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CN107676531A - A kind of Intelligent ball valve - Google Patents

A kind of Intelligent ball valve Download PDF

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Publication number
CN107676531A
CN107676531A CN201711094696.9A CN201711094696A CN107676531A CN 107676531 A CN107676531 A CN 107676531A CN 201711094696 A CN201711094696 A CN 201711094696A CN 107676531 A CN107676531 A CN 107676531A
Authority
CN
China
Prior art keywords
valve
alignment pin
interior
valve body
interface channel
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
CN201711094696.9A
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Chinese (zh)
Other versions
CN107676531B (en
Inventor
汪晓岗
王广
陈建强
孙斌
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.)
Ningbo Yuhua Electric Appliance Co Ltd
Original Assignee
Ningbo Yuhua Electric Appliance 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 Ningbo Yuhua Electric Appliance Co Ltd filed Critical Ningbo Yuhua Electric Appliance Co Ltd
Priority to CN201711094696.9A priority Critical patent/CN107676531B/en
Publication of CN107676531A publication Critical patent/CN107676531A/en
Application granted granted Critical
Publication of CN107676531B publication Critical patent/CN107676531B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F16K37/00Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0025Electrical or magnetic means
    • 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
    • F16K27/00Construction of housing; Use of materials therefor
    • F16K27/06Construction of housing; Use of materials therefor of taps or cocks
    • F16K27/067Construction of housing; Use of materials therefor of taps or cocks with spherical plugs

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Valve Housings (AREA)

Abstract

The invention discloses a kind of Intelligent ball valve, it is related to Gas Pipe valve technology field, including valve body, valve element in valve body, the valve rod and intelligent object being connected through valve body and with valve element top, also include an alignment pin, a positioning hole is provided with the downside of the valve element, the storage tank of an intelligent object for being used for placement is provided with the downside of the valve body, the alignment pin is fixed through body base and with valve body vertically, alignment pin upper end is interspersed on the downside of valve element in positioning hole, alignment pin lower end is extended on the downside of valve body in storage tank, interface channel is provided with the alignment pin, gas distribution channel is provided with the valve element, a bottom is provided with the storage tank lower ending opening.The present invention propose it is a kind of can long-time storage ball valve dispatch from the factory information and easy take out is changed, safeguards the Intelligent ball valve of intelligent object.

Description

A kind of Intelligent ball valve
Technical field
The present invention relates to Gas Pipe valve technology field, more particularly to one kind can store ball valve and dispatch from the factory information and monitoring combustion gas The Intelligent ball valve of pressure in course of conveying.
Background technology
In gas pipeline system, PE ball valves play the on-off action in pipe gas course of conveying, and operating pipeline leads to Often need to control the fuel gas transmission in downstream by the switch of valve.Valve is before dispatching from the factory, and manufacturer is often on valve Mark is sticked, with tracing informations such as the production time of the product, production process, the time of making the product in mark.Institute in the market The valve used only has simple paster to identify substantially, and causes by outdoor environment factor the letter identified on the valve throughout the year Cease smudgy, can not recognize.When pipe network maintenance workers safeguard valve, it is necessary to by design drawing and consult pipeline paving originally If associated documents, this process is complex and time-consuming.Also, existing valve seldom has valve during monitoring fuel gas transmission The function of pressure, even if having, and intelligent object is fixed in valve in door, is used once valve loads pipeline, intelligent mould Block just safeguard, change by more difficult take out.
The content of the invention
The present invention in order to solve the above problems, propose one kind can long-time storage ball valve dispatch from the factory information and easy taking-up Change, safeguard the Intelligent ball valve of intelligent object.
To achieve these goals, the present invention uses following technical scheme:A kind of Intelligent ball valve, including valve body, located at valve Internal valve element, the valve rod and intelligent object being connected through valve body and with valve element top, in addition to an alignment pin, the valve element Downside is provided with a positioning hole, and the storage tank of an intelligent object for being used for placement, the alignment pin are provided with the downside of the valve body Run through body base vertically and fixed with valve body, alignment pin upper end is interspersed on the downside of valve element in positioning hole, the extension of alignment pin lower end On the downside of to valve body in storage tank;
It is provided with interface channel in the alignment pin, the upper side opening of the interface channel is interface channel air inlet, open lower side For interface channel gas outlet, the interface channel air inlet and interface channel gas outlet are opened in alignment pin side wall, the company Connect road air inlet to be located in positioning hole, the interface channel gas outlet is located in storage tank;
Gas distribution channel is provided with the valve element, the upper side opening of the gas distribution channel is gas distribution channel air inlet, and open lower side is Gas distribution channel gas outlet, the gas distribution channel air inlet is on valve element inner hole wall, and the gas distribution channel gas outlet is positioned at positioning In the side wall of hole;
When valve element and valve body are in connected state, gas distribution channel gas outlet connects with interface channel air inlet;When valve element and valve body are in Off-state, gas distribution channel gas outlet are staggered with interface channel air inlet;
A bottom is provided with the storage tank lower ending opening, passes through threaded engagement, the intelligence between the bottom and storage tank Energy module is in storage tank.
Preferably, the alignment pin bottom is provided with a screwed hole and an outer-hexagonal bolt coordinated with screwed hole, The screwed hole connects with interface channel, and the outer-hexagonal bolt is inverted and is located in screwed hole, and twists and can cut on outer-hexagonal bolt Connection breaking passage;Thread center's line of the outer-hexagonal bolt overlaps with thread center's line of bottom, and the spiral shell of outer-hexagonal bolt Line is opposite with the thread rotary orientation of bottom;The bottom upper surface is vertical an interior hexagonal sleeve pipe, and the interior hexagonal its lower end is consolidated It is scheduled on bottom, upper end is open, and the endoporus cross section of interior hexagonal sleeve pipe is one and matched with outer-hexagonal nuts portion outer-hexagonal Hexagon, the cap portion of the outer-hexagonal bolt can be fastened on the endoporus of interior hexagonal sleeve pipe and can be along above and below the endoporus of interior hexagonal sleeve pipe Slide.
The is provided with preferably, offer a sealing ring neck in the alignment pin side wall, in the sealing ring neck One sealing ring, the interface channel air inlet are located in the first sealing ring.
It is used to seal the second close of gap between alignment pin and positioning hole preferably, being arranged with one on the alignment pin Seal, second sealing ring are located on the downside of the first sealing ring.
Preferably, the bottom is provided with the 3rd sealing ring for being used for sealing marginal gap between bottom and valve body.
Preferably, it is provided with some installation via holes on the downside of the bottom.
Therefore, the present invention has the advantages that:1st, valve body is in body cavity and intelligence when connecting feed status with valve element The storage tank of energy module connects also by interface channel with gas distribution channel, the pressure being easy to during intelligent object monitoring fuel gas transmission Force value;2nd, when valve body and valve element are in off-state, interface channel staggers with gas distribution channel, body cavity and intelligent object it is accommodating Groove also disconnects, and is easy to intelligent object to take out and safeguards, changes;3rd, the outer-hexagonal bolt of interface channel can be blocked by being provided with, and outside Hex bolts is opposite with the thread rotary orientation of bottom so that when bottom is unscrewed, outer-hexagonal bolt can block interface channel;So that bottom When lid screws, outer-hexagonal bolt can discharge connection interface channel, further ensure when safeguarding, changing intelligent object, valve body Interior combustion gas will not be revealed.
Brief description of the drawings
Fig. 1 is the structural representation of valve body of the present invention and valve element connected state.
Fig. 2 is the structural representation of valve body of the present invention and valve element off-state.
Fig. 3 is the enlarged diagram at a in Fig. 1.
Fig. 4 is the enlarged diagram at b in Fig. 2.
Fig. 5 is the structural representation of alignment pin in the present invention.
Fig. 6 is the structural representation of another angle of alignment pin in the present invention.
Fig. 7 is the front view of alignment pin in the present invention.
Fig. 8 is the sectional view of A-A in Fig. 7.
Fig. 9 is the side view of alignment pin in the present invention.
Figure 10 is the structural representation of bottom in the present invention.
Figure 11 is the structural representation of another angle of bottom in the present invention.
Figure 12 is the front view of bottom in the present invention.
Figure 13 is the sectional view of B-B in Figure 12.
Figure 14 is bottom and valve body screw thread screws the structural representation of place and the 3rd sealing ring.
Figure 15 is the structural representation of hex bolts use state in China and foreign countries' of the present invention.
1:Valve body;101:Storage tank;2:Valve element;201:Positioning hole;3:Valve rod;4:Intelligent object;5:Alignment pin;6:Bottom Lid;601:Interior hexagonal sleeve pipe;602:3rd sealing ring;603:Via hole is installed;7:Interface channel;701:Interface channel air inlet Mouthful;702:Interface channel gas outlet;703:Screwed hole;8:Gas distribution channel;801:Gas distribution channel air inlet;802:Gas distribution channel goes out Gas port;9:First sealing ring;10:Second sealing ring;11:Outer-hexagonal bolt.
Embodiment
The present invention will be further described with specific embodiment below in conjunction with the accompanying drawings.
A kind of Intelligent ball valve, referring to Fig. 1 to Fig. 4, including valve body 1, the spherical valve element 2 in valve body 1, through valve body 1 and the valve rod 3 and intelligent object 4 that are connected with the top of valve element 2, in addition to an alignment pin 5, the downside of valve element 2 be provided with one The positioning hole 201 of column, the central axis of the positioning hole 201 overlap with the central axis of valve rod 3, and in positioning hole 201 Mandrel line passes through the centre of sphere of valve element 2, and the downside of valve body 1 is provided with the storage tank 101 of an intelligent object 4 for being used for placement, institute State alignment pin 5 to run through the bottom of valve body 1 vertically and fix with valve body 1, the upper end of alignment pin 5 is interspersed in the downside positioning hole 201 of valve element 2 It is interior so that when valve rod 3 rotates with movable valve plug 2, valve element 2 can be positioned at rotation on alignment pin 5, be also prevented from valve element 2 because of left and right sides Air pressure, left and right skew occurs and floats, the lower end of alignment pin 5 is extended in the downside storage tank 101 of valve body 1.
Interface channel 7 is provided with the alignment pin 5, as shown in Figures 5 to 9, the interface channel 7 connects into " C " font The upper side opening of passage 7 is interface channel air inlet 701, and open lower side is interface channel gas outlet 702, and the interface channel enters Gas port 701 and interface channel gas outlet 702 laterally set and are opened in the side wall of alignment pin 5, the interface channel air inlet 701 in positioning hole 201, and the interface channel gas outlet 702 is located in storage tank 101, and the interlude of interface channel 7 is set vertically Put in alignment pin 5.A sealing ring neck is offered in the side wall of alignment pin 5, first is provided with the sealing ring neck Sealing ring 9, the side of the first sealing ring 9 are bonded with the side wall of alignment pin 5, and opposite side is bonded with the inwall of positioning hole 201, the company Connect road air inlet 701 be located in the first sealing ring 9, first sealing ring 9 for prevent interface channel air inlet 701 with it is defeated When gas passage gas outlet 802 is staggered, still there is gas to enter interface channel air inlet 701 from valve body 1.It is arranged on the alignment pin 5 There is one to be used to sealing second sealing ring 10 in gap between alignment pin 5 and positioning hole 201, the inner side of the second sealing ring 10 with The fitting of the outer wall of alignment pin 5 is sealed, outside is bonded with the inwall of positioning hole 201, and second sealing ring 10 is located under the first sealing ring 9 Side, the second sealing ring 10 can further prevent gas from entering connection from gap location between sealing alignment pin 5 and positioning hole 201 and leading to Road air inlet 701.
Gas distribution channel 8 is provided with the valve element 2, the upper side opening of the gas distribution channel 8 is gas distribution channel air inlet 801, Open lower side is gas distribution channel gas outlet 802, and the gas distribution channel air inlet 801 on the inner hole wall of valve element 2, lead to by the gas transmission Road gas outlet 802 is located in the side wall of positioning hole 201.
When the rotation of valve element 2 is extremely in complete connected state with valve body 1, gas distribution channel gas outlet 802 and interface channel air inlet Mouth 701 is also just relative, and gas distribution channel 8 also connects with interface channel 7;When valve element 2 and valve body 1 are in off-state, gas distribution channel Gas outlet 802 is staggered with interface channel air inlet 701, and gas distribution channel 8 also disconnects with interface channel 7.
A bottom 6 is provided with the lower ending opening of storage tank 101, as shown in Figure 10 to Figure 13, the bottom 6 is with housing It is close provided be used to seal marginal gap between bottom 6 and valve body 1 the 3rd by threaded engagement, the bottom 6 between groove 101 Seal 602, the upper surface edge of bottom 6 are provided with the groove of the 3rd sealing ring 602, and the 3rd sealing ring 602 is arranged on In groove, the plane with the fitted seal of the 3rd sealing ring 602 is provided with the downside storage tank 101 of valve body 1, when bottom 6 and valve When body 1 screws, sealing is realized by extruding the 3rd sealing ring 602 at internal edge, as shown in figure 14.The downside of bottom 6 is set There are four installation via holes 603, screw installation bottom 6 for inserting, the intelligent object 4 is in storage tank 101, the intelligence The tracing information such as the production time of the writable product, production process, time of making the product in energy module 4, can after construction party installation The information such as engineering time construction person liable are write, and during the later stage is to pipeline maintenance, the intelligent object 4 can launch GPS Positioning signal, allow pipeline maintenance personnel to be quickly found out the installation site of the valve, and by Bluetooth signal transmission, phase is carried out to it Close information writes input, can also set baroceptor, monitors the atmospheric pressure value in valve internal combustion gas transmitting procedure.
The bottom of alignment pin 5 is vertically provided with a screwed hole 703 and an outer-hexagonal bolt coordinated with screwed hole 703 11, the screwed hole 703 connects with interface channel 7, and the outer-hexagonal bolt 11 is inverted and is located in screwed hole 703, and outer-hexagonal Interface channel 7 can be cut off during being twisted on bolt 11;Thread center's line of the outer-hexagonal bolt 11 and the thread center of bottom 6 Line overlaps, and the screw thread of outer-hexagonal bolt 11 is opposite with the thread rotary orientation of bottom 6;The upper surface of bottom 6 is vertical to be had six in one Angle sleeve pipe 601, the interior lower end of hexagonal sleeve pipe 601 are fixed on bottom 6, and upper end is open, and the endoporus of interior hexagonal sleeve pipe 601 is transversal Face is a hexagon matched with the cap portion outer-hexagonal of outer-hexagonal bolt 11, in the cap portion of the outer-hexagonal bolt 11 can be fastened on The endoporus of hexagonal sleeve pipe 601 can simultaneously slide up and down along the endoporus of interior hexagonal sleeve pipe 601, as shown in figure 15.When outer-hexagonal bolt 11 Cap portion when being fastened on the endoporus of interior hexagonal sleeve pipe 601, outer-hexagonal bolt 11 can rotate together with bottom 6, also, due to outer The screw thread of hex bolts 11 is opposite with the thread rotary orientation of bottom 6 so that bottom 6 toward rotational direction rotate when, outer-hexagonal bolt 11 Rotated toward tightening direction;Bottom 6 toward tightening direction rotate when, outer-hexagonal bolt 11 toward rotational direction rotate.
During pipeline use, when the rotation of valve element 2 is extremely in complete connected state with valve body 1, gas distribution channel gas outlet 802 is just relative with interface channel air inlet 701, and gas distribution channel 8 connects with interface channel 7, the inner chamber of valve body 1 and storage tank 101 Connected also by interface channel 7 with gas distribution channel 8, the intelligent object 4 in storage tank 101 just can monitor fuel gas transmission mistake Pressure value in journey;When valve element 2 and valve body 1 are in off-state, gas distribution channel gas outlet 802 is wrong with interface channel air inlet 701 Open, gas distribution channel 8 disconnects with interface channel 7, and the inner chamber of valve body 1 does not connect with storage tank 101, also, storage tank 101 is only in one Vertical sealing cavity, personnel easy to operation remove bottom 6 and change, safeguard intelligent object 4.
During bottom 6 is removed in operating personnel's rotation, outer-hexagonal bolt 11 can rotate toward tightening direction, i.e., up rotate Mobile, during outer hex bolts 11 is up in rotary moving, the epimere of outer-hexagonal bolt 11 can cut off interface channel 7, and continue Move up, until bottom 6 is removed, interface channel 7 is cut off using outer-hexagonal bolt 11, is further ensured and is being changed, safeguarding intelligence During module 4, combustion gas will not leak from interface channel 7.Intelligent object 4 changes, safeguard after, when need to install back bottom 6, The endoporus that the cap portion of the downside of outer-hexagonal bolt 11 is first directed to hexagonal sleeve pipe 601 in the upside of bottom 6 inserts, the outside screw of bottom 6 The alignment screw thread of storage tank 101 screws, and in the screwing operations of bottom 6, outer-hexagonal bolt 11 can rotate toward rotational direction, i.e., down In rotary moving, during outer hex bolts 11 is down in rotary moving, the epimere of outer-hexagonal bolt 11 can gradually discharge interface channel 7 so that whole section of interface channel 7 recovers connection.

Claims (6)

1. a kind of Intelligent ball valve, including valve body(1), located at valve body(1)Interior valve element(2), through valve body(1)And and valve element(2) The valve rod of top connection(3)And intelligent object(4), it is characterised in that:Also include an alignment pin(5), the valve element(2)Downside Provided with a positioning hole(201), the valve body(1)Downside is provided with an intelligent object for being used to place(4)Storage tank (101), the alignment pin(5)Run through valve body vertically(1)Bottom and and valve body(1)It is fixed, alignment pin(5)Upper end is interspersed in valve element (2)Downside positioning hole(201)It is interior, alignment pin(5)Lower end extends to valve body(1)Downside storage tank(101)It is interior;
The alignment pin(5)It is interior to be provided with interface channel(7), the interface channel(7)Upper side opening be interface channel air inlet (701), open lower side is interface channel gas outlet(702), the interface channel air inlet(701)With interface channel gas outlet (702)It is opened in alignment pin(5)Side wall, the interface channel air inlet(701)Positioned at positioning hole(201)It is interior, the connection Passage gas outlet(702)Positioned at storage tank(101)It is interior;
The valve element(2)It is interior to be provided with gas distribution channel(8), the gas distribution channel(8)Upper side opening be gas distribution channel air inlet (801), open lower side is gas distribution channel gas outlet(802), the gas distribution channel air inlet(801)Located at valve element(2)Inner hole wall On, the gas distribution channel gas outlet(802)Positioned at positioning hole(201)In side wall;
Work as valve element(2)With valve body(1)In connected state, gas distribution channel gas outlet(802)With interface channel air inlet(701)Even It is logical;Work as valve element(2)With valve body(1)In off-state, gas distribution channel gas outlet(802)With interface channel air inlet(701)Stagger;
The storage tank(101)A bottom is provided with lower ending opening(6), the bottom(6)With storage tank(101)Between pass through Threaded engagement, the intelligent object(4)Located at storage tank(101)It is interior.
A kind of 2. Intelligent ball valve according to claim 1, it is characterised in that:The alignment pin(5)Bottom is provided with a spiral shell Pit(703)And one and screwed hole(703)The outer-hexagonal bolt of cooperation(11), the screwed hole(703)With interface channel(7) Connection, the outer-hexagonal bolt(11)Inversion is located at screwed hole(703)It is interior, and outer-hexagonal bolt(11)Upper stubborn cut-off connection is logical Road(7);The outer-hexagonal bolt(11)Thread center's line and bottom(6)Thread center line overlap, and outer-hexagonal bolt (11)Screw thread and bottom(6)Thread rotary orientation it is opposite;The bottom(6)Upper surface is vertical an interior hexagonal sleeve pipe(601), institute State interior hexagonal sleeve pipe(601)Lower end is fixed on bottom(6)On, upper end is open, interior hexagonal sleeve pipe(601)Endoporus cross section be one Individual and outer-hexagonal bolt(11)The hexagon of cap portion outer-hexagonal matching, the outer-hexagonal bolt(11)Cap portion can be fastened in six Angle sleeve pipe(601)Endoporus and can be along interior hexagonal sleeve pipe(601)Endoporus slide up and down.
A kind of 3. Intelligent ball valve according to claim 1 or 2, it is characterised in that:The alignment pin(5)Offered in side wall One sealing ring neck, the sealing ring neck is interior to be provided with the first sealing ring(9), the interface channel air inlet(701)It is located at First sealing ring(9)It is interior.
A kind of 4. Intelligent ball valve according to claim 2, it is characterised in that:The alignment pin(5)On be arranged with a use In sealing alignment pin(5)With positioning hole(201)Between gap the second sealing ring(10), second sealing ring(10)Positioned at One sealing ring(9)Downside.
A kind of 5. Intelligent ball valve according to claim 1, it is characterised in that:The bottom(6)It is provided with and is used to seal bottom Lid(6)With valve body(1)Between marginal gap the 3rd sealing ring(602).
A kind of 6. Intelligent ball valve according to claim 1 or 5, it is characterised in that:The bottom(6)Downside is provided with some peaces Fill via hole(603).
CN201711094696.9A 2017-11-09 2017-11-09 Intelligent ball valve Active CN107676531B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711094696.9A CN107676531B (en) 2017-11-09 2017-11-09 Intelligent ball valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711094696.9A CN107676531B (en) 2017-11-09 2017-11-09 Intelligent ball valve

Publications (2)

Publication Number Publication Date
CN107676531A true CN107676531A (en) 2018-02-09
CN107676531B CN107676531B (en) 2023-12-29

Family

ID=61146454

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201711094696.9A Active CN107676531B (en) 2017-11-09 2017-11-09 Intelligent ball valve

Country Status (1)

Country Link
CN (1) CN107676531B (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000329255A (en) * 1999-05-19 2000-11-30 Koyo Sangyo Kk Gas cock
CN202971986U (en) * 2012-11-13 2013-06-05 大众阀门集团有限公司 Large-caliber fuel gas double-door ball valve
CN104514895A (en) * 2014-12-01 2015-04-15 华英伦科技(宁波)有限公司 Ball valve of gas fuel pipeline provided with self-closing barometer connector
KR101685195B1 (en) * 2016-06-03 2016-12-20 채희관 Ball valve with a dual pressure measuring device
CN207514367U (en) * 2017-11-09 2018-06-19 宁波市宇华电器有限公司 A kind of Intelligent ball valve

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000329255A (en) * 1999-05-19 2000-11-30 Koyo Sangyo Kk Gas cock
CN202971986U (en) * 2012-11-13 2013-06-05 大众阀门集团有限公司 Large-caliber fuel gas double-door ball valve
CN104514895A (en) * 2014-12-01 2015-04-15 华英伦科技(宁波)有限公司 Ball valve of gas fuel pipeline provided with self-closing barometer connector
KR101685195B1 (en) * 2016-06-03 2016-12-20 채희관 Ball valve with a dual pressure measuring device
CN207514367U (en) * 2017-11-09 2018-06-19 宁波市宇华电器有限公司 A kind of Intelligent ball valve

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