CN102313065A - Pneumatic proportion regulator based on electromagnetic valve array - Google Patents

Pneumatic proportion regulator based on electromagnetic valve array Download PDF

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Publication number
CN102313065A
CN102313065A CN201110205797A CN201110205797A CN102313065A CN 102313065 A CN102313065 A CN 102313065A CN 201110205797 A CN201110205797 A CN 201110205797A CN 201110205797 A CN201110205797 A CN 201110205797A CN 102313065 A CN102313065 A CN 102313065A
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China
Prior art keywords
solenoid valve
battle array
valve body
air inlet
main valve
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CN201110205797A
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CN102313065B (en
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左建勇
罗卓军
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Tongji University
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Tongji University
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Abstract

The invention discloses a pneumatic proportion regulator based on an electromagnetic valve array, which comprises a main valve body, an upper end cover, a lower end cover, an air inlet electromagnetic valve array and an air outlet electromagnetic valve array, wherein an air cavity, an air inlet air path and an exhaust air path which are mutually separated and independent are arranged in the main valve body, the top of the main valve body is provided with a pressure sensor and a circuit board, in addition, the upper end cover is arranged on the top of the main valve body for accommodating the pressure sensor and the circuit board, the bottom of the main valve body is provided with the lower end cover, the left side and the right side of the main valve body are respectively provided with the air inlet electromagnetic valve array and the air outlet electromagnetic valve array, and the front side of the main valve body is provided with a first interface and a second interface which are respectively communicated with the air inlet air path and the air cavity. The pneumatic proportion regulator has the advantages that the control is flexible and variable, the fault redundancy is realized, the large-through-diameter and high-flow-rate air supply is realized, and simultaneously, the ideal response performance can be ensured.

Description

A kind of pneumatic proportional controlling device based on the solenoid valve battle array
Technical field
The invention belongs to the pneumatics field, relate to a kind of pneumatic proportional controlling device, especially a kind of pneumatic proportional controlling device based on the solenoid valve battle array.
Background technique
The speed of response of big bare sizing electro-magnetic valve is generally slow in the market, and for air-operated solenoid valve, more little its speed of response of latus rectum is fast more.Though the speed of response of middle or small bare sizing electro-magnetic valve is than very fast, middle or small bare sizing electro-magnetic valve can not satisfy the requirement of big flow.Press in the practical applications and a kind ofly can realize that big flow supplies exhaust, possesses the pneumatic proportional controlling device of good response performance simultaneously again.
Summary of the invention
The purpose of this invention is to provide a kind of pneumatic proportional controlling device based on the solenoid valve battle array, when can realizing that big flow supplies exhaust, again can the fast-response control command request.
For reaching above purpose, the solution that the present invention adopted is:
A kind of pneumatic proportional controlling device based on the solenoid valve battle array; It comprises main valve body, upper end cap, lower end cap, air inlet solenoid valve battle array and the solenoid valve battle array of giving vent to anger; Be provided with mutual separation independently air cavity, air inlet gas circuit and exhaust gas circuit in the main valve body; The main valve body top is equipped with pressure transducer and circuit board, and upper end cap is installed on the main valve body top pressure transducer, circuit board are contained in wherein; Lower end cap is installed in the main valve body bottom; The main valve body left and right sides is installed into pneumoelectric magnet valve battle array respectively and gives vent to anger the solenoid valve battle array; The main valve body front side is provided with first interface, second interface that is communicated with respectively separately with air inlet gas circuit and air cavity.
Said air inlet solenoid valve battle array comprises the solenoid valve of at least two kinds of latus rectums, two gas port connections that each solenoid valve and main valve body left side are offered, and one of them gas port is connected with air cavity, and another gas port is connected with the air inlet gas circuit;
Said exhaust solenoid valve battle array comprises the solenoid valve of at least two kinds of latus rectums, two gas port connections that each solenoid valve and main valve body right side are offered, and one of them gas port is connected with air cavity, and another gas port is connected with the exhaust gas circuit.
Said first interface that is communicated with the air inlet gas circuit is connected with external source of air; Said second interface that is communicated with air cavity is connected with final controlling element.
Said air inlet gas circuit and exhaust gas circuit all adopt " U " type structure, and " U " type end all is pressed in air inlet gas circuit or the exhaust gas circuit with the mode of steel ball with interference fit.
The said gas port that is connected with the exhaust gas circuit is communicated with outside atmosphere through silencing apparatus.
Be provided with between said main valve body and the lower end cap and prevent the rubber seal of leaking gas.
Said main valve body is provided with the mounting hole that communicates with air cavity, and pressure transducer is installed in this mounting hole, and with the pressure transducer compressing tablet it is fixed, and is processed with two apertures on the pressure transducer compressing tablet back side of pressure transducer and atmosphere are linked up.
Said circuit board comprises power module, acquisition module and Executive Module, and power module changes into behind the needed voltage solenoid valve in air inlet solenoid valve battle array and exhaust solenoid valve battle array again with the supply voltage of input; Pressure signal in the air cavity that the processing pressure sensor acquisition that is used for acquisition module arrives, the control that is used to Executive Module provides foundation; Executive Module is according to the given control signal in the external world and pressure signal control air inlet solenoid valve battle array that acquisition module collected, the switching of solenoid valve in the exhaust solenoid valve battle array.
The control signal of said Executive Module is through introducing a control signal line, with the form transfer control signal of PWM ripple; Or, adopt the analogue signal transfer mode through introducing two control signal lines; Or wireless communication function is integrated on the Executive Module, with the pattern transfer control signal of wireless telecommunications.
Owing to adopted such scheme, the present invention to have following characteristics: 1, can on the basis that guarantees big flow confession exhaust, realize speed of response faster; 2, solenoid valve adopts redundant design method, and the fault of one or more solenoid valves can't influence the realization of the function of package unit; 3, can make the control strategy of goal pressure adjusting, Flow-rate adjustment, response time adjusting etc. become versatile and flexible through adopt different solenoid valves to open and close combination constantly in difference; 4, circuit board systems is installed in the upper surface of main valve body intensively, and can adopt multiple mode transfer control signal.
Description of drawings
A kind of pneumatic proportional controlling device explosive view of Fig. 1 based on the solenoid valve battle array.
A kind of pneumatic proportional controlling device assembling schematic representation of Fig. 2 based on the solenoid valve battle array.
Fig. 3 main valve body cut-away illustration.
A kind of pneumatic proportional controlling device circuit board systems principle of Fig. 4 based on the solenoid valve battle array.
Embodiment
Below in conjunction with the accompanying drawing illustrated embodiment the present invention is further described.
Shown in Fig. 1-3; A kind of pneumatic proportional controlling device based on the solenoid valve battle array comprises component parts such as upper end cap 2, main valve body 18, lower end cap 14, air inlet solenoid valve battle array, exhaust solenoid valve battle array, first quick inserting joint 11, second quick inserting joint 12, silencing apparatus 10, pressure transducer 5, pressure transducer compressing tablet 4, circuit board 6, rubber seal 13.Said main valve body 18 left and right two surfaces are installed into inflation and the exhaust that pneumoelectric magnet valve battle array and exhaust solenoid valve battle array are used for air cavity 25 respectively; Wherein air inlet solenoid valve battle array comprises big bare sizing electro-magnetic valve 15, middle bare sizing electro- magnetic valve 16 and 17 3 kinds of solenoid valves of little bare sizing electro-magnetic valve; Every kind of solenoid valve all is provided with two totally 6 compositions; The exhaust solenoid valve battle array comprises big bare sizing electro-magnetic valve 9, middle bare sizing electro- magnetic valve 8 and 7 three kinds of solenoid valves of little bare sizing electro-magnetic valve; Every kind of solenoid valve all is provided with two totally 6 compositions, that the latus rectum of three pairs of solenoid valves of each solenoid valve battle array is followed successively by from top to bottom is little, in, big.Connect with four screws between main valve body 18 and the upper end cap 2, seal in case leak-stopping gas with a rubber seal 13 with between six screws connections and they between main valve body 18 and the lower end cap 14.The front surface of main valve body 18 is equipped with first quick inserting joint 11, second quick inserting joint 12 and a silencing apparatus 10 with the mode of screw thread, and wherein first quick inserting joint 11 is installed on the air inlet gas circuit 34, is used to link up extraneous pressure air source; Second quick inserting joint 12 is installed on the final controlling element connection mouth 27; Be used to connect final controlling element; Final controlling element can be the executive component that cylinder etc. drives with pressure air, pressure air after final controlling element connection mouth 27 gets into final controlling element through driving the effect that piston the cylinder can apply power to external world; Silencing apparatus 10 is installed on the exhaust gas circuit 22, and effect is to reduce exhaust sound during toward atmospheric exhaust at air cavity 25.The upper surface of main valve body 18 is equipped with pressure transducer 5 and circuit board 6; Pressure transducer 5 is installed on the pressure transducer mounting hole 35; And with pressure transducer compressing tablet 4 it is fixed, be processed with two apertures on the pressure transducer compressing tablet 4 and be used to make the back side and the atmosphere of pressure transducer 5 to link up to guarantee the pressure transducer 5 can proper functioning; Two hexagon socket cap head screws of circuit board 6 usefulness are connected with the circuit board screw mounting hole, and circuit board can be divided into power module, acquisition module and Executive Module.Pressure transducer 5 and circuit board 6 are covered it by upper end cap 2; Air inlet solenoid valve battle array wire terminal 19, the wire terminal 1 of exhaust solenoid valve battle array and power line and control signal wire terminal 3 are installed on three side faces of upper end cap 2, and the driving electric wire 21,20 of inlet and outlet solenoid valve battle array, the power line of circuit board and extraneous control signal line all can be connected on the circuit board through these several joints.Left and right two surfaces of main valve body 18 are separately installed with air inlet solenoid valve battle array and exhaust solenoid valve battle array, these two solenoid valve battle arrays all by three couple with large, medium and small three kinds of latus rectums totally six two-position two-way solenoid valves form.
Be processed with an air cavity 25 in the middle of the said main valve body 18, air cavity 25 plays the effect of buffering in inflation and exhaust process, avoid the cataclysm of air pressure; The both sides of air cavity 25 are processed with air inlet gas circuit 34 and exhaust gas circuit 22; The shape of these two gas circuits is " U " type to make full use of the main valve body space; The end of air inlet gas circuit is pressed in the gas circuit with steel ball 28,29 modes with interference fit in case leak-stopping gas, and the exhaust gas circuit is also done identical setting; The left and right surfaces of main valve body 18 all is processed with the installation gas port of solenoid valve, and the solenoid valve of each bi-bit bi-pass is to there being two gas port is installed, and therefore, respectively there are 12 gas ports on left and right two surfaces; The upper surface of main valve body 18 is processed with a pressure transducer mounting hole 35, and this hole is common to the pressure signal of gathering in the air cavity mutually with air cavity 25.
Each solenoid valve in the air inlet solenoid valve battle array all has two air inlet solenoid valves that gas port is installed; Gas port 30,31,32 as shown in Figure 3; One of them gas port communicates with air inlet gas circuit 34; Another gas port communicates with air cavity 25, is whether may command is to air cavity 25 inflations through the switching of controlling two-position two-way solenoid valve; Each solenoid valve in the exhaust solenoid valve battle array also all has two exhaust solenoid valves that gas port is installed; Gas port 23,24,26 as shown in Figure 3; One of them gas port communicates with exhaust gas circuit 22; Another gas port communicates with air cavity 25, is whether may command air cavity 25 is to atmospheric exhaust through the switching of controlling two-position two-way solenoid valve.
Described pressure transducer 5 has been formed entire circuit plate system with circuit board 6, wherein comprises three modules on the circuit board 6, is respectively power module, acquisition module and Executive Module.Power module is by the power line power supply of introducing from power line and control signal wire terminal 3, and power module changes into behind the needed voltage solenoid valve in air inlet solenoid valve battle array and exhaust solenoid valve battle array again through the supply voltage with input; Acquisition module is used for the pressure signal in the air cavity 25 that processing pressure sensor 5 collects, and the control that is used to Executive Module provides foundation; The guide line that Executive Module is drawn through air inlet solenoid valve battle array wire terminal 19, exhaust solenoid valve battle array wire terminal 1 place according to the given control signal in the external world and pressure signal that acquisition module collected is controlled the switching of the solenoid valve in the inlet and outlet solenoid valve battle array.
The control signal of said Executive Module is provided by the external operation person, and the operator both can introduce a control signal line through power line and control signal wire terminal 3, with the form transfer control signal of PWM ripple; Also can introduce two control signal lines, adopt the analogue signal transfer mode: like voltage signal, current signal etc. through power line and control signal wire terminal 3; Can also wireless communication function be integrated on the Executive Module, with the pattern transfer control signal of wireless telecommunications.
The circuit board systems of pressure transducer 5 and circuit board 6 compositions, its schematic diagram is as shown in Figure 4, and circuit board systems is made up of power module, acquisition module, Executive Module, and wherein power module is accomplished the conversion of DC24V to DC5V, and is provided with the power supply Anti-interference Design.Acquisition module comprises instruction demodulation, wireless transmission unit, pressure transducer, temperature correction composition.The instruction demodulation is used for the control command that send the outside is carried out demodulation, and control command can be the dummy instruction of voltage or current forms, also can be the digital command of PWM form; Wireless transmission unit is used for receiving the wireless digital instruction that the external wireless transmitting element sends over; Pressure transducer is used for the size of monitoring objective pressure; Temperature correction is used for the error that causes because of environmental change of compensating-pressure transducer.Executive Module comprises that processor and multichannel drive: processor is based on embedded type CPU such as ARM or single-chip microcomputer etc.; Select Different control strategy and algorithm according to source of the gas characteristics, goal pressure, response demand, electromagnetism fault state, and solenoid valve is controlled through the driving of satisfying the need.
Working principle of the present invention: the pressure air of pressure air source is from 11 inputs of first quick inserting joint, and the air inlet solenoid valve that arrives air inlet solenoid valve battle array through air inlet gas circuit 34 is installed the gas port place; And thereby the effect of exhaust gas circuit 22 is exhaust solenoid valve to be installed that gas port of communicating with exhaust gas circuit 22 in the gas port 23,24,26 make itself and atmosphere discharged air through silencing apparatus 10.The extraneous control signal line of control signal in power line and control signal wire terminal 3 is delivered to the Executive Module on the circuit board 6, and Executive Module obtains instructing the back earlier the corresponding expection air pressure of air pressure and instruction in the air cavity 25 that this moment, pressure transducer 5 fed back to be compared.If the air pressure that feeds back equates with the expection air pressure basically; All closed electromagnetic valves in the Executive Module air inlet solenoid valve battle array electric wire 21 of drawing through inlet and outlet solenoid valve battle array wire terminal 19,1 and exhaust solenoid valve battle array electric wire 20 control air inlet solenoid valve battle arrays and the exhaust solenoid valve battle array then; The then air pressure pressurize in the air cavity 25 is because air cavity 25 is connected with final controlling element thereby also pressurize of final controlling element through the final controlling element connection mouth.If the air pressure that feeds back is littler than the expection air pressure, then the Executive Module air inlet solenoid valve battle array electric wire 21 of drawing through air inlet solenoid valve battle array wire terminal 19 earlier all air inlet solenoid valves of control open or have only two big latus rectum air inlet solenoid valves 15 to open; The air pressure that feeds back at pressure transducer 5 is during near the air pressure of expection; All big latus rectum air inlet solenoid valves 15 of Executive Module control cut out; And middle or small latus rectum air inlet solenoid valve 16,17 perhaps has only little latus rectum air inlet solenoid valve 17 to open, and equates then used air inlet closed electromagnetic valve with the air pressure of expection up to the air pressure that feeds back; Executive Module is closed through all exhaust solenoid valves of exhaust solenoid valve battle array electric wire 20 controls in the whole process.If the air pressure that feeds back is bigger than the expection air pressure, then the Executive Module exhaust solenoid valve battle array electric wire 20 of drawing through exhaust solenoid valve battle array wire terminal 1 earlier all exhaust solenoid valves of control open or have only two big latus rectum exhaust solenoid valves 9 to open; The air pressure that feeds back at pressure transducer 5 is during near the air pressure of expection; All big latus rectum exhaust solenoid valves 9 of Executive Module control are closed; And middle or small latus rectum exhaust solenoid valve 7,8 or have only little latus rectum exhaust solenoid valve 7 to open equates with the air pressure of expection that up to the air pressure that feeds back then used exhaust solenoid valve closes; Executive Module is through all air inlet closed electromagnetic valves of air inlet solenoid valve battle array electric wire 21 controls in the whole process.No matter intake process or exhaust process; All being employed in the starting stage opens big bare sizing electro- magnetic valve 15,9 earlier; When the approaching expection of the air pressure that feeds back air pressure, use middle or small bare sizing electro- magnetic valve 16,17,8,7 these control strategies; Make whole device can realize that big latus rectum supplies the function of exhaust, has response performance preferably again.
If large, medium and small three kinds of latus rectums of solenoid valve are designated as R respectively 1, R 2, R 3, then the equivalent maximum diameter of this device can be pressed R Ref = R 1 2 + R 2 2 + R 3 2 Estimation.
And the fastest response time of this device just equals the response time of minimum bare sizing electro- magnetic valve 17,7.
Above-mentioned description to embodiment is can understand and use the present invention for ease of the those of ordinary skill of this technical field.The personnel of skilled obviously can easily make various modifications to these embodiments, and needn't pass through performing creative labour being applied among other embodiments in the General Principle of this explanation.Therefore, the invention is not restricted to the embodiment here, those skilled in the art should be within protection scope of the present invention for improvement and modification that the present invention makes according to announcement of the present invention.

Claims (9)

1. pneumatic proportional controlling device based on the solenoid valve battle array; It is characterized in that: it comprises main valve body, upper end cap, lower end cap, air inlet solenoid valve battle array and the solenoid valve battle array of giving vent to anger; Be provided with mutual separation independently air cavity, air inlet gas circuit and exhaust gas circuit in the main valve body; The main valve body top is equipped with pressure transducer and circuit board, and upper end cap is installed on the main valve body top pressure transducer, circuit board are contained in wherein; Lower end cap is installed in the main valve body bottom; The main valve body left and right sides is installed into pneumoelectric magnet valve battle array respectively and gives vent to anger the solenoid valve battle array; The main valve body front side is provided with first interface, second interface that is communicated with respectively separately with air inlet gas circuit and air cavity.
2. the pneumatic proportional controlling device based on the solenoid valve battle array as claimed in claim 1 is characterized in that:
Said air inlet solenoid valve battle array comprises the solenoid valve of at least two kinds of latus rectums, two gas port connections that each solenoid valve and main valve body left side are offered, and one of them gas port is connected with air cavity, and another gas port is connected with the air inlet gas circuit;
Said exhaust solenoid valve battle array comprises the solenoid valve of at least two kinds of latus rectums, two gas port connections that each solenoid valve and main valve body right side are offered, and one of them gas port is connected with air cavity, and another gas port is connected with the exhaust gas circuit.
3. the pneumatic proportional controlling device based on the solenoid valve battle array as claimed in claim 1 is characterized in that: said first interface that is communicated with the air inlet gas circuit is connected with external source of air; Said second interface that is communicated with air cavity is connected with final controlling element.
4. the pneumatic proportional controlling device based on the solenoid valve battle array as claimed in claim 1; It is characterized in that: said air inlet gas circuit and exhaust gas circuit all adopt " U " type structure, and " U " type end all is pressed in air inlet gas circuit or the exhaust gas circuit with the mode of steel ball with interference fit.
5. the pneumatic proportional controlling device based on the solenoid valve battle array as claimed in claim 2 is characterized in that: the said gas port that is connected with the exhaust gas circuit is communicated with outside atmosphere through silencing apparatus.
6. the pneumatic proportional controlling device based on the solenoid valve battle array as claimed in claim 1 is characterized in that: be provided with between said main valve body and the lower end cap and prevent the rubber seal of leaking gas.
7. the pneumatic proportional controlling device based on the solenoid valve battle array as claimed in claim 1; It is characterized in that: said main valve body is provided with the mounting hole that communicates with air cavity; Pressure transducer is installed in this mounting hole; And with the pressure transducer compressing tablet it is fixed, be processed with two apertures on the pressure transducer compressing tablet back side of pressure transducer and atmosphere are linked up.
8. the pneumatic proportional controlling device based on the solenoid valve battle array as claimed in claim 1; It is characterized in that: said circuit board comprises power module, acquisition module and Executive Module, and power module changes into behind the needed voltage solenoid valve in air inlet solenoid valve battle array and exhaust solenoid valve battle array again with the supply voltage of input; Pressure signal in the air cavity that the processing pressure sensor acquisition that is used for acquisition module arrives, the control that is used to Executive Module provides foundation; Executive Module is according to the given control signal in the external world and pressure signal control air inlet solenoid valve battle array that acquisition module collected, the switching of solenoid valve in the exhaust solenoid valve battle array.
9. the pneumatic proportional controlling device based on the solenoid valve battle array as claimed in claim 8 is characterized in that: the control signal of said Executive Module is through introducing a control signal line, with the form transfer control signal of PWM ripple; Or, adopt the analogue signal transfer mode through introducing two control signal lines; Or wireless communication function is integrated on the Executive Module, with the pattern transfer control signal of wireless telecommunications.
CN 201110205797 2011-07-21 2011-07-21 Pneumatic proportion regulator based on electromagnetic valve array Expired - Fee Related CN102313065B (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN 201110205797 CN102313065B (en) 2011-07-21 2011-07-21 Pneumatic proportion regulator based on electromagnetic valve array

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CN102313065B CN102313065B (en) 2013-07-17

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103226364A (en) * 2013-04-12 2013-07-31 华中科技大学 Air channel control device and air channel control system
CN105202252A (en) * 2015-10-12 2015-12-30 中国第一汽车股份有限公司无锡油泵油嘴研究所 Drive device of pneumatic proportional valve
CN104633221B (en) * 2013-11-12 2017-07-21 宁夏巨能机器人系统有限公司 A kind of plant equipment multidigit various way solenoid valve
CN109068862A (en) * 2016-04-27 2018-12-21 德斯坎萨雷睡眠实验室公司 Air flow controller
CN114787547A (en) * 2020-03-09 2022-07-22 金子产业株式会社 Electromagnetic valve

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CN1293329A (en) * 1999-10-18 2001-05-02 速睦喜股份有限公司 Electromagnetic valve manifold with power supply mechanism
US6354674B1 (en) * 1998-12-11 2002-03-12 Denso Corporation Hydraulic control apparatus integrated with motor driving circuit unit
CN1439830A (en) * 2002-02-20 2003-09-03 卡莫兹股份公司 Easily installing and maintaining air valve group
JP2006349042A (en) * 2005-06-15 2006-12-28 Smc Corp Multiple manifold type solenoid valve
CN1952454A (en) * 2005-08-12 2007-04-25 伊顿公司 Electro-hydraulic manifold assembly with mounted pressure sensors
CN201187616Y (en) * 2008-03-10 2009-01-28 周明华 Combined type electromagnetic valve plate

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Publication number Priority date Publication date Assignee Title
US6354674B1 (en) * 1998-12-11 2002-03-12 Denso Corporation Hydraulic control apparatus integrated with motor driving circuit unit
CN1293329A (en) * 1999-10-18 2001-05-02 速睦喜股份有限公司 Electromagnetic valve manifold with power supply mechanism
CN1439830A (en) * 2002-02-20 2003-09-03 卡莫兹股份公司 Easily installing and maintaining air valve group
JP2006349042A (en) * 2005-06-15 2006-12-28 Smc Corp Multiple manifold type solenoid valve
CN1952454A (en) * 2005-08-12 2007-04-25 伊顿公司 Electro-hydraulic manifold assembly with mounted pressure sensors
CN201187616Y (en) * 2008-03-10 2009-01-28 周明华 Combined type electromagnetic valve plate

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103226364A (en) * 2013-04-12 2013-07-31 华中科技大学 Air channel control device and air channel control system
CN104633221B (en) * 2013-11-12 2017-07-21 宁夏巨能机器人系统有限公司 A kind of plant equipment multidigit various way solenoid valve
CN105202252A (en) * 2015-10-12 2015-12-30 中国第一汽车股份有限公司无锡油泵油嘴研究所 Drive device of pneumatic proportional valve
CN105202252B (en) * 2015-10-12 2018-06-19 中国第一汽车股份有限公司无锡油泵油嘴研究所 A kind of driving device of pneumatic proportional valve
CN109068862A (en) * 2016-04-27 2018-12-21 德斯坎萨雷睡眠实验室公司 Air flow controller
CN109068862B (en) * 2016-04-27 2021-05-18 德斯坎萨雷睡眠实验室公司 Air flow control device
CN114787547A (en) * 2020-03-09 2022-07-22 金子产业株式会社 Electromagnetic valve
CN114787547B (en) * 2020-03-09 2024-04-23 金子产业株式会社 Electromagnetic valve

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