CN104329943A - Leakage detection method for automatic cut-off valve and RH circulation air valve device - Google Patents
Leakage detection method for automatic cut-off valve and RH circulation air valve device Download PDFInfo
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- CN104329943A CN104329943A CN201410490388.8A CN201410490388A CN104329943A CN 104329943 A CN104329943 A CN 104329943A CN 201410490388 A CN201410490388 A CN 201410490388A CN 104329943 A CN104329943 A CN 104329943A
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Abstract
The invention discloses a leakage detection method for an automatic cut-off valve and an RH circulation air valve device. When a first leakage checking stop door and a second leakage checking stop door are respectively in a closed state, the first air flow rate corresponding to the circulation air valve device is obtained; when the first air flow rate is zero, a first automatic switching valve and the second leakage checking stop door are controlled to be respectively in the closed state, in addition, a second automatic switching valve and the first leakage checking stop door are respectively in an open state, and the second air flow rate is obtained; the second automatic switching valve and the first leakage checking stop door are controlled to be respectively in the closed state, in addition, the first automatic switching valve and the second leakage checking stop door are respectively in the open state, and the third air flow rate is obtained; and whether the first and second automatic cut-off valves are in an air leakage state or not is determined on the basis of the second air flow rate and the third air flow rate.
Description
Technical field
The present invention relates to field of steel metallurgy, particularly relate to a kind of leakage detection method and RH circulating air valve gear of automatic stop valve.
Background technology
At present in molten steel furnace external refining technology, molten steel vacuum circulation degassing (Ruhrstahl Heraeus, be called for short RH) vacuum refining furnace as the most universal be also promote the fastest a kind of refining means, and the principle of RH is blown into inert gas in the tedge of dip pipe, further reduction molten steel density, make molten steel spray in vacuum chamber, complete degassed and object that is alloying at internal vacuum chamber.
Argon gas and nitrogen two media is typically used to serve as recyclegas in prior art, nitrogen only just uses when smelting the steel of special kinds, steel grade nitrogen for the overwhelming majority is all harmful element, so use which type of recyclegas for which type of kind in smelting process, two kinds of gases never can be used with.
But, the design of existing circulating air valve gear is that tow channel gas is merged into a road gas in valve cabinet, which kind of realize using gas to smelt by the automatic stop valve controlled in described circulating air valve gear, but in actual production process, often occur that automatic stop valve fits badly phenomenon, leak gas, once can not Timeliness coverage, molten steel composition be produced a very large impact molten steel composition, cause the significant impacts such as composition is offscale, waste product.
Summary of the invention
The invention provides a kind of leakage detection method and RH circulating air valve gear of automatic stop valve, can shorten and judge whether the inner automatic stop valve of RH circulation air valve cabinet is in the time of gas leakage state, reduce circulating air automatic stop valve and fit badly the impact of collaborating mutually on steel quality when smelting.
The application one embodiment provides a kind of leakage detection method of automatic stop valve, and be applied in RH circulating air valve gear, described circulating air valve gear comprises the first automatic stop valve, the second automatic transfer valve, the first admission line and the second admission line, comprising:
All closed condition is at the first leakage detection pipe valve and the second leakage detection pipe valve, and described first automatic stop valve and described second automatic transfer valve are when being all in open mode, obtain first gas flow corresponding with described circulating air valve gear, wherein, described first leakage detection pipe valve is arranged on described first admission line before described first automatic stop valve, and described second leakage detection pipe valve is arranged on described second admission line before described second automatic stop valve;
When described first gas flow is zero, control described first automatic transfer valve and described second leakage detection pipe valve is all in described closed condition, and described second automatic transfer valve and described first leakage detection pipe valve are all in described open mode, obtain second gas flow corresponding with described circulating air valve gear; And
When described first gas flow is zero, control described second automatic transfer valve and described first leakage detection pipe valve is all in described closed condition, and described first automatic transfer valve and described second leakage detection pipe valve are all in described open mode, obtain three gas flow corresponding with described circulating air valve gear;
Based on described second gas flow and described 3rd gas flow, determine whether described first automatic stop valve and described second automatic stop valve are in gas leakage state.
Optionally, described first automatic transfer valve of described control and described second leakage detection pipe valve are all in described closed condition, and described second automatic transfer valve and described first leakage detection pipe valve are all in described open mode, obtain second gas flow corresponding with described circulating air valve gear, specifically comprise:
Control described first automatic transfer valve and described second leakage detection pipe valve is all in described closed condition, and described second automatic transfer valve and described first leakage detection pipe valve are all in described open mode, after the first Preset Time, obtain described second gas flow.
Optionally, described second automatic transfer valve of described control and described first leakage detection pipe valve are all in described closed condition, and described first automatic transfer valve and described second leakage detection pipe valve are all in described open mode, obtain three gas flow corresponding with described circulating air valve gear, specifically comprise:
Control described second automatic transfer valve and described first leakage detection pipe valve is all in described closed condition, and described first automatic transfer valve and described second leakage detection pipe valve are all in described open mode, after the second Preset Time, obtain described 3rd gas flow.
Optionally, described first Preset Time is identical with the value of described second Preset Time.
Optionally, described based on described second gas flow and described 3rd gas flow, determine whether described first automatic stop valve and described second automatic stop valve are in gas leakage state, specifically comprise:
Based on described second gas flow, determine whether described first automatic stop valve is in gas leakage state;
Based on described 3rd gas flow, determine whether described second automatic stop valve is in gas leakage state.
Optionally, described based on described second gas flow, determine whether described first automatic stop valve is in gas leakage state, specifically comprises:
When described second gas flow is zero, then determine that described first automatic stop valve is not in described gas leakage state;
When described second gas flow is non-vanishing, then determine that described first automatic stop valve is in described gas leakage state.
Optionally, described based on described 3rd gas flow, determine whether described second automatic stop valve is in gas leakage state, specifically comprises:
When described 3rd gas flow is zero, then determine that described second automatic stop valve is not in described gas leakage state;
When described 3rd gas flow is non-vanishing, then determine that described second automatic stop valve is in described gas leakage state.
The application another embodiment still provides a kind of RH circulating air valve gear, comprise the first automatic stop valve, second automatic transfer valve, first admission line, second admission line, connecting pipe, first leakage detection pipe valve, second leakage detection pipe valve and flowmeter, wherein, rear end and the described connecting pipe of described first admission line are connected, rear end and the described connecting pipe of described second admission line are connected, described first leakage detection pipe valve is arranged on the front end of described first admission line, described first automatic stop valve is arranged on described first admission line after described first leakage detection pipe valve, described second leakage detection pipe valve is arranged on the front end of described second admission line, and described second automatic stop valve is arranged on described second admission line after described second leakage detection pipe valve, and described flowmeter is arranged on described connecting pipe.
Optionally, also comprise:
First flow adjusting device, is arranged on described first admission line after described first automatic stop valve;
Second quantity regulating device, is arranged on described second admission line after described second automatic stop valve.
Optionally, the rear end of described connecting pipe is divided into 4 road pipelines, and described flowmeter all arranges one on each the road pipeline ducted of described 4 tunnels.
Based on technique scheme, in the embodiment of the present invention, due to the first gas flow be zero time, just obtain the second gas flow and the 3rd gas flow, and described first gas flow obtains when the first leakage detection pipe valve and the second leakage detection pipe valve are all in closed condition, namely characterize the first and second leakage detection pipe valves can be closed tight, make when closing described second leakage detection pipe valve and the first automatic transfer valve, the second gas flow of acquisition is more accurate, and make when closing a described leakage detection pipe valve and the second automatic transfer valve, the 3rd gas flow obtained is more accurate, and then according to described second, 3rd gas flow, determine described first, whether the second automatic transfer valve is in described leak condition, so, make just can determine described first by above-mentioned 3 steps, whether the second automatic stop valve is in gas leakage state, make the step of leakage detection less, and the time that leakage detection step uses is also shorter, and then make to judge that the time whether automatic stop valve is in gas leakage state is shortened, the impact of collaborating mutually on steel quality when smelting is fitted badly to reduce circulating air automatic stop valve.
Accompanying drawing explanation
Fig. 1 is the flow chart of the leakage detection method of automatic stop valve of the present invention;
Fig. 2 is the structural representation of RH circulating air valve gear of the present invention.
In figure, appended with drawings mark is as follows:
10---the first automatic stop valve, 11---the first leakage detection pipe valve, 12---the first leakage detection pipe valve, 13---first flow adjusting device, 14---shell, 20---the second admission line, 21---the second leakage detection pipe valve, 22---the second automatic transfer valve, 23---second quantity regulating device, 30---connecting pipe, 31---the first via pipeline of connecting pipe 30, 32---the second road pipeline of connecting pipe 30, 33---the three-way connection (pipe) road of connecting pipe 30, 34---the 4th road pipeline of connecting pipe 30, 35---flowmeter, 36---flowmeter, 37---flowmeter, 38---flowmeter.
Detailed description of the invention
The invention provides a kind of leakage detection method and RH circulating air valve gear of automatic stop valve, can shorten and judge whether the inner automatic stop valve of RH circulation air valve cabinet is in the time of gas leakage state, reduce circulating air automatic stop valve and fit badly the impact of collaborating mutually on steel quality when smelting.
Below in conjunction with accompanying drawing and embodiment, above technical scheme is explained in detail and is illustrated.
As shown in Figure 1, in the embodiment of the present invention, a kind of leakage detection method of automatic stop valve, is applied in RH circulating air valve gear, described circulating air valve gear comprises the first automatic stop valve, the second automatic transfer valve, the first admission line and the second admission line, and its detailed process is as follows:
Step 101: be all in closed condition at the first leakage detection pipe valve and the second leakage detection pipe valve, and described first automatic stop valve and described second automatic transfer valve are when being all in open mode, obtain first gas flow corresponding with described circulating air valve gear, wherein, described first leakage detection pipe valve is arranged on described first admission line before described first automatic stop valve, and described second leakage detection pipe valve is arranged on described second admission line before described second automatic stop valve;
Step 102: when described first gas flow is zero, control described first automatic transfer valve and described second leakage detection pipe valve is all in described closed condition, and described second automatic transfer valve and described first leakage detection pipe valve are all in described open mode, obtain second gas flow corresponding with described circulating air valve gear;
Step 103: and when described first gas flow is zero, control described second automatic transfer valve and described first leakage detection pipe valve is all in described closed condition, and described first automatic transfer valve and described second leakage detection pipe valve are all in described open mode, obtain three gas flow corresponding with described circulating air valve gear;
Step 104: based on described second gas flow and described 3rd gas flow, determines whether described first automatic stop valve and described second automatic stop valve are in gas leakage state.
Wherein, the structure of described RH circulating air valve gear is concrete as shown in Figure 2, described RH circulating air valve gear comprises the first automatic stop valve 12, second automatic transfer valve 22, first admission line 10, second admission line 20, connecting pipe 30, first leakage detection pipe valve 11, second leakage detection pipe valve 21, flowmeter 35, flowmeter 36, flowmeter 37 and flowmeter 38.
Wherein, rear end and the connecting pipe 30 of the first admission line 10 are connected, rear end and the connecting pipe 30 of the second admission line 20 are connected, first leakage detection pipe valve 11 is arranged on the front end of the first admission line 10, and the first automatic stop valve 12 is arranged on the first admission line 10 after the first leakage detection pipe valve 11; Second leakage detection pipe valve 21 is arranged on the front end of the second admission line 20, second automatic stop valve 22 is arranged on the second admission line 20 after the second leakage detection pipe valve 21, and flowmeter 35, flowmeter 36, flowmeter 37 and flowmeter 38 are all arranged on connecting pipe 30.
Further, the first automatic stop valve 12 and the second automatic transfer valve 22 can receive remote control signal, control the first automatic stop valve 12 and the second automatic transfer valve 22 opens and closes by described remote control signal.
Concrete, can lead to nitrogen or argon gas in the first admission line 10, also can lead to nitrogen or argon gas in the second admission line 20, wherein, in the first admission line 10 during logical nitrogen, the second admission line 20 is for logical argon gas; And in the first admission line 10 during logical argon gas, the second admission line 20 is for logical nitrogen, and the first admission line 10 and the ventilation of the second admission line 20 separate, and namely when the first admission line 10 is ventilated, ventilation forbidden by the second admission line 20; And when the second admission line 20 is ventilated, ventilation forbidden by the first admission line 10.
Concrete, described RH circulating air valve gear also comprises first flow adjusting device 13 and second quantity regulating device 23, and wherein, first flow adjusting device 13 is arranged on the first admission line 10 after the first automatic stop valve 12; Second quantity regulating device 23 is arranged on the second admission line 20 after the second automatic stop valve 22.
Concrete, described RH circulating air valve gear also comprises shell 14, for by the first automatic stop valve 12, second automatic transfer valve 22, first flow adjusting device 13 and second quantity regulating device 23 are arranged in shell 14, prevent the first automatic stop valve 12, second automatic transfer valve 22, first flow adjusting device 13 and second quantity regulating device 23 affected by environment and damage, improve the first automatic stop valve 12, second automatic transfer valve 22, the service life of first flow adjusting device 13 and second quantity regulating device 23.
Concrete, the rear end of connecting pipe 30 is divided into 4 road pipelines, described 4 road pipelines comprise first via pipeline 31, second road pipeline 32, three-way connection (pipe) road 33 and the 4th road pipeline 34, first via pipeline 31, second road pipeline 32, three-way connection (pipe) road 33 and the 4th road pipeline 34 are arranged in order from top to bottom, and flowmeter 35 is provided with on first via pipeline 31, second road pipeline 32 is provided with flowmeter 36, three-way connection (pipe) road 31 is provided with flowmeter 37, and flowmeter 38 is provided with on the 4th road pipeline 34, so, make described 4 tunnels each road pipeline ducted is provided with a flowmeter, the gas flow entering described RH vacuum refining furnace is detected by 4 flowmeters.
Certainly, the rear end of connecting pipe 30 also only can arrange a road pipeline, so, can arrange a flowmeter on this road pipeline, obtains second, third gas flow described with this.
Wherein, in a step 101, be all in closed condition at the first leakage detection pipe valve and the second leakage detection pipe valve, and when described first automatic stop valve and described second automatic transfer valve are all in open mode, obtain first gas flow corresponding with described circulating air valve gear.
In specific implementation process, see Fig. 2, when the first leakage detection pipe valve 11 is closed, the first leakage detection pipe valve 11 is in described closed condition; In like manner, when the second leakage detection pipe valve 21 is closed, the second leakage detection pipe valve 21 is in described closed condition; And first automatic stop valve 12 when opening, the first automatic stop valve 12 is in described open mode, and in like manner, when the second automatic stop valve 22 is opened, the second automatic stop valve 22 is in described open mode.
Specifically, all be closed at the first leakage detection pipe valve 11 and the second leakage detection pipe valve 21, and the first automatic stop valve 12 and the second automatic stop valve 22 are when being all opened, can by being arranged on the gas flow of 4 flowmeters measurements on connecting pipe 30 by connecting pipe 30, described first gas flow is obtained with this, when described first gas flow is zero, then shows that the first leakage detection pipe valve 11 and the second leakage detection pipe valve 21 are closed tight all, can not leak gas; Otherwise show that the first leakage detection pipe valve 11 and the second leakage detection pipe valve 21 are not closed tight, there will be gas leakage situation.
Following execution step 102, in this step, when described first gas flow is zero, control described first automatic transfer valve and described second leakage detection pipe valve is all in described closed condition, and described second automatic transfer valve and described first leakage detection pipe valve are all in described open mode, obtain second gas flow corresponding with described circulating air valve gear.
In specific implementation process, see Fig. 2, when described first gas flow is zero, then show that the first leakage detection pipe valve 11 and the second leakage detection pipe valve 21 are closed tight all, can not leak gas, so, detection first automatic stop valve 12 and the second automatic stop valve 22 can be made whether to be in gas leakage state not by the impact of flowing gas, to improve the accuracy detected.
Specifically, when described first gas flow is zero, the first automatic transfer valve 12 can be controlled and the second leakage detection pipe valve 21 is closed by teleinstruction, the first automatic transfer valve 12 and the second leakage detection pipe valve 21 is made all to be in described closed condition, and the second automatic transfer valve 22 can be controlled by teleinstruction and the first leakage detection pipe valve 11 is opened, the second automatic transfer valve 22 and the first leakage detection pipe valve 11 is made all to be in described open mode, then by being arranged on 4 flowmeters on connecting pipe 30, the gas flow by connecting pipe 30 is measured with this, namely described second gas flow is got.
Specifically, because the second leakage detection pipe valve 21 is in described closed condition, known by step 101, second leakage detection pipe valve 21 can be closed tight, make the gas in the second admission line 20 can not cross the second leakage detection pipe valve 21, enter in connecting pipe 30, only when the first automatic transfer valve 12 is not closed tight, gas in first admission line 10 can enter into connecting pipe 30 through the first space, make described second gas flow non-vanishing, wherein, described first space is not for when the first automatic transfer valve 12 is closed tight, space between first automatic transfer valve 12 and the first pipeline 10, and when the first automatic transfer valve 12 is closed tight, gas in first admission line 10 can not be crossed the first automatic transfer valve 12 and enter into connecting pipe 30, namely described second gas flow is made to be zero, so, can determine whether the first automatic transfer valve 12 is in described gas leakage state by described second gas flow.
In another embodiment, described first automatic transfer valve of described control and described second leakage detection pipe valve are all in described closed condition, and described second automatic transfer valve and described first leakage detection pipe valve are all in described open mode, obtain second gas flow corresponding with described circulating air valve gear, specifically comprise: control described first automatic transfer valve and described second leakage detection pipe valve is all in described closed condition, and described second automatic transfer valve and described first leakage detection pipe valve are all in described open mode, after the first Preset Time, obtain described second gas flow.
Concrete, when described first gas flow is zero, control the first automatic transfer valve 12 and the second leakage detection pipe valve 21 is all in described closed condition, and the second automatic transfer valve 22 and the first leakage detection pipe valve 11 are all in described open mode, then by being arranged on 4 flowmeters on connecting pipe 30, , then described first Preset Time is stablized, again by being arranged on 4 flowmeters on connecting pipe 30, the gas flow by connecting pipe 30 is measured with this, namely described second gas flow is got, wherein, described first Preset Time is such as 5s (second), 10s is equivalent, by stablizing described first Preset Time, originally the gas in the first admission line 10 can be flowed out from connecting pipe 30, can make by described second gas flow of 4 flowmeters acquisitions more accurate, and then more accurately can judge whether the second automatic transfer valve 22 is in described gas leakage state.
Following execution step 103, in this step, and when described first gas flow is zero, control described second automatic transfer valve and described first leakage detection pipe valve is all in described closed condition, and described first automatic transfer valve and described second leakage detection pipe valve are all in described open mode, obtain three gas flow corresponding with described circulating air valve gear.
Wherein, first can perform step 103, then perform step 102, the application does not do concrete restriction.
In specific implementation process, see Fig. 2, when described first gas flow is zero, then show that the first leakage detection pipe valve 11 and the second leakage detection pipe valve 21 are closed tight all, can not leak gas, so, detection first automatic stop valve 12 and the second automatic stop valve 22 can be made whether to be in gas leakage state not by the impact of flowing gas, to improve the accuracy detected.
Specifically, when described first gas flow is zero, the first automatic transfer valve 12 can be controlled and the second leakage detection pipe valve 21 is opened by teleinstruction, the first automatic transfer valve 12 and the second leakage detection pipe valve 21 is made all to be in described open mode, and the second automatic transfer valve 22 can be controlled by teleinstruction and the first leakage detection pipe valve 11 is closed, the second automatic transfer valve 22 and the first leakage detection pipe valve 11 is made all to be in described closed condition, then by being arranged on 4 flowmeters on connecting pipe 30, the gas flow by connecting pipe 30 is measured with this, namely described 3rd gas flow is got.
Specifically, because the first leakage detection pipe valve 11 is in described closed condition, known by step 101, first leakage detection pipe valve 11 can be closed tight, make the gas in the first admission line 10 can not cross the first leakage detection pipe valve 11, enter in connecting pipe 30, only when the second automatic transfer valve 22 is not closed tight, gas in second admission line 20 can enter into connecting pipe 30 through Second gap, make described 3rd gas flow non-vanishing, wherein, described Second gap is not for when the second automatic transfer valve 22 is closed tight, space between second automatic transfer valve 22 and the first pipeline 10, and when the second automatic transfer valve 22 is closed tight, the gas in the second admission line 20 can not be crossed the second automatic transfer valve 22 and enter into connecting pipe 30, described 3rd gas flow is namely made to be zero, so, can determine whether the second automatic transfer valve 22 is in described gas leakage state by described 3rd gas flow.
In another embodiment, described second automatic transfer valve of described control and described first leakage detection pipe valve are all in described closed condition, and described first automatic transfer valve and described second leakage detection pipe valve are all in described open mode, obtain three gas flow corresponding with described circulating air valve gear, specifically comprise: control described second automatic transfer valve and described first leakage detection pipe valve is all in described closed condition, and described first automatic transfer valve and described second leakage detection pipe valve are all in described open mode, after the second Preset Time, obtain described 3rd gas flow.
Concrete, when described first gas flow is zero, control the first automatic transfer valve 12 and the second leakage detection pipe valve 21 is all in described open mode, second automatic transfer valve 22 and the first leakage detection pipe valve 11 are all in described closed condition, then described second Preset Time is stablized, again by being arranged on 4 flowmeters on connecting pipe 30, the gas flow by connecting pipe 30 is measured with this, namely described 3rd gas flow is got, wherein, described second Preset Time is such as 5s, 8s, 10s is equivalent, by stablizing described second Preset Time, originally the gas in the second admission line 20 can be flowed out from connecting pipe 30, can make by described 3rd gas flow of 4 flowmeters acquisitions more accurate, and then more accurately can judge whether the first automatic transfer valve 12 is in described gas leakage state.
Wherein, the first automatic transfer valve 12 is in described closed condition process, when leaking air, then characterizes the first automatic transfer valve 12 and is in described gas leakage state, if when not leaking air, then characterizes the first automatic transfer valve 12 and is not in described gas leakage state; In like manner, the second automatic transfer valve 22 is in described closed condition process, when leaking air, then characterizes the second automatic transfer valve 22 and is in described gas leakage state, if when not leaking air, then characterizes the second automatic transfer valve 22 and is not in described gas leakage state.
Concrete, described first Preset Time is identical with the value of described second Preset Time, it is equivalent that such as described first Preset Time and described second Preset Time can be 10s or 5s, certainly, described first Preset Time also can not be identical with the value of described second Preset Time, and the application does not do concrete restriction.
Following execution step 104, in this step, based on described second gas flow and described 3rd gas flow, determines whether described first automatic stop valve and described second automatic stop valve are in gas leakage state.
In specific implementation process, based on described second gas flow, determine whether described first automatic stop valve is in gas leakage state; Based on described 3rd gas flow, determine whether described second automatic stop valve is in gas leakage state.
Specifically, described based on described second gas flow, when determining whether described first automatic stop valve is in gas leakage state, if when described second gas flow is zero, then determine that described second automatic stop valve is not in described gas leakage state; If when described second gas flow is non-vanishing, then determine that described second automatic stop valve is in described gas leakage state.
Concrete, see Fig. 2, because the second leakage detection pipe valve 21 is in described closed condition, known by step 101, second leakage detection pipe valve 21 can be closed tight, make the gas in the second admission line 20 can not cross the second leakage detection pipe valve 21, enter in connecting pipe 30, only when the first automatic transfer valve 12 is not closed tight, gas in first admission line 10 can enter into connecting pipe 30 through the first space, make described second gas flow non-vanishing, so, make when detecting that described second gas flow is zero, then can determine that the first automatic transfer valve 12 is closed tight, namely characterize the first automatic transfer valve 12 and be not in described gas leakage state, if when detecting that described second gas flow is non-vanishing, then can determine that the first automatic transfer valve 12 is not closed tight, namely characterize the first automatic transfer valve 12 and be in described gas leakage state.
Further, described based on described 3rd gas flow, when determining whether described second automatic stop valve is in gas leakage state, if when described 3rd gas flow is zero, then determine that described first automatic stop valve is not in described gas leakage state; If when described 3rd gas flow is non-vanishing, then determine that described first automatic stop valve is in described gas leakage state.
Concrete, see Fig. 2, because the first leakage detection pipe valve 11 is in described closed condition, known by step 101, first leakage detection pipe valve 11 can be closed tight, make the gas in the first admission line 10 can not cross the first leakage detection pipe valve 11, enter in connecting pipe 30, only when the second automatic transfer valve 22 is not closed tight, gas in second admission line 20 can enter into connecting pipe 30 through Second gap, make described 3rd gas flow non-vanishing, so, make when detecting that described 3rd gas flow is zero, then can determine that the second automatic transfer valve 22 is closed tight, namely characterize the second automatic transfer valve 22 and be not in described gas leakage state, if when detecting that described 3rd gas flow is non-vanishing, then can determine that the second automatic transfer valve 22 is not closed tight, namely characterize the second automatic transfer valve 22 and be in described gas leakage state.
In actual application, utilizing said method to judge fast, whether first, second automatic stop valve exists fits badly phenomenon, within two minutes, generally just can complete the judgement of leakage, provide guarantee for reducing labor intensity of operating staff and enhancing productivity.
Beneficial effect of the present invention is as follows:
In the embodiment of the present invention, based on technique scheme, in the embodiment of the present invention, due to the first gas flow be zero time, just obtain the second gas flow and the 3rd gas flow, and described first gas flow obtains when the first leakage detection pipe valve and the second leakage detection pipe valve are all in closed condition, namely characterizing the first and second leakage detection pipe valves can be closed tight, make when closing described second leakage detection pipe valve and the first automatic transfer valve, the second gas flow of acquisition is more accurate, and make when closing a described leakage detection pipe valve and the second automatic transfer valve, the 3rd gas flow obtained is more accurate, and then according to described second, 3rd gas flow, determine described first, whether the second automatic transfer valve is in described leak condition, so, make just can determine described first by above-mentioned 3 steps, whether the second automatic stop valve is in gas leakage state, make the step of leakage detection less, and the time that leakage detection step uses is also shorter, and then make to judge that the time whether automatic stop valve is in gas leakage state is shortened, the impact of collaborating mutually on steel quality when smelting is fitted badly to reduce circulating air automatic stop valve.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (10)
1. a leakage detection method for automatic stop valve, be applied in RH circulating air valve gear, described circulating air valve gear comprises the first automatic stop valve, the second automatic transfer valve, the first admission line and the second admission line, it is characterized in that, comprising:
All closed condition is at the first leakage detection pipe valve and the second leakage detection pipe valve, and described first automatic stop valve and described second automatic transfer valve are when being all in open mode, obtain first gas flow corresponding with described circulating air valve gear, wherein, described first leakage detection pipe valve is arranged on described first admission line before described first automatic stop valve, and described second leakage detection pipe valve is arranged on described second admission line before described second automatic stop valve;
When described first gas flow is zero, control described first automatic transfer valve and described second leakage detection pipe valve is all in described closed condition, and described second automatic transfer valve and described first leakage detection pipe valve are all in described open mode, obtain second gas flow corresponding with described circulating air valve gear; And
When described first gas flow is zero, control described second automatic transfer valve and described first leakage detection pipe valve is all in described closed condition, and described first automatic transfer valve and described second leakage detection pipe valve are all in described open mode, obtain three gas flow corresponding with described circulating air valve gear;
Based on described second gas flow and described 3rd gas flow, determine whether described first automatic stop valve and described second automatic stop valve are in gas leakage state.
2. the method for claim 1, it is characterized in that, described first automatic transfer valve of described control and described second leakage detection pipe valve are all in described closed condition, and described second automatic transfer valve and described first leakage detection pipe valve are all in described open mode, obtain second gas flow corresponding with described circulating air valve gear, specifically comprise:
Control described first automatic transfer valve and described second leakage detection pipe valve is all in described closed condition, and described second automatic transfer valve and described first leakage detection pipe valve are all in described open mode, after the first Preset Time, obtain described second gas flow.
3. method as claimed in claim 2, it is characterized in that described second automatic transfer valve of described control and described first leakage detection pipe valve are all in described closed condition, and described first automatic transfer valve and described second leakage detection pipe valve are all in described open mode, obtain three gas flow corresponding with described circulating air valve gear, specifically comprise:
Control described second automatic transfer valve and described first leakage detection pipe valve is all in described closed condition, and described first automatic transfer valve and described second leakage detection pipe valve are all in described open mode, after the second Preset Time, obtain described 3rd gas flow.
4. method as claimed in claim 3, it is characterized in that, described first Preset Time is identical with the value of described second Preset Time.
5. method as claimed in claim 4, is characterized in that, described based on described second gas flow and described 3rd gas flow, determines whether described first automatic stop valve and described second automatic stop valve are in gas leakage state, specifically comprise:
Based on described second gas flow, determine whether described first automatic stop valve is in gas leakage state;
Based on described 3rd gas flow, determine whether described second automatic stop valve is in gas leakage state.
6. method as claimed in claim 5, is characterized in that, described based on described second gas flow, determines whether described first automatic stop valve is in gas leakage state, specifically comprises:
When described second gas flow is zero, then determine that described first automatic stop valve is not in described gas leakage state;
When described second gas flow is non-vanishing, then determine that described first automatic stop valve is in described gas leakage state.
7. method as claimed in claim 5, is characterized in that, described based on described 3rd gas flow, determines whether described second automatic stop valve is in gas leakage state, specifically comprises:
When described 3rd gas flow is zero, then determine that described second automatic stop valve is not in described gas leakage state;
When described 3rd gas flow is non-vanishing, then determine that described second automatic stop valve is in described gas leakage state.
8. a RH circulating air valve gear, it is characterized in that, comprise the first automatic stop valve, the second automatic transfer valve, the first admission line, the second admission line, connecting pipe, first leakage detection pipe valve, the second leakage detection pipe valve and flowmeter, wherein, rear end and the described connecting pipe of described first admission line are connected, rear end and the described connecting pipe of described second admission line are connected, described first leakage detection pipe valve is arranged on the front end of described first admission line, and described first automatic stop valve is arranged on described first admission line after described first leakage detection pipe valve; Described second leakage detection pipe valve is arranged on the front end of described second admission line, and described second automatic stop valve is arranged on described second admission line after described second leakage detection pipe valve, and described flowmeter is arranged on described connecting pipe.
9. RH circulating air valve gear as claimed in claim 8, is characterized in that, also comprise:
First flow adjusting device, is arranged on described first admission line after described first automatic stop valve;
Second quantity regulating device, is arranged on described second admission line after described second automatic stop valve.
10. RH circulating air valve gear as claimed in claim 9, it is characterized in that, the rear end of described connecting pipe is divided into 4 road pipelines, and described flowmeter all arranges one on each the road pipeline ducted of described 4 tunnels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410490388.8A CN104329943B (en) | 2014-09-23 | 2014-09-23 | The leakage detection method of a kind of automatic stop valve and RH circulating air valve gear |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111413049A (en) * | 2020-03-04 | 2020-07-14 | 首钢京唐钢铁联合有限责任公司 | Method and device for detecting leakage of heating furnace burner quick-cutting valve |
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