JPH08233629A - Wet gas meter - Google Patents

Abstract

PURPOSE: To provide a wet gas meter which efficiently and accurately perform level adjustment in the case of one operator, especially efficiently and accurately perform the level adjustment after moving a meter such as meter exchange, and perform the level adjustment in higher accuracy for a long time. CONSTITUTION: A plumb bob level 40 is equipped in the outer wall face of a casing 20 in a wet gas meter which is rotatably supported in the sealed casing 20 with a cylindrical measuring drum soaked in sealing liquid till a prescribed reference level and is set in such a state that detection gas introduced into the casing 20 is flown into the drum from one end side one after another so as to be exhausted from the other end with rotation of the measuring drum.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wet gas meter which measures the flow rate of various gases by utilizing the rotation of a measuring drum immersed in a sealing liquid due to the inflow and outflow of gas.

[0002]

2. Description of the Related Art In this type of wet gas meter, a cylindrical measuring drum, which is divided into a plurality of measuring chambers arranged in the circumferential direction, is immersed in a sealed casing up to a predetermined reference liquid level in a sealed liquid. While being rotatably supported in the closed state,
The sealing liquid seals each measuring chamber on the liquid surface with respect to the other measuring chambers. Then, by utilizing that the sample gas introduced into the casing sequentially flows into and out of each of the measuring chambers with the rotation of the measuring drum, the integrated flow rate value of the gas is measured from the number of rotations of the drum. .

Since such a wet gas meter measures the gas flow rate by replacing the gas in the drum measuring chamber sealed by the sealing liquid with the sealing liquid, it is necessary to set the liquid level with high accuracy. In order to set the liquid level with high accuracy, it is essential to accurately adjust the level of the gas meter.

As shown in FIG. 5, a conventional wet gas meter has a bubble level (102) for level setting,
A water mark (103) is provided. In the current measurement method, a method using a water mark (103) is specified for a wet gas meter for a standard instrument that requires particularly high accuracy.

The water mark system is a water tank (104)
A glass tube (10) connected to the via a hose (105).
6) is prepared and the gas meter casing (101) is prepared.
Bring the glass tube (106) close to the horizontal linear water mark (103) provided at three places around the, and align the line of sight (E) with the water surface (S) in the glass tube (106). Level adjusting screw (10) on the lower surface of the gas meter so that the water mark (103) is aligned with the water surface (S).
This is a method of adjusting the gas meter level by operating 7).

In this water mark mark system, it is necessary to match all the water mark marks (103) at the three surroundings with the water level (predetermined water level) of the glass tube (106). For example, one water mark (103) When () is matched with a predetermined water level, the positions of other marks (103) change, and it is very difficult to align all three marks (103). For this reason, an error occurs for each level adjustment, and also an error occurs due to individual differences such as skill levels. Furthermore, this work is difficult for one person, and usually requires two workers, and improvement in work efficiency cannot be expected. In addition, since the work is performed from three directions around the gas meter, it is necessary to secure a work space in all three directions around the gas meter, and it is difficult to secure a work space.

From the above, in the conventional case, when the level is adjusted, the level mark system is not used from the beginning, but the level is adjusted using the bubble level (102) and then the level mark system is used. It was customary to adopt a method such as checking the horizontal degree according to.

[0008]

However, the bubble type level (102) is provided in the gas meter casing (101).
There is a problem that the sensitivity is apt to deteriorate due to the distortion of the air bubble and the aging of the bubble type spirit level itself, and high accuracy cannot be maintained. Further, in addition to the sensitivity deterioration of the bubble level (102), there is a problem that the level adjustment cannot be accurately performed because factors such as the error during the level adjustment and the error due to the individual difference are complicatedly entangled. In particular, when the meter installation position is changed, an error occurs during level adjustment after movement, which is a fatal defect for a wet gas meter that requires high accuracy.

Incidentally, for reference, in the prior art, an error caused when the level was adjusted after the meter was moved was very large, and the error reached 0.8 to 1.0%.

The present invention solves the above-mentioned problems of the prior art, and can perform level adjustment efficiently and accurately even when there is only one worker, and in particular, level adjustment after meter movement such as replacement of meter installation can be performed efficiently and accurately. Moreover, it is an object of the present invention to provide a wet gas meter that can perform level adjustment with high accuracy over a long period of time.

[0011]

In order to achieve the above object, the present invention provides a cylindrical casing in which a cylindrical measuring drum is freely rotatable while being immersed in a sealing liquid up to a predetermined reference liquid level. In a wet gas meter in which a sample gas supported and introduced into the casing sequentially flows into the drum from one end side and is discharged from the other end side as the measuring drum rotates, The main point is that the wall is equipped with a plumb bob.

[0012]

In the wet gas meter of the present invention, since the plumb bob is provided on the outer wall surface of the casing, the casing of the casing is arranged so that the weight of the plumb bob is adjusted to a predetermined position from the front of the meter or the like. You can adjust the level accurately just by adjusting the inclination of. Moreover, since this level setting work can be easily performed, there is almost no error in setting or error due to individual differences. Furthermore, since the main part of the plumb bob is firmly formed, is less likely to deteriorate over time, and has a simple structure, it can be easily repaired even if it is damaged or broken.

[0013]

1 to 3 are views showing a wet gas meter according to an embodiment of the present invention. As shown in these figures, this gas meter includes a casing (20) for accommodating the measuring drum (1) in a state of being immersed in a sealing liquid (L) up to a predetermined reference liquid level, a sample gas measurement and its display, etc. It has a counter box (30) accommodating a counter device (33) for performing.

The casing (20) is divided into upper and lower parts at a higher level than the reference liquid level of the sealing liquid (L), and a casing body (21) which constitutes a lower region thereof and a casing cover (which constitutes an upper region thereof). 22) and is formed by
The counter box (30) is a counter device (3
Counter box body (31) to which 3) is attached
And a counter cover (32) removably attached to the front opening of the casing body (21) and the counter box body (31),
It is formed by a cast-integral molded product made of an aluminum alloy or a stainless alloy, which is cast by the lost wax method so that both (21) and (31) are integrated with each other.

The lower end opening edge of the casing cover (22) is formed in a rectangular shape following the upper end opening edge of the casing body (21), and both opening edges of the casing body (21) and the cover (22). The parts are joined via a gasket, and are connected by screwing at peripheral points.

The measuring drum (1) has a cylindrical drum body (1a), a donut-shaped drum cover (1c) attached to one end of the drum body (1a), and the like. Inside 1a), a plurality of measuring chambers partitioned by blades are formed side by side in the circumferential direction.

A drum shaft (2) is fixed to the drum (1) along the axis, and one end side of the drum shaft (2) is bearing (2) on the inner surface of the rear wall of the casing body (21).
4) is rotatably supported, and the other end of the drum shaft (2) is attached to the bearing (2) at the partition wall portion between the casing body (21) and the counter box body (31).
It is rotatably supported via 3).

Inside the casing (20), the lower end of the main pipe (4a) of the gas conducting pipe (4) is fixed, and the branch pipe (4b) of the gas conducting pipe (4) is fixed to the drum cover (1c). Is inserted through the central hole of the drum and is opened at a position higher than the liquid level inside the one end side of the drum.

On the other hand, a gas inlet (22a) and a gas outlet (22b) are formed in the casing cover (22), and a gas outlet (22b) of the gas inlet (22b) is connected to the gas conduit (4). The upper end of the main pipe (4a) is connected.

As shown in FIGS. 1 and 2, a plumb bob level suspending portion (41) is integrally formed on the upper end of the outer surface of one side wall of the counter box body (31) so as to project laterally. In addition, an alignment mark giving portion (42) is formed in a laterally protruding shape at a position vertically below the suspension portion (41). Then, the upper end of the string (40b) of the plumb bob level (40) is connected to the suspension part (41), and the plumb bob level (4
The lower end of the weight (40a) of 0) is configured to match the mark given to the mark giving part (42). Further, the spirit level suspension section (41) and the mark giving section (42)
A groove-shaped transparent cover made of polycarbonate (43)
The upper and lower ends of the above are detachably attached, and the transparent cover (43) covers the surrounding open portion of the swing level (40).

The bubble level (17a) is attached to the center of the upper surface of the casing cover (22), and water level marks (not shown) are provided at three points on the peripheral side surface of the casing (20). Has been granted. Further, a level adjusting screw (50) for adjusting the inclination of the gas meter is provided at the lower end of the casing (20).

In this wet gas meter, in order to set the level, the weight (40) of the swing leveler (40) is used.
a) It is sufficient to adjust the inclination of the casing (20) by operating the level adjusting screw (50) so that the lower end coincides with the mark of the mark giving part (42), and thereby the level can be set with high accuracy. . In this case, a bubble level (17a) or a water mark mark system may be used together, if necessary. For example, for a wet gas meter for experiments that does not require very high accuracy, use a bubble level, and for a wet gas meter for a standard that is stipulated by the current measurement law, use a water mark method. This makes it easier to set the level suitable for the usage situation.

On the other hand, after the level adjustment, the casing (2
The liquid level of the sealing liquid (L) injected into 0) is adjusted.

In this state, the sample gas is measured. That is, the sample gas is fed into the casing (20) through the gas introduction port (22a). This gas is sequentially introduced into each measuring chamber in the drum as the drum (1) rotates, is discharged to the drum cover (1c) side, and is discharged to the outside through the gas conduit pipe (4). Then, the rotation status of the drum (1) during the gas feeding is transmitted to the counter device (33) via the drum shaft (2), and the integrated flow rate value of the gas is measured there, and the measured value is the front surface of the counter box. Will be displayed in.

According to this wet gas meter, only by operating the level adjusting screw (50) so as to align the weight position of the plumb bob leveler (40) mounted on the wall with a predetermined mark, a high precision is achieved. Since the level can be easily set, even a single worker can efficiently and accurately adjust the level. Moreover, since a highly accurate level can be set by a simple operation, an error at the time of setting and an error due to an individual difference are almost eliminated, and the level can be accurately adjusted even after the movement such as the replacement of the meter. In addition to the plumb bob level (40), the bubble level (17a) and the water mark mark method are used together to respect the measurement law and to easily set an appropriate level according to the usage situation. You can do it.

For reference, in the gas meter of the present embodiment, the error that occurs when the level is adjusted after the meter is moved,
It could be suppressed within the range of 0.1 to 0.2%.

Further, since a working space is usually secured in front of the gas meter, the above level adjustment can be carried out without any trouble from this space, and there is no problem from the viewpoint of working space, and the working space is actually used. Suitable for

Further, the plumb bob leveler (40) is not affected by the distortion of the casing (20), its main part is more solid and less prone to deterioration with time, and has a simple structure, as compared with the bubble type leveler. Therefore, even if it is damaged or broken, it can be easily repaired, and high accuracy can be maintained for a long time.

Further, in this embodiment, the plumb bob level (4
Since 0) is protected by the transparent cover (43), deterioration and damage can be effectively prevented, and the influence of wind or the like can be surely prevented at the time of level adjustment, and more accurate level adjustment can be performed.

Further, in the present embodiment, when vibration or the like occurs during gas measurement, the weight (40a) of the plumb bob leveler (40) shakes, so that the occurrence of vibration can be immediately sensed.
It is possible to stop the gas measurement during vibration and prevent the occurrence of measurement error.

In this embodiment, as the size of the gas meter becomes larger, the span of the plumb bob leveler (40) becomes longer, the accuracy is improved, and a better reliability can be secured. . By the way, in other devices such as a bubble level, as the size of the gas meter increases, the installation error increases and the reliability decreases.

On the other hand, the present embodiment also has the following effects.

First, the casing (20) is divided at a higher level than the reference liquid level so as to be formed by the casing body (21) and its cover (22), so that the sealing liquid (L) is 21) Since it does not reach the joint portion of (22), liquid leakage can be reliably prevented and the measurement accuracy at the time of gas measurement can be improved. Further cover (2
Since the sealing liquid (L) can be injected up to the reference liquid level in the casing body (21) without attaching 2), the rotation state of the measuring drum (1) and the counter device (3)
The operation status of 3) can be inspected. Therefore,
After the assembly is completed, a good product is almost certainly obtained, and the troublesome work of disassembling and repairing after the assembly is unnecessary.

Further, since the casing main body (21) and the counter box main body (31) are formed by a cast-integrally molded product, and the casing main body (21) and its cover (22) are connected by screws.
When assembling the gas meter, complicated work such as soldering and welding that requires a high degree of skill is not required, distortion due to heat such as soldering can be prevented, and the assembly work can be done easily, and cost reduction can also be achieved. Can be planned.

Further, since the casing body (21) and the counter box body (31) are formed by a cast integrally molded product made of aluminum alloy or stainless alloy cast by the lost wax method, the casing body (21) The strength of the
The displacement of the drum shaft (2) supported by it is prevented, the rotation irregularity of the drum (1) is eliminated, and the displacement of the counter box body (31) with respect to the casing body (21), that is, the drum shaft (2). Is prevented from being displaced, the rotation status of the drum (1) is accurately transmitted to the counter device (33) via the drum shaft (2), and the measurement accuracy can be further improved.

In addition, the lost wax method is thinner than the ordinary die casting method, and the undercut portion can be easily formed. Therefore, by using the casting method, a gas meter with a small size, light weight and good appearance can be obtained. Can be provided.

Further, in this gas meter, since the gas inlet (22a) and the gas outlet (22b) are formed in the casing cover (22), the external stress acting on the gas inlet and the gas outlet is the casing. Body (2
Since it does not act directly on 1), the adverse effect of external stress on the casing (20) is mitigated, and from this point also, the measurement accuracy can be improved.

FIG. 4 is a schematic perspective view showing a wet gas meter according to another embodiment of the present invention. The gas meter in this embodiment has a sheet metal casing (20), and a vertically long plumb bob level installing member (45) is attached to the front end of the side wall of the casing (20). The leveling device hanging portion (41) is provided at the upper end of the installation member (45) in a laterally protruding shape, and the mark giving portion (42) is provided at the lower end in a laterally projecting shape. A plumb bob (40) is hung on (41). In addition, the hanging part (41) of the spirit level installation member (45)
The upper and lower ends of a groove-shaped transparent cover (43) are removably attached to the mark giving portion (42).
In FIG. 4, (17b) is a water mark.

Since the other structure is substantially the same as that of the above-described embodiment, the same or corresponding parts are designated by the same reference numerals and the repeated description thereof will be omitted.

Also in this wet gas meter, the same effect as above can be obtained.

In the present invention, an existing wet gas meter may be retrofitted with a plumb bob. Also, the mounting position of the plumb bob is not particularly limited.

[0042]

As described above, according to the wet gas meter of the present invention, the plumb bob level is provided on the outer wall surface of the casing. Therefore, the weight position of the bob level is adjusted to a predetermined position. Moreover, since it is possible to easily set the level to high precision simply by adjusting the inclination of the casing, even a single worker can efficiently and accurately adjust the level. Moreover, since this level setting operation can be easily performed, there is almost no error at the time of setting or an error due to an individual difference, and the level can be adjusted accurately even after moving, for example, when the meter is replaced. Furthermore, since the plumb bob level does not easily deteriorate over time and has a simple structure, even if it is damaged or broken, it can be easily repaired and level adjustment can be performed with high accuracy for a long period of time. In addition, as the size of the gas meter becomes larger, the span of the plumb bob can be lengthened, the accuracy can be further improved, and further excellent reliability can be secured.

[Brief description of drawings]

FIG. 1 is a front view showing a wet gas meter according to an embodiment of the present invention.

FIG. 2 is a side view showing a wet gas meter according to an embodiment.

FIG. 3 is a side sectional view showing a wet gas meter according to an embodiment.

FIG. 4 is a perspective view schematically showing a wet gas meter according to another embodiment of the present invention.

FIG. 5 is a schematic perspective view for explaining a flood mark system.

[Explanation of symbols]

 1 ... Measuring drum 20 ... Casing 40 ... Swing level L ... Sealing liquid

Claims (1)

[Claims] 1. A cylindrical measuring drum is rotatably supported in a sealed liquid soaked in a sealing liquid up to a predetermined reference liquid level, and a sample gas introduced into the casing is measured. A wet gas meter in which the drum sequentially rotates into the drum from one end side and is discharged from the other end side, the outer wall surface of the casing is equipped with a plumb level. Wet gas meter.