CN102996848A

CN102996848A - Diaphragm stop valve with double diaphragms

Info

Publication number: CN102996848A
Application number: CN2011102650301A
Authority: CN
Inventors: 彭新民; 彭真武
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-09-08
Filing date: 2011-09-08
Publication date: 2013-03-27

Abstract

A diaphragm stop valve (figure 1) good in sealing performance is characterized in that the diaphragm stop valve with double diaphragms is composed of an upper and a lower different circular S-shaped corrugated diaphragm structures respectively and can operate under a high-temperature, high-pressure, strong-corrosion and leaking-free working state for a long time. The diaphragm stop valve combines the advantages of a diaphragm valve, a stop valve and a bellows valve and an alarming sensing system, improves valve use safety, and solves the problem that the valve is not resistant to high temperature or high pressure, and a valve rod sealing position is easy to leak. The diaphragm stop valve is the optimal choice for application in industries such as biology, chemical industry, nuclear power source extraction, fuel conveying, thermal power generation, boilers, sewage treatment and water supply and discharge. The diaphragm stop valve has the advantages of being simple in structure, convenient to maintain, large in flow rate, free of leakage, wide in use temperature range, capable of alarming automatically, resistant to strong corrosion and the like and is an innovative trend of valves.

Description

Two diaphragm diaphragm shutoff valves

Affiliated technical field

1. the present invention relates to the two diaphragm diaphragm shutoff valves (Fig. 1) of compressing " S " type ripple of the materials such as a kind of novel composite material and strengthening net, be applicable in the industries such as pharmacy, biology, fermentation, food, health, and can under high temperature, high pressure, sterilize and the function such as warning, during application without the corner or spot as yet untouched by a clean-up campaign.

2. the present invention relates to the two diaphragm diaphragm shutoff valve (figure of " S " type ripple that a kind of novel multi-layer sheet metal laminates moulding, 5), the industry such as can be applicable to the requirement of nuclear power source leaching process and be applicable to work under the high temperature operating modes such as thermal power generation, boiler, and have without leaking and the functions such as warning.

3. the present invention relates to the two diaphragm diaphragm shutoff valves of a kind of novel " S " type ripple, be applicable to the application of the industries such as oil, chemical industry, combustion gas and sewage treatment, water supply and draining.

4. the present invention relates to the two diaphragm diaphragm shutoff valves of a kind of novel " S " type ripple, select the membrane valve of the diaphragm composition of different materials, can also can under the special operation condition environment, work by the wide model of Applicable temperature.

Background technique

What present membrane valve adopted is weir formula valve body, this membrane valve it take up rate all lowlyer, unbalance stress, heatproof degree are low again, working life is short, can not work under superhigh temperature, high pressure and ultralow temperature, operating mode for diaphragm during work; There is again the corner or spot as yet untouched by a clean-up campaign in present stop valve, and problem sealing life of valve rod and valve cover chamber, and the application surface press for extracting juice of this stop valve is little etc.; The deficiency factors such as complex structure, the latus rectum of present bellows stop valve is little, difficulty of processing is large, working life is short.

Summary of the invention

In order to overcome their little, the deficiency such as working pressure is little, the heatproof degree is low, working life short, application surface presses little etc. and maintenance is inconvenient of stimulating the menstrual flow of existing membrane valve, stop valve, bellows stop valve, the invention provides the two diaphragm diaphragm shutoff valves of a kind of novel " S " type ripple.

The technological scheme that its technical problem of this practicality invention solution adopts is:

1. the invention has the beneficial effects as follows: stimulate the menstrual flow large, little, the anti-working pressure of flow resistance is high, serviceability temperature scope wide (200 ℃～+ 400 ℃), good seal performance, without corner or spot as yet untouched by a clean-up campaign, leakage alarm, long service life, extensive, simple in structure, the easy to maintenance texts of application surface.

2. adopt the splendid sheet metal punching press of stainless steel thin slice or plasticity, laminate " S " type diaphragm structure and the production method of making moulding.

3. adopt the materials such as composite material and strengthening net compressing " S " type diaphragm-type structure and production method.

4. the special designs of carrying out according to different industries and application requirements.

5. the universal design of carrying out according to different industries and application requirements, the realization of general part can reduce cost greatly, and forms the marketization and produce.

Description of drawings

The present invention is further described below in conjunction with drawings and Examples:

Fig. 1 is the work schematic representation of " S " of the present invention type corrugated diaphragm valve (soft seal) when closing;

Fig. 2 is " S " of the present invention type corrugated diaphragm valve body structure schematic representation;

Fig. 3 is " S " of the present invention type ripple operating valve diaphragm structure schematic representation;

Fig. 4 is " S " of the present invention type ripple safety valve diaphragm structure schematic representation;

Fig. 5 is the work schematic representation of " S " of the present invention type corrugated diaphragm valve (hard sealing) when closing.

Embodiment

In Fig. 1, valve body (1) mainly is the road warp of Fluid Flow in A, " S " type ripple working diaphragm sheet (2) mainly is the effect of airtight valve port and isolating valve body cavity and valve cover cavity, diaphragm (2) is fixed on flap (3) center, lower end by diaphragm screw (16), the outer rim of diaphragm (2) valve body (1) and valve body in the seat (15) between, and seat (15) has seam location in valve body (1) and the valve body, be fixed connection with connecting bolt (14), separated thus fluid to external leakage; Seat (15) is provided with the sensing device (4) of a warning in valve body; At flap (3) blowout disk (5) and pressure pad (6) are installed, fixing with thin type nut (7); On flap (3), pack into location piece (8) and valve rod (11) and location piece (8) and valve rod (11) are fixed with thin type nut (9) and gland nut (10); The valve stem packing ring (12) of in valve gap (18) inner groovy, packing into; Blowout disk (5) outer rim is seat (15) and valve gap (18) centre in valve, is fixed connection by bolt (17); Pack on valve rod (11) top handwheel (13) and packing ring (19) compress with nut (20).

In Fig. 5, by process and mill after hard sealing bottom (21), with screw (22) diaphragm (2) is fixed on the flap (3), consist of hard seal dissepiment valve.

The band ovable valve stem rotates when rotating handwheel (13), valve rod is produced move up, and the mobile flap that drives of valve rod moves up, and valve port is unlocked, and fluid flows to out by valve port at supply pipe, and the fluid of this moment is separated by diaphragm, can only flow out from discharge nozzle.

When valve working and working masks when the rupture and leakage phenomenon is arranged sends alarm signal by the alarming sensor (4) at the blowout disk front end; As when blowout disk has leakage phenomenon again, valve stem packing ring this moment (12) is in the compression seal working state, and it can seal effectively for the third time, and it provides safer safeguard to work thus.

Claims

1. two diaphragm diaphragm shutoff valves of " S " type ripple, the working diaphragm sheet that in valve body and valve body, is connected the serpentine ripple of an one-tenth toroidal between the seat, in valve body the seat with valve gap between is connected another one-tenth toroidal serpentine ripple burst diaphragm sheet, the technical characteristics of this membrane valve is:

A, diaphragm are to adopt a kind of serpentine ripple struction that becomes toroidal, and working diaphragm sheet and blowout disk are divided into body cavity, safe inner chamber, valve gap inner chamber with whole valve;

B, should " S " type corrugated diaphragm sheet be divided into structure and production method that multilayer metal foil laminates compressing " S " type diaphragm of moulding and the materials such as multiple composite material and strengthening net;

C, seat is equipped with the sensing device that leakproof is reported to the police in valve body.

2. two diaphragm diaphragm shutoff valves of " S " according to claim 1 type ripple, it is characterized in that: " S " type ripple working diaphragm sheet center is fixed on the flap, the outer rim of working diaphragm sheet is fixed between valve body opening and the middle seat end opening, seam location by the edge is fixed connection with connecting bolt.

3. two diaphragm diaphragm shutoff valves of " S " according to claim 1 type ripple, it is characterized in that: " S " type ripple burst diaphragm sheet center is to be fixed on above the valve rod, a packing ring is set on the diaphragm, be fixed on the valve rod by two thin type nuts, the outer rim of diaphragm is sandwiched between middle seat mouth and the valve gap, seam location by the edge is fixed connection with connecting bolt.

4. two diaphragm diaphragm shutoff valves of " S " according to claim 1 type ripple, it is characterized in that: connect valve rod on the flap, the working masks of flap end opening contacts with valve port and is soft sealing structure, adds a hard Sealing and be hard sealing structure below working masks.

5. two diaphragm diaphragm shutoff valves of " S " according to claim 1 type ripple, it is characterized in that: a seat end opening was provided with a seam that is connected with valve gap with valve body with suitable for reading minute in the valve body, and seat arranges the sensing device of a leakproof warning in valve body.

6. two diaphragm diaphragm shutoff valves of " S " according to claim 1 type ripple is characterized in that: at valve rod a location piece and gland nut are set, with valve rod, be connected with flap.

7. the two diaphragm diaphragm shutoff valves of " S " according to claim 1 type ripple is characterized in that: arrange one to the seal ring of valve stem seal in the middle of the valve gap inner groovy.

8. two diaphragm diaphragm shutoff valves of " S " according to claim 1 type ripple is characterized in that: more than " S " type ripple burst diaphragm sheet, uses different valve gaps, can change to the final controlling element of the driving such as manual, pneumatic, electronic, hydraulic pressure.