JPH11108784A - Blocking pressure automatic measuring equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily identify a blocking pressure by displaying a measured instruction pressure as a blocking pressure when the continuance of the use stop state of a combustor is determined. SOLUTION: When a pressure switch 33 is turned ON, a pressure value is displayed on a third display section 23. Then, if the displayed pressure of the third display section 23 is normal when a zero point switch 34 is set to a normal mode, a difference between the maximum and minimum values of a pressure value measure for 10 sec. is a specified value or higher and the measured pressure value is moved up and down, the on-going use of the combustor is determined. When a sudden pressure change occurs during the use of the combustor, the storing of the measured valve is stopped for 5 sec., and after the passage of 5 sec., the storing of the measured pressure value is started. If a display on the third display section 23 is at most a prescribed value at this time, a measured value for 10 sec., is stored. If a difference between the maximum and minimum value thereof is at most a prescribed value and a pressure change thereof is raised or lowered in one direction, the stopped state of using the combustor is determined. When the use stopped state of the combustor is determined, the display of the passage of time of a first of a first display section 21 is started, and a measured pressure value after 1 min. from the start is displayed as a blocking pressure value on a second display section 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic closing pressure measuring device for measuring a regulating pressure in a pressure regulator of a gas container provided downstream of a combustor and measuring a closing pressure. is there.

[0002]

2. Description of the Related Art In a gas container, it is legally required to periodically check a pressure regulator. In such a check, a pressure gauge such as a pointer-type pressure gauge, a manometer, or a self-recording pressure gauge is provided at a stage subsequent to the pressure regulator. A gauge is attached to check whether the adjusted pressure and the closing pressure measured by the pressure gauge are appropriate. The adjusted pressure is the pressure indicated by the pressure gauge when the combustor is used on the downstream side of the gas container, and the closing pressure is the value when the use of the combustor is stopped after checking the adjusted pressure. The pressure indicated by the pressure gauge after standing for 1 minute or more.

[0003]

However, among the above-mentioned inspections, in the measurement of the closing pressure, the operator also has to visually check the pressure indicated by the pressure gauge and measure the elapsed time of one minute or more. Therefore, the work involved in the inspection work was complicated. In addition, when measuring the elapsed time of one minute or more, it was not possible to leave the site, which was one of the factors that reduced the efficiency of inspection work. The present invention has been proposed in view of the above, and an object of the present invention is to provide an automatic occlusion pressure measuring device capable of easily confirming an occlusion pressure without any intervention and improving the efficiency of inspection work. And

[0004]

In order to achieve the above object, an automatic closing pressure measuring device according to the present invention measures a regulated pressure in a pressure regulator of a gas container provided with a combustor on a downstream side. In addition, in a closing pressure automatic measurement device that measures the closing pressure, a combustor use determining unit that determines whether the combustor is in use based on the measured adjustment pressure, and the combustor is in use. When it is determined that, based on the measured adjusted pressure, combustor stop determination means for determining whether the combustor has entered the use stop state,
A combustor stop continuation determining means for determining whether the use stop state has continued for a predetermined time when it is determined that the combustor has entered the use stop state; The indication pressure measured at the time of determining that the continuation is continued is displayed as the closing pressure.

[0005]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a front view of a portable digital manometer used for automatic measurement of closing pressure according to the present invention, FIG. 2 is a rear view, FIG. 3 is a side view, and FIG. FIG. 5 is a partially cutaway rear view showing the state of the gas intake section during storage.

In these figures, a portable digital manometer 1 is used for a gas leak test and an automatic closing pressure measurement according to the present invention, and is constituted by a pocket-sized case 10 composed of a combination of a front case 10a and a back case 10b. Have been.

The display screen 2 is provided on the upper half of the front case 10a.
And an operation section 3 is formed in the lower half.

As shown in FIG. 1, a display screen 2 displays the inner volume of the pipe on the gas equipment side at the time of the leak test and the elapsed time at the time of the leak test and the measurement of the closing pressure as shown in FIG. The first display unit 21 displays a gas pressure value at the start of the leak test and a second display unit 22 for displaying the closing pressure value at the time of automatic measurement of the closing pressure on the upper right, and the result of the leak test is obtained in the center of the screen. A third display unit 23 for switching and displaying the leak amount and the gas pressure value in real time is provided.
Further, a hold lamp 24 indicating that the display gas pressure is being held is provided on the upper left of the third display unit 23, and a voltage warning lamp for warning of a drop in the power supply voltage is further provided on the lower left of the third display unit 23. 25 are provided respectively. further,
An L / h lamp 26 indicating the unit when the display on the third display unit 23 is switched to the amount of leakage is provided at the lower right of the third display unit 23.

The operation unit 3 includes three key switches, a hold switch 31 for temporarily holding the pressure display on the display screen 2, a leak test switch 32, and a pressure switch (main key) 33 in order from the left side. They are arranged.

[0010] As shown in FIG.
A swelling portion 10c is formed in the upper half of the swelling portion 10c.
An opening / closing lid 10d which opens outward is pivotally mounted on the further upper half of the device, and a gas intake portion 4 is attached inside the bulging portion 10c (FIGS. 4 and 5).

The gas intake unit 4 has a base 41
A base shaft 42 is fitted through an O-ring to a bearing 41a protruded from the cylinder 43, and a cylinder 43 is slidably fitted to the base shaft 42 via an O-ring or a C-ring. 43 is provided with a gas inlet 44 which is bent at a right angle and is rotatable 360 ° around a base shaft 42 by means of a bearing mechanism (not shown), and a connection attachment 45 is connected to the gas inlet 44. The connection attachment 45, the gas intake port 44, the cylinder 43, the base shaft 42, the bearing 41a, and the base 42 communicate with the gas passage 4a therein, and the base 41, which is the end of the gas passage 4a, The pressure sensor element 15 is disposed inside the inside.

The above-described gas intake section 4 is provided with a bulging section 10c.
In a normal unused state, the cylinder 43 is connected to the base 4 as shown in FIG.
2, the gas inlet 44 and the connection attachment 45 are housed in the space above the bulging portion 10c, and the opening / closing lid 10d is also closed (two-dot chain line in FIG. 3). When used, the opening / closing lid 10d is opened (FIG. 3).
, The gas intake port 44 is lifted by hand, the cylinder 43 is slid along the base shaft 42, pulled out and set, and then the lid 10d is closed again. The opening / closing lid 10d has a part cut off at the upper end so as not to interfere with the gas inlet 44.
When d is closed, the gas inlet 44 and the connection attachment 45 project upward from the opening / closing lid 10d (FIGS. 1, 2, 3, and 4).

In the lower half of the back case 10b, as shown in FIGS. 2 and 4, a battery storage room 10e provided with a lid 19 which can be slid downward and opened is recessed into three AAA batteries. .. Are stored, and a zero point switch 34 is provided above the battery storage chamber 10e to be in a normal mode when slid to the left and to be in a zero adjustment mode when slid to the right.

FIG. 6 is a block diagram showing the internal configuration of the portable digital manometer. Inside the front case 10a, one board 100 as shown in the figure is arranged,
On this single substrate 100, a CPU, a ROM, a RAM
And the like, and various components connected to the microcomputer. The CPU executes the means according to claim 1 of the present invention, that is, the function of the combustor use determining means, the combustor stop determining means, the combustor stop continuation determining means, and the function of displaying the closing pressure. It is configured as a software function.

The microcomputer 11 has a power supply of 150
A dry battery 12 that can be used for 0 hours or more is connected, and a battery voltage drop detection circuit 13 for detecting a drop in the battery voltage is connected. Further, the above-described pressure sensor element 15 is connected via an A / D converter 14. The pressure sensor element 15 is a high-resolution, high-performance semiconductor element capable of detecting up to, for example, 0.01 kPa, converts the detected gas pressure into an electric signal, and sends the signal to the microcomputer 11 via the A / D converter 14. doing.

Further, a digital display unit 16 is connected to the microcomputer 11, and the digital display unit 16
Is to digitally display on the display screen 2 the gas pressure detected by the pressure sensor element 15, the elapsed measurement time measured by a built-in clock (not shown), the amount of leakage, the closing pressure, and the like. Further, the above-mentioned various keys, that is, the hold switch 31, the leak test switch 32, the pressure switch 33, and the zero point switch 34 are connected.

A case where the closing pressure in the pressure regulator is checked using the portable digital manometer 1 having the above configuration will be described below. The method for checking the closing pressure is described in the Liquid Stone Law / Ministerial Ordinance Supplementary Standard, as follows: "After igniting one combustor with the lowest gas consumption, confirming the adjusted pressure, and stopping the use of the combustor, After standing for more than a minute,
The indicated pressure is measured using a manometer or the like, and the measured pressure is equal to or lower than a specified pressure. "

FIG. 7 is a view showing a state in which a portable digital manometer is connected to a pressure regulator to be inspected. In the figure, a pressure regulator 6 to be checked is a gas container 5
A gas plug 9 and a membrane gas meter 8 are interposed in the supply pipe 7 on the gas outlet side (later stage side) of the pressure regulator 6. Is provided with one or more combustors (not shown) as gas supply destinations. Further, the portable digital manometer 1 is attached to the inspection hole 9a branched from the gas stopper 9 by fitting the gas intake portion 4 thereto.

Normally, the inspection hole 9a is held in a closed state, and the gas entering the pressure regulator 6 and the supply pipe 7 from the gas container 5 passes through the gas stopper 9 and the membrane gas meter 8 to the combustor. Supplied to When the portable digital manometer 1 is attached to the inspection hole 9a for measuring the closing pressure, the gas container 5
Is supplied to the combustor side and introduced into the portable digital manometer 1. The portable digital manometer 1 detects the gas pressure at that time by the pressure sensor element 15, and displays the third gas on the display screen 2. The digital value is displayed on the display unit 23 in real time.

The pressure detected by the portable digital manometer 1 upstream of the membrane gas meter 8 is shown in FIG. 8 during operation of the gas meter (during use of the combustor) due to the structure of the membrane gas meter 8. As shown in the figure, a pressure change (vertical movement, tilt) in a constant cycle according to the flow rate is observed. That is,
Since the membrane gas meter 8 converts the reciprocating motion of the two membranes to be measured into a rotary motion by a crank mechanism, a force fluctuates during one rotation of the crank mechanism, which causes a pressure change (tilt). Appears as.

In the pressure regulator 6 during use of the combustor,
The pressure adjustment function constantly adjusts the nozzle opening to keep the outlet pressure constant irrespective of the inlet pressure. On the other hand, when the use of the combustor is stopped, the action of closing the nozzle of the valve works, but there is a slight time delay there. Therefore, immediately after the use of the combustor is stopped, the pressure detected by the portable digital manometer 1 is as shown in FIG. As shown in the figure, the pressure becomes slightly higher than during use of the combustor.

During the subsequent stop of the gas meter (while the use of the combustor is stopped), since the tilt does not occur, the pressure does not change (FIG. 8 (A)), or the pressure increases slowly in one direction (FIG. 8 (A)). B)) or a slowly changing pattern in one direction (FIG. 8C). The case of FIG. 8 (A) where the pressure does not change is general, and the slow rise of FIG. 8 (B) occurs when the shut-off valve of the combustor is poorly closed, and the slow rise of FIG. 8 (C) occurs. The descent occurs when the operation is stopped from a use state where the gas flow rate is large.

The automatic measurement of the closing pressure in this embodiment is as follows.
This is performed based on the detection of gas pressure fluctuations that appear when the combustor provided with the above-mentioned film-type gas meter 8 is used or stopped, and it is determined that the combustor is in use while the tilt occurring during operation of the gas meter is detected. Then, when the above-described pressure change pattern occurring while the gas meter is stopped is detected, it is determined that the use of the combustor is stopped, and the indicated pressure when the use stop determination state continues for one minute is displayed as the closing pressure.

The check of the closing pressure will be described concretely step by step. First, when the operator turns on the pressure switch 33 and turns on the power, the battery voltage drop is checked and the third
The display section 23 displays the pressure value. When the zero point switch 34 is on and the display on the third display unit 23 is other than 0.00 kPa, the hold switch 31 is turned on to perform the zero point adjustment. This zero adjustment
The gas pressure value P at the time when the hold switch 31 is turned on is indicated by a minus sign to provide a correction value “−P”, and the correction value “−P” is added to the gas pressure value P at the present time to display the pressure. Is set to 0.00 kPa.

Next, when the display pressure value of the third display unit 23 when the zero point switch 34 is set to the normal mode is 2.0 kPa or more and 5.5 kPa or less, that is, when the pressure is normal, The measured pressure values for the past 10 seconds are stored while being updated. When the difference between the maximum value and the minimum value of the measured pressure value for 10 seconds is 0.02 kPa or more and the measured pressure value moves up and down, it is determined that the combustor is in use.

If the pressure changes abruptly during the "during use of the combustor", for example, if the difference between the previously measured pressure value and the current measured pressure value is 0.03 kPa or more, the used combustor is changed or added, or the used combustion is used. Judgment that the vessel was stopped
The storage of the measured pressure value for 0 seconds is cleared, the storing of the measured pressure value is stopped for 5 seconds, and the storage of the measured pressure value is started again after 5 seconds. The five seconds is a time for stabilizing a sudden change in pressure that occurs when the used combustor is changed or added, or when the used combustor is stopped.

If the third display 23 at this time is, for example, not less than 2.0 kPa and not more than 5.5 kPa, the measured pressure value for 10 seconds thereafter is stored. When the difference between the maximum value and the minimum value is 0.01 kPa or less, or 0.05 kPa or less and the pressure change is 1
In the case of rising or falling in the direction, it is determined that the use of the combustor is stopped (combustor stopped state). When it is determined that the combustor is in the stopped state, the elapsed time display on the first display unit 21 is started, and when it is determined that the combustor is in the stopped state thereafter, the measured pressure 1 minute after the start of the elapsed time display is displayed. The value is displayed on the second display unit 22 as a closing pressure value. Even after the start of the elapsed time display on the first display unit 21,
When the condition of the combustor stopped state is no longer satisfied,
Stop the elapsed time display and return to.

Next, the above-mentioned portable digital manometer 1
In the following, a processing procedure relating to the automatic measurement of the closing pressure executed by the microcomputer 11 will be described with reference to FIGS.

FIGS. 9 and 10 are flow charts showing a processing procedure relating to the automatic measurement of the closing pressure according to the present invention.

In the portable digital manometer 1, when the pressure switch 33 is turned on and the power is turned on, the battery pressure is checked, the zero point is adjusted, and the like.
Is displayed on the second display unit 22 as a digital value, and the process proceeds to the next step S2. The pressure sensor element 15 is zero-adjusted at the atmospheric pressure, detects the differential pressure from the atmospheric pressure, and displays it in “kPa”.

In step S2, the displayed pressure is
It is determined whether the pressure is between 2.0 kPa and 5.5 kPa, and if not, it is determined that the pressure cannot be measured because the pressure is too low or too high. The determination in step S2 is repeatedly performed. If the pressure is between 2.0 kPa and 5.5 kPa, it is determined that the pressure is normal and the process proceeds to the next step S3.

In step S3, the latest measured pressure values P0 to P10 for 10 seconds are updated and stored, and the flow advances to the next step S4.

In step S4, the measured pressure values P0 to P10
Difference between the maximum value PMAX and the minimum value PMIN is 0.02 kP
It is determined whether or not the pressure is equal to or more than a. If the pressure is equal to or more than 0.02 kPa, the process proceeds to the next step S5.

In step S5, the measured pressure values P0 to P10
It is determined whether or not there is vertical movement, and if there is vertical movement,
Since tilting has occurred, it is determined that "the combustor is in use", and the process proceeds to the next step S6. If there is no vertical movement, it is determined that the combustor is not in use, and the process returns to step S2.

In step S6, the previously measured pressure value Pn-1
The absolute value of the difference between the current measured pressure value Pn and this time is 0.03 kPa
When the pressure is 0.03 kPa or more, there is a sudden pressure change during “in use of the combustor”, and either the change or addition of the used combustor or the stop of the used combustor is performed. Assuming that there is, proceed to the next step S7,
If it is equal to or less than 0.03 kPa, the process returns to step S2.

In step S7, the storage of the measured pressure values P0 to P10 for the past 10 seconds is cleared, the storage of the measured pressure values is stopped for 5 seconds, and the flow advances to the next step S8.

In step S8, storage of the measured pressure value is started again, and the flow advances to the next step S9. In step S9, the pressure displayed on the third display unit 23 is 2.0 kPa
It is determined whether or not the pressure is equal to or less than 5.5 kPa, and if not, the process returns to step S2 and the pressure is reduced to 2.0 kPa.
If it is between Pa and 5.5 kPa, the process proceeds to the next step S10.

In step S10, the measured pressure values P0 to P10 for 10 seconds are stored, and the next step S11 (FIG. 10)
Proceed to.

In step S11, the measured pressure values P0 to P
The difference between the maximum value PMAX and the minimum value PMIN of 10 is 0.01k
It is determined whether or not the pressure is equal to or lower than Pa. If the pressure is equal to or lower than 0.01 kPa, it is determined that the combustor is in a stopped state (combustor stopped state) with almost no pressure change and a step S
The process skips to step 13 and proceeds to the next step S12 if the pressure is 0.01 kPa or more.

In step S12, it is determined whether or not the measured pressure values P0 to P10 for 10 seconds increase or decrease in one direction and the pressure change is 0.05 kPa or less.
If this determination is “YES”, the process proceeds to the next step S13 assuming that the combustor is in a stopped state, and if “NO”, the process returns to step S2.

In step S13, it is determined that the combustor has entered the use stop state, the elapsed time measurement is started, the elapsed time display on the first display unit 21 is started, and the flow advances to the next step S14.

In step S14, it is determined whether or not "combustor in use" has been determined within one minute of the elapsed time.
If there is a determination of "in use of the combustor", the process branches to step S19. If there is no determination of "in use of the combustor", it is determined that one minute has elapsed after entering the "combustor stopped state". Proceed to S15.

In step S19, the display of the elapsed time is stopped, and the process returns to step S2.

In step S15, it is determined that the use stop state of the combustor has continued for one minute, the indicated pressure value at that time is displayed on the second display section 22 as the closing pressure value, and the flow advances to the next step S16. The portable digital manometer 1 may be provided with an external output terminal separately, and a printer or a telephone line may be connected to the external output terminal to print and record the above-described closing pressure value data or transmit the data.

In step S16, the leak test switch 3
It is determined whether or not 2 is on. If it is on, the process branches to step S20. If it is not on, the next step S1 is performed.
Go to 7.

In step S17, it is determined whether or not the pressure switch 33 is turned on. If the pressure switch 33 is on, the power is turned off as it is. If not, the next step S18 is performed.
Proceed to.

In step S18, it is determined whether or not the time is over. If the time is over, the power is turned off as it is.
Return to

In step S20, a leak test on the combustor side (gas facility side) is started. This leak test is performed as follows. First, the gas pressure when the leak test switch 32 is turned on is
The pressure at the start of the leak test is stored and displayed on the second display unit 22. Thereafter, when the leak test switch 32 is turned on for the second time, the leak test is terminated. The pressure at the end is stored and displayed on the third display unit 23, and the elapsed time during that time is stored as the leak test time and displayed on the first display unit 21.

After the end of the leak test, when the operator further turns on the leak test switch 32, the amount of leak from the gas equipment is calculated based on the following equation (1), and the calculation result is displayed on the third display unit 23. , The unit L / h is also displayed by the L / h lamp 26.

(Equation 1) The amount of leakage at this time is determined assuming that the internal volume of the pipe of the gas equipment is a constant value, for example, 1 liter, and the amount of leakage per liter is obtained. In addition to displaying the calculation result of the leak amount, the volume of the pipe (1 liter in this case) at this time is displayed on the first display unit 21, and the value of the initial gas pressure at the start of the leak test is displayed on the second display unit 22, respectively. Displayed at the same time.

Thereafter, when the volume in the pipe is known and the operator wants to know the actual leakage amount in the known volume in the pipe, the operator presses the leak test switch 32 or the hold switch 31 to The known pipe internal volume can be input, and the microcomputer 11 calculates the above equation (1) based on the input known pipe internal volume.
Is used to calculate the leakage amount again, and the calculation result is displayed on the third display unit 23.

The input of the above-mentioned volume in the pipe is performed as follows using the leak test switch 32 and the hold switch 31. That is, every time the leak test switch 32 is pressed, the volume in the pipe increases by a predetermined volume (for example, 0.1 liter) from the above-mentioned constant value (1 liter), and increases by scrolling by continuously pressing. , Each time the hold switch 31 is pressed, the volume in the pipe becomes the above-mentioned constant value (1
Liter) is reduced by a predetermined volume (for example, 0.1 liter) by a predetermined volume (for example, 0.1 liter). The pipe volume at this time is displayed on the first display unit 21 in real time, and the operator sets the pipe volume to a known value while watching the display.

As described above, in this embodiment, the closing pressure can be automatically measured just by turning on the switch, so that the checking and checking of the closing pressure can be performed easily without any intervention. In addition, other operations can be performed in parallel, and the inspection work can be efficiently performed. Furthermore, since the inspection can be performed without the operator visually checking the pointer of the pressure gauge, a visual error can be avoided and the inspection can be performed with high accuracy. In addition, using the pocket-sized portable digital manometer 1, various inspection operations such as confirmation of adjustment pressure, confirmation of closing pressure, and leak test can be automatically performed, and the convenience of the operator is sufficiently achieved. Has become.

In the above description, the use of the combustor is determined based on the pressure fluctuation generated during the operation of the membrane gas meter 8, and the closing pressure is automatically measured. In the equipment without the above, if the detection sensitivity of the pressure sensor element 15 is increased by one digit, the pressure fluctuation of the pressure regulator 6 can be detected, and the use / stop of the combustor is similarly determined using the pressure fluctuation. The automatic measurement of the closing pressure can be performed.

[0054]

As described above, according to the automatic closing pressure measuring device of the present invention, the closing pressure can be automatically measured just by turning on the switch. Can be performed, and other operations can be performed in parallel, so that the inspection work can be efficiently advanced. Furthermore, since the inspection can be performed without the operator visually checking the pointer of the pressure gauge, a visual error can be avoided and the inspection can be performed with high accuracy.

[Brief description of the drawings]

FIG. 1 is a front view of a portable digital manometer used for automatic measurement of closing pressure according to the present invention.

FIG. 2 is a rear view of the portable digital manometer.

FIG. 3 is a side view of the portable digital manometer.

FIG. 4 is a partially cutaway rear view showing a state of a gas intake unit when the portable digital manometer is used.

FIG. 5 is a partially cutaway rear view showing a state of a gas intake unit when the portable digital manometer is stored.

FIG. 6 is a block diagram showing an internal configuration of a portable digital manometer.

FIG. 7 is a diagram showing a state in which a portable digital manometer is connected to a pressure regulator to be inspected.

FIG. 8 is a diagram showing a change in an adjustment pressure detected by a portable digital manometer.

FIG. 9 is a diagram showing a flowchart of a processing procedure relating to automatic measurement of closing pressure according to the present invention.

FIG. 10 is a diagram showing a flowchart of a processing procedure relating to automatic measurement of closing pressure according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Portable digital manometer 2 Display screen 3 Operation part 4 Gas intake part 4a Gas flow path 5 Gas container 6 Pressure regulator 6a Container valve 7 Supply pipe 8 Membrane gas meter 9 Gas stopper 9a Inspection hole 10 Case 10a Front case 10b Back case 10c Swelling part 10d Opening / closing lid 10e Battery storage room 11 Microcomputer 12 Dry battery 13 Battery voltage drop circuit 14 A / D converter 15 Pressure sensor element 16 Digital display part 19 Lid 21 First display part 22 Second display part 23 Third display Part 24 Hold lamp 25 Voltage warning lamp 31 Hold switch 32 Leak test switch 33 Pressure switch 34 Zero point switch 41 Base 42 Main shaft 43 Cylinder 44 Gas inlet 45 Connection attachment 100 Substrate

Claims (4)

[Claims] 1. A closing pressure automatic measuring device for measuring a regulated pressure in a pressure regulator of a gas container provided on a downstream side with a combustor and measuring a blocking pressure, wherein the combustor is in use. A combustor use determining means for determining whether or not the combustor is used based on the measured adjustment pressure; and when the combustor is determined to be in use, the combustor is brought into a stopped state based on the measured adjustment pressure. Combustor stop determination means for determining whether or not the burner has entered, and combustor stop continuation determination means for determining whether or not the use stop state has continued for a predetermined time when determining that the combustor has entered the use stop state. And an indication pressure measured when it is determined that the use stop state of the combustor has continued for a predetermined time, as an occlusion pressure. 2. The automatic closing pressure measuring device according to claim 1, wherein the combustor is provided with a membrane gas meter on an upstream side thereof. 3. The blockage according to claim 2, wherein the combustor use judging means judges that the combustor is in use when detecting a tilt generated during operation of the membrane gas meter. Automatic pressure measurement device. 4. The combustor stop judging means, when detecting the tilt, a difference between the adjusted pressure of the previous measurement and the adjusted pressure of the current measurement becomes equal to or greater than a predetermined differential pressure, and thereafter, the change of the adjusted pressure after a lapse of a predetermined time. The closing pressure automatic measuring device according to claim 3, wherein it is determined that the combustor has entered the use stop state when is substantially constant, gradually increases, or gradually decreases.