CN103174868A - Diaphragm valve with adjustable pressure and adjustable flow range - Google Patents
Diaphragm valve with adjustable pressure and adjustable flow range Download PDFInfo
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- CN103174868A CN103174868A CN2013100474978A CN201310047497A CN103174868A CN 103174868 A CN103174868 A CN 103174868A CN 2013100474978 A CN2013100474978 A CN 2013100474978A CN 201310047497 A CN201310047497 A CN 201310047497A CN 103174868 A CN103174868 A CN 103174868A
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Abstract
The invention discloses a diaphragm valve with adjustable pressure and a adjustable flow range. The diaphragm valve with the adjustable pressure and the adjustable flow range comprises a valve body (1), a valve core (2), a spring (3), a neck casing (4), a control liquid interface (5), a control cavity (6), a front pressure sensor (7), a top cover (10), a diaphragm piece (11), a valve cavity (11), a valve signal processing unit (13), a rear pressure sensor (14) and a valve control unit (15). The pressure sensor is installed on the valve body and connected with the valve signal processing unit or the control unit. The flow and the pressure of liquid passing through the valve cavity are monitored or regulated in real time. Small-flow high-precision linear control is achieved. The structure is simple and practical, control efficiency is high, production, operation and maintenance are convenient, an application range is wide and economic benefits and social benefits are obvious.
Description
Technical field
The invention belongs to International Classification of Patents F15B fluid pressure actuator or F16K control valve unit technology, especially pressure and range of flow adjustable membrane valve.
Background technique
The barrier film pilot valve is also a kind of hydraulic control valve, be with the pressure medium of pipeline own as power source, open and close, regulate, front pilot valve and system's tubule road various combination, just can have nearly 30 kinds of functions, obtain gradually more general use now.Pilot valve, can use separately or several being used in combination because the pilot valve kind is a lot of by moving as the variation of the water level of control object and pressure, the function that just can make the main valve acquisition carry out independent or compound adjusting to water level and hydraulic pressure and flow etc.But the similar stop valve of main valve, during valve wide open, its pressure loss is more much bigger than other valves, and each aperture loss coefficient is approaching with full cut-off, increases severely, and valve aperture is larger just more remarkable.Valve with above-mentioned characteristic, near full cut-off the time, the action of flap is accelerated, and the percussive pressure of water hammer water easily occurs, and during near full cut-off, valve event is more slow better, so throttle mechanism can be set on flap.The throttling of pilot valve and action part will avoid arranging special small-bore aperture as far as possible in addition, in order to avoid stop up.To add filter screen in case of necessity, periodical repair and bypass line is set.
The hydraulic control valve working principle: hydraulic control valve is separated membranous type and piston type two classes, and critical piece is comprised of a main valve and the conduit of setting up, pilot valve, needle-valve, ball valve and pressure gauge etc.it utilizes the upstream and downstream pressure difference to be power, controlled by pilot valve, when making press water in control room, diaphragm piston top be discharged to atmosphere or downstream low pressure area, act on force value below valve disc bottom and barrier film just greater than the force value of top, so the main valve valve disc is shifted onto the position of opening fully, when the pressure in entering control room, diaphragm piston top can not be discharged to atmosphere or the low district in downstream, the force value that acts on diaphragm piston top is just greater than the force value of below, so will be pressed onto complete closed position to the main valve valve disc, in the time of in the middle of the force value in control room, diaphragm piston top is in inlet pressure and outlet pressure, the main valve valve disc just is in adjustment state, its adjusted position depends on needle-valve in conduit system and the synergy of adjustable pilot valve.Adjustable pilot valve can and open greatly or turn down the little valve port of himself by the outlet pressure in downstream with its variation, thereby changes the force value in control room, diaphragm piston top, controls the adjusted position of main valve valve disc.
Pilot valve, can use separately or several being used in combination because the pilot valve kind is a lot of by moving as the variation of the water level of control object and pressure, the function that just can make the main valve acquisition carry out independent or compound adjusting to water level and hydraulic pressure and flow etc.But the similar stop valve of main valve, during valve wide open, its pressure loss is more much bigger than other valves, and each aperture loss coefficient is approaching with full cut-off, increases severely, and valve aperture is larger just more remarkable.Valve with above-mentioned characteristic, near full cut-off the time, the action of flap is accelerated, and water hammer easily occurs in the percussive pressure of water, and during near full cut-off, valve event is more slow better, so throttle mechanism can be set on flap.Use hydraulic control valve, at first will note type selecting.Type selecting is improper, can cause to block water and gas leak phenomenon.When selecting hydraulic control valve, must multiply by by equipment consumption of steam hourly and select multiplying power 2-3 doubly to be maximum condensate flow, select the water displacement of hydraulic control valve.Existing hydraulic control valve does not still possess pressure and flow detection function, therefore can't guarantee that hydraulic control valve can discharge water of condensation as early as possible when driving, improve rapidly the temperature of heating plant, simultaneously, also make hydraulic control valve discharging energy inadequate, can cause water of condensation in time not discharge, reduce the thermal efficiency of heating plant.
In prior art, rare correlation technique is open.
Chinese patent application 201020578894 relates to a kind of modulating valve, particularly a kind of micro-control flow regulating valve.the invention provides following technological scheme: a kind of micro-control flow regulating valve, include valve body, valve gap and piston, be provided with inlet passage in valve body, the medium flow pass, connection chamber, sealing seat and be located at the spring that compresses in connection chamber, valve body is provided with guide channel and pressure relief unit, be provided with the micro-positioning regulators switch between pressure relief unit and guide channel, be evenly equipped with pilot hole on piston, pressure relief unit includes mounting blocks, baffle and drive block, mounting blocks is provided with the axis hole adaptive with the micro-positioning regulators switch, baffle is provided with the guide hole with axis hole and connection chamber conducting, be provided with attachment hole between the axis hole of mounting blocks and guide hole, one side of attachment hole is provided with the pod apertures with the guide channel conducting, piston is provided with and drive block interlock and the interlock projection that screws by multiple thread.
The proportional cartridge valve of 201,110,402,682 1 kinds of variable-flow gains of Chinese patent application, comprise valve pocket, the hollow spool with damping hole, control cover plate, valve gap, displacement transducer and pilot-actuated valve, it is characterized in that: pack in valve pocket in the hollow spool bottom, hollow spool bottom and valve pocket linear sealing, hollow spool top coordinates with the control cover plate, control cover plate upper end connection valve gap, installation position displacement sensor on valve gap is being controlled cover plate side installation pilot-actuated valve; Be processed with semi-circular hole on the spool bottom port; Be processed with the waist shaped hole of four symmetries on valve pocket.
Summary of the invention
The purpose of this invention is to provide pressure and range of flow adjustable membrane valve, further accurately controlling of membrane valve created conditions realizing.
Realize that goal of the invention measure of the present invention is: comprise valve body, spool, spring, neck shell, control liquid interface, control chamber, front pressure transducer, top cover, diaphragm, valve pocket, valve signal processing unit, rear pressure transducer and valve control unit; Pressure transducer before liquid-inlet place's installation in valve pocket, perhaps, pressure transducer after liquid outlet is installed in valve pocket, front pressure transducer or be connected pressure transducer and be connected with the valve signal processing unit, control unit is installed on valve body, this control unit is connected by the control chamber connecting tube with control chamber, this control unit is connected with the valve pocket entrance by water source tube, this control unit also is connected with discharge tube, and simultaneously, control unit and valve signal processing unit have electrical connection.
The invention has the advantages that, setting pressure sensor on valve body, and connection valve gate signal processing unit or control unit, Real-Time Monitoring or regulation and control valve pocket are by flow and the pressure of liquid, can realize that the high-precision linear of small flow controls, practicality simple for structure, control efficiency is high, production, convenient operating maintenance, purposes is wide, and economic benefit and social benefit are remarkable.
Description of drawings
Fig. 1 is the structural representation of embodiment 1 in the present invention
Fig. 2 is pipeline transformational structure and the work schematic diagram of the control unit in embodiment 1 in the present invention
Fig. 3 is pipeline transformational structure and the work schematic diagram of the control unit in embodiment 2 in the present invention
Fig. 4 is pipeline transformational structure and the work schematic diagram of the control unit in embodiment 3 in the present invention
Fig. 5 is pipeline transformational structure and the work schematic diagram of the control unit in embodiment 4 in the present invention
Fig. 6 is pipeline transformational structure and the work schematic diagram of the control unit in embodiment 5 in the present invention
Reference character comprises: valve body 1, spool 2, spring 3, neck shell 4, control liquid interface 5, control chamber 6, front pressure transducer 7, jackscrew 9, top cover 10, diaphragm 11, valve pocket 12, valve signal processing unit 13, rear pressure transducer 14, control unit 15, water source tube 16, discharge tube 17, control chamber connecting tube 18.
Embodiment
The present invention mainly comprises valve body 1, spool 2, spring 3, neck shell 4, controls liquid interface 5, control chamber 6, front pressure transducer 7, top cover 10, diaphragm 11, valve pocket 12, valve signal processing unit 13, rear pressure transducer 14 and valve control unit 15; The interior upside of valve pocket 12 is installed spool 2, and neck shell 4 is arranged at valve body 1 top, and a concave groove is arranged at neck shell 4 tops, and this concave groove consists of control chambers 6 with top cover 10 inner chambers of the inside epirelief that is arranged on neck shell 4 tops, crimping diaphragm 11 between neck shell 4 end faces and top cover 10 bottom surfaces.
Below further illustrate by drawings and Examples.
embodiment 1: as shown in Figure 1, pressure transducer 7 before the place's installation of the interior liquid-inlet of valve pocket 12, perhaps, pressure transducer 14 after the interior liquid outlet of valve pocket 12 is installed, front pressure transducer 7 or be connected pressure transducer 14 and be connected with valve signal processing unit 13, control unit 15 is installed on valve body 1, this control unit 15 is connected by control chamber connecting tube 18 with control chamber 6, this control unit 15 is connected with valve pocket 12 entrances by water source tube 16, this control unit 15 also is connected with discharge tube 17, simultaneously, control unit 15 has electrical connection with valve signal processing unit 13.
In aforementioned, there is valve pocket 12 valve body 1 inside, the interior upside of valve pocket 12 is installed spool 2, neck shell 4 is arranged at valve body 1 top, neck shell 4 internal upper parts have spool 2, and spool 2 is fixedly connected with diaphragm 11, and the annular section of spool 2 bottoms and valve pocket 12 forms the shutoff end face of valve, diaphragm 11 tops consist of control chambers 6 with top cover 10 inner chambers that are arranged on neck shell 4 tops, crimping diaphragm 11 between neck shell 4 end faces and top cover 10 bottom surfaces.
In aforementioned, pressure transducer 7 before install at the interior liquid-inlet of valve pocket 12 place, pressure transducer 14 after the interior liquid outlet of valve pocket 12 is installed, this two pressure transducer respectively be installed on valve body 1 valve signal processing unit 13 outward and be connected.
In aforementioned, control unit 15 is connected respectively control chamber connecting tube 18, water source tube 16 and is connected connection with drain with the control chamber of controlling liquid interface 5.
In aforementioned, pressure transducer is directly installed in valve pocket 12, perhaps is connected in valve pocket 12 by conduit.Perhaps, take over by the side and be arranged on outside valve body 1.The discharge tube 17 of valve control unit 15 can directly connect atmosphere, also can be connected to the outlet of valve pocket 12.
In aforementioned, spool 2 connects top cover 10 by Compress Spring 3, and at the interior setting pressure sensor of valve pocket 12, this pressure transducer valve signal processing unit 13 outer with being installed on valve body 1 is connected.
In aforementioned, valve signal processing unit 13 is based on the programming device of digital circuit, revises setting pressure or the flow of valve by signal processing unit 13; Simultaneously, remotely carry out pressure setting by electrical signal by valve signal processing unit 13, sort signal can be analogue signal or digital communication signal.
In aforementioned, electronic circuit in valve signal processing unit 13 detects the pressure of valve pocket 12 outlets or entrance and compares with setting value, change the water (flow) direction of turnover valve control chamber 6 when finding deviation greater than claimed range by control unit (15), accurately control spool 2 positions to change the inner water-holding quantity of control chamber 6, thereby and then after realizing the size variation control valve of valve pocket 12 interior sprues or the front pressure of valve or the flow of the valve body 1 of flowing through.
In aforementioned, valve control unit 15 adopts electromagnetic coil to drive or micromachine drives, and can adopt multiple principle to realize the gating of convection cell, thereby realizes the control to valve opening.
In aforementioned, valve signal processing unit 13 is fixed on valve body 1, perhaps, is independent of the outer installation of valve body 1, perhaps, installs with the pressure transducer disjunctor.
In aforementioned, valve control unit 15 and signal processing unit 13 are arranged on outside valve body 1, and perhaps, valve control unit 15 and signal processing unit 13 are the part of valve 1.
In the present embodiment, electronic circuit in valve signal processing unit 13 detects the pressure of valve pocket 12 outlets or entrance and compares with setting value, change the water (flow) direction of turnover valve control chamber 6 when finding deviation greater than claimed range by control unit 15, thereby changing the inner water-holding quantity of control chamber 6 with accurate control spool 2 linear displacement positions, thereby after realizing the size control valve of valve pocket 12 sprues or the pressure before valve or the flow of the valve body 1 of flowing through.
In the present embodiment, if when only be used for adjusting upstream pressure, pressure transducer 7 before valve pocket 12 ingress can only be installed; If when only being used for adjusting downstream pressure, the rear pressure transducer 14 in valve pocket 12 outlet ports can only be installed.
In the present embodiment, as shown in Figure 2, the pipeline transformational structure of control unit 15 comprises an inner chamber and the conversion core that is installed in inner chamber, this inner chamber is communicated with respectively water source tube 16, discharge tube 17 and manages 18, and especially, this intracavity space is cylinder or prismatic, on the axis of its length direction, two ends are communicated with respectively water source tube 16 and discharge tube 17, control chamber connecting tube 18 be communicated with water source tube 16 incoming ends side, simultaneously, described conversion core connects Returnning spring or magnetic force resetting device in inner chamber.In when work, state 1 time, stop up inner chamber at Returnning spring pushing tow conversion core and support that to the outlet of discharge tube 17 discharge tube 17 is normally closed, at this moment control chamber connecting tube 18 arrives the pipeline conducting of water source tube 16 by inner chamber; State 2 times, by electromagnetic force, overcome action of reset spring, the conversion core stops up inner chamber to the outlet of water source tube 16, at this moment control chamber connecting tube 18 by inner chamber arrive discharge tube 17 the pipeline conducting.
embodiment 2: in embodiment 1, especially as shown in Figure 3, the pipeline transformational structure of control unit 15 comprises an inner chamber and the conversion core that is installed in inner chamber, this inner chamber is communicated with respectively water source tube 16, discharge tube 17 and control chamber connecting tube 18, especially, conversion core middle part is hingedly mounted on this internal chamber wall, simultaneously, water source tube 16, discharge tube 17 and control chamber connecting tube 18 access inner chamber side by side in the same side, conversion core middle part articulating point is arranged in control chamber connecting tube 18 on the interface axis of inner chamber, control chamber connecting tube 18 is often opened, in articulating point both sides, one obstruction face is arranged respectively on the conversion core, this 2 obstruction face respectively with water source tube 16 and discharge tube 17 interface in inner chamber along coordinating, simultaneously, described conversion core is installed the electromagnetism executor in inner chamber.In when work, state 1 time, by electromagnetic force, conversion core one end stops up inner chamber to the outlet of water source tube 16, at this moment control chamber connecting tube 18 by inner chamber arrive discharge tube 17 the pipeline conducting; State 2 times, by electromagnetic force, conversion core one end stops up inner chamber to the outlet of discharge tube 17, and control chamber connecting tube 18 arrives the pipeline conducting of water source tube 16 by inner chamber.
Embodiment 3: in embodiment 1, especially as shown in Figure 4, the pipeline transformational structure of control unit 15 be coaxial mounted connection control chamber connecting tube 18 the conversion core that connects dish, middle part hollow out be connected the joint chair that connects water source tube 16, discharge tube 17, described conversion core is installed the electromagnetism executor.In when work, state 1 time, by electromagnetic force, the interface of water source tube 16 is stopped up in the rotation of conversion core, at this moment manage 18 by conversion core middle part hollow out to discharge tube 17 the pipeline conducting; State 2 times, by electromagnetic force, the interface of discharge tube 17 is stopped up in the rotation of conversion core, and water source tube 16 is by the pipeline conducting of conversion core middle part hollow out to control chamber connecting tube 18.
Embodiment 4: in embodiment 1, especially as shown in Figure 5, the pipeline transformational structure of control unit 15 is a joint chair, and the conversion core that a middle part partially perforation is installed in this coaxial socket in joint chair middle part, the inner radial of this joint chair has 3 and connects respectively water source tube 16, discharge tube 17 and control chamber connecting tube 18 attachment holes, and described conversion core has the motorized motions rotation.In when work, state 1 time, the interface of water source tube 16 is stopped up in the rotation of conversion core, at this moment control chamber connecting tube 18 by conversion core middle part hollow out to discharge tube 17 the pipeline conducting; State 2 times, the interface of discharge tube 17 is stopped up in the rotation of conversion core, and water source tube 16 is by the pipeline conducting of conversion core middle part hollow out to control chamber connecting tube 18.
Embodiment 5: in embodiment 1, especially as shown in Figure 6, the pipeline transformational structure of control unit 15 is the joint chair that a middle part axially connects, and the conversion core that the local outer rim in middle part of coaxial installation is slotted in the middle part of this joint chair, the outer wall of this joint chair has 3 and connects respectively water source tube 16, discharge tube 17 and control chamber connecting tube 18 attachment holes, and described conversion core has motorized motions rotation or feeding.In when work, state 1 time, the conversion core stops up the interface of water source tube 16, at this moment control chamber connecting tube 18 by the conversion outer core slot discharge tube 17 the pipeline conducting; State 2 times, the conversion core stops up the interface of discharge tube 17, and water source tube 16 is by the slot pipeline conducting of control chamber connecting tube 18 of conversion outer core.
In above embodiment, do not reach the safety of narration, and mounting technique, and the employing prior aries such as other necessary technologies that relate to enforcement, enumerate no longer successively detailed description.
Claims (8)
- pressure and range of flow adjustable membrane valve, comprise valve body (1), spool (2), spring (3), neck shell (4), control liquid interface (5), control chamber (6), front pressure transducer (7), top cover (10), diaphragm (11), valve pocket (12), valve signal processing unit (13), rear pressure transducer (14) and valve control unit (15), it is characterized in that, pressure transducer (7) before liquid-inlet place's installation in valve pocket (12), perhaps, pressure transducer (14) after liquid outlet is installed in valve pocket (12), front pressure transducer (7) or be connected pressure transducer (14) and be connected with valve signal processing unit (13), at the upper control unit (15) of installing of valve body (1), this control unit (15) is connected by control chamber connecting tube (18) with control chamber (6), this control unit (15) is connected with valve pocket (12) entrance by water source tube (16), this control unit (15) also is connected with discharge tube (17), simultaneously, control unit (15) has electrical connection with valve signal processing unit (13).
- Pressure as claimed in claim 1 and range of flow adjustable membrane valve, it is characterized in that, spool (2) connects top cover (10) by Compress Spring (3), setting pressure sensor in valve pocket (12), this pressure transducer valve signal processing unit (13) outer with being installed on valve body (1) is connected.
- Pressure as claimed in claim 1 and range of flow adjustable membrane valve, it is characterized in that, pressure transducer (7) before liquid-inlet place's installation in valve pocket (12), pressure transducer (14) after liquid outlet is installed in valve pocket (12), this two pressure transducer the valve signal processing unit (13) outer with being installed on valve body (1) respectively are connected.
- Pressure as claimed in claim 1 and range of flow adjustable membrane valve, it is characterized in that, valve signal processing unit (13) is based on the programming device of digital circuit, revises setting pressure or the flow of valve by signal processing unit (13); Simultaneously, remotely carry out pressure setting by electrical signal by valve signal processing unit (13), sort signal can be analogue signal or digital communication signal.
- pressure as claimed in claim 1 and range of flow adjustable membrane valve, it is characterized in that, electronic circuit in valve signal processing unit (13) detects the pressure of valve pocket (12) outlet or entrance and compares with setting value, change the water (flow) direction of turnover valve control chamber (6) when finding deviation greater than claimed range by control unit (15), accurately control spool (2) position to change the inner water-holding quantity of control chamber (6), and then realize valve pocket (12) thus after the size variation control valve of interior sprue or valve before pressure or the flow of the valve body of flowing through (1).
- Pressure as claimed in claim 1 and range of flow adjustable membrane valve, it is characterized in that, valve control unit (15) adopts electromagnetic coil to drive or micromachine drives, and can adopt multiple principle to realize the gating of convection cell, thereby realizes the control to valve opening.
- Pressure as claimed in claim 1 and range of flow adjustable membrane valve, it is characterized in that, valve control unit (15) and signal processing unit (13) are arranged on outside valve body (1), perhaps, valve control unit (15) and signal processing unit (13) are the part of valve (1).
- Pressure as claimed in claim 1 and range of flow adjustable membrane valve, it is characterized in that, the discharge tube (17) of valve control unit (15) directly connects atmosphere, or is connected to the outlet of valve pocket (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100474978A CN103174868A (en) | 2013-02-06 | 2013-02-06 | Diaphragm valve with adjustable pressure and adjustable flow range |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100474978A CN103174868A (en) | 2013-02-06 | 2013-02-06 | Diaphragm valve with adjustable pressure and adjustable flow range |
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| Publication Number | Publication Date |
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| CN103174868A true CN103174868A (en) | 2013-06-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100474978A Pending CN103174868A (en) | 2013-02-06 | 2013-02-06 | Diaphragm valve with adjustable pressure and adjustable flow range |
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| CN (1) | CN103174868A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105204467A (en) * | 2015-09-24 | 2015-12-30 | 天津商安科技有限公司 | Low-energy-consumption water resource monitoring system based on technology of Internet of things |
| CN105849391A (en) * | 2013-12-20 | 2016-08-10 | 埃迈海卓尼克工程国际有限责任公司 | A valve and a method of controlling a valve in a fluid conduit |
| CN106015718A (en) * | 2016-06-06 | 2016-10-12 | 淮南市鸿裕工业产品设计有限公司 | Thermal efficiency loss reduction control device of hydraulic control valve |
| CN106609879A (en) * | 2015-10-27 | 2017-05-03 | 现代自动车株式会社 | Diaphragm valve for vehicle |
| CN107327619A (en) * | 2017-01-19 | 2017-11-07 | 王大海 | Booster type valve mechanism and the control method of keying |
| CN107532994A (en) * | 2015-03-05 | 2018-01-02 | 韩国标准科学研究院 | Include the measurement apparatus of the high sensitivity light absorption units for micro-example |
| CN108591582A (en) * | 2018-07-16 | 2018-09-28 | 沪消消防科技有限公司 | Simple type preaction valve installation |
| CN108591583A (en) * | 2018-07-16 | 2018-09-28 | 沪消消防科技有限公司 | Single valve formula preaction valve installation |
| CN110145621A (en) * | 2019-05-08 | 2019-08-20 | 承德高中压阀门管件集团有限公司 | A kind of pilot operated safety valve |
| CN112460268A (en) * | 2020-11-25 | 2021-03-09 | 宁波方太厨具有限公司 | Proportional valve and gas water heater comprising same |
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| JP2005083502A (en) * | 2003-09-09 | 2005-03-31 | Sogo Pump Seisakusho:Kk | Pressure reducing valve device |
| CN101280856A (en) * | 2008-04-09 | 2008-10-08 | 曾祥炜 | Non- motile shuttle control regulation valve |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105849391A (en) * | 2013-12-20 | 2016-08-10 | 埃迈海卓尼克工程国际有限责任公司 | A valve and a method of controlling a valve in a fluid conduit |
| US10619757B2 (en) | 2013-12-20 | 2020-04-14 | Imi Hydronic Engineering International Sa | Valve and a method of controlling a valve in a fluid conduit |
| CN107532994A (en) * | 2015-03-05 | 2018-01-02 | 韩国标准科学研究院 | Include the measurement apparatus of the high sensitivity light absorption units for micro-example |
| CN105204467A (en) * | 2015-09-24 | 2015-12-30 | 天津商安科技有限公司 | Low-energy-consumption water resource monitoring system based on technology of Internet of things |
| CN106609879A (en) * | 2015-10-27 | 2017-05-03 | 现代自动车株式会社 | Diaphragm valve for vehicle |
| CN106609879B (en) * | 2015-10-27 | 2020-07-03 | 现代自动车株式会社 | Diaphragm valve for vehicle |
| CN106015718A (en) * | 2016-06-06 | 2016-10-12 | 淮南市鸿裕工业产品设计有限公司 | Thermal efficiency loss reduction control device of hydraulic control valve |
| CN107327619A (en) * | 2017-01-19 | 2017-11-07 | 王大海 | Booster type valve mechanism and the control method of keying |
| CN107327619B (en) * | 2017-01-19 | 2024-04-12 | 王大海 | Power-assisted valve structure and opening and closing control method |
| CN108591582A (en) * | 2018-07-16 | 2018-09-28 | 沪消消防科技有限公司 | Simple type preaction valve installation |
| CN108591583A (en) * | 2018-07-16 | 2018-09-28 | 沪消消防科技有限公司 | Single valve formula preaction valve installation |
| CN110145621A (en) * | 2019-05-08 | 2019-08-20 | 承德高中压阀门管件集团有限公司 | A kind of pilot operated safety valve |
| CN112460268A (en) * | 2020-11-25 | 2021-03-09 | 宁波方太厨具有限公司 | Proportional valve and gas water heater comprising same |
| CN112460268B (en) * | 2020-11-25 | 2022-03-08 | 宁波方太厨具有限公司 | Proportional valve and gas water heater comprising same |
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Application publication date: 20130626 |