CN204284477U - A kind of stop valve spool pressure relief means thereon - Google Patents
A kind of stop valve spool pressure relief means thereon Download PDFInfo
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- CN204284477U CN204284477U CN201420686094.8U CN201420686094U CN204284477U CN 204284477 U CN204284477 U CN 204284477U CN 201420686094 U CN201420686094 U CN 201420686094U CN 204284477 U CN204284477 U CN 204284477U
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- compression leg
- spool
- unload
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Abstract
The utility model relates to a kind of stop valve spool pressure relief means thereon, described stop valve comprises valve body, valve rod, valve seat, valve gap, filling-material structure and spool, described valve gap is positioned at the upper end of valve body, and match with valve body, in valve body, valve seat is installed, described valve rod stretches in the inner chamber of valve body from top to bottom, and also filling-material structure is provided with between valve rod and body cavity, spool is connected with in the lower end of valve rod, the sealing surface of described spool and the sealing surface of valve seat form sealing pair, the lower end of described spool is connected with one and unloads compression leg, this unloads compression leg and comprises and unload compression leg main body, described compression leg main body of unloading is cone shape, have on the surface of unloading compression leg main body and severally unload pressure ring, described unload pressure ring be distributed in successively from top to bottom unload compression leg main body outer wall on, and adjacent unloading between pressure ring forms pressure relief groove.The utility model has the advantage of: medium is when by unloading compression leg, and due to the amplification of volume, the pressure of MEDIA FLOW warp reduces gradually, reaches the object of step-down.
Description
Technical field
The utility model relates to a kind of stop valve, particularly a kind of stop valve spool pressure relief means thereon.
Background technique
The open-shut device of stop valve (stop valve, Globe Valve) is the flap of stopper, and in plane or the extra large conical surface above sealing, flap is along the center line moving linearly of valve seat.The forms of motion of valve rod, (adopted name: dark bar), also has lifting rotation rod-type to can be used for controlling the flowing of all kinds fluids such as air, water, steam, various Korrosionsmedium, mud, oil product, liquid metal and radiating medium.Therefore, such stop valve valve that dams is suitable as and cuts off or regulate and throttling use very much.Valve rod due to such valve open or shutoff stroke relatively short, and there is cutting function very reliably, again due to the change of valve seat port and the stroke direct proportionality of flap, be very suitable for the adjustment to flow.
At present, the stop valve in commercially using, its valve is when just opening, the pressure of MEDIA FLOW warp is maximum, simultaneously also larger to washing away of the sealing surface of valve, when especially running into high-pressure medium, the easier sealing surface to valve causes damage, affects sealing effect.
Model utility content
The technical problems to be solved in the utility model is to provide a kind of stop valve spool pressure relief means thereon that can reduce the pressure of MEDIA FLOW warp when valve opening.
For solving the problems of the technologies described above, the technical solution of the utility model is: a kind of stop valve spool pressure relief means thereon, its innovative point is: described stop valve comprises valve body, valve rod, valve seat, valve gap, filling-material structure and spool, described valve gap is positioned at the upper end of valve body, and match with valve body, in valve body, valve seat is installed, described valve rod stretches in the inner chamber of valve body from top to bottom, and also filling-material structure is provided with between valve rod and body cavity, spool is connected with in the lower end of valve rod, the sealing surface of described spool and the sealing surface of valve seat form sealing pair, the lower end of described spool is connected with one and unloads compression leg, this unloads compression leg and comprises and unload compression leg main body, described compression leg main body of unloading is cone shape, have on the surface of unloading compression leg main body and severally unload pressure ring, described unload pressure ring be distributed in successively from top to bottom unload compression leg main body outer wall on, and adjacent unloading between pressure ring forms pressure relief groove.
Further, the bore of described pressure relief groove increases from bottom to top gradually.
The utility model has the advantage of: medium is when by unloading compression leg, and due to the amplification of volume, the pressure of MEDIA FLOW warp reduces gradually, reaches the object of step-down, allowing MEDIA FLOW pressure drop when sealing surface, avoid high-pressure medium washing away valve sealing face; The bore of pressure relief groove increases gradually simultaneously, can reduce the pressure of MEDIA FLOW warp as much as possible.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of stop valve spool pressure relief means thereon of the present utility model.
Embodiment
Schematic diagram is as shown in Figure 1 known, and stop valve spool pressure relief means thereon of the present utility model comprises valve body 6, valve rod 4, valve seat, valve gap, filling-material structure and spool 5.
Valve gap is positioned at the upper end of valve body 6, and match with valve body 6, in valve body 6, valve seat is installed, valve rod 4 stretches in the inner chamber of valve body 6 from top to bottom, and also filling-material structure is provided with between valve rod 4 and the inner chamber of valve body 6, be connected with spool 5 in the lower end of valve rod 4, the sealing surface of spool 5 and the sealing surface of valve seat form sealing pair.
Filling-material structure is specially: between valve rod 4 and valve body 6 inner chamber, be provided with filler cavity, filler 2 is filled with in filler cavity, be fixed by Gland 1 in the upper end of filler 2, the through hole holding stay-bolt and pass is had in one end of Gland 1, stay-bolt is fixed with nut through after this through hole, thus compress filler 2, also there is a Packing seat 3 between the lower end of filler 2 and valve body 6.
Be connected with one in the lower end of spool 5 and unload compression leg, this unloads compression leg and comprises and unload compression leg main body 8 and unload pressure ring 7, unload compression leg main body 8 in cone shape, have on the surface of unloading compression leg main body 8 and severally unload pressure ring 7, unload pressure ring 7 be distributed in successively from top to bottom unload compression leg main body 8 outer wall on, and adjacent unloading between pressure ring 7 forms pressure relief groove, the pressure ring 7 that unloads be positioned at topmost forms gas pressure relief slot jointly with the seal ring of spool 5 lower end, and the bore of pressure relief groove increases from bottom to top gradually.
When valve is when opening, medium can first through unloading compression leg, and successively by unloading pressure ring 7 and gas pressure relief slot, MEDIA FLOW through gas pressure relief slot time, can amplification owing to unloading the volume between compression leg and runner, thus reduce the pressure of medium, when flowing through gas pressure relief slot topmost, pressure is minimum to drop to, thus can reduce pressure medium washing away valve, affects sealing effect.
More than show and describe basic principle of the present utility model and major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (2)
1. a stop valve spool pressure relief means thereon, described stop valve comprises valve body, valve rod, valve seat, valve gap, filling-material structure and spool, described valve gap is positioned at the upper end of valve body, and match with valve body, in valve body, valve seat is installed, described valve rod stretches in the inner chamber of valve body from top to bottom, and also filling-material structure is provided with between valve rod and body cavity, spool is connected with in the lower end of valve rod, the sealing surface of described spool and the sealing surface of valve seat form sealing pair, it is characterized in that: the lower end of described spool is connected with one and unloads compression leg, this unloads compression leg and comprises and unload compression leg main body, described compression leg main body of unloading is cone shape, have on the surface of unloading compression leg main body and severally unload pressure ring, described unload pressure ring be distributed in successively from top to bottom unload compression leg main body outer wall on, and adjacent unloading between pressure ring forms pressure relief groove.
2. stop valve spool pressure relief means thereon according to claim 1, is characterized in that: the bore of described pressure relief groove increases from bottom to top gradually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420686094.8U CN204284477U (en) | 2014-11-17 | 2014-11-17 | A kind of stop valve spool pressure relief means thereon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420686094.8U CN204284477U (en) | 2014-11-17 | 2014-11-17 | A kind of stop valve spool pressure relief means thereon |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204284477U true CN204284477U (en) | 2015-04-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420686094.8U Active CN204284477U (en) | 2014-11-17 | 2014-11-17 | A kind of stop valve spool pressure relief means thereon |
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| CN (1) | CN204284477U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105221756A (en) * | 2015-09-16 | 2016-01-06 | 浙江贝托阀门有限公司 | Stable type stop valve |
-
2014
- 2014-11-17 CN CN201420686094.8U patent/CN204284477U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105221756A (en) * | 2015-09-16 | 2016-01-06 | 浙江贝托阀门有限公司 | Stable type stop valve |
| CN105221756B (en) * | 2015-09-16 | 2018-04-27 | 浙江贝托阀门有限公司 | Stable type shut-off valve |
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