CN2784698Y

CN2784698Y - Pressure regulating valve with dual closing mechanism

Info

Publication number: CN2784698Y
Application number: CN 200520040171
Authority: CN
Inventors: 平山明広
Original assignee: ITO FUTURE EQUIPMENT TRADE (SHANGHAI) CO Ltd
Current assignee: ITO FUTURE EQUIPMENT TRADE (SHANGHAI) CO Ltd
Priority date: 2005-03-16
Filing date: 2005-03-16
Publication date: 2006-05-31
Anticipated expiration: 2015-03-16

Abstract

The utility model discloses a pressure regulating valve with a dual closing mechanism and comprises a partition between an outlet and an inlet in a pressure regulating room, a first valve seat fixed on the center of the partition and a second valve body connected with one end of a first valve rod. The pressure regulating valve with a dual closing mechanism is characterized in that the pressure regulating room further comprises a second valve seat arranged above the first valve seat of the center of the partition, a second valve rod which is arranged below the second valve body and has the diameter smaller than the diameter of the first valve rod, a first valve body which is arranged at the lower end of the second valve rod, has the diameter smaller than the diameter of the second valve body and is interlocked with a leather diaphragm and an elastic connecting body for connecting the first and second valve bodies, wherein the first and second valve bodies are respectively matched with the first and second valve seats. The pressure regulating valve with a dual closing mechanism can prevent the danger of the downstream pressure rising because of bad occlusion and guarantee the safe supply of the fluid. After the liquid is consumed, the second valve body can automatically open in company with the process of the pressure descending in a downstream pipe line, therefore the normal continuous supply of the gas is achieved.

Description

Double shut mechanism pressure regulator valve

Technical field

The utility model relates to the pressure regulator valve that uses on worker, battalion's cause, the especially a kind of a kind of pressure regulator valve that can adjust the firing pressure of supplied burner automatically.

Background technique

Fig. 1 is the existing pressure regulator valve structure that is used to regulate combustion gas or other hydrodynamic pressures.Wherein, the front portion of surge-chamber 1 is provided with inlet 2, and the rear portion is provided with outlet 3, is fixed with damping chamber 4 on the top of surge-chamber.Inlet 2 in the above-mentioned surge-chamber 1 and export 3 between be provided with and cut off 5, valve seat 6 usefulness screw threads are fixed on and cut off 5 centre.Valve body 7 is corresponding with it, and valve body 7 links to each other with an end of first valve rod 9, and simultaneously the other end of first valve rod 9 and surge-chamber 4 interior levers 11 are connected.The opposite side of damping chamber 4 is epitheliums 14, and is fixed together by loam cake 13.Be provided with the vent identical 12 at loam cake 13 with atmosphere, above-mentioned damping chamber 4 communicates with surge-chamber 1 by intercommunicating pore 15, in addition, in the cylindrical portion 22 of loam cake 13, internal thread is arranged, and be screwed in cylindrical portion 22 and have externally threaded adjusting screw 23, between adjusting screw 23 and spring board 19, spring 24 is housed.During work, lever 11 can be from action down on the ground in damping chamber 4 by stationary axle 10, link to each other with a end, interfix at the spring board 19 of the middle part of continuous motion stem 17 and compression plate 16, epithelium 14 opposite sides, and epithelium 14 is clipped in the middle at the continuous motion stem 17 of epithelium 14 central positions.Make epithelium 14 with continuous motion stem interlock about in the of 17, when with the valve open of outlet 3 burners that are connected after, fluid begins to be consumed, fluid flows into from the inlet 2 of surge-chamber 1, through valve seat 6, is depressurized the back and flows out pressure regulator valves and enter burner from exporting 3.Get back in the damping chamber 12 by intercommunicating pore 15 by valve seat 6 post-decompression hydrodynamic pressures, epithelium 14 is produced active force, the pressure that the spring 24 of the opposite side of epithelium 14 in 13 inside produced and the acting in conjunction power of atmospheric pressure balance each other, the open degree that makes epithelium 14, valve body 7 keeps relative equilibrium in a position, thereby the outlet pressure of regulated fluid reaches and sets pressure automatically.After the consumption of fluid stopped, the hydrodynamic pressure of outlet 3 rose, and the pressure that is applied to epithelium 14 belows moves upward epithelium 14 greater than aforesaid acting in conjunction power, valve body 7 is pushed to valve seat 6 and closed make fluid stop to flow by lever 11, valve rod 9 simultaneously.The pressure regulator valve that above-mentioned tradition is used, in case when solid foreign materials such as the rubbish iron filings are arranged between valve body 7 and the valve seat 6 block, valve body 7 can not be closed fully, outlet port 3 pressure rise.Just the pressure in pressure regulator valve downstream rises, and the result diffuses safety valve or the damage of upstream device.

Summary of the invention

In order to address the above problem, the utility model enters the mouth in surge-chamber, set up second valve seat and corresponding valve body between first valve seat and the outlet, and makes it and the epithelium interlock.Thereby regulate the outlet pressure of the open degree regulated fluid between above-mentioned first valve seat and the valve body, in a single day there is foreign matter to block between first valve body and the valve seat, outlet pressure rises and is higher than when setting pressure, effect by epithelium is compressed the Regulation spring between two valve bodies, make second valve body near second valve seat, final plant closure second valve body reaches the purpose of closing pressure regulator valve, prevents escape of liquid.

After adopting technique scheme of the present utility model, by regulating the open degree between first valve body and the valve seat, realize the outlet pressure of regulated fluid usually, keep between second valve body and the valve seat often opening.And when the consumption of fluid stopped, the pressure of outlet side rose, and promoted epithelium and move up, and first valve body and valve seat are closed.As mentioned above, when having solid foreign materials to block between first valve body and the valve seat, valve body and valve seat can't be closed fully, and fluid leaks, and outlet pressure rises.At this moment, epithelium moves up, and the Regulation spring between first and second valve body is compressed, and makes second valve and the two or two valve seat realize closing, and prevents the leakage of fluid.

Description of drawings

Below, with reference to accompanying drawing, for those skilled in the art that, to the detailed description of the present utility model, above-mentioned and other purposes of the present utility model, feature and advantage will be apparent.

Fig. 1 is the longitudinal sectional drawing of former product;

Fig. 2 is the utility model embodiment's a longitudinal sectional drawing;

Fig. 3 is the partial enlarged drawing of Fig. 2.

Embodiment

See also accompanying

drawing

2,3, wherein Fig. 3 sets up the enlarged diagram of second valve seat and corresponding valve body structure for pressure regulator valve shown in Figure 2.Other parts and traditional pressure regulator valve similar, improvements be, cut off 5 first valve seat 25, second valve seat 26 be set respectively up and down.Be internal thread at the tapping that cuts off 5 just, the lower end is small-bore first valve seat 25, and the upper end is wide-aperture second valve seat 26, and there is outside thread the upper end of whole first and

second valve seat

25,26, is cutting off on 5 in order to be fixed on.

What cooperate with first valve seat 25 is first valve body 30 of minor diameter, and what cooperate with second valve seat 26 is large diameter second valve body 31.The lower end of second valve body 31 and first valve rod 9 adopts screw thread to be fixed, less second valve rod, the 32 usefulness screw threads of first valve body 30 and the diameter below second valve body 31 are fixed, and can move, but must carry out airtight processing with O type rubber ring with minor diameter second valve rod 32 common easy on and off.

By Regulation spring 33 relative fixed, when first valve body 30 and first valve seat 25 are closed as shown in Figure 2, still keep separated state between second valve body 31 and second valve seat 26 between the above-mentioned

valve body

30,31.

35 are the filter screen between setting and valve seat and the surge-chamber in the drawings.

In the foregoing description, as shown in Figure 2, when first valve body 30 and first valve seat 25 were closed, second valve body 31 separated with second valve seat 26, is in open state.

Under this kind state when the valve fluid of opening burner begins to be consumed, the fluid that flows into from the inlet 2 of surge-chamber 1 is depressurized the back and flows into burners from exporting 3 through

first valve seat

25,26.

Enter damping chamber 4 through valve seat 27 post-decompression fluids by passage 15, epithelium 14 is produced thrust, the pressure of the spring 24 in loam cake and atmospheric pressure act on the opposing party of epithelium 14, utilize the mutual balance of power on epithelium 14 both sides and control the open degree of first valve body 30, and keep stable, reach pressure this purpose that automatic adjusting flows to outlet 3 fluids.

When fluid consumption stops, the hydrodynamic pressure that exports 3 sides rises, fluid also strengthens the thrust of epithelium 14 thereupon, and above opposite side spring pressure and atmospheric pressure, epithelium 14 moves to spring 24 directions, is passed to valve body 30 valve body 30 and first valve seat 25 are closed by lever 11, first valve rod 9,32.Fluid flows and stops.

When adopting the utility model pressure regulator valve, though the consumption of fluid stops,, cause and to close fully owing to have solid foreign materials a to be stuck as shown in Figure 2 between first valve body 30 and first valve seat 25, the fluid continuation to outlet 3, causes downstream pressure to rise by slit flow.

The rising of pressure causes epithelium 14 to move to spring 24 directions, in first valve rod 9 of interlock move downward as shown in Figure 3, make that second valve body 31 is stressed to move and close to second valve seat 26.At this moment, first valve body 30 and second valve seat 26 have foreign matter a to produce slit, also gapped generation between the increased diameter head 34 of second valve rod 32 and first valve body 30.

Above-mentioned ought have foreign matter to block by first valve body 30 according to this scheme, and cause valve body to be closed when bad, second valve body 31 replaces first valve body 30 to close once more, prevent that downstream fluid pressure from rising, therefore because the danger that the inaccessible bad downstream pressure that causes rises can obtain basic preventing, guarantee the safety supply of fluid.And after fluid was consumed, along with the decline of downstream line internal pressure, second valve body can be opened again automatically, thereby realized the normally without interruption of gas.

More than all embodiments only for the explanation the utility model usefulness, but not to restriction of the present utility model, person skilled in the relevant technique, under the situation that does not break away from spirit and scope of the present utility model, can also make various conversion or variation, so all technological schemes that are equal to also should belong to category of the present utility model and should be limited by each claim.

Claims

1, double shut mechanism pressure regulator valve comprises the partition between the entry and exit in the surge-chamber, is fixed on first valve seat of described partition centre, and the second continuous valve body of first valve rod, one end, it is characterized in that, further comprises at described surge-chamber:

Second valve seat is arranged on above first valve seat of described partition centre;

Second valve rod be arranged on the below of described second valve body, and diameter is less than described first valve rod;

First valve body be arranged on the lower end of described second valve rod, and diameter is smaller than described second valve body, described first valve body and epithelium interlock;

Nonrigid connector connects described first and second valve body;

Wherein, described first and second valve body matches with first and second valve seat respectively.

2, double shut according to claim 1 mechanism pressure regulator valve is characterized in that,

The below that described second valve rod stretches out described first valve body forms an increased diameter head.

3, double shut according to claim 1 and 2 mechanism pressure regulator valve is characterized in that,

The employing screw thread of described second valve body and described second valve rod is fixed, and is flexible connection between described first valve body and described second valve rod.

4, double shut according to claim 3 mechanism pressure regulator valve is characterized in that described pressure regulator valve further comprises:

Filter screen is arranged between valve seat and the surge-chamber.