CN203463697U - Phosphate removing injection valve capable of protecting sealing rings from being cut off - Google Patents

Abstract

The utility model provides a phosphate removing injection valve capable of protecting sealing rings from being cut off. The injection valve comprises a valve body, valve cores, pistons, valve sleeves, upper bearings, lower bearings, a cylinder body, a cylinder cover and the sealing rings; the valve body and the cylinder cover are respectively arranged on the lower part and the top of the injection valve; an upper air inlet/outlet and a lower air inlet/outlet are arranged in the cylinder body which is arranged between the valve body and the cylinder cover, so compression air is introduced by air valves to push the pistons; the pistons are fixedly connected with the valve cores; an inlet channel and an outlet channel are arranged on the valve body; an inner mouth of the outlet channel is arranged above an inner mouth of the inlet channel; a valve core water sealing ring is arranged between the two channels; an annular cavity communicated with the outlet channel is arranged in the valve body; a plurality of strip-shaped medium channels are arranged on the lower parts of the valve cores; and the bottom of one of the valve cores is communicated with the inlet channel of the valve body; and a valve core water sealing ring is arranged between the valve body and the cylinder cover. The diameters of the strip-shaped medium channels are smaller than the diameter of a body of one valve core, so when the valve cores are pulled, the strip-shaped body at the strip-shaped medium channels is just not in contact with the valve core water sealing ring, so the water sealing ring is protected from be scratched or cut off, and aging of the sealing rings caused by fatigue is slowed down.

Description

Can avoid the dephosphorization injection valve of seal ring excision

Technical field

The utility model relates to a kind of fluid injection valve, specifically relevant a kind of dephosphorization injection valve.

Background technique

Modern times, generally there was high pressure dephosphorization system in hot rolling steel plate factory, and its effect is the oxide layer of removing high-temperature steel plate surface.The dephosphorization medium of dephosphorization system is all water at present, and what whether control water discharged is a kind of pneumatic quick-acting valve that is called dephosphorization injection valve.High pressure water through supercharging is controlled by dephosphorization injection valve, is certain angle and rushes at high-temperature steel plate surface, effectively to remove oxide layer by special nozzle and high-temperature steel plate.Dephosphorization injection valve is mainly comprised of valve body, spool, valve pocket, upper bearing (metal), lower bearing, cylinder, cylinder cap and seal ring etc.In process of production, the keying frequency of dephosphorization injection valve is very high, and exhaustion run is shorter.The main failure forms of dephosphorization injection valve is spool heavy corrosion, and dephosphorization injection valve is leaked in a large number.The reason of spool heavy corrosion is due to seal ring lost efficacy.The failure mode of seal ring has normal wear and improper damage.Normal wear causes that the inefficacy of dephosphorization injection valve is easier to control, as long as change and can guarantee that dephosphorization injection valve is intact when closing on the ring wear exhaustion run limit.Improper damage has many reasons: have the reason of installation, medium reason, also have seal ring to be excised reason by spool.Because spool is a kind of hollow cylinder, nearly bottom is provided with a plurality of bar shaped medium channels, so that flowing medium can pass through from the inside of spool, as long as change the axial position of spool in valve body, just can make valve sentence and open or closed condition.When spool is in valve body bottom, for closing, while being in upper end, be unlatching.The medium of dephosphorization injection valve is realized isolation by seal ring, and seal ring is fixed in the groove of valve pocket inside.Because this seal ring is made by soft organic elastic material, thus in the process that spool is twitched in valve body, be in the part of spool bar shaped medium channel seal ring can the bar shaped medium channel because of a small amount of embedding people spool of elastic shrinkage in; Like this, seal ring is just easily by edge scratch or the excision of bar shaped medium channel.In addition, the part of seal ring in bar shaped medium channel shunk, and other parts are close to spool, and this has just accelerated the fatigue aging of seal ring.So the seal ring life-span of the valve of this spool generally can be not oversize, be therefore necessary to provide a kind of and can avoid scratch or excision seal ring, can slow down again the tired dephosphorization injection valve of seal ring.

Summary of the invention

The purpose of this utility model is to provide a kind of dephosphorization injection valve of avoiding seal ring excision, this injection valve can be avoided the drawback of the easy excision in the medium through hole edge of spool or scratch seal ring, can slow down the fatigue aging of seal ring again, recover seal ring due working life, thereby extend the exhaustion run of dephosphorization injection valve.

The technical solution of the utility model is achieved in that a kind of dephosphorization injection valve of avoiding seal ring excision, is connected, and comprises valve body, spool, piston, valve pocket, upper bearing (metal), lower bearing, cylinder block, cylinder cap and seal ring with outside air valve, wherein, valve body is in bottom, cylinder cap is in top, cylinder block is in the middle of valve body and cylinder cap, and be provided with on cylinder air inlet/outlet under the gentle cylinder of air inlet/outlet and promote piston to introduce pressurized air by air valve, piston is fixedly connected with spool, valve body is provided with inlet passage and outlet passage, the internal orifice of inlet passage is in bottom, the internal orifice of outlet passage is on inlet passage internal orifice, between two passages, there is spool waterstop ring that water is isolated, valve inner is provided with annular chamber, annular chamber is connected with outlet passage, spool is a hollow heavy wall cylindrical body, bottom is provided with a plurality of bar shaped medium channels, the bottom of spool is connected with the inlet passage of valve body, in the cylinder cap at spool top, be provided with pressure balance chamber, valve body and cylinder cap are provided with the spool waterstop ring of isolated high pressure water, the diameter at the bar shaped medium channel place of described dephosphorization injection valve spool is less than the diameter of spool entity, with the bar shaped entity at bar shaped medium channel place in spool twitch process, does not just contact with spool waterstop ring.

Preferably, from bar shaped medium channel cylndrical surface to spool entity cylndrical surface, by small angle transition, it is cone-shaped that transition region is.

Preferably, the upper base mouth of the cone of described transition region and the mouth of going to the bottom are smoothly connected with circular-arc respectively with two cylindrical surface.

The beneficial effects of the utility model are: owing to adopting such scheme, the cut dephosphorization injection valve of seal ring of avoiding of the present utility model, its spool can be avoided the slotted hole edge scratch of bar shaped medium channel or the drawback of excision waterstop ring of spool, can slow down the fatigue aging of seal ring again, therefore can make seal ring keep due working life, thereby extend the exhaustion run of dephosphorization injection valve.

Accompanying drawing explanation

Fig. 1 is the cut dephosphorization injection valve sectional view of an embodiment's of the utility model the seal ring avoided;

Fig. 2 be Fig. 1 work the left view of broken section; And

Fig. 3 is the partial enlarged drawing at the A place of Fig. 1.

Embodiment

For above-mentioned purpose of the present utility model, feature and advantage can be become apparent, below in conjunction with accompanying drawing, embodiment of the present utility model is elaborated.First it should be noted that, the utility model is not limited to following embodiment, the spirit that those skilled in the art should embody from following mode of execution is understood the utility model, and each technical term can be done wide, the most general understanding based on Spirit Essence of the present utility model.In figure, same or analogous member uses the same reference numerals to represent.

Fig. 1 and Fig. 2 illustrate a kind of structure of avoiding the dephosphorization injection valve of seal ring excision of an embodiment of the utility model, this dephosphorization injection valve is connected with outside air valve, and comprises valve body 1, spool 2, piston 9, valve pocket 3, upper bearing (metal) 4, lower bearing 5, cylinder block 6, cylinder cap 7 and a plurality of seal ring: spool waterstop ring 2a to 2d, hair net seal ring 3a, 3b, cylinder cap seal ring 8a, 8b, the inside and outside round seal ring 9a of piston, 9b and upper bearing (metal) seal ring 4a.

Wherein, valve body 1 is in bottom, cylinder cap 7 is in top, cylinder block 6 is between valve body 1 and cylinder cap 7, and be provided with on cylinder under air inlet/outlet 15 and cylinder air inlet/outlet 14 and promote piston 9 and move up and down to be introduced pressurized air by air valve, piston 9 is fixedly connected with and is integral with spool 2, valve body 1 is provided with inlet passage 10 and outlet passage 11, the internal orifice 10a of inlet passage 10 is in bottom, the internal orifice 11a of outlet passage 11 is on the internal orifice 10a of inlet passage 10, two path 10s, between 11, there is spool waterstop ring 2d that water is isolated, valve body 1 inside is provided with annular chamber 12, annular chamber 12 is connected with outlet passage 11, spool 2 is a hollow heavy wall cylindrical body, bottom is provided with a plurality of bar shaped medium channels 17, the bottom of spool 2 is connected with the inlet passage 10 of valve body 1, in the cylinder cap 7 at spool 2 tops, be provided with pressure balance chamber 13, valve body 1 is provided with cylinder cap 7 the spool waterstop ring 2a to 2c that completely cuts off high pressure water.The dephosphorization injection valve spool 2 of stating of the present utility model is arranged to the diameter that the diameter at its bar shaped medium channel 17 places is less than spool entity 18, with the bar shaped entity 18 at its bar shaped medium channel 17 places in spool 2 twitch processes, does not just contact with spool waterstop ring 2d.Preferably, from the cylndrical surface of bar shaped medium channel 17, to the cylndrical surface of spool entity 18, pass through small angle transition, transition region is small angular cone shape, and the upper base mouth of cone is smoothly connected with circular-arc respectively with two cylindrical surface with the mouth of going to the bottom.

Its open theory is: through the outside Air Valve Control of dephosphorization injection valve, pressurized air is entered in cylinder block 6 by air inlet/outlet under cylinder 14, make the upper air inlet/outlet 15 of cylinder block 6 discharge simultaneously, see Fig. 1, Fig. 2, piston 9 is pushed and moves upward under the effect of air pressure, because spool 2 is fixedly connected with piston 9, spool 2 is just followed piston 9 and is moved upward together, make spool 2 be in upper end, now the bar shaped medium channel 17 of spool 2 just communicates with annular chamber 12, high pressure water enters spool 2 inside from the spool bottom dielectric water intake 16 of spool 2, the high pressure water of spool 2 inside enters annular chamber 12 by bar shaped medium channel 17, then by outlet passage 11, send, while closing, the same outside Air Valve Control through dephosphorization injection valve, pressurized air is entered by cylinder block 6 by air inlet/outlet on cylinder 15, simultaneously, make air inlet/outlet 14 under cylinder discharge pressurized air, piston 9 band movable valve plugs 2 in cylinder 6, make spool 2 be returned to the bottom of valve body 1, now bar shaped medium channel 17 and inlet passage 10 are to logical, the cylndrical surface that the spool 1 at annular chamber 12 places is sealing, high pressure water is sealed by spool waterstop ring 2d, realized the isolated of inlet passage 10 and outlet passage 11, completed once complete keying, see Fig. 1, Fig. 2.When spool 2 is twitched up and down, bar shaped medium channel 17 must pass through spool waterstop ring 2d, because spool 2 is close to spool waterstop ring 2d, see Fig. 1, in the part spool waterstop ring 2d that the eliminates spool bar shaped medium channel 17 bar shaped medium channel 17 because of a small amount of embedding people spool 2 of elastic shrinkage, make spool waterstop ring 17 easily by edge scratch or the excision of bar shaped medium channel 24, a kind of diameter of avoiding the cut dephosphorization injection valve of seal ring to be designed to bar shaped medium channel 17 places of spool 2 of the present utility model is less than the diameter of spool 2 entities 18, see Fig. 1, Fig. 3, the bar shaped entity 18 at bar shaped medium channel 17 places in spool 2 twitch processes is not just contacted with spool waterstop ring 2d, so just eliminated spool waterstop ring 2d easily by the edge scratch of bar shaped medium channel 17 or the problem of excision, simultaneously, because spool waterstop ring 2d no longer contacts with the bar shaped entity 18 at bar shaped medium channel 17 places, in twitch process, spool waterstop ring 2d makes overall shrinkage, can effectively slow down the fatigue aging of spool waterstop ring 2d.Cylndrical surface from bar shaped medium Tong17 Dao Chu cylndrical surface to spool 2 entities 18 is with small angle transition, transition region is small angular cone shape, the upper base mouth of cone and the mouth of going to the bottom are smoothly connected with circular-arc respectively with two cylindrical surface, see Fig. 3, cone has good importing effect, guarantees that the twitch of spool 2 can not cause the flange of seal ring 2d lip.

In sum, the cut dephosphorization injection valve of seal ring of avoiding of the present utility model, its spool 2 can be avoided the slotted hole edge scratch of bar shaped medium channel 17 or the drawback of excision waterstop ring 2d of spool, can slow down the fatigue aging of seal ring 2d again, therefore can make seal ring 2d keep due working life, thereby extend the exhaustion run of dephosphorization injection valve.

Should be understood that those skilled in the art can make various changes or modifications the utility model after having read above-mentioned instruction content of the present utility model, these equivalent form of values fall within the application's appended claims limited range equally.

Claims (3)

1. the dephosphorization injection valve that can avoid seal ring excision, is connected with outside air valve, and comprises valve body, spool, piston, valve pocket, upper bearing (metal), lower bearing, cylinder block, cylinder cap and seal ring, wherein, valve body is in bottom, cylinder cap is in top, cylinder block is in the middle of valve body and cylinder cap, and be provided with on cylinder air inlet/outlet under the gentle cylinder of air inlet/outlet and promote piston to introduce pressurized air by air valve, piston is fixedly connected with spool, valve body is provided with inlet passage and outlet passage, the internal orifice of inlet passage is in bottom, the internal orifice of outlet passage is on inlet passage internal orifice, between two passages, there is spool waterstop ring that water is isolated, valve inner is provided with annular chamber, annular chamber is connected with outlet passage, spool is a hollow heavy wall cylindrical body, bottom is provided with a plurality of bar shaped medium channels, the bottom of spool is connected with the inlet passage of valve body, in the cylinder cap at spool top, be provided with pressure balance chamber, valve body and cylinder cap are provided with the spool waterstop ring of isolated high pressure water, it is characterized in that, the diameter at the bar shaped medium channel place of described dephosphorization injection valve spool is less than the diameter of spool entity, with the bar shaped entity at valve bar shaped medium channel place in spool twitch process, does not just contact with spool waterstop ring.

2. the dephosphorization injection valve of avoiding seal ring excision according to claim 1, is characterized in that, from bar shaped medium channel cylndrical surface to spool entity cylndrical surface, by small angle transition, it is cone-shaped that transition region is.

3. the dephosphorization injection valve of avoiding seal ring excision according to claim 1, is characterized in that, the upper base mouth of the cone of described transition region and the mouth of going to the bottom are smoothly connected with circular-arc respectively with two cylindrical surface.

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