CN106885015A - A kind of closed switching valve of wide tee - Google Patents

A kind of closed switching valve of wide tee Download PDF

Info

Publication number
CN106885015A
CN106885015A CN201710270503.4A CN201710270503A CN106885015A CN 106885015 A CN106885015 A CN 106885015A CN 201710270503 A CN201710270503 A CN 201710270503A CN 106885015 A CN106885015 A CN 106885015A
Authority
CN
China
Prior art keywords
valve
rotary shaft
blade
active rotation
driven rotary
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
Application number
CN201710270503.4A
Other languages
Chinese (zh)
Other versions
CN106885015B (en
Inventor
郭海锋
周益斌
赵文泉
杨明浩
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
To & Environment Technology (jiangsu) Co Ltd
Original Assignee
To & Environment Technology (jiangsu) Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by To & Environment Technology (jiangsu) Co Ltd filed Critical To & Environment Technology (jiangsu) Co Ltd
Priority to CN201710270503.4A priority Critical patent/CN106885015B/en
Publication of CN106885015A publication Critical patent/CN106885015A/en
Application granted granted Critical
Publication of CN106885015B publication Critical patent/CN106885015B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/10Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
    • F16K11/14Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by one actuating member, e.g. a handle
    • F16K11/18Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by one actuating member, e.g. a handle with separate operating movements for separate closure members
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/10Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
    • F16K11/105Three-way check or safety valves with two or more closure members

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Multiple-Way Valves (AREA)

Abstract

The invention discloses a kind of closed switching valve of wide tee, it includes valve body and the valve member coordinated with valve body, and valve member is arranged at valve inner air-flow openings, and valve member includes:As the active rotation axle of valve member drive shaft, two driven rotary shafts being rotated by active rotation axle, the blade being separately positioned on active rotation axle and driven rotary shaft, active rotation axle is set with driven rotary shaft in inverted triangle machine, connected by the bar that links between active rotation axle and driven rotary shaft, active rotation axle drives driven rotary shaft to rotate by the bar that links;Valve inner is provided with band, and band is arranged at valve inner air-flow openings, and band coordinates with blade shape, the gap between band sealed valve body and blade.Two valves are integrated into a switching valve by the present invention, have not only saved the cost of valve, save site space, and solve " tacking " phenomenon that two Fans are interfered with each other in switching action.

Description

A kind of closed switching valve of wide tee
Technical field
The present invention relates to dedusting airduct or process gases system regions, and in particular to a kind of closed switching of wide tee Valve.
Background technology
Existing frequently-used draft fan switching is general from air outlet tubing type, the structure of air inlet Y-shaped bypass type. In skill gas extraction system, a pipe-line system can be from the Fans of the using and the reserved two as power, and common way is by two typhoons Machine outlet is discharged by same chimney again after accessing a heavy caliber transverse tube, and fan outlet can first access one to avoid pipeline from shaking Section accesses a check-valves after being flexible coupling, to prevent reverse flowing of air flows.
Aforesaid way there are problems that following:
(1) two Fans air outlet access same pipeline in, when needing to switch over, using blower fan frequency progressively under Drop, standby fan frequency gradually rises, and standby fan check-valves can only wait until to stop or increase standby fan completely using blower fan Primary frequency could be opened, and opening procedure is not progressively opened, but moment open a larger angle after again by Step standard-sized sheet, so necessarily causes blast instability of flow in pipeline.
(2) phenomenon of " tacking " occurs when switching over for the using and the reserved blower fan, because two Fans are produced in switching Raw air-flow reciprocating collision in pipeline forms resonance, can not only produce noise, and pipeline to produce after resonating and can also influence it Service life.
(3) operation principle of general check valve is to be opened check-valves blade top by stream pressure, when pressure diminishes or wind When machine is stopped, is conducted oneself with dignity by blade and reach the effect being automatically switched off.To reach the flexible performance of check-valves, general meeting Reduce blade and the frictional force between blade, blade and valve body as far as possible.So high-leakage rate can be present in general check-valves.
(4) pipeline switched over using Y-shaped bypass tubular construction needs to match somebody with somebody on conventional branch road and emergency bypass pipeline Put equivalent pipe fitting (valve, elbow, short tube class).And the valve of conventional branch road and the valve of emergency bypass cannot be accomplished It is consistent with blower fan open and close frequency.
The content of the invention
It is an object of the invention to the problem above for overcoming prior art to exist, there is provided a kind of closed switching of wide tee Two valves are integrated into a switching valve by valve, the present invention, have not only saved the cost of valve, save site space, and Solve " tacking " phenomenon that two Fans are interfered with each other in switching action.
To realize above-mentioned technical purpose, above-mentioned technique effect is reached, the present invention is achieved through the following technical solutions:
A kind of closed switching valve of wide tee, it includes valve body and the valve member coordinated with the valve body, the valve Door component is arranged at the valve inner air-flow openings,
The valve member includes:Revolved by the active as the active rotation axle of the valve member drive shaft, two Driven rotary shaft that rotating shaft is rotated, the blade being separately positioned in the active rotation axle and driven rotary shaft, the master Dynamic rotary shaft is set with the driven rotary shaft in inverted triangle machine, passes through between the active rotation axle and the driven rotary shaft Linkage bar connection, the active rotation axle drives the driven rotary shaft to rotate by the linkage bar;
The valve inner is provided with band, and the band is arranged at the valve inner air-flow openings, described Band coordinates with the blade shape, and the band seals the gap between the valve body and the blade.
Further include, open up fluted in the axial direction of the driven rotary shaft, the groove is arc groove.
Further include, the edge of the blade is provided with runner sealing bar, the active rotation axle rotarily drive it is described from Dynamic rotary shaft rotation, the blade is attached on the band, and the runner sealing bar is attached in the groove.
Further include, the linkage bar is " V " character form structure, and two free ends of the linkage bar are respectively connecting to institute State in driven rotary shaft, the active rotation axle is connected at the joint of the linkage bar.
Further include, the active rotation axle and driven rotary shaft are connected by linkage block with the linkage bar, institute State and be arranged with axle sleeve in active rotation axle and driven rotary shaft.
Further include, the valve body is " Y " character form structure, the valve body includes three tubular structures, three tubulose knots Structure intersection is valve body triangle, and the valve member is arranged in the valve body triangle.
Further include, three tubular structures are respectively the first tubular structure, the second tubular structure, the 3rd tubulose knot Structure, the band, the first tubulose knot are provided with first tubular structure and the openings of second tubular structure The band is provided with structure and the openings of the 3rd tubular structure.
Further include, the openings of first tubular structure and the second tubular structure be it is circular or square, it is described First tubular structure is circular or square with the openings of the 3rd tubular structure.
Further include, flange is equipped with the tubular structure.
The beneficial effects of the invention are as follows:
, used as drive shaft, the rotary shaft of other valve blades is used as driven for valve mechanism active rotation axle of the invention Axle, the blade on active rotation axle, as common blade, is both the blade of conventional branch trackside and the blade of emergency bypass side, its Remaining all passive blades all do pendulum leaf and act by the driving of the bar that links with active rotation axle blade.
Sealed by band between blade and valve body, sealed by runner sealing bar between blade and blade, In the present invention, the caulking gum between blade and valve body and between blade and blade is not squeezed by rubber friction after control room gap Press to block air-flow, but the rotation of blade side is attached on band, the sealing strip on blade is attached at driven rotary shaft On reserved groove.When blade leans against emergency bypass side, the air-flow of conventional branch trackside can apply pressure, blade and valve on blade Fitting between body, blade and blade can increase with pressure and increasingly tightlier, when needing to switch over, rubber components also will not Frictional force is produced with valve body and blade.
Two valves are integrated into a switching valve in the present invention, valve cost has not only been saved, site space is saved, And solve " tacking " phenomenon that two Fans are interfered with each other in switching action;Valve body uses the structure of Y-shaped threeway more Beneficial to the pressure loss, and the only one of which drive shaft in switching is reduced, all of blade is all overall in the presence of the bar that links Action, the action of blade depend entirely on where the frequency on collateral road just, whole switching action is more steady.
The pressure loss of the smaller blower fan of angle of blade lean when opening and closing time valve disc piece is pushed up is smaller, and conventional check valve is opened When all of blade all in horizontal level, check-valves blade top can only be opened by air-flow when blower fan needs and opens passage.This Invention valve then avoids problems, can also easily be switched over very much in the presence of external balance hammer is not needed dynamic Make.
Described above is only the general introduction of technical solution of the present invention, in order to better understand technological means of the invention, And can be practiced according to the content of specification, below with presently preferred embodiments of the present invention and coordinate accompanying drawing describe in detail as after. Specific embodiment of the invention is shown in detail by following examples and its accompanying drawing.
Brief description of the drawings
Technical scheme in technology in order to illustrate more clearly the embodiments of the present invention, in being described to embodiment technology below The required accompanying drawing for using is briefly described, it should be apparent that, drawings in the following description are only some realities of the invention Example is applied, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to these accompanying drawings Obtain other accompanying drawings.
Fig. 1 is structural representation of the invention;
Fig. 2 is the sectional view of Fig. 1;
Fig. 3 is the switching schematic diagram of switching valve of the present invention;
1- valve bodies, 2- valve members, 3- blades, 4- bands, 100- valve body triangles, the tubular structures of 101- first, The tubular structures of 102- second, the tubular structures of 103- the 3rd, 104- flanges, 201- active rotation axles, the driven rotary shafts of 202-, 203- Linkage bar, 204- grooves, 205- linkage blocks, 206- axle sleeves, 301- runner sealing bars.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made Embodiment, belongs to the scope of protection of the invention.
Embodiment
A kind of closed switching valve of wide tee is disclosed shown in reference picture 1-3, in the present embodiment, the valve can basis The different choice blade quantity of bore, the valve using Y-shaped threeway as valve body profile, the valve part no matter insertion Mouth is circular or square, and the Delta Region in the middle of its insertion port must be monosymmetric plane domain, as shown in Figure 1 Valve triangle 100.
Also, blade only have for it is square when be just capable of achieving heavy caliber multiple-blade and process.
The structure of the switching valve in the present embodiment mainly includes valve body 1 and the valve member 2 coordinated with above-mentioned valve body 1, on State valve member 1 to be arranged at the internal gas flow openings of above-mentioned valve body 1, above-mentioned valve body 1 is " Y " character form structure, above-mentioned valve body 1 is wrapped Three tubular structures are included, three tubular structure intersections are valve body triangle 100, and above-mentioned valve member 2 is arranged on above-mentioned valve body In triangle 100.
Specifically, three above described tubular structures are respectively the first tubular structure 101, the second tubular structure 102, the 3rd tubulose Structure 103.
In the present embodiment, the openings of the tubular structure 102 of above-mentioned first tubular structure 101 and second are circular or side Shape, above-mentioned first tubular structure 101 is circular or square with the openings of above-mentioned 3rd tubular structure 103.
Further, flange 104 is equipped with above described tubular structure, facilitates valve to connect with pipeline by above-mentioned flange 104 Connect.
Specifically, above-mentioned valve member 2 includes:As 201, two, the active rotation axle of the drive shaft of above-mentioned valve member 2 The driven rotary shaft 202 that is rotated by above-mentioned active rotation axle 201, it is separately positioned on above-mentioned active rotation axle 201 and driven Blade 3 in rotary shaft 202, above-mentioned active rotation axle 201 is set with above-mentioned driven rotary shaft 202 in inverted triangle machine, above-mentioned master Dynamic to be connected by the bar 203 that links between rotary shaft 201 and above-mentioned driven rotary shaft 202, above-mentioned active rotation axle 201 is by above-mentioned Linkage bar 203 drives above-mentioned driven rotary shaft 202 to rotate, and above-mentioned active rotation axle 201 drives it to rotate by power set, its As the rotation driving axle of valve.
In the present embodiment, above-mentioned linkage bar 203 is " V " character form structure, and two free ends of above-mentioned linkage bar 203 are distinguished It is connected in above-mentioned driven rotary shaft 202, above-mentioned active rotation axle 201 is connected at the joint of above-mentioned linkage bar 203.
Further, above-mentioned active rotation axle 201 and driven rotary shaft 202 pass through linkage block 205 and above-mentioned linkage bar 203 connections, also, it is arranged with axle sleeve 206 in above-mentioned active rotation axle 201 and driven rotary shaft 202.
In the present embodiment, fluted 204 are opened up in the axial direction of above-mentioned driven rotary shaft 202, above-mentioned groove 204 is circular arc Groove, above-mentioned groove 204 is used with hing straps 3.
The edge of above-mentioned blade 3 is provided with runner sealing bar 301, and above-mentioned active rotation axle 201 rotarily drives above-mentioned driven rotation Rotating shaft 202 is rotated, and above-mentioned blade 3 is attached on band 4, and above-mentioned runner sealing bar 301 is attached in above-mentioned groove 204.
Above-mentioned band 4 is arranged at the internal gas flow openings of above-mentioned valve body 1, above-mentioned band 4 and the shape of above-mentioned blade 3 Coordinate, above-mentioned band 4 seals the gap between above-mentioned valve body 1 and above-mentioned blade 3.
The specific set location of above-mentioned band 4 is:Above-mentioned first tubular structure 101 and above-mentioned second tubular structure 102 Above-mentioned band 4 is provided with openings, is set at above-mentioned first tubular structure 101 and the openings of above-mentioned 3rd tubular structure 103 There is above-mentioned band 4.
Above-mentioned band 3 and runner sealing bar 301 are quality of rubber materials.
The operation principle of the present embodiment is as follows:
As shown in figure 3, active rotation axle 201 is used as drive shaft, the rotary shaft of other valve blades 3 is used as driven rotation Axle 202, the blade on active rotation axle 201, as common blade, is both blade and the emergency bypass side of conventional branch trackside Blade, remaining all passive blade all do pendulum leaf and act by the driving of the bar that links with the blade 3 of active rotation axle 201.
Sealed by band 4 between blade 3 and valve body 1, runner sealing bar 301 is passed through between blade 3 and blade 3 Sealing, in the present embodiment, the caulking gum between blade 3 and valve body 1 and between blade 3 and blade 3 does not pass through control room Rubber friction is extruded to block air-flow after gap, but the rotation of blade side is attached on band 4, the sealing strip patch on blade Invest on the reserved groove 204 of driven rotary shaft.When blade 3 leans against emergency bypass side, the air-flow for commonly using branch trackside can be in blade Upper applying pressure, fitting between blade and valve body, blade and blade can be increasingly tighter with pressure increase, when needs are cut Rubber components also will not produce frictional force with valve body and blade when changing.
Two valves are integrated into a switching valve by the present embodiment, have not only saved valve cost, save site space, And solve " tacking " phenomenon that two Fans are interfered with each other in switching action;Valve body uses the structure of Y-shaped threeway more Beneficial to the pressure loss, and the only one of which drive shaft in switching is reduced, all of blade is all overall in the presence of the bar that links Action, the action of blade depend entirely on where the frequency on collateral road just, whole switching action is more steady.
The pressure loss of the smaller blower fan of angle of blade lean when opening and closing time valve disc piece is pushed up is smaller, and conventional check valve is opened When all of blade all in horizontal level, check-valves blade top can only be opened by air-flow when blower fan needs and opens passage.This Invention valve then avoids problems, can also easily be switched over very much in the presence of external balance hammer is not needed dynamic Make.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or uses the present invention. Various modifications to these embodiments will be apparent for those skilled in the art, as defined herein General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, the present invention The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one The scope most wide for causing.

Claims (9)

1. the closed switching valve of a kind of wide tee, it includes valve body and the valve member coordinated with the valve body, the valve Component is arranged at the valve inner air-flow openings, it is characterised in that
The valve member includes:As the active rotation axle of the valve member drive shaft, two by the active rotation axle The driven rotary shaft being rotated, the blade being separately positioned in the active rotation axle and driven rotary shaft, the active rotation Rotating shaft is set with the driven rotary shaft in inverted triangle machine, by linkage between the active rotation axle and the driven rotary shaft Bar is connected, and the active rotation axle drives the driven rotary shaft to rotate by the linkage bar;
The valve inner is provided with band, and the band is arranged at the valve inner air-flow openings, the sealing Band coordinates with the blade shape, and the band seals the gap between the valve body and the blade.
2. the closed switching valve of wide tee according to claim 1, it is characterised in that the axial direction of the driven rotary shaft On open up fluted, the groove be arc groove.
3. the closed switching valve of wide tee according to claim 2, it is characterised in that the edge of the blade is provided with leaf Piece sealing strip, the active rotation axle rotarily drives the driven rotary shaft rotation, and the blade is attached on the band, The runner sealing bar is attached in the groove.
4. the closed switching valve of wide tee according to claim 1, it is characterised in that the linkage bar is " V " font Structure, two free ends of the linkage bar are respectively connecting in the driven rotary shaft, are connected at the joint of the linkage bar It is connected to the active rotation axle.
5. the closed switching valve of wide tee according to claim 4, it is characterised in that the active rotation axle and driven Rotary shaft is connected by linkage block with the linkage bar, and axle sleeve is arranged with the active rotation axle and driven rotary shaft.
6. the closed switching valve of wide tee according to claim 1, it is characterised in that the valve body is " Y " font knot Structure, the valve body includes three tubular structures, and three tubular structure intersections are valve body triangle, and the valve member is arranged on In the valve body triangle.
7. the closed switching valve of wide tee according to claim 6, it is characterised in that three tubular structures difference It is the first tubular structure, the second tubular structure, the 3rd tubular structure, first tubular structure and second tubular structure The band is provided with openings, is provided with described close at first tubular structure and the openings of the 3rd tubular structure Envelope band.
8. the closed switching valve of wide tee according to claim 7, it is characterised in that first tubular structure and The openings of two tubular structures are circular or square, and first tubular structure is with the openings of the 3rd tubular structure It is circular or square.
9. the closed switching valve of wide tee according to claim 6, it is characterised in that be equipped with the tubular structure Flange.
CN201710270503.4A 2017-04-24 2017-04-24 Large-caliber three-way closed switching valve Active CN106885015B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710270503.4A CN106885015B (en) 2017-04-24 2017-04-24 Large-caliber three-way closed switching valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710270503.4A CN106885015B (en) 2017-04-24 2017-04-24 Large-caliber three-way closed switching valve

Publications (2)

Publication Number Publication Date
CN106885015A true CN106885015A (en) 2017-06-23
CN106885015B CN106885015B (en) 2023-05-23

Family

ID=59183543

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710270503.4A Active CN106885015B (en) 2017-04-24 2017-04-24 Large-caliber three-way closed switching valve

Country Status (1)

Country Link
CN (1) CN106885015B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108916396A (en) * 2018-08-29 2018-11-30 盐城市大丰超威机械有限公司 A kind of coordinated type check-valves
CN110374659A (en) * 2019-08-27 2019-10-25 张有权 The distinguished and admirable partition control valve of coalmine ventilation multi-pass

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6182699B1 (en) * 1997-02-13 2001-02-06 David R. Hawkes Diverter valve for improved flow control
CN201133496Y (en) * 2007-12-26 2008-10-15 河南省正龙煤业有限公司 Single control double gyration three-way dividing valve
CN101994856A (en) * 2009-08-28 2011-03-30 北新集团建材股份有限公司 Rectangular three-way automatic adjuster
CN202392175U (en) * 2011-10-11 2012-08-22 成都建筑材料工业设计研究院有限公司 Anti-plugging three-way valve with two valve plates
CN102705533A (en) * 2012-06-15 2012-10-03 江苏泓明达机械有限公司 Lateral three-way electric separating valve
CN203395260U (en) * 2013-07-12 2014-01-15 常州联合锅炉容器有限公司 Material reversing valve
CN206708453U (en) * 2017-04-24 2017-12-05 致和环境科技(江苏)有限公司 A kind of closed switching valve of wide tee

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6182699B1 (en) * 1997-02-13 2001-02-06 David R. Hawkes Diverter valve for improved flow control
CN201133496Y (en) * 2007-12-26 2008-10-15 河南省正龙煤业有限公司 Single control double gyration three-way dividing valve
CN101994856A (en) * 2009-08-28 2011-03-30 北新集团建材股份有限公司 Rectangular three-way automatic adjuster
CN202392175U (en) * 2011-10-11 2012-08-22 成都建筑材料工业设计研究院有限公司 Anti-plugging three-way valve with two valve plates
CN102705533A (en) * 2012-06-15 2012-10-03 江苏泓明达机械有限公司 Lateral three-way electric separating valve
CN203395260U (en) * 2013-07-12 2014-01-15 常州联合锅炉容器有限公司 Material reversing valve
CN206708453U (en) * 2017-04-24 2017-12-05 致和环境科技(江苏)有限公司 A kind of closed switching valve of wide tee

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108916396A (en) * 2018-08-29 2018-11-30 盐城市大丰超威机械有限公司 A kind of coordinated type check-valves
CN110374659A (en) * 2019-08-27 2019-10-25 张有权 The distinguished and admirable partition control valve of coalmine ventilation multi-pass

Also Published As

Publication number Publication date
CN106885015B (en) 2023-05-23

Similar Documents

Publication Publication Date Title
CN106885015A (en) A kind of closed switching valve of wide tee
CN206708453U (en) A kind of closed switching valve of wide tee
JPS60165455A (en) Sealing device
CN213745082U (en) Special anti-backflow desulfurization butterfly valve for power plant
CN201787121U (en) Gas-filled type gas transmission pipeline cut-off device
CN206017745U (en) A kind of pneumatic stopping valve
CN2389264Y (en) Magnetic force rotary type valve
CN209430810U (en) Check-valves and air-conditioning system
CN209510365U (en) A kind of tunnel ventilation smoke evacuation double-purpose system
CN207018586U (en) A kind of pipe fitting for controlling water (flow) direction
CN209229052U (en) A kind of PVC ball valve
CN207906519U (en) One kind having Telescopic high-pressure check valve
CN208793706U (en) A kind of lining fire safe type high temperature tee joint butterfly valve
CN208816813U (en) A kind of waterproof plektron buffering exhaust valve
CN103867754B (en) Pneumatic reversing device for continuous high-temperature air combustion system
CN208024858U (en) manual chlorine cast steel stop valve
CN207145684U (en) Seal check-valves
CN215522049U (en) Novel anti-rusting ball valve
CN205876765U (en) One -way scavenger fan of pipeline
CN217355657U (en) Three-way pipe with high fluid fluency
CN208750073U (en) A kind of pneumatic operated valve connector of good airproof performance
CN207701807U (en) A kind of valve with long service life
CN213451759U (en) Flap valve that leakproofness is high
CN204756037U (en) Check valve of waterproof hammer
CN109578635A (en) Check-valves and air-conditioning system

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant