CN204985761U - Gas -solid two -phase flow valve - Google Patents
Gas -solid two -phase flow valve Download PDFInfo
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- CN204985761U CN204985761U CN201520397176.5U CN201520397176U CN204985761U CN 204985761 U CN204985761 U CN 204985761U CN 201520397176 U CN201520397176 U CN 201520397176U CN 204985761 U CN204985761 U CN 204985761U
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Abstract
The utility model discloses a gas -solid two -phase flow valve, include: valve body, valve rod, valve ball, pressure spring, plug screw and valve block, valve body and the mutual spiral shell of plug screw close the formation valve pocket, are provided with the venthole that the valve opening reached and the valve opening is ventilated on the valve body, are provided with the inlet port of valve pocket UNICOM on the plug screw, and the nose end setting of valve opening has the valve block of centre bore in the valve pocket, and the valve ball nationality is pushed up by pressure and supports the valve block centre bore and seal up the valve opening, and the valve rod is followed the opposite side and is pushed up to the valve ball, the valve block on be equipped with curvature radius and be greater than the radial first concave spherical surface of valve ball, its characterized in that, the pressure spring with be provided with the ejection piece with pressure spring fixed connection between the valve ball, it is greater than the radial second concave spherical surface of valve ball to be provided with curvature radius on the ejection piece, the valve stem end face is a curvature radius and is greater than the radial third concave spherical surface of valve ball. The gas -solid two -phase flow valve of this scheme of adoption is littleer with the area of contact of valve ball by each parts, the wearing and tearing of having avoided the solid particle centre gripping to lead to the fact, and wearability and leakproofness obtain the improvement simultaneously.
Description
Technical field
The utility model relates to a kind of valve, particularly a kind of gas-solid two-phase flow valve.
Background technique
Trigger valve on anti-riot sprayer is the vitals that control sprayer carries out launching and stopping, and its quality directly affects the safety and reliability of anti-riot sprayer, therefore, requires that anti-riot sprayer trigger valve is wear-resistant, tightness good, the life-span is long.Common air valve is mainly made up of valve body, valve rod, valve ball, stage clip, plug screw and valve block.Wherein, valve body and plug screw screw togather formation valve pocket mutually, air outlet hole valve body being provided with valve opening and communicating with valve opening, plug screw is provided with the inlet hole be communicated with valve pocket, be provided with at the nose end of valve pocket internal valve opening and there is the concave spherical surface identical with valve ball radius and the valve block of center hole, valve opening seals by the concave spherical surface of the pressure contact valve block of stage clip and center hole by valve ball, above-mentioned valve block, valve ball, stage clip forms spool jointly, valve rod surveys contact valve ball from another, when external force is greater than pressure to valve ball of stage clip and gas, valve ball will leave valve opening, inlet hole will communicate with air outlet hole, air-flow will be discharged by air outlet hole by valve.Be gas powder stream due to what flow through anti-riot sprayer trigger valve, be the fluid-mixing of gas and solid, solid particle easily causes and is leaked by clamping, and swiftly flowing powder makes the valve block of standard valve and valve ball be worn very soon.How therefore a kind of anti-leak be provided, the gas-solid two-phase flow valve of the anti abrasive trigger valve be used as on anti-riot sprayer is the difficult problem that those skilled in the art attack for a long time without any result.
Patent CN200520018940 gas-solid two-phase flow valve provides a kind of mode, by being provided with the concave spherical surface that radius of curvature is greater than valve ball radius on described valve block, reduce the sealing area of contact valve ball and valve block, avoid solid particle to be clamped the wearing and tearing and leakage that cause by sealing surface.Although do certain effect like this, unsatisfactory.This is the surface of contact due to valve ball and stage clip, and the surface of contact area of valve ball and valve rod is still very large, easily clamps solid particle, causes the wearing and tearing of valve ball.Because valve ball is not fixedly connected with in valve body, can rotate, therefore when these wear surfaces forward the position corresponding with valve block sealing surface to, poorly sealed causing will be caused to leak.This is just badly in need of being further improved prior art.
Summary of the invention
Technical problem to be solved in the utility model is, for the above-mentioned deficiency of prior art, provides one to have better anti-wear, a kind of gas-solid two-phase flow valve of anti-leak.
For solving the problems of the technologies described above, the present invention adopts the basic conception of technological scheme to be:
A kind of gas-solid two-phase flow valve, comprise: valve body, valve rod, valve ball, stage clip, plug screw and valve block, described valve body and plug screw screw togather formation valve pocket mutually, air outlet hole valve body being provided with valve opening and ventilating with valve opening, plug screw is provided with the inlet hole of valve pocket UNICOM, at the nose end of valve pocket internal valve opening, the valve block with center hole is set, valve opening is sealed by pressure contact valve block center hole by valve ball nationality, valve rod is from opposite side contact valve ball, described valve block is provided with the first concave spherical surface that radius of curvature is greater than valve ball radius, it is characterized in that, the ejecting sheet be fixedly connected with stage clip is provided with between described stage clip with described valve ball, described ejecting sheet is provided with the second concave spherical surface that radius of curvature is greater than valve ball radius, described valve rod end face is the 3rd concave spherical surface that a radius of curvature is greater than valve ball radius.
Bonding between described ejecting sheet with described stage clip.
Radius of curvature=(1.02 ~ 1.5) valve ball radius of the first described concave spherical surface, the best is (1.1 ~ 1.2) valve ball radius.
Radius of curvature=(1.02 ~ 1.5) valve ball radius of the second described concave spherical surface, the best is (1.1 ~ 1.2) valve ball radius.
Radius of curvature=(1.02 ~ 1.5) valve ball radius of the 3rd described concave spherical surface, the best is (1.1 ~ 1.2) valve ball radius.
Described valve ball material is ceramic valve, preferred nitrogen SiClx (Si3N4) pottery.
Described valve block material is pottery, preferred nitrogen SiClx (Si3N4) pottery.
Described ejecting sheet material is stainless steel.
Described valve stem end material is stainless steel.
After adopting technique scheme, the utility model has following beneficial effect.
1, on ejecting sheet, the radius of curvature of concave spherical surface is greater than valve ball radius, and surface of contact between valve ball and ejecting sheet is reduced, becomes non-same arc line contact sealing and pay, make the width of surface of contact be less than particle diameter, minimizing powder is stuck in the possibility on stage clip and valve ball surface of contact.
The radius of curvature of the concave spherical surface 2, on valve rod end face is greater than valve ball radius, and surface of contact between valve ball and valve rod is reduced, and minimizing powder is stuck in the possibility on stage clip and valve ball surface of contact.
3, adopt silicon nitride ceramics valve ball, its hardness is HRA92, and abrasion resistance is higher than cemented carbide 4 ~ 8 times; Silicon nitride ceramics has self lubricity, reduces powder and adheres to.
For having further understanding to structure characteristic of the present utility model and effect thereof, hereby enumerating specific embodiment and being described with reference to the accompanying drawings as follows.
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 is the valve mechanism figure of prior art.
Fig. 2 is the valve core structure figure of prior art.
Fig. 3 is gas-solid two-phase flow valve valve core structure figure of the present utility model.
Valve body 1, valve rod 2, air outlet hole 3, valve ball 4, stage clip 5, plug screw 6, inlet hole 7, valve block 8, valve pocket 9, ejecting sheet 10, first concave spherical surface 11, second concave spherical surface 12, the 3rd concave spherical surface 13
Embodiment
As the schematic diagram that Fig. 1 is prior art valve, this gas is mainly made up of valve body 1, valve rod 2, valve ball 4, stage clip 5, plug screw 6 and valve block 8.Wherein, valve body 1 and plug screw 6 mutually screw togather and form valve pocket 9, the air outlet hole 3 valve body 1 being provided with valve opening and communicating with valve opening, plug screw 6 is provided with the inlet hole 7 be communicated with valve pocket 9, the valve block 8 with the concave spherical surface identical with valve ball radius and center hole is provided with at the nose end of valve pocket 9 internal valve opening, valve opening seals by the concave spherical surface of the pressure contact valve block 8 of stage clip 5 and center hole by valve ball 4, above-mentioned valve block 8, valve ball 4, stage clip 5 forms spool jointly, valve rod 2 surveys contact valve ball 4 from another, when external force is greater than pressure to valve ball 4 of stage clip and gas, valve ball 4 will leave valve opening, inlet hole 7 will communicate with air outlet hole, air-flow will be discharged by air outlet hole 3 by valve.Gas powder stream due to what flow through anti-riot sprayer trigger valve, it is the fluid-mixing of gas and solid, therefore often on the surface of contact of valve ball and valve block, clamp solid particle when valve seal, the wearing and tearing of valve ball 4 and valve block 8 can be caused thus, cause sealability to be deteriorated.The radius of curvature that surface of contact is set on valve block 8 is had to be greater than the scheme of the first concave spherical surface 12 of the radius of valve ball 4 in prior art, although this set decreases the probability of surface of contact clamping solid particle to a certain extent, decrease the wearing and tearing of valve ball 4 to a certain extent, but its effect is unsatisfactory.After one section uses, the sealing of valve still declines to some extent.
The utility model, for the problems referred to above, is optimized setting to valve.
As shown in Figure 3, a kind of gas-solid two-phase flow valve of the utility model, comprise: valve body 1, valve rod 2, valve ball 4, stage clip 5, plug screw 6 and valve block 8, described valve body 1 mutually screws togather with plug screw 6 and forms valve pocket 9, the air outlet hole 3 valve body 1 being provided with valve opening and ventilating with valve opening, plug screw is provided with the inlet hole 7 of valve pocket 9 UNICOM, at the nose end of valve pocket 9 internal valve opening, the valve block 8 with center hole is set, valve opening is sealed by pressure contact valve block center hole by valve ball 4 nationality, valve rod is from opposite side contact valve ball, described valve block is provided with the first concave spherical surface 11 that radius of curvature is greater than valve ball radius, it is characterized in that, described stage clip 5 be provided with the ejecting sheet 10 be fixedly connected with stage clip 5 between described valve ball, described ejection 10 is provided with the second concave spherical surface 12 that radius of curvature is greater than valve ball radius, described valve rod 2 end face is the 3rd concave spherical surface 13 that a radius of curvature is greater than valve ball radius.
The utility model to except arranging the first concave spherical surface 11 on valve block 8, also the surface of contact between stage clip 5 and valve ball is optimized, add an ejecting sheet 10, and on ejecting sheet 10, be provided with the second concave spherical surface 12 that radius of curvature is greater than valve ball 4, further reduce the area of contact between stage clip 5 and valve ball 4, reduce the possibility being caused wearing and tearing by clamping solid particle.
Further, by the material selection stainless steel of ejecting sheet 10, its object is to the material selecting hardness lower than pottery, protection ball surface is not worn and torn.Because ejecting sheet itself does not participate in sealing, also can not impact the sealing of valve, select hardness lower than the material of valve ball even if therefore there are wearing and tearing, when there being solid clamping to cause wearing and tearing, ejecting sheet is preferentially worn, and protects ball surface.
The utility model is optimized the surface of contact between valve rod 2 end and valve ball 4 simultaneously, valve rod 2 end is set to the 3rd concave spherical surface 13 that a radius of curvature is greater than valve ball radius of curvature, its advantage is, the 3rd concave spherical surface 13 that described valve rod 2 is greater than valve ball radius with radius of curvature replaces prior art mean curvature radius to equal the end face of valve ball radius.Design like this makes surface of contact between valve rod 2 and valve ball 4 reduce, become non-same arc line contact sealing to pay, the width of surface of contact is made to be less than particle diameter, further reduce the area of contact between stage clip and valve ball, reduce the possibility being caused wearing and tearing by clamping solid particle, reach the object of the sealing improving valve.
Further, by the material selection stainless steel of valve rod 2, its object is to the material selecting hardness lower than pottery, does not wear and tear in protection valve ball 4 surface.Because valve rod 2 itself does not participate in sealing, also can not impact the sealing of valve, select hardness lower than the material of valve ball even if therefore there are wearing and tearing, when there being solid clamping to cause wearing and tearing, ejecting sheet is preferentially worn, and protects ball surface.
Specifically, radius of curvature=(1.02 ~ 1.5) valve ball radius of the first described concave spherical surface, the best is (1.1 ~ 1.2) valve ball radius.
Same, radius of curvature=(1.02 ~ 1.5) valve ball radius of the second described concave spherical surface, the best is (1.1 ~ 1.2) valve ball radius.
Same, radius of curvature=(1.02 ~ 1.5) valve ball radius of the 3rd described concave spherical surface, the best is (1.1 ~ 1.2) valve ball radius.
The radius of curvature of three concave spherical surfaces choose can not too small can not be excessive, because if select radius of curvature too small, obviously cannot reduce area of contact, the effect reduced wear is also just not obvious.Meanwhile, can not select excessive, because if select excessive radius of curvature that area of contact then can be caused too small, cause valve stability when opening and closing to decline.When being 1.1 ~ 1.2 times of valve ball 4 radius by the radius of curvature of experiment test concave spherical surface, stability and wear-resisting property best, therefore preferred curvature radius=(1.02 ~ 1.5) valve ball radius, the best is (1.1 ~ 1.2) valve ball radius.
For improving the wear resistance of spool, described valve block 8 and valve ball 4 all adopt stupalith to suppress, and form through grinding and lappingout,
Specifically adopt silicon nitride ceramics valve block 8 and silicon nitride ceramics valve ball 4, the hardness of silicon nitride ceramics is HRA92, and abrasion resistance is higher than cemented carbide 4 ~ 8 times; Silicon nitride ceramics also has self lubricity, can reduce powder and adhere to.
Gas-solid two-phase flow valve of the present utility model, except arranging except the first concave spherical surface on the surface of contact of valve ball and valve block, also arranges the ejecting sheet with the second concave spherical surface, also arranges the 3rd concave spherical surface at valve stem end between stage clip and valve ball.While solving the sealing problem of high speed gas powder stream, reduce further the degree of wear of valve ball, extend life of valve, the improvement late gate life-span reaches 900 times.
Embodiment in above-described embodiment can combine further or replace; and embodiment is described the preferred embodiments of the present invention; not the spirit and scope of the present invention are limited; under the prerequisite not departing from design philosophy of the present invention; the various changes and modifications that in related domain, professional and technical personnel makes technological scheme of the present invention, all belong to protection scope of the present invention.
Claims (14)
1. a gas-solid two-phase flow valve, comprise: valve body, valve rod, valve ball, stage clip, plug screw and valve block, described valve body and plug screw screw togather formation valve pocket mutually, air outlet hole valve body being provided with valve opening and ventilating with valve opening, plug screw is provided with the inlet hole of valve pocket UNICOM, at the nose end of valve pocket internal valve opening, the valve block with center hole is set, valve opening is sealed by pressure contact valve block center hole by valve ball nationality, valve rod is from opposite side contact valve ball, described valve block is provided with the first concave spherical surface that radius of curvature is greater than valve ball radius, it is characterized in that, the ejecting sheet be fixedly connected with stage clip is provided with between described stage clip with described valve ball, described ejecting sheet is provided with the second concave spherical surface that radius of curvature is greater than valve ball radius, described valve rod end face is the 3rd concave spherical surface that a radius of curvature is greater than valve ball radius.
2. a kind of gas-solid two-phase flow valve according to claim 1, is characterized in that, bonding between described ejecting sheet with described stage clip.
3. a kind of gas-solid two-phase flow valve according to claim 1, is characterized in that, radius of curvature=(1.02 ~ 1.5) valve ball radius of the first described concave spherical surface.
4. a kind of gas-solid two-phase flow valve according to claim 3, is characterized in that, radius of curvature=(1.1 ~ 1.2) valve ball radius of the first described concave spherical surface.
5. a kind of gas-solid two-phase flow valve according to claim 1, is characterized in that, radius of curvature=(1.02 ~ 1.5) valve ball radius of the second described concave spherical surface.
6. a kind of gas-solid two-phase flow valve according to claim 5, is characterized in that, radius of curvature=(1.1 ~ 1.2) valve ball radius of the second described concave spherical surface.
7. a kind of gas-solid two-phase flow valve according to claim 1, is characterized in that, radius of curvature=(1.02 ~ 1.5) valve ball radius of the 3rd described concave spherical surface.
8. a kind of gas-solid two-phase flow valve according to claim 7, is characterized in that, radius of curvature=(1.1 ~ 1.2) valve ball radius of the 3rd described concave spherical surface.
9. a kind of gas-solid two-phase flow valve according to claim 1, it is characterized in that, described valve ball material is ceramic valve.
10. a kind of gas-solid two-phase flow valve according to claim 9, it is characterized in that, described valve ball material is silicon nitride ceramics.
11. a kind of gas-solid two-phase flow valves according to claim 1, is characterized in that, described valve block material is pottery.
12., according to gas-solid two-phase flow valve a kind of described in claim 11, is characterized in that, described valve block material is silicon nitride ceramics.
13. a kind of gas-solid two-phase flow valves according to claim 1, it is characterized in that, described ejecting sheet material is stainless steel.
14. a kind of gas-solid two-phase flow valves according to claim 1, it is characterized in that, described valve stem end material is stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520397176.5U CN204985761U (en) | 2015-06-10 | 2015-06-10 | Gas -solid two -phase flow valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520397176.5U CN204985761U (en) | 2015-06-10 | 2015-06-10 | Gas -solid two -phase flow valve |
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| CN204985761U true CN204985761U (en) | 2016-01-20 |
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| CN201520397176.5U Active CN204985761U (en) | 2015-06-10 | 2015-06-10 | Gas -solid two -phase flow valve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108692040A (en) * | 2018-06-04 | 2018-10-23 | 浙江欧伦泰防火设备有限公司 | A kind of high security aluminum valve |
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2015
- 2015-06-10 CN CN201520397176.5U patent/CN204985761U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108692040A (en) * | 2018-06-04 | 2018-10-23 | 浙江欧伦泰防火设备有限公司 | A kind of high security aluminum valve |
| CN108692040B (en) * | 2018-06-04 | 2019-10-01 | 浙江欧伦泰防火设备有限公司 | A kind of high security aluminum valve |
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