KR20160123636A

KR20160123636A - Apparatus for measuring content of coal gas with multi collecting for measured gas

Info

Publication number: KR20160123636A
Application number: KR1020150053918A
Authority: KR
Inventors: 이원석; 권순일; 이승록
Original assignee: 한국지질자원연구원
Priority date: 2015-04-16
Filing date: 2015-04-16
Publication date: 2016-10-26

Abstract

The present invention relates to a coal gas measuring device including a branch collection function for measurement gas, capable of recycling measurement gas or conducting other tests by measuring coal gas, contained in a coal core, while diverging the measured gas to a canister or extra device without discharge into the air. The present invention includes: a canister collecting coal gas, emitted from a coal core, and discharging the collected coal gas; a divergent discharger installed in a manometer to be openable to supply the coal gas from the canister to the manometer or discharge the coal gas, completely measured by the manometer, from the manometer while being diverged from the canister; and a collector connected with the divergent discharger to be communicable to collect the coal gas emitted from the divergent discharger.

Description

TECHNICAL FIELD [0001] The present invention relates to a coal gas measuring device having a branch collecting function of a measuring gas,

More particularly, the present invention relates to a coal gas measurement apparatus, and more particularly, to a coal gas measurement apparatus, which measures coal gas contained in a coal core and divides the measured gas into a canister or a separate apparatus without discharging the gas into the air, The present invention relates to a coal gas measuring apparatus having a branch collecting function of a measuring gas capable of performing a gas collecting function.

In the process of coal mining, the gas released into the atmosphere is a combustible gas, and about 95% of the coal gas is composed of methane.

Thus, the methane gas released into the atmosphere during coal mining is a giant greenhouse gas equivalent to about 21 times that of carbon dioxide, which is a major problem in global warming and the environment.

Therefore, the technology for capturing and developing methane gas present in the coal bed and utilizing it as a resource not only minimizes the problems in the global warming and the environment field, but also solves the problem of resource depletion which is a global issue , Its importance continues to grow.

Coal bed methane (CBM) is generated in the course of the transformation of plants into coal during the geological period and is present in the coal bed with adsorbed on coal molecules or liberated in pores.

A brief look at the development and use of coal-bed methane gas can be divided into two methods: direct extraction of methane gas from the unexplored coal bed, and collection of gas from the coal during coal mining.

In particular, in the case of a coal layer located at a depth where coal is difficult to be extracted, it is necessary to use a method of directly extracting methane gas from the coal bed. In this case, coal can not be produced by coal mining, It is important to accurately measure the amount of methane gas in the coal bed before development.

The methane gas content of coal seams can be divided into indirect and direct methods.

For example, an indirect method may be to use data on the absorption / desorption isotherm measurement data in the laboratory, or related statistical data, the gas content analogy from the degree of carbonization, density log measurements and the relationship between density and gas content of coal , And indirectly measuring the amount of coal gas methane gas.

The direct method is to measure the amount of gas desorbed from the coal sample and the rate at which the gas is desorbed by sampling the in-situ coal core sample by performing drilling in the field and comparing the reliability with the indirect method high.

The methane gas content of the coal bed by the direct method is determined by the amount of lost gas generated during the drilling and transporting of the coal core sample, the amount of desorbed gas generated in the desorption process, and the amount of residual gas remaining in the coal core after desorption Residual gas, and the total gas content is the sum of these three measurements.

In this case, the amount of desorbed gas and the amount of residual gas can be measured in such a manner that the amount of gas existing in the coal core is confirmed.

A technique for measuring the amount of gas is disclosed in Japanese Patent Application Laid-Open No. 10-1999-0052233, which discloses a technique for measuring the amount of gas generated in a pyrolysis furnace in a coke oven gas amount measuring apparatus.

However, the above-described conventional techniques have a problem in that it is impossible to perform the other tests such as the analysis of the components or the recycling of the measurement gas as the measured gas is discharged into the air and is annihilated.

Korean Patent Publication No. 10-1999-0052233

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the prior art as described above, and it is an object of the present invention to provide a method and apparatus for accurately measuring the amount of coal gas desorbed from a coal core through an agitator, Which is capable of carrying out another test such as component analysis by selectively supplying coal to a manometer and discharging the coal gas discharged from a manometer to an air collector without discharging it to the air, Quot; is provided.

According to another aspect of the present invention, there is provided a coal gas measurement apparatus having a branch collecting function of a measurement gas, comprising: a canister for collecting coal gas discharged from a coal core and discharging collected coal gas; An agitator connected to the canister for supplying a coal gas, measuring a gas amount of the coal gas through an amount of water supplied by the coal gas in a state where water is filled, and discharged by the coal gas; A branch discharger which is openably and closably provided in the manometer and supplies the coal gas discharged from the canister to the agitator or the coal gas which has been measured in the agitator is branched from the canister in the agitator; And a collector for collecting coal gas which is communicably connected to the branch discharger and collects coal gas discharged from the branch discharger, wherein the branch discharger includes a gas communication pipe communicably connected to the agonometer for communicating coal gas; A first branch pipe having one end connected to the gas communication pipe and the other end connected to the canister; A second branch pipe having one end connected to the gas communication pipe and the other end connected to the collecting device while being branched from the first branch pipe; And a gas communication pipe provided at a connection portion between the gas communication pipe and the first branch pipe and the second branch pipe to selectively open and close the gas communication pipe with the first branch pipe or the second branch pipe, And a branching valve for allowing the branching valve to be opened.

For example, the collector includes a collecting tank connected to a second branch of the branch discharger and storing coal gas discharged to the second branch, a second tank connected to the second branch, And a syringe for sucking the coal gas discharged to a predetermined capacity.

For example, the manometer may include a frame forming an outer shape; At least one cylinder tube mounted inside the frame and being disposed in a direction perpendicular to the paper surface, the water being charged into the cylinder; A gas inflow valve connected to the branch discharge device so as to be openable and closable so as to introduce coal gas discharged from the canister into the branch discharge device; A water discharge valve which is installed at the lower end of the cylinder tube so as to be openable and closable and discharges the water to the outside by the pressure of the coal gas flowing into the cylinder tube; A first water discharge pipe connected to the water discharge valve at one end thereof; And a water tank mounted on one side of the frame and connected to the other end of the first water discharge pipe so that water discharged by opening each of the water discharge valves is introduced into the water storage tank, And is slidable along one side surface in a direction perpendicular to the paper surface.

For example, the water tank may include an inflow hole formed in a lower surface thereof and coupled to the other end of the first water discharge pipe; A discharge hole formed on an upper side of the side surface and coupled with the second water discharge pipe so that water flowing through the inlet hole is discharged to the outside when the water reaches a certain height in the water tank; A guide member mounted on an outer surface of the water tub; A guide rail formed on one side of the frame and coupled with the guide member to guide vertical movement of the slide of the water tub; And a fixing member mounted on the guide member and fixing the guide member to the guide rail, wherein the water tank is maintained in a state where the water is charged up to the height of the discharge hole.

Further, it is preferable that the water tub is vertically moved with respect to the height of water with respect to the cylindrical tube from which the water is discharged.

The manifold may further include a refill valve disposed on a side surface of the cylinder tube to supply water into the cylinder tube.

A coal gas measurement device having a branching collecting function of a measuring gas is provided at a lower center of the frame to indicate a horizontal level of the frame.

In addition, the manometer may further include an auxiliary water supply unit disposed above the water tank and supplying water to the inside of the water tank so as to maintain water filled up to the height of the discharge hole.

According to the coal gas measuring device having the branch collecting function of the measuring gas according to the present invention, the branch discharging device installed in the agitator selectively performs the supply or discharge of the coal gas, And since the coal gas discharged from the branch ejector is collected by the trapper, the measurement gas can be recycled or used for another test.

Also, when the collector is composed of a collecting tank for storing coal gas, a large amount of collected coal gas can be transported to a collecting tank for reuse. When the collecting unit is composed of a syringe for sucking coal gas, Gas can be easily collected and used.

It is also possible to estimate the amount of coal gas buried in the underground coal bed by accurately measuring the amount of coal gas contained in the coal sample through the construction of the manometer.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration diagram showing a coal gas measurement apparatus according to the present invention. FIG.
Fig. 2 is a perspective view showing the branch ejector shown in Fig. 1. Fig.
3 is a perspective view showing an embodiment of the agitator shown in Fig.
Fig. 4 is a side view showing the agitator shown in Fig. 3; Fig.
Fig. 5 is a plan view showing the agitator shown in Fig. 3; Fig.
Fig. 6 is a bottom view showing the agitator shown in Fig. 3; Fig.
7 is a perspective view showing the water tank shown in Fig. 3; Fig.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted.

Embodiments in accordance with the concepts of the present invention can make various changes and have various forms, so that specific embodiments are illustrated in the drawings and described in detail in this specification or application. It is to be understood, however, that it is not intended to limit the embodiments according to the concepts of the present invention to the particular forms of disclosure, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between. Other expressions that describe the relationship between components, such as "between" and "between" or "neighboring to" and "directly adjacent to" should be interpreted as well.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises ", or" having ", or the like, specify that there is a stated feature, number, step, operation, , Steps, operations, components, parts, or combinations thereof, as a matter of principle.

The coal gas measuring apparatus having the branch collecting function of the measuring gas according to the present invention includes a canister 50, a manometer 100, a branch discharger 200, and a collector 300 as shown in FIG. 1 .

The canister 50 stores the coal gas discharged from the coal sample, and discharges the stored coal gas to the manometer 100.

The agitator 100 is a component for measuring the gas amount of the coal gas discharged from the canister 50.

Such a manometer 100 satisfies any configuration as long as it can measure the amount of gas by introducing the coal gas supplied from the canister 50.

For example, the manometer 100 may be configured in such a manner that the amount of gas is measured through the amount of water discharged by the coal gas as the coal gas of the canister 50 is supplied in a water filled state.

Here, a concrete embodiment of the manometer 100 to which the method of measuring the amount of gas through the amount of water is applied will be described later.

The branch discharger 200 selectively supplies the coal gas discharged from the canister 50 to the agitator 100 or the coal gas that has been measured in the agitator 100 is branched from the canister 50, (100).

The branch discharger 200 may be installed on the upper surface of the cylinder tube 110 constituting the manometer 100 as shown in FIGS. 1 and 2. The branch discharger 200 may include a cylinder tube 110, As shown in FIG.

For example, the branch ejector 200 may comprise a gas communication tube 210, a first branch 220, a second branch 230, and a branch valve 240, as shown in FIG. 2 .

The gas communication pipe 210 is communicably connected to the upper portion of the cylinder tube 110 constituting the manometer 100 to form a communication path for the coal gas.

The first branch pipe 220 is connected to the gas communication pipe 210 at one end, and the other end of the coal gas discharged from the canister 50 flows into the manometer 100.

The second branch pipe 230 extends from the first branch pipe 220 in a branched state to supply the coal gas discharged from the agitator 100 to the trapper 300 described later.

That is, the gas communication pipe 210, the first branch pipe 220, and the second branch pipe 230 form a T shape and flow coal gas into the cylinder pipe 110 of the manometer 100 The coal gas discharged from the cylinder tube 110 is branched.

The branch valve 240 is configured to establish a communication path of the coal gas by selectively opening the gas communication pipe 210 through operation by the user and selectively communicating with the first branch pipe 220 or the second branch pipe 230 Element.

2, the branch valve 240 is rotatably incorporated in the connection portion between the gas communication pipe 210 and the first branch pipe 220 and the second branch pipe 230, Shaped flow path 240a is formed in the interior of the gas communication pipe 210, so that the communication path of the gas can be established while opening and closing the gas communication pipe 210 through rotation by the user.

Here, the branch valve 240 is provided with a lever and can be manually rotated by a user, and a motor may be provided to rotate automatically.

The collector 300 is communicably connected to the second branch 230 of the branch collector 200 as shown in FIG. 1 to collect the coal gas discharged from the manometer 100.

The collecting device 300 may include at least one of the collecting tank 310 and the syringe 320 as shown in FIG. 1, for example, and may be connected to the second branch pipe 230.

The collecting tank 310 can store the coal gas discharged into the second branch pipe 230 in a large capacity, and can store the stored coal gas whenever necessary, and can supply the stored coal gas to a separate device such as a component analyzer have.

The syringe 320 can immediately use a set amount of coal gas by sucking the coal gas discharged from the second branch pipe 230 of the branch discharger 200 at a predetermined capacity.

3 is a perspective view, Fig. 4 is a side view, Fig. 5 is a plan view, Fig. 6 is a bottom view, and Fig. 6 is a side view of the manifold 100. Fig. 7 is a perspective view showing the water tank 160 constituting the agitator 100. As shown in FIG.

Referring to the drawings, the above-described agitator 100 is disposed in at least one cylinder tube, for example, in a direction perpendicular to the paper, inside a frame 10 forming an outer shape, The first cylinder tube 110, the second cylinder tube 120, and the third cylinder tube 130 may be mounted.

The first cylinder tube 110, the second cylinder tube 120, and the third cylinder tube 130 may be made of various materials such as transparent materials, such as acrylic or tempered glass, The diameter of the second cylinder tube 120 may be smaller than the diameter of the first cylinder tube 110 and the diameter of the third cylinder tube 130 may be smaller than the diameter of the second cylinder tube 120 .

The branch discharger 200 may be provided at the upper ends of the first cylinder tube 110, the second cylinder tube 120 and the third cylinder tube 130, A first gas inlet valve 141, a second gas inlet valve 142, and a third gas inlet valve 142 connected to the canister 50 for introducing coal gas into the first branch pipe 210 of each branch discharge device 200, And the inflow valve 143 can be mounted to be openable and closable, respectively.

Here, the connecting pipe connecting the gas inlet valves 141, 142, and 143 and the branch discharger 200 is omitted from FIGS. 3 to 6, and the branch discharger 200 is not shown in FIG. 4 .

On the other hand, each of the gas inlet valves 141, 142 and 143 is composed of a one-touch type valve. This not only provides convenience to the experimenter during the experiment but also minimizes the experimental error by shortening the time when connecting the cylinder tube to the cylinder tube when the gas is saturated in the cylinder tube during gas quantity measurement.

Each of the gas inlet valves 141, 142 and 143 may be omitted in the manometer 100 of the embodiment and the first cylinder pipe 110, the second cylinder pipe 120, and the third cylinder pipe 130 May be connected to the canister 50, respectively.

The first water discharge valve 112, the second water discharge valve 122 and the third water discharge valve 122 are connected to the lower ends of the first cylinder pipe 110, the second cylinder pipe 120 and the third cylinder pipe 130, And the valve 132 can be mounted to be openable and closable, respectively.

Therefore, the water charged by the pressure of the coal gas flowing into each of the cylinder tubes 110, 120, and 130 flows through the first water discharge valve 112, the second water discharge valve 122, Can be discharged to the outside of the cylinder tube through the opened valve of the valve 132.

As shown in the figure, the first water discharge valve 112 and the second water discharge valve 122 are connected to the first T-type valve 151 through connection pipes 152 and 153, The connection pipe 156 connected to the first T-type valve 132 and the connection pipe 154 connected to the first T-type valve 151 may be connected to the second T-

The second T-type valve 155 may be connected to one end of the first water discharge pipe 150.

Therefore, the water charged into the first cylinder tube 110, the second cylinder tube 120, and the third cylinder tube 130 can be discharged to the first water discharge pipe 150.

Scale bars 113, 123 and 133 may be respectively displayed on the outer surfaces of the cylinder tubes 110, 120 and 130 in the longitudinal direction. Therefore, the amount of coal gas flowing into the amount of water discharged from each of the cylinder tubes 110, 120, and 130 can be measured.

The other end of the first water discharge pipe 150 may be connected to the inlet hole 161 formed in the lower surface of the water tank 160 mounted on one side of the frame 10. As shown in FIG. 7, the water tank 160 is made of acrylic or tempered glass having a transparent material. On the upper side of the water tank 160, water discharged through the first water discharge pipe 150 and flowing into the inlet hole 161 The discharge hole 162 may be formed so as to be discharged at a predetermined height in the water tank 160.

The second water discharge pipe 170 is coupled to the discharge hole 162 so that the water in the water tank 160 can be discharged to the outside through the discharge hole 162. Therefore, the water tank 160 can maintain the water filled up to the height of the discharge hole 162.

A guide member 163 is mounted on the outer surface of the water tank 160. The guide member 163 is coupled to a guide rail 11 formed on one side of the frame 10, Movement can be guided. A fixing member 164 is mounted on the guide member 163 so that the position of the guide member 163 can be fixed on the guide rail 11. [

As described above, by sliding the water tank 160 vertically according to the height of the water that is mounted on the outer surface of the frame 10 and discharged from the cylinder pipes 110, 120 and 130, the water pressure of the water contained in the water tank 160 It is possible to prevent the inflow of the coal gas into the respective cylinder pipes 110, 120 and 130.

An auxiliary water supply unit for supplying water to the inside of the water tank 160 can be mounted on the frame 10 so as to maintain the water filled up to the height of the discharge hole on the upper side of the water tank 160.

120 and 130 to measure the amount of coal gas introduced into the cylinder tubes 110, 120, and 130 when the water charged into the cylinder tubes 110, 120, and 130 is discharged through the inlet of the coal gas, And refill valves 114, 124, and 134, respectively, capable of allowing water to flow therein.

A height adjustment member 30 for adjusting the height is mounted on the lower end of the frame 10 forming the outer shape of the coal gas measuring apparatus 1 of the present invention. A horizontal scale 20 indicating the horizontal can be mounted.

A method of measuring the amount of gas emitted from a coal sample using the coal gas measuring apparatus having the branch collecting function of the measuring gas according to the present invention can be described as follows.

The gas discharged from the coal sample is collected in the canister 50 and the gas communication pipe 210 of the branch discharger 200 is closed so that the gas is discharged from each of the cylinder pipes 110, The first gas inlet valve 141 and the first water outlet valve 112 are opened while the water is charged and the height of the water tank 160 is fixed to the height of the water charged in the cylinder tube, When the first branch pipe 220 of the branch discharger 200 installed in the first cylinder pipe 110 communicates with the first branch pipe 141 through the first gas inlet valve 141, And the water charged by the incoming coal gas flows into the water tank 160 through the first water discharge valve 112 and is discharged to the outside.

At this time, the height of the water tank 160 is adjusted according to the height of the water discharged from the first cylinder tube 110.

When all of the water is discharged from the first cylinder tube 110, the first gas inlet valve 141 and the branch discharger 200 of the first cylinder tube 110 and the first water discharge valve The second gas inlet valve 142 or the third gas inlet valve 143 is connected to the branch discharge pipe 200 of the second cylinder pipe 120 or the branch discharge pipe of the second cylinder pipe 130 And the second water discharge valve 122 or the third water discharge valve 123 is opened to allow the coal gas to flow into the second cylinder pipe 120 or the third cylinder pipe 130. In this case, the water tank 160 is vertically moved by the height of the water charged in the second cylinder tube 120.

In addition, when a large amount of gas is discharged from a coal sample, continuous measurement can be performed by injecting water through a refill valve into the cylinder after measurement.

In detail, after the gas amount measurement using the first cylinder tube 110 is completed, the gas amount is measured using the second cylinder tube 120, the water is re-injected through the refill valve of the first cylinder tube during the measurement, When all the water in the two-cylinder pipe 120 is discharged, the amount of gas can be measured using the first cylinder pipe 110 again.

Therefore, as described above, by measuring the amount of water discharged from each of the cylinder tubes 110, 120, and 130, the amount of coal gas discharged from the coal core can be accurately measured.

After the completion of the measurement of the coal gas, the branch valve 240 constituting the branch discharger 200 is operated so that the gas in each of the cylinder tubes 110, 120 and 130 flows through the gas communication pipe 210 to the second branch And discharged to the engine 230.

Accordingly, the gas discharged to the second branch pipe 230 is supplied to the collection tank 310 or the syringe 320 and is collected.

As described above, according to the coal gas measuring apparatus having the branch collecting function of the measuring gas according to the present invention, since the branch discharger 200 provided in the manometer 100 selectively supplies or discharges the coal gas, Since the coal gas discharged from the branch discharger 200 is collected by the trapping unit 300, the measurement gas can be recycled or used for another test.

In the case where the collector 300 comprises a collecting tank 310 for storing coal gas, the collected large amount of coal gas can be transported to the collecting tank 310 and reused, and the collecting machine 300 can collect coal gas In the case of the syringe 320 being sucked in, the coal gas having a predetermined capacity can be easily collected and used.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be apparent to those skilled in the art that various changes, substitutions, and alterations can be made therein without departing from the spirit of the invention.

10: frame
50: Canister
100: Manometer
110: first cylinder tube
112: first water discharge valve
114: first refill valve
120: second cylinder tube
122: second water discharge valve
124: Second refill valve
130: third cylinder tube
132: Third water discharge valve
134: Third refill valve
140: gas inlet pipe
141: first gas inlet valve
142: second gas inlet valve
143: third gas inlet valve
150: First water discharge pipe
160: aquarium
200: branch ejector
210: Gas communication pipe
220: 1st branch
230: The second branch
230: Branch valve
300: Collector
310: collection tank
320: Syringe

Claims

A canister for collecting coal gas discharged from the coal core and discharging the collected coal gas;
An agitator connected to the canister for supplying a coal gas, measuring a gas amount of the coal gas through an amount of water supplied by the coal gas in a state where the water is filled and discharged by the coal gas;
A branch discharger which is openably and closably provided in the manometer and supplies the coal gas discharged from the canister to the agitator or the coal gas which has been measured in the agitator is branched from the canister in the agitator; And
And a collector for collecting coal gas communicatively connected to the branch discharger and discharged from the branch discharger,
The branch ejector includes:
A gas communication tube communicably connected to the agonometer to communicate coal gas;
A first branch pipe having one end connected to the gas communication pipe and the other end connected to the canister;
A second branch pipe having one end connected to the gas communication pipe and the other end connected to the collecting device while being branched from the first branch pipe; And
The gas communication pipe is provided at a connection portion between the gas communication pipe and the first branch pipe and the second branch pipe, and the gas communication pipe is selectively connected to the first branch pipe or the second branch pipe while opening and closing the gas communication pipe And a branch valve. The coal gas measurement device has a branch collecting function of the measured gas.

The method according to claim 1,
The collecting device includes:
A collecting tank connected to the second branch of the branch discharger for storing coal gas discharged to the second branch, a coal tank communicably connected to the second branch and discharging coal gas to the second branch, And a syringe sucked at a preset capacity. The apparatus for measuring coal gas according to claim 1,

The method according to claim 1,
The above-
A frame forming an outer shape;
At least one cylinder tube mounted inside the frame and being disposed in a direction perpendicular to the paper surface, the water being charged into the cylinder;
A gas inflow valve connected to the branch discharge device so as to be openable and closable so as to introduce coal gas discharged from the canister into the branch discharge device;
A water discharge valve which is installed at the lower end of the cylinder tube so as to be openable and closable and discharges the water to the outside by the pressure of the coal gas flowing into the cylinder tube;
A first water discharge pipe connected to the water discharge valve at one end thereof; And
And a water tank mounted on one side of the frame and connected to the other end of the first water discharge pipe so that water discharged by opening each water discharge valve is introduced,
Wherein the water tank is slidable along one side of the frame in a direction perpendicular to the paper surface.

The method of claim 3,
In the water tank,
An inlet hole formed on a bottom surface of the first water discharge pipe and coupled with the other end of the first water discharge pipe;
A discharge hole formed on an upper side of the side surface and coupled with the second water discharge pipe so that water flowing through the inlet hole is discharged to the outside when the water reaches a certain height in the water tank;
A guide member mounted on an outer surface of the water tub;
A guide rail formed on one side of the frame and coupled with the guide member to guide vertical movement of the slide of the water tub; And
And a fixing member mounted on the guide member and fixing the guide member to the guide rail,
In the water tank,
And the water is filled up to the height of the discharge hole.

The method of claim 4,
In the water tank,
Is vertically moved in accordance with a height of water with respect to the cylindrical tube through which water is discharged.

The method of claim 3,
The above-
Further comprising a refill valve disposed above the side surface of the cylinder tube for supplying water into the cylinder tube.

The method of claim 3,
And a horizontal level indicating the horizontal position of the frame is mounted on a lower center of the frame.

The method of claim 3,
The above-
Further comprising an auxiliary water supply unit disposed above the water tank and supplying water to the inside of the water tank so as to maintain the water filled up to the height of the discharge hole. Measuring device.