CN105889549A - Thread type ball valve and valve rod - Google Patents
Thread type ball valve and valve rod Download PDFInfo
- Publication number
- CN105889549A CN105889549A CN201610409974.4A CN201610409974A CN105889549A CN 105889549 A CN105889549 A CN 105889549A CN 201610409974 A CN201610409974 A CN 201610409974A CN 105889549 A CN105889549 A CN 105889549A
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- Prior art keywords
- valve rod
- section
- gland
- valve
- ball valve
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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
- 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
- F16K5/06—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 spherical surfaces; Packings therefor
- F16K5/0647—Spindles or actuating 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
- 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
- F16K5/06—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 spherical surfaces; Packings therefor
- F16K5/0663—Packings
- F16K5/0694—Spindle sealings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Taps Or Cocks (AREA)
- Details Of Valves (AREA)
Abstract
The invention relates to the technical field of chemical machinery and equipment, in particular to a thread type ball valve and a valve rod. The invention provides the thread type ball valve which comprises the valve rod; the valve rod comprises a threaded section, a necking section and a sealing section; the threaded section is used for being connected with a valve rod drive mechanism; the diameter of the threaded section is smaller than or equal to that of the necking section, and the diameter of the necking section is smaller than that of the sealing section, so that the penetration of the valve rod is increased, therefore, the height of the valve rod is increased; a convex head used for being connected with a ball core is arranged at the bottom of the sealing section; the ball valve further comprises a pressure cover arranged around the periphery of the valve rod and a filling sleeve in threaded connection with the pressure cover, one end of the pressure cover is connected with the necking section, and the other end is connected with the sealing section; the bottom surface of the pressure cover, the outer wall of the sealing section and the inner wall of the filling sleeve form a filling box used for allowing fillers to be placed in; through increasing the height of the valve rod, the height of the filling box is increased, and further, the thread screwing length of the pressure cover and the filling sleeve is increased, so that the sealing performance and the use safety of the ball valve are improved.
Description
Technical field
The present invention relates to chemical mechanical equipment technical field, particularly relate to a kind of screw thread type ball valve and
Valve rod, is specifically related to a kind of screw thread type ball valve that can improve sealing and security performance and valve rod.
Background technology
Screw thread type ball valve, including the ball valve sealed with tapered thread and the ball valve connected with loose joint,
The former connects for female thread, and the latter connects for external screw thread.Commercially available threaded float ball ball valve (two
Chip) in stuffing box be made up of filler set, gland, valve rod, filler and thrust pad, filler set
The most threaded with gland, there is no packing press ring.It is in security consideration, in existing ball valve
Valve rod is all to penetrate from the inside, to prevent valve rod pressurized from going out.Meanwhile, on ball valve stuffing box also
Have two handle banking stops, during to ensure operation valve can standard-sized sheet and closing tight, which results in
Screw thread type ball valve filler set can only be female thread, and can not arrange special packing press ring.This is just
Creating two problems, one is for small-bore flange type ball valve, for ensureing stuffing box height,
Valve ball diameter and valve size must be strengthened, thereby increase Financial cost.To screw thread type ball valve,
Conventional bore is smaller, for can not reducing too greatly with tube fit valve size
Stuffing box height, result is that filler is the thinnest, and the number of leads in gland is also little, sealing effectiveness
Difference, the most dangerous.Two is that screw thread type ball valve is not provided with pressure ring, and life-time service filler can enter
Thread space, filler loosens, and causes leakage.
Valve designs, and filler width S typically takes S=(0.9-2.5) √ g, and g is stem diameter.
Packed height H typically takes 3～5S.The length of thread engagement of gland, should meet GB/
Regulation in T197-2003 " Metric Thread's Tolerance ", at least should use medium screwing length to combine
(N).Table 1 is the dimension measurement result of commercially available stainless steel silk button ball valve, and gland silk tooth number is only
Have 3～4 to enclose, actual can only enter 2～3 circle, to stay in terms of a circle.As can be seen from the table,
The stuffing box of these ball valves designs all serious non-compliance design specification and GB, and such valve is only
Can be used for walking non-flammable compressive gas and water, it is impossible to for inflammable and explosive medium, therefore present chemical process
Pipeline does not the most use screw thread type ball valve.
Table 1 commercially available two-piece type screw thread ball valve stuffing box measurement result
Summary of the invention
(1) to solve the technical problem that
The technical problem to be solved in the present invention is that existing screw thread type ball valve filler is the thinnest, gland
Number of leads is few, and does not design pressure ring, causes sealing poor, and safety is low, does not meets stone
Change valve design standard, it is impossible to for inflammable and explosive medium.
(2) technical scheme
In order to solve above-mentioned technical problem, the invention provides a kind of valve rod, it includes connecting successively
Thread segment, undergauge section and the seal section connect, described thread segment is for being connected with valve rod drive mechanism；
The diameter of described thread segment is less than or equal to the diameter of described undergauge section, the diameter of described undergauge section
Diameter less than described seal section；The bottom of described seal section is provided with convex for be connected with core
Head.
Wherein, described thread segment, undergauge section, seal section and plush copper are one-body molded.
Present invention also offers a kind of screw thread type ball valve, it includes above-mentioned valve rod, also includes winding
In the peripheral gland of described valve rod and the filler set threadeded with described gland, and described filler
It is sheathed on the outside of described gland；One end of described gland is connected with described undergauge section, described pressure
The other end of lid is connected with described seal section；The bottom surface of described gland, the outer wall of seal section and fill out
The inwall of material set constitutes the stuffing box for placing filler.
Wherein, the bottom of described gland is provided with the pressure ring extended to described stuffing box, described pressure ring
Filler in being compacted described stuffing box, to prevent the filler in described stuffing box from overflowing.
Wherein, described core is provided with arc groove, described plush copper and described arc groove grafting, makes
Described valve rod and described core are fixed and are connected.
Wherein, described seal section is provided with thrust washer with the junction of described plush copper.
(3) beneficial effect
The technique scheme of the present invention has the advantage that
The invention provides a kind of valve rod, this valve rod includes thread segment, the undergauge section being sequentially connected with
And seal section, thread segment is for being connected with valve rod drive mechanism；Thread segment is for driving with valve rod
Mechanism connects；The diameter of thread segment is less than or equal to the diameter of undergauge section, and the diameter of undergauge section is little
Diameter in seal section；The bottom of seal section is provided with the plush copper for being connected with core, to guarantee
In use prevent valve rod from flying out valve body, and then ensure the safety of whole valve and pipeline.
And by the diameter of thread segment and undergauge section is less than seal section, to increase the penetrating property of valve rod,
Thereby increase the height of valve rod.
Present invention also offers a kind of screw thread type ball valve, including above-mentioned valve rod, also include being set around
Gland that valve rod is peripheral and the filler set threadeded with gland, and filler is sheathed on outside gland
Side；One end of gland is connected with undergauge section, and the other end of gland is connected with seal section；Gland
The inwall of bottom surface, the outer wall of seal section and filler set constitutes the stuffing box for placing filler.This
Apply for being located at gland corresponding to undergauge section and seal section the periphery of valve rod, by increasing valve rod
Highly, thus increase the height of stuffing box, be also beneficial to the spiral shell increasing gland with filler inner room
Stricture of vagina screwing length, improves sealing and the safety in utilization of ball valve, and makes setting of stuffing box
Meter can meet petrochemical industry ball valve standard, may be used for inflammable and explosive medium, is also beneficial to solve silk
The problem that button ball valve cannot be used for chemical process pipeline.
Accompanying drawing explanation
Fig. 1 is the concrete knot of the DN20PN25 ball valve of the present invention a kind of screw thread type ball valve embodiment
Structure schematic diagram；
Fig. 2 be the present invention a kind of screw thread type ball valve embodiment DN20PN25 ball valve in gland
Structural representation；
Fig. 3 be the present invention a kind of screw thread type ball valve embodiment DN20PN25 ball valve in valve rod
Front view；
Fig. 4 be the present invention a kind of screw thread type ball valve embodiment DN20PN25 ball valve in valve rod
Rearview.
In figure: 1-1: clamp nut；1-2: spring shim；1-3: handle；1-4: gland；
1-5: filler set；1-6,1-1-13: filler；1-7: valve rod；1-8: main valve body；1-9: close
Seal；1-10: thrust washer；1-11: auxiliary valve body；1-13: core；2-1: gland body；
2-2: screw linkage section；2-3: pressure ring；3-1: thread segment；3-2: undergauge section；3-3: seal
Section；3-4: plush copper.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below will knot
Close the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear,
It is fully described by, it is clear that described embodiment is a part of embodiment of the present invention, and not
It it is whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not having
There is on the premise of making creative work the every other embodiment obtained, broadly fall into the present invention
The scope of protection.
Particularly, in the present embodiment, the screw thread type ball valve in the application is a kind of novel silk
Button ball valve, includes the valve rod of undergauge section by setting so that itself and existing screw thread type ball valve
Comparing, the height of stuffing box adds one times, therefore the highest bench-type screw thread type ball valve.
As shown in Figure 3 to Figure 4, the invention provides a kind of valve rod, it includes being sequentially connected with
Thread segment 3-1, undergauge section 3-2 and seal section 3-3, thread segment 3-1 is used for and valve rod drive mechanism
Connect；The diameter of thread segment 3-1 is less than or equal to the diameter of undergauge section 3-2, undergauge section 3-2
The diameter diameter less than seal section 3-3；The bottom of seal section 3-3 be provided with for core 1-13
Plush copper 3-4 connected, is used for preventing valve rod 1-7 from flying out, and then protection valve rod 1-7 is in high pressure work
Safety under the conditions of condition.Specifically, thread segment 3-1, undergauge section 3-2, seal section 3-3 and
Plush copper 3-4 is one-body molded, by the diameter of thread segment 3-1 and undergauge section 3-2 is less than seal section
The diameter of 3-3, to increase the penetrating property of valve rod 1-7, thereby increases the height of valve rod 1-7.
As shown in Figure 1 to Figure 2, present invention also offers a kind of screw thread type ball valve, including above-mentioned
Valve rod 1-7, also includes being set around valve rod peripheral gland 1-4 and threadeds with gland 1-4
Filler overlaps 1-5, and filler set 1-5 is located at the outside of gland 1-4；One end of gland 1-4 and contracting
Footpath section 3-2 connects, and the other end of gland 1-4 is connected with seal section 3-3；The bottom surface of gland 1-4,
The inwall of the outer wall of seal section 3-3 and filler set 1-5 constitutes the stuffing box for placing filler.This
Apply for being located at gland 1-4 corresponding to undergauge section 3-2 and seal section 3-3 the periphery of valve rod 1-7,
By increasing the height of valve rod 1-7, thus increase the height of stuffing box, be also beneficial to increase pressure
(wherein, gland 1-4 is by screwing connection for length of thread engagement between lid 1-4 and filler set 1-5
Section 2-2 is connected with filler set 1-5), improve sealing and the safety in utilization of ball valve, and make
Stuffing box be designed to meet petrochemical industry ball valve standard, may be used for inflammable and explosive medium, also
Advantageously account for the problem that screw thread type ball valve cannot be used for chemical process pipeline.
In the present embodiment, gland 1-4 includes gland body 2-1, screws linkage section 2-2 and pressure
Ring 2-3；Specifically, the bottom of gland 1-4 is provided with the pressure ring 2-3 extended to stuffing box, pressure ring
2-3 is for the filler 1-6 that is compacted in stuffing box, to prevent the filler 1-6 in stuffing box from overflowing,
To improve sealing property, overcome filler in the prior art and can enter thread space, filler pine
Dynamic, thus the problem caused；Gland 1-4 is connected with filler set 1-5 by screwing linkage section 2-2,
Specifically, the outer surface of gland body 2-1 be provided with for filler set 1-5 be connected screw connection
Section 2-2, and to screw linkage section 2-2 be threaded body.Wherein, between gland 1-4 and filler set 1-5
The threaded number of turns be referred to as gland silk number；If the quantity of gland silk is the most, represent gland 1-4
The best with the connection sealing of filler set 1-5, using effect is the best.Use the gland in the application
1-4, increases the contact area of gland 1-4 and filler set 1-5, improves gland 1-4 and filler
The threaded number of turns between set 1-5, is favorably improved security performance, it is thus possible to be applied to chemical industry work
On skill pipeline.Particularly, in this application, filler set 1-5 is located on main valve body 1-8, and fills out
Set 1-5 is one-body molded with main valve body 1-8 for material.
GB GB/T1-1337-2007 " steel globe valve of oil, petrochemical industry and related industries "
5.1-13.3 bar specifies, ball valve should use adjustable sealing structure, should not dismantle any the zero of ball valve
Part just can regulate packing seal power.The 5.1-13.4 article regulation, gland should be by hold-down grid
Forming with filler pressing sleeve, hold-down grid should be with two through holes (not opening) installing loose joint bolt
Flange, the bolt of gland should be able to be fixed on valve gap or valve body neck through the through hole of hold-down grid
On the flange in portion.Particularly, the gland 1-4 that the present invention provides is by ball valve hold-down grid (quite
Gland body 2-1 in the application), pressure ring 2-3 and bolt (be equivalent to the rotation in the application
Close linkage section 2-2) it is integrated (being called for short three-in-one ball valve gland), this three-in-one ball valve pressure
Lid, simple in construction, easy for installation and with low cost, be conducive to promoting the use of, it is also possible to use
In flange type ball valve.
Particularly, the valve rod that the present invention proposes is mainly for DN25 and following small-bore screw thread type
Ball valve, is also applied for small-bore flange type ball valve.In the present embodiment, valve rod is applied to two
As a example by chip screw thread type ball valve, illustrated.
Use the valve rod in the application so that the aspect ratio existing screw thread type ball valve of stuffing box is high
One times.Such as present commercially available DN20 stainless steel silk button ball valve, the height of stuffing box is
7.21mm, screw thread M14 × 1.5 (diameter × pitch), stem diameter φ 7.9mm (screw thread M8
× 1.5), length 32.49mm, gland silk 3 encloses, and gland is actual can only enter 3mm (2 circle),
Height after filler compression is 4.21mm.If increasing the spatial altitude of stuffing box, the DN20 of customization
The design parameter of stainless steel silk button ball valve is: the spatial altitude of stuffing box is 1-13mm, screw thread
M16 × 1.5, stem diameter φ 9.7mm (screw thread M10 × 1.5), length 42mm, gland silk
4 circles, gland is actual can only enter 4.5mm (3 circle), and the height after filler compression is 7mm.Base
In the case of the diameter of above-mentioned core and valve design are constant, use the valve rod knot in the application
Structure, is set to M6 × 1 by thread segment 3-1, a diameter of 8mm of undergauge section 3-2, seal section 3-3
A diameter of 9.2mm, screwing linkage section 2-2 is M16 × 1.25, and the total height of such valve rod can increase
Being added to 47mm, the spatial altitude of stuffing box is 18mm, and the packed height after compression is 8mm,
The linkage section that screws of gland 1-4 and filler set 1-5 enters 7mm (5.6 circle), and gland screw thread
The adjustable space of also ± 2mm, the bottom of gland 1-4 is provided with the pressure of one section of 3mm length simultaneously
Ring 2-3, the filler 1-6 in being compacted placement stuffing box, to prevent from placing filling out in stuffing box
Material 1-6 overflows.
Specifically, core 1-13 is provided with arc groove, plush copper 3-4 and arc groove grafting so that
Valve rod 1-7 is fixing with core 1-13 to be connected；Seal section 3-3 is only provided with the junction of plush copper 3-4
Pushing pad sheet 1-10.Wherein, the diameter of the plush copper 3-4 diameter more than seal section 3-3, and plush copper
The top of 3-4 is circular, and bottom is sunk key；Valve rod 1-7 under fluid pressure effect, its shoulder
It is close to and compresses thrust washer 1-10, just creating frictional force when valve rod 1-7 rotates, now
Thrust washer 1-10 primarily serves reduction frictional force effect, but also contributes to improve sealing property.
This screw thread type ball valve also includes the auxiliary valve body 1-11 being connected with main valve body 1-8, wherein, main
The junction of valve body 1-8 and auxiliary valve body 1-11 is provided with sealing ring 1-9, with ensure main valve body 1-8 with
The sealing property of auxiliary valve body 1-11.In the present embodiment, core 1-13 as the opening and closing element of valve,
Core 1-13 rotates to realize switching motion under valve rod 1-7 drive mechanism effect with valve rod 1-7
Valve；Core 1-13 is mainly used in blocking or connect pipeline and equipment medium it can also be used to flow
The regulation of body and control, the fluid resistance of core 1-13 is little, simple in construction, and volume is little, weight
Gently, the most reliably, operate easy to maintenance, the erosion of valve sealing face will not be caused, be suitable for model
Enclose wide.
Specifically, valve rod 1-7 drive mechanism includes the handle 1-3 being rotatably connected with valve rod 1-7,
Handle 1-3 includes canned paragraph, the section of holding and for connecting the linkage section of canned paragraph and the section of holding；Gu
The horizontal fragmentation of the section of determining is provided with hole slot, and thread segment 3-1 passes hole slot, and thread segment 3-1 is by tight
It is connected Gu nut 1-1 and spring shim 1-2 is fixing with the horizontal fragmentation of canned paragraph.Use above-mentioned solid
Determine mode, it is simple to install and dismantle, good fixing effect, and be easily commercially commercially available, make
With convenient.
Specifically, main valve body 1-8 is provided with at least one location dress corresponding to the vertical segmentation of canned paragraph
Put.By arranging positioner, when handle 1-3 is clockwise or counterclockwise to 90 °,
Play the effect of fixed handle 1-3.Particularly, it is provided with between gland 1-4 top and handle 1-3
Gap, is used for providing installation surplus.
Specifically, canned paragraph, linkage section and the section of holding are one-body molded.Specifically, linkage section
Axis is 110 to 130 degree with the angle of the horizontal fragmentation place axis of the section of holding；Canned paragraph
Axis is 0 to 15 degree with the angle of the horizontal fragmentation place axis of the section of holding.Thus, canned paragraph
It is 110-145 degree with the angular range of horizontal plane, meets body mechanics and use habit, specifically real
Shi Shi, selects concrete angle value according to the custom of user.
Preferably, for ease of improving the comfort of operator, in the present embodiment, the section of holding
On be arranged with long sleeve.The material of long sleeve can be hard plastic or rubber, it is possible to for corium, according to
Implementation condition and cost control, select corresponding material.
By design structure and the design of ball valve standard of the present invention, for improving the close of ball valve further
Sealing property, the screw thread on gland both sides is connected with high voltage bearing three square ring loose joints, it is also possible to connect with O
The loose joint that type ring, politef, aluminum pad etc. seal.
Generally speaking, based on the present invention set forth above to valve rod and the improvement of gland so that little
Bore screw thread type ball valve adds about one times for the spatial altitude installing filler, makes simultaneously
Being designed to of screw thread type ball valve meets petrochemical industry ball valve standard, may be used for inflammable and explosive medium,
Solve the problem that screw thread type ball valve cannot be used for chemical process pipeline.Particularly, for DN32
And the ball valve of above bore, because in valve body, space is relatively large, valve rod is without reducing.It is worth strong
Adjusting, the ball valve weight of screw thread type ball valve, particularly below DN50 is the bore methods such as correspondence
The 1/3～1/2 of blue formula ball valve weight, easy for installation, light weight, it is easy to mass production and popularization make
With, and the ball valve purchase cost of enterprise can be greatly reduced.
Below in conjunction with specific embodiment, the two-piece type screw thread ball valve of the present invention is specifically described.
Meet GB to make the stuffing box of two-piece type screw thread ball valve design, can be used for inflammable and explosive
Medium and chemical process pipeline, difficulty is at DN25 and following small-bore screw thread type ball valve, filler
Set is increased, it is necessary to supporting valve rod lengthens, but valve rod length is worn to enter from beneath, and the present invention adopts
This problem is efficiently solved by the mode of valve rod undergauge.For DN6～25 6 kinds of specifications not
Rust steel two-piece type screw thread type ball valve, nominal pressure DN25, the size of valve ball is identical with commercially available ball valve,
Design result is listed in table 2, and the data in analytical table can find, for installing the bulk of filler
All meet GB and design specification.Wherein, packed height/filler width=2.45～2.8, with design
The minima 3 of code requirement is more or less the same, and filler preferably employs carbon fiber reinforced ptfe
To obtain optimal packed height value.
The design result of table 2 below DN25 small-bore rustless steel two-piece type screw thread ball valve
For DN32 and above two-piece type screw thread ball valve, in valve body, space is sufficiently large, and valve rod is not
Must reducing, filler external threading use commercially available ball valve specification, filler set by above-mentioned relevant regulations design,
Design result is listed in table 3.
The design result of table 3 more than DN32 rustless steel two-piece type screw thread ball valve
In sum, the invention provides a kind of valve rod, this valve rod includes the screw thread being sequentially connected with
Section, undergauge section and seal section, thread segment is for being connected with valve rod drive mechanism；Thread segment is used for
It is connected with valve rod drive mechanism；The diameter of thread segment is less than or equal to the diameter of undergauge section, undergauge
The diameter of section is less than the diameter of seal section；The bottom of seal section is provided with convex for be connected with core
Head, to guarantee in use to prevent valve rod from flying out valve body, and then ensures whole valve and pipe
The safety in road.And by the diameter of thread segment and undergauge section is less than seal section, to increase valve
The penetrating property of bar, thereby increases the height of valve rod.
Present invention also offers a kind of screw thread type ball valve, including above-mentioned valve rod, also include being set around
Gland that valve rod is peripheral and the filler set threadeded with gland, and filler is sheathed on outside gland
Side；One end of gland is connected with undergauge section, and the other end of gland is connected with seal section；Gland
The inwall of bottom surface, the outer wall of seal section and filler set constitutes the stuffing box for placing filler.This
Apply for being located at gland corresponding to undergauge section and seal section the periphery of valve rod, by increasing valve rod
Highly, thus increase the height of stuffing box, be also beneficial to the spiral shell increasing gland with filler inner room
Stricture of vagina screwing length, improves sealing and the safety in utilization of ball valve, and makes setting of stuffing box
Meter can meet petrochemical industry ball valve standard, may be used for inflammable and explosive medium, is also beneficial to solve silk
The problem that button ball valve cannot be used for chemical process pipeline.
Last it is noted that above example is only in order to illustrate technical scheme, and
Non-to its restriction；Although the present invention being described in detail with reference to previous embodiment, ability
The those of ordinary skill in territory is it is understood that it still can be to the skill described in foregoing embodiments
Art scheme is modified, or wherein portion of techniques feature is carried out equivalent；And these are repaiied
Change or replace, not making the essence of appropriate technical solution depart from various embodiments of the present invention technical side
The spirit and scope of case.
Claims (6)
1. a valve rod, it is characterised in that: the thread segment that includes being sequentially connected with, undergauge section and close
Envelope section, described thread segment is for being connected with valve rod drive mechanism；The diameter of described thread segment is less than
Or the diameter equal to described undergauge section, the diameter of described undergauge section is less than the diameter of described seal section；
The bottom of described seal section is provided with the plush copper for being connected with core.
Valve rod the most according to claim 1, it is characterised in that: described thread segment, undergauge
Section, seal section and plush copper are one-body molded.
3. a screw thread type ball valve, it is characterised in that: include such as any one of claim 1-2 institute
The valve rod stated, also includes being set around the peripheral gland of described valve rod and threadeding with described gland
Filler set, and described filler is sheathed on the outside of described gland；One end of described gland and institute
Stating undergauge section to connect, the other end of described gland is connected with described seal section；The end of described gland
The inwall of face, the outer wall of seal section and filler set constitutes the stuffing box for placing filler.
Screw thread type ball valve the most according to claim 3, it is characterised in that: described gland
Bottom is provided with the pressure ring extended to described stuffing box, and described pressure ring is used for being compacted in described stuffing box
Filler, to prevent the filler in described stuffing box from overflowing.
Screw thread type ball valve the most according to claim 3, it is characterised in that: in described core
It is provided with arc groove, described plush copper and described arc groove grafting so that described valve rod and described core
Fixing connection.
Screw thread type ball valve the most according to claim 3, it is characterised in that: described seal section
It is provided with thrust washer with the junction of described plush copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610409974.4A CN105889549A (en) | 2016-06-12 | 2016-06-12 | Thread type ball valve and valve rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610409974.4A CN105889549A (en) | 2016-06-12 | 2016-06-12 | Thread type ball valve and valve rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105889549A true CN105889549A (en) | 2016-08-24 |
Family
ID=56729137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610409974.4A Pending CN105889549A (en) | 2016-06-12 | 2016-06-12 | Thread type ball valve and valve rod |
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| CN (1) | CN105889549A (en) |
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| DE202009010531U1 (en) * | 2009-08-04 | 2009-10-01 | Colshorn, Michael | ball valve |
| CN203413157U (en) * | 2013-06-10 | 2014-01-29 | 温州金波阀门有限公司 | Hard-to-leak ball valve |
| CN203560491U (en) * | 2013-11-18 | 2014-04-23 | 山西浩宇阀门科技有限公司 | High-performance welding ball valve |
| CN204004541U (en) * | 2014-08-18 | 2014-12-10 | 浙江精杰实业有限公司 | A kind of floating type upper dress ball valve |
| CN104565422A (en) * | 2013-10-29 | 2015-04-29 | 上海上冶阀门制造有限公司 | Integrated unloading type low-temperature ball valve |
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| CN204879009U (en) * | 2015-06-12 | 2015-12-16 | 浙江成高阀门有限公司 | Ball valve is moved to high and flat table flotation |
| CN205689796U (en) * | 2016-06-12 | 2016-11-16 | 盐城市特一密封机械制造有限公司 | A kind of screw thread type ball valve and valve rod |
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| CN104565422A (en) * | 2013-10-29 | 2015-04-29 | 上海上冶阀门制造有限公司 | Integrated unloading type low-temperature ball valve |
| CN203560491U (en) * | 2013-11-18 | 2014-04-23 | 山西浩宇阀门科技有限公司 | High-performance welding ball valve |
| CN204004541U (en) * | 2014-08-18 | 2014-12-10 | 浙江精杰实业有限公司 | A kind of floating type upper dress ball valve |
| CN104747750A (en) * | 2015-02-04 | 2015-07-01 | 苏州纽威阀门股份有限公司 | Floating ball valve |
| CN204879009U (en) * | 2015-06-12 | 2015-12-16 | 浙江成高阀门有限公司 | Ball valve is moved to high and flat table flotation |
| CN205689796U (en) * | 2016-06-12 | 2016-11-16 | 盐城市特一密封机械制造有限公司 | A kind of screw thread type ball valve and valve rod |
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Application publication date: 20160824 |