CN204025802U - Anti-rotten lining type inhalation valve - Google Patents
Anti-rotten lining type inhalation valve Download PDFInfo
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- CN204025802U CN204025802U CN201420487168.5U CN201420487168U CN204025802U CN 204025802 U CN204025802 U CN 204025802U CN 201420487168 U CN201420487168 U CN 201420487168U CN 204025802 U CN204025802 U CN 204025802U
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Abstract
The utility model discloses a kind of anti-rotten lining type inhalation valve, be intended to solve in existing inhalation valve using process and be easily corroded, reduce the working life of inhalation valve, and inhalation valve is all-in-one-piece structure, exhalation valve and inhaling valve are arranged on same valve body, dismounting inconvenience, the deficiency that maintenance cost is high.This model utility comprises malleation valve body and negative pressure valve body, malleation valve pocket and negative pressure valve cavity wall are all lined with corrosion protective lining, malleation valve body is provided with the first opening, the second opening, malleation flap mount inlet, negative pressure valve body is provided with the 3rd opening, negative pressure flap mount inlet, the second opening is connected by flange removable seal with the 3rd opening, on malleation flap mount inlet, be connected with malleation flap assembly, on negative pressure flap mount inlet, be connected with negative pressure flap assembly, malleation flap assembly and negative pressure flap assembly all vertically arrange, malleation flap assembly is arranged on malleation valve pocket outside, negative pressure flap assembly is arranged on negative pressure valve pocket inside.
Description
Technical field
The utility model relates to a kind of valve, and more particularly, it relates to a kind of anti-rotten lining type inhalation valve of long service life.
Background technique
At oil, chemical field, need to often use inhalation valve and carry out compensator internal pressure, make pot liquid turnover convenient.Its working principle is to utilize the deadweight of inhalation valve itself or act on the camber of spring power of flap and thrust that tank inside and outside differential pressure produces balances each other and works.Inhalation valve, in actual using process, often can run into and be with corrosive medium, and these media can corrode inhalation valve, reduces the working life of inhalation valve.And a lot of inhalation valves that use are at present all-in-one-piece structure mostly, exhalation valve and inhaling valve are arranged on same valve body, dismounting inconvenience, and maintenance cost is high.
Chinese patent notification number CN203348658U, a kind of novel tank fire-retardant breather valve is disclosed, it is by inhalation valve housing, back-fire relief dish, respiratory box, exhalation valve disc, sucking valve disc and rain cover forms, back-fire relief dish is housed in inhalation valve housing, respiratory box is equipped with in back-fire relief dish top, on respiratory box, exhalation valve disc is installed and is sucked valve disc by spring position-limited lever, one end of respiratory box extends to inhalation valve housing outer end, respiratory box termination outside inhalation valve housing is open state, the movable rain cover of installing on the respiratory box of inhalation valve housing outer end, in the respiratory box termination of open state, insert active carbon case is installed, in active carbon case, active carbon is housed, active carbon adopts waffle slab to make, on the casing of active carbon case one end, be provided with bracelet, on the installation opening of inhalation valve housing lower end, be provided with adpting flange.The inhalation valve of this structure, in actual using process, is easily corroded, and has reduced the working life of inhalation valve.And inhalation valve is all-in-one-piece structure, exhalation valve and inhaling valve are arranged on same valve body, dismounting inconvenience, and maintenance cost is high.
Model utility content
The utility model has overcome in existing inhalation valve using process and has easily been corroded, reduce the working life of inhalation valve, and inhalation valve is all-in-one-piece structure, exhalation valve and inhaling valve are arranged on same valve body, dismounting inconvenience, the deficiency that maintenance cost is high, a kind of anti-rotten lining type inhalation valve is provided, it is in use difficult for being corroded, the long service life of inhalation valve, and inhalation valve is split type structure, and malleation flap and negative pressure flap are separately positioned on two different valve bodies, easy accessibility, maintenance cost is low.
In order to solve the problems of the technologies described above, the utility model is by the following technical solutions: a kind of anti-rotten lining type inhalation valve, comprise malleation valve body and negative pressure valve body, malleation valve pocket and negative pressure valve pocket are set respectively in malleation valve body and negative pressure valve body, malleation valve pocket and negative pressure valve pocket are communicated with, malleation valve pocket and negative pressure valve cavity wall are all lined with corrosion protective lining, malleation valve body is provided with the first opening, the second opening, malleation flap mount inlet, negative pressure valve body is provided with the 3rd opening, negative pressure flap mount inlet, the second opening is connected by flange removable seal with the 3rd opening, on malleation flap mount inlet, be connected with malleation flap assembly, on negative pressure flap mount inlet, be connected with negative pressure flap assembly, malleation flap assembly and negative pressure flap assembly all vertically arrange, malleation flap assembly is arranged on malleation valve pocket outside, negative pressure flap assembly is arranged on negative pressure valve pocket inside.
Inhalation valve is linked together by malleation valve body and negative pressure valve body removable seal, is split-type structural, and malleation flap and negative pressure flap are separately positioned on two different valve bodies, keep in repair easy accessibility in the time breaking down, and maintenance cost is low.Owing to being all lined with corrosion protective lining at malleation valve pocket and negative pressure valve cavity wall, when inhalation valve uses in aggressive medium environment, be difficult for being corroded, the long service life of inhalation valve.When use, the first opening and tank body are tightly connected, in the time that tank internal pressure is greater than atmospheric pressure, and negative pressure flap assembly closure, malleation flap assembly is opened, and medium is discharged release from malleation flap mount inlet; In the time that tank internal pressure is less than atmospheric pressure, malleation flap assembly closure, negative pressure flap assembly is opened, and air flows into supercharging in tank body from negative pressure flap mount inlet.
As preferably, malleation flap assembly comprises malleation flap, malleation valve rod, positive guide sleeve, malleation valve rod and positive guide sleeve vertically arrange, malleation valve rod lower end is vertically connected on malleation flap, malleation flap lower surface is lined with anticorrosive coat, on malleation valve body, be laid with several directional posts near malleation flap mount inlet one circle, directional post upper end is all fixedly connected on protection apron, between adjacent two directional posts, be all connected with filter screen, positive guide sleeve is arranged on protection apron neutral position, positive guide sleeve lower end is provided with the pilot hole of vertical setting, malleation valve rod is actively socketed in pilot hole.Malleation valve rod slides up and down the opening and closing that realize flap in pilot hole, and malleation flap assembly, by the effect of gravity, is realized moving up and down of flap.The atmospheric pressure being subject to when malleation flap adds when the gravity sum of malleation flap and malleation valve rod is greater than medium in tank to the pressure of positive valve lobe, malleation flap closure; Otherwise malleation flap is opened, malleation valve rod moves up in pilot hole.Directional post has facilitated the installation of protection apron and positive guide sleeve, and filter screen prevents that the impurity in environment from entering in valve body.At malleation flap outer surface, anticorrosive coat is set, increases the anti-corrosion property energy of malleation flap, extend the working life of malleation flap.
As preferably, positive guide sleeve upper end is connected with connecting base, connecting base is socketed with bonnet outward, in connecting base, be connected with Adjusting bolt Adjusting screw, malleation valve rod is socketed in Adjusting bolt Adjusting screw, malleation valve rod upper connecting base below is socketed with return spring, and the two ends of malleation valve rod position last time spring are connected with respectively upper spring seat and lower spring cup, and the lower end of Adjusting bolt Adjusting screw is connected on upper spring seat.The atmospheric pressure being subject to when malleation flap adds that the elastic force of return spring adds the gravity sum of malleation flap and malleation valve rod while being greater than medium in tank to the pressure of positive valve lobe, malleation flap closure; Otherwise malleation flap is opened, malleation valve rod moves up in pilot hole.This mode can make the higher force value of maintenance in tank, and can regulate the elastic force effect of return spring to positive valve lobe by rotation Adjusting bolt Adjusting screw, thereby changes the cracking pressure of malleation flap, easy to adjust, uses flexibly.
As preferably, on protection apron, be connected with the protective housing arranging down, protective housing lower ending opening.This structural design is directly discharged in atmosphere the medium that in tank, release is discharged, easy to operate.
Another kind of scheme, on malleation valve body, the outside of directional post is sealedly connected with collecting box, collecting box inwall is lined with anticorrosive coat, collecting box left side is provided with collects mouth, collecting box upper end is provided with malleation valve gap connection mouth, collecting box lower end is provided with the through hole being communicated with malleation flap mount inlet, and on malleation valve gap connection mouth, removable seal is connected with malleation valve gap, and malleation flap assembly is connected between malleation valve gap and malleation flap mount inlet.The medium that this structure setting is discharged release collects by collecting box, convenient recovery and utilization again.
As preferably, negative pressure flap assembly comprises negative pressure flap, negative pressure valve rod, negative pressure valve gap, on negative pressure flap outer surface, be lined with anticorrosive coat, negative pressure valve rod is vertically connected on negative pressure flap, negative pressure valve gap is tubular structure and upper end closed lower ending opening, negative pressure valve rod movable upper end is socketed in negative pressure valve gap, and negative pressure valve gap inwall is lined with corrosion protective lining.The pressure acting on negative pressure flap when medium adds that the gravity sum of negative pressure flap and negative pressure valve rod is greater than the pressure of air to negative pressure flap, negative pressure flap closure; Otherwise negative pressure flap is opened, negative pressure valve rod in negative pressure valve gap on move.
As preferably, positive valve cavity wall is provided with a circle locating slot near malleation flap mount inlet position, and on malleation valve body, the first opening end and the second opening end position are equipped with a circle locating slot; Negative pressure valve cavity wall is provided with a circle locating slot near negative pressure flap mount inlet position, on negative pressure valve body, the 3rd opening end is provided with a circle locating slot, the width that locating slot cross section is all isosceles trapezoidal structure and locating slot opening is all less than the width of bottom surface, and corrosion protective lining serves as a contrast in locating slot.Locating slot has improved corrosion protective lining and the reliability that malleation valve pocket and negative pressure valve cavity wall are connected, and makes corrosion protective lining connect rear difficult drop-off and gets off.
As preferably, on negative pressure valve body, negative pressure flap mount inlet position is connected with annular pressing plate, between pressing plate and negative pressure valve body, is connected with filter screen.Filter screen prevents that airborne impurity from flowing in tank body.
Compared with prior art, the beneficial effects of the utility model are: (1) anti-rotten lining type inhalation valve is in use difficult for being corroded, the long service life of inhalation valve, and inhalation valve is split type structure, malleation flap and negative pressure flap are separately positioned on two different valve bodies, easy accessibility, maintenance cost is low; (2) medium that malleation flap mount inlet is discharged can be recycled, and has reduced the waste of the energy, and can prevent the hazardous medium befouling environment of discharging.
Brief description of the drawings
Fig. 1 is embodiment's 1 of the present utility model structural representation;
Fig. 2 is embodiment's 2 of the present utility model structural representation;
Fig. 3 is embodiment's 3 of the present utility model structural representation;
In figure: 1, malleation valve body, 2, negative pressure valve body, 3, malleation valve pocket, 4, negative pressure valve pocket, 5, corrosion protective lining, 6, the first opening, 7, the second opening, 8, malleation flap mount inlet, 9, the 3rd opening, 10, negative pressure flap mount inlet, 11, malleation flap assembly, 12, negative pressure flap assembly, 13, malleation flap, 14, malleation valve rod, 15, positive guide sleeve, 16, anticorrosive coat, 17, directional post, 18, protection apron, 19, filter screen, 20, connecting base, 21, bonnet, 22, Adjusting bolt Adjusting screw, 23, return spring, 24, upper spring seat, 25, lower spring cup, 26, protective housing, 27, collecting box, 28, collect mouth, 29, negative pressure flap, 30, negative pressure valve rod, 31, negative pressure valve gap, 32, locating slot, 33, pressing plate, 34, malleation valve gap.
Embodiment
Below by specific embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is further described specifically:
Embodiment 1: a kind of anti-rotten lining type inhalation valve (referring to accompanying drawing 1), comprise malleation valve body 1 and negative pressure valve body 2, and malleation valve pocket 3 and negative pressure valve pocket 4 are set respectively in malleation valve body and negative pressure valve body, malleation valve pocket and negative pressure valve pocket are communicated with.Malleation valve pocket and negative pressure valve cavity wall are all lined with corrosion protective lining 5, malleation valve body is provided with the first opening 6, the second opening 7, malleation flap mount inlet 8, negative pressure valve body is provided with the 3rd opening 9, negative pressure flap mount inlet 10, the second opening is connected by flange removable seal with the 3rd opening, the T-shaped three-way tubular structure of malleation valve body, malleation flap mount inlet is arranged on the upper end of malleation valve body, the first opening is arranged on the lower end of malleation valve body, the second opening is arranged on the right side of malleation valve body, the 3rd opening is arranged on the left side of negative pressure valve body, negative pressure flap mount inlet is arranged on the lower end of negative pressure valve body.On malleation flap mount inlet, be connected with malleation flap assembly 11, on negative pressure flap mount inlet, be connected with negative pressure flap assembly 12, malleation flap assembly and negative pressure flap assembly all vertically arrange, and malleation flap assembly is arranged on malleation valve pocket outside, and negative pressure flap assembly is arranged on negative pressure valve pocket inside.The first opening and malleation flap mount inlet are coaxial vertically to be arranged, and the second opening and the 3rd opening are coaxially horizontally disposed with.Malleation flap assembly comprises malleation flap 13, malleation valve rod 14, positive guide sleeve 15, malleation valve rod and positive guide sleeve vertically arrange, malleation valve rod lower end is vertically connected on malleation flap, malleation flap lower surface is lined with anticorrosive coat 16, and malleation flap is connected on the end face of malleation flap mount inlet position.On malleation valve body, be laid with several directional posts 17 near malleation flap mount inlet one circle, directional post upper end is all fixedly connected on protection apron 18, between adjacent two directional posts, be all connected with filter screen 19, positive guide sleeve is arranged on protection apron neutral position, positive guide sleeve lower end is provided with the pilot hole of vertical setting, and malleation valve rod is actively socketed in pilot hole.On protection apron, be connected with down the protective housing 26 arranging, the up-small and down-big and lower ending opening of protective housing.Negative pressure flap assembly comprises negative pressure flap 29, negative pressure valve rod 30, negative pressure valve gap 31, on negative pressure flap outer surface, be lined with anticorrosive coat, negative pressure valve rod is vertically connected on negative pressure flap, negative pressure valve gap is tubular structure and upper end closed lower ending opening, negative pressure valve cover gab end is communicated with negative pressure valve pocket, negative pressure valve rod movable upper end is socketed in negative pressure valve gap, and negative pressure valve gap inwall is lined with corrosion protective lining.Positive valve cavity wall is provided with a circle locating slot 32 near malleation flap mount inlet position, and on malleation valve body, the first opening end and the second opening end position are equipped with a circle locating slot; Negative pressure valve cavity wall is provided with a circle locating slot near negative pressure flap mount inlet position, on negative pressure valve body, the 3rd opening end is provided with a circle locating slot, the width that locating slot cross section is all isosceles trapezoidal structure and locating slot opening is all less than the width of bottom surface, and corrosion protective lining serves as a contrast in locating slot.On negative pressure valve body, negative pressure flap mount inlet position is connected with annular pressing plate 33, between pressing plate and negative pressure valve body, is connected with filter screen.
Inhalation valve is linked together by malleation valve body and negative pressure valve body removable seal, is split-type structural, and malleation flap and negative pressure flap are separately positioned on two different valve bodies, keep in repair easy accessibility in the time breaking down, and maintenance cost is low.Owing to being all lined with corrosion protective lining at malleation valve pocket and negative pressure valve cavity wall, when inhalation valve uses in aggressive medium environment, be difficult for being corroded, the long service life of inhalation valve.When use, the first opening and tank body are tightly connected, in the time that tank internal pressure is greater than atmospheric pressure, and negative pressure flap assembly closure, malleation flap assembly is opened, and medium is discharged release from malleation flap mount inlet; In the time that tank internal pressure is less than atmospheric pressure, malleation flap assembly closure, negative pressure flap assembly is opened, and air flows in tank body and increases from negative pressure flap mount inlet.
Embodiment 2: a kind of anti-rotten lining type inhalation valve (referring to accompanying drawing 2), its structure is similar to embodiment 1, main difference point is that the outside of directional post on malleation valve body is sealedly connected with collecting box 27, collecting box inwall is lined with anticorrosive coat, collecting box left side is provided with collects mouth 28, collecting box upper end is provided with malleation valve gap connection mouth, collecting box lower end is provided with the through hole being communicated with malleation flap mount inlet, on malleation valve gap connection mouth, removable seal is connected with malleation valve gap 34, and malleation flap assembly is connected between malleation valve gap and malleation flap mount inlet.Other structure is identical with embodiment 1.The medium that this structure setting is discharged release collects by collecting box, convenient recovery and utilization again.
Embodiment 3: a kind of anti-rotten lining type inhalation valve (referring to accompanying drawing 3), its structure is similar to embodiment 1, main difference point is that positive guide sleeve upper end is connected with connecting base 20, connecting base is socketed with bonnet 21 outward, in connecting base, be connected with Adjusting bolt Adjusting screw 22, malleation valve rod is socketed in Adjusting bolt Adjusting screw, malleation valve rod upper connecting base below is socketed with return spring 23, the two ends of malleation valve rod position last time spring are connected with respectively upper spring seat 24 and lower spring cup 25, and the lower end of Adjusting bolt Adjusting screw is connected on upper spring seat.Other structure is identical with embodiment 1.The atmospheric pressure being subject to when malleation flap adds that the elastic force of return spring adds the gravity sum of malleation flap and malleation valve rod while being greater than medium in tank to the pressure of positive valve lobe, malleation flap closure; Otherwise malleation flap is opened, malleation valve rod moves up in pilot hole.This mode can make the higher force value of maintenance in tank, and can regulate the elastic force effect of return spring to positive valve lobe by rotation Adjusting bolt Adjusting screw, thereby changes the cracking pressure of malleation flap, easy to adjust, uses flexibly.
Above-described embodiment is three kinds of schemes preferably of the present utility model, not the utility model is done to any pro forma restriction, also has other variant and remodeling under the prerequisite that does not exceed the technological scheme that claim records.
Claims (8)
1. an anti-rotten lining type inhalation valve, it is characterized in that, comprise malleation valve body and negative pressure valve body, malleation valve pocket and negative pressure valve pocket are set respectively in malleation valve body and negative pressure valve body, malleation valve pocket and negative pressure valve pocket are communicated with, malleation valve pocket and negative pressure valve cavity wall are all lined with corrosion protective lining, malleation valve body is provided with the first opening, the second opening, malleation flap mount inlet, negative pressure valve body is provided with the 3rd opening, negative pressure flap mount inlet, the second opening is connected by flange removable seal with the 3rd opening, on malleation flap mount inlet, be connected with malleation flap assembly, on negative pressure flap mount inlet, be connected with negative pressure flap assembly, malleation flap assembly and negative pressure flap assembly all vertically arrange, malleation flap assembly is arranged on malleation valve pocket outside, negative pressure flap assembly is arranged on negative pressure valve pocket inside.
2. anti-rotten lining type inhalation valve according to claim 1, it is characterized in that, malleation flap assembly comprises malleation flap, malleation valve rod, positive guide sleeve, malleation valve rod and positive guide sleeve vertically arrange, malleation valve rod lower end is vertically connected on malleation flap, malleation flap lower surface is lined with anticorrosive coat, on malleation valve body, be laid with several directional posts near malleation flap mount inlet one circle, directional post upper end is all fixedly connected on protection apron, between adjacent two directional posts, be all connected with filter screen, positive guide sleeve is arranged on protection apron neutral position, positive guide sleeve lower end is provided with the pilot hole of vertical setting, malleation valve rod is actively socketed in pilot hole.
3. anti-rotten lining type inhalation valve according to claim 2, it is characterized in that, positive guide sleeve upper end is connected with connecting base, connecting base is socketed with bonnet outward, in connecting base, be connected with Adjusting bolt Adjusting screw, malleation valve rod is socketed in Adjusting bolt Adjusting screw, and malleation valve rod upper connecting base below is socketed with return spring, the two ends of malleation valve rod position last time spring are connected with respectively upper spring seat and lower spring cup, and the lower end of Adjusting bolt Adjusting screw is connected on upper spring seat.
4. according to the anti-rotten lining type inhalation valve described in claim 2 or 3, it is characterized in that, on protection apron, be connected with the protective housing arranging down, protective housing lower ending opening.
5. anti-rotten lining type inhalation valve according to claim 1, it is characterized in that, on malleation valve body, the outside of directional post is sealedly connected with collecting box, collecting box inwall is lined with anticorrosive coat, collecting box left side is provided with collects mouth, and collecting box upper end is provided with malleation valve gap connection mouth, and collecting box lower end is provided with the through hole being communicated with malleation flap mount inlet, on malleation valve gap connection mouth, removable seal is connected with malleation valve gap, and malleation flap assembly is connected between malleation valve gap and malleation flap mount inlet.
6. according to the anti-rotten lining type inhalation valve described in claim 1 or 2 or 3, it is characterized in that, negative pressure flap assembly comprises negative pressure flap, negative pressure valve rod, negative pressure valve gap, on negative pressure flap outer surface, be lined with anticorrosive coat, negative pressure valve rod is vertically connected on negative pressure flap, negative pressure valve gap is tubular structure and upper end closed lower ending opening, and negative pressure valve rod movable upper end is socketed in negative pressure valve gap, and negative pressure valve gap inwall is lined with corrosion protective lining.
7. according to the anti-rotten lining type inhalation valve described in claim 1 or 2 or 3, it is characterized in that, positive valve cavity wall is provided with a circle locating slot near malleation flap mount inlet position, and on malleation valve body, the first opening end and the second opening end position are equipped with a circle locating slot; Negative pressure valve cavity wall is provided with a circle locating slot near negative pressure flap mount inlet position, on negative pressure valve body, the 3rd opening end is provided with a circle locating slot, the width that locating slot cross section is all isosceles trapezoidal structure and locating slot opening is all less than the width of bottom surface, and corrosion protective lining serves as a contrast in locating slot.
8. according to the anti-rotten lining type inhalation valve described in claim 1 or 2 or 3, it is characterized in that, on negative pressure valve body, negative pressure flap mount inlet position is connected with annular pressing plate, between pressing plate and negative pressure valve body, is connected with filter screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420487168.5U CN204025802U (en) | 2014-08-22 | 2014-08-22 | Anti-rotten lining type inhalation valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420487168.5U CN204025802U (en) | 2014-08-22 | 2014-08-22 | Anti-rotten lining type inhalation valve |
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| Publication Number | Publication Date |
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| CN204025802U true CN204025802U (en) | 2014-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420487168.5U Expired - Fee Related CN204025802U (en) | 2014-08-22 | 2014-08-22 | Anti-rotten lining type inhalation valve |
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| CN (1) | CN204025802U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110173583A (en) * | 2019-05-27 | 2019-08-27 | 杭州富阳松连食品有限公司 | A kind of edible oil oil storage tank sole weight type respiratory valve of sectional preset pressure |
| CN114321458A (en) * | 2021-12-29 | 2022-04-12 | 徐州盛安工业安全检测研究院有限公司 | Balanced pneumatic breather valve and working method |
| CN115570781A (en) * | 2022-10-04 | 2023-01-06 | 罗浮阀门集团有限公司 | Valve body lining process of safety valve |
-
2014
- 2014-08-22 CN CN201420487168.5U patent/CN204025802U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110173583A (en) * | 2019-05-27 | 2019-08-27 | 杭州富阳松连食品有限公司 | A kind of edible oil oil storage tank sole weight type respiratory valve of sectional preset pressure |
| CN110173583B (en) * | 2019-05-27 | 2020-09-04 | 杭州富阳松连食品有限公司 | Self-weight breather valve capable of achieving segmented pressure presetting for edible oil storage tank |
| CN114321458A (en) * | 2021-12-29 | 2022-04-12 | 徐州盛安工业安全检测研究院有限公司 | Balanced pneumatic breather valve and working method |
| CN114321458B (en) * | 2021-12-29 | 2024-04-09 | 徐州盛安工业安全检测研究院有限公司 | Balanced aerodynamic breather valve and working method |
| CN115570781A (en) * | 2022-10-04 | 2023-01-06 | 罗浮阀门集团有限公司 | Valve body lining process of safety valve |
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| 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: 20141217 Termination date: 20210822 |
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| CF01 | Termination of patent right due to non-payment of annual fee |