CN201301993Y

CN201301993Y - Energy-saving environment-friendly type combustible gas intelligent safety valve

Info

Publication number: CN201301993Y
Application number: CNU2008201382766U
Authority: CN
Inventors: 丁文芳; 赵惠平
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-10-27
Filing date: 2008-11-07
Publication date: 2009-09-02
Anticipated expiration: 2018-11-07

Abstract

The utility model discloses an energy-saving environment-friendly type combustible gas intelligent safety valve, comprising a valve body; an air inlet and an air outlet which are communicated by an air channel in the valve body are arranged on the valve body, a vertical valve cavity, which is necking down from the air inlet side to the air outlet side, is arranged on the air channel between the air inlet and the air outlet, a valve core, the bottom of which is supported on a valve core supporting base, is movably assembled in the valve cavity, the upper opening of the valve cavity is communicated with an air leakage pipe which is communicated with the outer side of the valve body, the top part of the valve body is fixed with a solenoid valve which can open and close an air leakage mouth by an outer cover, and the air leakage mouth of the air leakage pipe is matched with a valve plate of the solenoid valve in a corresponding way; the safety valve can automatically adopt the blocking mode according to the property of the air leakage, thereby automatically realizing slightly-leaking blockage, above moderate leakage blockage and shocking blockage, and the safety valve has the characteristic of intellectualization, thereby achieving omni-bearing automatic blockage and making up the safety disadvantage that the existing gas fitting can not carry out slightly-leaking blockage, and when the above moderate leakage blockage happens, blockage can be realized at the moment of leakage, thereby achieving energy-saving effect.

Description

A kind of energy-saving environment protection type combustible gas intelligent safety valve

Technical field

The utility model relates to anti-leak gas valve technical field.

Background technique

Along with coal gas, rock gas, petroleum gas, being extensive use of of liquid gas, leakage because of gas pipeline, the caused blast of rupturing, accidents such as gassing also increase gradually, multiple prevention gas continues leakage when pipeline damages safety switch or safety valve have also appearred on the market, existing anti-leak safety valve adopts the solenoid valve that is installed on the gas pipeline by the control of combustible gas concentration inductive control circuit to carry out the direct shutoff of pipeline mostly, this class induction type safety valve or switch can be reported to the police by combustible gas concentration inductive control circuit when combustion gas reaches finite concentration and be sent the SC sigmal control solenoid valve simultaneously and turn-off, but the operating conditions of this class safety valve is to reach certain gas concentration in the place, gas security place, and can not come work according to the leakage flow of combustion gas, therefore need to leak a large amount of combustion gas and just can reach its operating conditions, with the shutoff concentration of designing natural gas is that 0.1%～0.5% safety switch or safety valve are example, 15～20m ²The room just need 45～46 liters combustion gas just can reach warning concentration, this will cause the waste of a large amount of combustion gas, and most gas leakage is the quick leakage of big flow, can not according to the induction type safety valve of changes in flow rate identified leakage or switch obviously on energy-conservation in (waste of combustion gas) and the environmental protection (combustion gas is to the pollution of air) exist not enough, and the shutoff of this class safety valve action depends on the proper functioning of outside gas security, therefore when sensor impaired when malfunctioning this class safety valve can't work, such as external environment condition generation earthquake, accidental events such as gas pipeline generation high vibration, the pure solenoid valve with the control of gas concentration inductive control circuit of this class will be difficult to effectively play a role, and the solenoid valve that directly turn-offs gas pipeline is bigger because of driving force, therefore big and must user cost and the higher explosion-proof type solenoid valve of technological requirement by electric current, also make this class anti-leak safety valve, holding at high price of switch is difficult in the domestic consumer and extensively promotes; In addition, a kind of " the shockproof anti-leak inflammable gas of runout formula safety switch " disclosed for Chinese patent ZL200420074733.1 number, this safety switch adopts the hoodle valve of movable supporting on the gas channel between suction port and the air outlet to control the switching of blast tube, hoodle valve can float according to the pressure change that its both sides produce because of changes in flow rate and close blast tube, and this hoodle valve pedestal upper support has spring, this spring can be subjected to during such as earthquake and up and down fore and aft motion of vibrations, make the hoodle valve come-up close blast tube, but the action of this safety switch is subjected to the control of gas changes in flow rate fully, in the gas flow variation obviously is, when severe is leaked, hoodle valve can normally float and close, micro-leakage and variations in flow be hour at a slow speed but when gas, hoodle valve can't float and close, therefore this safety switch can't be worked during micro-leakage at a slow speed at gas, have serious potential safety hazard, can not be on market wide popularization and application.

The model utility content

The purpose of this utility model is to provide a kind of energy-saving environment protection type combustible gas intelligent safety valve of can be in gas pipeline, closing automatically immediately when severe is leaked, closing according to gas leakage concentration when little the leakage.

The technical solution of the utility model is: a kind of energy-saving environment protection type combustible gas intelligent safety valve, comprise valve body, on valve body, be provided with the suction port and the air outlet that communicate by the air flue in the valve body, air flue between suction port and the air outlet is provided with from the give vent to anger vertical valve pocket of side reducing of air inlet side direction, activity is equipped with the spool of bottom support on the spool supporting base in the valve pocket, it is characterized in that: described valve pocket suitable for reading is communicated with the disappointing road with the valve body exterior, the valve body top is fixed with the solenoid valve that can open and close air leaking nozzle by overhead guard, the lose heart air leaking nozzle in road and the valve plate corresponding matching of solenoid valve.

The sealing surface of the corresponding spool valve plate of described valve pocket is provided with the anti-corrosion layer structure, and the sealing surface that described air leaking nozzle external port contacts with the solenoid valve valve plate is provided with the anti-corrosion layer structure.

Be provided with corrosion resisting liner in the valve pocket of described valve body and the disappointing road, the sealing surface of the corresponding spool of corrosion resisting liner constitutes the anti-corrosion layer structure, and the sealing surface of the corresponding solenoid valve valve plate of corrosion resisting liner constitutes the anti-corrosion layer structure.

Being connected with on the described solenoid valve can be according to the gas concentration inductive control circuit of gas concentration control electromagnetic valve switching.

Described spool supporting base comprise the holding seat that contacts with spool and be connected in holding seat bottom can be when valve body vibrates the outstanding magazine spring of dilatation, outstanding magazine spring lower end is connected bottom valve body by link.

Described outstanding magazine spring lower end is connected with the valve body bottom by the vertical adjustment bar of spinning in the valve body bottom.

Described disappointing road vertically is provided with, and the end face center fixation of spool has guide rod, and guide rod is on the center line in the road that loses heart.

Safety valve of the present utility model can be taked different blocking ways automatically according to the character of gas leakage, realize realizing automatically little leakage blocking-up, the above leakage blocking-up of moderate and vibrations blocking-up, have intelligent characteristics, reached comprehensive automatic blocking-up, remedied existing gas valve can't be little the safety defect of leakage blocking-up, and can block the effect that reaches energy-conservation immediately leaking the moment of taking place when more than moderate, leaking.

Little leakage takes place in gas pipeline, when the little sensitivity to spool of air leakage is not enough to discern, can open the air leaking nozzle in the disappointing road of valve pocket connection suitable for reading by the valve plate of the gas concentration inductive control circuit control electromagnetic valve of peripheral hardware, because the gaseous-pressure in the valve pocket is greater than external atmospheric pressure, spool was moved valve pocket sealing suitable for reading on automatically in pressure difference effect following moment, block suction port and air outlet simultaneously, being communicated with of the road that loses heart, realize little leakage blocking-up; And after moving on the spool, because the gaseous-pressure of spool below air inlet side is higher than the give vent to anger pressure of side of spool top, at this moment the no matter valve plate of solenoid valve sealing or open, spool can not descend automatically, solenoid valve only need move once and not need to keep for a long time its action during therefore little leakage blocking-up, generally get final product in couple of seconds, the action of solenoid valve is an opening action in addition, required strength is very little, therefore optional with the lower solenoid valve of power in the utility model, the cost-effective while also need not be considered arc extinguishing (solenoid valve spark) problem.

When leaking more than the gas pipeline generation moderate, gas flow in the valve pocket is in case increase, on the spool, the air pressure balance of following both sides is promptly broken, on the differential pressure action lower valve core is rapid, move, with valve pocket sealing suitable for reading, thereby with the blocking-up of suction port and air outlet, realize leakproof, this blocking-up process moment that flow changes in valve pocket can finish, a large amount of combustion gas of can not running off, reach energy-conservation effect, after moving on the spool, because the combustion gas of spool downside is a high pressure with the valve pocket sealing, spool can not descend automatically, block very reliably,, close the combustion gas total valve when gas leakage after pipeline is repaired, owing to there is not absolute sealing, the interior combustion gas nature slowly-releasing of two or three minutes rear valve body, spool falls automatically, and air feed uses again.

In addition, if when sharp pounding such as earthquake takes place, spool is under the vibration of the spring of its bottom, and spool inflammable gas pressure up and down occurred uneven and causes and move on to the suitable for reading and sealing of valve pocket on the spool in moment, realized the vibrations blocking-up.

In addition, the sealing surface that the corrosion of valve inner is caused for the corrosive gas that prevents in the combustion gas uneven and cause poorly sealed, further cause the hidden danger of gas leakage, in valve pocket on the sealing surface of corresponding spool valve plate, on the sealing surface of the corresponding solenoid valve valve plate contact of air leaking nozzle external port, all be provided with the anti-corrosion layer structure, the anti-corrosion layer structure at this two place has improved the sealing reliability of spool and solenoid valve greatly, make the utility model when long-time the use, the valve plate that still can guarantee spool and solenoid valve contacts with the tight of sealing surface, stops gas leakage.Whole or split type corrosion resistant neck bush, the inner lining plate that is provided with in valve pocket that this anti-corrosion layer structure can be a valve body and the disappointing road, resistant materials such as the available stainless steel of the material of corrosion resisting liner, pottery.

Description of drawings

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

Embodiment

As shown in Figure 1, safety valve of the present utility model comprises valve body 1, on valve body 1, be provided with the suction port 2 and the air outlet 3 that communicate by the air flue in the valve body, air flue between suction port 2 and the air outlet 3 is provided with from the give vent to anger vertical valve pocket 4 of side reducing of air inlet side direction, the cross section of valve pocket 4 for down big little trapezoidal, activity is equipped with the spool 9 of outside dimension between valve pocket 4 sizes suitable for reading and end opening size in the valve pocket 4, the bottom support of spool 9 is on the spool supporting base, the spool supporting base comprises the holding seat 8 that contacts with spool 9, be connected in the outstanding magazine spring 6 of holding seat 8 bottoms, be connected in the vertical adjustment bar 7 of outstanding magazine spring 6 bottoms, vertical adjustment bar 7 spinnings are in valve body 1 bottom.The top of valve pocket 4 is communicated with the disappointing road 5 with valve body 1 exterior, the end face center fixation of spool 9 has vertical guide rod 10, guide rod 10 is on the center line in the road 5 that loses heart, the air leaking nozzle top in disappointing road 5 is provided with the solenoid valve 11 that is supported and fixed on the valve body overhead guard, solenoid valve 11 can open and close air leaking nozzle, solenoid valve 11 has the valve plate 12 with the air leaking nozzle corresponding matching in disappointing road 5, under normal circumstances valve plate 12 sealing covers are contained on the air leaking nozzle in the road 5 that loses heart, air leaking nozzle sealing with the road 5 that loses heart, being connected with on the solenoid valve 11 can be according to the gas concentration inductive control circuit 13 of gas concentration control electromagnetic valve switching, gas concentration inductive control circuit 13 is reported to the police when combustion gas reaches finite concentration in the room and is sent opening signal for solenoid valve 11, and the valve plate 12 of solenoid valve 11 rises 5 the air leaking nozzle of will losing heart to be opened with the external world and communicate.Be set with the corrosion resisting liner 14 of the shell-like that the bottom is big, top is little in the valve pocket 4 and the road 5 that loses heart, liner 14 inserts from the bottom of valve pocket 4, the external port of liner 14 upper ends is fixed on the valve body outside with jump ring 15, the sealing surface of these corrosion resisting liner 14 corresponding spools 9 constitutes the anti-corrosion layer structure, and the sealing surface of the corresponding solenoid valve valve plate of the air leaking nozzle of these corrosion resisting liner 14 external port constitutes the anti-corrosion layer structure.Inner lining material can be selected resistant materials such as the stainless steel, pottery of anti-sulfur dioxide and other corrosive gas oxidations for use.

Safety valve of the present utility model before use, at first the burner situation according to the user is adjusted to proper height by vertical adjustment bar 7 with the spool in the safety valve 9, make spool 9 under the maximum gas flow of normal use reach flow increase again spool 9 will on move closeding valve cavity 4 borderline balance state suitable for reading.

In use, if gas pipeline generation moderate or severe are leaked, gas flow in the valve pocket 4 is in case increase, on the spool 9, the air pressure balance of following both sides is promptly broken, move on rapidly at differential pressure action lower valve core 9, with the valve pocket 4 tops sealing of reducing, thereby with suction port 2 and air outlet 3 blocking-up, realize leakproof, this blocking-up process moment that flow changes in valve pocket 4 can finish, and a large amount of combustion gas of can not running off reaches energy-conservation effect, after moving on the spool 9 with valve pocket 4 sealings, because the gaseous-pressure of spool 9 below air inlet sides is higher than the give vent to anger pressure of side of spool 9 tops, spool 9 can not descend automatically, blocks very reliable, after the gas leakage pipeline is repaired, close the combustion gas total valve, owing to there is not an absolute sealing, the combustion gas nature slowly-releasing in the two or three minutes rear valve body 1, spool 9 falls, and air feed uses again.

In use, if little leakage that gas pipeline generation changes in flow rate is minimum, when little sensitivity to spool 9 is not enough to discern, when leakage rate reaches finite concentration (far below explosion ratio), gas concentration inductive control circuit 13 report to the police and the valve plate 12 of control electromagnetic valve 11 on move and open the suitable for reading of the disappointing road 5 that is communicated with valve pocket 4 tops, because the gaseous-pressure in the valve pocket 4 is greater than external atmospheric pressure, the pressure balance of spool 9 both sides is broken, move on the spool 9 valve pocket 4 sealings, block suction port 2 and air outlet 3 simultaneously, the connection in disappointing road 5, after moving on the spool 9, because the combustion gas of spool 9 below air inlet sides is a high pressure, no matter valve plate 12 sealings of solenoid valve 11 or open, spool 9 can not descend automatically, after only closing the combustion gas total valve, spool 9 just can move down and reset, therefore 11 of gas concentration inductive control circuit 13 and solenoid valves need action once and not to need to keep for a long time action, generally get final product in couple of seconds, and the action of solenoid valve 11 is an opening action, required strength is very little, therefore optional with the lower solenoid valve of power, the cost-effective while need not consider that also solenoid valve produces the problem of spark.

Claims

1, a kind of energy-saving environment protection type combustible gas intelligent safety valve, comprise valve body, on valve body, be provided with the suction port and the air outlet that communicate by the air flue in the valve body, air flue between suction port and the air outlet is provided with from the give vent to anger vertical valve pocket of side reducing of air inlet side direction, activity is equipped with the spool of bottom support on the spool supporting base in the valve pocket, it is characterized in that: described valve pocket suitable for reading is communicated with the disappointing road with the valve body exterior, the valve body top is fixed with the solenoid valve that can open and close air leaking nozzle by overhead guard, the lose heart air leaking nozzle in road and the valve plate corresponding matching of solenoid valve.

2, safety valve according to claim 1 is characterized in that: the sealing surface of the corresponding spool valve plate of described valve pocket is provided with the anti-corrosion layer structure, and the sealing surface that described air leaking nozzle external port contacts with the solenoid valve valve plate is provided with the anti-corrosion layer structure.

3, safety valve according to claim 2, it is characterized in that: be provided with corrosion resisting liner in the valve pocket of described valve body and the disappointing road, the sealing surface of the corresponding spool of corrosion resisting liner constitutes the anti-corrosion layer structure, and the sealing surface of the corresponding solenoid valve valve plate of corrosion resisting liner constitutes the anti-corrosion layer structure.

4, safety valve according to claim 3 is characterized in that: described corrosion resisting liner is a stainless steel inner lining.

5, safety valve according to claim 3 is characterized in that: described corrosion resisting liner is ceramic-lined.

6, according to any described safety valve in the claim 1～5, it is characterized in that: being connected with on the described solenoid valve can be according to the gas concentration inductive control circuit of gas concentration control electromagnetic valve switching.

7, safety valve according to claim 6, it is characterized in that: described spool supporting base comprise the holding seat that contacts with spool and be connected in holding seat bottom can be when valve body vibrates the outstanding magazine spring of dilatation, outstanding magazine spring lower end is connected bottom valve body by link.

8, safety valve according to claim 7 is characterized in that: described outstanding magazine spring lower end is connected with the valve body bottom by the vertical adjustment bar of spinning in the valve body bottom.

9, safety valve according to claim 8 is characterized in that: described disappointing road vertically is provided with, and the end face center fixation of spool has guide rod, and guide rod is on the center line in the road that loses heart.