CN1447048A - Fluid speed regulating valve - Google Patents
Fluid speed regulating valve Download PDFInfo
- Publication number
- CN1447048A CN1447048A CN 03109484 CN03109484A CN1447048A CN 1447048 A CN1447048 A CN 1447048A CN 03109484 CN03109484 CN 03109484 CN 03109484 A CN03109484 A CN 03109484A CN 1447048 A CN1447048 A CN 1447048A
- Authority
- CN
- China
- Prior art keywords
- valve body
- fluid
- valve
- sealed
- transmission nut
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000012530 fluid Substances 0.000 title claims abstract description 40
- 230000001105 regulatory effect Effects 0.000 title abstract description 3
- 230000005540 biological transmission Effects 0.000 claims abstract description 52
- 238000007789 sealing Methods 0.000 claims abstract description 30
- 238000006073 displacement reaction Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 230000001276 controlling effect Effects 0.000 abstract description 3
- 238000002156 mixing Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000006978 adaptation Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 229910001339 C alloy Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
Images
Landscapes
- Electrically Driven Valve-Operating Means (AREA)
- Multiple-Way Valves (AREA)
Abstract
The invention relates to a fluid speed regulating valve, which comprises a valve body provided with a flow guide cavity, a transmission nut, a sealing core and two input connectors which are correspondingly positioned at the same axial line position at two ends of the valve body in pairs, wherein the sealing core comprises a transmission part screwed with the transmission nut, a sealing part positioned in the flow guide cavity and provided with parallel surfaces and a limiting part; the invention can control the opening of the flow channel by controlling the stepper motor to drive the transmission nut accurately by the computer, and can control the flow rate of the fluid accurately.
Description
Technical field
The present invention relates to a kind of control unit of fluid transmission, relate in particular to a kind of series flow control valve.
Background technique
The present common employing reduction valve of speed governing of fluid at home and abroad adds the principle design of throttle valve, a kind of series flow control valve is disclosed among the Chinese patent CN2031045U, form by throttling arrangement, decompressor and control cylinder body device, wherein throttling arrangement promotes adjustable lever by rotating adjusting handle, the throttling valve core is moved axially, change the aperture of throttle valve valve port, regulate required flow, thereby reach the purpose of control flows rate of flow of fluid.
The structure more complicated of this modulating valve also is difficult to the accurate control of realization to speed.Simultaneously because closed surface separately and under the applying two states is changing, thereby the impurity in the fluid enters closed surface easily, is not suitable for not controls of pure fluid such as oil gas water fluid-mixings.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of series flow control valve simple in structure that can be applied to the control of high-pressure impure net flow body.
In order to achieve the above object, the invention provides a kind of Fluid governor valve, comprise valve body, transmission nut, sealed core and paired input adapter, described valve body is provided with endoporus and input, output interface, this endoporus and input, output interface communicate the part sealed at both ends formation diversion cavity, the corresponding in twos same axial location that is positioned at described valve body two ends of described input interface, described sealed core comprises successively the transmission unit that is spirally connected with described transmission nut that connects, being arranged to have plane-parallel sealed department in the diversion cavity and cooperate with described valve body makes the sealed department can only be at axially movable limited part, described sealed department parallel surfaces is provided with the guiding gutter that is the inclined-plane up and down, described input adapter is individually fixed in the described input interface, it is axially perpendicular to described parallel plane and is provided with pod apertures, and it is positioned at and forms the plane driving fit between the end face of valve body and described parallel plane; The rotation transmission nut can drive described sealed core and move axially, and makes described pod apertures that relative displacement take place above guiding gutter.
In the such scheme, be characterized in that described input adapter is made up of pipe joint and sealing head, this pipe joint is fixed on the described input interface, and by a seal ring end face of sealing head is compressed and to fit on the described parallel plane.
In the such scheme, be characterized in that the material of described sealing head is pottery.
In the such scheme, be characterized in that described valve body also comprises a drive cavity, described transmission nut is placed in this drive cavity, inner and described transmission section is spirally connected, stretch out outside the valve body outer end, and its middle part radially is provided with a bulge loop, is respectively equipped with bearing in the cavity of these bulge loop both sides, also is fixed with a bearing cap on the drive cavity one side valve body end face.
In the such scheme, be characterized in that described transmission nut outer end is connected with the transmission shaft of a computer-controlled stepper motor, and described transmission nut is high-accuracy ball-screw nut, described transmission unit is one section high-accuracy ball screw.Since computer can be accurately digital control the rotating cycle of stepping motor rotation, drive transmission nut and rotate the corresponding number of turns, accurately control the shift length of sealed core, change the size of fluid passage upper shed area, change the flow of fluid, thereby reach the purpose of accurate control flows rate of flow of fluid.
In the such scheme, be characterized in being separately positioned between described sealed core sealed department and transmission unit, the limited part seal ring that seal ring is housed on convex that go out, the outer wall in footpath, with described valve body inner bore wall fitted seal.
In the such scheme, be characterized in that described limited part is the cylinder with seamed edge, this cylinder inserts in the hole of respective shapes on the valve body.
In the such scheme, described Fluid governor valve also comprises a discharge conection, is fixedly installed on the output interface of valve body.
The present invention is provided with two input adapters over against the position up and down at valve body, exerts pressure simultaneously from the upper and lower surface of sealed core, thereby can guarantee that sealed core can not come with certain sealing head disengaging.Behind the cut-in pressure pipeline, also can balanced seal core pressure, avoid deforming; Adopt RunddichtringO to transmit pressure between input pipe joint of the present invention and the sealing head, because the buffer function of seal ring, pressure is controlled easily, certain space also can be provided when part expands with heat and contract with cold and keep pressure to sealing head simultaneously.Driving fit plane between sealing head of the present invention and the sealed core is in the state of fitting tightly always, thereby the impurity in the fluid can not advance closed surface and influence adaptation, thereby can be applicable to the control to impure net flow rates of flow of fluid such as oil gas water fluid-mixings.Adopt the sealing means of seal ring can avoid between the hot environment lower body member taking place stuck phenomenon simultaneously because of expanding with heat and contract with cold.Because structural unique design, the present invention can be used for controlling the flow velocity of the various oil gas water fluid-mixings of High Temperature High Pressure, and Maximum operating temperature can reach 250 degree, and Maximum operating pressure can reach 140Mpa.
The present invention is not split up into decompressor and throttling arrangement in addition, and structure is simply more a lot of than traditional series flow control valve, is reduced to cost and requisite space greatly.
Description of drawings
Fig. 1 is the three-dimensional exploded view of embodiment of the invention series flow control valve
Fig. 2 is the sectional drawing of embodiment of the invention series flow control valve
Embodiment
As shown in Figure 1, the series flow control valve of the embodiment of the invention is made up of valve body 1, bearing cap 2, transmission nut 3, upper bearing (metal) 4, lower bearing 5, sealed core 6, out splice going splice 7, first input adapter 8 and second input adapter 9.Please refer to shown in Figure 2 simultaneously.
Valve body is the cylinder that the cross section is roughly rectangle, and inside has drive cavity 11, and the elongated hole 12 of the circular cross-section that communicates with this drive cavity of circular cross-section.Corresponding position offers the inlet opening 13,14 that communicates with this elongated hole 12 respectively about valve body, with a delivery outlet that communicates with elongated hole 15, on valve body one end face, also be provided with a spacing hole 16 of the rectangle that communicates with elongated hole, can certainly be designed to shapes such as triangle, pentagon.
Transmission nut 3 adopts high-accuracy ball-screw nut, it is a hollow circular tube, on its sidewall, have one at the bulge loop 31 that radially extends, pipe one end can insert the transmission shaft of stepper motor, and fix, thereby transmission nut 3 can be rotated under the driving of stepper motor by in the fixed hole 32 of side, being screwed into screw.On the inwall of the pipe the other end internal thread is arranged.
Sealed core 6 is made up of spacing section 61, seal section 62 and transmission section 63, be provided with first, second seal ring 64,65 that two diameters are slightly less than the elongated hole diameter between each section, all there is the groove 642,652 that " O " RunddichtringO 641,651 is installed at each seal ring middle part.Being positioned at front end for spacing section 61, is the cylinder of a rectangular cross-section, just inserts in the spacing hole 16 on the valve body 1, thereby sealed core 6 can't be rotated, and can only move in elongated hole 12.Seal section 62 is positioned at the middle part, it also is the cylinder of a rectangular cross-section, be provided with a guiding gutter 621 at the middle position of parallel surfaces up and down near the second seal ring place 65, these guiding gutter 621 axial cross sections can be referring to Fig. 2, its side near second seal ring 65 connects up and down fully, and opposite side is tapered to the second seal ring direction, all forms identical inclined-plane up and down, has also offered an auxilliary discharge orifice 6211 that auxiliary fluid flows out on the sidewall of guiding gutter 621 perforations one side simultaneously.Transmission section 63 is one section ball screw, and can guarantee that sealed core drives to issue in the transmission nut rotation after transmission nut 3 cooperates and give birth to axial precise displacement that error is very little, with the purpose of the accurate regulated fluid speed of final realization.On the sealed core above-mentioned three sections can one machine shaping, also can be by a plurality of independent sectors are formed by fixedly connecting.
During installation, sealed core 6 is inserted in valve body 1, its spacing section 61 spacing hole 16 from valve body 1 the other end stretched out, the seal section 62 of its rectangular cross-section is positioned at elongated hole 12, and and elongated hole 12 inwalls between leave the space that fluid flows.Two seal rings 64,65 lay respectively at the both sides of two inlet openings 13,14 and delivery outlet 15, with the path of fluid flow and other position is isolated comes, have just formed diversion cavity 121.Then upper and lower bearing housing 4,5 is placed bulge loop 31 both sides of transmission nut 3, put into drive cavity 11 together, upper and lower bulge loop 31 play guarantee transmission nut rotation concentricity and reduce it and valve body between the effect of sliding friction, rotation transmission nut 3 screws the transmission section 63 of itself and sealed core 6, and the bearing cap 2 that again middle part is provided with circular hole passes transmission nut 3 and is fixed on the valve body 1.At this moment because spacing section 61 effect during transmission nut 3 rotations, can only drive sealed core 6 and move axially in diversion cavity 121, the distance that moves is directly proportional with the number of turns of rotation.After being fixed to the transmission shaft of stepper motor on the transmission nut 3 like this,, just can accurately control the distance of sealed core 6 displacements by the rotating cycle of the accurate control step motor of computer.
Out splice going splice 7 is a pipe joint, is bolted in the delivery outlet 15, and by " O " RunddichtringO realizes the sealing between valve body 1 and joint 7 outer walls.
First, second input adapter 8,9 is made up of sealing head 81,91 and pipe joint 82,92 two-part; sealing head 81,91 is for being axially arranged with the cylindrical body of pod apertures 811,911; adopt expansion system material little, that the surface friction system is little to make; as copper; preferably ceramic; the surface that it is contacted with sealed core 6 and the upper and lower surface of sealed core 6 are processed very smoothly; to realize good plane sealing between the two; protect the middle part of sealing head 81,91 outer walls to be provided with " O " RunddichtringO 812,912, with the gap between isolated and inlet opening 13,14 sidewalls always.The front end sleeve of pipe joint 82,92 is equipped with one " O " RunddichtringO, and 13,14 of inlet openings are fixing by being spirally connected.
After sealing head 81,91 is filled in, the spinning in pipe joint 82,92 gradually, by " O " RunddichtringO compresses sealing head 81,91, why adopt " O " RunddichtringO to transmit pressure, be because sealing head promptly will be subjected to bigger pressure, make the mating face of it and sealed core have good adaptation, in case the seepage of fluid stopping body, again can not be because of pressure cause mechanically deformation too greatly, make between it and the sealed core and can not produce relative displacement.If adopt the structure of integral type, strength is difficult to control, when occurring simultaneously expanding with heat and contract with cold phenomenon, can situation stuck or that get loose occur because of the difference of expansion coefficient between sealed core and the sealing head.And add " O " behind the RunddichtringO, because " O " buffer function of RunddichtringO, pressure is controlled easily, certain space also can be provided when part expands with heat and contract with cold and keep pressure to sealing head simultaneously.
And over against the position two input adapters 8,9 are set about in the of 1 at valve body, be to exert pressure simultaneously from the upper and lower end of sealed core 6, thereby can guarantee that sealed core 6 can not come with certain sealing head disengaging by two sealing heads 81,91.Behind the cut-in pressure pipeline, also can balanced seal core 6 pressures, avoid deforming, thereby make the present invention can be used for the very high occasion of pressure.
Suppose that series flow control valve works in cut-off state at the beginning, sealed core 6 is in the position of low order end, and this moment, the upper and lower surface of 811,911 sealed sections 62 of upper-lower seal 81,91 pod apertures blocked, and fluid can't enter diversion cavity 121.Rotate by the computer control stepping motor, driving transmission nut 2 rotates, and then sealed core 5 is moved to left, conducting between pod apertures 811,911 and the guiding gutter 621, because guiding gutter 621 left sides are the inclined-plane up and down, control guiding gutter 621 dextrosinistral displacement distances, the opening of the fluid passage that forms between pod apertures 811,911 and the guiding gutter 621 clocklike changes from small to large, fluid enters guiding gutter 621 inside from this opening, auxilliary discharge orifice 6211 from guiding gutter 621 and side thereof flows into diversion cavity 121 again, flows out from out splice going splice 7 at last.Because computer is the rotating cycle of control step motor rotation accurately, cooperating of high-accuracy ball screw by high-accuracy ball screw transmission nut and sealed core transmission section, just can control the position of sealed core exactly, thereby accurately control the size of opening area, change the flow of fluid, reach the purpose of accurate control flows rate of flow of fluid.
Different with common modulating valve is, the present invention regulates flow velocity by the aperture size that changes between spool and the valve pocket, but be provided with on sealed core is up and down the guiding gutter on inclined-plane, change the aperture of runner by the axial relative displacement between pod apertures and the guiding gutter on the change sealing head, driving fit plane between sealing head and the sealed core is in the state of fitting tightly always, thereby the impurity in the fluid can not advance closed surface and influence adaptation, thereby the present invention can be applicable to the control to impure net flow rates of flow of fluid such as oil gas water fluid-mixings.
The present invention is applied to the occasion of hydraulic fluid, because the unique design on the said structure, can be used for controlling the flow velocity of the various oil gas water fluid-mixings of High Temperature High Pressure, and Maximum operating temperature can reach 250 degree, and Maximum operating pressure can reach 140Mpa.Cartridge valve of the present invention can adopt the carbon alloy material to make.
When the fluid input output directly communicate with the body upper runner rather than are connected by the pipe joint pattern, can directly on valve body, offer delivery outlet and replace out splice going splice, the while seals with seal ring between valve body and body.The quantity of out splice going splice can be provided with as required.
Input adapter then will keep sealing head, and guarantees to apply certain pressure simultaneously in the upper and lower surface of sealed core, thereby pipe joint can change other into and is installed in the element of on the valve body sealing head being exerted pressure.The quantity of input adapter also is restricted, can be arranged to over against two or four, when adopting four input adapters, guiding gutter should be set up two openings in the surface about the sealed core seal section, still be designed to the longitudinal section of taper.The position that the while guiding gutter is offered needn't be limited near seal ring, but will determine according to the position of input adapter.
To the less demanding occasion of control automaticity, go back the mode of available adjustment handwheel and rotate transmission nut, promptly substitute stepper motor with manual mode, rotate the purpose that the number of turns can reach accurate speed governing equally by setting.
Transmission nut of the present invention also can be located at outside the valve body, directly be placed on and expose sealed core and expose the outer transmission section of valve body, manual or electronic rotation transmission nut, can finish speed-regulating function of the present invention equally, at this moment just drive cavity need be set in valve body, simultaneously do not need upper and lower bearing and bearing cap yet, and can limit the stroke of sealed core by the end cap on seal ring and the valve body.
In addition, three sections integrally formed in the present invention processing on the sealed core, but also can constitute by the assembling of several parts, therefore the equivalent variations of being done on basis of the present invention all should be included within the protection domain of claim.
Claims (10)
1, a kind of Fluid governor valve, comprise valve body, transmission nut, sealed core and paired input adapter, described valve body is provided with endoporus and input, output interface, this endoporus and input, output interface communicate the part sealed at both ends formation diversion cavity, the corresponding in twos same axial location that is positioned at described valve body two ends of described input interface, described sealed core comprises successively the transmission unit that is spirally connected with described transmission nut that connects, be arranged at the sealed department that has parallel surfaces in the diversion cavity, and cooperate with described valve body and to make the sealed department can only be at axially movable limited part, offer the guiding gutter that is the inclined-plane up and down on the described sealed department parallel surfaces, described input adapter is individually fixed in the described input interface, it is axially perpendicular to described parallel plane and is provided with pod apertures, and it is positioned at and forms the plane driving fit between the end face of valve body and described parallel plane;
The rotation transmission nut can drive described sealed core and move axially, and makes described pod apertures that relative displacement take place above guiding gutter.
2, Fluid governor valve as claimed in claim 1, it is characterized in that, described input adapter is made up of pipe joint and sealing head, and this pipe joint is fixed on the described input interface, and by a seal ring end face of sealing head is compressed and to fit on the described parallel plane.
3, Fluid governor valve as claimed in claim 2 is characterized in that, the material of described sealing head is a pottery.
4, Fluid governor valve as claimed in claim 1, it is characterized in that, described valve body also comprises a drive cavity, described transmission nut is placed in this drive cavity, inner and described transmission section is spirally connected, and stretch out outside the valve body outer end, and its middle part radially is provided with a bulge loop, in the cavity of these bulge loop both sides, be respectively equipped with bearing, also be fixed with a bearing cap on the drive cavity one side valve body end face.
5, Fluid governor valve as claimed in claim 1 or 2 is characterized in that, described transmission nut is high-accuracy ball-screw nut, and described transmission unit is one section high-accuracy ball screw.
6, as claim 1,2,3 or 4 described Fluid governor valves, it is characterized in that, be respectively arranged with diametrically the seal ring that protrudes, seal ring is housed on the outer wall between described sealed core sealed department and transmission unit, the limited part, with described valve body inner bore wall fitted seal.
7, Fluid governor valve as claimed in claim 5 is characterized in that, is respectively arranged with diametrically the seal ring that protrudes, seal ring is housed on the outer wall between described sealed core sealed department and transmission unit, the limited part, with described valve body inner bore wall fitted seal.
As claim 1,2,3 or 4 described Fluid governor valves, it is characterized in that 8, described limited part is the cylinder with seamed edge, this cylinder inserts in the hole of respective shapes on the valve body.
9, Fluid governor valve as claimed in claim 1 is characterized in that, also comprises a discharge conection, is fixedly installed on the output interface of valve body.
10, Fluid governor valve as claimed in claim 5 is characterized in that, the outer end of described transmission nut is connected with the transmission shaft of a computer-controlled stepper motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03109484 CN1223778C (en) | 2003-04-10 | 2003-04-10 | Fluid speed regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03109484 CN1223778C (en) | 2003-04-10 | 2003-04-10 | Fluid speed regulating valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1447048A true CN1447048A (en) | 2003-10-08 |
| CN1223778C CN1223778C (en) | 2005-10-19 |
Family
ID=28050258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03109484 Expired - Fee Related CN1223778C (en) | 2003-04-10 | 2003-04-10 | Fluid speed regulating valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1223778C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101349148B (en) * | 2008-08-13 | 2011-11-23 | 中国海洋石油总公司 | Double-feedback fluid-control one-way throttle velocity modulation composite valve |
| CN103016770A (en) * | 2012-12-08 | 2013-04-03 | 中国航天科技集团公司第六研究院第十一研究所 | Cutter type isolating valve for maintaining open state of cutter based on medium pressure |
| CN111853308A (en) * | 2020-07-02 | 2020-10-30 | 中国舰船研究设计中心 | Blow-off valve with pressure feedback control |
-
2003
- 2003-04-10 CN CN 03109484 patent/CN1223778C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101349148B (en) * | 2008-08-13 | 2011-11-23 | 中国海洋石油总公司 | Double-feedback fluid-control one-way throttle velocity modulation composite valve |
| CN103016770A (en) * | 2012-12-08 | 2013-04-03 | 中国航天科技集团公司第六研究院第十一研究所 | Cutter type isolating valve for maintaining open state of cutter based on medium pressure |
| CN103016770B (en) * | 2012-12-08 | 2015-05-20 | 中国航天科技集团公司第六研究院第十一研究所 | Cutter type isolating valve for maintaining open state of cutter based on medium pressure |
| CN111853308A (en) * | 2020-07-02 | 2020-10-30 | 中国舰船研究设计中心 | Blow-off valve with pressure feedback control |
| CN111853308B (en) * | 2020-07-02 | 2022-02-18 | 中国舰船研究设计中心 | Blow-off valve with pressure feedback control |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1223778C (en) | 2005-10-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101910694B (en) | Pressure control valve device | |
| EP1197692B1 (en) | Proportional pilot-operated directional valve | |
| CN201763711U (en) | Hydraulic proportional control valve | |
| US20050224737A1 (en) | Hybrid flow metering valve | |
| CN104514890A (en) | Novel throttle valve | |
| CN107407264A (en) | Torque control system for variable delivery pump | |
| CN1223778C (en) | Fluid speed regulating valve | |
| CN201688006U (en) | High precision electric control valve | |
| CN113503364B (en) | Throttling cone flow adjusting device | |
| CN2643091Y (en) | Fluid speed regulating valve | |
| CN108533763B (en) | Stop valve with controllable opening and closing speed | |
| CN108361404B (en) | A kind of Remote Hydraulic control septum valve | |
| JPS61252970A (en) | Valve | |
| CN214367942U (en) | Large-drift-diameter servo water pressure throttling reversing valve | |
| CN115898703A (en) | Cavitation pipe capable of adjusting flow area and flow area adjusting method thereof | |
| CN114658883A (en) | Servo motor driven digital reversing valve | |
| CN208719482U (en) | A kind of direct acting stacked compression release valve | |
| CN2086833U (en) | Digital flow regulating valve | |
| CN1375048A (en) | Insert valve for sectional radiator | |
| CN113606222A (en) | Test device of reversing valve and working method thereof | |
| US20100071789A1 (en) | Device For Controlling A Fluid Flow | |
| CN219013387U (en) | Angle type stop valve capable of adjusting flow | |
| CN217107648U (en) | Proportional flow valve | |
| CN216975374U (en) | Overflow pressure adjusting device of direct-acting overflow valve and direct-acting overflow valve | |
| CN103046898B (en) | Novel valve needle of pressure control drilling throttle valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: COSL Chemicals (Tianjin) Co., Ltd. Assignor: China Oilfield Services Limited Contract fulfillment period: 2008.2.1 to 2023.1.1 contract change Contract record no.: 2008990000062 Denomination of invention: Fluid speed control valve Granted publication date: 20051019 License type: General permission Record date: 2008.4.7 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: COMMON LICENCE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.2.1 TO 2023.1.1 Name of requester: TIANJIN COSL CHEMICAL CO., LTD. Effective date: 20080407 |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20051019 Termination date: 20160410 |