CN202884144U - High pressure water pressure regulating valve - Google Patents
High pressure water pressure regulating valve Download PDFInfo
- Publication number
- CN202884144U CN202884144U CN 201220330485 CN201220330485U CN202884144U CN 202884144 U CN202884144 U CN 202884144U CN 201220330485 CN201220330485 CN 201220330485 CN 201220330485 U CN201220330485 U CN 201220330485U CN 202884144 U CN202884144 U CN 202884144U
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- valve
- high pressure
- pressure water
- seal ring
- block
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Abstract
A high pressure water pressure regulating valve comprises an adjustment nut, a valve cover, a valve rod, dish-shaped spring columns, valve sheets, valve seats, valve elements, a valve body, sealing rings and the like. The high pressure water pressure regulating valve is provided with a high pressure water inlet, a high pressure water outlet and an overflow water overflow port. The valve seats, the valve elements and the sealing rings are sequentially installed in an inner cavity of the valve body according to requirements. The adjustment nut, the valve rod, the disc-shaped spring columns and gaskets are sequentially installed at the upper ends of the valve sheets which are matched with the arc surfaces of the valve seats according to requirements. Through rotating the adjustment nut, a user adjusts the compression deformation of the butterfly-shaped spring columns to adjust the elasticity of the dish-shaped spring columns, and therefore the opening degrees of the valve seats and the valve sheets are adjusted, and pressure of the high pressure water device can be adjusted when the flow quantity for overflow is changed. The pressure regulating valve is simple in structure, stable in adjusted pressure, and convenient to operate.
Description
One, technical field
The utility model relates to high-pressure water shot flow device pressure regulator, especially can guarantee the pressure regulator valve of the unnecessary flow of simultaneously overflow of high-pressure water shot flow device constant pressure.
Two, background technique
High pressure water jet is the new and high technology that eighties of last century develops rapidly the beginning of the seventies abroad, the every field such as its extensive use metallurgy, machinery, oil, chemical industry, boats and ships, electronics, municipal administration.This year, this technology such as cut at the field in the industry cleaning link of China, petroleum drilling and mining, rust cleaning engineering, water.The safety of high-pressure water shot flow device, off-load, control be unable to do without various forms of valves.The valve of high-pressure water shot flow device commonly used has safety valve, high pressure water pressure regulator valve, high pressure water pressure adjustment relief valve, reduction valve etc.The effect of high pressure water pressure regulator valve is to guarantee that high pressure water loop or system pressure keep stable.Realize the effect of steady pressure, adjusting pressure, restriction pressure.Along with the development of high pressure water jet and the extensive use of high-pressure water shot flow device need the more pressure regulator valve of kind specification to satisfy usage requirement.
Three, model utility content
The utility model provides a kind of can be guaranteed under any pressure of high-pressure water shot flow device pressure in specified pressure regulation range stable operation and follow overflow namely to depart from declared working condition pressure, the pressure regulator valve of the unnecessary flow of overflow.
The technical solution adopted in the utility model: the high pressure water pressure regulator valve is comprised of regulating nut, packing ring, valve gap, spacing shim, pad, valve rod, stack of Belloville springs, spool, valve core seal ring, valve block, valve block seal ring, support ring, valve seat, valve seat insert, valve body.It is characterized in that: valve block, spool and valve seat are arranged in the valve body chamber, and the exterior arc surface of valve block and the inner arc surface of valve seat cooperate; Spool is fixed on valve inner by the screw-thread fit of valve gap and valve body; Valve block produces axial force upwards under the pressure-acting of high pressure water, overcome stack of Belloville springs elastic force under this power effect, makes valve block axial displacement in the spool cylindrical hole; Valve rod, stack of Belloville springs, pad are positioned at valve cover cavity, regulating nut and valve gap screw thread screw, follow overflow namely to depart from declared working condition in valve seat female cone post hole simultaneously by the pressure that the change regulating nut can be regulated high pressure water jet equipment with respect to the axial position of valve gap, overflow unnecessary flow.Valve seat is arranged in body cavity, and the following part external cylindrical surface of the step of valve seat and body cavity cylndrical surface cooperate; In the valve seat insert groove seal ring is housed, sealing circle and valve body cylindrical hole internal surface cooperate, and prevent that high pressure water from leaking into high pressure water pressure regulator valve flow-off.The step plane of the step plane of valve seat and body cavity lower side cooperates, and defines valve seat in the interior position of valve pocket.Spool is arranged in body cavity, and the inner chamber cylndrical surface of spool outer cylinder surface and valve body cooperates; In the valve core seal ring groove seal ring is housed, sealing circle and valve body cylindrical hole internal surface cooperate, and prevent that high pressure water from leaking into part in the valve cover cavity.The step plane of the lower end surface of spool and the top end of valve body cooperates, and defines the position of spool in body cavity.Valve block is arranged in the cylindrical hole of spool, and valve block and valve seat arc surface cooperate airtight, prevents that high pressure water from leaking.Define simultaneously the lowest positions of valve block in the interior cylindrical hole of spool, seal ring and support ring are housed in the valve block o-ring groove, sealing circle, support ring and spool cylindrical hole surface engagement prevent that high pressure water from leaking into part in the valve cover cavity.Define under the effect of the spacing shim in valve cover cavity valve block spool position, the top, guarantee valve block axial exact shift in the cylindrical hole in spool.Cylindrical hole cooperates in the step lower end external cylindrical surface of valve rod and the center of valve block upper-end surface, and the step plane of valve rod and the upper-end surface of valve block cooperate, the position of the valve rod of restriction.The stack of Belloville springs inner hole sleeve is at the step surface upper end of valve rod cylindrical section, and pad all is equipped with at the up and down two ends of stack of Belloville springs, defines the position of stack of Belloville springs, and pad has increased the fitting surface of disc spring film.The inner hole sleeve of spacing shim is in the valve rod upper end, and the spacing shim excircle part has two to protrude rectangular block, and the rectangle groove of two symmetries of this rectangular block and valve gap cooperates.Spacing shim can only axial displacement in the rectangle groove of the symmetry of valve gap, can not swing offset.Valve gap and valve body screw thread cooperate, and the lower end surface of valve gap and the step surface of spool cooperate, and the cylndrical surface of valve gap inner chamber and the step of spool upper end external cylindrical surface cooperate, the cooperation position of the screw thread of restriction, and the spool that limits is in the endoceliac fixed position of valve.Packing ring is arranged in the inner chamber of valve gap, and the inner hole sleeve of packing ring is in the valve rod upper end, and the upper end central bore flank of thread of the external cylindrical surface of packing ring and valve gap cooperates the position of the packing ring of restriction.The inner hole thread at regulating nut and center, valve gap upper-end surface cooperates, and the endoporus cylndrical surface of regulating nut and the external cylindrical surface of valve rod epimere cooperate, and guarantee that valve rod remains on the middle position of valve gap; The compress variation of regulating stack of Belloville springs by the rotation regulating nut is adjusted the elastic force of stack of Belloville springs, thereby the valve block of opening and the relative space of valve seat overflow flow, adjustable fixed system pressure from the female cone post hole of valve seat; It is stable that regulating nut keeps under the acting in conjunction of the active force of stack of Belloville springs and spacing shim after being adjusted to the position of requirement, guarantees that set pressure is stable.
The outer surface of described valve body is the less cylinder table terrace of the larger lower end diameter of the less mid diameter of upper end diameter, step is the transition of circular cone post, middle than processing two symmetries on the great circle cylinder and being tangential on two ends than the plane on small column surface, these two planes are the dismantling device position, the central position on two planes respectively processes an interior tooth pipe thread hole, import and outlet that these two holes are high pressure water, non-directional; Two symmetries of the outer cylinder surface of lower end small diameter processing and perpendicular to two of midplane than facet, this plane is the dismantling device position.The inner chamber of described valve body is the larger-diameter internal thread step hole of upper axial end, and the outside thread of this screw thread and valve gap lower end screws; The less exterior arc surface of step plane is transitioned into hole, larger-diameter interior cylinder table rank, and the cylndrical surface in this hole and the outer surface of spool cooperate, and this step is the spool lower end surface and the position that cooperates of valve body; Step plane is transitioned into the slightly hole, interior cylinder table rank of minor diameter, this hole be valve block at the resigning hole of valve body intrinsic displacement, interfere when avoiding the valve block normal displacement; The circular cone cylinder is transitioned into hole, less interior cylinder table rank, and this hole is that high pressure water is positioned at this hole by hole and valve seat, and this step is the valve seat step surface and the position that cooperates of valve body; The step surface small arc surface is transitioned into the little interior cylindrical hole of this valve body, and the step lower end external cylindrical surface of the surface of this cylindrical hole and valve seat cooperates; The circular cone cylinder is transitioned into cylinder Internal Pipe Thread hole, and this tapped hole is overflow hole (overflow water tap hole).Described valve gap is the slightly cylinder table terrace of minor diameter of major diameter lower end, upper end, and the step place is the transition of circular cone post, two symmetries of processing and be tangential on plane than the small column surface on the big column surface, upper end, and this plane is the dismantling device position; The valve gap upper end face has two symmetrical rectangle grooves, and this rectangle groove can be discharged the gas in the valve cover cavity, checks whether the seal ring of high pressure water pressure regulator valve is normal, limits the stroke of spacing shim.Cooperate mounting limit pad (the protrusion rectangular block of spacing shim is embedded in this rectangle groove) can limit again the stroke of spacing shim, can do also simultaneously to think that whether high pressure water pressure regulator valve seal ring damage observation panel is (if seal ring damages, high pressure water leaks in the valve cover cavity, and water is discharged from this rectangle groove); Interior threaded hole of central position, upper-end surface processing of valve gap, the outside thread of this tapped hole and regulating nut screws; Outside thread of processing on the cylndrical surface, lower end of valve gap, the upper end larger diameter screw-internal thread fit of this screw thread and valve body; When the screw thread of valve gap and valve body screwed, the step surface of valve gap lower end surface and spool cooperated pressed spool when guaranteeing that screw thread is tightened.The inner chamber of described valve gap is holes, larger-diameter interior cylinder table rank.The all external cylindrical surface of the step surface upper end small diameter of while spool and the inner cylindrical surface cooperations in this hole in this step hole of valve rod, stack of Belloville springs, pad, spacing shim.Described valve core outer surface is the larger-diameter cylinder table terrace in small diameter lower end, upper end, processes o-ring groove than great circle cylinder center deviation upper/lower positions, and sealing circle groove dimensions is corresponding with seal ring.The inner chamber of described spool is than the imperial palace cylindrical hole, and the surface in this hole and the outer cylinder surface of valve block cooperate, and valve block is positioned at this hole axial displacement.Described valve block outer surface be upper end external cylindrical surface and lower end than the great circle cambered surface, position, upper middle, cylndrical surface processes seal ring and support ring groove, groove dimensions and seal ring, support ring are corresponding.The central position, upper-end surface of described valve block processes hole, interior cylinder table rank, and the cylndrical surface, step lower end of this hole and valve rod cooperates, and the step surface of this end face and valve rod cooperates.Described valve seat outer surface is the slightly cylinder table terrace of minor diameter of the middle larger diameter small end of upper end small diameter, less inner arc surface transition between cylndrical surface, upper end and the step surface, this arc surface guarantees that high pressure water steadily moves, process o-ring groove in the middle of the cylndrical surface, lower end, the size of sealing circle groove is corresponding with seal ring, and valve seat step surface and body cavity small cylindrical opening step surface cooperate.The inner chamber upper end of described valve seat is the larger diameter inner arc surface, and the exterior arc surface of this arc surface and valve block has cooperated airtight effect, and arc surface is transitioned into the little circular cone post through hole of assigning; The valve seat endoporus is the circular cone columniation structure, prevents from assembling the generation noise from the high pressure water pressure of valve seat endoporus overflow.Described stem exterior surface is the cylinder table terrace of lower side larger diameter lower end small diameter in the middle of the small diameter of upper end, the cylndrical surface of upper end and stack of Belloville springs endoporus cooperate, the inner hole sleeve of belleville spring is on this cylinder, middle larger diameter partly plays position-limiting action, and hole, cylinder table rank cooperates in the center, upper-end surface of the cylndrical surface of lower end small diameter and valve block.Pad is the less hollow cylinder of thickness, and the cylndrical surface, upper end of endoporus and valve rod cooperates, and is enclosed within on the upper end cylinder of valve rod, is positioned at the two ends of the capable spring stack of dish.Described belleville spring is the gasket type spring in truncated cone shape cross section, is formed by metallic material forging and pressing Bear-grudge material, has the strong characteristics of the large buffering absorbing of rigidity.Described spacing shim is the projection of less two rectangles of hollow cylinder outer cylinder surface processing of thickness, the rectangle groove of this rectangle projection and valve gap cooperates, this spacing shim can only axial displacement in the valve gap rectangle groove, can not rotate, can only play the effect that limits displacement range at rectangle groove length range intrinsic displacement again simultaneously.The outer surface of described regulating nut be the hexagonal cylinder lower end of the less thickness in upper end than long threaded rod, the interior threaded hole of this double-screw bolt and valve gap upper-end surface screws.The inner chamber of described regulating nut is holes, interior cylinder table rank, and the upper end external cylindrical surface of this hole and valve rod cooperates, and guarantees that valve rod is in the central position of valve gap all the time.The compress variation of regulating stack of Belloville springs by the rotation regulating nut is adjusted the elastic force of stack of Belloville springs, thereby the valve block of opening and the relative space of valve seat overflow flow, adjustable fixed system pressure from the female cone post hole of valve seat.It is stable that regulating nut keeps under the acting in conjunction of the active force of belleville spring and spacing shim after being adjusted to the position of requirement, guarantees the constant of set pressure.Described packing ring is the less hollow cylinder of thickness, and this packing ring is being enclosed between spacing shim and the regulating nut on the external cylindrical surface of valve rod upper end, and this packing ring guarantees that valve rod is in the central position of valve gap.Described valve core seal ring is O type rubber seal, and the effect of sealing circle prevents that high pressure water from leaking into the inner chamber part of valve gap.Described valve block seal ring is O type rubber seal, and the effect of sealing circle is to prevent that high pressure water from leaking into the inner chamber part of valve gap.Described support ring is flat pad type support ring, and the effect of this support ring is to prevent that high pressure water extruding valve block seal ring from producing the effect of moderate finite deformation protection valve block seal ring.Described valve seat insert is O type rubber seal, and the effect of sealing circle prevents that high pressure water from leaking into overflow hole.
The beneficial effects of the utility model are: high pressure water pressure regulator valve access high-pressure water shot streaming system; change the axial position of regulating nut can control valve seat and the aperture of valve block overflow flow; play any pressure of setting up in system's rated pressure scope and keep being stabilized in this pressure operation; when fortuitous event pressure flip-flop appears in system; valve block changes in the aperture of spool thereupon; overflow the traffic protection security of system, simple in structure easy to adjust.
Four, description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.Obvious described embodiment only is that a part of the present utility model is executed example, rather than all executes example.Based on embodiment of the present utility model, those of ordinary skills belong to protection domain of the present utility model not making the every other embodiment who obtains under the creative work prerequisite.
Fig. 1 is axial section structural representation of the present utility model.
Among Fig. 1,1, regulating nut, 2, packing ring, 3, valve gap, 4, spacing shim, 5, pad, 6, valve rod, 7, stack of Belloville springs, 8, spool, 9, valve core seal ring, 10, valve block, 11, the valve block seal ring, 12, support ring, 13, valve seat, 14, valve seat insert, 15, valve body, 16, high-pressure water inlet, 17, high pressure water water outlet, 18, the overflow water flow-off.
Fig. 2 is monnolithic case schematic diagram of the present utility model.
Five, embodiment
High pressure water pressure regulator valve among Fig. 1 by 1, regulating nut, 2, packing ring, 3, valve gap, 4, spacing shim, 5, pad, 6, valve rod, 7, stack of Belloville springs, 8, spool, 9, valve core seal ring, 10, valve block, 11, valve block seal ring, 12, support ring, 13, valve seat, 14, valve seat insert, 15, valve body, 16, high-pressure water inlet, 17, the high pressure water water outlet, 18, the overflow water flow-off forms.During assembling, at first valve seat insert 14 is installed in the o-ring groove of valve seat 13, valve seat 13 is encased in lower side step hole the valve body 15 from the upper end of valve body 15, valve core seal ring 9 is installed in the o-ring groove of spool 8, spool 8 is encased in the larger-diameter step hole of valve body position from the upper end of valve body 15, valve block seal ring 11 is installed in the common groove of the o-ring groove of valve block 10 and support ring 12, pack into support ring 12 in this groove and place the seal ring upper end.Valve block 10 after installing is encased in the endoporus of spool 8.Valve rod 6 is encased in the upper end center hole of valve block 10, pad 5 is enclosed within the step position that is encased in valve rod on the valve rod, stack of Belloville springs 7 is enclosed within the position that is encased in pad 5 on the valve rod 6, pad 5 is enclosed within the upper end that installs to stack of Belloville springs 7 on the valve rod 6, spacing shim 4 is encased in the rectangle groove of valve gap 3, with valve gap 3 external thread rotaries that install spacing shim 4 be incorporated into valve body 11 than the major thread hole, tighten, pack into packing ring 2 in the upper end screwed hole of centre of valve gap 3 and be enclosed within the upper end of valve rod 6, with the upper end screwed hole of centre that is threaded into valve gap 3 of regulating nut 1.Regulating nut 1 changes with respect to the axial position of valve gap 3 during rotation regulating nut 1, packing ring 2, the position of spacing shim 4 pads 5 valve rods 6 valve blocks 10 also changes with the variation of regulating nut 1 with respect to the axial position of valve gap 3, change the compress variation of stack of Belloville springs 7, the elastic force of stack of Belloville springs 7 is compared to the axial force of valve block 10 in valve pocket inner high voltage water and is determined the arc surface aperture of valve block and valve seat, determine the flow of overflow, determined the pressure of pressure regulator valve setting system.Regulating nut 1 stops the rotation when reaching the pressure of system requirements.
Working principle of the present utility model is: high pressure water enters body cavity from the high-pressure water inlet 16 on the valve body 15, and high pressure water exports 17 water outlets, and overflow water flow-off 18 connects the water that the high pressure water pressure regulator valve overflows.The active force that is axially made progress at the effect lower valve 10 of the pressure of the chamber of valve body 15 inner high voltage water, this active force overcomes the elastic force of stack of Belloville springs 7 and opens airtight valve seat 13 and the circular arc fitting surface of valve block 10, the hole of overflow water (namely depart from the declared working condition point, overflow unnecessary flow) by valve base cavity flows out to flow-off 18 values and runs in and put or get back to tank and recycle.This valve block 10 and valve seat 13 remained on certain unlatching distance when the elastic force that high pressure water acts on the axial force of valve block 10 and stack of Belloville springs 7 equated, kept balance.Pressure remains on a stationary value.When the elastic force of stack of Belloville springs 7 surpasses high pressure water and acts on axial force on the valve block 10, the fitting surface sealing of valve block 10 and valve seat 13.Flow-off 18 does not overflow flow, and this moment, system pressure reached maximum.When belleville spring was in the least amount of deformation that sets, the axial force that high pressure water acts on valve block 10 overcame the elastic force of stack of Belloville springs 7, and the fitting surface of valve block 10 and valve seat 13 is opened distance and reached maximum, and this moment, system pressure was minimum.The flow of flow-off is maximum.During height-adjusting system pressure, rotation regulating nut 1 makes regulating nut 1 axial bottom offset, and stack of Belloville springs 7 is compacted, elastic force increases, this elastic force overcomes the active force that axially makes progress that high pressure water acts on valve block 10, promotes valve block 10 to bottom offset, dwindles the distance of the fitting surface of valve block 10 and valve seat 13.The flow that overflows flow-off 18 system pressure that diminishes is raise.When the elastic force of stack of Belloville springs 7 and high pressure water act on valve block 10 the active force that axially makes progress when equating pressure remain on a stable numerical value.In the time of need to turning down system works pressure, opposite with said process.
Claims (8)
1. a high pressure water pressure regulator valve is comprised of regulating nut, packing ring, valve gap, spacing shim, pad, valve rod, stack of Belloville springs, spool, valve core seal ring, valve block, valve block seal ring, support ring, valve seat, valve seat insert and valve body; It is characterized in that: valve block, spool and valve seat are arranged in the valve body chamber, and the exterior arc surface of valve block and the inner arc surface of valve seat cooperate; Spool is fixed on valve inner by the screw-thread fit of valve gap and valve body; Valve block produces axial force upwards under the pressure-acting of high pressure water, overcome stack of Belloville springs elastic force under this power effect, makes valve block axial displacement in the spool cylindrical hole; Valve rod, stack of Belloville springs, pad are positioned at valve cover cavity, regulating nut and valve gap screw thread screw, follow overflow namely to depart from declared working condition in valve seat female cone post hole simultaneously by the pressure that the change regulating nut can be regulated high pressure water jet equipment with respect to the axial position of valve gap, overflow unnecessary flow.
2. high pressure water pressure regulator valve according to claim 1 is characterized in that: seal ring and support ring are housed in the valve block o-ring groove, and sealing circle, support ring and spool cylindrical hole surface engagement prevent that high pressure water from leaking into part in the valve cover cavity.
3. high pressure water pressure regulator valve according to claim 1 is characterized in that: in the valve core seal ring groove seal ring is housed, sealing circle and valve body cylindrical hole internal surface cooperate, and prevent that high pressure water from leaking into part in the valve cover cavity.
4. high pressure water pressure regulator valve according to claim 1 is characterized in that: in the valve seat insert groove seal ring is housed, sealing circle and valve body cylindrical hole internal surface cooperate, and prevent that high pressure water from leaking into high pressure water pressure regulator valve flow-off.
5. high pressure water pressure regulator valve according to claim 1 is characterized in that: valve block and valve seat arc surface cooperate airtight, prevent that high pressure water from leaking.
6. high pressure water pressure regulator valve according to claim 1, it is characterized in that: the valve seat endoporus is the circular cone columniation structure, prevents from assembling from the high pressure water pressure of valve seat endoporus overflow producing noise.
7. high pressure water pressure regulator valve according to claim 1 is characterized in that: the valve gap upper end face has two symmetrical rectangle grooves, and this rectangle groove can be discharged the gas in the valve cover cavity, checks whether the seal ring of high pressure water pressure regulator valve is normal, limits the stroke of spacing shim.
8. high pressure water pressure regulator valve according to claim 7 is characterized in that: the spacing shim excircle part has two to protrude rectangular blocks, and the rectangle groove of two symmetries of this rectangular block and valve gap cooperates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220330485 CN202884144U (en) | 2012-06-28 | 2012-06-28 | High pressure water pressure regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220330485 CN202884144U (en) | 2012-06-28 | 2012-06-28 | High pressure water pressure regulating valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202884144U true CN202884144U (en) | 2013-04-17 |
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ID=48075574
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220330485 Expired - Fee Related CN202884144U (en) | 2012-06-28 | 2012-06-28 | High pressure water pressure regulating valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202884144U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104019257A (en) * | 2014-06-05 | 2014-09-03 | 中国科学院等离子体物理研究所 | Novel vacuum decompression valve |
| CN108223833A (en) * | 2018-01-30 | 2018-06-29 | 浙江大农实业股份有限公司 | 150MPa super high pressure fluid pressure regulator valves |
| CN110778749A (en) * | 2019-11-13 | 2020-02-11 | 广东伟创科技开发有限公司 | Flow path selection valve applied to automatic online water quality monitoring |
-
2012
- 2012-06-28 CN CN 201220330485 patent/CN202884144U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104019257A (en) * | 2014-06-05 | 2014-09-03 | 中国科学院等离子体物理研究所 | Novel vacuum decompression valve |
| CN108223833A (en) * | 2018-01-30 | 2018-06-29 | 浙江大农实业股份有限公司 | 150MPa super high pressure fluid pressure regulator valves |
| CN108223833B (en) * | 2018-01-30 | 2023-12-29 | 浙江大农实业股份有限公司 | 150MPa ultrahigh pressure fluid pressure regulating valve |
| CN110778749A (en) * | 2019-11-13 | 2020-02-11 | 广东伟创科技开发有限公司 | Flow path selection valve applied to automatic online water quality monitoring |
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| GR01 | Patent grant | ||
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Addressee: Ruan Yun Document name: Notification to Pay the Fees |
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| DD01 | Delivery of document by public notice |
Addressee: Ruan Yun Document name: Notification of Termination of Patent Right |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130417 Termination date: 20140628 |
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| EXPY | Termination of patent right or utility model |