CN205592645U - Disk seat and use gas bottle valve of this disk seat - Google Patents
Disk seat and use gas bottle valve of this disk seat Download PDFInfo
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- CN205592645U CN205592645U CN201620197328.1U CN201620197328U CN205592645U CN 205592645 U CN205592645 U CN 205592645U CN 201620197328 U CN201620197328 U CN 201620197328U CN 205592645 U CN205592645 U CN 205592645U
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Abstract
The utility model relates to a disk seat and use gas bottle valve of this disk seat, gas bottle valve include and are equipped with the disk seat in the valve pocket of valve body by the valve body, still are equipped with case and reset spring in the valve pocket, and the disk seat includes valve seat body, and valve seat body is last to be equipped with the disk seat that the direction is extended about along and to perforate, and the fenestrate one end of disk seat is the orientation the sealed end of case, the fenestrate sealed end of disk seat be equipped with with the case seals complex valve seat insert, and valve seat insert fixes on valve seat body by wearing the fixed cover of cover in the disk seat is perforated, fixed cover with the corresponding one end of the fenestrate sealed end of disk seat set firmly with valve seat insert roof pressure complex roof pressure board, other end an organic whole of fixed cover is equipped with the fixed valgus along of block face block complex who rolls over with the corresponding stomidium mouth of disk seat perforation place to turning up. Fixed valgus along that the one end of utilizing fixed cover was equipped with will fix the cover and fix in the fixed effect of valve seat body's mode betterly, and assembly, fixed seal circle are also comparatively convenient.
Description
Technical field
This utility model relates to a kind of valve seat and uses the bottle valve of this valve seat.
Background technology
Bottle valve is the significant components that gas cylinder venting controls, and at home and abroad all has use on the launcher gas cylinder of Multiple Type, and operating pressure is higher.At present, the bottle valve that launcher gas cylinder is used mostly is imported product, and the product purchasing cycle is long, expensive, no matter from using angle or economically, cost is the highest.
nullA kind of bottle valve is disclosed in the Chinese invention patent that Authorization Notice No. is CN102032441B，Valve body including upper and lower both ends open，Two openings communicate the pipeline forming gas circulation，Upper end is valve port end、Lower end is to connect a bottle end for connect gas cylinder，A guide pin bushing is had along pipeline bearing of trend slidable fit in the pipeline of valve body upper end，The air flue of connection gas is had on guide pin bushing，Be connected valve port defecator in the bottom of guide pin bushing，Valve port defecator top is located on the valve rod of an inverted T shape，Stem lower portion is arranged with cone-shaped sealed gland，Closely cooperate with the pipeline sidewall of correspondence position，Valve body lower end portion below valve rod is provided with bottleneck defecator，Valve rod head is provided with nut，Valve interior wall below nut is provided with limiting stand terrace upward，The spring applying active force upwards to valve rod it is provided with between nut and limiting stand terrace，Coordinate with the valve base sealing being provided with valve body to force valve rod to move up with cone-shaped sealed gland，Valve seat is provided with the perforation passed for valve rod，The aperture, one end towards the spool as cone-shaped sealed gland of perforation has the taper hole section with cone-shaped sealed gland corresponding matching.When valve rod moves down, driving cone-shaped sealed gland to move down and depart from valve seat, the gas in whole valve body will connect.In use, the contact pin of electromagnetic valve inserts valve port, top pressure guide pin bushing to this bottle valve, and then drives valve port defecator, valve rod to move downwardly together, and extrusion spring, cone-shaped sealed gland departs from valve seat, and valve body gas circuit turns on, it is possible to be inflated or deflation operations.
In above-mentioned bottle valve, the seal cone seal that coordinate corresponding with valve seat is set on valve rod, when valve rod in the raw time, spring needs to overcome valve rod, nut, cone-shaped sealed gland and the gravity of fixing cone-shaped sealed gland, it is fixed on the sealing station coordinated with valve base sealing to be press-fited by cone-shaped sealed gland, spring needs the load born relatively big, particularly when shaft length is longer, requires higher to spring, spring is relatively costly, pretension the most more inconvenience.
Utility model content
This utility model provides a kind of valve seat, to solve to be located on valve rod by ring structure on bottle valve of the prior art to cause spring to bear the technical problem that load is bigger；Meanwhile, this utility model also provides for a kind of bottle valve using above-mentioned valve seat.
The technical scheme of valve seat provided by the utility model is: a kind of valve seat, including valve seat body, valve seat body is provided with valve seat perforation, one end of valve seat perforation is for the sealed end towards the spool coordinated with valve base sealing, the sealed end of valve seat perforation is provided with the valve seat insert for coordinating with described seal spool, valve seat insert is fixed in valve seat body by the fixed cover being set in valve seat perforation, one end that the sealed end with valve seat perforation of fixed cover is corresponding is installed with and the top pressing board of described valve seat insert top press-fit, the other end of fixed cover be integrally formed with outwards turnover coordinates with the stopping surface block with valve seat perforation place, respective end aperture so that fixed cover is fixed in described valve seat body fixing outside turn edge.
Having the cascaded surface shoulder hole section towards described spool at the aperture of the sealed end of described valve seat perforation, described valve seat insert is arranged on the cascaded surface block top press-fit of the big footpath Duan Chu of described shoulder hole section, valve seat insert and shoulder hole section.
nullThe technical scheme of bottle valve provided by the utility model is: bottle valve，It is to connect a bottle end for connect gas cylinder including the left end extended in left-right direction、Right-hand member is the valve body of valve port end，Valve body has the valve pocket of connection valve body left and right end，Valve pocket is provided with valve seat，Valve pocket is additionally provided with spool and applies, to spool, the back-moving spring that active force coordinates with valve base sealing to drive spool to move towards valve seat，Valve seat includes valve seat body，Valve seat body is provided with the valve seat perforation extended in left-right direction，One end of valve seat perforation is the sealed end towards described spool，The sealed end of valve seat perforation is provided with the valve seat insert coordinated with described seal spool，Valve seat insert is fixed in valve seat body by the fixed cover being set in valve seat perforation，One end that the sealed end with valve seat perforation of fixed cover is corresponding is installed with and the top pressing board of described valve seat insert top press-fit，The other end of fixed cover be integrally formed with outwards turnover coordinates with the stopping surface block with valve seat perforation place, respective end aperture so that fixed cover is fixed in described valve seat body fixing outside turn edge.
Having the cascaded surface shoulder hole section towards described spool at the aperture of the sealed end of described valve seat perforation, described valve seat insert is arranged on the cascaded surface block top press-fit of the big footpath Duan Chu of described shoulder hole section, valve seat insert and shoulder hole section.
Described spool is arranged in the left side of described valve seat, and the right-hand member of spool seals with described valve seat insert and coordinates, and back-moving spring is arranged in the left side of described valve seat, and back-moving spring is the helical compression spring of left end and the press-fit of valve body top, right-hand member and described spool top press-fit.
In described valve pocket, on the right side of described valve seat, guiding movement is equipped with valve port filter in left-right direction, valve port filter or valve body are provided with and ensure that valve port filter moves the inner seal circle that sealing coordinates with valve body, and described valve port filter has correspondence and is arranged in the gas feed on the left of described inner seal circle and is arranged in the gas outlet on the right side of described inner seal circle.
Described spool has for the centre bore through described fixed cover with the valve rod with described valve port filter top press-fit, valve rod guides with the centre bore of described fixed cover and coordinates, and is provided with gas passage gaps between the centre bore of the outer peripheral face of valve rod and described fixed cover.
Described valve body includes that main valve body and spiral are assemblied in the end cap of main valve body right-hand member, end cap seals with main valve body and coordinates, described end cap has the through hole extended in left-right direction, the right-hand member aperture of through hole is the right-end openings of described valve body, and described inner seal circle is located at the left end of described through hole.
Bottle end spiral that connects of described valve body is equipped with filter swivel nut, filter swivel nut right-hand member is provided with the bottleneck wire gauzee filter being sealed on filter swivel nut endoporus, the left end of described back-moving spring by top be pressed on described bottleneck wire gauzee filter with described valve body top press-fit.
The beneficial effects of the utility model are: in valve seat provided by the utility model, valve seat insert is arranged in valve seat body, and, owing to one end of fixed cover is provided with and the top pressing board of valve seat insert top press-fit, the other end is provided with outwards turnover and coordinates with the stopping surface block with valve seat perforation place, respective end aperture and then fixed cover and valve seat insert be fixed on valve group body, so, when by this valve seat applications on bottle valve, valve seat insert is located on valve seat, need not on spool, be located at sealing ring and the structure for fixed seal ring again, so can effectively alleviate the load that whole spool is applied to back-moving spring, such that it is able to reduce the requirement to back-moving spring.And, the fixed effect utilizing the fixing outer mode that fixed cover is fixed on valve seat body that turns edge that one end of fixed cover is provided with is preferable, and assembling, fixed seal ring are the most more convenient.
Further, shoulder hole section is set at the aperture of the sealed end of valve seat perforation, it is simple to place valve seat insert, and then facilitate implementation the location of the assembling to valve seat insert, assemble more convenient.
Further, spool is arranged in the left side of valve seat, simultaneously, back-moving spring is also disposed at the left side of valve seat, so, back-moving spring is possible not only to utilize the mobile space at spool place to be compressed, simultaneously, the bottleneck wire gauzee filter being arranged on the left of valve seat can also be compressed, it is ensured that effective filtration of bottleneck wire gauzee filter.
Further, being arranged in the filter on the right side of valve seat and directly push up and be pressed on spool, so, when filter pressurized moves towards left side, filter can overcome action of reset spring power to push up pressure valve core and be moved to the left, such that it is able to open bottle valve.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of embodiment of bottle valve provided by the utility model；
Fig. 2 is the structural representation of the end cap of bottle valve shown in Fig. 1；
Fig. 3 is the structural representation of the valve body of bottle valve shown in Fig. 1；
Fig. 4 is enlarged drawing at A in Fig. 3；
Fig. 5 is that bottle valve shown in Fig. 1 is arranged on working state schematic representation on gas cylinder.
Detailed description of the invention
nullAs shown in Figures 1 to 5，A kind of embodiment of bottle valve，Bottle valve in this embodiment includes valve body 1，Valve body 1 has left and right both ends open，Valve body 1 left end is to connect a bottle end for connect gas cylinder、Right-hand member is for the valve port end with corresponding electromagnetic valve inserting，Valve body has the valve pocket of connection valve body left and right end opening，Valve pocket is provided with valve seat 101，The inner chamber of valve body is divided into and is arranged in the valve seat left and right sides and by the left chamber 103 of the corresponding connection of valve seat perforation 105 on valve seat 101 and right chambeies 104 by valve seat 101，Right chamber 104 leads to move in left-right direction and is equipped with valve port filter 2，Valve port filter 2 is coordinated with valve body 1 movable sealing by inner seal circle 15，In left chamber 103, guiding movement is equipped with spool 9 in left-right direction，It is additionally provided with back-moving spring 10 in the left side of spool 9 in left chamber 103，Back-moving spring 10 applies to force spool 9 to move right with valve seat 101 sealing to spool 9 and coordinates the active force closing whole bottle valve，Back-moving spring 10 herein is specially left end and the press-fit of valve body top、Right-hand member and spool 9 push up the helical compression spring of press-fit，Spool 9 is provided with the valve rod 91 extended in left-right direction，Valve rod 91 passes valve seat perforation 105 in left-right direction and extends in right chamber 104，So can be when valve port filter 2 be moved to the left by top pressure to the left，The active force of back-moving spring can be overcome and pushing tow spool 13 is moved to the left，Spool 13 is separated with valve seat，Open bottle valve.Specifically can be pushed up press-fit by the end push rod 21 being arranged in valve port filter 2 left end with valve rod 91.
It should be noted that spool 9 guiding movement is assemblied in right chamber 103, and between the internal chamber wall in spool 9 and right chamber 103, there is airflow clearance, to ensure the normal ventilation when spool 9 departs from valve seat 101.Specifically spool 9 is designed to flat structure, is so ensureing the situation of guiding, airflow clearance can be formed very easily between spool and right chamber.
Meanwhile, it is provided with direction recess in the left side of spool 9, the inserting corresponding with the right-hand member of back-moving spring 10 of this direction recess, the guide-localization to back-moving spring can be formed.
Valve seat 101 includes valve seat body, valve seat body is provided with the valve seat perforation 105 for connecting left chamber and right chamber extended in left-right direction, one end of valve seat perforation 105 is the sealed end towards spool 9, the sealed end of valve seat perforation 105 is provided with the valve seat insert 14 coordinated with seal spool, valve seat insert 14 is fixed in valve seat body by the fixed cover 13 being set in valve seat perforation 105, one end that the sealed end with valve seat perforation of fixed cover 13 is corresponding is installed with the top pressing board 131 with the press-fit of valve seat insert top, the other end of fixed cover 13 be integrally formed with outwards turnover coordinates with the stopping surface block with valve seat perforation place, respective end aperture so that fixed cover is fixed in valve seat body fixing outside turn edge 132.
It should be noted that for improving sealing effectiveness, also allowing for realizing spool coordinates with the sealing of valve seat, valve seat insert 14 herein protrudes from the left side of valve seat body and arranges, it is simple to the annular seal lip interruption-forming being provided with spool seals and coordinates.In order to avoid spool is formed interference, the top pressing board that fixed cover 13 left end is provided with then is positioned at inside ring packing lip.The top pressing board of fixed cover 13 left end is the outer land structure that fixed cover left end is provided with.
Specifically, in the present embodiment, at the aperture of the sealed end of valve seat perforation 105, there is the cascaded surface shoulder hole section towards spool 9, valve seat insert 14 is arranged on the big footpath Duan Chu of shoulder hole section, valve seat insert 14 and the cascaded surface block top press-fit of shoulder hole section, so, by fixed cover 13 with the cascaded surface corresponding matching of shoulder hole section to realize the axial location to valve seat insert 14, and, the location of the radial direction to valve seat insert is formed by the inner peripheral surface of the big footpath section of shoulder hole section, simultaneously, the inner peripheral surface of the outer peripheral face of fixed cover and the endoporus of valve seat insert coincide inserting, so radially and axially realize valve seat insert is fixed by fixed cover and valve seat perforation.
Further, fixed cover 13 herein and the valve rod 91 guiding movement assembling of spool 9, meanwhile, between the endoporus of valve rod 91 and fixed cover 13, it is provided with the gas circuit gap for connecting left chamber 103 and right chamber 104.The right-hand member deviating from described spool of fixed cover 13 is provided with interior land 133, and outer other parts to fixed cover that turn edge that right-hand member so can be avoided outwards to turn down cause stress to disturb, and meanwhile, also allows for use instrument and realizes the outer outside turnover turned edge of fixed cover.
In the present embodiment, bottle end spiral that connects at valve body left end is equipped with filter swivel nut 11, filter swivel nut 11 right-hand member is provided with the bottleneck wire gauzee filter 12 being sealed on filter swivel nut endoporus, the left end of back-moving spring 12 is pressed on bottleneck wire gauzee filter 12 to push up press-fit with valve body 1 by top, meanwhile, bottleneck wire gauzee filter is also press-fited and is fixed on filter swivel nut 11 by back-moving spring 12.
Valve body 1 in the present embodiment includes that main valve body 102 and spiral are assemblied in the end cap 5 of main valve body right-hand member; end cap 5 is coordinated with main valve body 102 sealing by outer side seal circle 16; and there is on end cap 5 through hole 51 extended in left-right direction; the right-hand member aperture of through hole 51 is the right-end openings of valve body 1; right-hand member at through hole 51 is disposed with sealing ring 3 and the guard ring 4 of correspondence; so it is easy to when corresponding inducing QI contact pin is inserted through in hole; avoid gas leak, be protected from simultaneously inducing QI contact pin directly and through hole friction and cause damage.Left end at the through hole 51 of end cap 5 is provided with and ensures that valve port filter 2 moves the inner seal circle 15 that sealing coordinates with valve body, and valve port filter 2 has correspondence and is arranged in the gas feed on the left of inner seal circle 15 and is arranged in the gas outlet on the right side of inner seal circle 15.
The end cap 5 of bottle valve is additionally provided with block 6, so, when bottle valve does not works, generally by block 6 spiral cover on end cap 5.
Further, outside main valve body 102, it is also equipped with sealing ring 8 and guard ring 7, sealing ring 8 and guard ring 7 can be arranged on gas cylinder by bottle valve, it is ensured that the sealing property between bottle valve and gas cylinder.
During use, bottle valve 200 is arranged on gas cylinder 100, as an assembly of control inflating gas cylinder, during use, bottle valve 200 is docked with the electromagnetic valve 300 in launcher, the contact pin 301 of electromagnetic valve 300 heads on valve port filter 2 and moves right, the displacement of valve port filter 2 passes to spool 9, spool 9 compression reseting spring 10, and the ring packing lip on spool 9 is separated with the valve seat insert on valve seat, bottle valve is opened, and gas cylinder starts to supply to launcher.Further, owing to bottle end that connects at bottle valve is provided with left side filter, adds the valve port filter being arranged in valve body right-hand member, use the mode of double medium filtration, it is possible to significantly improve filter effect.
In the present embodiment, valve seat insert is arranged in valve seat body by fixed cover, top pressing board on fixed cover is structure as a whole with fixed cover, in other embodiments, on fixed cover can be also Split type structure with fixed cover for pushing up the top pressing board of pressure valve seat insert, as utilized bolt fastening structure or weld connection structure to be fixed on fixed cover by top pressing board.
In the present embodiment, sealed end in valve seat perforation arranges corresponding shoulder hole section, so it is easy to arrange valve seat insert, in other embodiments, shoulder hole section can also be saved, but valve seat insert is directly anchored on one end end face of valve seat, now, utilize fixed cover and valve seat to realize the axial location to valve seat insert, utilize fixed cover self to realize the radial direction to valve seat insert and position.
In the present embodiment, back-moving spring and spool are positioned in left chamber, and valve port filter is then positioned in right chamber, as such, it is possible to make full use of left chamber and the space in right chamber that valve seat is separated, reduce the volumetric bulk of whole bottle valve as far as possible.In other embodiments, it is also possible to the bottle valve disclosed in the Chinese utility model patent that Authorization Notice No. is CN102032441B is the same, back-moving spring and valve port filter are arranged in the same side of valve seat.
This utility model also provides for the embodiment of a kind of valve seat, and the structure of the valve seat in this embodiment is identical with the structure of the valve seat in above-mentioned bottle valve embodiment, does not repeats them here.This valve seat construction cannot be only used for, in above-mentioned bottle valve, also can be applicable in other kinds of valve.
Claims (9)
1. a valve seat, including valve seat body, valve seat body is provided with valve seat perforation, one end of valve seat perforation is for the sealed end towards the spool coordinated with valve base sealing, it is characterized in that: the sealed end of valve seat perforation is provided with the valve seat insert for coordinating with described seal spool, valve seat insert is fixed in valve seat body by the fixed cover being set in valve seat perforation, one end that the sealed end with valve seat perforation of fixed cover is corresponding is installed with and the top pressing board of described valve seat insert top press-fit, the other end of fixed cover be integrally formed with outwards turnover coordinates with the stopping surface block with valve seat perforation place, respective end aperture so that fixed cover is fixed in described valve seat body fixing outside turn edge.
Valve seat the most according to claim 1, it is characterized in that: at the aperture of the sealed end of described valve seat perforation, there is the cascaded surface shoulder hole section towards described spool, described valve seat insert is arranged on the cascaded surface block top press-fit of the big footpath Duan Chu of described shoulder hole section, valve seat insert and shoulder hole section.
null3. bottle valve，It is to connect a bottle end for connect gas cylinder including the left end extended in left-right direction、Right-hand member is the valve body of valve port end，Valve body has the valve pocket of connection valve body left and right end，Valve pocket is provided with valve seat，Valve pocket is additionally provided with spool and applies, to spool, the back-moving spring that active force coordinates with valve base sealing to drive spool to move towards valve seat，Valve seat includes valve seat body，Valve seat body is provided with the valve seat perforation extended in left-right direction，One end of valve seat perforation is the sealed end towards described spool，It is characterized in that: the sealed end of valve seat perforation is provided with the valve seat insert coordinated with described seal spool，Valve seat insert is fixed in valve seat body by the fixed cover being set in valve seat perforation，One end that the sealed end with valve seat perforation of fixed cover is corresponding is installed with and the top pressing board of described valve seat insert top press-fit，The other end of fixed cover be integrally formed with outwards turnover coordinates with the stopping surface block with valve seat perforation place, respective end aperture so that fixed cover is fixed in described valve seat body fixing outside turn edge.
Bottle valve the most according to claim 3, it is characterized in that: at the aperture of the sealed end of described valve seat perforation, there is the cascaded surface shoulder hole section towards described spool, described valve seat insert is arranged on the cascaded surface block top press-fit of the big footpath Duan Chu of described shoulder hole section, valve seat insert and shoulder hole section.
5. according to the bottle valve described in claim 3 or 4, it is characterized in that: described spool is arranged in the left side of described valve seat, the right-hand member of spool seals with described valve seat insert and coordinates, back-moving spring is arranged in the left side of described valve seat, and back-moving spring is the helical compression spring of left end and the press-fit of valve body top, right-hand member and described spool top press-fit.
Bottle valve the most according to claim 5, it is characterized in that: in described valve pocket, on the right side of described valve seat, guiding movement is equipped with valve port filter in left-right direction, valve port filter or valve body are provided with and ensure that valve port filter moves the inner seal circle that sealing coordinates with valve body, and described valve port filter has correspondence and is arranged in the gas feed on the left of described inner seal circle and is arranged in the gas outlet on the right side of described inner seal circle.
Bottle valve the most according to claim 6, it is characterized in that: described spool has for the centre bore through described fixed cover with the valve rod with described valve port filter top press-fit, valve rod guides with the centre bore of described fixed cover and coordinates, and is provided with gas passage gaps between the centre bore of the outer peripheral face of valve rod and described fixed cover.
Bottle valve the most according to claim 6, it is characterized in that: described valve body includes that main valve body and spiral are assemblied in the end cap of main valve body right-hand member, end cap seals with main valve body and coordinates, described end cap has the through hole extended in left-right direction, the right-hand member aperture of through hole is the right-end openings of described valve body, and described inner seal circle is located at the left end of described through hole.
Bottle valve the most according to claim 5, it is characterized in that: bottle end spiral that connects of described valve body is equipped with filter swivel nut, filter swivel nut right-hand member is provided with the bottleneck wire gauzee filter being sealed on filter swivel nut endoporus, the left end of described back-moving spring by top be pressed on described bottleneck wire gauzee filter with described valve body top press-fit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620197328.1U CN205592645U (en) | 2016-03-15 | 2016-03-15 | Disk seat and use gas bottle valve of this disk seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620197328.1U CN205592645U (en) | 2016-03-15 | 2016-03-15 | Disk seat and use gas bottle valve of this disk seat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205592645U true CN205592645U (en) | 2016-09-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620197328.1U Active CN205592645U (en) | 2016-03-15 | 2016-03-15 | Disk seat and use gas bottle valve of this disk seat |
Country Status (1)
| Country | Link |
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| CN (1) | CN205592645U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105570681A (en) * | 2016-03-15 | 2016-05-11 | 凯迈（洛阳）气源有限公司 | Valve seat and cylinder valve using same |
| CN112879614A (en) * | 2021-01-16 | 2021-06-01 | 新乡市赛特钢瓶有限公司 | Constant pressure process valve for preparing porous packing of acetylene cylinder |
| WO2023103238A1 (en) * | 2021-12-06 | 2023-06-15 | 北京航天石化技术装备工程有限公司 | One-way finish valve suitable for hydrogen-energy handheld torch |
-
2016
- 2016-03-15 CN CN201620197328.1U patent/CN205592645U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105570681A (en) * | 2016-03-15 | 2016-05-11 | 凯迈（洛阳）气源有限公司 | Valve seat and cylinder valve using same |
| CN112879614A (en) * | 2021-01-16 | 2021-06-01 | 新乡市赛特钢瓶有限公司 | Constant pressure process valve for preparing porous packing of acetylene cylinder |
| CN112879614B (en) * | 2021-01-16 | 2022-06-28 | 新乡市赛特钢瓶有限公司 | Constant pressure process valve for preparing porous packing of acetylene cylinder |
| WO2023103238A1 (en) * | 2021-12-06 | 2023-06-15 | 北京航天石化技术装备工程有限公司 | One-way finish valve suitable for hydrogen-energy handheld torch |
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