JPH0619275B2 - Piston tilt measuring device for dry gas holder - Google Patents

Description

TECHNICAL FIELD The present invention relates to a piston inclination measuring device for a dry gas holder, and more particularly to a gas holder having a piston that moves up and down along a side plate in the gas holder according to the amount of gas. The present invention relates to a piston tilt measuring device for a dry gas holder capable of detecting and displaying a tilt value and a tilt direction when the piston tilts due to an increase or decrease in gas amount.

[Prior Art] Blast furnace gas (BFG) and coke oven gas (COG) are generated in the iron making process in an iron mill or the like. These gases are stored in the dry gas holder for effective use later.

Generally, a dry holder has a closed structure including a bottomed cylindrical holder and a piston that is movable up and down along an inner wall of a side plate in the holder. The piston is configured to move up and down in the holder as the amount of gas contained in the holder increases and decreases.

In addition, a gas seal is provided between the piston and the gas holder,
The oil seal device provided on the piston supplies the seal oil between the gas holder and the piston for gas sealing.

[Problems to be Solved by the Invention] By the way, the piston that moves up and down according to the increase and decrease of the gas amount as described above is caused by the difference in the frictional resistance in the circumferential direction between the inner wall of the holder side plate and the piston during the up and down movement. Incline.
When the piston moves in a tilted manner, the seal oil moves, resulting in insufficient oil supply, and a sufficient sealing function cannot be achieved. As a result, the gas contained in the holder may leak to the outside. At the same time, the tilted piston locally hits the inner wall of the side plate of the holder with a strong force to press it. Therefore, a large stress is applied to the side plate, which may cause a crack.

Therefore, in order to prevent such gas leakage and side plate cracks, it is effective to correct the posture of the inclined piston to a horizontal position. In order to correct the posture of the inclined piston, it is necessary to accurately detect the inclination value of the piston and its inclination direction.

Therefore, in the past, a measuring device was installed in the piston truss section, and during measurement, the inclination of the piston was measured by entering the holder.

In this case, since it is necessary to enter the holder each time the tilt is measured, there is a problem that the measurement work becomes complicated and the measurement data cannot be obtained when necessary. In addition, a true measured value cannot be obtained unless the inclination of the piston is measured instantaneously. For this reason, conventionally, it is necessary to perform measurement at each measurement point at the same time, which makes accurate measurement difficult, and there is a problem in that the reliability of the measurement value is lacking.

Therefore, the present invention was devised to effectively solve the above problems, and when the piston that moves up and down in the holder according to the increase or decrease of the gas amount is inclined from its horizontal position, its inclination value and An object of the present invention is to provide a piston inclination measuring device for a dry gas holder capable of accurately and automatically detecting and displaying the inclination direction.

[Means for Solving Problems] The present invention relates to a dry gas holder having a piston that moves up and down according to an increase or decrease in the amount of gas in a gas holder, and a liquid tank provided along the circumferential direction of the piston, A sensor that detects that the liquid level of the liquid tank has changed as the piston tilts from its horizontal position, a piston stationary detection means that detects the stationary state of the piston, and a tilt value of the piston from the sensor at fixed time intervals. And a tilt value of the piston from the piston tilt detecting means for detecting the tilt direction of the piston in a stationary state at regular intervals when the tilt value exceeds a certain value from the horizontal position of the piston. And a piston inclination display means for displaying the inclination direction.

[Operation] The fact that the piston that moves up and down due to fluctuations in the amount of gas is tilted is detected by fluctuations in the liquid level in the liquid tank, and the tilt value is detected at regular intervals, and the tilt value exceeds the fixed value in the tilt direction. It is detected at regular intervals when the piston is stationary.

[Embodiment] An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in FIG. 1, a disc-shaped piston 2 is provided in a cylindrical or polygonal gas holder 1 for storing blast furnace gas or the like. The piston 2 moves up and down along the side plate 3 of the gas holder 1 as the amount of gas in the gas holder 1 increases or decreases.

Between the piston 2 and the side plate 3 of the gas holder 1,
An oil seal device for gas sealing is provided as shown in FIG.

This oil seal device is formed by a liquid tank 4 formed continuously along the circumferential direction of the piston. The liquid tank 4 is formed in a cup shape in cross section, and as the piston 2 moves up and down, seal oil is stored and supplied between the peripheral portion of the piston 2 and the inner wall of the side plate 3 to exert a gas sealing function. .

In particular, a sensor for detecting a change in the liquid level due to the inclination of the piston 2 is provided in the liquid tank 4.

This sensor is, for example, a display type level gauge 5 as an example.
It is composed by.

This displacer type liquid level gauge 5 is, as shown in FIG.
The float 6 is elastically supported from a fixed system and hangs down, and a transmitter 7. Float 6 is seal oil 8
And floats, and moves up and down according to the fluctuation of the liquid level of the seal oil 8. Further, the transmitter 7 is configured to replace the fact that the float 6 has moved up and down due to the fluctuation of the level of the seal oil 8 with an electric signal. In this embodiment, three liquid level gauges 5 are provided in the liquid tank 8 at equal intervals along the circumferential direction of the piston 2. That is, the inclination of the piston 2 is 3
It is configured to detect at points.

These liquid level gauges 5 convert the inclination of the piston 2 into an electric signal and output it to the piston inclination detecting means 9.

The piston inclination detecting means 9 detects the inclination value of the piston 2 and its inclination direction.

The tilt direction of the piston 2 is detected when the tilt value exceeds a certain value from the horizontal position of the piston 2.

Specifically, as shown in FIG. 3, the piston inclination detecting means 9 is mainly composed of a line for calculating an inclination value and a line for calculating an inclination direction.

In the line for obtaining the slope value, a filter 10 for removing noise transmitted from each liquid level gauge 5, an average value calculation circuit 11 for obtaining an average value of the measurement values obtained from each liquid level gauge 5, The deviation value calculation circuit 12 for calculating the deviation value by comparing the average value and the measurement value of each liquid level gauge 5, and the inclination value calculation circuit 13 for deriving the inclination value of the piston 2 from the deviation value.
And a gradient value condition setting circuit 14 for outputting the obtained gradient value at regular time intervals, and a gradient value output circuit 15 for outputting the gradient value. That is, each level gauge 5
The average value of the measured values output from is calculated, and the deviation value of each measured value is derived from this average value. The inclination value of the piston 2 is obtained from this deviation value. The slope value is reset at regular intervals, and a new slope value is output each time the reset value is reset.

Further, in obtaining the inclination direction of the piston 2, the inclination direction calculation circuit 16 connected to the deviation value calculation circuit 12 in the inclination value line and the inclination direction calculation circuit 16 are connected in parallel, and the piston 2 is mainly It is mainly composed of a tilt direction condition setting circuit 17 that outputs a tilt direction when tilting beyond a certain value (10 mm) from the horizontal position, and a tilt direction output circuit 18 that outputs a tilt direction. The inclination direction condition setting circuit 17 is connected to a piston speedometer transmitter 19 and a pulse generator 20, which are piston stationary state detecting means for detecting the stationary state of the piston 2. Piston speedometer transmitter 1
Reference numeral 9 outputs to the inclination direction condition setting circuit 17 that the piston 2 is stationary. Further, the pulse generator 20 emits a pulse at regular intervals (30 seconds).

Therefore, the inclination direction of the piston 2 obtained from the inclination direction calculation circuit 16 is detected at regular intervals when the inclination value exceeds a constant value, and is output when the piston 2 is in a stationary state.

Specifically, as shown in FIGS. 4 and 5, the measured value in the 0 ° direction by the liquid level gauge 5 is L1, and the measured value in the 120 ° direction is L1.
When the measured value in the direction of 2,240 ° is L3, the liquid level L when the piston 2 is horizontal is expressed by the following equation.

Liquid level L at horizontal position of piston 2, measured values L1, L2, L
If the deviation values of 3 are l1, l2, l3, then l1, l2,
l3 is expressed as follows.

l1 = L1-L (2) l2 = L2-L (3) l3 = L3-L (4) Assuming that the central axis X of the inclination of the piston 2 is as shown in FIG. Let θ be the angle formed by L1 and R be the radius of the piston 2 be the angle formed by the central axis X and the horizontal plane Y as shown in FIG. When the difference between the upper and lower sides of the central axis X of inclination is l, l is expressed by the following equation.

l = 2Rsin (9) By substituting this equation (9) into the equation (8) and rearranging, the following equation is obtained.

Also, by substituting equation (9) into equation (5) and rearranging, the following equation is obtained.

211 = lcos θ (11) When the equations (10) and (11) are squared and added, Multiplying both sides of this equation (12) by 3/4, The vertical difference l of the tilt center axis X becomes the tilt value of the piston 2.

On the other hand, the inclination direction of the piston 2 is calculated from the equation (5). Substituting equation (9) into equation (14), That is, as shown in FIG. 5, the inclination angle of the piston 2 is represented by the angle θ from the measured value L1 to the point where the piston 2 is most inclined.

The inclination amount 1 and the inclination direction θ of the piston 2 thus obtained are output to the piston inclination display means 21.

On the piston inclination display means 21, the inclination value and the inclination direction are displayed separately. In this embodiment, it is composed of an analog type inclination value indicator 21 and an inclination direction indicator 22.

Next, the operation of the present invention will be described.

As shown in FIG. 1 and FIG. 2, when the piston 2 that moves up and down along the inner wall of the side plate 3 of the gas holder 1 inclines according to the increase or decrease in the gas amount, the liquid tank provided along the circumferential direction of the piston 2 The liquid level of 4 fluctuates. The fluctuation of the liquid level is detected by the liquid level gauge 5 as a sensor.

Each liquid level gauge 5 detects that the piston 2 is tilted from its horizontal position by increasing or decreasing the seal oil 8 in the liquid tank 4, and outputs this to the piston tilt detecting means 9.

In the piston inclination detecting means 9, as shown in FIG. 3, first, a signal is output from each liquid level gauge 5 to the filter 10. When the signal output from each liquid level gauge 5 passes through the filter 10, a temporary delay element is added to remove noise.

The noise-removed signals that pass through the filter 10 are output to the average value calculation circuit 11, respectively. In this average value calculation circuit 11, measured values L1, L2 obtained by each liquid level gauge 5
The average value L of L3 is obtained. This average value L is compared with each measured value L1, L2, L3 in the deviation value calculation circuit 12, and the deviation value calculation circuit 12 shows the deviation values l1, l at each measurement point.
Calculate 2,13. These deviation values l1, l2, l3
From this, the inclination value calculation circuit 13 obtains the inclination value 1 of the piston 2.

The obtained inclination value l is continuously detected as the measurement time elapses. In order to simplify this, the slope value condition setting circuit 14 outputs the slope value 1 from the slope value output circuit 15 at regular intervals.

In this embodiment, the inclination value 1 is reset every 30 seconds, and at the same time, a new inclination value 1 is detected. That is, it is updated to a new slope value l at regular intervals.

Further, the inclination value 1 thus obtained is input to the inclination direction condition setting circuit 17 connected in parallel to the inclination direction calculation circuit 16 for calculating the inclination direction θ.

In the inclination direction condition setting circuit 17, the inclination value 1 exceeds a certain value and the piston speed transmitter 19 causes the piston 2 to move.
Is detected, and is output on condition that a certain time has elapsed. That is, the piston 2 is tilted by 10 mm or more and is stationary, and outputs a signal when 30 seconds have passed since the last update. When these conditions are satisfied, the tilt direction θ is output to the tilt direction output circuit 18.

The tilt value indicator 22 of the piston tilt display means 21 displays the tilt value thus detected by the piston tilt detection means 9. Similarly, the tilt direction indicator 23 of the piston tilt display means 21 displays the tilt direction of the piston 2.

In the inclination value indicator 21, the piston inclination detecting means 9 is provided with the filter 10, so that stable operation of the pointer is ensured.

The tilt direction indicator 22 allows the tilt direction during fine movement of the piston 2, and the piston 2 when tilted greatly
Only the tilt direction of will be displayed. Moreover, since the tilt direction is detected when the piston 2 is stationary, the pointer of the tilt direction indicator 22 shows a stable operation.

As described above, according to the present invention, the inclination of the piston 2 that moves up and down according to the increase or decrease of the gas amount is detected by the fluctuation of the liquid level of the liquid tank 4, and the inclination value and the inclination direction of the piston 2 are determined from the fluctuation of the liquid level. Since it is detected at fixed time intervals, it is possible to grasp the change over time of the posture of the piston and to detect the tilt direction of the piston 2 in the stationary state, so that accurate and stable tilt data can be obtained. Therefore, maintenance and inspection and operation management of the piston and the gas holder can be easily performed.

In the above embodiment, the analog pointers 22 and 23 are adopted as the piston tilt display means 21, but the invention is not limited to this. The piston tilt display means 21 may be configured to display digitally.

In addition to the displacer type liquid level gauge 5, the sensor may be constituted by a differential pressure type liquid level gauge or the like.

[Effects of the Invention] In summary, according to the present invention, the following excellent effects are exhibited.

The tilt of the piston that moves up and down according to the increase or decrease of the gas amount is detected by the fluctuation of the liquid level in the liquid tank, and the tilt value and the tilt direction of the piston are detected from this fluctuation of the liquid level at regular intervals. Since it is possible to grasp the change over time of the posture of the piston and to detect the tilt direction of the piston in the stationary state, accurate and stable tilt data can be obtained, and maintenance and operation management of the piston and gas holder are facilitated. obtain.

[Brief description of drawings]

FIG. 1 is a perspective view showing a piston tilt measuring device according to the present invention, FIG. 2 is a schematic sectional view showing a main part of FIG. 1, FIG. 3 is a block diagram of the piston tilt measuring device, and FIG. 4 is a piston. FIG. 5 is a diagram showing the inclination degree of FIG. In the figure, 1 is a gas holder, 2 is a piston, 4 is a liquid tank, 5
Is a liquid level gauge as a sensor, 9 is a piston inclination detecting means,
Reference numeral 21 is a piston inclination display means.

Continuation of the front page (56) References JP-A-51-108862 (JP, A) JP-A-62-204114 (JP, A) Actually developed JP-A-59-176911 (JP, U)

Claims (1)

[Claims] 1. A dry gas holder having a piston that moves up and down according to an increase or decrease in the amount of gas in a holder, wherein a liquid tank provided along the circumferential direction of the piston and the piston is inclined from its horizontal position. A sensor for detecting that the liquid level of the liquid tank has changed in accordance with the above, a piston stationary detection means for detecting a stationary state of the piston, and the inclination value of the inclination value of the piston detected from the sensor at constant time intervals. Piston inclination detecting means for detecting the inclination direction of the piston in a stationary state at regular time intervals when the piston exceeds a certain value from the horizontal position, and a piston for displaying the inclination value and the inclination direction of the piston from the piston inclination detecting means. A piston inclination measuring device for a dry gas holder, comprising an inclination display means.