A kind of Pneumatic piston diaphragm valveTechnical field
The present invention relates to a kind of valve, specifically a kind of Pneumatic piston diaphragm valve.
Background technology
Valve is the control parts in fluid delivery system, has cut-off, regulation, water conservancy diversion, prevents adverse current, voltage stabilizing, shuntingOr the function such as overflow pressure relief.For the valve of fluid control systems, from simplest stop valve to extremely complex robot control system(RCS)Various valves used by, its kind and specification are the most various.Valve can be used for controlling sky gas and water, steam, various corrosivity JieThe flowing of all kinds fluids such as matter, mud, oil product, liquid metal and radiating medium.Diaphragm valve is the one of valve, and it opensThe barrier film that closing member is made up of flexible material, separates, makes the part of diaphragm not by medium body cavity and valve gap inner chamberCorrosion, can serve as a contrast rubber and plastics as required in valve body, corrosion resistance is strong, is widely used to oil, chemical industry, electric power, doctorThe department such as medicine, environmental protection.The processing safety of existing diaphragm valve is bad, and this just brings inconvenience for user.
Summary of the invention
It is an object of the invention to provide a kind of Pneumatic piston diaphragm valve, with asking of solving to propose in above-mentioned background technologyTopic.
For achieving the above object, the present invention provides following technical scheme:
A kind of Pneumatic piston diaphragm valve, including valve body, valve gap, barrier film, briquetting, valve rod, air cylinder board, spring washer, cylinder body, workPlug, sealing ring and piston rod, described air cylinder board includes cylinder upper plate and cylinder lower plate, sealing ring include the first sealing ring, secondSealing ring and the 3rd sealing ring, the upper end of cylinder body is provided with cylinder upper plate and the inside of piston rod insertion cylinder body, in cylinder bodyPortion is provided with cylinder lower plate, cylinder upper plate and cylinder lower plate and all uses soket head cap screw and spring washer to be fixed on cylinder body, piston rodLower end connect have valve rod and use the second nut to fix, be provided with piston and piston between the second nut and cylinder lower plateIt is connected with spring, between piston and cylinder body, is provided with the second sealing ring, between piston and piston rod, be provided with the 3rd sealing ring, valveBeing provided with the first sealing ring between bar and cylinder lower plate, cylinder lower plate is connected with valve body by swivel nut, and valve body is provided with valve gapAnd being provided with barrier film between valve body and valve gap, barrier film uses briquetting compress and use studs and the first nut to fix,Being provided with Fructus Musae plate between barrier film and briquetting, barrier film uses flexible material to make.
As the further scheme of the present invention: use the mode of welding to be connected between valve body and valve gap.
As the further scheme of the present invention: the first sealing ring, the second sealing ring and the 3rd sealing ring all use O,Briquetting be shaped as the shape of a saddle.
As the further scheme of the present invention: valve body and valve gap all use stainless steel material to make, the first sealing ring, secondSealing ring and the 3rd sealing ring all use silica gel or elastomeric material to make.
Compared with prior art, the invention has the beneficial effects as follows: this apparatus structure is simple, and reasonable in design, detachability is good,It is easily installed and changes；Failure rate is low, good operation stability, it is provided with flexible material between valve body and the valve gap of this device and makesBarrier film and use briquetting to lock, make body cavity separate with valve gap inner chamber, the part of top is not by dielectric corrosion；This deviceBe furnished with hand gear, when power-off, die time can use hand gear immediately, safety in utilization is good.
Accompanying drawing explanation
Fig. 1 is the structural representation of Pneumatic piston diaphragm valve.
Wherein: 1-valve body, 2-barrier film, 3-Fructus Musae plate, 4-briquetting, 5-valve rod, 6-studs, 7-the first nut, 8-spiral shellSet, 9-cylinder lower plate, 10-soket head cap screw, 11-spring washer, 12-cylinder body, 13-piston, 14-spring, 15-the second nut, 16-theOne sealing ring, 17-the second sealing ring, 18-the 3rd sealing ring, 19-cylinder upper plate, 20-piston rod.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the technical scheme of this patent is described in more detail.
Referring to Fig. 1, a kind of Pneumatic piston diaphragm valve, including valve body 1, valve gap, barrier film 2, briquetting 4, valve rod 5, cylinderPlate, spring washer 11, cylinder body 12, piston 13, sealing ring and piston rod 20, described air cylinder board includes cylinder upper plate 19 and cylinder lower plate 9,Sealing ring includes the first sealing ring the 16, second sealing ring 17 and the 3rd sealing ring 18, and the upper end of cylinder body 12 is provided with cylinder upper plate19 and piston rod 20 insert the inside of cylinder body 12, the middle part of cylinder body 12 is provided with cylinder lower plate 9, under cylinder upper plate 19 and cylinderPlate 9 all uses soket head cap screw 10 and spring washer 11 to be fixed on cylinder body 12, and the lower end of piston rod 20 connects to be had valve rod 5 and useSecond nut 15 is fixed, and is provided with piston 13 and piston 13 is connected with spring 14, live between the second nut 15 and cylinder lower plate 9It is provided with the second sealing ring 17 between plug 13 and cylinder body 12, between piston 13 and piston rod 20, is provided with the 3rd sealing ring 18, valveBeing provided with the first sealing ring 16 between bar 5 and cylinder lower plate 9, cylinder lower plate 9 is connected with valve body 1 by swivel nut 8, and valve body 1 is pacifiedEquipped with valve gap and be provided with barrier film 2 between valve body 1 and valve gap, barrier film 2 uses briquetting 4 to compress and use studs 6 HeFirst nut 7 is fixed, and is provided with Fructus Musae plate 3 between barrier film 2 and briquetting 4, and barrier film 2 uses flexible material to make.Valve body 1 and valve gapBetween use welding mode be connected.First sealing ring the 16, second sealing ring 17 and the 3rd sealing ring 18 all use O, pressureBlock 4 be shaped as the shape of a saddle.Valve body 1 and valve gap all use stainless steel material to make, first sealing ring the 16, second sealing ring 17 and3rd sealing ring 18 all uses silica gel or elastomeric material to make.
The operation principle of the present invention is: the barrier film 2 that between valve body 1 and valve gap, useful flexible material is made, and makes valve body 1 inner chamberSeparating with valve gap inner chamber, the part of top is not by dielectric corrosion；The keying of this device is to be made by handwheel or pneumatic, electric deviceValve rod 5 moves up and down, thus drives barrier film 2 action together with flap, reaches to open and close purpose；This device is furnished with manually dressPut, when power-off, die time can use hand gear immediately, safe and reliable.
This apparatus structure is simple, and reasonable in design, detachability is good, it is simple to installs and changes；Failure rate is low, operation stabilityGood, it is provided with the barrier film 2 of flexible material making between valve body 1 and the valve gap of this device and uses briquetting 4 to lock, making valve body 1Inner chamber separates with valve gap inner chamber, and the part of top is not by dielectric corrosion；This device is furnished with hand gear, when power-off, die time canUsing hand gear immediately, safety in utilization is good.
Above the better embodiment of this patent is explained in detail, but this patent is not limited to above-mentioned embodiment partyFormula, in the ken that one skilled in the relevant art is possessed, it is also possible on the premise of without departing from this patent objectiveMake a variety of changes.