CN209638436U - The small-aperture ball valve of direct press type valve stem packing sealing - Google Patents
The small-aperture ball valve of direct press type valve stem packing sealing Download PDFInfo
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- CN209638436U CN209638436U CN201920056948.7U CN201920056948U CN209638436U CN 209638436 U CN209638436 U CN 209638436U CN 201920056948 U CN201920056948 U CN 201920056948U CN 209638436 U CN209638436 U CN 209638436U
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Abstract
The small-aperture ball valve of direct press type valve stem packing sealing, including valve body (1), valve seat (2), sphere (3), gland nut (4), stuffing-box (5), gland (6), handwheel body (7), valve rod (8) and filling body (9)；Gland is compressed using gland nut, facilitates the elastic adjusting of filler.The sealing station of valve seat has annular groove, can reduce the contact area of sealing surface between valve seat and sphere, has from close property, can stop a leak, and while improving sealing performance and reduces the open and close torque of valve rod.The structure of valve is more compact, convenient for operation, the working efficiency of ball valve can be improved, keep system maintenance safer.Changing traditional rotating boosting formula valve stem packing sealing structure is direct press type valve stem packing sealing structure, easy for installation, is unlikely to deform, stable, is effectively protected valve stem packing, guarantees that the leakproofness of ball valve is relatively reliable, improve the service life of filler.
Description
Technical field
The present invention relates to the structure improved technologies of plug valve device, the especially small-bore ball of direct press type valve stem packing sealing
Valve.
Background technique
Smaller diameter valve body cavity narrow space, existing common structure design have been not suitable for.Therefore, improved technology is not yet
It is disconnected to release.
In existing main improved technology, valve stem end is processed into flat and with short axle, and sphere has flat up and down
Fixed sphere is played the role of for connecting with upper lower valve rod in slot and hole, hole, limits sphere freedom degree.Sector is matched with valve rod
It closes, transmits the torque from handle.Moreover, the ball valve that sealing pair is manufactured with PTFE high molecular material, it is impossible to be used in temperature is big
In the operating condition that 280 DEG C or pumped (conveying) medium are in particulate.And make the hard seal ball valve of sealing pair with metal material, in screw
Various situations can occur because of structure difference when body.Such as metallic elastic valve base sealing structure, due between elastic seat and sphere simultaneously
Not formed gap, so its frictional force is very big.It is not easy to seal between its floating valve seat of metal floating valve seat sealing structure and valve body.
In addition, combined spheres bracing type sealing structure, since components are more, structure is complicated, increases difficulty of processing and manufacturing cost, especially
It is small-bore hard seal ball valve, what this structure was clearly also not suitable for.
The valve stem packing sealing structure of small-aperture ball valve at present is to rotatably compress formula valve stem packing sealing structure, this
The structure of traditional type has many drawbacks, such as: valve stem packing is to rotatably compress to reach sealing by gland, this structure
Pattern be easy to cause the damage in sealing ring end part seal face, while also having biggish negative interaction to the apex seal performance of filler,
The valve stem packing of small-aperture ball valve leaks, and caused by being mostly this reason, and this structural shape is also not convenient for online
Filler is compressed, the security performance and use and maintenance performance of valve are influenced.
Summary of the invention
The object of the present invention is to provide the small-aperture ball valves of direct press type valve stem packing sealing, overcome the shortage of prior art, mention
The sealing performance of high small-aperture ball valve extends the use and maintenance phase.
The purpose of the present invention will be realized by following technical measures: including valve body, valve seat, sphere, gland nut, filler
Letter, gland, handwheel body, valve rod and filling body；Valve chamber back boxing fills valve seat in the middle part of the valve body of horizontal, and ball is disposed in the middle part of valve seat
Body, sphere top are connect with valve rod lower end, have axis hole on the middle head that valve body middle top surface raises upward, valve rod is upward through this
The upper section of axis hole, the axis hole has the stuffing-box of tubular, has filling body in the stuffing-box, the stuffing-box top at the top of filling body
It is mounted with the gland nut being sleeved on outside valve rod upper section, has gland of the coaxial package on valve rod on gland nut top,
Gland outer is tightened on the middle head of valve body middle top surface, valve rod upper end install handwheel body, the outer diameter of gland with fill out
Expect that letter diameter is identical, the internal diameter of gland is identical as valve rod outer diameter.
Especially, valve body 1 includes two parts being tightly connected axially through screw.
Especially, the middle head upper end edge of valve body middle top surface is symmetrically provided with guide groove, corresponding, gland outer wall middle section
It is symmetrically arranged with a pair of guiding rib with guide groove cooperation.
Especially, valve seat shape in disk form has through-hole in the middle part of valve seat, in valve seat side through hole edge it is centripetal have recessed face and
There is the annular groove around through-hole, the annular groove is towards sphere.
Especially, the ball interior of horizontal has horizontal direction to lead directly to chamber, has connecting hole at the top of sphere, valve rod lower end is mounted on
On the connecting hole.
Especially, gland upper end edge locally has 90 ° of locating convex blocks of gland of protrusion, corresponding, in handwheel body bottom
The downward local protuberance of bore edges has 90 ° of locating convex blocks of core wheel, and handwheel body bottom face compresses gland top end face, wherein gland
The block key that 90 ° of locating convex blocks are rotated as 90 ° of locating convex blocks of core wheel.
Especially, stem bottom outer wall has land shape protrusion, which is stuck in valve body head axis hole lower edge.
Advantages of the present invention and effect:
1) changing traditional rotating boosting formula valve stem packing sealing structure is direct press type valve stem packing sealing structure, installation side
Just, it is unlikely to deform, it is stable, it is effectively protected valve stem packing, guarantees that the leakproofness of ball valve is relatively reliable, improves making for filler
Use the period.
2) gland is compressed using gland nut, facilitates the elastic adjusting of filler.
3) sealing station of valve seat has annular groove, can reduce the contact area of sealing surface between valve seat and sphere, have
It from close property, can stop a leak, while improving sealing performance and reduce the open and close torque of valve rod.
4) hand wheel drive used, not only makes the structure of valve more compact, convenient for operation, and can be effectively prevented
If handle type ball valve is because of the maloperation caused by pulling, draw, knock, touching.The working efficiency that ball valve can be improved, pacifies system maintenance more
Entirely.
Detailed description of the invention
Fig. 1 is 1 structural schematic diagram of the embodiment of the present invention.
Fig. 2 is hand wheel structure schematic diagram in the embodiment of the present invention 1.
Fig. 3 be in Fig. 2 A-A to structural schematic diagram.
Fig. 4 is filling material gland structure schematic diagram in the embodiment of the present invention 1.
Fig. 5 is B-B direction structural schematic diagram in Fig. 4.
Fig. 6 is body top central axis hole upper end edge partial structural diagram in the embodiment of the present invention 1.
Fig. 7 be in Fig. 6 C to structural schematic diagram.
Appended drawing reference includes:
1- valve body, 2- valve seat, 3- sphere, 4- gland nut, 5- stuffing-box, 6- gland, 7- handwheel body, 8- valve rod,
9- filler, 101- guide groove, 201- valve seat annular groove, 90 ° of locating convex blocks of 601- gland, 602- guiding rib, 701- handwheel
90 ° of locating convex blocks.
Specific embodiment
The principle of the invention is that when valve rod 8 rotates clockwise 90 ° around O point, then sphere 3 also rotates with 90 °, and and valve
2 sealing surface tight connectings of seat, when the moment of friction between the moment of friction between sealing pair and filling body 9 and valve rod 8 is greater than medium pressure
When the torque that power is formed, valve is up to reliable sealing.Since valve seal compresses filling body using the axial sliding of gland 6
9 sealing structure, sealing structure are not influenced by valve rod rotation.When valve opening, sphere 3 is detached from rapidly 2 sealing surface of valve seat.Valve
When door is closed, sphere 3 coincide with 2 sealing surface of valve seat rapidly.It is small to reach unlatching torque, close strict purpose.
The present invention includes: valve body 1, valve seat 2, sphere 3, gland nut 4, stuffing-box 5, gland 6, handwheel body 7, valve rod
8 and filling body 9.
Present invention will be further explained below with reference to the attached drawings and examples.
Embodiment 1: if attached drawing 1 is to shown in Fig. 7, the 1 middle part valve chamber back boxing of valve body of horizontal fills valve seat 2, pacifies in the middle part of valve seat 2
Place body 3,3 top of sphere are connect with 8 lower end of valve rod, there is axis hole, valve rod 8 on the middle head that 1 middle top surface of valve body raises upward
It is upward through the axis hole, the upper section of the axis hole has the stuffing-box 5 of tubular, has filling body 9 in the stuffing-box 5, pushes up in filling body 9
5 top of stuffing-box in portion is mounted with the gland nut 4 being sleeved on outside 8 upper section of valve rod, has coaxial package to exist on 4 top of gland nut
Gland 6 on valve rod 8,6 outer of gland are tightened on the middle head of 1 middle top surface of valve body, and handwheel is installed in 8 upper end of valve rod
The outer diameter of body 7, gland 6 is identical as 5 diameter of stuffing-box, and the internal diameter of gland 6 is identical as 8 outer diameter of valve rod.
In aforementioned, valve body 1 includes two parts being tightly connected axially through screw.
In aforementioned, the middle head upper end edge of 1 middle top surface of valve body is symmetrically provided with guide groove 101, corresponding, outside gland 6
Wall middle section is symmetrically arranged with a pair of guiding rib 602 cooperated with guide groove 101.Guiding rib 602, which is caught in downwards in guide groove 101, to be made
Gland 6 positions, moreover, gland 6 is pressed down against filling body 9 and realizes sealing as gland nut 4 screws.
In aforementioned, the shape in disk form of valve seat 2 has through-hole in the middle part of valve seat 2, and side through hole edge is centripetal in valve seat 2 recessed face
And there is the annular groove 201 around through-hole, the annular groove 201 is towards sphere 3.
In aforementioned, there is horizontal direction to lead directly to chamber inside the sphere 3 of horizontal, there is connecting hole, 8 lower end of valve rod peace at the top of sphere 3
On the connecting hole.
In aforementioned, 6 upper end edge of gland locally has 90 ° of locating convex blocks 601 of gland of protrusion, corresponding, 7 bottom of handwheel body
The downward local protuberance of bore edges has 90 ° of locating convex blocks 701 of core wheel in portion, and 7 bottom face of handwheel body compresses 6 top end face of gland,
The wherein block key that 90 ° of locating convex blocks 601 of gland are rotated as 90 ° of locating convex blocks 701 of core wheel.
In aforementioned, handwheel body 7 is in the form of annular discs, and valve rod 8 is installed in the 7 middle part aperture of handwheel body.
In aforementioned, 8 bottom outer wall of valve rod has land shape protrusion, which is stuck in valve body 1 in head axis hole lower edge.
In the embodiment of the present invention, the middle head of valve body 1 has stuffing-box 5, and the top of stuffing-box 5 has symmetrical guide groove
101, filling body 9 is installed, the upper end of filling body 9 is equipped with gland 6, and the outer circle of gland 6 has symmetrical in stuffing-box 5
Guiding rib 602 and stuffing-box 5 top have symmetrical guide groove 101 match, the elastic adjusting of filling body 9 is to pass through pressure
To realize pressurization or decompression to gland 5, the guiding rib 602 is made in guide groove 101 for 270 ° of rotations of box nut 4
Can only be for linear motion, so gland 6 is to compress in the form compressed of keeping straight on, and make filler when compressing filler 9
Direct press type sealing is realized between body 9, valve rod 8 and stuffing-box 5, the upper end of the gland 6 there are 90 ° of locating convex blocks of a gland
601,90 ° of locating convex blocks 701 of 90 ° of locating convex blocks 601 of gland and core wheel overlap, i.e. 90 ° of locating convex blocks 701 of core wheel can be in filler
Make 90 ° of single revolution rotations in 270 ° of grooves possessed by the upper surface of gland 6, mainly plays positioning function, the sealing of the valve seat 2
Annular groove 201 possessed by position can reduce the contact area of sealing surface between valve seat 2 and sphere 3, improve sealing performance
Simultaneously and reduce the open and close torque of valve rod 8.2 sealing station of valve seat has annular groove 201.The outer spiral shell of gland nut 4 and stuffing-box 5
Line Xiang Xuanhe reaches sealing by rotatably compressing filling body 9.Driving device is driven using handwheel body 7.
Claims (7)
1. direct press type valve stem packing sealing small-aperture ball valve, including valve body (1), valve seat (2), sphere (3), gland nut (4),
Stuffing-box (5), gland (6), handwheel body (7), valve rod (8) and filling body (9)；It is characterized in that, in the valve body (1) of horizontal
Portion's valve chamber back boxing fills valve seat (2), disposes sphere (3) in the middle part of valve seat (2), connect at the top of sphere (3) with valve rod (8) lower end, valve
There is axis hole on the middle head that body (1) middle top surface raises upward, valve rod (8) is upward through the axis hole, and the upper section of the axis hole has tubular
Stuffing-box (5), have filling body (9) in the stuffing-box (5), stuffing-box (5) top at the top of filling body (9) is mounted with set
Gland nut (4) outside valve rod (8) upper section has filler pressure of the coaxial package on valve rod (8) on gland nut (4) top
It covers (6), gland (6) outer is tightened on the middle head of valve body (1) middle top surface, and handwheel body (7) are installed in valve rod (8) upper end,
The outer diameter of gland (6) is identical as stuffing-box (5) diameter, and the internal diameter of gland (6) is identical as valve rod (8) outer diameter.
2. the small-aperture ball valve of direct press type valve stem packing as described in claim 1 sealing, which is characterized in that valve body (1) includes
Two parts being tightly connected axially through screw.
3. the small-aperture ball valve of direct press type valve stem packing sealing as described in claim 1, which is characterized in that in the middle part of valve body (1)
The middle head upper end edge of top surface is symmetrically provided with guide groove (101), corresponding, and gland (6) outer wall middle section is symmetrically arranged with a pair
With the guiding rib (602) of guide groove (101) cooperation.
4. the small-aperture ball valve of direct press type valve stem packing sealing as described in claim 1, which is characterized in that valve seat (2) is in circle
There is through-hole at disk shape, valve seat (2) middle part, and the interior side through hole edge of valve seat (2) is centripetal to be had recessed face and have the annular around through-hole
Slot (201), the annular groove (201) is towards sphere (3).
5. the small-aperture ball valve of direct press type valve stem packing sealing as described in claim 1, which is characterized in that the sphere of horizontal
(3) internal to there is horizontal direction to lead directly to chamber, there is connecting hole at the top of sphere (3), valve rod (8) lower end is mounted on the connecting hole.
6. the small-aperture ball valve of direct press type valve stem packing sealing as described in claim 1, which is characterized in that gland (6)
Upper end edge locally has 90 ° of locating convex blocks (601) of gland of protrusion, and corresponding, bore edges are locally dashed forward downwards in handwheel body (7) bottom
Rising has 90 ° of locating convex blocks (701) of core wheel, and handwheel body (7) bottom face compresses gland (6) top end face, wherein 90 ° of gland positioning
The block key that convex block (601) is rotated as 90 ° of locating convex blocks (701) of core wheel.
7. the small-aperture ball valve of direct press type valve stem packing sealing as described in claim 1, which is characterized in that valve rod (8) bottom
Outer wall has land shape protrusion, which is stuck in valve body (1) in head axis hole lower edge.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920056948.7U CN209638436U (en) | 2019-01-14 | 2019-01-14 | The small-aperture ball valve of direct press type valve stem packing sealing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920056948.7U CN209638436U (en) | 2019-01-14 | 2019-01-14 | The small-aperture ball valve of direct press type valve stem packing sealing |
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| CN209638436U true CN209638436U (en) | 2019-11-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109488785A (en) * | 2019-01-14 | 2019-03-19 | 上海万丰船舶设备有限公司 | The small-aperture ball valve of direct press type valve stem packing sealing |
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2019
- 2019-01-14 CN CN201920056948.7U patent/CN209638436U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109488785A (en) * | 2019-01-14 | 2019-03-19 | 上海万丰船舶设备有限公司 | The small-aperture ball valve of direct press type valve stem packing sealing |
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