CN201507001U

CN201507001U - Safe sanitary antifouling block valve

Info

Publication number: CN201507001U
Application number: CN2009201971924U
Authority: CN
Inventors: 戴建立
Original assignee: Ningbo Amico Copper Valves Manufacturing Co Ltd
Current assignee: Ningbo Amico Copper Valves Manufacturing Co Ltd
Priority date: 2009-09-24
Filing date: 2009-09-24
Publication date: 2010-06-16
Anticipated expiration: 2019-09-24

Abstract

A safe sanitary antifouling block valve comprises a valve body, a first check valve and a second check valve with the same opening direction, a drain valve in the cavity of the valve body, and three globe valves with self-checking function on the valve cover, wherein the first check valve and the second check in hermetical connection are respectively arranged at the inlet and the outlet of the valve body. The safe sanitary antifouling block valve has the advantages of reasonable design, complete function, and compact structure, and can be used normally even if one check valve is damaged. In addition, the safe sanitary antifouling block valve can allow water in a water supply pipe to flow to the users while preventing backflow, thereby preventing contamination of the water supply system. It is very important to prevent backflow of sewage due to reverse pressure particularly for the water supply pipes in the medicine and food industries. The globe valves with self-checking function can realize on-line detection of the inlet pressure, the outlet pressure, and the pressure of the upper cavity above a diaphragm of the drain valve, thereby facilitating the debugging and maintenance of the valve.

Description

The antifouling isolating valve, of safe sanitary

Technical field

The utility model relates to a kind of controlled valve, particularly a kind of antifouling isolating valve, of safe sanitary that is used for medicine, food water-carriage system.

Background technology

In water-carriage system, often require the water in the hydraulic pipeline can transport to the user, and can not allow user's water enter hydraulic pipeline, its purpose is that the water that prevents the user pushes back stream and pollutes hydraulic pipeline, guarantee that hydraulic pipeline is pollution-free, especially medical, the water-carriage system of food, higher to safety and health request, so in the pipeline of carrying toward the user, must install antifouling isolating valve, additional, prevent that sewage from pushing back stream, this is an one, it two is in order to satisfy customer requirements, the import of isolating valve, need be provided, the self-test function of outlet pressure or barrier film upper cavity pressure is convenient to valve debugging and maintenance are required to be provided with the selftest device.The antifouling isolating valve, of prior art is often only installed a flap valve, does not more have self-measuring device, function singleness, leakage phenomenon takes place in a flap valve if damage, just may cause user's water to enter water transfer pipe network, cause whole hydraulic pipeline to pollute, influence the application of antifouling isolating valve.

Summary of the invention

Goal of the invention of the present utility model is to overcome the defective of prior art and the duplicate protection structure of two flap valve of a kind of employing and the fit applications of draining valve is provided; both reduced the influence that antifouling isolating valve, is used; the water that prevents the user pushes back stream and pollutes hydraulic pipeline; prevent to produce siphon refluence phenomenon again, and possess self-test function, be convenient to the antifouling isolating valve, of safe sanitary debugging, keep in repair.

Goal of the invention of the present utility model is achieved through the following technical solutions:

The antifouling isolating valve, of a kind of safe sanitary, it comprises valve body, valve body is provided with flap valve, be provided with draining valve in the valve body lumen, be provided with spring between draining valve and the valve body, this draining valve communicates with funnel, it is characterized in that described flap valve has one-level flap valve and secondary flap valve, be sealedly connected on the import and the exit of valve body respectively, one-level, secondary flap valve opening direction are identical; Simultaneously with valve gap that valve body is connected on be provided with three ball valves that communicate with valve body barrier film epicoele and import and export respectively with self-test function.

Be connected on the coaxial direction with jump ring between described one-level, secondary flap valve and the valve body.

Described draining valve comprises the barrier film that is clamped by upper and lower pressing plate, and this barrier film is separated into epicoele and cavity of resorption with the valve body lumen, and barrier film is connected the valve rod upper end, the valve rod lower end valve seat that is tightly connected, and the valve seat below is provided with sealing mat, pad and spigot nut successively.

Compared with prior art, the utility model is provided with one-level, flap valve that the secondary opening direction is identical in the valve body import of antifouling isolating valve, and exit, in the valve body lumen draining valve is set, and is provided with three ball valves with self-test function simultaneously on valve gap.Reasonable in design, the perfect in shape and function of this valve, compact conformation, even if one of them flap valve damages, also can not influence the use of antifouling isolating valve,, when two flap valve damage simultaneously, the water of returning that flows backwards enters funnel by draining valve, when even inlet pressure drops to zero or negative pressure, draining valve is opened draining and is formed vacuum, air is entered form air partition chamber, thereby prevent to produce siphon refluence phenomenon, isolate pure water and contaminated water, got rid of owing to push back the hydraulic pipeline pollution problem that stream causes; The ball valve that possesses self-test function can be measured inlet pressure, outlet pressure and the barrier film upper cavity pressure of this valve at any time, for user debugging and maintenance provide technical basis.

Description of drawings

Fig. 1 is the utility model sectional structure schematic diagram.

Fig. 2 is the vertical view of Fig. 1.

Fig. 3 is the drain valve structure schematic diagram.

Fig. 4 is the utility model normal water supply state sectional structure schematic diagram.

Hull-borne sectional structure schematic diagram when Fig. 5 is two flap valve generations of the utility model leakage.

The specific embodiment

Below with reference to above-mentioned accompanying drawing the utility model embodiment is described in detail again.

Referring to Fig. 1～Fig. 5,1. funnels among the figure, 2. valve body, 3. spring, 4. secondary flap valve, 5. draining valve, 6. one-level flap valve, 7. jump ring, 8. barrier film, 9. valve gap, 10. ball valve, 11. valve seats, 12. spigot nuts, 13. pads, 14. sealing mats, 15. " O " shape sealing ring, 16. valve rods, 17. lower platens, 18. top boards.

The antifouling isolating valve, of safe sanitary, it comprises valve body 2,, promptly be connected with jump ring 7 between 4, two flap valve of one-level flap valve 6 and secondary flap valve and the valve body with " O " shape sealing ring be tightly connected coaxial installation and two identical flap valve of opening direction in the import of valve body and exit.Be provided with draining valve 5 in valve body 2 lumens, this draining valve is seen shown in Figure 3, comprise the barrier film 8 that clamps by upper and lower pressing plate 18,17, the valve body lumen is separated into epicoele and cavity of resorption, barrier film 8 is connected valve rod 16 upper ends, valve rod 16 lower ends are with " O " shape sealing ring 15 valve seat 11 that is tightly connected, and valve seat 11 belows connect sealing mat 14, pad 13 and spigot nut 12 successively.Spring 3 is located between draining valve valve seat 11 and the valve body 2.

The effect of draining valve is when two flap valve damage simultaneously, flow backwards the water of returning by the user can be by draining valve through funnel 1 discharge, when inlet pressure drops to zero or negative pressure, draining valve is opened fully, water is discharged, and air enters vacuum chamber from draining valve, forms air and cuts off the chamber, thereby prevent to produce siphon refluence phenomenon, played the effect of air insulated pure water and contaminated water.

Simultaneously with valve gap 9 that valve body 2 is connected on be provided with three three ball valves 10 that communicate with valve body barrier film epicoele and import and export respectively, three ball valves have the function of test oneself barrier film upper cavity pressure and inlet pressure, outlet pressure, are convenient to debugging and the maintenance of user to valve.

This antifouling isolating valve, is except barrier film and the making of seal employing acrylonitrile-butadiene rubber, all the other each elements all adopt the anti-corrosion material, for example do not have ledrite, the trade mark is stainless steel of 304,316 or the like, this is to being applied to safety, the health particular importance in medicine, the food hydraulic pipeline.

Dynamic structure is once described below again.

Fig. 4 is the normal water supply state: medicine, food water supply water to the user to 4 outlets of secondary flap valve through draining valve from one-level flap valve 6, one-level check valve inlet water under high pressure enters draining valve barrier film 8 epicoeles by high-pressure hose, and barrier film 8 cavity of resorptions communicate with 6 outlets of one-level flap valve, 4 imports of secondary flap valve, because there is certain pressure reduction in it, be that upper cavity pressure is big, cavity pressure is little down, move down and close so promote draining valve 5, carry out normal water supply.

Fig. 5 is the malfunctioning state of sealing: when ductwork pressure raises, when surpassing this valve inlet pressure, as the intact leakproof of secondary flap valve 4 sealings, water under high pressure can not flow backwards, draining valve 5 barrier films 8 keep original pressure reduction up and down, drain shut valve, not pressure release is when secondary flap valve 4 seal break-offs produce seepage, cavity pressure raises in the valve, cause the draining valve barrier film about in the of 8 pressure differential reduce, draining valve is simultaneously opened the draining pressure release because of spring 3 elastic force effects; Simultaneously seal destroyed as one-level flap valve 6 this moment, because secondary flap valve 4 pushes back the water under high pressure pressure release decompression of stream, so can not flow back to one-level flap valve 6, constantly descend as pressure of supply water in the water supply process, then draining valve barrier film 8 upper pressure descend, and control spring 3 promotes to open the draining valve draining; When inlet pressure dropped to zero or negative pressure, draining valve was opened fully, and water enters funnel 1, and air enters vacuum chamber from draining valve, thereby prevents to produce siphon refluence phenomenon.

Be installed on the valve gap 9 three ball valves 10 realizing online self-test function, respectively with valve body 2 on barrier film 8 epicoeles and water inlet, delivery port links to each other and communicate, and can accomplish on-line testing, convenient for maintaining.After not excessive antifouling isolating valve, was installed on the pipeline, three ball valves 10 were in opening, when valve begins to intake, must close three ball valves fully, otherwise antifouling isolating valve, can't operate as normal, if need enter detection, ball valve is opened and do not influenced water inlet.

Claims

1. antifouling isolating valve, of safe sanitary, it comprises valve body (2), valve body is provided with flap valve, be provided with draining valve (5) in the valve body lumen, be provided with spring (3) between draining valve and the valve body, this draining valve communicates with funnel (1), it is characterized in that described flap valve has one-level flap valve (6) and secondary flap valve (4), be sealedly connected on the import and the exit of valve body (2) respectively, one-level, secondary flap valve opening direction are identical; On the valve gap that is connected with valve body (9), be provided with simultaneously three ball valves with self-test function (10) that communicate with valve body barrier film epicoele and import and export respectively.

2. the antifouling isolating valve, of safe sanitary according to claim 1 is characterized in that being connected on the coaxial direction with jump ring (7) between described one-level, secondary flap valve (6,4) and the valve body (2).

3. the antifouling isolating valve, of safe sanitary according to claim 1 and 2, it is characterized in that described draining valve (5) comprises the barrier film (8) that is clamped by upper and lower pressing plate (18,17), this barrier film is separated into epicoele and cavity of resorption with the valve body lumen, barrier film is connected valve rod (16) upper end, the valve rod lower end valve seat (11) that is tightly connected, valve seat (11) below is provided with sealing mat (14), pad (13) and spigot nut (12) successively.