JP4850024B2 - Fuel gas sampling vessel for combustion test - Google Patents

Description

  The present invention relates to a fuel gas sampling container for a combustion test for collecting a combustible gas and conducting a combustion test.

  Examples of the gas generated at the ironworks include blast furnace gas, coke oven gas, converter gas, and mixed gas obtained by mixing them. It is a so-called by-product gas. This by-product gas is led from the steel works to the gas use facility by gas piping, but the inside of the piping is filled with by-product gas according to the operating state of the use facility, or the by-product gas is replaced with non-combustible gas. In addition, this incombustible gas may be replaced with air.

  Some gas pipes have a diameter of 4 meters or more and a long length, and the volume of the pipe is very large. In addition, the piping is not a simple straight pipe, but has a complicated shape such as a bent portion, a branch pipe, and the front and rear of a large valve. Therefore, in order to confirm whether or not the gas in the pipe has been replaced with a predetermined gas, the gas is collected at several sites and the properties of the collected gas are examined.

  As a method of confirming whether or not the gas in the pipe has been replaced by by-product gas, a method of measuring the concentration of the collected gas components (carbon monoxide, hydrogen, etc.) with a measuring instrument and confirming the collected gas There is a combustion test to confirm that it is in a state where it ignites and does not explode and is stably combusted while mixing with the atmosphere. Combustion tests can be performed with any fuel of by-product gas generated at steelworks, and management such as inspection and calibration of measuring instruments is not required unlike the concentration measurement method, so it can be carried out easily. It is used in the field.

  For gas sampling, a fuel gas sampling container for combustion test with a lid is used. The fuel gas sampling container for a combustion test includes a cylindrical container body whose one end is closed and a lid which is separated from the container body. The gas is collected as follows. First, one operator holds the container body, opens the lid, and inserts the gas sampling nozzle into the container body. Another operator opens the gas sampling nozzle valve and introduces the sample gas into the container body. After the air in the container body is replaced with the sample gas, one operator closes the valve of the gas sampling nozzle and at the same time another operator quickly closes the lid.

  Then, the two operators move to a safe place, and one operator slowly opens the lid of the fuel gas sampling container for combustion test, and at the same time, the other operator moves to the gas released from the container body. Ignite and observe the state of combustion. These series of operations must be performed quickly and without losing timing. Otherwise, the collected gas will leak into the atmosphere, or during the combustion test, ignition cannot be performed well and accurate determination cannot be made. For this reason, a certain level of skill is required for this work.

  The conventional fuel gas sampling container for combustion test has two operators, an operator who holds the container body and opens and closes the lid when collecting gas, and an operator who opens and closes the valve of the gas sampling nozzle. In addition, in the combustion test after gas sampling, two operators, the operator who holds the container body and opens the lid, and the operator who ignites the released gas are required. If the lid opening / closing timing does not match the ignition timing and the ignition does not occur, it cannot be determined whether there is a problem with the gas or the ignition method. Further, since the gas is released into the atmosphere, it is not preferable for safety and environment.

  In order to solve the above problem, it is conceivable to use a container having valves at both ends, but the collected gas pressure is as low as several tens of millimeters of water and the opening is small. However, a sufficient amount of gas is not released, and ignition and combustion are likely to be unstable, and it is difficult to judge the test results.

  An object of the present invention is to provide a fuel gas sampling container for combustion test that can be safely operated by one person.

The fuel gas sampling container for combustion test according to claim 1, having a size that can be held with one hand and a cylindrical container having an open end for storing flammable sample gas;
A plate-like lid pivotally mounted to cover the opening of one end of the tubular container has a insertable hole gas sampling nozzle,
And closing means for opening and closing the lid with one touch,
A flexible sealing plate that can receive a gas sampling nozzle and has a notch attached to the front surface of the lid so as to cover the hole, and is rotatably attached to the upper portion of the lid via a hinge. An inner lid covering from the inside of the cylindrical container, and a gas leakage preventing means attached to a lower portion of the lid for attracting the inner lid to prevent leakage of sample gas;
And a gas discharging means provided at the other end of the tubular container,
It is characterized by including.

The fuel gas sampling container for combustion test according to claim 2, wherein the gas discharge means includes a backflow prevention mechanism .

4. The fuel gas sampling container for combustion test according to claim 3 , wherein the opening / closing means is pivotable in a vertical direction around a bearing orthogonal to the longitudinal axis of the cylindrical container and has one end connected to the lid. When,
A spring attached to the cylindrical container so as to push up the other end of the lever and press the lid against the cylindrical container;
A support base attached to the upper outer wall of the cylindrical container for rotatably supporting the bearing;
It is characterized by including .

The fuel gas sampling container for combustion test according to claim 4 , wherein the cylindrical container has an inclined end surface to which the lid is attached,
The support base is attached to an outer wall having the longest length in the longitudinal direction of the cylindrical container.

According to the first aspect of the present invention, the fuel gas sampling container for combustion test has a size that can be held with one hand and has a cylindrical container that is open at one end for storing flammable sample gas, and gas sampling. Can accept a gas sampling nozzle, a plate-shaped lid that has a hole into which a nozzle can be inserted, and is pivotably attached to cover the opening at one end of the cylindrical container, an opening / closing means that opens and closes the lid with a single touch because it includes a gas leakage prevention means for preventing the out Npurugasu leakage, and while maintaining the fuel gas sampling vessel for combustion testing with one hand, can perform a valve or ignition operating gas sampling nozzle on the other hand It is. Also, one end of the cylindrical container opens, and the lid attached to cover this opening rotates, so that the collected gas can be released sufficiently by opening the lid, and the combustion test is ensured. Can be done. Furthermore, since the gas discharge means is provided at the other end of the cylindrical container, the fuel gas can be collected more safely. In particular, the gas leakage prevention means includes a flexible sealing plate having a notch attached to the front surface of the lid so as to cover the hole, and a hole that is rotatably attached to the upper portion of the lid via a hinge. Since it has an inner lid that covers from the inside and a magnet that is attached to the lower part of the lid and attracts the inner lid, the fuel gas can be collected with the lid closed, and the fuel gas can be collected with a simple operation be able to. Further, since the inner lid is attracted by the magnet and is in close contact with the lid, the fuel gas can be prevented from leaking, and the operation can be performed safely. As described above, one person can safely and reliably perform a series of operations from collection of fuel gas to combustion test.

According to the second aspect of the present invention, since the gas discharge means includes the backflow prevention mechanism, it is not necessary to open and close the gas discharge valve for collecting the fuel gas, and the fuel gas can be collected easily. Can do. In addition, since the backflow prevention mechanism is provided, the external air enters the combustion test fuel gas sampling container, and does not react with the fuel gas and does not ignite, so that the fuel gas can be collected safely.

According to the third aspect of the present invention, the opening / closing means includes a lever that is rotatable in a vertical direction around a bearing orthogonal to the longitudinal axis of the cylindrical container and that connects one end to the lid, and the other end of the lever. And a spring attached to the cylindrical container so as to press the lid against the cylindrical container, and a support base attached to the upper outer wall of the cylindrical container that rotatably supports the bearing. It can be opened and closed with one hand, and a series of operations from collection of fuel gas to combustion test can be performed by one person. Further, since the lid is pressed against the cylindrical container by the spring, it is possible to prevent the fuel gas from leaking and to perform the work safely.

According to the fourth aspect of the present invention, the cylindrical container is inclined at the end face to which the lid is attached, and the support base is attached to the outer wall having the longest length in the longitudinal direction of the cylindrical container. When the lid is closed, the inner lid is surely pressed against the lid by gravity, the sealing degree is improved, and fuel gas leakage can be more reliably prevented.

  FIG. 1 is a longitudinal sectional view showing a schematic structure of a fuel gas sampling container 10 for a combustion test as a first embodiment of the present invention. FIG. 2 is an AA arrow view shown in FIG. FIG. 3 is a longitudinal sectional view showing a state in which the gas sampling nozzle 50 is inserted into the combustion test fuel gas sampling container 10 shown in FIG.

  The fuel gas sampling container for combustion test 10 is used for receiving the gas sampling nozzle 50, collecting a combustible gas, igniting it, and performing a combustion test to determine the properties of the collected gas. The portable device has a size and weight that can be held with one hand. The fuel gas sampling container 10 for a combustion test includes a cylindrical container 11 capable of storing a sample gas, and a handle 12 for holding the cylindrical container 11 with one hand is attached to an upper outer wall of the cylindrical container 11. Yes. One end of the cylindrical container 11 has a large opening, and a lid 42 is rotatably attached so as to cover the opening. The lid 42 is connected to the opening / closing means 30 and can be opened / closed with one touch, and a gas leakage preventing means 40 is attached to the lid 42. On the other hand, the other end of the cylindrical container 11 is a tapered portion 13, and a gas discharge means 20 is provided at the end.

  The lid 42 is a plate-like body having a hole 41 through which the gas sampling nozzle 50 is inserted and removed. When the lid 42 is opened, the opening at one end of the cylindrical container 11 is fully opened, and the internal gas is quickly released. It is slightly larger than the outer diameter of the cylindrical container 11 so that it can be discharged. The hole 41 formed in the lid 42 has a size that allows the gas sampling nozzle 50 having an outer diameter of several tens of millimeters to be easily inserted and removed. Further, a gasket 14 for securing a sealing property when the lid 42 is closed is attached to an end portion of the cylindrical container 11, thereby ensuring a sealing property between the cylindrical container 11 and the lid 42.

  The opening / closing means 30 includes a lever 31, a support base 32, and a spring 33, and can open and close the lid 42 with one touch. The lever 31 includes a pressing plate 34, a bearing 35, and an opening / closing plate 36. One end of the presser plate 34 is disposed in the vicinity of the handle 12, the other end is attached to the upper outer periphery of the bearing 35, and the intermediate part of the presser plate 34 is constantly pushed up by a spring 33. One end of the opening / closing plate 36 is attached to the lower part of the outer periphery of the bearing 35, and the other end is attached to the upper part of the lid 42. The bearing 35 is rotatably supported by a support base 32 attached to the upper part of the cylindrical container 11 between the lid 42 and the handle 12 via a support pin 37. Thereby, the lever 31 can be rotated around the bearing 35. Further, since one end of the holding plate 34 is disposed in the vicinity of the handle 12, it can be pushed down by the finger of the hand holding the handle 12. Since the spring 33 is attached between the handle 12 and the support base 32 and acts in a direction to push up the presser plate 34, the spring 33 is attached to an opening / closing plate 36 that rotates in the direction opposite to the presser plate 34 around the bearing 35. A force is always applied to the lid 42 in the closing direction.

  The gas leakage prevention means 40 is for preventing leakage of the sample gas not only during insertion but also after extraction of the gas sampling nozzle 50, and is flexible so as to cover the hole 41 formed in the lid 42. A seal plate 43, an inner lid 44 that covers the hole 41 from the inside, and a magnet 46 that attracts the inner lid 44 are provided. The seal plate 43 covering the hole 41 includes a large number of cuts 47 extending radially from the center toward the outer periphery, and is attached to the front surface of the lid 42 by a pressing plate 48. A hinge 45 is attached to the inner upper portion of the lid 42 via a height adjustment plate 49, and the hinge 45 supports an inner lid 44 that is attached so as to close the hole 41. Further, a magnet 46 is attached to the lower part of the lid 42. Thereby, since the inner lid 44 is normally attracted by the magnet 46, the inner lid 44 does not open against the operator's intention even if the cylindrical container 11 is swung. The attractive force of the magnet 46 is strong enough to easily open the inner lid 44 when the nozzle tip 52 of the gas sampling nozzle 50 is pushed in. The flexibility of the seal plate 43 is also strong enough to easily push the gas sampling nozzle 50.

  The gas discharge means 20 connected to the tip of the tapered portion 13 provided at the end of the cylindrical container 11 includes a backflow prevention mechanism 21. The backflow prevention mechanism 21 includes an inclined plate 24 having a small hole 22 and a flexible check plate 23 having one end that covers the small hole 22 attached to the inclined plate 24. When the sample gas is introduced into the fuel gas sampling container 10 for the combustion test, the check plate 23 is pushed up by the pressure of the sample gas, and the air inside is quickly pushed out through the small hole 22. When the gas sampling is finished, the check plate 23 having flexibility returns to its original position by its own weight, so that the small hole 22 is closed. Thereby, leakage of the stored gas and intrusion of external air can be prevented.

  A method of using the combustion test fuel gas sampling container 10 configured as described above will be described. The fuel gas sampling container 10 for combustion test is carried into the gas sampling site, one end of a hose (not shown) is connected to the gas discharge means 20, and the other end of the hose can be discharged even if a gas-air mixture is released. Connect to no safe place.

  A gas sampling nozzle 50 installed at a gas sampling site as a fixed facility of a plant includes a valve 51 with a small pipe having a diameter of about several tens of millimeters. One end thereof is open to the atmosphere, and the other end is attached to a large gas pipe having a diameter of several hundred millimeters to several meters by welding or the like, and the gas pipe is passed through the gas sampling nozzle 50 by opening and closing the valve 51. Gas can be taken out from. The valve 51 is a manual valve and is normally closed so that gas does not leak.

  The gas is sampled by grasping the handle 12 and pressing the seal plate 43 covering the hole 41 of the lid 42 against the nozzle tip 52 of the gas sampling nozzle 50. Since the seal plate 43 covering the hole 41 is flexible and is provided with a notch 47 as shown in FIG. 2, the nozzle tip 52 pushes the flexible seal plate 43 against the inner lid 44. Since the inner lid 44 is supported by the hinge 45 and is only attracted by the magnet 46, if the inner lid 44 is pushed a little, the inner lid 44 rotates upward about the hinge 45, and as shown in FIG. The sampling nozzle 50 can be inserted deeper. Since the flexible seal plate 43 is in close contact with the gas sampling nozzle 50, the gas in the cylindrical container 11 hardly leaks to the outside. The above operation can be performed with only one hand holding the handle 12.

  When the valve 51 is opened in the state shown in FIG. 3, the gas is pushed out and enters the cylindrical container 11 through the gas sampling nozzle 50. The air contained in the cylindrical container 11 or the air containing a part of the collected gas pushes up the flexible check plate 23 provided in the backflow prevention mechanism 21 and passes through the small hole 22 to the flare stack or the like by a hose not shown. Sent and processed safely. After the valve 51 is opened and a predetermined time has elapsed and the air in the cylindrical container 11 is completely replaced with the sample gas, the valve 51 of the gas sampling nozzle 50 is closed, and the fuel gas sampling container 10 for the combustion test is opened. When pulled out, first the inner lid 44 is closed by its own weight and the attractive force of the magnet 46, and then the flexible sealing plate 43 returns to its original flat shape and closes the hole 41 from the outside. However, it does not leak from the fuel gas sampling container 10 for combustion test. As for the gas discharge means 20, since the flexible check plate 23 provided in the backflow prevention mechanism 21 automatically closes the small hole 22, no operation is required, and when the fuel gas sampling container 10 for combustion test is carried. Can prevent gas leakage and intrusion of external air.

  Since the holding plate 34 is always pushed up by the spring 33 during and after the gas collection operation, the lid 42 attached to the opening / closing plate 36 that rotates in the opposite direction to the holding plate 34 is interposed via the gasket 14. Thus, even when the combustion test fuel gas sampling container 10 is carried by being strongly pressed against the cylindrical container 11, no gas leaks from the gap between the lid 42 and the cylindrical container 11. Further, since the inner lid 44 is also attracted by the magnet 46, the inner lid 44 will not open even if the combustion test fuel gas sampling container 10 is swung.

  The combustion test fuel gas sampling container 10 from which gas has been collected and stored as described above is carried to a safe and workable place, and a combustion test is performed according to the following procedure. First, when the presser plate 34 is pushed down with the hand holding the handle 12, the lid 42 attached to the opening / closing plate 36 that rotates in the opposite direction to the presser plate 34 is rotated upward at once, and the front surface of the cylindrical container 11. Are opened and the gas inside is released. At the same time, the gas emitted by an ignition device such as a lighter is ignited and burned to observe the combustion state. As described above, by using the fuel gas sampling container 10 for combustion test according to the present invention, it is possible to safely perform gas sampling and combustion test by one person.

  FIG. 4 is a longitudinal sectional view showing a schematic structure of a fuel gas sampling container 100 for combustion test as a second embodiment of the present invention. The same members as those shown in FIGS. 1 to 3 are denoted by the same reference numerals, and redundant description is omitted. The fuel gas sampling container 100 for combustion test shown in the second embodiment is characterized in that the end surface of the cylindrical container 101 to which the lid 42 is attached is cut obliquely. Since the support base 32 is attached to the outer wall having the longest length in the longitudinal direction of the cylindrical container 101, when the lid 42 is closed, the inner lid 44 is reliably pressed against the lid 42 by gravity. Thereby, the leakage of the gas at the time of gas sampling can be prevented more reliably.

  In the fuel gas sampling container 10 for the combustion test shown in the first embodiment, the inner lid 44 may not be closed when the cylindrical container 11 is tilted so that the lid 42 faces upward and the gas is collected. On the other hand, the fuel gas sampling container 100 for combustion test shown in the second embodiment is covered with the lid 42 of the cylindrical container 101 so that the inner surface of the lid 42 faces upward when the lid 42 is closed. Since the end face is cut obliquely, even when the cylindrical container 101 is tilted with the lid 42 facing upward, the inner lid 44 is pressed against the lid 42 by its own weight, so that gas leakage can be reliably prevented. However, in the fuel gas sampling container 100 for combustion test shown in the second embodiment, since the cylindrical container 101 is cut obliquely, the lid 42 and the gasket 14 are not circular but are oval, etc. Compared with the fuel gas sampling container for combustion test 10 shown in FIG. Even when the fuel gas sampling container 10 for the combustion test shown in the first embodiment is collected by tilting the cylindrical container 11 so that the lid 42 faces upward, the flexible sealing plate 43 is used. However, after closing the hole 41 from the outside and performing gas sampling, if the cylindrical container 11 is leveled, the inner lid 44 is closed, so there is almost no gas leakage.

  In the combustion test fuel gas sampling container 10 of the first embodiment and the combustion test fuel gas sampling container 100 of the second embodiment, the cylindrical containers 11 and 101 have a circular cross section. Of course, the cross sections of the containers 11 and 101 may be rectangular instead of circular. Since the pressure of the sampling gas is low, the pressure resistance of the cylindrical containers 11 and 101 does not need to be specially considered.

1 is a longitudinal sectional view of a fuel gas sampling container for combustion test 10 as a first embodiment of the present invention. It is the AA arrow line view of FIG. 1 which showed the fuel gas sampling container 10 for combustion tests as 1st embodiment of this invention. It is a longitudinal cross-sectional view which shows the state which inserted the gas sampling nozzle 50 in the fuel gas sampling container 10 for combustion tests as 1st embodiment of this invention. It is a longitudinal cross-sectional view of the fuel gas sampling container 100 for combustion tests as 2nd embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Combustion test fuel gas sampling container 11 Cylindrical container 20 Gas discharge means 21 Backflow prevention mechanism 30 Open / close means 31 Lever 32 Support base 33 Spring 35 Bearing 40 Gas leakage prevention means 41 Hole 42 Lid 43 Seal plate 44 Inner lid 45 Hinge 46 Magnet 47 Cutting 50 Gas sampling nozzle 100 Fuel gas sampling container 101 for combustion test Tubular container

Claims (4)

A cylindrical container having a size that can be held with one hand and having an open end that stores flammable sample gas;
A plate-like lid pivotally mounted to cover the opening of one end of the tubular container has a insertable hole gas sampling nozzle,
And closing means for opening and closing the lid with one touch,
A flexible sealing plate that can receive a gas sampling nozzle and has a notch attached to the front surface of the lid so as to cover the hole, and is rotatably attached to the upper portion of the lid via a hinge. An inner lid covering from the inside of the cylindrical container, and a gas leakage preventing means attached to a lower portion of the lid for attracting the inner lid to prevent leakage of sample gas;
And a gas discharging means provided at the other end of the tubular container,
A fuel gas sampling container for a combustion test, comprising: The fuel gas sampling container for combustion testing according to claim 1 , wherein the gas discharge means includes a backflow prevention mechanism. The opening / closing means is a lever that is rotatable in the vertical direction around a bearing orthogonal to the longitudinal axis of the cylindrical container and that connects one end to the lid;
Pushing up the other end of said lever, and a spring attached to the lid to the tubular container so as to press the tubular container,
A support base mounted on the top outside wall of the tubular container for supporting the bearing rotatably,
The fuel gas sampling container for combustion test according to claim 1 or 2 , characterized by comprising: The cylindrical container has an inclined end surface to which the lid is attached,
The fuel gas sampling container for combustion test according to claim 3 , wherein the support base is attached to an outer wall having the longest length in the longitudinal direction of the cylindrical container.

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