CN203857053U - Pressure reducing valve - Google Patents
Pressure reducing valve Download PDFInfo
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- CN203857053U CN203857053U CN201420237513.XU CN201420237513U CN203857053U CN 203857053 U CN203857053 U CN 203857053U CN 201420237513 U CN201420237513 U CN 201420237513U CN 203857053 U CN203857053 U CN 203857053U
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- 239000012530 fluid Substances 0.000 claims abstract description 47
- 238000007789 sealing Methods 0.000 claims abstract description 19
- 230000009467 reduction Effects 0.000 claims description 76
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 12
- 229910002804 graphite Inorganic materials 0.000 claims description 12
- 239000010439 graphite Substances 0.000 claims description 12
- 238000009434 installation Methods 0.000 claims description 12
- 238000012856 packing Methods 0.000 claims description 7
- 229910001220 stainless steel Inorganic materials 0.000 claims description 7
- 239000010935 stainless steel Substances 0.000 claims description 7
- 238000010030 laminating Methods 0.000 claims description 6
- 229910052787 antimony Inorganic materials 0.000 claims description 4
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 claims description 4
- 238000005242 forging Methods 0.000 claims description 4
- 238000005121 nitriding Methods 0.000 claims description 4
- 238000002791 soaking Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 230000006837 decompression Effects 0.000 description 10
- 230000008859 change Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
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- 239000000463 material Substances 0.000 description 2
- 238000005272 metallurgy Methods 0.000 description 2
- 208000034189 Sclerosis Diseases 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000013036 cure process Methods 0.000 description 1
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- 239000004071 soot Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Lift Valve (AREA)
Abstract
The utility model provides a pressure reducing valve. The pressure reducing valve comprises a valve body, a valve seat, a bonnet, a valve stem, a valve clack and a sleeve, wherein the valve body is provided with a fluid channel; the fluid channel is divided into a flowing-in channel and a flowing-out channel by the valve seat; the bonnet covers the valve body and is provided with a guiding channel; the valve stem is movably arranged in the guiding channel; the valve clack is arranged at a working end of the valve stem and is also provided with a plurality of second throttling holes connected with the flowing-out channel; the second throttling holes are positioned in one end, which is close to the flowing-out channel, of a first sealing portion; the sleeve is arranged in the flowing-in channel; the sleeve sleeves the valve clack slidably; the valve clack is in sealing fit with the sleeve; two end surfaces of the sleeve are respectively connected with the valve seat and the bonnet hermetically; a plurality of first throttling holes which are connected with the flowing-in channel are formed in the two end surfaces of the sleeve; and when the valve stem moves, the first throttling holes can be connected with the second throttling holes. The pressure of fluid is reduced in a double-throttling manner by the pressure reducing valve through the first throttling holes and the second throttling holes; and the adjustable range of the output pressure of the pressure reducing valve is widened, so that the application range of the pressure reducing valve is widened.
Description
Technical field
The utility model relates to valve technology field, more particularly, relates to a kind of reduction valve.
Background technique
Reduction valve can carry out reduced pressure treatment to high parameter steam, makes vapor pressure reach production technology necessary requirement, is widely used in the industrial fields such as power station, petrochemical industry, Coal Chemical Industry, light textile, metallurgy.Be overcritical and the critical component of ultra supercritical unit, the performance quality of reduction valve directly affects unit safety operation and energy conversion efficiency.
Existing reduction valve mostly arranges throttle orifice on flap, and on flap, also has the sealed department that can contact with valve base sealing; When needs are closed reduction valve, the sealed department of flap is contacted with valve base sealing, and then block the fluid passage on valve body; When needs are opened reduction valve, by valve rod, drive flap to move, the throttle orifice on flap is communicated with the fluid passage of valve body, and then utilizes throttle orifice convection cell to reduce pressure.
But above-mentioned reduction valve only can utilize the throttle orifice on flap once to reduce pressure, and causes the adjustable extent of reduction valve delivery pressure less, has limited the application area of reduction valve.
In sum, how expanding the adjustable extent of reduction valve delivery pressure, to expand the application area of reduction valve, is current those skilled in the art technical problems urgently to be resolved hurrily.
Model utility content
In view of this, the purpose of this utility model is to provide a kind of reduction valve, to expand the adjustable extent of reduction valve delivery pressure, thus the application area of expansion reduction valve.
In order to achieve the above object, the utility model provides following technological scheme:
A reduction valve, comprising:
Valve body, offers fluid passage on described valve body, and described fluid passage has fluid inlet and fluid output;
Be arranged on the valve seat on described valve body, described valve seat is divided into flow channel and flow pass by described fluid passage;
Cover the valve gap on described valve body, described valve gap has the guide channel being communicated with described flow channel;
Be arranged on movably the valve rod in described guide channel, described valve rod coordinates with described valve bonnet seal;
Be arranged on the flap of described valve rod working end, described flap has first sealed department that can coordinate with described valve base sealing;
Wherein, be also provided with a plurality of second section discharge orifices that are communicated with described flow pass on described flap, described second section discharge orifice is positioned at described the first sealed department near one end of described flow pass;
Described reduction valve also comprises the sleeve being arranged in described flow channel, described flap is placed on described sleeve and coordinates with described sleeve seal slidably, two end faces of described sleeve are connected with described valve bonnet seal with described valve seat respectively, on described sleeve, be provided with a plurality of first segment discharge orifices that are communicated with described flow channel, and described valve rod can make described first segment discharge orifice and second section discharge orifice be communicated with while moving.
Preferably, in above-mentioned reduction valve, described first segment discharge orifice and described second section discharge orifice are many cribbings discharge orifice of arranging along the movement direction of described valve rod;
The cross sectional area of described flow channel is less than the cross sectional area of described flow pass.
Preferably, in above-mentioned reduction valve, described flap comprises:
The main valve clack coordinating with described sleeve seal, on described main valve clack, be provided with described second section discharge orifice and described the first sealed department, described main valve clack has and is communicated with described flow pass and the installation through hole of described sleeve near the cavity of described valve gap, and in described installation through hole, one end of close described flow pass is provided with spacing preiection;
Be arranged on the spacing plug screw of close described valve gap one end in described installation through hole, described spacing plug screw is set between described valve rod and described main valve clack, and described spacing plug screw has and is communicated with described installation through hole and described sleeve near the release through hole of the cavity of described valve gap;
Be limited in movably the secondary flap between described spacing plug screw and described spacing preiection, described secondary flap is set on described valve rod, and described secondary flap has the spacing shaft shoulder that can offset with described spacing plug screw near one end of described spacing plug screw, the other end has second sealed department that can be sealed and matched with described spacing preiection, when described secondary flap moves to the position that the described spacing shaft shoulder and described spacing plug screw offset, described release through hole is communicated with described flow pass;
Be coated at the dish spring of described secondary flap, described dish spring is between the described spacing shaft shoulder and described the second sealed department.
Preferably, in above-mentioned reduction valve, described the first sealed department is the first male cone (strobilus masculinus) that is arranged on described main valve clack, and the inwall of described valve seat has the first inner conical surface, when described reduction valve cuts out described in the first inner conical surface and described the first male cone (strobilus masculinus) sealing laminating;
Described the second sealed department is the second male cone (strobilus masculinus) being arranged on described secondary flap, and the inwall of described spacing preiection has the second inner conical surface, when described reduction valve work described in the second inner conical surface and described the second male cone (strobilus masculinus) sealing laminating.
Preferably, in above-mentioned reduction valve, have the guiding clearance of 0.45mm-0.65mm between described main valve clack and described sleeve, and by stable steering ring, be sealed and matched between the two, described stable steering ring is for soaking antimony graphite annulus.
Preferably, in above-mentioned reduction valve, described valve body has the valve port between described flow channel and described flow pass, and described valve port is provided with overlap joint groove near one end of described flow channel, and described valve seat is overlapped on described overlap joint groove and by seal ring and coordinates with described sealing valve port.
Preferably, in above-mentioned reduction valve, the guide channel of described valve rod is provided with flexible graphite packing in the one end near described flow channel, and described valve rod coordinates with described valve bonnet seal by described flexible graphite packing.
Preferably, above-mentioned reduction valve also comprises the electrohydraulic control for driving described valve rod to move, and described electrohydraulic control is connected by jointing with described valve rod, and described electrohydraulic control adopts flange to be connected with described valve gap.
Preferably, above-mentioned reduction valve also comprises the suction flange that is arranged on described fluid inlet and the outlet(discharge) flange that is arranged on described fluid output, the central axis conllinear of the central axis of described suction flange and described outlet(discharge) flange, and described suction flange all adopts butt welding to be fixedly connected with described valve body with described outlet(discharge) flange.
Preferably, in above-mentioned reduction valve, described valve seat is cemented carbide seat, and described sleeve is S22253 two-phase stainless steel cylinder, and described valve body and described valve gap are forging; Described flap and described valve rod are the 90Cr18MoV stainless steel part of nitriding treatment.
From above-mentioned technological scheme, can find out, the reduction valve that the utility model provides comprises valve body, valve seat, valve gap, valve rod, flap and sleeve; Wherein, offer fluid passage on valve body, this fluid passage has fluid inlet and fluid output; Valve seat is arranged on valve body, and valve seat is divided into flow channel and flow pass by above-mentioned fluid passage; Valve gap covers on valve body, and valve gap has the guide channel being communicated with flow channel; Valve rod is arranged in above-mentioned guide channel movably, and valve rod coordinates with valve bonnet seal; Flap is arranged on the working end of valve rod, and flap has first sealed department that can coordinate with valve base sealing, is also provided with a plurality of second section discharge orifices that are communicated with flow pass on flap, and second section discharge orifice is positioned at the first sealed department near one end of flow pass; Sleeve is arranged in flow channel, flap is placed on sleeve and coordinates with sleeve seal slidably, two end faces of sleeve are connected with valve bonnet seal with valve seat respectively, on sleeve, be provided with a plurality of first segment discharge orifices that are communicated with flow channel, and valve rod can make first segment discharge orifice and second section discharge orifice be communicated with while moving.
Above-mentioned reduction valve is when work, by mobile valve rod, drive flap to move to the direction away from valve seat, and then first segment discharge orifice and second section discharge orifice are communicated with, valve open now, fluid enters flow channel by fluid inlet, by the first segment discharge orifice on sleeve, realizes once adjustable decompression, then through the second section discharge orifice of flap, realizes the adjustable decompression of secondary, finally enter flow pass, by fluid output, flowed out.
Reduction valve of the present utility model has been realized double throttle decompression by first segment discharge orifice and second section discharge orifice convection cell, and this reduction valve can change the first segment discharge orifice opened and the number of second section discharge orifice by flap being moved to different positions, and then change orifice size, flow velocity and the kinetic energy of fluid are changed, cause the different pressure losses, thereby it is adjustable to realize decompression; So reduction valve of the present utility model can expand the adjustable extent of reduction valve delivery pressure, thereby expanded the application area of reduction valve.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is embodiments more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of the reduction valve that provides of the utility model embodiment;
Fig. 2 is the local amplification assumption diagram of A in Fig. 1;
Fig. 3 be the reduction valve that provides of the utility model embodiment when opening internal flow flow to schematic diagram;
Fig. 4 is the part-structure schematic diagram of the reduction valve that provides of the utility model embodiment.
Embodiment
The utility model embodiment provides a kind of reduction valve, has expanded the adjustable extent of reduction valve delivery pressure, thereby has expanded the application area of reduction valve.
For making the utility model embodiment's object, technological scheme and advantage clearer, below in conjunction with the accompanying drawing in the utility model embodiment, technological scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, rather than whole embodiments.Embodiment based in the utility model, those of ordinary skills are not making the every other embodiment who obtains under creative work prerequisite, all belong to the scope of the utility model protection.
Please refer to accompanying drawing 1-4, the reduction valve that the utility model embodiment provides comprises valve body 1, valve seat 9, valve gap 4, valve rod 3, flap 5 and sleeve 8; Wherein, on valve body 1, offer fluid passage, this fluid passage has fluid inlet and fluid output; Valve seat 9 is arranged on valve body 1, and valve seat 9 is divided into flow channel 11 and flow pass 12 by above-mentioned fluid passage; Valve gap 4 covers on valve body 1, and valve gap 4 has the guide channel being communicated with flow channel 11; Valve rod 3 is arranged in above-mentioned guide channel movably, and valve rod 3 is sealed and matched with valve gap 4; Flap 5 is arranged on the working end of valve rod 3, flap 5 has first sealed department that can be sealed and matched with valve seat 9, on flap 5, be also provided with a plurality of second section discharge orifices 55 that are communicated with flow pass 12, second section discharge orifice 55 is positioned at the first sealed department near one end of flow pass 12; Sleeve 8 is arranged in flow channel 11, flap 5 is placed on sleeve 8 and is sealed and matched with sleeve 8 slidably, two end faces of sleeve 8 are tightly connected with valve seat 9 and valve gap 4 respectively, on sleeve 8, be provided with a plurality of first segment discharge orifices 81 that are communicated with flow channel 11, and valve rod 3 can make first segment discharge orifice 81 and second section discharge orifice 55 be communicated with while moving.Concrete, the utility model compresses valve seat 9 and sleeve 8 sealings by valve gap 4, and two end faces of sleeve 8 are tightly connected with valve seat 9 and valve gap 4 respectively, relatively simple for structure, is convenient to assembling.
Above-mentioned reduction valve is when work, by mobile valve rod 3, drive flap 5 mobile to the direction away from valve seat 9 (being the top in Fig. 1), and then first segment discharge orifice 81 and second section discharge orifice 55 are communicated with, valve open now, fluid enters flow channel 11 by fluid inlet, by the first segment discharge orifice 81 on sleeve 8, realizes once adjustable decompression, then through the second section discharge orifice 55 of flap 5, realizes the adjustable decompression of secondary, finally enter flow pass 12, by fluid output, flowed out.
Reduction valve of the present utility model has been realized double throttle decompression by first segment discharge orifice 81 and second section discharge orifice 55 convection cells, and this reduction valve can change the first segment discharge orifice 81 opened and the number of second section discharge orifice 55 by flap 5 being moved to different positions, and then change orifice size, flow velocity and the kinetic energy of fluid are changed, cause the different pressure losses, thereby it is adjustable to realize decompression; So reduction valve of the present utility model can expand the adjustable extent of reduction valve delivery pressure, thereby expanded the application area of reduction valve, this reduction valve adopts the step-down of porous secondary to increase decompression amplitude simultaneously, has also guaranteed the long-term abrasion resistance of each parts in valve.
In addition, the utility model can regulate the number of opening of first segment discharge orifice 81 and second section discharge orifice 55 by mobile flap 5, thereby makes flap 5 have good adjusting molded line, can do the Flow characteristicss such as linear, equal percentage and parabola.Above-mentioned reduction valve can also reduce the leakage rate of valve by the cooperation of flap 5, valve seat 9 and sleeve 8 simultaneously, and valve leak grade reaches IV level.Reduction valve of the present utility model is applicable to steam flow 50t/h-410t/h, inlet steam pressure p 1≤32MPa, inlet steam temperature t1≤629 ℃, outlet vapor pressure p2=0.5MPa-6MPa, the occasion of outlet steam temperature t2=200 ℃-530 ℃; Be mainly used in high pressure turbine by, low-pressure bypass system, soot blowing reducing station system and the 300MW of 1000MW ultra supercritical unit, the extraction for heat supply system of 600MW unit.
Preferably, above-mentioned first segment discharge orifice 81 and second section discharge orifice 55 are many cribbings discharge orifice of arranging along the movement direction of valve rod 3; The utility model is evenly arranged and throttle orifice of the same size first segment discharge orifice 81 and 55 employings of second section discharge orifice, convenient processing; Guaranteed throttling performance, pressure regulating performance is good simultaneously.
Meanwhile, the cross sectional area of flow channel 11 is less than the cross sectional area of flow pass 12.So, flow pass 12 volume ratio flow channel 11 volumes of reduction valve are large, and fluid inlet is larger than fluid inlet, can make fluid flow more stable, reduce noise.
As shown in Figure 3, when fluid is steam, the Pressure reducing ratio β=p2/p1 of reduction valve of the present utility model (p1 is inlet steam, and p2 is outlet steam) can reach 0.3, realizes critical Pressure reducing ratio, and integrated flow rate, flow velocity and noise reach the optimum state.This reduction valve has the features such as good reliability, throttling performance is excellent, pressure regulating performance is good, is specially adapted to changes in flow rate large if Flow-rate adjustment is than 100:1, fast the operating mode of frequent operation.
In the utility model one specific embodiment, flap 5 comprises main valve clack 51, spacing plug screw 53, secondary flap 52 and dish spring 54, as shown in Figure 2, main valve clack 51 is sealed and matched with sleeve 8, on main valve clack 51, be provided with above-mentioned second section discharge orifice 55 and the first sealed department, main valve clack 51 has connection flow pass 12 and the installation through hole of sleeve 8 near the cavity of valve gap 4, and the one end (being the bottom that through hole is installed in Fig. 2) near flow pass 12 in this installation through hole is provided with spacing preiection; Spacing plug screw 53 is arranged on to be installed in through hole near valve gap 4 one end (being the top that through hole is installed in Fig. 2) and is set between valve rod 3 and main valve clack 51, and spacing plug screw 53 has and is communicated with installation through hole and sleeve 8 near the release through hole of the cavity (being the epicoele of Fig. 2 middle sleeve 8) of valve gap 4; Secondary flap 52 is limited in movably between spacing plug screw 53 and spacing preiection and is set on valve rod 3, and secondary flap 52 has the spacing shaft shoulder that can offset with spacing plug screw 53 near one end (being the top of spacing plug screw 53 in Fig. 2) of spacing plug screw 53, the other end (being the bottom of spacing plug screw 53 in Fig. 2) has second sealed department that can be sealed and matched with spacing preiection, when secondary flap 52 moves to the position that the spacing shaft shoulder and spacing plug screw 53 offset, release through hole is communicated with flow pass 12; Dish spring 54 is coated at secondary flap 52 and between the spacing shaft shoulder and the second sealed department.Concrete, for the ease of processing, in the present embodiment, valve rod 3 is overall structure with secondary flap 52.
The utility model adopts the flap 5 being combined by main valve clack 51 and secondary flap 52, when on when moving valve rod 3 and opening reduction valve or regulate Pressure reducing ratio, secondary flap 52 moves on first the spacing shaft shoulder and spacing plug screw 53 is offseted, now release through hole is opened, fluid can enter in the epicoele of sleeve 8 by this release through hole, improve the negative pressure state in sleeve 8 epicoeles, be conducive to the excessive implementation capacity of balance flap 5, reduced the required active force applying; Follow secondary flap 52 and drive main valve clacks 51 to move or move down on together, be convenient to upwards lift flap 5, and then be convenient to the adjusting of reduction valve; After valve regulated is good, moving down valve rod 3 makes secondary flap 52 be displaced downwardly to separately the second sealed department and spacing preiection is sealed and matched again, thereby release through hole is blocked, can avoid fluid from release through hole, to flow into the epicoele of sleeve 8, and then guarantee that fluid only can enter second section discharge orifice 55 from first segment discharge orifice 81, inflow and outflow passage 12 again, improved operational reliability.
Above-mentioned dish spring 54 can reduce the dead band idle stroke of valve rod 3 while regulating, and the dead band of having eliminated flap stroke Shang Xia 5, has improved functional reliability.
In summary, above-mentioned flap 5 structures can reduce the active force that need to apply in frequent adjustment process rapidly, have effectively reduced the hoisting capacity of valve in opening and closing; The position of being simultaneously convenient to regulate by a small margin flap 5, is conducive to Small Flow Control, and is conducive in valve, realize less decompression, reduces noise, reduces valve rod 3 jam phenomenons.In addition, above-mentioned flap 5 has the power of closing preferably, can effectively control leak-down rate.
Preferably, the first sealed department is the first male cone (strobilus masculinus) that is arranged on main valve clack 51, and the inwall of valve seat 9 has the first inner conical surface, the first inner conical surface and the first male cone (strobilus masculinus) sealing laminating when reduction valve cuts out; The second sealed department is the second male cone (strobilus masculinus) being arranged on secondary flap 52, and the inwall of spacing preiection has the second inner conical surface, the second inner conical surface and the second male cone (strobilus masculinus) sealing laminating when reduction valve is worked.In the present embodiment, between valve seat 9 and main valve clack 51 and secondary flap 52 and main valve clack 51, all adopt conical surface seal, there is good sealing surface, sealability is better, has the feature of the little and resistance to erosion of seal pressure, both can make adjustments valve, can make cut-off valve again, simultaneously relatively simple for structure, be convenient to processing.
Further, have the guiding clearance of 0.45mm-0.65mm between main valve clack 51 and sleeve 8, and by stable steering ring 10, be sealed and matched between the two, stable steering ring 10 is for soaking antimony graphite annulus.Between above-mentioned main valve clack 51 and sleeve 8, be provided with guiding clearance, in guiding clearance, be provided with and soak antimony graphite annulus, can either play good leading role, also there is good balanced seal effect, be conducive to slow down vibration and the impact of main valve clack 51, upper and lower stroke is reliable simultaneously.
As shown in Figure 2, valve body 1 has the valve port between flow channel 11 and flow pass 12, and valve port is provided with overlap joint groove near one end (being the top of valve port) of flow channel 11, and valve seat 9 is overlapped on overlap joint groove and coordinates with sealing valve port by seal ring.The present embodiment, by valve seat 9 is overlapped on valve port, has been realized the fixing of valve seat 9, is convenient to the replacing of valve seat 9, is convenient to the processing of valve seat 9 and valve port simultaneously.
Preferably, the guide channel of valve rod 3 is provided with flexible graphite packing in the one end (being the bottom of guide channel) near flow channel 11, and valve rod 3 is sealed and matched by flexible graphite packing and valve gap 4.The utility model arranges flexible graphite packing in valve rod 3 and motive sealing place of valve gap 4, is specially the Expanded graphite that adds fiber and expansion, has good sealing and wear resistance.
Further, valve body 1 adopts gasket seal flange bolt structure to be connected with valve gap 4, good airproof performance, and voltage endurance capability is high.
For the ease of operating valve lever 3, above-mentioned reduction valve also comprises the electrohydraulic control 2 moving for actuate valve stem 3, and this electrohydraulic control 2 is connected by jointing with valve rod 3, and electrohydraulic control 2 adopts flange to be connected with valve gap 4.The present embodiment moves by electrohydraulic control 2 band ovable valve stems 3, and then realizes the Pressure reducing ratio of opening and closing valve or adjusting reduction valve, has saved manpower; The power of electrohydraulic control 2 is larger simultaneously, is conducive to main valve clack 51, the tight closing of secondary flap 52 and the operation of valve and opens.Above-mentioned electrohydraulic control 2 is also replaceable is the actuator of electronic control or the actuator of pneumatic control, as cylinder or electric pushrod etc.
For the ease of the installation of reduction valve, reduction valve also comprises the suction flange 7 that is arranged on fluid inlet and the outlet(discharge) flange 6 that is arranged on fluid output.Preferably, the central axis conllinear of the central axis of above-mentioned suction flange 7 and outlet(discharge) flange 6, namely valve adopts and puts down into the symmetric form of clearing, and as shown in Figure 1, fluid enters from left side, from right side, flows out, and can reduce the impact force that valve is subject to.
Above-mentioned suction flange 7 all adopts butt welding to be fixedly connected with valve body 1 with outlet(discharge) flange 6, has improved the join strength of suction flange 7 and outlet(discharge) flange 6 and valve body 1, and voltage endurance capability is strong, and the High Temperature High Pressure that can effectively resist medium is washed away and the material alternating stress that produces.
In order further to optimize technique scheme, valve seat 9 is cemented carbide seat, concrete, and valve seat 9 adopts corrosion resistance, anti abrasive integral sintered cemented carbide, and hardness reaches HRA88, corrosion resistance, wear-resistant good.Greatly extended working life with sleeve 8 and flap 5 combinations.
Sleeve 8 is two-phase stainless steel cylinder, concrete, and sleeve 8 adopts two phase stainless steel+cure process, and whole sclerosis thickness is 1mm-1.5mm, and combination is metallurgy combination, corrosion resistance, wear-resistant good.
Valve body 1 and valve gap 4 are forging, concrete, and valve body 1, valve gap 4 all adopt the F91/F92 forging material of high-strength high temperature-resistant high pressure, have improved the strength and stiffness of valve skeleton, are enough to resist the operating fatigue of duty parameter and alternating stress.
Flap 5 and valve rod 3 are the 90Cr18MoV stainless steel part of nitriding treatment.The utility model is by two main movable pieces of reduction valve---flap 5 and valve rod 3 are all selected 90Cr18MoV+ nitriding treatment, and expansion coefficient is less, can operate in high low-load, high frequency, prevent jam, have guaranteed reliability of operation.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and each embodiment stresses is the difference with other embodiments, between each embodiment identical similar part mutually referring to.
Above-mentioned explanation to the disclosed embodiments, makes professional and technical personnel in the field can realize or use the utility model.To these embodiments' multiple modification, will be apparent for those skilled in the art, General Principle as defined herein can, in the situation that not departing from spirit or scope of the present utility model, realize in other embodiments.Therefore, the utility model will can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. a reduction valve, comprising:
Valve body (1), described valve body offers fluid passage on (1), and described fluid passage has fluid inlet and fluid output;
Be arranged on the valve seat (9) on described valve body (1), described valve seat (9) is divided into flow channel (11) and flow pass (12) by described fluid passage;
Cover the valve gap (4) on described valve body (1), described valve gap (4) has the guide channel being communicated with described flow channel (11);
Be arranged on movably the valve rod (3) in described guide channel, described valve rod (3) is sealed and matched with described valve gap (4);
Be arranged on the flap (5) of described valve rod (3) working end, described flap (5) has first sealed department that can be sealed and matched with described valve seat (9);
It is characterized in that, on described flap (5), be also provided with a plurality of second section discharge orifices (55) that are communicated with described flow pass (12), described second section discharge orifice (55) is positioned at described the first sealed department near one end of described flow pass (12);
Described reduction valve also comprises the sleeve (8) being arranged in described flow channel (11), described flap (5) is placed on described sleeve (8) and is sealed and matched with described sleeve (8) slidably, two end faces of described sleeve (8) are tightly connected with described valve seat (9) and described valve gap (4) respectively, on described sleeve (8), be provided with a plurality of first segment discharge orifices (81) that are communicated with described flow channel (11), and described valve rod (3) can make described first segment discharge orifice (81) and second section discharge orifice (55) connection when mobile.
2. reduction valve as claimed in claim 1, is characterized in that, described first segment discharge orifice (81) and described second section discharge orifice (55) are many cribbings discharge orifice of arranging along the movement direction of described valve rod (3);
The cross sectional area of described flow channel (11) is less than the cross sectional area of described flow pass (12).
3. reduction valve as claimed in claim 1, is characterized in that, described flap (5) comprising:
The main valve clack (51) being sealed and matched with described sleeve (8), on described main valve clack (51), be provided with described second section discharge orifice (55) and described the first sealed department, described main valve clack (51) has the installation through hole of the cavity that is communicated with described flow pass (12) and the close described valve gap (4) of described sleeve (8), and the one end near described flow pass (12) in described installation through hole is provided with spacing preiection;
Be arranged on the spacing plug screw (53) of close described valve gap (4) one end in described installation through hole, described spacing plug screw (53) is set between described valve rod (3) and described main valve clack (51), and described spacing plug screw (53) has the release through hole of the cavity that is communicated with described installation through hole and the close described valve gap (4) of described sleeve (8);
Be limited in movably the secondary flap (52) between described spacing plug screw (53) and described spacing preiection, described secondary flap (52) is set on described valve rod (3), and described secondary flap (52) has the spacing shaft shoulder that can offset with described spacing plug screw (53) near one end of described spacing plug screw (53), the other end has second sealed department that can be sealed and matched with described spacing preiection, when described secondary flap (52) moves to the position that the described spacing shaft shoulder and described spacing plug screw (53) offset, described release through hole is communicated with described flow pass (12);
Be coated at the dish spring (54) of described secondary flap (52), described dish spring (54) is between the described spacing shaft shoulder and described the second sealed department.
4. reduction valve as claimed in claim 3, it is characterized in that, described the first sealed department is for being arranged on the first male cone (strobilus masculinus) of described main valve clack (51), and the inwall of described valve seat (9) has the first inner conical surface, when described reduction valve cuts out described in the first inner conical surface and described the first male cone (strobilus masculinus) sealing laminating;
Described the second sealed department is for to be arranged on the second male cone (strobilus masculinus) on described secondary flap (52), and the inwall of described spacing preiection has the second inner conical surface, when described reduction valve work described in the second inner conical surface and described the second male cone (strobilus masculinus) sealing laminating.
5. reduction valve as claimed in claim 4, it is characterized in that, the guiding clearance between described main valve clack (51) and described sleeve (8) with 0.45mm-0.65mm, and by stable steering ring (10), be sealed and matched between the two, described stable steering ring (10) is for soaking antimony graphite annulus.
6. reduction valve as claimed in claim 1, it is characterized in that, described valve body (1) has the valve port being positioned between described flow channel (11) and described flow pass (12), described valve port is provided with overlap joint groove near one end of described flow channel (11), and described valve seat (9) is overlapped on described overlap joint groove and by seal ring and coordinates with described sealing valve port.
7. reduction valve as claimed in claim 1, it is characterized in that, the guide channel of described valve rod (3) is provided with flexible graphite packing in the one end near described flow channel (11), and described valve rod (3) is sealed and matched by described flexible graphite packing and described valve gap (4).
8. reduction valve as claimed in claim 1, it is characterized in that, also comprise for driving the mobile electrohydraulic control (2) of described valve rod (3), described electrohydraulic control (2) is connected by jointing with described valve rod (3), and described electrohydraulic control (2) adopts flange to be connected with described valve gap (4).
9. reduction valve as claimed in claim 1, it is characterized in that, also comprise the suction flange (7) that is arranged on described fluid inlet and the outlet(discharge) flange (6) that is arranged on described fluid output, the central axis conllinear of the central axis of described suction flange (7) and described outlet(discharge) flange (6), and described suction flange (7) all adopts butt welding to be fixedly connected with described valve body (1) with described outlet(discharge) flange (6).
10. the reduction valve as described in claim 1-9 any one, is characterized in that, described valve seat (9) is cemented carbide seat, and described sleeve (8) is S22253 two-phase stainless steel cylinder, and described valve body (1) and described valve gap (4) are forging; Described flap (5) and described valve rod (3) are the 90Cr18MoV stainless steel part of nitriding treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420237513.XU CN203857053U (en) | 2014-05-09 | 2014-05-09 | Pressure reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420237513.XU CN203857053U (en) | 2014-05-09 | 2014-05-09 | Pressure reducing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203857053U true CN203857053U (en) | 2014-10-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420237513.XU Expired - Lifetime CN203857053U (en) | 2014-05-09 | 2014-05-09 | Pressure reducing valve |
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| Country | Link |
|---|---|
| CN (1) | CN203857053U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939624A (en) * | 2014-05-09 | 2014-07-23 | 杭州华惠阀门有限公司 | Reducing valve |
| CN114251512A (en) * | 2021-12-08 | 2022-03-29 | 西安热工研究院有限公司 | Low pressure side sealed pre-opening type multi-stage pressure reducing device |
-
2014
- 2014-05-09 CN CN201420237513.XU patent/CN203857053U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939624A (en) * | 2014-05-09 | 2014-07-23 | 杭州华惠阀门有限公司 | Reducing valve |
| CN114251512A (en) * | 2021-12-08 | 2022-03-29 | 西安热工研究院有限公司 | Low pressure side sealed pre-opening type multi-stage pressure reducing device |
| CN114251512B (en) * | 2021-12-08 | 2024-06-04 | 西安热工研究院有限公司 | Pre-opening type multistage pressure reducing device with low-pressure side seal |
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