KR100828487B1 - An equipment for inspecting error action of diaphram valve - Google Patents

Abstract

The present invention is provided with a malfunction detection device at the pressure outlet of the diaphragm valve to detect the malfunction of the valve to prevent the differential pressure rise inside the dust collector due to the malfunction of the valve, and to act quickly when an abnormality occurs diaphragm valve malfunction Detecting device, the malfunction detection device of the diaphragm valve according to the present invention is mounted to the pressure outlet of the diaphragm valve and moves up and down by the instantaneous pressure released in the pulse (11-3); A body part 11-4 provided with a stopper 11-5 at an inner side thereof so that the inner ball 11-3 may be seated thereon; A cap 11-1 provided on an upper portion of the body portion 11-4 and including a limit switch for detecting an abnormal occurrence of pulse operation by a time when the inner ball 11-3 contacts; And a timer for receiving a pulse operation signal from a limit switch inside the cap 11-1 and outputting the output to the electronic gas blocking electronic valve 11-6 when an abnormal operation of the pulse occurs. And an input / output terminal box 11-9 for selectively closing 11-11.

Diaphragm valve, detection of malfunction, prevention of differential pressure increase inside the dust collector

Description

Diaphragm Valve Malfunction Detection Device {An equipment for inspecting error action of diaphram valve}             

1 is an exemplary view showing a situation that the dust inside the dust collector in the conventional pulse jet type dust collector.

Figure 2 is a state diagram showing the operating state of the diaphragm valve which is a filter cloth dust cleaning device in FIG.

3 is a state diagram in which a diaphragm valve malfunction detection device according to the present invention is attached to a pressure exhaust port of a diaphragm valve.

Figure 4 is an exploded perspective view showing a diaphragm valve malfunction detection apparatus according to the present invention.

Figure 5 is a perspective view showing a combined state of the diaphragm valve malfunction detection device according to the present invention.

Figure 6 is a state diagram showing the operating state in the normal operation of the diaphragm valve in the diaphragm valve malfunction detection apparatus according to the present invention.

Figure 7 is a state diagram showing the operating state during abnormal operation of the diaphragm valve in the diaphragm valve malfunction detection apparatus according to the present invention.

※ Explanation of code about main part of drawing ※

1: impingement plate 2: dust 3: filter cloth case

4: filter cloth 5: diaphragm valve 7: pulse gas reservoir

9: Atmospheric emission valve 10: Discharge device 11: Diaphragm valve malfunction detection device

5-1: Inlet side 5-2: Rubber plate 5-3: Storage force spring

5-5: solenoid coil 5-7: outlet 11-1: cap

11-3: Internal Ball 11-8: Exhaust Port 11-9: I / O Terminal Box

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The present invention relates to a malfunction detection device of a diaphragm valve that performs a pulse action during the cleaning operation of the filter cloth inside the dust collector. In particular, a malfunction detection device is provided in the pressure exhaust port of the diaphragm valve to detect a malfunction of the valve. It is to prevent the differential pressure increase inside the dust collector and to take prompt action in case of abnormality.

As shown in FIG. 1, in the pulverized coal production process, which is a coke alternative fuel for melting iron ore in the furnace, the impregnated air is introduced into the dust collector through a transport pipe by a pressurization, and after passing through the impingement plate 1, dust is filtered. Attached to the surface, the filtered clean air is discharged through the upper air dissipation valve 9 through the filter cloth case (3) inside the filter barrel (4).                         

The dust attached to the surface of the filter cloth 4 is continuously and automatically cleaned by a diaphram valve 5, which is a pulse jet cleaning mechanism, and the dust 2 is collected in the lower hopper and then the discharge device 10 is removed. Is discharged through.

The cleaning device is installed under the pulsed gas reservoir 7 installed outside the dust collector, and the high pressure air (4 to 5 Kg / cm ² ) is momentarily discharged from the blow pipe 8 by the sequential operation of the diaphragm valve 5. 0.2 second), and by the Venturi effect, the secondary air, which is 5 to 7 times the amount of injected air, is introduced into the suction filter cloth from the surroundings. Wash with.

In addition, since it does not change the pressure and air volume due to instant cleaning (0.2 seconds), it is possible to continuously operate in a stable state.

In addition, when the diaphragm valve 5 receives a pulse action signal from a PLC (Program Logic Controller) to the solenoid coil 5-5 of the valve body, the internal pressure is discharged to the exhaust port 5-4, and the rubber plate 5 -2) the momentary retreat and advancement are carried out, so that the pulsed gas flows into the blow pipe (8) to clean the filter cloth (4). Relieving force spring (5-3) is installed.

The inner pulse rubber plate 5-2 of the diaphragm valve 5 is made of rubber, and the contact of the ground and the operator due to the occurrence of rupture of the rubber plate during the prolonged use and the weathering of the electromagnetic coil 5-5 that receives an electric signal. Due to the drop out, the inner spring (5-3) of the valve (5) is broken by frequent shocks and loosening of the body connecting bolts (5-6).

As a result, the pressure holding gas of the rubber plate 5-2 is continuously discharged to the outside through the pressure exhaust port 5-4 of the diaphragm valve 5, and the pressure holding function of the diaphragm valve 5 is lost. A large amount of pulsed gas from the reservoir (7) flows into the dust collector, but the site worker is not fixedly placed there and needs to be contacted from other sites, so it takes a long time and quickly breaks down even after arriving at the site. It is not easy to find and take action.

Therefore, if a delay occurs, the differential pressure inside the dust collector increases, causing an emergency stop of the facility, thereby reducing the amount of pulverized coal injection and using an expensive coke, thereby increasing the use of blast furnace fuel raw materials, thereby increasing the plant cost.

In addition, the blast furnace operation due to rapid fluctuations in the amount of fuel consumption is unstable, causing a change in the charter quality, adversely affecting the operation of the post-process. In addition, when a large amount of pulse gas is introduced into the filter cloth 4 for a long time, the filter cloth 4 may be damaged, and dust may be released into the atmosphere, causing air pollution.

The present invention is to solve the above problems, by providing a malfunction detection device in the pressure exhaust port of the diaphragm valve to detect the malfunction of the valve to prevent the differential pressure rise inside the dust collector due to the malfunction of the valve, and promptly when abnormal Its purpose is to provide a diaphragm valve malfunction detection device that can be used for corrective action.

Malfunction detection device of the diaphragm valve according to the present invention for achieving the above object is mounted on the pressure outlet (5-4) of the diaphragm valve to move up and down by the instantaneous pressure ejected during the pulse ( 11-3); A body part 11-4 provided with a stopper 11-5 at an inner side thereof so that the inner ball 11-3 may be seated thereon; A cap 11-1 provided on an upper portion of the body portion 11-4 and including a limit switch for detecting an abnormal occurrence of pulse operation by a time when the inner ball 11-3 contacts; And a timer for receiving a pulse operation signal from a limit switch inside the cap 11-1 and outputting the output to the electronic gas blocking electronic valve 11-6 when an abnormal operation of the pulse occurs. And an input / output terminal box 11-9 for selectively closing 11-11.

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Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

According to the present invention, a diaphragm valve (5) detects a pulse operation signal by detecting a pulse operation signal due to a body part having a ball built up and moving up and down by a pressure discharged from the pressure outlet (5-4) and a ball in the body part. It is composed of an action section for detecting abnormality of the valve valve and transmitting it to the electromagnetic valve side.

3 is a view illustrating a state in which the present invention is mounted on the pressure exhaust port 5-4 of the diaphragm valve 5, and when viewed in detail through FIG. 4, the body portion 11-4 is cylindrical and has a ball stopper inside thereof. 11-5) is made of transparent plastic to be installed so that it can be monitored from the outside, and there are connecting threads on the top, bottom and side.

In addition, an inner ball 11-3 provided with a rubber material is inserted into the body part 11-4 to move up and down during the pulse action of the diaphragm valve 5.

In addition, the detection unit connects a hollow cylindrical fastening flange 11-2 to the upper part of the body part and puts a cap 11-1 having a limit switch therein to the upper part of the input / output terminal box in which an operation signal is built in when a pulse is applied. Wiring is carried out so that it is transmitted to (11-9).

On the side flange of the body portion 11-4, an electromagnetic valve 11-6, which is a device for shutting off the gas for discharge when the diaphragm valve 5 is detected, is installed. 11-9).

After that, the threaded nipple (11-7) is fastened and the elbow type pressure exhaust port (11-8) is connected to complete the action section.

Fig. 5 shows the assembled state of the present invention, in which only a portion of the ball 11-3, which is inserted therein, is caught in the stopper 11-5 in cross-sectional view.

Referring to the operation of the present invention having the configuration as described above are as follows.

The diaphragm valve (5 in FIG. 1) installed for the pulse action during the dust collector filter cloth cleaning operation is a signal transmitted to the solenoid coil 5-5, and the pressure inside the valve is discharged to the pressure outlet (5-4 in FIG. 2). The momentary withdrawal of the rubber plate 5-2 in the inner portion is discharged from the upper pulse gas reservoir (7 in Fig. 1) to the outlet side 5-7 through the inlet side 5-1 of the diaphragm valve and is filtered. Carry out a cleaning operation.

This device is installed in the pressure outlet (5-4) of the diaphragm valve (5) so that the instantaneous pressure discharged when cleaning the dust collector filter cloth raises the inner ball (11-3) of the body portion (11-4) When the limit switch is in contact with the limit switch of the built-in cap 11-1, the signal is transmitted to the input / output terminal box 11-9 having a built-in timer so that a red lamp flashes.

At this time, while the inner ball 11-3 is raised, the discharge pressure of the diaphragm valve is discharged to the exhaust port 11-8 via the normally open electromagnetic valve 11-6, and the inner ball 11-3 is lowered again. It shows the normal state in the state of being caught by the stopper (11-5) in the body portion (11-4) and re-pulsing after a certain time.
The operation state in which the operation as described above is performed shows the normal state during the pulse operation of the diaphragm valve 5 (see Fig. 6).

FIG. 7 illustrates a situation in which the diaphragm valve 5 is abnormally detected and acted upon with reference to the drawings.

Abnormal operation of the diaphragm valve 5 (breakage of the inner rubber plate 5-2, breakage of the spring 5-3, failure of contact with the solenoid coil 5-5) causes the internal pressure holding function to be lost and the pressure outlet 5 -4) in case of continuous leakage of the pulsed gas, the inner ball 11-3 of the apparatus mounted by the present invention is raised to keep the upper limit switch and the inner ball 11-3 in contact with each other, thereby discharging. The pressure is continuously discharged to the exhaust port 11-8.
Here, it can be seen that the state in which the discharge pressure is discharged to the exhaust port 11-8 is maintained as the state in which the inner ball 11-3 contacts the limit switch built in the cap 11-1 is maintained. have.

At this time, when the contact time between the internal ball (11-3) and the limit switch is long, the red lamp of the input / output terminal box (11-9) with a built-in timer is continuously lit for 10 seconds or more to block the exhaust gas from the terminal box (11-9). By outputting a closed signal to the electromagnetic valve 11-6 side, the electromagnetic valve 11-6 is closed to block the pulsed gas continuously flowing into the dust collector holding the internal pressure of the diaphragm valve 5.
As a result, the increase in the differential pressure inside the dust collector can be suppressed, and the dust collecting equipment can be stabilized, thereby making it possible to smoothly manufacture and supply pulverized coal.

FIG. 7 illustrates a state in which the inner bowl 11-3 contacts the upper limit switch for a predetermined time (10 seconds or more), thereby closing the exhaust gas blocking electronic valve 11-6.

The present invention as described above is installed in the pressure discharge port (5-4) of the diaphragm valve (5) that performs a pulse action during the cleaning operation of the filter cloth (4) inside the dust collector as a device for detecting the malfunction of the valve (5) By preventing the increase in the differential pressure inside the dust collector due to the operation, it is possible to make a supply of fine pulverized coal, thereby enabling a large amount of pulverized coal blowing operation. In addition, by extending the life of the filter cloth inside the dust collector, it prevents air pollution and contributes to cost reduction, and above all, it can be applied to the pulse jet type dust collector which has been adopted recently by automating the conventional manual work. have.

Claims (1)

An internal ball 11-3 mounted to the pressure discharge port 5-4 of the diaphragm valve and moving up and down by an instantaneous pressure ejected at the time of pulse; A body part 11-4 provided with a stopper 11-5 at an inner side thereof so that the inner ball 11-3 may be seated thereon; A cap 11-1 provided on an upper portion of the body portion 11-4 and including a limit switch for detecting an abnormal occurrence of pulse operation by a time when the inner ball 11-3 contacts; And A timer is provided to receive a pulse operation signal from a limit switch inside the cap 11-1, and to output an output to a discharge gas blocking electronic valve 11-6 when an abnormal pulse operation occurs. A malfunction detection device for a diaphragm valve including an input / output terminal box (11-9) for selectively closing 11-6).

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