CN201502719U - Pneumatic two-position stop valve - Google Patents

Abstract

The utility model relates to a pneumatic two-position stop valve applied to rubber machinery, which comprises a piston actuation mechanism and a stop valve. The piston actuation mechanism comprises a piston, a heating wire, a piston sealing ring, a piston press ring and a shaft elastic baffle ring; the stop valve comprises a lower packing gasket, packing, a valve body, a packing gland, a protective ring, a large nut, a support threaded sleeve, a support, a spring, a spring gland , a cylinder, a cover gasket, a lower valve seat and an upper valve core; the heating wire is arranged inside an 'O'-shaped tetrafluoro-piston sealing ring cut groove positioned on the piston; the piston press ring is arranged on the 'O'-shaped tetrafluoro-piston sealing ring cut groove; and the shaft elastic baffle ring is arranged on the piston press ring. By arranging the heating wire inside the 'O'-shaped tetrafluoro-piston sealing ring cut groove, the elastic force of the heating wire can be adopted to expand a contact surface of the tetrafluoro-piston sealing ring and the cylinder, and resolves the problem of poor contact sealing performance of the piston sealing ring inside the actuation mechanism and the cylinder to realize no leakage.

Description

The Pneumatic two-position cut-off valve

Technical field

The utility model relates to a kind of rubber manufacturing machinery Pneumatic two-position cut-off valve, and concrete is a kind of Pneumatic two-position cut-off valve that is applied in tyre vulcanizer.

Background technique

The Pneumatic two-position cut-off valve, be one of Automation Elements in the industrial processes, it is the actuator in the pneumatic unit combination instrument, the flowing medium of pipeline is opened or cut off to the signal that it comes according to instrument, as steam, water, oil, gas body etc., satisfy the requirement of system to pressure, temperature, measurement stool process parameter.

Existing Pneumatic two-position cut-off valve is made up of cut-off valve and pneumatic diaphragn actuating mechanism, perhaps is made up of cut-off valve and piston actuator.Cut-off valve is generally by valve body, upper valve base, lower valve base, compositions such as valve rod and upper valve core, and actuator is made up of with spring washer etc. piston, piston packing, compression piston ring, axle.

The piston packing of the actuator in the present Pneumatic two-position cut-off valve is not very tight with contacting of cylinder, cause actuator's sealing poor, and valve body and valve rod are because also there is the phenomenon of inner little leakage in the problem of filler, in addition, upper valve core, valve rod, seal ring make separate machined, do not have one concentric, a bit axial all the time or radial missing in the valve rod course of action, thereby cause upper valve core can not closely contact poor sealing performance with lower valve base.

In addition, in rubber manufacturing machinery,, make common Pneumatic two-position cut-off valve nitrogen sulfuration valve have the shortcoming of poor sealing performance, anti-unexpectedly high temperature because nitrogen sulfuration sealing and heatproof require far above air, water, oil, steam line medium.

The model utility content

The purpose of this utility model provides a kind of Pneumatic two-position cut-off valve, solves the problem of the contact seal poor performance of actuator's inner carrier seal ring and cylinder.

The purpose of this utility model provides a kind of Pneumatic two-position cut-off valve, solves valve body and valve rod because also there is the problem of the phenomenon of inner little leakage in the problem of filler.

The purpose of this utility model provides a kind of Pneumatic two-position cut-off valve, solves upper valve core and can not closely contact the problem of poor sealing performance with lower valve base.

The technological scheme that its technical problem that solves the utility model adopts is:

The Pneumatic two-position cut-off valve comprises piston actuator, cut-off valve; Piston actuator comprises piston, electric heating wire, piston packing, compression piston ring, circlip for shaft; Cut-off valve comprises filler underlay, filler, valve body, Gland, guard ring, big nut, support swivel nut, support, spring, spring capping, cylinder, Cover Gasket, lower valve base, upper valve core; Electric heating wire is arranged on " O " type tetrafluoro piston packing and cuts in the groove, and the tetrafluoro piston packing is enclosed within on the piston and compression piston ring is set above it, and the compression piston ring top is provided with circlip for shaft.

Described upper valve core comprises the seal ring of spool, hard sealing, and spool is " ten " word shape, and seal ring is placed on the step on spool " ten " cabinet frame, and this upper valve core is arranged on the valve rod termination, and described spool, valve rod, seal ring one are concentric.

Described filler comprises having the middle filler that cuts groove and have the last filler that cuts groove, and the filler underlay of soft seal, the middle filler of soft seal, last filler are put into valve body successively Gland is set again.

The beneficial effects of the utility model are,

1, owing to being arranged on " O " type tetrafluoro piston packing, cuts in the groove by electric heating wire, can adopt the elastic force of electric heating wire to enlarge the surface of contact of tetrafluoro piston packing and cylinder like this, the problem that solves actuator's inner carrier seal ring and the contact seal poor performance of cylinder realizes not having leakage.

2,,, be in no leak condition so, can both guarantee tight contact the between upper valve core and lower valve base valve port and seal no matter in course of action, whether exist axially or radial missing because spool, valve rod, the concentric being aligned of seal ring one.

3, since filler by the middle filler that cuts groove with have the last filler that cuts groove and form,, solve the problem of the little leakage in inside of valve body and valve rod existence so thereby the pressure of flowing medium enlarges it and realizes not having leakage with the surface of contact of valve body and valve rod in the reliable pipeline of filler.

4, because spool adopts hard sealing seal ring, so can improve the sealability and the resistance to high temperature of Pneumatic two-position cut-off valve in rubber manufacturing machinery, reduced the reject rate that quality that cost of production more improved product greatly reduces product for existing ripe nitrogen sulfuration pattern.

Description of drawings

Fig. 1 is an internal structure schematic representation of the present utility model;

1. valve bodies among the figure, 2. lower valve base, 3. hexagon nut, 4. interior hexagonal spiral shell head nail, 5. Cover Gasket, 6. backing plate, 7. upper valve core, 71. spools, 8. seal ring, 9. valve rod, 10. filler underlay, 11, filler on the filler, 1101., filler in 1102,12. Glands, 13. big nuts, 14. guard ring, 15. support swivel nuts, 16. supports, 17. spring, 18. spring cappings, 19. cylinders, 20. piston packing, 21. electric heating wire, 22. compression piston rings, 23. circlip for shaft, 24. piston, 25. piston actuators, 26. cut-off valves.

Embodiment

Please refer to Fig. 1, the utility model is made up of actuator 25, cut-off valve 26.

Piston actuator 25 comprises a piston 24, electric heating wire 21, piston packing 20, compression piston ring 22, circlip for shaft 23; Electric heating wire 21 embeds " O " type tetrafluoro piston packing 20 and cuts in the groove, again tetrafluoro piston packing 20 is placed on and puts compression piston ring 22 on the piston 24 again, then use circlip for shaft 23 to be buckled on the piston 24 above the compression piston ring 22 to fix, and then the piston 24 that installs is put into cylinder 19.The elastic force of employing electric heating wire 21 enlarges the surface of contact of tetrafluoro piston packing 20 and cylinder 19 like this, and the problem that solves the contact seal poor performance of actuator's 25 inner carrier seal rings 20 and cylinder 19 realizes the nothing leakage.

Cut-off valve 26 comprises filler underlay 10, filler 11, valve body 1,12 Glands, guard ring 14, big nut 13, support swivel nut 15, support 16, spring 17, spring capping 18, cylinder 19, Cover Gasket 5, lower valve base 2, upper valve core 7.Upper valve core 7 comprises the seal ring 8 of spool 71, hard sealing, spool 71 is " ten " word shape, seal ring 8 is placed on the step on spool 71 " ten " cabinet frames, upper valve core 7 is placed on valve rod 9 terminations again, and then puts backing plate 6 and then with 2 hexagon nuts 3 upper valve core 7 is fastened on the valve rod 9.Described spool 71, valve rod 9, the concentric numerical control of seal ring 7 one add cutter, make whole piece valve rod 8, spool 71 be in 3 unifications of concentric being aligned with seal ring 8, so no matter in course of action, whether have axial or radial missing, can both guarantee closely to contact between upper valve core 7 and lower valve base 2 valve ports and seal, be in no leak condition.The filler underlay 10 of soft seal, the middle filler 1102 of soft seal, last filler 1101 are put into valve body 1 successively and are put Gland 12 again, the described filler of being made up of middle filler 1102 and last filler 1,101 11 cuts groove through processing, and thereby the pressure of flowing medium enlarges filler 11 and realizes not having with the surface of contact of valve body 1 and valve rod 9 and leak in the tube road, solves the problem of the little leakage in inside that valve body 1 and valve rod 9 exist.After filler 11 is put well, again guard ring 14 is put into big nut 13.Be enclosed within the valve rod 9 that installed just now in the upper valve body from the bottom up, be screwed on the valve body 1 with the big nut 13 that installed just now then, support swivel nut 15 is screwed in the support 16, then 2 hexagonal socket nuts 3 of support 16 usefulness that install are fixed on the valve body 1, again spring 17 is put into support 16, then spring capping 18 is pressed in the upper end that is screwed in valve rod 9 on the spring 17, then the cylinder 19 that installed just now is screwed on the support 16.Then Cover Gasket 5 is placed on the lower valve base 2, covers then on valve body 1, carry out fastening with 4 interior hexagonal spiral shell spiral shell head nails 4 at last.

Working principle of the present utility model is to be made up of piston actuator 25 and cut-off valve 26 two-part, when no signal, pressure by spring 17 is closed in upper valve base spool 71, when the signal input is arranged, piston 24 promotes valve rod 9 and moves downward, and spool 71 is closed in lower valve base 2.

Claims (3)

1. the Pneumatic two-position cut-off valve comprises piston actuator, cut-off valve; Piston actuator comprises piston, electric heating wire, piston packing, compression piston ring, circlip for shaft; Cut-off valve comprises filler underlay, filler, valve body, Gland, guard ring, big nut, support swivel nut, support, spring, spring capping, cylinder, Cover Gasket, lower valve base, upper valve core; It is characterized in that: electric heating wire is arranged on " O " type tetrafluoro piston packing and cuts in the groove, and the tetrafluoro piston packing is enclosed within on the piston and compression piston ring is set above it, and the compression piston ring top is provided with circlip for shaft.

2. according to the described Pneumatic two-position cut-off valve of claim 1, it is characterized in that: described upper valve core comprises the seal ring of spool, hard sealing, spool is " ten " word shape, seal ring is placed on the step on spool " ten " cabinet frame, this upper valve core is arranged on the valve rod termination, and described spool, valve rod, seal ring one are concentric.

3. according to the described Pneumatic two-position cut-off valve of claim 1, it is characterized in that: described filler comprises having the middle filler that cuts groove and have the last filler that cuts groove, and the filler underlay of soft seal, the middle filler of soft seal, last filler are put into valve body successively Gland is set again.