CN201103730Y - Corrosion resistant scale overflow valve used for high-pressure small-flow equipment - Google Patents
Corrosion resistant scale overflow valve used for high-pressure small-flow equipment Download PDFInfo
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- CN201103730Y CN201103730Y CNU2007201900332U CN200720190033U CN201103730Y CN 201103730 Y CN201103730 Y CN 201103730Y CN U2007201900332 U CNU2007201900332 U CN U2007201900332U CN 200720190033 U CN200720190033 U CN 200720190033U CN 201103730 Y CN201103730 Y CN 201103730Y
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- corrosion
- proportional pressure
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Abstract
The utility model relates to an overflow valve, in particular to a corrosion resistance overflow valve used in a high-pressure and small flow device, which comprises the overflow valve and a regulating device, wherein, the regulating device is an electricity-gas proportion pressure valve; a flexible membrane going against a pressure adjusting spring is arranged at the pressure adjusting spring in the valve body of the overflow valve; an air chamber is formed at the top of the valve body and the flexible membrane; an air inlet communicated with an output hole of the electricity-gas proportion pressure valve is arranged at the air chamber; the air inlet of the electricity-gas proportion pressure valve is connected with a high-pressure gas source. The overflow valve has the advantages of simple structure, sensitive reaction, good sealing performance and convenient adjustment and controlling of the proportion.
Description
Technical field
The utility model relates to a kind of proportional pressure control valve, particularly a kind of corrosion-resistant proportional pressure control valve that is used for high-pressure low-flow equipment.
Background technique
Proportional pressure control valve is a kind of device that control apparatus is regulated fluid pressure that is used for, and is generally used for hydraulic system.Its structure comprises relief valve 1 and regulating controller 2 as shown in Figure 1, and described relief valve 1 is made of valve body 11, valve seat 12, the spool 14 with valve plug 13 and pressure adjusting spring 15.Wherein, described valve body 11 is one to have the interior drum shape member of upper base, the lower ending opening of valve body 11 and described valve seat 12 are affixed, the center of valve seat 12 is provided with overflow inlet 16, in the interior drum that described spool 14 sealed sliding with valve plug 13 are located at, described valve plug 13 is taper, and over against described overflow inlet 16, described pressure adjusting spring 15 is located at the top of spool 14, the upper base center of drum is provided with a through hole 17 in the described valve body 11, described regulating controller 2 is located at the upper base outside of drum in the valve body 11, and apply pressure to described spool 14 by stretch into pressure regulation bar 18 in the valve body 11 and pressure adjusting spring 15 by through hole 17, make the described overflow inlet 16 of cone-shaped valve plug 13 sealings, form overflow chamber 18 between described spool 14 and the described valve seat 12, the side of valve body 11 is provided with the overflow outlet 19 that is communicated with described overflow chamber 18.Described regulating controller 2 adopts proportion electro-magnet, digital pulse controlling device, step motor control to put on the pressure on the spool 14 usually, when fluid pressure in the equipment surpasses the regulation and control pressure that sets, the valve plug 13 of relief valve is backed down, in the equipment liquid will by relief valve discharge and pressure release to keep pressure stability in the hydraulic equipment.
And in chemical analysis, medicine manufacturing and Medical Instruments, often also need analyzed sample, reagent carries out pressure to be regulated.These samples and reagent often are different from the special media of the medium in the general hydraulic system, if Korrosionsmedium then requires the material of used making relief valve must possess outstanding corrosion-resistant and chemical stability.If described medium is to cost an arm and a leg or the toxic substance of harmfulness is arranged, then the leakage rate to relief valve has proposed harsh requirement; Rate-of flow related in these equipment and instruments uses is all very little, at pressure is under the condition of 35Mpa, per minute is 0.02ml (peak rate of flow under a lot of situations is also littler than the leakage rate of industrial permission) only, and requires the pressure can be adjustable continuously within the specific limits and reaction velocity is sensitive.Owing to be that precision, reliability also will satisfy its corresponding industry standard at analysis and medical industry.
At present with regard to control valve, the mode that above-mentioned used ratio is regulated--control, step motor control are regulated in proportion electro-magnet control, digital pulse---all exist narrow limitation: proportion electro-magnet control is the most ripe, but what use in the high pressure range at present is wet type substantially, for the dry type proportion electro-magnet that uses under the condition of high voltage, because the pressure reduction of sliding valve core both sides is very big, sealing problem is difficult to solve.The digital pulse mode is controlled and is existed the minimum leakage amount too and can not satisfy usage requirement.Stepper motor also exists the response time oversize from control, can not satisfy the adjusting needs of small flow.
The utility model requires the design difficulty of the relief valve that provides mainly to concentrate on two aspects: 1, the ratio of high-pressure low-flow is regulated; 2, the solution of material and sealing; These two problems are interrelated again simultaneously.Ripe ratio regulation technology relates to the restriction of material seal, can't use in this example.And good material and the sealing of some chemical stabilities has very big narrow limitation on processing and structure.
The corrosion-resistant proportional pressure control valve that how to design and manufacture the high-pressure low-flow that can satisfy above-mentioned technical requirements is the difficult problem of pendulum in face of the relief valve manufacturing.
Summary of the invention
Technical problem to be solved in the utility model is, at the above-mentioned deficiency of prior art, and provide a kind of be used for flow minimum, pressure is adjustable continuously within the specific limits, and the proportional pressure control valve of the high-pressure low-flow of reaction velocity sensitivity.
Another purpose of the present utility model also be further to provide a kind of be used to corrode or the poisonous and harmful medium, that flow is minimum, pressure is adjustable continuously within the specific limits, and the corrosion-resistant proportional pressure control valve of the high-pressure low-flow of reaction velocity sensitivity.
The corrosion-resistant proportional pressure control valve of high-pressure low-flow provided by the utility model is realized by following technological scheme.
A kind of corrosion-resistant proportional pressure control valve that is used for high-pressure low-flow equipment, comprise relief valve and regulating controller, described relief valve comprises: have the valve body of overflow outlet, the valve seat with overflow inlet, the sealed sliding that is fixedly arranged on valve body lower end is located at being provided with over against the spool of the valve plug of overflow inlet in the valve body, apply pressure to pressure adjusting spring on the spool; It is characterized in that: described regulating controller is electricity-gas proportional pressure valve, be provided with the flexible membrane of roof pressure pressure adjusting spring in the top of described relief valve valve body internal pressure-regulating spring, one air chamber is formed at the top of described flexible membrane and described valve body, described air chamber is provided with inlet hole, inlet hole on the described air chamber connects the delivery outlet of described electricity-gas proportional pressure valve, and the suction port of described electricity-gas proportional pressure valve connects high-pressure air source.
Except that above-mentioned essential features, in specific implementation process, also can replenish following technology contents.
The described corrosion-resistant proportional pressure control valve that is used for high-pressure low-flow equipment is characterized in that: also be provided with air leakage hole and guide line on electricity-gas proportional pressure valve; Or also be provided with air leakage hole, pneumatic indicator, pressure regulation button and guide line guide line on described electricity-gas proportional pressure valve.
The described corrosion-resistant proportional pressure control valve that is used for high-pressure low-flow equipment, it is characterized in that: the valve body of described relief valve is made of valve body under the tubular and the barrel-shaped upper valve body with upper base, the periphery that upper and lower valve body connects end face is laid with a plurality of lugs with through hole, described flexible membrane is located at upper and lower valve body and is connected between the end face, and seals fastening described upper and lower valve body and flexible membrane with screw by described lug.
The described corrosion-resistant proportional pressure control valve that is used for high-pressure low-flow equipment is characterized in that: the valve plug of being located on the spool over against overflow inlet of described relief valve is a cone-shaped valve plug.
The described corrosion-resistant proportional pressure control valve that is used for high-pressure low-flow equipment, it is characterized in that: the valve plug of being located on the spool over against overflow inlet of described relief valve is plate shaped end face valve plug, the overflow inlet of described valve seat then is designed to the projecting inward cone of valve body, and described plate shaped end face valve plug compresses the convex cone top of overflow inlet with its end face and seals.
The described corrosion-resistant proportional pressure control valve that is used for high-pressure low-flow equipment is characterized in that: adopt PEEK or the sealing of PTFE seal ring between the valve body of described relief valve and the spool.
The described corrosion-resistant proportional pressure control valve that is used for high-pressure low-flow equipment is characterized in that: the valve body of described relief valve, spool, valve plug and valve seat all adopt corrosion resistant stainless steel to make.
The described corrosion-resistant proportional pressure control valve that is used for high-pressure low-flow equipment is characterized in that: described stainless steel is a chromium content less than chromium stainless steel or nickel chromium triangle this body stainless steel difficult to understand of 3%.
Advantage of the present utility model is:
1, the utility model has adopted new control mode, promote diaphragm as driver element with pressurized air, by changing compressed-air actuated pressure, adjust driving force, and then drive the effect that spool reaches the ratio adjusting, both solved the governing speed problem, motive sealing between sliding valve core and the valve body is resolved, and this is that both sides pressure reduction is very little because spool is in low-pressure cavity, therefore greatly at the bottom of the part seal request, only need to consider that a chemical stability gets final product.
2, the air-pressure controlling unit directly adopts the ratio Electromagnetic Drive, and control gets up not only to make things convenient for mature and reliable again like this.Different voltage or current signals act on proportion electro-magnet, export different air pilot pressures, and this pressure acts on the diaphragm, and withstands on the spring, and then produce a relatively tightly power on spool.When the pressure medium of import can not overcome spring force, valve kept cutting out.When reaching setting pressure, poppet valve core is pushed away the valve seat MEDIA FLOW to outlet.Different springs gives tight power correspondence and different medium cracking pressures, and the tight power of giving of spring is set by proportion electro-magnet control diaphragm pressure.This that is to say by providing different voltage or current controling signal, just can control the cracking pressure of cone valve, reaches the effect of proportional control pressure.
3, restriction adopts cone valve structure control, reduces the humid volume of valve to greatest extent.
For structure characteristic of the present utility model and effect thereof are had further understanding, enumerate specific embodiment now and be described with reference to the accompanying drawings as follows.
Description of drawings
Fig. 1 is the structural representation of existing relief valve.
Fig. 2 is the utility model embodiment one a structural representation.
Fig. 3 is the utility model embodiment two a structural representation.
Embodiment
Shown in Figure 2 is a kind of structural representation that is used for the corrosion-resistant proportional pressure control valve of high-pressure low-flow equipment provided by the utility model, has figure as seen, and proportional pressure control valve provided by the utility model comprises relief valve 10 and regulating controller 20.
Described relief valve 10 comprises: have the valve body 101 of overflow outlet 109, the valve seat with overflow inlet 106 102, the sealed sliding that are fixedly arranged on valve body 101 lower ends is located at the spool 104 in the valve body 101, the center, lower end of spool 104 is provided with the valve plug 103 over against overflow inlet 106, in the upper end of spool 104, be provided with and apply pressure to the pressure adjusting spring 105 of spool; Above structure is identical in prior art.The pressure that puts on the pressure adjusting spring on the spool 104 by control is the oil pressure relief of can regulate relief valve.During use, with the overflow inlet 106 of relief valve 10 and the pipeline connection of the pressure regulation of wanting, the pressure in pipeline is greater than the pressure of pressure adjusting spring, and then valve plug 103 is backed down, and the fluid in the pipeline is by the relief valve pressure release, and maintenance is stable.
Described regulating controller 20 is electricity-gas proportional pressure valves, and the model of the electricity-gas proportional pressure valve that is adopted in the diagram specific embodiment is ITV1050.This electricity-gas proportional pressure valve be provided with inlet hole 201, delivery outlet 203, air leakage hole 202, pneumatic indicator 207, pressure regulation button (comprising: boost strong 204, strong 205, step-down strong 206 is set) and guide line.Pressure on the described pressure adjusting spring 105 that puts in the relief valve 10 is provided via electricity-gas proportional pressure valve by the peripheral hardware high-pressure air source.Concrete structure is:
Be provided with the flexible membrane 111 of roof pressure pressure adjusting spring 105 in the top of the valve body 101 internal pressure-regulating springs 105 of described relief valve, described flexible membrane 111 forms an air chamber 112 with the top of described valve body 101, described air chamber 112 is provided with inlet hole 107, described inlet hole 107 is communicated with the delivery outlet 203 of described electricity-gas proportional pressure valve, and the suction port 201 of described electricity-gas proportional pressure valve connects high-pressure air source.
The control gear of equipment is according to the pressure that sets, to electricity-different voltage or current signals of gas proportional pressure valve output, electricity-different air the pilot pressure of gas proportional pressure valve output, this air pressure acts on the flexible membrane 111 of relief valve 10, and force on the pressure adjusting spring 105, and then on spool 104, produce a relatively tightly power by flexible membrane 111.When pipeline medium pressure can not overcome the pressure of pressure adjusting spring 105, valve kept cutting out.When reaching setting pressure, spool is pushed away valve seat, and MEDIA FLOW reaches the effect of proportional control pressure to outlet.
The valve body 101 of described relief valve 10 is made of valve body under the tubular 1011 and the barrel-shaped upper valve body 1012 with upper base, the periphery that upper and lower valve body connects end face is laid with a plurality of lugs 1013,1014 with through hole, described flexible membrane 111 is located at upper and lower valve body and is connected between the end face, and seal fastening described upper and lower valve body and flexible membrane by described lug with screw, to form the air chamber 112 with the mutual seal isolation of following valve body.
In specific embodiment shown in Figure 1, the valve plug of being located on the spool 104 103 over against overflow inlet of described relief valve 10 is cone-shaped valve plugs.
Fig. 3 is another embodiment of the present utility model, in Fig. 3 structure, the valve plug of being located on the spool over against overflow inlet of described relief valve is plate shaped end face valve plug 103 ', the overflow inlet 106 ' of described valve seat then is designed to the projecting inward cone of valve body, and described plate shaped end face valve plug compresses the convex cone top of overflow inlet with its end face and seals.
Adopt PEEK or the sealing of PTFE seal ring between the valve body 101 of described relief valve and the spool 104.
For being adapted to the operating conditions of aggressive medium, the valve body of described relief valve, spool, valve plug and valve seat are all made with corrosion resistant stainless steel.Described stainless steel is a chromium content less than chromium stainless steel or nickel chromium triangle this body stainless steel difficult to understand of 3%.
Claims (8)
1, a kind of corrosion-resistant proportional pressure control valve that is used for high-pressure low-flow equipment, comprise relief valve and regulating controller, described relief valve comprises: have the valve body of overflow outlet, the valve seat with overflow inlet, the sealed sliding that is fixedly arranged on valve body lower end is located at being provided with over against the spool of the valve plug of overflow inlet in the valve body, apply pressure to pressure adjusting spring on the spool; It is characterized in that: described regulating controller is electricity-gas proportional pressure valve, be provided with the flexible membrane of roof pressure pressure adjusting spring in the top of described relief valve valve body internal pressure-regulating spring, one air chamber is formed at the top of described flexible membrane and described valve body, described air chamber is provided with inlet hole, inlet hole on the described air chamber connects the delivery outlet of described electricity-gas proportional pressure valve, and the suction port of described electricity-gas proportional pressure valve connects high-pressure air source.
2, the corrosion-resistant proportional pressure control valve that is used for high-pressure low-flow equipment according to claim 1 is characterized in that: also be provided with air leakage hole and guide line on described electricity-gas proportional pressure valve; Or also be provided with air leakage hole, pneumatic indicator, pressure regulation button and guide line guide line on described electricity-gas proportional pressure valve.
3, the corrosion-resistant proportional pressure control valve that is used for high-pressure low-flow equipment according to claim 1, it is characterized in that: the valve body of described relief valve is made of valve body under the tubular and the barrel-shaped upper valve body with upper base, the periphery that upper and lower valve body connects end face is laid with a plurality of lugs with through hole, described flexible membrane is located at upper and lower valve body and is connected between the end face, and seals fastening described upper and lower valve body and flexible membrane with screw by described lug.
4, the corrosion-resistant proportional pressure control valve that is used for high-pressure low-flow equipment according to claim 1 is characterized in that: the valve plug of being located on the spool over against overflow inlet of described relief valve is a cone-shaped valve plug.
5, the corrosion-resistant proportional pressure control valve that is used for high-pressure low-flow equipment according to claim 1, it is characterized in that: the valve plug of being located on the spool over against overflow inlet of described relief valve is plate shaped end face valve plug, the overflow inlet of described valve seat then is designed to the projecting inward cone of valve body, and described plate shaped end face valve plug compresses the convex cone top of overflow inlet with its end face and seals.
6, the corrosion-resistant proportional pressure control valve that is used for high-pressure low-flow equipment according to claim 1 is characterized in that: adopt PEEK or the sealing of PTFE seal ring between the valve body of described relief valve and the spool.
7, the corrosion-resistant proportional pressure control valve that is used for high-pressure low-flow equipment according to claim 1, it is characterized in that: the valve body of described relief valve, spool, valve plug and valve seat all adopt corrosion resistant stainless steel to make.
8, the corrosion-resistant proportional pressure control valve that is used for high-pressure low-flow equipment according to claim 7 is characterized in that: described stainless steel is a chromium content less than chromium stainless steel or nickel chromium triangle this body stainless steel difficult to understand of 3%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201900332U CN201103730Y (en) | 2007-11-07 | 2007-11-07 | Corrosion resistant scale overflow valve used for high-pressure small-flow equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201900332U CN201103730Y (en) | 2007-11-07 | 2007-11-07 | Corrosion resistant scale overflow valve used for high-pressure small-flow equipment |
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| Publication Number | Publication Date |
|---|---|
| CN201103730Y true CN201103730Y (en) | 2008-08-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201900332U Expired - Fee Related CN201103730Y (en) | 2007-11-07 | 2007-11-07 | Corrosion resistant scale overflow valve used for high-pressure small-flow equipment |
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| Country | Link |
|---|---|
| CN (1) | CN201103730Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103644339A (en) * | 2013-11-25 | 2014-03-19 | 大连元利流体技术有限公司 | Pollution resistant pilot operated relief valve |
| CN106594346A (en) * | 2016-12-22 | 2017-04-26 | 苏州劲元油压机械有限公司 | Acid and base resistant high-pressure overflow valve body |
| CN110748516A (en) * | 2019-10-28 | 2020-02-04 | 韩国昊 | Walking control device for engineering vehicle |
-
2007
- 2007-11-07 CN CNU2007201900332U patent/CN201103730Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103644339A (en) * | 2013-11-25 | 2014-03-19 | 大连元利流体技术有限公司 | Pollution resistant pilot operated relief valve |
| CN106594346A (en) * | 2016-12-22 | 2017-04-26 | 苏州劲元油压机械有限公司 | Acid and base resistant high-pressure overflow valve body |
| CN110748516A (en) * | 2019-10-28 | 2020-02-04 | 韩国昊 | Walking control device for engineering vehicle |
| CN110748516B (en) * | 2019-10-28 | 2021-05-14 | 徐州九阳机械制造有限公司 | Walking control device for engineering vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080820 Termination date: 20161107 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |