CN106884991B - A kind of band scraper shut-off valve - Google Patents
A kind of band scraper shut-off valve Download PDFInfo
- Publication number
- CN106884991B CN106884991B CN201710225502.8A CN201710225502A CN106884991B CN 106884991 B CN106884991 B CN 106884991B CN 201710225502 A CN201710225502 A CN 201710225502A CN 106884991 B CN106884991 B CN 106884991B
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- valve
- valve stem
- flap
- positioning pin
- seat
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- 238000007789 sealing Methods 0.000 claims abstract description 80
- 238000000429 assembly Methods 0.000 claims abstract description 45
- 230000000712 assembly Effects 0.000 claims abstract description 45
- 239000000463 material Substances 0.000 claims abstract description 5
- 239000007787 solid Substances 0.000 claims abstract description 5
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 238000007790 scraping Methods 0.000 claims description 17
- 239000000945 filler Substances 0.000 claims description 11
- 210000004907 gland Anatomy 0.000 claims description 10
- 241001235022 Aplysia punctata Species 0.000 claims description 5
- 239000002245 particle Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 8
- 238000002474 experimental method Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012797 qualification 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/10—Cleaning by methods involving the use of tools characterised by the type of cleaning tool
- B08B1/16—Rigid blades, e.g. scrapers; Flexible blades, e.g. wipers
- B08B1/165—Scrapers
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Abstract
The present invention relates to a kind of band scraper shut-off valves, it is characterised in that：Outer stem internal is equipped with inner valve stem, inner valve stem lower end penetrates outer valve rod lower face, lower section is stretched in flap lower face, inner valve stem lower end is fixed with doctor assemblies and chock plug, doctor assemblies are mounted between valve clack sealing surface and chock plug, chock plug forms for nonmetallic materials, and chock plug outer circle can form sealing between valve base cavity wall；Inner valve stem upper end penetrates outer valve rod upper surface, inner valve stem top is equipped with the lateral anti-rotation groove for penetrating inner valve stem, positioning pin and compressed spring are equipped in the anti-rotation groove, when the valve use is containing solid particle, and when the operating modes such as sticking medium of tool, it is not easy to be sticked on sealing pair with medium, the advantages of good airproof performance, long lifespan.
Description
Technical field
The present invention relates to a kind of shut-off valves, more particularly, to a kind of band scraper shut-off valve.
Background technology
Shut-off valve is used as one kind is extremely important to block class valve, and sealing is by applying torque to valve rod, and valve rod exists
On axial direction to flap apply pressure, so that valve clack sealing surface is fitted closely with sealing surface of seat, prevention medium along sealing surface it
Between slot leakage, the sealing pair of shut-off valve is made of valve clack sealing surface and sealing surface of seat, and valve rod drives flap along valve seat
Center line is vertically moved, its shortcoming is that：When traditional shut-off valve is used in the ore pulp with viscosity and containing solid particle
When equal media, medium is easily sticked on sealing pair, causes valve clack sealing surface that can not closely be combined with sealing surface of seat, to produce
Raw leakage, while the solid particle contained in medium is clipped on sealing pair, is easily destroyed sealing pair, service life is short.
Invention content
In view of the deficiencies in the prior art, a kind of use of present invention offer is containing solid particle, and with viscosity
The operating modes such as medium when, medium is not easy to be sticked on sealing pair, good airproof performance, long lifespan band scraper shut-off valve.
The present invention realizes by following technical solution：
A kind of band scraper shut-off valve includes:Valve body, valve seat, outer valve rod, flap and valve deck, valve inner are equipped with inlet flow
Road, outlet flow and lumen, outlet flow are communicated with lumen, and valve seat setting is equipped with valve in inlet channel outlet end, valve seat upper end
Seat sealing surface, valve seat are equipped with inner cavity, and valve deck is fixedly mounted on upper end in the middle part of valve body, stuffing-box is equipped in the middle part of valve deck, in the filler
Filler and gland are installed, gland compresses downwards filler at letter, it is characterised in that：Valve deck top is equipped with headkerchief,
It is equipped with groove in the headkerchief, is equipped with valve stem nut and stop collar in the groove, stop collar is threadably secured mounted on groove
Upper end, and limit valve stem nut and move up and down, valve stem nut is internally provided with trapezoidal thread, and valve stem nut top is equipped with big hand
Wheel, outer valve rod lower end penetrate stuffing-box and stretch into lumen, are equipped with flap and flap seat in lumen, flap is fixedly mounted by flap seat
In outer valve rod lower end, flap lower face is equipped with the valve clack sealing surface that sealing can be formed with sealing surface of seat, in the flap lower face
Place is equipped with centered on flap axis, and at the link stopper of aplysia punctata, outer valve rod upper end penetrates inside valve stem nut, stretches to top, outside
Valve rod top outer circle be equipped with the matched screw thread of trapezoidal thread inside valve stem nut, outer stem internal be equipped with inner valve stem, it is interior
Valve rod lower end penetrates outer valve rod lower face, lower section is stretched in flap lower face, and inner valve stem lower end is fixed with doctor assemblies and chock plug,
Doctor assemblies are mounted between valve clack sealing surface and chock plug, and chock plug forms for nonmetallic materials, and chock plug outer circle can be with valve base cavity
Sealing is formed between wall；Inner valve stem upper end penetrates outer valve rod upper surface, and inner valve stem top is equipped with the anti-of the transverse direction for penetrating inner valve stem
Turn trough, the anti-rotation groove is interior to be equipped with positioning pin and compressed spring, and positioning pin stretches out internal valve respectively at lateral setting, the both ends of positioning pin
Bar outer circle, compressed spring are arranged between positioning pin and anti-rotation groove upper surface, are equipped in outer valve rod upper end multigroup symmetrical
Card slot, valve rod axis is circumferentially distributed at center other than the card slot, and positioning pin is under the thrust of compressed spring, the two of positioning pin
End can enter the card slot, and two sides edge upper end of anti-rotation groove is respectively equipped with a concave mouth, and two concave mouths are with internal valve
It is symmetrically distributed centered on rod axis, positioning pin is moved up and rotated a certain angle, and can be caught in two concave mouths, in inner valve stem
End is fixed with small handwheel；It is equipped with guide groove in valve body middle chamber wall portion, outer stem lower portion is fixed with lateral guiding axis, this is led
It is stretched into guide groove to one end of axis.
Further, the doctor assemblies include cutter head and knife tail, and knife tail is fixed in inner valve stem, and cutter head front is equipped with
Upper and lower scraping blade, upper scraping blade can carry out plane contact with valve clack sealing surface, and lower scraping blade can carry out plane contact with sealing surface of seat,
It is attached with axis pin between cutter head rear portion and knife tail, cutter head rear portion is also fixed with brace, the folder between the brace and cutter head
Between angle is 120 ° -150 °, brace head is arc-shaped structure, and cutter head is additionally provided with retaining plate with knife tail junction, the retaining plate
Mounted on the back side of brace.
Further, the blade is made of cemented carbide material.
A kind of band scraper shut-off valve assembly method of the present invention, its step are as follows：
A. each parts are cleaned with clear water, hair-dryer is used in combination to dry up；
B. the assembling of valve body and valve seat：Valve body heating is caused 200~250 DEG C, the inlet flow that valve seat is packed into valve body is said
Mouthful end keeps valve base sealing face-up, then the component of natural cooling valve body and valve seat in air；
C. the assembling of the parts such as outer valve rod and flap：The flap back side is stretched into outer valve rod lower end, and flap seat is packed into the flap back side,
And fixed outer valve rod, link stopper at the flap lower face that is fixedly mounted on of aplysia punctata centered on flap axis, guiding axis at
Lateral is fixed on outer stem lower portion；
D. the assembling of the parts such as inner valve stem, doctor assemblies and chock plug：Doctor assemblies and chock plug are fixedly mounted on inner valve stem
Lower end, chock plug is mounted in the lower section of doctor assemblies, and abuts doctor assemblies；
E. the component that serial number c is completed is assembled with the serial number d components completed：Inner valve stem upper end penetrates valve successively
Valve, outer valve rod endoporus stretch to top, and doctor assemblies is made to abut valve clack sealing surface, rotate inner valve stem, drive doctor assemblies rotation, make
The cutter head of doctor assemblies is moved away from valve clack sealing surface, and positioning pin and compressed spring are installed successively at the anti-rotation groove of inner valve stem upper end, fixed
Position pin stretches out inner valve stem outer circle respectively at lateral setting, the both ends of positioning pin, and compressed spring setting is on positioning pin and anti-rotation groove
Between end face, for positioning pin under the thrust of compressed spring, the both ends of positioning pin enter the card slot of outer valve rod upper end；
F. the assembling of bonnet assemblies and overall package：The lower that serial number e is completed is packed into the lumen position of valve body, protects
It holds valve clack sealing surface to be combined with sealing surface of seat, guiding axis is kept to stretch into guide groove, at the stuffing-box in the middle part of valve deck, according to
It is secondary to be put into 4~6 fillers and gland, the bonnet assemblies that slow promotion group installs to inner valve stem and outer valve rod just on
Side, then remove the positioning pin at the anti-rotation groove of inner valve stem upper end, then slowly put down bonnet assemblies, make inner valve stem upper end and
The upper end of outer valve rod penetrates valve deck stuffing-box, filler, gland and headkerchief successively, until valve deck lower end is mutually tied with valve body upper end
It closes, fixed valve body and valve deck is used in combination；
G. the assembling of the parts such as valve stem nut, stop collar and big handwheel：Utilize trapezoidal thread and the outer valve in valve stem nut
The externally threaded cooperation on bar top, slow rotary valve rod nut move down, until valve stem nut lower end enters the groove in headkerchief
Bottom, is then threadably secured stop collar mounted on groove upper end, and big handwheel is fixedly mounted on valve stem nut top；
H. the assembling of the parts such as small handwheel：Positioning pin is reloaded at anti-rotation groove, small handwheel is fixedly mounted on internal valve
Bar top；
I. pressure testing：Hydraulic pressure strength experiment, pressurized seal experiment are carried out successively；
J. a kind of band scraper shut-off valve of pass the test is dried up, then japanning, lead sealing, storage.
Further, in the step d doctor assemblies assembly method：Knife tail is fixed on inner valve stem lower end, scrapes above and below
Piece is fixedly mounted on cutter head front, is attached with axis pin between cutter head rear portion and knife tail, and brace is fixedly mounted on cutter head rear portion,
Keep the angle between brace and cutter head between 120 ° -150 °, retaining plate is mounted on cutter head and knife tail junction, keeps retaining
Plate is mounted on the back side of brace.
A kind of band scraper shut-off valve application method of the present invention, its step are as follows：
1. from off state to open state：Big handwheel is rotated clockwise, drives valve stem nut rotation, then drive outer valve
The parts such as bar, inner valve stem, flap, doctor assemblies and chock plug move up, valve opening；
2. from open state to closed state：Positioning pin is lifted up to concave mouth position, rotational positioning pin is until positioning
Pin both ends are respectively clamped into concave mouth, rotate clockwise small handwheel, drive inner valve stem and doctor assemblies rotation, move outside cutter head, above scrape
Piece moves at valve clack sealing surface, and lower scraping blade moves to right over sealing surface of seat；Big handwheel is rotated outside inverse time, drives valve stem nut rotation
Turn, then the parts such as outer valve rod, inner valve stem, flap, doctor assemblies and chock plug is driven to move down, until lower scraping blade contacts valve base sealing
Face, stop rotating outer valve rod；Continue to rotate clockwise the circle of small handwheel one, another mistake hour hands rotate small handwheel, until brace head connects
Link stopper is touched, and continues rotation small handwheel counterclockwise, is moved in band dynamic cutter head, upper and lower scraping blade is moved away from valve clack sealing surface and valve seat respectively
Sealing surface, stop rotating small handwheel；Negative direction rotational positioning pin, positioning pin are moved away from concave mouth, work of the positioning pin in compressed spring
It is moved down under, and positioning pin both ends is made to be caught in card slot again；Continuation rotates big handwheel counterclockwise, drives outer valve rod, internal valve
The parts such as bar, flap, doctor assemblies and chock plug move down, until valve clack sealing surface compresses sealing surface of seat, valve is closed.
The advantage of the invention is that：The design of doctor assemblies, can effectively strike off that be adhered to valve clack sealing surface close with valve seat
Medium on cover, when valve is closed, it is not easy to destroy sealing pair, while valve clack sealing surface and sealing surface of seat are tighter
Close combination has the advantages that good airproof performance, with long service life；The setting of chock plug, makes doctor assemblies on striking off sealing pair
When medium, medium is prevented to be adhered on sealing pair again, having further prevents valve clack sealing surface viscous with sealing surface of seat
The advantages of attached medium；The setting of inner valve stem and outer valve rod has the rotation for preferably freely controlling scraper, scraper is made preferably to scrape
Except the medium being adhered on sealing pair；The setting of positioning pin and compressed spring, better free switching inner valve stem and outer valve rod
Movement, have prevent due to inner valve stem with do not switch well when outer stem movement, lead to stuck advantage；Doctor assemblies packet
Include cutter head and knife tail, be attached with axis pin between cutter head rear portion and knife tail, cutter head rear portion is also fixed with guide rod, the guide rod with
Between angle between cutter head is 120 ° -150 °, doctor assemblies rotation is driven in control inner valve stem, has struck off and has been adhered to sealing pair
On medium when, band dynamic cutter head remove sealing pair, have prevent cutter head to be stuck between valve clack sealing surface and sealing surface of seat, prevent
The advantages of sealing pair can not seal；This assembly method has the advantages that easy for installation, accurate, qualification rate is high；This valve application method
Simply, conveniently, keep sealing surface it is frayed less, enhancing life of valve.
Description of the drawings
Fig. 1 is a kind of open state structural schematic diagram with scraper shut-off valve of the present invention.
Fig. 2 is a kind of closed state structural schematic diagram with scraper shut-off valve of the present invention.
Fig. 3 is a kind of enlarged diagram of the doctor assemblies with scraper shut-off valve and valve clack sealing surface upward view of the present invention.
Specific implementation mode：
According to Fig. 1, Fig. 2 and Fig. 3 it is found that a kind of band scraper shut-off valve of the present invention includes：Valve body 1, valve seat 2, outer valve rod 7,
Flap 5 and valve deck 9, valve body 1 are internally provided with inlet channel, outlet flow and lumen, and outlet flow is communicated with lumen, and valve seat 2 is set
It sets in inlet channel outlet end, 2 upper end of valve seat is equipped with sealing surface of seat, and valve seat 2 is equipped with inner cavity, and valve deck 9 is fixedly mounted on valve body 1
Middle part upper end, 9 middle part of valve deck are equipped with stuffing-box, filler 10 and gland 11, gland 11 are equipped at the stuffing-box
Filler 10 is compressed downwards, and 9 top of valve deck is equipped with headkerchief 12, and groove is equipped in the headkerchief 12, and valve rod spiral shell is equipped in the groove
Mother 15 and stop collar 13, stop collar 13 are threadably secured mounted on groove upper end, and are limited valve stem nut 15 and moved up and down,
Valve stem nut 15 is internally provided with trapezoidal thread, and 15 top of valve stem nut is equipped with big handwheel 14, and 7 lower end of outer valve rod penetrates stuffing-box
Lumen is stretched into, flap 5 and flap seat 6 are equipped in lumen, flap 5 is fixedly mounted by flap seat 6 in 7 lower end of outer valve rod, flap 5
Lower face is equipped with the valve clack sealing surface that sealing can be formed with sealing surface of seat, is equipped with flap axis at 5 lower face of flap
Centered on, at the link stopper 23 of aplysia punctata, 7 upper end of outer valve rod penetrates inside valve stem nut 15, top is stretched to, outside 7 top of outer valve rod
Circle is equipped with is internally provided with inner valve stem 8 with the matched screw thread of trapezoidal thread inside valve stem nut 15, outer valve rod 7, under inner valve stem 8
End penetrates 7 lower face of outer valve rod, lower section is stretched in 5 lower face of flap, and 8 lower end of inner valve stem is fixed with doctor assemblies 4 and chock plug 3,
Doctor assemblies 4 are mounted between valve clack sealing surface and chock plug 3, and chock plug 3 forms for nonmetallic materials, and 3 outer circle of chock plug can be with valve seat
Sealing is formed between internal chamber wall；8 upper end of inner valve stem penetrates 7 upper surface of outer valve rod, and 8 top of inner valve stem is equipped with the cross for penetrating inner valve stem
To anti-rotation groove, be equipped with positioning pin 17 and compressed spring 18 in the anti-rotation groove, positioning pin 17 is at lateral setting, the two of positioning pin 17
8 outer circle of inner valve stem is stretched out at end respectively, and compressed spring 18 is arranged between positioning pin 17 and anti-rotation groove upper surface, on outer valve rod 7
End is equipped with multigroup symmetrical card slot, is circumferentially distributed centered on 7 axis of valve rod other than the card slot, positioning pin 17 is compressing
Under the thrust of spring 18, the both ends of positioning pin 17 can enter the card slot, and two sides edge upper end of anti-rotation groove is respectively equipped with one
A concave mouth, two concave mouths are symmetrically distributed with 8 axis of inner valve stem at center, and positioning pin 17 moves up and rotates certain angle
Degree, can be caught in two concave mouths, 8 upper end of inner valve stem is fixed with small handwheel 19；It is equipped with guide groove in 1 lumen wall portion of valve body,
7 lower part of outer valve rod is fixed with lateral guiding axis, and one end of the guiding axis is stretched into guide groove；The doctor assemblies 4 include
Cutter head 21 and knife tail 20, knife tail 20 are fixed in inner valve stem 8, and 21 front of cutter head is equipped with upper and lower scraping blade, and upper scraping blade can be close with flap
Cover carries out plane contact, and lower scraping blade can carry out plane contact with sealing surface of seat, axis pin is used between 21 rear portion of cutter head and knife tail
It being attached, cutter head rear portion is also fixed with brace 22, between the angle between the brace 22 and cutter head 21 is 120 ° -150 °,
22 head of brace is arc-shaped structure, and cutter head 21 is additionally provided with retaining plate with 20 junction of knife tail, which is mounted on brace 22
The back side.
A kind of band scraper shut-off valve assembly method of the present invention, its step are as follows：
A. each parts are cleaned with clear water, hair-dryer is used in combination to dry up；
B. the assembling of valve body 1 and valve seat 2：The heating of valve body 1 is caused 200~250 DEG C, valve seat 2 is packed into the inlet flow of valve body 1
Road outlet end keeps valve base sealing face-up, then the component of natural cooling valve body 1 and valve seat 2 in air；
C. the assembly of the parts such as outer valve rod 7 and flap 5：5 back side of flap is stretched into 7 lower end of outer valve rod, and flap seat 6 is packed into flap
Link stopper 23, is fixedly mounted on 5 lower end of flap by 5 back sides, and fixed outer valve rod 7 centered on 5 axis of flap at aplysia punctata
Face, guiding axis are fixed on 7 lower part of outer valve rod at lateral；
D. the assembling of the parts such as inner valve stem 8, doctor assemblies 4 and chock plug 3：By doctor assemblies 4 and chock plug 3 by being fixedly mounted on
8 lower end of inner valve stem, chock plug 3 is mounted in the lower section of doctor assemblies 4, and abuts doctor assemblies 4；
E. the component that serial number c is completed is assembled with the serial number d components completed：8 upper end of inner valve stem penetrates valve successively
Valve 5,7 endoporus of outer valve rod stretch to top, and doctor assemblies 4 is made to abut valve clack sealing surface, rotate inner valve stem 8, and doctor assemblies 4 is driven to revolve
Turn, so that the cutter head 21 of doctor assemblies 4 is moved away from valve clack sealing surface, 17 He of positioning pin is installed successively at 8 upper end anti-rotation groove of inner valve stem
Compressed spring 18, positioning pin 17 stretch out 8 outer circle of inner valve stem respectively at lateral setting, the both ends of positioning pin 17, and compressed spring 18 is set
Set between positioning pin 17 and anti-rotation groove upper surface, positioning pin 17 under the thrust of compressed spring 18, the both ends of positioning pin 17 into
Enter the card slot of 7 upper end of outer valve rod；
F. the assembling of bonnet assemblies and overall package：The lower that serial number e is completed is packed into the lumen position of valve body 1,
It keeps valve clack sealing surface to be combined with sealing surface of seat, guiding axis is kept to stretch into guide groove, the stuffing-box at 9 middle part of valve deck
Place, is sequentially placed into 4~6 fillers 10 and gland 11, bonnet assemblies that slow promotion group installs to inner valve stem 8 and outer
Then the surface of valve rod 7 removes the positioning pin 17 at 8 upper end anti-rotation groove of inner valve stem, then slowly puts down bonnet assemblies, make
The upper end of inner valve stem 8 and the upper end of outer valve rod 7 penetrate valve deck stuffing-box, filler 10, gland 11 and headkerchief 12 successively, until
9 lower end of valve deck is combined with 1 upper end of valve body, and fixed valve body 1 and valve deck 9；
G. the assembling of the parts such as valve stem nut 15, stop collar 13 and big handwheel 14：Utilize the trapezoidal spiral shell in valve stem nut 15
The externally threaded cooperation of line and 7 top of outer valve rod, slow rotary valve rod nut 15 move down, until 15 lower end of valve stem nut enters
Then bottom portion of groove in headkerchief is threadably secured stop collar 13 mounted on groove upper end, big handwheel 14 is fixedly mounted
On 15 top of valve stem nut；
H. the assembling of the parts such as small handwheel 19：Positioning pin 17 is reloaded at anti-rotation groove, small handwheel 19 is fixedly mounted
On inner valve stem top；
I. pressure testing：Hydraulic pressure strength experiment, pressurized seal experiment are carried out successively；
J. a kind of band scraper shut-off valve of pass the test is dried up, then japanning, lead sealing, storage.
Further, in the step d doctor assemblies 4 assemble method：Knife tail 20 is fixed on 8 lower end of inner valve stem, upper,
Lower scraping blade is fixedly mounted on 21 front of cutter head, is attached with axis pin between 21 rear portion of cutter head and knife tail 20, and brace 22 fixes peace
Mounted in 21 rear portion of cutter head, keep the angle between brace 22 and cutter head 22 between 120 ° -150 °, retaining plate is mounted on cutter head 21
With 20 junction of knife tail, retaining plate is kept to be mounted on the back side of brace 22.
A kind of band scraper shut-off valve application method of the present invention, its step are as follows：
1. from off state to open state：Big handwheel 14 is rotated clockwise, valve stem nut 15 is driven to rotate, then is driven outer
The parts such as valve rod 7, inner valve stem 8, flap 5, doctor assemblies 4 and chock plug 3 move up, valve opening；
2. from open state to closed state：Be lifted up positioning pin 17 arrive concave mouth position, rotational positioning pin 17 until
Positioning pin both ends are respectively clamped into concave mouth, rotate clockwise small handwheel 19, drive inner valve stem 8 and doctor assemblies 4 to rotate, cutter head 21
Outer shifting, upper scraping blade move at valve clack sealing surface, and lower scraping blade moves to right over sealing surface of seat；Big handwheel 19, band are rotated counterclockwise
Ovable valve stem nut 15 rotates, then the parts such as outer valve rod 7, inner valve stem 8, flap 5, doctor assemblies 4 and chock plug 3 is driven to move down, directly
Sealing surface of seat is contacted to lower scraping blade, stop rotating outer valve rod 7；Continue to rotate clockwise the circle of small handwheel 19 1, the rotation of another mistake hour hands
Turn small handwheel 19, until 22 head contact link stopper of brace, and continue rotation small handwheel 19 counterclockwise, it is moved in band dynamic cutter head 21, upper,
Lower scraping blade is moved away from valve clack sealing surface and sealing surface of seat respectively, and stop rotating small handwheel 19；Negative direction rotational positioning pin 17, positioning
Pin 17 is moved away from concave mouth, and positioning pin 17 moves down under the action of compressed spring 18, and 17 both ends of positioning pin is made to be caught in again
Card slot；Continuation rotates big handwheel 14 counterclockwise, drives outer valve rod 7, inner valve stem 8, flap 5, doctor assemblies 4 and chock plug 3 etc. zero
Part moves down, until valve clack sealing surface compresses sealing surface of seat, valve is closed.
In conclusion the above is merely preferred embodiments of the present invention, being not intended to limit the scope of the present invention.
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in the present invention's
Within protection domain.
Claims (1)
1. a kind of band scraper shut-off valve, including:Valve body, valve seat, outer valve rod, flap and valve deck, valve inner be equipped with inlet channel,
Outlet flow and lumen, outlet flow are communicated with lumen, and in inlet channel outlet end, it is close that valve seat upper end is equipped with valve seat for valve seat setting
Cover, valve seat are equipped with inner cavity, and valve deck is fixedly mounted on upper end in the middle part of valve body, stuffing-box is equipped in the middle part of valve deck, at the stuffing-box
Filler and gland are installed, gland compresses downwards filler, it is characterised in that：Valve deck top is equipped with headkerchief, in the lid
It is equipped with groove in head, valve stem nut and stop collar are equipped in the groove, stop collar is threadably secured mounted on groove upper end,
And limit valve stem nut and move up and down, valve stem nut is internally provided with trapezoidal thread, and valve stem nut top is equipped with big handwheel, outside
Valve rod lower end penetrates stuffing-box and stretches into lumen, and flap and flap seat are equipped in lumen, and flap is fixedly mounted outside by flap seat
Valve rod lower end, flap lower face are equipped with the valve clack sealing surface that can form sealing with sealing surface of seat, are set at the flap lower face
Have centered on flap axis, at the link stopper of aplysia punctata, outer valve rod upper end penetrates inside valve stem nut, stretches to top, outer valve rod
Top outer circle is equipped with is equipped with inner valve stem, inner valve stem with the matched screw thread of trapezoidal thread inside valve stem nut, outer stem internal
Lower end penetrates outer valve rod lower face, lower section is stretched in flap lower face, and inner valve stem lower end is fixed with doctor assemblies and chock plug, scraper
Component be mounted between valve clack sealing surface and chock plug, chock plug be nonmetallic materials composition, chock plug outer circle can with valve base cavity wall it
Between formed sealing；Inner valve stem upper end penetrates outer valve rod upper surface, and inner valve stem top is equipped with the lateral anti-rotation groove for penetrating inner valve stem,
Positioning pin and compressed spring are equipped in the anti-rotation groove, positioning pin stretches out outside inner valve stem respectively at lateral setting, the both ends of positioning pin
Circle, compressed spring are arranged between positioning pin and anti-rotation groove upper surface, and multigroup symmetrical card is equipped in outer valve rod upper end
Slot, valve rod axis is circumferentially distributed at center other than the card slot, and for positioning pin under the thrust of compressed spring, the both ends of positioning pin can
Into the card slot, two sides edge upper end of anti-rotation groove is respectively equipped with a concave mouth, stem shaft within two concave mouths
It is symmetrically distributed centered on line, positioning pin is moved up and rotated a certain angle, and can be caught in two concave mouths, and inner valve stem upper end is solid
Surely it is equipped with small handwheel；It is equipped with guide groove in valve body middle chamber wall portion, outer stem lower portion is fixed with lateral guiding axis, the guiding axis
One end stretch into guide groove, the doctor assemblies include cutter head and knife tail, and knife tail is fixed in inner valve stem, and cutter head front is equipped with
Upper and lower scraping blade, upper scraping blade can carry out plane contact with valve clack sealing surface, and lower scraping blade can carry out plane contact with sealing surface of seat,
It is attached with axis pin between cutter head rear portion and knife tail, cutter head rear portion is also fixed with brace, the folder between the brace and cutter head
Between angle is 120 ° -150 °, brace head is arc-shaped structure, and cutter head is additionally provided with retaining plate with knife tail junction, the retaining plate
Mounted on the back side of brace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710225502.8A CN106884991B (en) | 2017-04-07 | 2017-04-07 | A kind of band scraper shut-off valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710225502.8A CN106884991B (en) | 2017-04-07 | 2017-04-07 | A kind of band scraper shut-off valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106884991A CN106884991A (en) | 2017-06-23 |
| CN106884991B true CN106884991B (en) | 2018-10-12 |
Family
ID=59182731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710225502.8A Active CN106884991B (en) | 2017-04-07 | 2017-04-07 | A kind of band scraper shut-off valve |
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| CN108591487A (en) * | 2018-07-06 | 2018-09-28 | 安徽姆大陆科技发展有限公司 | A kind of high-pressure slurry valve of belt supporting frame |
| CN109798383A (en) * | 2018-12-29 | 2019-05-24 | 广州启云机械有限公司 | A kind of piston type tune flow control valve |
| CN110332317B (en) * | 2019-08-02 | 2020-12-04 | 凯瑞特阀业有限公司 | Stop valve |
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| KR20080081588A (en) * | 2007-03-06 | 2008-09-10 | 주식회사 신성엔지니어링 | Knife gate valve |
| CN202674337U (en) * | 2012-07-04 | 2013-01-16 | 软控股份有限公司 | Butterfly valve provided with scraper |
| CN104100728B (en) * | 2014-08-07 | 2016-06-08 | 郑子叶 | A kind of self-seal type gate valve |
| CN204985799U (en) * | 2015-07-16 | 2016-01-20 | 浙江福瑞科流控机械有限公司 | Lifting type plug -valve |
| CN105065701B (en) * | 2015-08-05 | 2017-12-01 | 浙江福瑞科流控机械有限公司 | Hard sealing hoisting type lock plug valve and its control method |
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Effective date of registration: 20211222 Address after: 214000 Yangshi community, Luoshe Town, Huishan District, Wuxi City, Jiangsu Province Patentee after: WUXI SKF MACHINERY MANUFACTURING Co.,Ltd. Address before: 325115 Lixi Village, Yantou Town, Yongjia County, Wenzhou City, Zhejiang Province Patentee before: Li Xiangqing |