Electromagnetic measurement butterfly valve
Technical field
The present invention relates to valve and fluid metering technical field, particularly relate to a kind of electromagnetic measurement butterfly valve.
Background technique
Butterfly valve is the simple modulating valve of a kind of structure, the butterfly valve that can be used for the switch control rule of low pressure pipeline medium refers to that closure member (flap or butterfly plate) is disk, rotate a kind of valve reaching open and close around valve shaft, valve can be used for the flowing controlling all kinds fluids such as air, water, steam, various Korrosionsmedium, mud, oil product, liquid metal and radiating medium.On pipeline, main rising is cut off and throttling action.Butterfly valve open-shut device is a discoidal butterfly plate, rotates in valve body around the axis of himself, thus reaches the object opening and closing or regulate.
At present, most of butterfly valve is only used as to cut off in fluid circuit, the flow direction of cut-off and alter, but along with the development of valve industry, the function of dish valve is more and more difficult to the demand meeting market.In existing pipeline, valve and the flowmeter overwhelming majority are installed separately, and before and after the pipeline installing flowmeter, need to vacate the straight length of certain length or adopt other constant-current stabilizers, and when comparatively short pipeline needing to install dish valve and flowmeter more simultaneously, often be difficult to realize or propose high requirement to engineering, this mounting type is adopted also to need more pipe well for later maintenance, not only considerably increase engineering cost and labour cost, and maintenance cost is also higher.On the other hand, when the pipeline having installed dish valve needs to install flowmeter additional again, need buried pipeline to dig out, increase connected element after disconnection, as flange, to be increased in pipeline by flowmeter, great in constructing amount, engineering difficulty is large, and costly.
Summary of the invention
Object of the present invention be exactly to overcome that existing most of dish valve is only used as to cut off in fluid circuit, the flow direction of cut-off and alter, in pipeline, valve and the flowmeter overwhelming majority are the problems be installed separately, a kind of electromagnetic measurement butterfly valve is provided, it has and can either control fluid on-off, measurable flow body flow again, and do not affect by liquid, measuring accuracy is high, long service life, structure are simple, convenient for installation and maintenance feature.
For achieving the above object, the electromagnetic measurement butterfly valve designed by the present invention, comprises valve body, valve rod that butterfly plate, drive butterfly plate rotate and be located at the electric control box of valve body outside; Described butterfly plate is provided with the flow tube of the hollow parallel with its plate face, and when the position that described butterfly plate forwards to open, the arranged direction of described flow tube is consistent with treating the direction of fluid measured; Positioned opposite on the tube wall of described flow tube have electromagnetic induction coil and be arranged in the paired electrode in the magnetic field range of electromagnetic induction coil, and fluid flows through electromagnetic induction coil and electrode and produce induction current on electrode; Circuit board is provided with in described electric control box; Described electromagnetic induction coil to be electrically connected with circuit board by wire and to form closed-loop path; Described electrode is connected with circuit board by wire; Described circuit board is provided with the puocessing module by drawing fluid real-time traffic information to the induction current process of electrode.
When butterfly plate turns to valve opening state, fluid flows through flow tube, and electrode can produce induction current, and faradic size of current calculates and is converted into uninterrupted by puocessing module, draws fluid flow information now.
Further, described flow tube is embedded the central position being arranged in butterfly plate, and the central shaft of flow tube overlaps with the plate face of butterfly plate, and the plate face of butterfly plate is positioned at the two end part, outside of flow tube, the plate face of butterfly plate and the tube wall of flow tube one-body molded.
Further, described valve rod is provided with vertically the through hole being communicated with electric control box and electromagnetic induction coil; The wire via through holes of described electromagnetic induction coil is connected with circuit board.
Further, the driving mechanism of battery and actuate valve stem rotation is provided with in described electric control box; Described circuit board is provided with and controls the control module that driving mechanism performs corresponding operating; Described battery is electrically connected with described driving mechanism, circuit board.
The beneficial effect of above-mentioned further scheme is: control driving mechanism by control module and perform switch valve operation, realize the Automated condtrol to the open and close of dish valve.
Further, described control module is connected with described puocessing module communication, and described control module controls driving mechanism according to the fluid real-time traffic that puocessing module draws and performs corresponding operating.
The beneficial effect of above-mentioned further scheme is: by puocessing module being connected with control module, makes control module can control the open and close of butterfly plate according to the real-time traffic of fluids within pipes.
Further, described driving mechanism comprises drive motor, the gearbox be connected with drive motor axle, the gear train of being located at output shaft of gear-box; The driving wheel of described gear train and the output shaft of gearbox are fixed, and follower and valve rod are fixed.
Further, described circuit board is provided with the wireless communication module be connected with control module; Described electric control box is provided with the antenna for receiving and launch wireless communication signal, and described antenna is connected with wireless communication module.
The beneficial effect of above-mentioned further scheme is: by wireless communication module and antenna, can realize remote wireless control to control module, thus realizes controlled in wireless to the open and close of butterfly valve.
Further, be provided with the limit switch just drawing real-time traffic information for limiting puocessing module when butterfly plate turns to parallel with fluid flow direction in described electric control box, described limit switch is electrically connected with described puocessing module, control module.
The beneficial effect of above-mentioned further scheme is: by the effect of limit switch, only has and just carries out fluid measurement when butterfly plate turns to optimum position, makes measurement of fluid flow more accurate.
Further, described valve rod is from top to bottom arranged with and the bearing of valve body interference fit, spacer and oil sealing successively.
The beneficial effect of above-mentioned further scheme is: by arranging bearing between valve rod and valve body, and valve rod is rotated more laborsaving, number of revolutions is more, and working life extends.
Further, described electrode vertical is embedded in flow direction and is arranged on the relative sidewall of flow tube.
The beneficial effect of above-mentioned further scheme is: by electrode vertical when flow direction is arranged, and the induction current that electrode produces is the strongest.
The invention has the beneficial effects as follows: when butterfly plate turns to valve opening state, fluid flows through flow tube, and electrode can produce induction current, faradic size of current calculates and is converted into uninterrupted by puocessing module, draws fluid flow information now; Adopt electromagnetic measurement mode to measure fluid flow, measuring accuracy is high, solves the problem that in pipeline, valve and flowmeter are installed separately, reduces cost; According to the open and close valve of real-time traffic remote wireless control butterfly valve, the unified automatic management to pipeline, telecontrol and maintenance can also be applicable to.
Accompanying drawing explanation
Fig. 1 is the broken section structural representation under electromagnetic measurement dish valve valve opening state of the present invention.
Fig. 2 is the broken section structural representation under the dish of electromagnetic measurement shown in Fig. 1 valve close valve state.
Fig. 3 is the structure for amplifying schematic diagram of butterfly plate in Fig. 1.
In figure, 1. valve body; 2. butterfly plate; 3. valve rod; 4. electric control box; 5. circuit board; 6. puocessing module; 7. through hole; 8. electromagnetic induction coil; 9. battery; 10. control module; 11. drive motor; 12. gearboxes; 13. driving wheels; 14. followers; 15. wireless communication modules; 16. antennas; 17. limit switches; 18. bearings; 19. spacers; 20. oil sealings; 21. flow tubes; 22. electrodes.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
A kind of electromagnetic measurement butterfly valve as shown in Figure 1, 2, 3, comprises valve body 1, butterfly plate 2, the valve rod 3 driving butterfly plate 2 to rotate and the electric control box 4 being located at valve body 1 outside; Butterfly plate 2 is provided with the flow tube 21 of the hollow parallel with its plate face, and when the position that described butterfly plate 2 forwards to open, the arranged direction of flow tube 21 is consistent with treating the direction of fluid measured; Positioned opposite on the tube wall of flow tube 21 have electromagnetic induction coil 8 and be arranged in the paired electrode 22 in the magnetic field range of electromagnetic induction coil 8, and fluid flows through electromagnetic induction coil 8 and electrode 22 and produce induction current on electrode 22; Circuit board 5 is provided with in electric control box 4; Electromagnetic induction coil 8 is electrically connected with circuit board 5 by wire (not shown) and forms closed-loop path; Electrode 22 is connected with circuit board 5 by wire; Circuit board 5 is provided with the puocessing module 6 by drawing fluid real-time traffic information to the induction current process of electrode 22.
Electrode 22 is preferably embedded perpendicular to flow direction and is arranged on the relative sidewall of flow tube 21.
Flow tube 21 is embedded the central position being arranged in butterfly plate 2, and the central shaft of flow tube 21 overlaps with the plate face of butterfly plate 2, and the plate face of butterfly plate 2 is positioned at the two end part, outside of flow tube 21, the plate face of butterfly plate 2 and the tube wall of flow tube 21 one-body molded.
Valve rod 3 is provided with vertically the through hole 7 being communicated with electric control box 4 and electromagnetic induction coil 8; The wire via through holes 7 of electromagnetic induction coil 8 is connected with circuit board 5.
The driving mechanism of battery 9 and actuate valve stem 3 rotation is provided with in electric control box 4; Circuit board 5 is provided with and controls the control module 10 that driving mechanism performs corresponding operating; Battery 9 is electrically connected with driving mechanism, circuit board 5.Driving mechanism comprises drive motor 11, the gearbox 12 be connected with drive motor 11 axle, the gear train of being located at gearbox 12 output shaft; The driving wheel 13 of gear train is fixed with the output shaft of gearbox 12, and follower 14 is fixed with valve rod 3.Control module 10 is connected with puocessing module 6 communication, and control module 10 controls driving mechanism according to the fluid real-time traffic that puocessing module 6 draws and performs corresponding operating.
Circuit board 5 is provided with the wireless communication module 15 be connected with control module 10; Electric control box 4 is provided with the antenna 16 for receiving and launch wireless communication signal, and antenna 16 is connected with wireless communication module 15.
Be provided with the limit switch 17 just drawing real-time traffic information for limiting puocessing module 6 when butterfly plate 2 turns to parallel with fluid flow direction in electric control box 4, limit switch 17 is electrically connected with puocessing module 6, control module 10.Valve rod 3 is from top to bottom arranged with and the bearing 18 of valve body 1 interference fit, spacer 19 and oil sealing 20 successively; By the effect of bearing 18, valve rod number of revolutions is more, rotates more laborsaving, and working life extends.
Principle of the present invention is as follows
When butterfly plate 2 turns to valve opening state, fluid flows through flow tube 21, and electrode 22 can produce induction current, and faradic size of current calculates and is converted into uninterrupted by puocessing module 6, can draw fluid flow information now; When butterfly plate 2 turns to close valve state, butterfly plate 2 plays the effect of damming.
Control driving mechanism by control module 10 and perform switch valve operation, realize the Automated condtrol to the open and close of dish valve.By puocessing module 6 being connected with control module 10, make control module 10 can control the open and close of butterfly plate 2 according to the real-time traffic of fluids within pipes.Wireless communication module 15 can realize remote wireless control to control module 10, thus realizes controlled in wireless to the open and close of butterfly valve, and antenna 16 can improve the ability receiving corresponding control signal.
By the effect of limit switch 17, make to only have the puocessing module 6 when butterfly plate 2 turns to optimum position (namely flow tube 21 is parallel to the flow direction of fluid) just to carry out fluid flow process, reduce measurement error, make measurement of fluid flow more accurate.
The outer surface of electromagnetic induction coil 8 should keep concordant with the inwall of flow tube 21, prevents surface irregularity and makes precipitate bulk affect measuring accuracy above.The inwall of flow tube 21 can also be coated with in the complete electrically insulating substrate of one deck, prevents induced potential by metal pipe-wall short circuit, such as corrosion-resistant, wear-resisting polytetrafluoroethylplastic plastic, pottery etc.
The present invention adopts electromagnetic measurement mode to measure fluid flow, and measuring accuracy is high, solves the problem that in pipeline, valve and flowmeter are installed separately, reduces cost; According to the open and close valve of real-time traffic remote wireless control butterfly valve, the unified automatic management to pipeline, telecontrol and maintenance can also be applicable to.