CN104791506A - Throttling valve - Google Patents
Throttling valve Download PDFInfo
- Publication number
- CN104791506A CN104791506A CN201510209949.7A CN201510209949A CN104791506A CN 104791506 A CN104791506 A CN 104791506A CN 201510209949 A CN201510209949 A CN 201510209949A CN 104791506 A CN104791506 A CN 104791506A
- Authority
- CN
- China
- Prior art keywords
- described valve
- valve
- valve body
- valve plate
- worm
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/04—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with pivoted closure members
- F16K3/06—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with pivoted closure members in the form of closure plates arranged between supply and discharge passages
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
- F16K3/314—Forms or constructions of slides; Attachment of the slide to the spindle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/53—Mechanical actuating means with toothed gearing
- F16K31/535—Mechanical actuating means with toothed gearing for rotating valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0008—Mechanical means
- F16K37/0016—Mechanical means having a graduated scale
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Abstract
The invention relates to a throttling valve which comprises a valve body, a valve plate and a valve rod. The valve plate and the valve rod are installed on the valve body, the valve body is provided with first throttling holes, and the valve plate is provided with second throttling holes. Worm wheel teeth are arranged on the edge of the valve plate, and worm teeth matched with the worm wheel teeth are arranged on the valve rod. The worm wheel teeth are meshed with the worm teeth, and thus the worm wheel and worm transmission connection is achieved on the valve plate and the valve rod. The second throttling holes in the valve plate can be correspondingly staggered or communicated with the first throttling holes in the valve body under the transmission of the valve rod to the valve plate. According to the throttling valve, the fluid flowing area can be conveniently adjusted, a flange of a pipeline does not need to be demounted or mounted in the adjusting process, and thus the phenomenon of outer leakage of fluid in the prior art can be avoided.
Description
Technical field
The invention belongs to valve field on pipeline, be specifically related to a kind of throttle valve that can be used for controlling fluid flow area.
Background technique
Boats and ships are often greater than the diameter of pipeline for the length of the modulating valve regulated piping flow, take more space, and manufacture cost is higher, if therefore just in order to the use of first piping flow debugging, generally can not adjustment in use valve, but select restricting orifice to substitute.Restricting orifice is generally made up of monolithic or two panels sheet metal, is interposed in the middle of two panels pipeline flange during use.Wherein, the restricting orifice of single piece of sheet metal composition is uncontrollable, and need to select suitable restricting orifice by constantly debugging, therefore need constantly dismounting flange, process bothers very much.The restricting orifice of two panels sheet metal composition can regulate circulation area, but still needing to dismantle flange can regulate, and therefore regulates to get up to bother equally very much; In addition, because the fluid in pipeline has certain pressure, once flange unclamps, fluid just can leak.So there is various defect equally in the restricting orifice of two panels sheet metal composition.
Summary of the invention
The object of the invention is to, provide a kind of easy to adjust and the throttle valve of fluid leakage can not be caused.
A kind of throttle valve that the present invention proposes, comprises valve body, valve plate and valve rod; Described valve plate and valve rod are installed on described valve body, and described valve body is provided with first segment discharge orifice, and described valve plate is provided with second section discharge orifice; The edge of described valve plate is provided with worm-gear tooth, and described valve rod is provided with the worm tooth with described worm-gear tooth adaptation; Described worm-gear tooth engages with described worm tooth, makes described valve plate and described valve rod form Worm Wheel System and is connected; At described valve rod under the transmission of described valve plate, the second section discharge orifice on described valve plate correspondingly to the first segment discharge orifice on described valve body can stagger or be communicated with.
Concrete, described valve body is provided with groove, and described valve plate adaptation is arranged in described groove.
Concrete, described valve body is provided with cylindrical hole; Side relative with described valve plate on described cylindrical hole is provided with breach; Described valve rod adaptation is arranged in described cylindrical hole; The worm-gear tooth of described valve plate is engaged with the worm tooth of described valve rod by described breach.
Preferably, the depth direction of described cylindrical hole is consistent with the radial direction of described valve body.
Preferably, described worm tooth is located at the lower end of described valve rod relatively, and the upper end of described valve rod exceeds the upper-end surface of described cylindrical hole; Also be arranged with sealing nut in the upper end of described valve rod, the upper-end surface of described cylindrical hole seals by described sealing nut.
Preferably, described throttle valve also comprises indicator of opening and graduator, and described indicator of opening is fixed on the upper end of described valve rod, and described graduator is fixed on described valve body; Described indicator of opening according to the corresponding instruction of the transmission of described valve rod on the position that described graduator is corresponding.
Preferably, the shape of the shape of described first segment discharge orifice and aperture and second section discharge orifice and aperture corresponding consistent; Described valve body is circular valve, and described valve plate is circular valve plate.
Preferably, also comprise valve gap, described valve gap is provided with center hole; Described valve gap lid is located on described valve body; Described valve plate is located between described valve body and valve gap.
Preferably, pad between described valve gap and described valve plate and be provided with rubber ring; Pad between described valve gap and described valve body and be provided with gasket seal.
Preferably, described valve body is provided with the first flange connecting hole away from the end face of described valve gap relatively, and described valve gap is provided with the second flange connecting hole away from the end face of described valve body relatively.
Beneficial effect: the throttle valve that the present invention proposes, rotates described valve rod during use, by valve plate described in described valve rod transmission, thus control that second section discharge orifice on described valve plate is corresponding to the first segment discharge orifice on described valve body to be staggered or be communicated with; When the second section discharge orifice on described valve plate and the first segment discharge orifice on described valve body stagger, fluid cannot from throttle valve by or flow limited, and when the second section discharge orifice on described valve plate is communicated with the first segment discharge orifice on described valve body, fluid just can pass through from throttle valve.Therefore, the present invention can realize the adjustment of convection cell circulation area (flow) easily, and does not need the flange of disassembling pipe when regulating, and thus can not cause fluid leakage as prior art.
In addition, be connected because valve plate in the present invention and valve rod form Worm Wheel System, it has the feature of self-locking, makes valve plate can not change circulation area owing to being subject to the impact of fluid, therefore has the advantages such as stable, reliable.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of a kind of throttle valve embodiment that the present invention proposes.
Fig. 2 be Fig. 1 overlook cut away view.
Fig. 3 is the main TV structure schematic diagram of valve body in a kind of throttle valve embodiment of proposing of the present invention.
Fig. 4 be Fig. 3 overlook cut away view.
Fig. 5 is the structural representation of valve plate in a kind of throttle valve embodiment of proposing of the present invention.
Fig. 6 is the structural representation of valve rod in a kind of throttle valve embodiment of proposing of the present invention.
Fig. 7 is the structural representation of valve gap in a kind of throttle valve embodiment of proposing of the present invention.
Fig. 8 be Fig. 7 overlook cut away view.
In figure: 10-valve body, 11-first segment discharge orifice, 12-groove, 13-cylindrical hole, 20-valve plate, 21-second section discharge orifice, 22-worm-gear tooth, 30-valve rod, 32-worm tooth, 33-sealing nut, 41-aperture instruction nut, 42-calibrated scale, 50-valve gap, 51-center hole, 60-rubber ring, 70-gasket seal, 81-first flange connecting hole, 82-second flange connecting hole.
Embodiment
For the ease of it will be appreciated by those skilled in the art that the present invention is described further below in conjunction with accompanying drawing and embodiment.
A kind of throttle valve embodiment that the present invention proposes refers to Fig. 1 to Fig. 6, and it comprises valve body 10, valve plate 20 and valve rod 30; Described valve plate 20 and valve rod 30 are installed on described valve body 10, and described valve body 10 is provided with first segment discharge orifice 11 (consulting Fig. 3), and described valve plate 20 is provided with second section discharge orifice 21 (consulting Fig. 5); The edge of described valve plate 20 is provided with worm-gear tooth 22, and described valve rod 30 is provided with the worm tooth 32 (consulting Fig. 6) with described worm-gear tooth 22 adaptation; Described worm-gear tooth 22 engages (please continue to refer to Fig. 1) with described worm tooth 32, makes described valve plate 20 form Worm Wheel System with described valve rod 30 and is connected; At described valve rod 30 under the transmission of described valve plate 20, the second section discharge orifice 21 on described valve plate 20 correspondingly to the first segment discharge orifice 11 on described valve body 10 can stagger or be communicated with.
In the present embodiment, during use, rotate described valve rod 10, by valve plate 20 described in the transmission of described valve rod 10, thus control that second section discharge orifice 21 on described valve plate 20 is corresponding to the first segment discharge orifice 11 on described valve body 10 to be staggered or be communicated with; When the second section discharge orifice 21 on described valve plate 20 staggers with the first segment discharge orifice 11 on described valve body 10, fluid cannot from throttle valve by or flow limited, and when the second section discharge orifice 21 on described valve plate 20 is communicated with the first segment discharge orifice 11 on described valve body, fluid just can pass through from throttle valve.
In order to realize the object of the present embodiment better, below the present embodiment being done and optimize further or specialize design.
In the specific design scheme of the present embodiment, described valve body 10 is provided with groove 12 (consulting Fig. 4), and described valve plate 20 adaptation is arranged in described groove 12.
In the further specific design scheme of the present embodiment, described valve body 10 is provided with cylindrical hole 13 (consulting Fig. 3 or Fig. 4); Side relative with described valve plate 20 on described cylindrical hole 13 is provided with breach; Please continue to refer to Fig. 1 and Fig. 2, described valve rod 30 adaptation is arranged in described cylindrical hole 13; The worm-gear tooth 22 of described valve plate 20 is engaged by the worm tooth 32 of described breach with described valve rod 30.
In the present embodiment, the depth direction of described cylindrical hole 13 is preferably consistent with the radial direction of described valve body 10.
Described worm tooth 32 is located at the lower end of described valve rod 30 relatively, and the upper end of described valve rod 30 exceeds the upper-end surface of described cylindrical hole 13; Meanwhile, in order to prevent fluid leakage further, be also arranged with sealing nut 33 in the upper end of described valve rod 30, the upper-end surface of described cylindrical hole 13 seals by described sealing nut 33.
In the preferred version of the present embodiment, also can comprise indicator of opening and graduator, refer to Fig. 1, described indicator of opening is fixed on the upper end of described valve rod 30, and described graduator is fixed on described valve body 10; Described indicator of opening according to the corresponding instruction of transmission of described valve rod 10 on the position that described graduator is corresponding.Indicator of opening described in the present embodiment specifically can refer to the instruction of aperture shown in Fig. 1 nut 41, and described graduator specifically can refer to calibrated scale 42 shown in Fig. 1.Certainly, (aperture instruction) nut and calibrated scale is selected to be only that the present embodiment also can arrange indicator of opening and the graduator of other structures, does not do particular determination here from being convenient to realization, cost lower equal angles consideration.
Further, the shape of described first segment discharge orifice 11 and aperture preferably with the shape of second section discharge orifice 21 and aperture corresponding consistent; Certainly, though both slightly difference also can realize the object of the present embodiment.
In addition, because the present embodiment needs to use in pipeline, therefore described valve body 10 is preferably circular valve, and described valve plate 20 is preferably circular valve plate.
The present embodiment also can comprise valve gap 50 further, refers to Fig. 2, Fig. 7 and Fig. 8, and described valve gap 50 is provided with center hole 51; Described valve gap 50 lid is located on described valve body 10; Described valve plate 20 is located between described valve body 10 and valve gap 50.Arranging described valve gap 50 is to make described valve plate 2 more firmly spacing in described valve body 10 (groove 12).
Meanwhile, pay somebody's debt and expect repayment later between described valve gap 50 and described valve plate 20 and can be provided with rubber ring 60; Pay somebody's debt and expect repayment later between described valve gap 50 and described valve body 10 and can be provided with gasket seal 70, to improve the sealing of throttle valve further.
For the ease of installing in pipeline, valve body 10 described in the present embodiment also can arrange the first flange connecting hole 81 further away from the end face of described valve gap 50 relatively, and described valve gap 50 also can arrange the second flange connecting hole 82 further away from the end face of described valve body 10 relatively.Described first flange connecting hole 81 and the second flange connecting hole 82 with the Flange joint in pipeline, can improve the sealing of whole throttle valve in pipeline further.
The present embodiment can realize the adjustment of convection cell circulation area easily, and does not need the flange of disassembling pipe when regulating, and thus can not cause fluid leakage as prior art.In addition, be connected because valve plate in the present embodiment and valve rod form Worm Wheel System, it has the feature of self-locking, makes valve plate can not change circulation area owing to being subject to the impact of fluid, therefore has the advantages such as stable, reliable.
The above embodiment only have expressed several mode of execution of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a throttle valve, comprises valve body, valve plate and valve rod; Described valve plate and valve rod are installed on described valve body, and described valve body is provided with first segment discharge orifice, and described valve plate is provided with second section discharge orifice; It is characterized in that, the edge of described valve plate is provided with worm-gear tooth, and described valve rod is provided with the worm tooth with described worm-gear tooth adaptation; Described worm-gear tooth engages with described worm tooth, makes described valve plate and described valve rod form Worm Wheel System and is connected; At described valve rod under the transmission of described valve plate, the second section discharge orifice on described valve plate correspondingly to the first segment discharge orifice on described valve body can stagger or be communicated with.
2. throttle valve according to claim 1, is characterized in that, described valve body is provided with groove, and described valve plate adaptation is arranged in described groove.
3. throttle valve according to claim 2, is characterized in that, described valve body is provided with cylindrical hole; Side relative with described valve plate on described cylindrical hole is provided with breach; Described valve rod adaptation is arranged in described cylindrical hole; The worm-gear tooth of described valve plate is engaged with the worm tooth of described valve rod by described breach.
4. throttle valve according to claim 3, is characterized in that, the depth direction of described cylindrical hole is consistent with the radial direction of described valve body.
5. throttle valve according to claim 4, is characterized in that, described worm tooth is located at the lower end of described valve rod relatively, and the upper end of described valve rod exceeds the upper-end surface of described cylindrical hole; Also be arranged with sealing nut in the upper end of described valve rod, the upper-end surface of described cylindrical hole seals by described sealing nut.
6. throttle valve according to claim 5, is characterized in that, also comprises indicator of opening and graduator, and described indicator of opening is fixed on the upper end of described valve rod, and described graduator is fixed on described valve body; Described indicator of opening according to the corresponding instruction of the transmission of described valve rod on the position that described graduator is corresponding.
7. according to the arbitrary described throttle valve of claim 1 to 6, it is characterized in that, shape and the aperture of the shape of described first segment discharge orifice and aperture and second section discharge orifice are corresponding consistent; Described valve body is circular valve, and described valve plate is circular valve plate.
8. throttle valve according to claim 7, is characterized in that, also comprises valve gap, and described valve gap is provided with center hole; Described valve gap lid is located on described valve body; Described valve plate is located between described valve body and valve gap.
9. throttle valve according to claim 8, is characterized in that, pads and be provided with rubber ring between described valve gap and described valve plate; Pad between described valve gap and described valve body and be provided with gasket seal.
10. throttle valve according to claim 8, is characterized in that, described valve body is provided with the first flange connecting hole away from the end face of described valve gap relatively, and described valve gap is provided with the second flange connecting hole away from the end face of described valve body relatively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510209949.7A CN104791506A (en) | 2015-04-28 | 2015-04-28 | Throttling valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510209949.7A CN104791506A (en) | 2015-04-28 | 2015-04-28 | Throttling valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104791506A true CN104791506A (en) | 2015-07-22 |
Family
ID=53556551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510209949.7A Pending CN104791506A (en) | 2015-04-28 | 2015-04-28 | Throttling valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104791506A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105920763A (en) * | 2016-06-13 | 2016-09-07 | 西安新竹防灾救生设备有限公司 | Variable-diameter type pore plate device |
| CN106949277A (en) * | 2017-05-04 | 2017-07-14 | 贵州煤层气能源开发有限公司 | A kind of fracturing fluid recovery (backflow) motor valve |
| CN107477202A (en) * | 2017-10-16 | 2017-12-15 | 吴忠仪表有限责任公司 | Axial-flow type rotating regulation valve |
| CN111661813A (en) * | 2020-06-11 | 2020-09-15 | 宁波渤川废液处置有限公司 | Ferrous chloride conveying device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3821351A1 (en) * | 1988-06-24 | 1989-12-28 | Latoschinski Heinz Juergen | Valve |
| CN2396245Y (en) * | 1999-11-12 | 2000-09-13 | 肖业明 | Fluid controlling valve |
| CN1548794A (en) * | 2003-05-18 | 2004-11-24 | 王洪生 | Spinning stop valve |
| CN2683954Y (en) * | 2004-03-13 | 2005-03-09 | 曾杰武 | Spiral slice valve |
| CN2702134Y (en) * | 2004-04-21 | 2005-05-25 | 曾杰武 | Slice rotating valve |
| CN203309160U (en) * | 2013-05-13 | 2013-11-27 | 上海冠龙阀门机械有限公司 | Worm wheel valve |
-
2015
- 2015-04-28 CN CN201510209949.7A patent/CN104791506A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3821351A1 (en) * | 1988-06-24 | 1989-12-28 | Latoschinski Heinz Juergen | Valve |
| CN2396245Y (en) * | 1999-11-12 | 2000-09-13 | 肖业明 | Fluid controlling valve |
| CN1548794A (en) * | 2003-05-18 | 2004-11-24 | 王洪生 | Spinning stop valve |
| CN2683954Y (en) * | 2004-03-13 | 2005-03-09 | 曾杰武 | Spiral slice valve |
| CN2702134Y (en) * | 2004-04-21 | 2005-05-25 | 曾杰武 | Slice rotating valve |
| CN203309160U (en) * | 2013-05-13 | 2013-11-27 | 上海冠龙阀门机械有限公司 | Worm wheel valve |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105920763A (en) * | 2016-06-13 | 2016-09-07 | 西安新竹防灾救生设备有限公司 | Variable-diameter type pore plate device |
| CN105920763B (en) * | 2016-06-13 | 2021-10-08 | 西安新竹防灾救生设备有限公司 | Variable-drift-diameter type orifice plate device |
| CN106949277A (en) * | 2017-05-04 | 2017-07-14 | 贵州煤层气能源开发有限公司 | A kind of fracturing fluid recovery (backflow) motor valve |
| CN106949277B (en) * | 2017-05-04 | 2022-12-16 | 贵州煤层气能源开发有限公司 | Automatic regulating valve for flow of return fracturing fluid |
| CN107477202A (en) * | 2017-10-16 | 2017-12-15 | 吴忠仪表有限责任公司 | Axial-flow type rotating regulation valve |
| CN111661813A (en) * | 2020-06-11 | 2020-09-15 | 宁波渤川废液处置有限公司 | Ferrous chloride conveying device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104791506A (en) | Throttling valve | |
| US20100200784A1 (en) | Bellowphragm actuated fluid control swing valve | |
| AU2015371217B2 (en) | Dual check backflow preventer | |
| CA2901751C (en) | Main valve with internal rigid structure | |
| CN104315164B (en) | There is the stop valve of several functions | |
| US3130742A (en) | Combined safety relief valve and conduit | |
| CN208634574U (en) | A pull-type inner support flange seat | |
| CN113007186A (en) | Flange plate with adjustable internal structure | |
| CN103591375A (en) | Externally-arranged multipurpose silencer | |
| KR20140055560A (en) | Rotation type multi hole orifice | |
| CN204493818U (en) | A kind of can the valve of pilot line pressure | |
| US9625054B2 (en) | Shut-off flap | |
| KR200460266Y1 (en) | A Railway car air valve | |
| CN204358324U (en) | Based on the flexible expansion joint controlling excessive deformation mechanism | |
| CN211010298U (en) | Sealing device for valve connection | |
| CN210423750U (en) | Butterfly valve that leakproofness is strong | |
| CN207437850U (en) | Double-disc type metal sealing check valve | |
| CN207229929U (en) | A kind of wall-through connecting pipe structure of building water supply and drainage | |
| CN201844081U (en) | Pipeline overflow valve | |
| US20120285570A1 (en) | Pipe joint capable of absorbing water hammer shock | |
| CN203730783U (en) | Adjustable butterfly valve | |
| CN214889085U (en) | Angle type backflow preventing valve | |
| CN221054314U (en) | Stainless steel seal assembly of regulating valve | |
| CN206320348U (en) | A kind of duplex seat angle valve | |
| CN210003831U (en) | butterfly valve with filtering function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150722 |