CN201310665Y - Hyper-pressure pressure-loss emergency shut-off valve - Google Patents

Abstract

The utility model discloses a hyper-pressure pressure-loss emergency shut-off valve, which mainly comprises a main valve body, a valve rod, a shut-off spring and a membrane cavity composed of an upper valve body and a top cover body, wherein a flexible sheet, a hanging and fastening tray and a fixed ball rack sleeve are assembled in the membrane cavity. The shut-off valve utilizes a pushing ball convex ring on the inner wall of the hanging and fastening tray to push a locking rod steel ball to lock a hanging and fastening valve rod, and the hanging and fastening tray can slide up and down to unlock the hanging and fastening valve rod when a pipeline system emerges the hyper-pressure and pressure-loss, the shut-off spring can push the valve rod to rapidly move down for closing a valve opening to shut off an air source, thereby realizing the safety purpose of emergency shut-off of a pipe network device system in hyper-pressure and pressure-loss.

Description

Superpressure decompression Emergeny Cutoff Valves

Technical field:

The utility model relates to cut-off valve, particularly a kind of superpressure decompression Emergeny Cutoff Valves, and it is adapted at transmission ﹠ distribution and send in the pipe network system of rock gas, coal gas, liquefied petroleum gas (LPG) or other non-corrosive fluids and install and use.

Background technique:

Send the pipe network system of rock gas, coal gas, liquefied petroleum gas (LPG) or other non-corrosive fluids with regard to existing transmission ﹠ distribution, can be subjected to the interference of factors such as the bleed pressure of carrying, peripheral geological condition, amblent air temperature and temperature unavoidably, all can cause the supply gas pressure of body of institute's transmission ﹠ distribution fluctuation to occur.If pressure fluctuates up and down when exceeding allowed band, two kinds of extreme hazardous conditions of " superpressure " and " decompression " will appear, send the pipe network equipment safety emergency cut-off source of the gas that should take immediate steps in order to ensure transmission ﹠ distribution.And send in equipment and the pipe network system in existing transmission ﹠ distribution generally is the excess pressure cutout device to be installed carry out " superpressure " protection, and " decompression " state is not taked protective measure.According to investigation and analysis:,, can lead to serious security incident too in case " decompression " extremity occurs and deal with improperly at that time if pipe network system is carried out " decompression " protection.Send the technical task of " o-volt protection " in the gas distributing system system in order to solve transmission ﹠ distribution; the applicant had once proposed a kind of " superpressure decompression emergency cut-off device " (number of patent application: 200820063919.5); its structural feature is: in addition equipped casing on the valve body of cut-off valve; equipped again pull bar and valve rod in casing; equipped roller and hook on the pull bar; the position that matches with roller on valve rod is fitted with decompression cone pulley and superpressure cone pulley; one end of valve rod is connected in diaphragm unit; be fitted with superpressure Regulation spring and decompression Regulation spring at the valve rod the other end; when pipeline generation superpressure or decompression; superpressure cone pulley on the valve rod or decompression cone pulley will promote roller and drive pull bar and move and hook is separated with block, valve component be moved down seal valve port to cut off source of the gas.This cutter shows through actual the use: be one though it is collection " excess pressure cutout " and " decompression cut-out " two functions; the purpose that the energy realization is carried out " superpressure " and " decompression " two kinds of protections to pipe network; but its structure is comparatively complicated, manufacturing cost is higher.This just this cutter need continue to improve and further perfect place, this also just the utility model want the problem that solves.

The model utility content:

The purpose of this utility model is intended to overcome the deficiencies in the prior art part, and the superpressure decompression Emergeny Cutoff Valves that proposes that a kind of structure is simple and direct, easy to manufacture, cost of production is lower, can carry out " superpressure " and " decompression " protection simultaneously to pipe network.

The superpressure decompression Emergeny Cutoff Valves that the utility model proposes is achieved by the following technical solution: it comprises main valve body, upper valve body, loam cake cover body and the valve port that is fitted in the main valve body, valve rod, supporting is installed on valve rod cuts off the spring seat of spring, be fitted with gasket seal in the spring seat bottom, it is characterized in that: hard-wired upper valve body on main valve body, loam cake cover body structure film forming chamber, in the film chamber, be fitted with and be connected in the flexible sheet that buckles pallet, the fixedly ball-collecting rack that is installed on upper valve body is placed on and buckles in the pallet, wear and be assigned in fixedly that the valve rod that buckles of ball-collecting rack body is connected in valve rod, in the cinclides that fixedly ball-collecting rack overlaps, be fitted with the locking bar steel ball, be provided with the heading bulge loop at the inwall that buckles pallet, be fitted with superpressure Regulation spring and decompression Regulation spring in the loam cake cover body, the decompression Regulation spring is supported on and buckles pallet.When the pipeline system transmission ﹠ distribution are supplied gas the pressure of body in allowed band during normal operation, the compressed gas that to be taken from the main valve body outlet side by the signal gas-tpe fitting imports in the film chamber as air pressure signal, at this moment buckle pallet and will under the precompression acting in conjunction of the gas pressure in the film chamber and superpressure Regulation spring, decompression Regulation spring, be in the equilibrium position state, that is to say that the heading bulge loop that buckles the setting of pallet inwall just in time withstands the locking bar steel ball and will buckle valve rod locking by the locking bar steel ball, the valve port of main valve body is held open keeps normal working.When pipeline system institute transmission ﹠ distribution supply gas that the pressure of body surpasses the authorized pressure set and when being in " superpressure " hazardous condition, the air pressure of taking from the compressed gas of main valve body outlet side in the film chamber can increase thereupon, can promote to buckle on the pallet to move, this hour locking lever steel ball can depart from and be lower than the position that buckles pallet inwall heading bulge loop and lose and stop outwards to roll and move, make to buckle valve rod and lose locking, at this moment valve rod will be cut off the effect of spring and move down fast and by the equipped gasket seal in spring seat bottom valve port is tightly sealed.So far, can realize the protection purpose of " excess pressure cutout ".In like manner; when pipeline system is in " decompression " state; air pressure in the film chamber can decrease; buckling pallet will be subjected to the effect of decompression Regulation spring and move down; this hour locking lever steel ball can depart from and be higher than the position that buckles pallet inwall heading bulge loop again and lose and stop outwards to roll and move; make again to buckle valve rod and lose locking, at this moment valve rod will be cut off the effect of spring again and move down fast and by the equipped gasket seal in spring seat bottom valve port is tightly sealed, and realize the protection purpose of " decompression cut-out ".

The utility model also has following feature:

In the bottom of spring seat the guiding crowfoot that places in the valve port is installed also, valve rod is in the process of moving up and down, four sliding pawls of guiding crowfoot are positioned at valve port and slippage about the valve port inwall all the time, valve rod is had the effect of good guide-localization, cut off sealability and have a significant effect improving.

On valve rod, do equalizing orifice, can make valve rod in the process of moving up and down, be in pressure balance all the time, can effectively improve the reaction velocity of " cut-out of superpressure decompression ".

Also equipped framework between main valve body and upper valve body, said frame assembled has the spanner that resets that is connected in shift fork, can carry out reset operation easily, also can be used as the auxiliary operation of people for hand off.

The utility model is compared with prior art has following structural feature: it is to utilize the heading bulge loop that buckles pallet to withstand the locking bar steel ball to lock buckling valve rod; when pipeline " superpressure " or " decompression "; buckle in the pallet meeting automatically; move down and make and buckle the purpose that valve rod loses locking and then realizes the emergency cut-off source of the gas; the utility model structure is very simple and direct; easy to manufacture; cost of production is low; manipulate with maintenance management very convenient; can reduce the operational and administrative expenses that the pipe network transmission ﹠ distribution are sent system greatly, have and be quick on the draw; it is fast to cut off action; high and the strong remarkable advantage of safety protection unfailing performance of automaticity.

Description of drawings:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the side view of Fig. 1;

Fig. 3 is the partial enlarged drawing in film chamber, shows the structure principle chart that the superpressure decompression is cut off;

Fig. 4 is the structural representation (amplification) that buckles pallet, shows the structure of heading bulge loop.

Embodiment:

The superpressure decompression Emergeny Cutoff Valves that the utility model proposes is performed such enforcement: it is mainly by main valve body 23, bonnet 26, framework 27, upper valve body 30, loam cake cover body 12 and the valve port 21 that is fitted in the main valve body 23, valve rod 1 constitutes, the spanner 31 that resets that is connected in shift fork 29 by square toes bar 28 is arranged at framework 27 place's devices, supporting is installed on valve rod 1 cuts off the spring seat 25 of spring 16, be fitted with gasket seal 22 and guiding crowfoot 17 in spring seat 25 bottoms, hard-wired upper valve body 30 on main valve body 23, loam cake cover body 12 structure film forming chambers 35,11, in film chamber 35, be fitted with in 11 by buckling pallet 3, pressing plate 34 and flexible sheet 32, upper valve body 30 is equipped with the signal gas-tpe fitting 14 that communicates with film chamber 35, being installed on fixedly ball-collecting racks cover 13 in the upper valve body 30 places and buckles in the pallet 3, wear and be assigned in fixedly that the valve rod 9 that buckles of ball-collecting rack body 13 is connected in valve rod 1, in the cinclides of fixing ball-collecting rack cover 13, be fitted with locking bar steel ball 2, be provided with heading bulge loop 33 at the inwall that buckles pallet 3, in said loam cake cover body 12, be fitted with superpressure Regulation spring 4, superpressure regulating cock 5, divide spacer 10, decompression Regulation spring 6, decompression regulating cock 7 and upper cover body 8, superpressure Regulation spring 4 is supported on branch spacer 10, decompression Regulation spring 6 is supported on and buckles pallet 3, it is work like this: in the pipe network system normal course of operation, that is to say that institute's transmission ﹠ distribution supply gas the pressure surge of body in the allowed band of setting the time, the gas that institute's transmission ﹠ distribution are sent is the air-inlet cavity of pressing shown in the arrow 20 by main valve body 23 24, through hole 18 through valve port 21, outlet chamber 19 enters the outlet side pipe, the compressed gas that to be taken from the outlet side output tube by signal gas-tpe fitting 14 is imported in the film chamber 35 as the bleed pressure signal by air flue 36, regulating cock of preset superpressure again 5 and decompression regulating cock 7 are set the precompression of superpressure Regulation spring 4 and decompression Regulation spring 6 respectively, the operation spanner 31 that resets makes under the precompression acting in conjunction that buckles pallet 3 bleed pressure and superpressure Regulation spring 4 and decompression Regulation spring 6 in film chamber 35 and is in the equilibrium position state, make the heading bulge loop 33 that buckles pallet 3 inwall settings just in time withstand locking bar steel ball 2, can will buckle valve rod 9 by locking bar steel ball 2 and lock, at this moment valve rod 1 is buckled valve rod 9 and upwards mentions and make the through hole 18 that is fitted to the valve port 21 in the main valve body 23 be opening state.When pipeline system institute transmission ﹠ distribution are supplied gas the pressure of body when surpassing the authorized pressure set and being in " superpressure " hazardous condition, the bleed pressure of taking from the outlet side in the film chamber 35 can increase thereupon, at this moment flexible sheet 32 pressurizeds increase promotion buckled on the pallet 3 thereupon and move, lose and stop outwards to roll and move owing to buckling to move on the pallet 3 locking bar steel ball 2 to be departed from and be lower than the position that buckles pallet 3 inwalls headings bulge loop 33, make to buckle valve rod 9 and lose locking, valve rod 1 will be cut off spring 16 effects and move down fast and by the equipped gasket seal 22 in spring seat 25 bottoms the through hole 18 of valve port 21 is tightly sealed the cut-out source of the gas.So far, can realize the protection purpose of " excess pressure cutout ".In like manner, when pipeline system is in " decompression ", bleed pressure in the film chamber 35 can decrease, at this moment flexible sheet 32 is subjected to drops, buckling pallet 3 promoted by decompression Regulation spring 6 and move down, locking bar steel ball 2 can depart from and be higher than the position that buckles pallet 3 inwalls headings bulge loop 33 again and lose and stop outwards to roll and move, and makes to buckle valve rod 9 and lose locking, and at this moment valve rod 1 will be cut off spring 16 effects again and moves down fast the through hole 18 of valve port 21 is tightly sealed the cut-out source of the gas.Can realize the protection purpose of " decompression cut-out ".The equalizing orifice 15 that valve rod 1 is done, can make valve rod 1 in moving up and down whole stroke, be in state of equilibrium all the time, to improving cut-out melon reaction velocity positive effect is arranged, move up and down in the stroke at valve rod 1, four sliding pawls of guiding crowfoot 17 all are to be positioned at valve port 21 all the time and slippage about through hole 18 inwalls, can play the effect of guide-localization to valve rod 1, have certain effect improving the cut-out sealability.The utility model structure is simple and direct, easy to manufacture, manipulate and maintenance management convenient, have the remarkable advantage that the action cut off is fast, safety reliability is high, it is particularly suitable for sending in the pipe network system of rock gas, coal gas, liquefied petroleum gas (LPG) or other non-corrosive fluids assembling to use in transmission ﹠ distribution.

Claims (4)

1. superpressure decompression Emergeny Cutoff Valves, it comprises main valve body (23), upper valve body (30), loam cake cover body (12) and be fitted to valve port (21) in the main valve body (23), valve rod (1), supporting is installed on valve rod (1) cuts off the spring seat (25) of spring (16), be fitted with gasket seal (22) in spring seat (25) bottom, it is characterized in that: go up hard-wired upper valve body (30) at main valve body (23), loam cake cover body (12) structure film forming chamber (35), in film chamber (35), be fitted with and be connected in the flexible sheet (32) that buckles pallet (3), the fixedly ball-collecting rack cover (13) that is installed on upper valve body (30) places and buckles in the pallet (3), wear and be assigned in fixedly that the valve rod (9) that buckles of ball-collecting rack body (13) is connected in valve rod (1), in the cinclides of fixing ball-collecting rack cover (13), be fitted with locking bar steel ball (2), be provided with heading bulge loop (33) at the inwall that buckles pallet (3), be fitted with superpressure Regulation spring (4) and decompression Regulation spring (6) in loam cake cover body (12), decompression Regulation spring (6) is supported on and buckles pallet (3).

2. superpressure decompression Emergeny Cutoff Valves according to claim 1 is characterized in that: the guiding crowfoot (17) that places in the valve port (21) also is installed in the bottom of spring seat (25).

3. superpressure decompression Emergeny Cutoff Valves according to claim 1 and 2 is characterized in that: valve rod (1) has been done equalizing orifice (15).

4. superpressure decompression Emergeny Cutoff Valves according to claim 1 and 2 is characterized in that: also equipped framework (27) between main valve body (23) and upper valve body (30), said framework (27) is equipped with the spanner that resets (31) that is connected in shift fork (29).

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