the mass motion component offers and the step-like protuberance phase Matched step-like groove；The mass motion component hangs on the step of the push rod (10) by the step-like groove On shape protuberance, at this time, the elastic component (19) internal positioned at the elastic component mounting base (16) is located at the push rod (10) Underface, the elastic component (19) is initially compressive state, has pretightning force；The valve body (26) is arranged at the lower section of the valve rod (17)；The valve body (26) has the inlet (30) and described Liquid outlet (31)；The inside of the valve body (26) has the valve seat (25)；The leading portion of the spool (18) fixes the spool Leading portion sealing material (24)；The back segment portion of the spool (18) is fixedly connected with the bottom of the elastic component mounting base (16)；When When the push rod (10) carries out downwards first motion under the driving effect of the driving mechanism, the elastic component mounting base is driven (16), the entirety that the push rod briquetting (15) and the elastic component (19) are formed moves downward；And work as the elastic component mounting base (16) when moving downward, the spool (18) is promoted to be moved to the position close to the valve seat (25)；When the spool (18) When spool leading portion sealing material (24) is contacted with the valve seat (25), the inlet (30) is cut off to the liquid outlet (31) Path, valve are closed.
- 2. the low temperature electric control valve of preload adjustable according to claim 1, it is characterised in that the valve body (26) Inlet (30) and liquid outlet (31) are respectively designed with the cutting ferrule (27) being connected with pipeline.
- 3. the low temperature electric control valve of preload adjustable according to claim 1, it is characterised in that the spool (18) Back segment portion is fixedly connected with the bottom of the elastic component mounting base (16) by elastic pin shaft (20).
- 4. the low temperature electric control valve of preload adjustable according to claim 1, it is characterised in that the valve seat (25) and Contact surface between the spool (18) is sealed using bellows (21)；The stage casing of the spool (18) and the bellows (21) Welded seal.
- 5. the low temperature electric control valve of preload adjustable according to claim 4, it is characterised in that the valve seat (25) and Sealed between the bellows (21) using gasket seal (23).
- 6. the low temperature electric control valve of preload adjustable according to claim 1, it is characterised in that the valve rod (17) and Connected and fixed by clamp nut (22) between the valve body (26).
- 7. the low temperature electric control valve of preload adjustable according to claim 1, it is characterised in that the driving mechanism bag Include：Motor (2), encoder (1), gear reducer (3), ball screw (7), sliding block (11), line slideway (28), lower close switch (9) it is and upper close to switch (29)；The output terminal of the motor (2) is linked by the gear reducer (3) and the ball screw (7), the ball screw (7) The sliding block (11) is assembled above, and the motor (2) drives ball screw (7) rotational motion, and then is converted into the cunning The linear motion of block (11)；The line slideway (28) is installed in the glide direction of the sliding block (11), makes the sliding block (11) Moved along the line slideway (28)；The encoder (1) is used for the rotational angle for measuring the motor (2), and then can convert For the displacement of the sliding block (11)；In the restraining position up and down of the sliding block (11), respectively install described upper close to switch (29) and described lower close to switch (9).
- 8. the low temperature electric control valve of preload adjustable according to claim 7, it is characterised in that the driving mechanism is also Including：Axle sleeve (4), bearing (5), the support of bearing (6) and limited block (8)；The ball screw (7) is connected by the axle sleeve (4) with the gear reducer (3)；The ball screw (7) is installed on institute State on bearing (5), the bearing (5) is fixed on the inside of the case (14) by the support of bearing (6), passes through the axis (5) are held, reduce the ball screw (7) side direction perturbation；Limited block (8) described in side arrangement in the sliding block (11).
- A kind of 9. adjusting method of the low temperature electric control valve of the preload adjustable based on described in claim 1, it is characterised in that Comprise the following steps：Step 1, during original state, spool (18) is located at fully open position point, and at this time, elastic component (19) is installed by elastic component Seat (16) and push rod (10) it is spacing, in compressive state, elastic component (19) preload pressure is F0；Step 2, valve closes the first stage：When needing to close valve, start motor (2), motor (2) starts to rotate, and encodes Device (1) records the rotational angle of motor (2) in real time；Motor (2) is reduced rotating speed by gear reducer (3) and is turned round to improve by a certain percentage Square, and then drive ball screw (7) to rotate；The rotation of ball screw (7) is changed into the linear motion of sliding block (11)；Work as sliding block (11) when being moved along a straight line downwards, push rod (10) is promoted to move along a straight line downwards, so as to drive the bullet hung on push rod (10) Property part mounting base (16), the entirety that is formed of push rod briquetting (15) and elastic component (19) moves downward；And when the elastic component is installed When seat (16) moves downward, spool (18) is promoted to be moved to the position close to valve seat (25)；When spool (18) moves to close stance When putting, the spool leading portion sealing material (24) of spool (18) has just been contacted with valve seat (25), is arrived so as to cut off inlet (30) The path of liquid outlet (31), valve are closed；At this time, elastic component (19) is identical with initial compressed state, valve seat and valve core sealed cover Between sealing force be 0；During in the first stage, data are recorded by encoder (1), are converted into spool (18) linear motion Distance, the move distance of spool (18) in the first stage is equal to the move distance of push rod (10) in the first stage, by push rod (10) Move distance in the first stage is denoted as L1；Step 3, valve closes second stage：The position of elastic component mounting base (16) and spool (18) remains unchanged, the push rod (10) continue to produce thrust under the driving effect of motor (2), at this time, the spool leading portion sealing material (24) of spool (18) starts Deform upon, produce reaction force, when push rod (10) thrust is more than the preload pressure of elastic component (19), elastic component (19) is opened Begin to deform, elastic component (19) is equal to move distance of the push rod (10) in second stage in the deflection of second stage；And push rod (10) in the move distance of second stage L1 is subtracted for the total move distance of push rod that encoder detects；The preload pressure for being equal to elastic component (19) due to the sealing force between valve seat and valve core sealed cover is existed plus elastic component (19) The elastic force that second stage deformation produces；So the sealing force between valve seat and valve core sealed cover can detect to obtain；When valve seat and valve When sealing force between core sealing surface reaches requirement, motor (2) stops operating, and valve is in cut-off state at this time；Step 4, when wanting Open valve, motor (2) is started, motor (2) starts to rotate backward, and record is electric in real time for encoder (1) The rotational angle of machine (2)；Motor (2) reduces rotating speed by gear reducer (3) to improve moment of torsion by a certain percentage, and then drives ball Screw (7) rotates；The rotation of ball screw (7) is changed into the linear motion of sliding block (11)；When sliding block (11) carries out straight line upwards During movement, push rod (10) is pulled to move along a straight line upwards, elastic component (19) and spool leading portion sealing material (24) start to recover Deformation, when elastic component (19) returns to original state, push rod (10) drive elastic component mounting base (16), push rod briquetting (15) and The entirety that elastic component (19) is formed up moves along a straight line；And when elastic component mounting base (16) is moved upwards, direct pull spool (18) away from valve seat (25), until spool (18) moves to fully open position point, motor (2) stops operating, at this time at valve In fully open state.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211387513.3A CN115638252A (en) | 2017-12-21 | 2017-12-21 | Low-temperature electric regulating valve with adjustable pretightening force and regulating method |
| CN201711394676.3A CN107939981B (en) | 2017-12-21 | 2017-12-21 | Low-temperature electric regulating valve with adjustable pretightening force and regulating method |
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| CN201711394676.3A CN107939981B (en) | 2017-12-21 | 2017-12-21 | Low-temperature electric regulating valve with adjustable pretightening force and regulating method |
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| CN202211387513.3A Division CN115638252A (en) | 2017-12-21 | 2017-12-21 | Low-temperature electric regulating valve with adjustable pretightening force and regulating method |
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| CN201711394676.3A Active CN107939981B (en) | 2017-12-21 | 2017-12-21 | Low-temperature electric regulating valve with adjustable pretightening force and regulating method |
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| CN108999983A (en) * | 2018-08-03 | 2018-12-14 | 海杰亚（北京）医疗器械有限公司 | A kind of flow control valve |
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| CN110345303A (en) * | 2019-07-05 | 2019-10-18 | 广东金力变速科技股份有限公司 | A kind of valve stop method |
| EP3617572A4 (en) * | 2018-04-24 | 2020-08-19 | Neway Valve (Suzhou) Co., Ltd | Actuating system for use in driving valve to open and close |
| CN117167493A (en) * | 2023-11-03 | 2023-12-05 | 华英阀业有限公司 | Valve assembly based on valve rod and use method thereof |
| EP4067712A4 (en) * | 2019-11-25 | 2023-12-27 | M-System Co.,Ltd | Actuator and fluid control device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117167493B (en) * | 2023-11-03 | 2024-03-08 | 华英阀业有限公司 | Valve assembly based on valve rod and use method thereof |
Also Published As
| Publication number | Publication date |
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| CN115638252A (en) | 2023-01-24 |
| CN107939981B (en) | 2023-12-22 |
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