JP7141436B2 - Gas supply system, gas supply method, and gas supply program - Google Patents

Description

The present invention relates to, for example, a deposit removing device that removes deposits adhering to an object using a pressure wave generated by increasing the pressure inside the container by burning combustion gas supplied into the container. It relates to an applicable gas supply system, gas supply method, and gas supply program.

In recent years, it has become important to improve the amount of power generated in waste incineration facilities equipped with power generation facilities. To generate power at a waste incineration facility, a boiler recovers heat from the high-temperature exhaust gas generated by the combustion of waste in the incinerator, generates steam of a specified temperature and pressure, and introduces it into the turbine generator. It is done by

The boiler has a radiant chamber and a convective heat transfer chamber. A radiant heat transfer tube is arranged as a radiant heat transfer surface in the radiant chamber, and a superheater is arranged as a convective heat transfer surface in the convective heat transfer chamber. The superheater is configured by arranging a plurality of heat transfer tubes (superheating tubes) in a horizontal direction in a plurality of stages in a height direction.

Exhaust gas from an incinerator contains dust containing corrosive components and heavy metals. For this reason, as the operation progresses, dust gradually adheres and accumulates on the radiant heat transfer surface and convection heat transfer surface of the boiler. It may lead to a situation where it is difficult to continue normal operation.

Therefore, by attaching a deposit removing device that removes deposits using pressure waves to the boiler, it is possible to continue normal operation of the boiler (see, for example, Patent Document 1).

A deposit removing device according to Patent Document 1 includes a pressure container having an opening and a closing body that closes the opening. Combustion gas) is configured to generate a pressure wave.

WO2007/028264

Although Patent Document 1 discloses that the combustion gas is introduced into the pressure vessel, it does not specifically disclose the control of the supply amount of the combustion gas introduced into the pressure vessel. For this reason, in the deposit removing device according to Patent Document 1, the supply amount of the combustion gas cannot be accurately controlled, and the power of the pressure wave varies, making it difficult to accurately adjust the power of the pressure wave. There is a possibility that it will not be possible.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a gas supply system, a gas supply method, and a gas supply program capable of accurately controlling the supply amount of combustion gas. .

The characteristic configuration of the gas supply system according to the present invention for solving the above problems is as follows:
a combustion gas supply line for supplying combustion gas to the vessel;
an upstream on-off valve and a downstream on-off valve interposed respectively upstream and downstream of the gas flow in the combustion gas supply pipe;
a pressure gauge connected between the upstream on-off valve and the downstream on-off valve in the combustion gas supply line;
valve control means for controlling opening and closing of valves including the upstream on-off valve and the downstream on-off valve;
It is to prepare

According to the gas supply system of this configuration, the upstream side on-off valve and the downstream side on-off valve are interposed respectively on the upstream side and the downstream side of the gas flow in the combustion gas supply line for supplying the combustion gas to the container. , a pressure gauge is connected to the combustion gas supply line between the upstream opening/closing valve and the downstream opening/closing valve. When both the upstream on-off valve and the downstream on-off valve are open, combustion gas is supplied to the container through the combustion gas supply pipeline. In this case, both the pressure from the upstream side of the upstream opening/closing valve in the combustion gas supply line and the pressure from the container filled with the already supplied combustion gas act on the pressure gauge. Therefore, the pressure inside the container cannot be measured accurately, and the amount of combustion gas supplied cannot be accurately controlled. Therefore, the valve control means controls the opening and closing of the upstream opening/closing valve and the downstream opening/closing valve so that only the pressure from the container side acts on the pressure gauge. The pressure gauge when only the pressure from the container side is acting on the pressure gauge by controlling the opening and closing of the upstream and downstream on-off valves so that the pressure is supplied to the container via so that the measured value of is close to the target value. Thereby, the supply amount of the combustion gas can be accurately controlled.

In the gas supply system according to the present invention,
The valve control means controls the upstream opening/closing valve so that the pressure value measured by the pressure gauge when the upstream opening/closing valve is closed approaches a target value assuming that the downstream opening/closing valve is open. It is preferable that the on-off valve is opened and closed, and the downstream side on-off valve is closed when the combustion gas supplied into the container is burned.

According to the gas supply system of this configuration, the valve control means assumes that the downstream on-off valve is open, and the pressure value measured by the pressure gauge when the upstream on-off valve is closed approaches the target value. Opens and closes the upstream on-off valve. That is, when the downstream side on-off valve is open and the upstream side on-off valve is closed, the pressure from the upstream side of the upstream side on-off valve in the combustion gas supply line is such that the upstream side on-off valve is closed. As a result, only the pressure from the container side due to the opening of the downstream on-off valve acts on the pressure gauge without acting on the pressure gauge, and the pressure inside the container can be accurately measured. If the measured value in this state does not reach the target value, open the upstream on-off valve to supply combustion gas to the container, then close the upstream on-off valve and measure the pressure with the pressure gauge. , If the measured value at this time has not yet reached the target value, by repeating the operation of opening the upstream on-off valve and supplying the combustion gas to the container, the downstream on-off valve is opened, and The measured value of the pressure gauge in a state where the upstream on-off valve is closed approaches the target value. In this way, the amount of combustion gas supplied can be accurately controlled. Then, the valve control means closes the downstream opening/closing valve during combustion of the combustion gas supplied into the container. As a result, when the combustion gas is burned, even if the pressure inside the container tries to act on the pressure gauge via the combustion gas supply line, it is blocked by the closing of the downstream on-off valve. It is possible to protect the pressure gauge used for control.

In the gas supply system according to the present invention,
A sealing body is disposed to close the opening of the container, and by increasing the pressure in the container by burning the combustion gas supplied into the container, the sealing body is broken and a pressure wave is generated. The present invention is preferably applied to a deposit removing device that removes deposits adhering to an object using the pressure wave.

According to the gas supply system of this configuration, the pressure inside the container is increased by combustion of the combustion gas supplied into the container, thereby destroying the sealing body that closes the opening of the container and generating pressure waves. In the removal device, the amount of combustion gas supplied into the vessel can be precisely controlled, so the power of the pressure wave can be precisely adjusted.

In the gas supply system according to the present invention,
a gas exhaust pipe with one end open;
a gas exhaust valve interposed in the gas exhaust pipe;
further comprising
The other end side of the gas exhaust pipeline is connected between a position where the pressure gauge is connected in the combustion gas supply pipeline and a position where the downstream opening/closing valve is interposed,
It is preferable that the valve control means open the gas exhaust valve when the combustion gas supplied into the container is burned.

According to the gas supply system of this configuration, it is configured to further include a gas exhaust pipe having one end open to the atmosphere, and a gas exhaust valve interposed in the gas exhaust pipe. The other end side of the gas exhaust pipe is connected between the position where the pressure gauge is connected and the position where the downstream opening/closing valve is interposed in the combustion gas supply pipe. Then, the valve control means opens the gas exhaust valve during combustion of the combustion gas supplied into the container. As a result, when the combustion gas is burned, even if the downstream side on-off valve is closed, the pressure inside the container, which is about to act on the pressure gauge via the combustion gas supply line, cannot be prevented. , the pressure can be released via the gas exhaust line and the pressure gauge can be reliably protected.

In the gas supply system according to the present invention,
a purge gas supply line for supplying purge gas to the vicinity of the opening of the container;
a purge gas supply valve interposed in the purge gas supply pipeline;
further comprising
It is preferable that the valve control means keeps the purge gas supply valve open during combustion of the combustion gas supplied into the container.

According to the gas supply system of this configuration, the purge gas supply valve interposed in the purge gas supply pipe for supplying the purge gas to the vicinity of the opening of the container is opened when the combustion gas supplied into the container burns. state. As a result, the purge gas is supplied to the vicinity of the opening of the container through the purge gas supply line, and when the combustion gas is burned, the inside of the container is brought into a near-vacuum state due to the release of pressure waves, and is sealed. Foreign matter, such as dust, which attempts to enter the container through the opening of the container exposed to the outside due to the breakage of the stopper, is driven out by the purge gas. Therefore, foreign matter can be prevented from entering the container.

In the gas supply system according to the present invention,
It is preferable to further include pressure reducing means for reducing the pressure acting on the downstream opening/closing valve from the container through the combustion gas supply line when the combustion gas is burned.

According to the gas supply system of this configuration, the pressure acting on the downstream side on-off valve from the container through the combustion gas supply line during combustion of the combustion gas is reduced by the pressure reducing means. Cost reduction can be achieved without using an expensive on-off valve with excellent performance.

In the gas supply system according to the present invention,
The opening of the container blocked by the sealing body is determined based on the measurement result of the pressure gauge when compressed air gas is supplied to the container through the combustion gas supply pipe instead of the combustion gas. It is preferable to further include gas leakage detection means for detecting gas leakage from the part.

According to the gas supply system of this configuration, when the compressed air gas is supplied to the container through the combustion gas supply pipeline instead of the combustion gas, based on the measurement result of the pressure gauge, it is blocked by the sealing body. Gas leakage from the opening of the container is detected by the gas leakage detecting means. It can be reliably detected using inexpensive compressed air gas.

In the gas supply system according to the present invention,
Equipped with electrical ignition means for igniting the combustion gas,
It is preferable to further include an energization checking means for checking the energization state of the electrical ignition means based on the value of the current supplied to the electrical ignition means and the energization time.

According to the gas supply system of this configuration, the energization state of the electrical ignition means is checked by the energization check means based on the energization current value and the energization time of the electrical ignition means. It is possible to increase the reliability of the certainty of gas ignition.

Next, the characteristic configuration of the gas supply method according to the present invention for solving the above problems is as follows:
An upstream on-off valve and a downstream on-off valve are interposed respectively on the upstream side and the downstream side of the gas flow in the combustion gas supply pipe for supplying the combustion gas to the container, and the combustion gas supply pipe A pressure gauge is connected between the upstream on-off valve and the downstream on-off valve in
A step of opening and closing the upstream on-off valve so that the pressure value measured by the pressure gauge when the upstream on-off valve is closed approaches a target value when the downstream on-off valve is open. When,
a step of closing the downstream on-off valve during combustion of the combustion gas supplied into the container;
to include

According to the gas supply method of this configuration, assuming that the downstream on-off valve is open, the pressure value measured by the pressure gauge when the upstream on-off valve is closed approaches the target value. A process of opening and closing the on-off valve is performed. In this way, when the downstream on-off valve is open and the upstream on-off valve is closed, the pressure from the upstream side of the upstream on-off valve in the combustion gas supply line is Combustion gas is injected into the container based on the measured value of the pressure gauge when only the pressure from the container side due to the opening of the downstream on-off valve acts on the pressure gauge without acting on the pressure gauge. By introducing it, the amount of combustion gas supplied can be controlled accurately. Further, when the combustion gas supplied into the container is burned, a step of closing the downstream opening/closing valve is performed. As a result, when the combustion gas is burned, even if the pressure inside the container tries to act on the pressure gauge via the combustion gas supply line, it is blocked by the closing of the downstream on-off valve. It is possible to protect the pressure gauge used for control.

In the gas supply method according to the present invention,
It is preferable to further include an energization check step of checking the energization state of the electrical ignition means based on the current value and the energization time of the electrical ignition means for igniting the combustion gas.

According to the gas supply method of this configuration, the energization check step of checking the energization state of the electrical ignition means based on the current value and the energization time of the electrical ignition means for igniting the combustion gas is performed. , the reliability of the ignition of the combustion gas by the electrical ignition means can be enhanced.

Next, the characteristic configuration of the gas supply program according to the present invention for solving the above problems is as follows:
A gas supply program executed by a computer that controls the supply of combustion gas to the container,
An upstream on-off valve and a downstream on-off valve are interposed respectively on the upstream side and the downstream side of the gas flow in the combustion gas supply pipe for supplying the combustion gas to the container, and the combustion gas supply pipe A pressure gauge is connected between the upstream on-off valve and the downstream on-off valve in the passage,
A step of opening and closing the upstream on-off valve so that the pressure value measured by the pressure gauge when the upstream on-off valve is closed approaches a target value when the downstream on-off valve is open. When,
a step of closing the downstream on-off valve during combustion of the combustion gas supplied into the container;
is executed by the computer.

When the gas supply program of this configuration is executed by the computer, the pressure value measured by the pressure gauge when the downstream side on-off valve is open and the upstream side on-off valve is closed approaches the target value. , the upstream on-off valve is opened and closed. In this way, when the downstream on-off valve is open and the upstream on-off valve is closed, the pressure from the upstream side of the upstream on-off valve in the combustion gas supply line is Combustion gas is injected into the container based on the measured value of the pressure gauge when only the pressure from the container side due to the opening of the downstream on-off valve acts on the pressure gauge without acting on the pressure gauge. By introducing it, the amount of combustion gas supplied can be controlled accurately. Further, the downstream opening/closing valve is closed during combustion of the combustion gas supplied into the container. As a result, when the combustion gas is burned, even if the pressure inside the container tries to act on the pressure gauge via the combustion gas supply line, it is blocked by the closing of the downstream on-off valve. It is possible to protect the pressure gauge used for control.

In the gas supply program according to the present invention,
It is preferable to cause the computer to further execute a step of checking the energization state of the electrical ignition means based on the current value and the energization time of the electrical ignition means for igniting the combustion gas.

According to the gas supply program of this configuration, the computer further executes the step of checking the energized state of the electrical ignition means based on the current value and the energization time of the electrical ignition means for igniting the combustion gas. Therefore, it is possible to enhance the reliability of the ignition of the combustion gas by the electrical ignition means.

FIG. 1 is a state diagram of a boiler attached with a deposit removing device to which a gas supply system according to an embodiment of the present invention is applied. FIG. 2 is a partially broken view of the deposit removing device to which the gas supply system according to the embodiment of the present invention is applied, and is a diagram of a sealing body clamping state in which the sealing body is clamped. FIG. 3 is a partially cutaway view of the deposit removing device to which the gas supply system according to the embodiment of the present invention is applied, and is a diagram of a sealing body non-sandwiching state in which the sealing body is not sandwiched. FIG. 4 shows a sealing body, (a) is a view in the direction of arrow A in FIG. 2, and (b) is a view in the direction of arrow B in FIG. FIG. 5 is a configuration diagram of a drive control system of a deposit removing device to which a gas supply system according to an embodiment of the present invention is applied. FIG. 6 is a flow chart showing the procedure of the methane gas supply process performed in the gas supply system according to one embodiment of the present invention. FIG. 7 is a flow chart showing the procedure of the oxygen gas supply process performed in the gas supply system according to one embodiment of the present invention. FIG. 8 is a flow chart showing the procedure of the ignition process performed in the gas supply system according to one embodiment of the present invention. FIG. 9 is a flow chart showing the procedure of the sealing body supply process performed in the gas supply system according to one embodiment of the present invention. FIG. 10 is a flow chart showing the procedure of the leak check step (1) performed in the gas supply system according to one embodiment of the present invention. FIG. 11 is a flow chart showing the procedure of the leak check step (2) performed in the gas supply system according to one embodiment of the present invention. FIG. 12 is a diagram showing another embodiment of the switching mechanism. FIG. 13 is a diagram showing another embodiment of the encapsulant supply mechanism. FIG. 14 shows a flowchart showing the procedure of the plug energization check process, in which (a) is performed in parallel with the methane gas supply process, the oxygen gas supply process, the ignition process, and the leak check process (1); is performed in parallel with the exhaust process after the leak check process (2).

The present invention will be described below with reference to the drawings. In the following embodiments, as an object to which the present invention is applied, an attached matter removing device installed in a boiler installed in parallel with an incinerator of a waste incineration facility will be described as an example. However, the present invention is not intended to be limited to the embodiments described below or the configurations described in the drawings.

<Structure of deposit removal device>
FIG. 1 is a state diagram of a boiler attached with a deposit removing device to which a gas supply system according to an embodiment of the present invention is applied. As shown in FIG. 1 , the deposit removing device 10A is arranged outside the side wall 3 forming the exhaust gas flow path 2 of the boiler 1 . In the flue gas flow path 2 of the boiler 1, a plurality of heat transfer tube groups 5 and 6 are arranged in which a plurality of heat transfer tubes 4 arranged in the horizontal direction are provided in a plurality of stages in the vertical direction of the boiler 1 (Fig. 1 shows only two groups of heat transfer tubes). The heat transfer tubes 4 constituting the heat transfer tube groups 5 and 6 are objects to which deposits (dust) adhere. A space of a predetermined size is provided between the upper heat transfer tube group 5 and the lower heat transfer tube group 6, and a connecting duct 7 is protruded from the side wall 3 in communication with this space. The deposit removing device 10A is attached to the connection duct 7 via the nozzle body 8 . The deposit removing device 10A includes a container 11, a lid 12, a switching mechanism 13, and a sealing body supply mechanism 15. As shown in FIG.

FIG. 2 is a partially broken view of the deposit removing device to which the gas supply system according to the embodiment of the present invention is applied, and is a diagram of a sealing body clamping state in which the sealing body is clamped. FIG. 3 is a partially cutaway view of the deposit removing device to which the gas supply system according to the embodiment of the present invention is applied, and is a diagram of a sealing body non-sandwiching state in which the sealing body is not sandwiched. 2 and 3, the left connecting plate 36 shown in FIG. 1 is omitted for the convenience of clearly showing the internal structure of the casing 31, which will be described later.

<Container>
As shown in FIG. 2, when the direction toward the side wall 3 (see FIG. 1) is defined as "forward", the containers 11 are arranged in this order toward the rear (direction from left to right in FIG. 2). It has a small-diameter cylindrical portion 11a, a frusto-conical cylindrical portion 11b, and a large-diameter cylindrical portion 11c. These cylindrical portions 11a, 11b, and 11c are integrally connected with their axes (tube axes) aligned with each other. Here, the rear end side of the large-diameter cylindrical portion 11c is closed by the end wall portion 20. As shown in FIG. On the other hand, the front end side of the small-diameter cylindrical portion 11a is formed with an opening portion 21 having a circular hole shape. A container-side flange portion 22 is formed at the front end portion of the small-diameter cylindrical portion 11 a so as to project outward so as to include the opening portion 21 . An O-ring 23 is mounted in an O-ring groove formed to annularly surround the opening 21 on the front surface of the container-side flange portion 22 . In the following description, unless otherwise specified, the tube axis direction is the direction in which the axis (tube axis) of the container 11 extends.

<Lid body>
The lid 12 is provided corresponding to the opening 21 of the container 11 , and is arranged on the front side of the container-side flange 22 so as to face the container-side flange 22 . The lid body 12 is composed of a rectangular plate member having a plate surface large enough to cover the entire container-side flange portion 22 .

<Injection port>
The lid 12 has one injection port 25 leading into the container 11 . The injection port 25 is formed in the shape of a circular hole penetrating through the lid 12 and having a circular cross section. The opening area of the injection port 25 is substantially the same as that of the opening 21 of the container 11, and is arranged so as to match the opening 21 when projected in the tube axis direction.

<Switching mechanism>
As shown in FIG. 2, the switching mechanism 13 includes a casing 31, a hydraulic cylinder 32, and biasing means 33. As shown in FIG.

[casing]
The casing 31 comprises main frame members 35 and connecting plates 36 . The main frame member 35 is composed of a rectangular plate member having an opening (not shown) through which the small-diameter cylindrical portion 11a of the container 11 can pass. The main frame member 35 is arranged to face the lid 12 with the plate surface facing in the front-rear direction with a predetermined gap in the pipe axis direction from the lid 12 . Connecting plates 36 on both left and right sides connect the left and right sides of the lid body 12 and the main frame member 35 toward the front.

A sealing body 60 unrolled from a wound body 61, which will be described later, passes through a region between the lid body 12 and the container-side flange portion 22 in the casing 31 with the plate surface facing the pipe axis direction, and extends in the pipe axis direction. It can be sent out vertically downward, which is a direction that intersects (perpendicularly) with.

A support member 39 is fixed to the lower surfaces of the lid 12 , the main frame member 35 and the connecting plate 36 so as to be positioned below the container 11 and extend in the direction of the tube axis. The container 11 is supported by the support member 39 so as to be movable in the pipe axis direction via a guide roller 40 which is rotatably attached to the support member 39 .

[Hydraulic cylinder]
The hydraulic cylinder 32 is a fluid actuator that relatively moves the container-side flange portion 22 closer to the lid 12 . In the case of this embodiment, the extension operation of the hydraulic cylinder 32 causes the container-side flange portion 22 to relatively move toward the lid body 12 .

A plurality of (four in this example) hydraulic cylinders 32 are provided. The plurality of hydraulic cylinders 32 are fixedly attached to the main frame member 35 . The plurality of hydraulic cylinders 32 are arranged at equal angles (every 90°) around the tube axis of the container 11 . Specifically, when viewed from the front side of the main frame member 35, the XY orthogonal axis is set so that the origin O coincides with the tube axis of the container 11, and the positive direction of the X axis is the reference (0 °), and the counterclockwise rotation around the origin O is defined as the positive rotation direction, the hydraulic cylinders 32 are arranged at positions of 45°, 135°, 225° and 315°. 2 and 3, only the hydraulic cylinders 32 arranged at positions of 45° and 315° when viewed from the front side of the main frame member 35 are shown for convenience of explanation.

The hydraulic cylinder 32 is a single-acting single-rod cylinder. A pressing member 41 having a hemispherical tip is attached to the tip of the cylinder rod of the hydraulic cylinder 32 . The tip of the pressing member 41 is in contact with the rear surface of the container-side flange portion 22 . In the hydraulic cylinder 32 , the piston (not shown) is returned by the urging force of a compression coil spring (not shown) incorporated in the hydraulic cylinder 32 or the urging force of the urging means 33 . In addition, it is preferable to replaceably arrange a contact plate (not shown) on the rear surface side of the container-side flange portion 22 with which the tip of the pressing member 41 contacts. By doing so, it is possible to prevent the container-side flange portion 22 from being locally depressed by the pressing force acting from the pressing member 41 , and protect the container-side flange portion 22 from the pressing member 41 .

[guidance means]
As described above, the expansion operation of the hydraulic cylinder 32 causes the container-side flange portion 22 to relatively move in the pipe axial direction so as to approach the lid body 12 . Further, the container-side flange portion 22 is relatively moved in the pipe axial direction away from the lid body 12 by the biasing force of the compression coil spring incorporated in the hydraulic cylinder 32 and the biasing force of the biasing means 33 . A guide means 45 is provided in order to ensure that such relative movement of the container-side flange portion 22 with respect to the lid body 12 is performed accurately and smoothly. The guide means 45 is composed of a guide pin 46 and a guide bush 47 .

A plurality of (two in this example) guide pins 46 are provided. A plurality of guide pins 46 pass through the container-side flange portion 22 and are arranged between the lid 12 and the main frame member 35 so that the axis of each guide pin 46 is parallel to the tube axis of the container 11. and fixed to the lid 12 and the main frame member 35 by fasteners such as bolts (not shown). The plurality of guide pins 46 are arranged at equal angles (every 180°) around the tube axis of the container 11 . Specifically, when viewed from the front side of the lid 12, the XY orthogonal axis is set so that the origin O coincides with the tube axis of the container 11, and the positive direction of the X axis is the reference (0° ), the guide pins 46 are arranged at positions of 90° and 270° when the counterclockwise rotation around the origin O is defined as the positive rotation direction. In FIGS. 2 and 3, for the convenience of showing the guide pins 46 and other parts in the drawings so that they can be identified, the guide pins 46 are actually positioned at 90° and 270° when viewed from the front side of the lid body 12, respectively. , 67.5° and 292.5° when viewed from the front side of the lid 12 .

A plurality of guide bushes 47 (two in this example) are provided so as to correspond to the plurality of guide pins 46 . The plurality of guide bushes 47 are press-fitted into mounting holes provided in the container-side flange portion 22 and fixed to the container-side flange portion 22 . The plurality of guide bushes 47 are arranged at equal angles (every 180°) around the tube axis of the container 11 . Specifically, when viewed from the front side of the container-side flange portion 22, the XY orthogonal axis is set so that the origin O coincides with the tube axis of the container 11, and the positive direction of the X axis is the reference ( 0°), and the counterclockwise rotation around the origin O is defined as the positive rotation direction, the guide bushes 47 are arranged at positions of 90° and 270°. In FIGS. 2 and 3, for the convenience of showing the guide bush 47 and other parts in the drawings so that they can be identified, the guide bush 47 is actually positioned at 90° and 270° when viewed from the front side of the lid body 12. , 67.5° and 292.5° when viewed from the front side of the lid 12 .

In the guide means 45 , a guide pin 46 arranged between the lid 12 and the main frame member 35 is slidably inserted into a guide bush 47 . As a result, the guide bush 47 slides along the guide pin 46 when the container-side flange portion 22 moves relative to the lid 12 in the pipe axial direction. Thus, the container-side flange portion 22 is guided by the guide means 45 when the container-side flange portion 22 moves relative to the lid 12 .

[Forcing Means]
The biasing means 33 comprises a tension rod 51 , a compression coil spring 52 , a washer 53 , a first nut 54 and a second nut 55 .

A plurality of (two in this example) pull rods 51 are provided. The plurality of pull rods 51 are fixed to the container-side flange portion 22 so as to protrude toward the rear surface side of the container-side flange portion 22 with the axis of each pull rod 51 parallel to the pipe axis of the container 11 . is set. The plurality of pulling rods 51 are arranged at equal angles (every 180°) around the tube axis of the container 11 . Specifically, when viewed from the front side of the container-side flange portion 22, the XY orthogonal axis is set so that the origin O coincides with the tube axis of the container 11, and the positive direction of the X axis is the reference ( 0°), and the counterclockwise rotation about the origin O is defined as the positive rotation direction, the pull rods 51 are arranged at the respective positions of 0° and 180°. In FIGS. 2 and 3, for the convenience of clearly showing the pull rod 51 and other parts on the drawings, the pull rod 51 is actually positioned at 0° and 180° when viewed from the front side of the lid 12. , are shifted to positions of 90° and 270° when viewed from the front side of the lid body 12 .

The tension rod 51 protruding to the rear side of the container-side flange portion 22 passes through the main frame member 35 and further protrudes to the rear side of the main frame member 35 . A compression coil spring 52 and a washer 53 arranged in this order toward the rear of the main frame member 35 are fitted onto the portion of the tension rod 51 projecting to the rear side of the main frame member 35 . A male screw portion 51a is formed in a required area from the rear end of the pull rod 51 toward the tip of the pull rod 51 projecting to the rear surface side of the main frame member 35 . A first nut 54 and a second nut 55 arranged rearward in this order are screwed into the male screw portion 51a.

The compression coil spring 52 has its front end in contact with the rear surface of the main frame member 35 and its rear end in contact with the washer 53 . A first nut 54 is in contact with the washer 53, and the initial deflection amount of the compression coil spring 52 can be adjusted by tightening or loosening the first nut 54. . After the initial deflection amount of the compression coil spring 52 is adjusted by operating the first nut 54, the second nut 55 is tightened while being in contact with the first nut 54, and then the first nut 54 is reversely rotated in the loosening direction. As a result, the tightened state of the first nut 54 is maintained by the double nut effect.

In the biasing means 33 , the elastic force of the compression coil spring 52 is transmitted to the tension rod 51 via the washer 53 and the nuts 54 and 55 . In this manner, the biasing means 33 biases the container-side flange portion 22 in a direction (rearward) in which the container-side flange portion 22 is pulled away from the lid body 12 .

<Encapsulation body supply mechanism>
The sealing body supply mechanism 15 supplies the sealing body 60 having a sufficient width to close the opening 21 of the container 11 and to close the injection port 25 provided in the lid 12, A winding body 61 , a delivery drum 62 and a collection mechanism 63 are provided.

<Encapsulation body>
The sealing body 60 is made of, for example, a plate-like body formed by forming a long strip of spring steel such as stainless steel, iron, or copper, a metal material such as aluminum, or a resin material. By configuring the sealing body 60 in a strip shape in this manner, the length of the device in the plate thickness direction of the sealing body 60 can be shortened, and the switching mechanism 13 and the sealing body supply mechanism 15 can be made compact. As a result, it is possible to reduce the overall size of the deposit removing apparatus 10A.

[Wound body]
The wound body 61 is formed by winding the strip-shaped sealing body 60 into a roll, and is attached to a delivery drum 62 arranged above the container 11 .

[Feeding drum]
The delivery drum 62 is rotatably attached to a device frame (not shown) via a support shaft 64 having axes perpendicular to each other when projected onto a plane including the tube axis of the container 11 . Here, the sealing body 60 unrolled from the wound body 61 has its plate surface oriented in the tube axial direction of the container 11 and closes the opening 21 and the injection port 25 in a direction intersecting (perpendicular to) the tube axial direction. The mounting position and the like of the delivery drum 62 with respect to the device frame (not shown) are determined so as to advance along the feed line extending vertically downward.

[Recovery Mechanism]
The collection mechanism 63 includes a winding drum 65 , a winding motor 66 , guide rollers 67 and feed amount detection means 68 .

The take-up drum 65 is disposed below the container 11 so as to be symmetrical to the delivery drum 62 with respect to the tube axis (axis) of the container 11 . The winding drum 65 is rotatably attached to a device frame (not shown) via a support shaft 69 having an axis perpendicular to the plane when projected onto a plane including the tube axis (axis) of the container 11. Around the winding drum 65 , the tip side of the sealing member 60 that has been delivered from the delivery drum 62 and has passed between the lid member 12 and the container-side flange portion 22 is wound around the winding drum 65 .

A winding motor 66 is attached to the winding drum 65 so as to transmit rotational power to the support shaft 69 . The winding motor 66 is operated so that the sealing body 60 fed out from the feeding drum 62 is wound up by the winding drum 65 .

The guide rollers 67 are arranged at key points along the feed line from the feeding drum 62 to the lid body 12 and the container-side flange portion 22 and to the winding drum 65 . It guides the sealing body 60 wound on the winding drum 65 .

FIG. 4 shows a sealing body, (a) is a view in the direction of arrow A in FIG. 2, and (b) is a view in the direction of arrow B in FIG. As the feeding amount detection means 68 shown in FIG. 2, for example, a laser sensor or the like capable of detecting the broken portion (round hole 60b: see FIG. 4B) of the sealing body 60 by the reflected light of the irradiated laser beam is used. mentioned. The control device 160, which will be described later, calculates the feed amount of the sealing body 60 based on the detection result of the feed amount detection means 68, and controls the rotation of the winding motor 66 based on the calculated feed amount.

In the sealed body supply mechanism 15, the rotation of the winding motor 66 is controlled by the control device 160, which will be described later, based on the detection result of the feeding amount detection means 68 when the switching mechanism 13 is in the sealed body non-sandwiching state, which will be described later. By doing so, instead of the broken portion (round hole 60b: see FIG. 4(b)) of the sealing body 60, the unbroken portion 60a (see FIG. 4(a)) opens the opening 21 of the container 11. And the sealing body 60 can be supplied so as to close the injection port 25 of the lid 12 .

As shown in FIG. 2 , a glow plug 71 is attached to the end wall portion 20 of the container 11 via a plug protection member 70 . In such a configuration, the mixed gas inside the container 11 can be ignited by energizing the glow plug 71 . Moreover, most of the pressure waves generated by the combustion and explosion of the mixed gas are blocked by the plug protection member 70, so that the glow plugs 71 can be protected and the life of the glow plugs 71 can be greatly extended.

<Nozzle body>
The nozzle body 8 has a small-diameter cylindrical part 8a which is opened to correspond to the opening part 21 of the container 11 through an injection port part 25 provided in the lid body 12, and an inverted truncated part whose diameter gradually increases toward the front. It has a conical cylindrical portion 8b and a large-diameter cylindrical portion 8c having a diameter larger than that of the small-diameter cylindrical portion 8a. The small-diameter cylindrical portion 8a, the inverted truncated conical cylindrical portion 8b, and the large-diameter cylindrical portion 8c are integrally connected forward in this order.

In the nozzle body 8 , the large-diameter cylindrical portion 8 c and the inverted truncated conical cylindrical portion 8 b are inserted inside the connection duct 7 . In the middle portion of the nozzle body 8, a flange integrally provided at the front end of the small-diameter cylindrical portion 8a is fastened to a flange integrally provided at the rear end of the body portion 77 of the connection duct 7 with required bolts. It is fixed to the connection duct 7 by being attached. The rear end of the nozzle body 8 is fixed to the lid body 12 by fastening a flange integrally provided on the rear end portion of the small-diameter cylindrical portion 8a to the lid body 12 with required bolts.

One end of a blow-out pipe 76 is joined to the small-diameter cylindrical portion 8a at an intermediate portion between the front end and the rear end of the small-diameter cylindrical portion 8a in the nozzle body 8 so as to communicate with the inside of the small-diameter cylindrical portion 8a. . The blowout pipe 76 is composed of a cylindrical member extending in an axial direction orthogonal to the pipe axis of the small-diameter cylindrical portion 8a.

One end of an exhaust pipe 78 is joined to the connection duct 7 in a state of communication with the inside of the connection duct 7 at a portion near the flange integrally provided at the rear end of the main body portion 77 of the connection duct 7 . . The exhaust pipe 78 is composed of a cylindrical member extending in an axial direction orthogonal to the pipe axis of the connection duct 7 .

FIG. 5 is a configuration diagram of a drive control system of a deposit removing device to which a gas supply system according to an embodiment of the present invention is applied.

<Hydraulic drive means>
As shown in FIG. 5, the hydraulic drive means 80 for driving the switching mechanism 13 by the hydraulic cylinder 32 includes an air-hydro booster (hereinafter simply referred to as "booster") 81 and a direction control valve 82. .

[booster]
The booster 81 includes a booster body 85 and a piston body 86 built in the booster body 85 . The piston body 86 is formed by connecting a large-diameter piston 87 and a small-diameter piston 88 with a connecting rod 89 . A drive chamber 90 is defined in the booster body 85 between the closed end on one side (right side in FIG. 5) of the booster body 85 and the large-diameter piston 87 . A return spring 91 is arranged in a compartment between the large-diameter piston 87 , the small-diameter piston 88 and the booster main body 85 . A pressure increasing chamber 92 is defined between the closed end on the other side (left side in FIG. 5) of the booster body 85 and the small-diameter piston 88 . The pressurizing chamber 92 is filled with hydraulic oil. The pressure increasing chamber 92 and the hydraulic cylinder 32 are connected by a hydraulic line 93 .

[Direction control valve]
The directional control valve 82 is, for example, a 5-port 2-position electromagnetically operated directional control valve having a first inlet/outlet port, a second inlet/outlet port, a first exhaust port, a second exhaust port, and a compressed air introduction port. A first inlet/outlet port of the directional control valve 82 and the drive chamber 90 are connected by an air pipe 94 . A first exhaust port of the directional control valve 82 is connected to a silencer 96 via an air line 95 . A second exhaust port of the directional control valve 82 is connected to a silencer 98 via an air line 97 . A compressed air introduction port of the directional control valve 82 is connected to a compressed air gas supply source 100 via an air line 99 .

The switching mechanism 13 is provided with a shutter device 110 that closes the injection port 25 of the lid 12 when the sealing body is not sandwiched as shown in FIG. For convenience of explanation, the shutter device 110 is shown only in FIG.

As shown in FIG. 5, the shutter device 110 includes a shielding plate 111 having a plate surface portion large enough to block the injection port portion 25 (see FIG. 3) of the lid 12, and driving the shielding plate 111 up and down. An air cylinder 112 and a directional control valve 113 for switching the expansion and contraction of the air cylinder 112 are provided.

The directional control valve 113 is, for example, a 5-port 2-position switching electromagnetically operated directional control valve having a first inlet/outlet port, a second inlet/outlet port, a first exhaust port, a second exhaust port, and a compressed air introduction port. The first inlet/outlet port of the directional control valve 113 and the head-side chamber of the air cylinder 112 are connected by an air pipeline 114 . The second inlet/outlet port of the directional control valve 113 and the bottom side chamber of the air cylinder 112 are connected by an air pipeline 115 . A first exhaust port of the directional control valve 113 is connected to a silencer 117 via an air line 116 . A second exhaust port of the directional control valve 113 is connected to a silencer 119 via an air line 118 . A compressed air introduction port of the directional control valve 113 is connected to a compressed air gas supply source 121 via an air pipeline 120 .

<Gas supply system>
Next, a gas supply system for supplying combustion gas such as combustible gas and oxidant gas required for combustion to container 11 of deposit removing apparatus 10A will be described in detail with reference to FIG.

One end of a main supply pipeline 130 is connected to the end wall portion 20 of the container 11 . One end sides of each of the first branch line 131 , the second branch line 132 , and the third branch line 133 are connected to the other end side of the main supply line 130 . A combustible gas supply source (methane gas supply source) 135 is connected to the other end of the first branch pipeline 131 . An oxidant gas supply source (oxygen gas supply source) 136 is connected to the other end of the second branch pipe 132 . A compressed air gas supply source 137 is connected to the other end of the third branch pipeline 133 . Here, as the combustible gas supply source 135, for example, a high-pressure combustible gas cylinder in which a combustible gas is enclosed at a high pressure (for example, 14.7 MPa) in a pressure container is exemplified. Examples of combustible gas include methane gas and hydrogen gas (methane gas in this example). Moreover, as the oxidant gas supply source 136, for example, a high-pressure oxidant gas cylinder formed by sealing the oxidant gas at a high pressure (for example, 14.7 MPa) in a pressure-resistant container can be used. Examples of the oxidant gas include oxygen gas and air (oxygen gas in this example). An example of the compressed air gas supply source 137 is an air tank attached to an air compressor. The gas from each gas supply source 135, 136, 137 is pressure-reduced to, for example, 0.9 MPa by a regulator (not shown) and supplied downstream.

<Methane gas supply line, oxygen gas supply line, leak check gas supply line>
In FIG. 5, the methane gas supply pipeline 141 is a pipeline for supplying methane gas from the methane gas supply source 135 to the container 11, and is composed of the main supply pipeline 130 and the first branch pipeline 131. . The oxygen gas supply line 142 is a line for supplying oxygen gas from the oxygen gas supply source 136 to the container 11 and is composed of the main supply line 130 and the second branch line 132 . The leak check gas supply line 143 is a line for supplying compressed air gas (leak check gas) from the compressed air gas supply source 137 to the container 11, and is connected to the main supply line 130 and the third branch line 133. It is composed of Methane gas and oxygen gas are combustion gases necessary for combustion. Acts as a supply line.

<Gas main block valve, methane gas supply valve, oxygen gas supply valve>
A gas main shutoff valve 150 for opening and closing the main supply pipeline 130 is interposed in the middle of the main supply pipeline 130 . A methane gas supply valve 151 for opening and closing the first branch pipeline 131 is interposed in the middle of the first branch pipeline 131 . An oxygen gas supply valve 152 for opening and closing the second branch pipeline 132 is interposed in the middle of the second branch pipeline 132 . A leak check valve 153 for opening and closing the third branch pipeline 133 is interposed in the middle of the third branch pipeline 133 .

<Pressure gauge>
A pressure gauge 145 for gas supply control is connected between the methane gas supply valve 151 and the gas main stop valve 150 in the methane gas supply line 141 . In addition, the pressure gauge 145 is connected between the oxygen gas supply valve 152 and the main gas shutoff valve 150 in the oxygen gas supply line 142 , and is connected between the leak check valve 153 and the gas main stop valve 150 in the leak check gas supply line 143 . It is connected between block valve 150 .

<Decompression means>
A part of the pipe on one end side of the main supply pipe 130 is composed of a spiral thin tube 138 formed by spirally winding a thin tube having an internal flow area smaller than that of the other part of the pipe. It is The helical thin tube 138 functions as pressure reducing means for reducing the pressure acting on the gas main shutoff valve 150 from the container 11 via the main supply line 130 when the combustion gas (mixed gas of methane gas and oxygen gas) is burned. In this way, by intentionally providing the spiral capillary tube 138 with a large pressure loss in a part of the main supply pipeline 130, the pressure on the downstream side of the spiral capillary tube 138 in the main supply pipeline 130 is lowered. As a result, the pressure acting on the main gas shutoff valve 150 from the container 11 through the main supply pipe line 130 during combustion of the combustion gas is reduced by the spiral thin tube 138, so that the main gas shutoff valve 150 has a high pressure resistance performance. Cost reduction can be achieved without using an expensive valve with superior performance. In addition, since the spiral tube 138 is spirally formed, the spiral tube 138 can absorb displacement of the main supply pipeline 130 in the longitudinal direction when the container 11 moves in the axial direction. .

<Gas exhaust pipe, gas exhaust valve>
Gas supply lines 141 , 142 , 143 of methane gas supply line 141 , oxygen gas supply line 142 , and leak check gas supply line 143 are connected to exhaust pipe 78 by gas exhaust pipe 155 . One end side of the gas exhaust pipe 155 is open to the exhaust gas flow path 2 of the boiler 1 via the exhaust pipe 78 and the connection duct 7 . The other end side of the gas exhaust pipe 155 is connected between the position where the pressure gauge 145 is connected and the position where the gas main shutoff valve 150 is interposed in the gas supply pipes 141, 142, 143. . A gas exhaust valve 156 for opening and closing the gas exhaust pipe 155 is interposed in the middle of the gas exhaust pipe 155 .

<Purge gas supply line, purge gas supply valve>
The blowout pipe 76 and the compressed air gas supply source 157 are connected by a purge gas supply line 158 . A purge gas supply valve 159 for opening and closing the purge gas supply line 158 is interposed in the middle of the purge gas supply line 158 .

<Gas Leak Detection Means>
In this embodiment, the configuration including the leak check gas supply line 143, the leak check valve 153, the pressure gauge 145, and the control device 160, which will be described later, corresponds to the "gas leak detection means" in the present invention, and the combustion gas (methane gas, Oxygen gas), compressed air gas is supplied to the container 11 through the leak check gas supply line 143 as the leak check gas. A control device 160 detects gas leakage from the opening 21 of the container 11 .

<Control device>
In FIG. 5, the control device 160 is composed mainly of a microcomputer, reads a predetermined program including a gas supply program created according to the algorithms shown in the flow charts of FIGS. By reading the measured value and executing a predetermined program, the opening and closing of various valves 82, 113, 150, 151 to 153, 156, 159 and the valve opening are controlled, and the energization to the glow plug 71 is controlled. do.

<Energization check means>
In this embodiment, an ammeter 170 is provided to measure the current flowing through the glow plug 71 controlled by the control device 160 . The control device 160 checks the energization state of the glow plug 71 based on the energization current value and the energization time of the glow plug 71 . In this embodiment, the configuration including the ammeter 170 and the control device 160 corresponds to the "energization check means" in the present invention.

In the deposit removing apparatus 10A configured as described above, the sealing member 60 is positioned between the lid member 12 and the container-side flange portion 22 when performing the methane gas supply step described later. , the predetermined operation of the directional control valve 82 switches the valve position of the directional control valve 82 to the first position 82a as shown in FIG. Such a switching operation of the direction control valve 82 is performed by transmitting a signal for switching the valve position of the direction control valve 82 to the first position 82a from the control device 160 to the operating portion of the direction control valve 82. FIG. When the directional control valve 82 is switched to the first position 82a, compressed air from the compressed air gas supply 100 is supplied to the drive chamber 90 via the air line 99, the directional control valve 82 and the air line 94. . As a result, the piston body 86 is moved leftward in FIG. 5, and the working oil in the pressure increasing chamber 92 is compressed. The pressure of the hydraulic fluid in the pressure increasing chamber 92 is increased according to the area ratio of the large diameter piston 87 and the small diameter piston 88 . The hydraulic oil (pressure oil) with increased pressure is supplied to the hydraulic cylinder 32 via the hydraulic line 93 , and the hydraulic cylinder 32 is operated to extend, so that the container-side flange portion 22 moves forward so as to approach the lid body 12 . and moved. Along with this, the container 11 is moved forward along the tube axis.

As shown in FIG. 2, since the container 11 is supported by the support member 39 via the guide rollers 40, the forward movement of the container 11 is smoothly performed. When the container-side flange portion 22 is moved forward, the sealing member 60 positioned between the lid body 12 and the container-side flange portion 22 is sandwiched between the container-side flange portion 22 and the lid body 12 . (This state is hereinafter referred to as a “sealing body sandwiched state”). In this sealing body clamping state, the sealing effect of the O-ring 23 keeps the container-side flange portion 22 and the sealing body 60 in an airtight state. Therefore, as will be described later, the injection port 25 of the lid 12 and the opening 21 of the container must be reliably closed by the sealing member 60 until the sealing member 60 is destroyed by increasing the pressure inside the container 11 . Therefore, a desired pressure wave can be reliably generated.

Further, when the container-side flange portion 22 is moved forward, the pull rod 51 is also moved forward together with the container-side flange portion 22 . Along with this, the compression coil spring 52 is compressed in accordance with the movement of the tension rod 51 , and an elastic repulsive force corresponding to the amount of compression is accumulated in the biasing means 33 .

[Methane gas supply process]
FIG. 6 is a flow chart showing the procedure of the methane gas supply process performed in the gas supply system according to one embodiment of the present invention. The symbol "S" in the figure represents a step (the same applies to FIGS. 7 to 11 and 14).

<Steps S1 to S2>
The controller 160 shown in FIG. 5 transmits a valve open signal to each of the main gas shutoff valve 150 and the methane gas supply valve 151 (S1-S2). As a result, the main gas block valve 150 and the methane gas supply valve 151 are opened, and methane gas is supplied from the methane gas supply source 135 to the container 11 through the methane gas supply line 141 .

<Steps S3 to S4>
The control device 160 transmits a valve closing signal to the methane gas supply valve 151 after a predetermined time has passed (S3-S4). Thereby, the methane gas supply valve 151 is closed. Thus, when the main gas shutoff valve 150 is open and the methane gas supply valve 151 is closed, the pressure from the upstream side of the methane gas supply valve 151 in the methane gas supply line 141 is Since the main gas check valve 150 is open, only the pressure from the container 11 side acts on the pressure gauge 145 without acting on the pressure gauge 145 due to the closing, and the pressure inside the container 11 is reduced. It becomes possible to measure accurately.

<Step S6>
The control device 160 determines whether the pressure inside the container 11 is equal to or higher than a target value (for example, 0.2 MPa) based on the measured value of the pressure gauge 145 (S6). If the pressure inside the container 11 is equal to or higher than the target value ("YES" in step S6), the process proceeds to step S7. If the pressure inside the container 11 is less than the target value ("NO" in step S6), the process proceeds to step S9.

<Steps S7 to S8>
In step S7, the control device 160 determines that the pressure in the container 11 is equal to or lower than the upper limit value (for example, 0.22 MPa, which is 1.1 times the target value (0.2 MPa)) based on the measured value of the pressure gauge 145. or not. If the pressure in the container 11 is equal to or lower than the upper limit value ("YES" in step S7), the flow proceeds to the oxygen gas supply step (see FIG. 7). If the pressure in container 11 exceeds the upper limit ("NO" in step S7), control device 160 causes alarm device 161 to issue a signal to issue an abnormal alarm to the effect that the pressure in container 11 exceeds the upper limit. and to the display 162 (S8). As a result, the alarm device 161 emits an alarm sound indicating that the pressure in the container 11 exceeds the upper limit, and a screen indicating that the pressure in the container 11 exceeds the upper limit is displayed. Characters and the like are displayed on the display 162 .

<Steps S9 to S14>
In step S9, the control device 160 determines whether or not the number of times (n) of filling with methane gas is equal to or less than the upper limit of filling times (N) (S9). If the methane gas filling frequency (n) is equal to or less than the filling frequency upper limit value (N) ("YES" in step S9), the controller 160 increments the methane gas filling frequency (n) by 1 (n+1→n) (S10). , a valve open signal is transmitted to the methane gas supply valve 151 (S11), a valve close signal is transmitted to the methane gas supply valve 151 after a predetermined time has passed (S12 to S13), and after a predetermined time has passed, the process returns to step S6 ( S14), it is determined whether or not the pressure in the container 11 is equal to or higher than a target value (for example, 0.2 MPa) (S6). When the methane gas filling frequency (n) exceeds the filling frequency upper limit (N) ("NO" in step S9), the methane gas filling frequency (n) exceeds the filling frequency upper limit (N). A signal for issuing an abnormal alarm to that effect is transmitted to the alarm device 161 and the display device 162 (S15). As a result, the alarm device 161 emits a warning sound indicating that the methane gas filling times (n) exceeds the filling times upper limit (N), and the methane gas filling times (n) exceeds the filling times upper limit (N). ) is displayed on the display 162 to indicate the abnormality.

In this embodiment, the processes of steps S9 to S14 are repeatedly executed based on the judgment in step S6 within the range of the number of filling times (n) of methane gas filling times (N). That is, in step S6, if the measured value of the pressure gauge 145 is not equal to or greater than the target value, the methane gas supply valve 151 is opened to supply methane gas to the container 11, and then the methane gas supply valve 151 is closed, and the pressure gauge 145 The pressure is measured, and if the measured value at this time is still not equal to or greater than the target value, the operation of opening the methane gas supply valve 151 and supplying methane gas to the container 11 is repeated. As a result, the actual pressure inside the container 11 in a state where the main gas shutoff valve 150 is open and the methane gas supply valve 151 is closed, that is, only the pressure inside the container 11 acts on the pressure gauge 145 . The pressure value is greater than or equal to the target value.

If the actual pressure value in the container 11 is equal to or higher than the target value ("YES" in step S6) and the actual pressure value in the container 11 is equal to or lower than the upper limit value ("YES" in step S7), that is, the container 11 If the actual pressure value inside is close to the target value, the methane gas supply step is followed by the oxygen gas supply step.

[Oxygen gas supply step]
FIG. 7 is a flow chart showing the procedure of the oxygen gas supply process performed in the gas supply system according to one embodiment of the present invention.

<Step S22>
The control device 160 shown in FIG. 5 transmits a valve open signal to the oxygen gas supply valve 152 (S22). As a result, the oxygen gas supply valve 152 is opened, and oxygen gas is supplied from the oxygen gas supply source 136 to the container 11 through the oxygen gas supply line 142 .

<Steps S23 to S24>
The control device 160 transmits a valve closing signal to the oxygen gas supply valve 152 after a predetermined time has elapsed (S23-S24). Thereby, the oxygen gas supply valve 152 is closed. Thus, when the main gas shutoff valve 150 is open and the oxygen gas supply valve 152 is closed, the pressure from the upstream side of the oxygen gas supply valve 152 in the oxygen gas supply line 142 is Since the supply valve 152 is closed, the pressure gauge 145 is not affected, and only the pressure from the container 11 side due to the opening of the gas main shutoff valve 150 acts on the pressure gauge 145 . It becomes possible to accurately measure the internal pressure.

<Step S26>
The control device 160 determines whether the pressure inside the container 11 is equal to or higher than a target value (for example, 0.6 MPa) based on the measured value of the pressure gauge 145 (S26). If the pressure inside the container 11 is equal to or higher than the target value ("YES" in step S26), the process proceeds to step S27. If the pressure inside the container 11 is less than the target value ("NO" in step S26), the process proceeds to step S29.

<Steps S27-S28>
In step S27, the control device 160 determines that the pressure in the container 11 is equal to or lower than the upper limit value (for example, 0.66 MPa, which is 1.1 times the target value (0.6 MPa)) based on the measured value of the pressure gauge 145. or not. If the pressure in the container 11 is equal to or lower than the upper limit ("YES" in step S27), the oxygen gas supply step is terminated. If the pressure in container 11 exceeds the upper limit ("NO" in step S27), control device 160 causes alarm device 161 to issue a signal to issue an abnormal alarm to the effect that the pressure in container 11 exceeds the upper limit. and to the display 162 (S28). As a result, the alarm device 161 emits an alarm sound indicating that the pressure in the container 11 exceeds the upper limit, and a screen indicating that the pressure in the container 11 exceeds the upper limit is displayed. Characters and the like are displayed on the display 162 .

<Steps S29 to S34>
In step S29, the control device 160 determines whether or not the number of times (n) of filling with oxygen gas is equal to or less than the upper limit of filling times (N) (S29). If the oxygen gas filling frequency (n) is equal to or less than the filling frequency upper limit (N) ("YES" in step S29), the controller 160 increments the oxygen gas filling frequency (n) by 1 (n+1→n) ( S30), a valve open signal is sent to the oxygen gas supply valve 152 (S31), a valve close signal is sent to the oxygen gas supply valve 152 after a predetermined time has passed (S32-S33), and after a predetermined time has passed step S26. (S34), and it is determined whether or not the pressure in the container 11 is equal to or higher than a target value (for example, 0.6 MPa) (S26). When the oxygen gas filling frequency (n) exceeds the filling frequency upper limit (N) ("NO" in step S29), the controller 160 controls the oxygen gas filling frequency (n) to exceed the filling frequency upper limit (N). ) to the alarm device 161 and the display device 162 (S35). As a result, the alarm device 161 emits a warning sound indicating that the number of filling times of oxygen gas (n) exceeds the upper limit of filling times (N), and the number of filling times of methane gas (n) exceeds the upper limit of filling times (N). N) is displayed on the display 162 to indicate an abnormality such as a screen or characters.

In this embodiment, the processing of steps S29 to S34 is repeatedly executed based on the judgment in step S26 within the range of the number of filling times (n) of oxygen gas filling times (N). That is, in step S26, if the measured value of the pressure gauge 145 is not equal to or greater than the target value, the oxygen gas supply valve 152 is opened to supply oxygen gas to the container 11, and then the oxygen gas supply valve 152 is closed to increase the pressure. The pressure is measured by the total 145, and if the measured value at this time is still not equal to or greater than the target value, the operation of opening the oxygen gas supply valve 152 and supplying oxygen gas to the container 11 is repeated. As a result, the actual pressure inside the container 11 is measured when the main gas shutoff valve 150 is open and the oxygen gas supply valve 152 is closed, that is, only the pressure inside the container 11 is acting on the pressure gauge 145 . is greater than or equal to the target value.

If the actual pressure value in the container 11 is equal to or higher than the target value ("YES" in step S26) and the actual pressure value in the container 11 is equal to or lower than the upper limit value ("YES" in step S27), that is, the container 11 If the actual pressure value inside is equal to or higher than the target value and is close to the target value, the oxygen gas supply step is terminated.

By performing the methane gas supply step, the container 11 is filled with an amount of methane gas that produces a pressure of about 0.2 MPa. Further, by performing the oxygen gas supply step, the pressure inside the container 11, which was about 0.2 MPa in the previous methane gas supply step, rises to about 0.6 MPa. A pressure-generating amount of oxygen gas is filled in container 11 . In this manner, the container 11 is filled with methane gas and oxygen gas in a state of being mixed at a predetermined mixing ratio (1:2 in this example). In this manner, methane gas and oxygen gas are supplied to the container 11 based on the measurement values of the pressure gauge 145 with the main gas shutoff valve 150 open and the methane gas supply valve 151 and the oxygen gas supply valve 152 closed. By introducing them, it is possible to accurately control the amounts of methane gas and oxygen gas supplied. Since the supply amounts of methane gas and oxygen gas can be accurately controlled in this manner, the mixing ratio of methane gas and oxygen gas can be accurately adjusted, thereby accurately adjusting the power of the pressure wave. .

[Ignition process]
FIG. 8 is a flow chart showing the procedure of the ignition process performed in the gas supply system according to one embodiment of the present invention.

<Steps S41 to S42>
When the mixed gas of methane gas and oxygen gas in the container 11 is ignited, the control device 160 shown in FIG. An open signal is transmitted (S41-S42). As a result, the main gas block valve 150 is closed while the gas exhaust valve 156 is opened.

<Step S43>
The controller 160 sends a valve open signal to the purge gas supply valve 159 and at the same time starts energizing the glow plug 71 (S43). As a result, the purge gas from the compressed air gas supply source 157 is introduced into the small-diameter cylindrical portion 8a of the nozzle body 8 via the purge gas supply line 158 and the blowout pipe 76, and the purge gas is supplied to the vicinity of the opening 21 of the container 11. At the same time, the temperature of the mixed gas in the container 11 is raised by the glow plug 71 .

When the mixed gas in the container 11 ignites due to the temperature rise of the mixed gas by the glow plug 71 , combustion/explosion occurs inside the container 11 such that the flame propagates rapidly. The gas inside the container 11 tries to expand at once due to the temperature rise caused by the combustion. The pressure inside the container 11, which is a closed space, suddenly increases, and the sealing body 60, which cannot withstand the pressure, is broken into pieces. When the sealing body 60 is destroyed, high-pressure gas is suddenly ejected from the injection port 25 of the lid 12, and the pressure is released abruptly. A pressure wave is generated as a result of the sudden release of pressure. The generated pressure wave is emitted into the exhaust gas flow path 2 of the boiler 1 through the small diameter cylindrical portion 8a, the inverted truncated cone cylindrical portion 8b and the large diameter cylindrical portion 8c of the nozzle body 8 (see FIG. 1). ). Dust adhering to the heat transfer tubes 4 is peeled off and removed by wind pressure and vibration caused by the pressure waves emitted in this way.

During combustion of the mixed gas in the container 11, the gas main check valve 150 is closed. As a result, even if the pressure in the container 11 tries to act on the pressure gauge 145 via the main supply line 130 during combustion of the mixed gas in the container 11, the gas main check valve 150 is closed so that it is blocked. Therefore, it is possible to protect the pressure gauge 145 used for gas supply control.

Furthermore, when the mixed gas in the container 11 is burned, the gas exhaust valve 156 is kept open, so that when the mixed gas in the container 11 is burned, it acts on the pressure gauge 145 through the main supply line 130. In the unlikely event that the pressure inside the container 11 cannot be stopped even by closing the main gas shutoff valve 150, the pressure is released to the outside ( (inside the boiler 1), and the pressure gauge 145 can be reliably protected.

<Steps S44 to S45>
The control device 160 transmits a valve closing signal to the purge gas supply valve 159 after a predetermined time has elapsed since the start of energization of the glow plug 71 (S43) (S44-S45). As a result, the purge gas supply valve 159 is closed, and the supply of the purge gas to the vicinity of the opening 21 of the container 11 is stopped. At the same time, the energization of the glow plug 71 is stopped (S44-S45).

<Steps S46 to S49>
The control device 160 transmits a valve closing signal to the gas exhaust valve 156 and also transmits a valve opening signal to the gas main shutoff valve 150 (S46-S47). This causes the main gas block valve 150 to open while the gas exhaust valve 156 is closed. Then, the control device 160 determines whether the pressure in the container 11 is less than a predetermined value (for example, 0.1 MPa) based on the measured value of the pressure gauge 145 (S48). Otherwise, the ignition process is terminated ("YES" in step S48). When the pressure in the container 11 is equal to or higher than the predetermined value ("NO" in step S48), the control device 160 outputs an abnormality alarm signal to the alarm device 161 and the display device 162 indicating that the residual pressure is abnormal. Send (S49). As a result, the alarm device 161 emits an alarm sound indicating the residual pressure abnormality, and the display 162 displays a screen, characters, etc. indicating the residual pressure abnormality.

[Sealing body supply step]
FIG. 9 is a flow chart showing the procedure of the sealing body supply process performed in the gas supply system according to one embodiment of the present invention.

<Step S51>
After releasing the pressure wave, the controller 160 shown in FIG. 5 sends a signal to switch the valve position of the directional control valve 82 to the second position 82b in preparation for the next pressure wave release. department (S51). Thereby, the valve position of the directional control valve 82 is switched to the second position 82b.

When the directional control valve 82 is in the second position 82 b , the air in the drive chamber 90 is exhausted through the air line 94 , the directional control valve 82 , the air line 95 and the silencer 96 . Then, the biasing force of the return spring 91 moves the piston body 86 to the right in FIG. By the action of the biasing force of a compression coil spring (not shown) built in the hydraulic cylinder 32 for returning the piston and the biasing force of the biasing means 33 (see FIG. 3), the hydraulic fluid in the hydraulic cylinder 32 is increased to the hydraulic pressure. It is sent to the pressurization chamber 92 via the pipe line 93, and the hydraulic cylinder 32 is contracted. At the same time, as shown in FIG. 3 , the tension rod 51 is pulled rearward by the elastic repulsive force of the compression coil spring 52 in the biasing means 33 , and the container-side flange portion 22 is rearwardly moved away from the lid body 12 . is moved to Along with this, the container 11 is moved backward along the tube axis. Since the container 11 is supported by the support member 39 via the guide rollers 40, the rearward movement of the container 11 is performed smoothly.

When the container-side flange portion 22 is moved rearward, a gap is generated between the container-side flange portion 22 and the sealing body 60 as shown in FIG. The positioned sealing member 60 is not sandwiched between the container-side flange portion 22 and the lid 12 (hereinafter, this state is referred to as a "sealing body non-sandwiching state").

<Step S52>
The control device 160 shown in FIG. 5 transmits a signal for switching the valve position of the direction control valve 113 to the second position 113b to the operating portion of the direction control valve 113 (S52). As a result, the valve position of the directional control valve 113 is switched to the second position 113b. When the directional control valve 113 is in the second position 113b, the compressed air gas from the compressed air gas supply source 121 is supplied to the bottom side of the air cylinder 112, the air cylinder 112 extends, and the shield plate 111 descends. , and the opening 21 of the container 11 (injection port 25 of the lid 12 ) is closed by the shielding plate 111 . Thus, when supplying the sealing body 60 so that the unbroken part of the sealing body 60 closes the opening 21 of the container 11 (injection port 25 of the lid 12) instead of the broken part of the sealing body 60, Foreign matter such as dust that tries to enter the container 11 from the boiler 1 side through the nozzle body 8, the injection port 25 and the opening 21 is blocked by the shielding plate 111 to prevent foreign matter such as dust from entering the container 11. designed to prevent intrusion.

<Steps S53 to S55>
The control device 160 transmits a motor drive signal to the winding motor 66, calculates the feed amount of the sealing body 60 based on the detection result of the feed amount detection means 68, and based on the calculated feed amount, The rotation of the winding motor 66 is controlled, and a motor drive stop signal is sent to the winding motor 66 after a predetermined time has elapsed (S53 to S55). As a result, the take-up motor 66 is operated so as to send the sealing body 60 downward at a predetermined feeding pitch in the state where the sealing body is not sandwiched. As a result, instead of the broken portion (round hole 60b: see FIG. 4(b)) of the sealing body 60, the unbroken portion 60a (see FIG. 4(a)) opens the opening 21 (see FIG. 4(a)) of the container 11. The sealing body 60 can be positioned so as to block the injection port portion 25) of the lid body 12 .

In the attached matter removing apparatus 10A, it is possible to alternately and repeatedly perform the operation of filling and igniting the mixed gas in the sealing body clamping state and the operation of sending the sealing body 60 in the sealing body non-clamping state. As a result, it is possible to continuously emit pressure waves and continuously remove deposits on the heat transfer tubes 4 .

<Step S56>
The control device 160 transmits a signal for switching the valve position of the directional control valve 113 to the first position 113a to the operating portion of the directional control valve 113 (S56). As a result, the valve position of the directional control valve 113 is switched to the first position 113a. When the directional control valve 113 is at the first position 113a, the compressed air gas from the compressed air gas supply source 121 is supplied to the head side of the air cylinder 112, the air cylinder 112 contracts, and the shield plate 111 rises. , and the shielding plate 111 is retracted from the inside of the switching mechanism 13 .

<Step S57>
The control device 160 transmits a signal for switching the valve position of the direction control valve 82 to the first position 82a to the operating portion of the direction control valve 82 (S57). Thereby, the valve position of the directional control valve 82 is switched to the first position 82a. Compressed air from the compressed air gas supply 100 is supplied to the drive chamber 90 when the directional control valve 82 is switched to the first position 82a. As a result, the piston body 86 is moved leftward in FIG. 5, the working oil in the pressure increasing chamber 92 is supplied to the hydraulic cylinder 32, the hydraulic cylinder 32 is extended, and the container side flange portion 22 is opened as a cover. It is moved forward to approach the body 12 . When the container-side flange portion 22 is moved forward, the sealing body 60 positioned between the lid body 12 and the container-side flange portion 22 is sandwiched between the container-side flange portion 22 and the lid body 12 for sealing. The body sandwiching state is reached, and the sealing body supply step is completed.

[Leak check step (1)]
FIG. 10 is a flow chart showing the procedure of the leak check step (1) performed in the gas supply system according to one embodiment of the present invention.

<Step S62>
The control device 160 transmits a valve open signal to the leak check valve 153 (S62). As a result, the leak check valve 153 is opened, and the compressed air gas for leak check is supplied from the compressed air gas supply source 137 to the container 11 through the leak check gas supply line 143 as the leak check gas.

<Steps S63 to S64>
The control device 160 transmits a valve closing signal to the leak check valve 153 after a predetermined time has elapsed (S63-S64). Thereby, the leak check valve 153 is closed. In this way, when the main gas stop valve 150 is open and the leak check valve 153 is closed, the pressure from the leak check gas supply line 143 from the upstream side of the leak check valve 153 is applied to the leak check valve. 153 is closed, the pressure gauge 145 is not affected, and only the pressure from the container 11 side due to the opening of the main gas check valve 150 acts on the pressure gauge 145. It becomes possible to measure the pressure accurately.

<Step S66>
The control device 160 determines whether the pressure inside the container 11 is equal to or higher than a target value (for example, 0.6 MPa) based on the measured value of the pressure gauge 145 (S66). If the pressure inside the container 11 is equal to or higher than the target value ("YES" in step S66), the process proceeds to step S67. If the pressure inside the container 11 is less than the target value ("NO" in step S66), the process proceeds to step S69.

<Steps S67-S68>
In step S67, the control device 160 determines that the pressure in the container 11 is equal to or lower than the upper limit value (for example, 0.66 MPa, which is 1.1 times the target value (0.6 MPa)) based on the measured value of the pressure gauge 145. or not. If the pressure in the container 11 is equal to or lower than the upper limit ("YES" in step S67), the process proceeds to step S76 (see FIG. 11). When the pressure in the container 11 exceeds the upper limit ("NO" in step S67), the alarm device 161 and the indicator emit a signal to issue an abnormal alarm indicating that the pressure in the container 11 exceeds the upper limit. 162 respectively (S68). As a result, the alarm device 161 emits an alarm sound indicating that the pressure in the container 11 exceeds the upper limit, and a screen indicating that the pressure in the container 11 exceeds the upper limit is displayed. Characters and the like are displayed on the display 162 .

<Steps S69 to S75>
In step S69, the control device 160 determines whether or not the number of times (n) of filling with the compressed air gas for leak check is equal to or less than the upper limit of filling times (N) (S69). If the number of filling times of air gas for leak check (n) is equal to or less than the upper limit of filling times (N) ("YES" in step S69), the number of filling times of air gas for leak check (n) is incremented by 1 (n+1→n). (S70), a valve open signal is transmitted to the leak check valve 153 (S71), a valve close signal is transmitted to the leak check valve 153 after a predetermined time has passed (S72-S73), and after a predetermined time has passed, the process returns to step S66. (S74), it is determined whether the pressure in the container 11 is equal to or higher than a target value (for example, 0.6 MPa) (S66). If the leak check air gas filling frequency (n) exceeds the filling frequency upper limit (N) ("NO" in step S69), the leak check air gas filling frequency (n) exceeds the filling frequency upper limit ( N) is exceeded, a signal for issuing an abnormal alarm is sent to the alarm device 161 and the display device 162 (S75). As a result, the alarm device 161 emits an alarm sound indicating that the leak check air gas filling frequency (n) exceeds the filling frequency upper limit (N), and the leak check air gas filling frequency (n) is exceeded. The display 162 displays a screen, characters, or the like indicating an abnormality indicating that the number of times of filling exceeds the upper limit (N).

In this embodiment, the processing of steps S69 to S74 is repeatedly executed based on the judgment in step S66 within the range of the number of filling times (n) of air gas for leak check (n) within the range of the upper limit of filling times (N). That is, in step S66, if the measured value of the pressure gauge 145 is not equal to or greater than the target value, the leak check supply valve 153 is opened to supply the leak check air gas to the container 11, and then the leak check valve 153 is closed to The pressure is measured by the pressure gauge 145, and if the measured value at this time is still not equal to or greater than the target value, the operation of opening the leak check valve 153 and supplying the leak check air gas to the container 11 is repeated. As a result, the actual pressure inside the container 11 in a state where the main gas block valve 150 is open and the leak check valve 153 is closed, that is, only the pressure inside the container 11 acts on the pressure gauge 145 . The pressure value is greater than or equal to the target value.

If the actual pressure value in the container 11 is equal to or higher than the target value ("YES" in step S66) and the actual pressure value in the container 11 is equal to or lower than the upper limit value ("YES" in step S67), that is, the container 11 If the actual pressure value inside is close to the target value, the process proceeds to step S76 (see FIG. 11).

[Leak check step (2)]
FIG. 11 is a flow chart showing the procedure of the leak check step (2) performed in the gas supply system according to one embodiment of the present invention.

<Steps S76-77>
In step S67 (see FIG. 10), the control device 160 shown in FIG. 5 determines that the actual pressure value in the container 11 is equal to or lower than the upper limit value. Based on the measured value of the pressure gauge 145, it is determined whether or not the pressure in the container 11 is equal to or higher than the lower limit value (for example, 0.9 times the target value (0.6 MPa), ie, 0.54 MPa). If the pressure inside the container 11 is equal to or higher than the lower limit value ("YES" in step S77), the process proceeds to step S78. When the pressure in the container 11 is less than the lower limit value ("NO" in step S77), the pressure in the container 11 is less than the lower limit value, in other words, a signal is issued to issue an abnormal alarm indicating that there is a gas leak in the container 11. It transmits to the alarm device 161 and the display device 162 (S83). As a result, the alarm device 161 emits an alarm sound indicating that there is a gas leak in the container 11, and the display 162 displays a screen, characters, etc. indicating that there is a gas leak in the container 11. .

<Steps S78-81>
The control device 160 transmits a valve open signal to the gas exhaust valve 156 after a predetermined time has elapsed since it was determined in step S77 that the actual pressure value in the container 11 is equal to or higher than the lower limit value (S78-S79). . This opens the gas exhaust valve 156 . The control device 160 transmits a valve closing signal to the gas exhaust valve 156 after a predetermined time has elapsed since the gas exhaust valve 156 was opened (S80-S81). Thereby, the gas exhaust valve 156 is closed.

<Step S82>
The control device 160 determines whether the pressure inside the container 11 is less than a predetermined value (for example, 0.1 MPa) based on the measured value of the pressure gauge 145 . If the pressure in the container 11 is less than the predetermined value ("YES" in step S82), it is determined that there is no abnormality in the residual pressure, and the leak check process ends. If the pressure in the container 11 exceeds a predetermined value ("NO" in step S82), the alarm device 161 and the display device 162 output an abnormality alarm signal indicating that the residual pressure in the container 11 is abnormal. Each is transmitted (S84). As a result, the alarm device 161 emits an alarm sound indicating that the residual pressure in the container 11 is abnormal, and a screen, characters, or the like indicating that the residual pressure in the container 11 is abnormal is displayed. displayed on device 162 .

By performing the leak check process, gas leakage from the opening 21 of the container 11 (injection port 25 of the lid 12) blocked by the sealing body 60 can be detected without wasting methane gas or oxygen gas. It can be reliably detected using inexpensive compressed air gas.

The gas supply system, gas supply method, and gas supply program of the present invention have been described above based on one embodiment, but the present invention is not limited to the configuration described in the above embodiment, and the gist thereof is as follows. The configuration can be changed as appropriate within a range that does not deviate. Another specific embodiment is as follows.

[Another embodiment of the switching mechanism]
FIG. 12 is a diagram showing another embodiment of the switching mechanism. Switching mechanisms shown in FIGS. 12(a) to 12(d) can be employed instead of the switching mechanism 13 in the above embodiment.

A switching mechanism 213 shown in FIG. 12( a ) includes a casing 214 , a toggle link 215 , and an air cylinder 216 as an actuator for driving the toggle link 215 .

The casing 214 includes the main frame member 35 and an actuator support member 217 arranged to connect the main frame member 35 and the lid body 12 .

The toggle link 215 is arranged between the container-side flange portion 22 and the main frame member 35 . The toggle link 215 is composed of a first link 221 and a second link 222 . A rear end portion of the first link 221 is connected to a bracket fixed to the main frame member 35 via a first connecting pin 231 . A front end portion of the second link 222 is connected to a bracket fixed to the container-side flange portion 22 via a second connecting pin 232 . A front end portion of the first link 221 and a rear end portion of the second link 222 are connected by a third connecting pin 233 .

A cylinder rod tip of the air cylinder 216 is connected to the toggle link 215 (the first link 221 and the second link 222) via the third link 223 and the third connection pin 233. As shown in FIG. Here, the insertion hole 223a in the third link 223 through which the third connecting pin 233 is inserted is formed in an elongated hole shape elongated in the pipe axis direction of the small-diameter cylindrical portion 11a. By providing such an insertion hole 223a, when the toggle link 215 expands and contracts due to the expansion and contraction of the air cylinder 216, the third connecting pin 233 is allowed to move in the axial direction of the small-diameter cylindrical portion 11a. It is possible to reliably transmit the expansion/contraction force (thrust force) of the air cylinder 216 to the toggle link 215 via the third link 223 and the third connecting pin 233 while preventing radial force from acting on the air cylinder 216 . can. A hydraulic cylinder may be used instead of the air cylinder 216 .

In the switching mechanism 213, when the air cylinder 216 is extended, the third connecting pin 233 is pushed closer to the small-diameter cylindrical portion 111a. Unfolding, the toggle link 215 is unfolded. As a result, the entire container 11 is moved so that the container-side flange portion 22 approaches toward the lid 12 , and the sealing member 60 positioned between the lid 12 and the container-side flange 22 moves toward the lid 12 . and the container-side flange portion 22 to hold the sealing body.

In the switching mechanism 213, when the air cylinder 216 contracts, the third connecting pin 233 is pulled away from the small-diameter cylindrical portion 111a. It contracts and the toggle link 215 is contracted. As a result, the entire container 11 is moved so that the container-side flange portion 22 is separated from the lid member 12, and the sealing member non-sandwiched state in which the sealing member 60 is not sandwiched between the lid member 12 and the container-side flange portion 22. It is said that

The switching mechanism 313 shown in FIG. 12B includes a reaction force receiving member 315, an air cylinder 316 and a hydraulic jack 317.

The reaction force receiving member 315 is made of a frame structure that encloses the container 11 and is fixed to the lid 12 . The air cylinder 316 is attached to the reaction force receiving member 315 . The air cylinder 316 and the container 11 are connected by an arm member 318 . The hydraulic jack 317 is interposed between the end wall portion 20 of the container 11 and the reaction force receiving member 315 .

In the switching mechanism 313 , the expansion operation of the air cylinder 316 moves the container 11 relative to the lid 12 so that the container-side flange portion 22 is separated from the lid 12 . As a result, the sealed body is not sandwiched. By extending the hydraulic jack 317 , the container 11 is moved relative to the lid 12 so that the container-side flange portion 22 approaches the lid 12 . As a result, the sealing body is sandwiched. In this manner, the air cylinder 316 and the hydraulic jack 317 cooperate to switch between the sealing body sandwiching state and the sealing body non-sandwiching state. An electric actuator (for example, an electric cylinder or the like) may be used instead of the fluid actuator such as the air cylinder 316 or the hydraulic jack 317 .

A switching mechanism 413 shown in FIG. 12C includes a reaction force receiving member 415 , an air cylinder 416 and a pressing mechanism 417 .

The reaction force receiving member 415 is composed of a reaction force receiving plate portion 418 facing the end wall portion 20 of the container 11, and a support plate portion 419 fixed to the lid 12 and supporting the reaction force receiving plate portion 418. there is The air cylinder 416 is attached to the reaction force receiving plate portion 418 . A cylinder rod of the air cylinder 416 is connected to the end wall portion 20 of the container 11 . The pressing mechanism 417 includes a main body portion 420 , a claw portion 421 and a hydraulic operating portion 422 . The body portion 420 is slidably mounted in a T-groove (not shown) formed in the lid body 12 so as to extend toward a portion of the lid body 12 facing the container-side flange portion 22 . The claw portion 421 can switch between a pressed state and a non-pressed state against the side portion of the container-side flange portion 22 when the lid 12 and the container-side flange portion 22 sandwich the sealing member 60. It is attached to the body portion 420 via a pivot shaft 423 . The hydraulic operating portion 422 applies torque around the pivot shaft 423 to the claw portion 421 to bring the claw portion 421 into the pressing state.

In the switching mechanism 413 , the pressing mechanism 417 is relatively moved so as to approach the container-side flange portion 22 when the lid 12 and the container-side flange portion 22 sandwich the sealing member 60 . Then, the claw portion 421 presses the container-side flange portion 22 against the lid body 12 by the operation of the hydraulic operation portion 422 . As a result, the sealing body is sandwiched. On the other hand, the pressing mechanism 417 is relatively moved away from the container-side flange portion 22 after the hydraulic operating portion 422 of the pressing mechanism 417 is brought into a non-operating state and the claw portion 421 is brought into a non-pressing state. As a result, the sealed body is not sandwiched. In this way, the relative movement of the pressing mechanism 417 to the container-side flange portion 22 and the switching between the pressing state and the non-pressing state of the claw portion 421 against the container-side flange portion 22 cooperate with each other to achieve the sealing body clamping state and the sealing state. It is possible to switch between the stop body non-clamping state.

A switching mechanism 513 shown in FIG. 12(d) includes a fastener 500 for fastening the lid 12 and the container-side flange portion 22 together. The fastener 500 includes, for example, a bolt 501 passing through the lid 12 and the container-side flange portion 22 while avoiding the sealing body 60 and a nut 502 screwed onto the bolt 501 . In the switching mechanism 513, by tightening the bolt 501 and the nut 502, the sealed body is clamped, and by releasing the bolt 501 and the nut 502, the sealed body is not clamped.

[Another embodiment of sealing body supply mechanism]
FIG. 13 is a diagram showing another embodiment of the encapsulant supply mechanism. A sealing body supply mechanism 615 shown in FIGS. 13A and 13B can be employed instead of the sealing body supply mechanism 15 in the above embodiment.

A sealed body supply mechanism 615 shown in FIGS. 13A and 13B includes a feed mechanism 660 instead of the recovery mechanism 63 in each of the above embodiments. As shown in FIGS. 13(a) and 13(b), the feeding mechanism 660 includes a pair of chuck mechanisms 661 arranged corresponding to both sides of the sealing body 60, and a mounting mechanism supporting the pair of chuck mechanisms 661. It comprises a base plate 662 and an elevating mechanism 663 for elevating the pair of chuck mechanisms 661 via the mounting base plate 662 .

The chuck mechanism 661 includes a pair of claws 664 that are relatively movable in the plate thickness direction of the strip-shaped sealing body 60, and engages the side portion of the sealing body 60 (round holes in FIGS. 13(a) and 13(b)). By moving the pair of claws 664 relatively to the surplus outer portion 60e on both sides of 60b, the side portion of the sealing body 60 can be sandwiched between the pair of claws 664, and the side portion of the sealing body 60 By relatively moving the pair of claws 664 away from each other, the side portion of the sealing body 60 can be released.

The elevating mechanism 663 is formed by combining an air cylinder 665 and a direct-acting guide member 666 . The air cylinder 665 is configured such that the air cylinder 665 as a whole expands and contracts by controlling the supply and discharge of compressed air to and from its main body to move the cylinder rod 665a back and forth in the vertical direction.

The tip of the cylinder rod 665 a of the air cylinder 665 is joined to the central portion of the mounting base plate 662 . The direct-acting guide member 666 is a shaft-shaped member that is inserted into both sides of the main body of the air cylinder 665 so as to be retractable in the vertical direction. The leading end of the linear motion guide member 666 is joined to a central portion of the mounting base plate 662 .

In the feeding mechanism 660 , when the sealed body is not clamped, both sides of the sealed body 60 are clamped by the pair of claws 664 of the pair of chuck mechanisms 661 , and the air cylinder 665 of the elevating mechanism 663 is contracted. When the pair of chuck mechanisms 661 is lowered via the mounting base plate 662 in , the sealing body 60 is sent downward while contacting the container-side flange portion 22 of the container 11 . After that, the sides of the sealing body 60 are released by relatively moving the pair of claws 664 of the pair of chuck mechanisms 661 away from each other, and the attachment base plate 662 is lifted by the extension operation of the air cylinder 665 of the elevating mechanism 663 . By raising the pair of chuck mechanisms 661 through the opening, the above-described downward feeding operation of the sealing body 60 can be performed. In this manner, the operation of lowering the pair of chuck mechanisms 661 with both sides of the sealing body 60 sandwiched by the pair of chuck mechanisms 661 and the operation of raising the pair of chuck mechanisms 661 with the sealing body 60 released are performed. is repeated, the sealing body 60 can be sequentially fed downward at a predetermined feeding pitch.

[Another embodiment of gas supply method and gas supply program]
[Plug electrification check process]
FIG. 14 shows a flowchart showing the procedure of the plug energization check process, in which (a) is performed in parallel with the methane gas supply process, the oxygen gas supply process, the ignition process, and the leak check process (1); is performed in parallel with the exhaust process after the leak check process (2).

As shown in FIG. 14(a), for example, in the methane gas supply step, for example, after executing the process of step S1 and before executing the process of step S2 in the methane gas supply main program (see FIG. 6), By calling the plug energization check subprogram and executing the plug energization check subprogram in parallel with the methane gas supply main program, the plug energization check step shown in steps S91 to S94 is performed in parallel with the methane gas supply step. There are also aspects.

<Steps S91-94>
As shown in the flowchart of FIG. 14(a), the control device 160 (see FIG. 5) starts energizing the glow plug 71 (S91). The control device 160 determines whether or not the value of the current applied to the glow plug 71 measured by the ammeter 170 is equal to or greater than a predetermined value (S92). If the energization current value is equal to or greater than the predetermined value ("YES" in step S92), the plug energization check subprogram is ended, and serial processing of the methane gas supply main program is executed. On the other hand, if the energized current value is less than the predetermined value and a predetermined time has passed ("NO" in step S92 and "YES" in step S93), the control device 160 determines that there is an energization failure caused by a problem such as disconnection. Then, an abnormality alarm signal indicating that the glow plug 71 is not properly energized is transmitted to the alarm device 161 and the display device 162 (see FIG. 5) (S94). In this way, by performing the plug energization check process in parallel with the methane gas supply process, the reliability of the ignition process by the glow plug 71 is improved without requiring time for checking the energization state of the glow plug 71 separately. be able to. In step S<b>91 , it is preferable to shorten the duration of the energization of the glow plug 71 as much as possible (for example, about 0.5 seconds) in order to suppress an increase in the gas pressure inside the container 11 due to the heating of the glow plug 71 .

When the plug energization check step is performed in parallel with the oxygen gas supply step, the plug energization check subprogram is called, for example, before executing the process of step S22 in the oxygen supply main program (see FIG. 7), A plug electrification check step is performed in the same manner as described above (S91-94).

Further, after the explosion in the ignition process, in order to check whether the glow plug 71 is not damaged by the explosion and operates normally, after executing the processing of step S45 and before executing the processing of step S46, , the plug energization check subprogram is called, and the plug energization check step is performed in the same manner as described above (S91-94).

Furthermore, in the example shown in FIG. 14(b), after determining whether or not there is an abnormality in the residual pressure of the container 11 (S82), the sealing member is not sandwiched, and an exhaust step for exhausting the leak check gas from the container 11 is performed. (S85, S86), and in parallel with this exhaust process, the plug energization check subprogram is executed to perform the plug energization check process in the same manner as described above (S91-94).

The plug energization check process shown in steps S91 to S94 is performed in parallel with all of the methane gas supply process, the oxygen gas supply process, the ignition process, the leak check process (1), and the exhaust process after the leak check process (2). Alternatively, it may be carried out in parallel with a step appropriately selected from these steps.

In the above-described embodiment, as an electrical ignition means for igniting the combustion gas (mixed gas of methane gas and oxygen gas), an example using a glow plug 71 that raises the temperature of the combustion gas by energization and ignites is shown. However, the invention is not limited to this, and a spark plug that ignites and explodes the combustion gas with an electric spark may be used.

The gas supply system, the gas supply method, and the gas supply program of the present invention use pressure waves generated by increasing the pressure inside the container by burning the combustion gas supplied inside the container to adhere to an object. A deposit removing device for removing deposited deposits can be used for supplying combustion gas to the container.

10A deposit removal device 11 container 21 opening 60 sealing body 71 glow plug (electric ignition means)
138 Spiral piping (pressure reducing means)
141 methane gas supply line (combustion gas supply line)
142 oxygen gas supply line (combustion gas supply line)
143 Leak check gas supply line (gas leak detection means)
145 pressure gauge (gas leak detection means)
150 gas main shutoff valve (downstream opening/closing valve)
151 methane gas supply valve (upstream side on-off valve)
152 Oxygen gas supply valve (upstream opening/closing valve)
153 Leak check valve (gas leak detection means)
155 gas exhaust pipe 156 gas exhaust valve 158 purge gas supply pipe 159 purge gas supply valve 160 control device (valve control means, gas leakage detection means, energization check means)
170 ammeter (energization check means)

Claims (11)

a combustion gas supply line for supplying combustion gas to the vessel;
an upstream on-off valve and a downstream on-off valve interposed respectively upstream and downstream of the gas flow in the combustion gas supply pipe;
a pressure gauge connected between the upstream on-off valve and the downstream on-off valve in the combustion gas supply line;
valve control means for controlling opening and closing of valves including the upstream on-off valve and the downstream on-off valve;
with
The valve control means controls the upstream opening/closing valve so that the pressure value measured by the pressure gauge when the upstream opening/closing valve is closed approaches a target value assuming that the downstream opening/closing valve is open. A gas supply system that opens and closes an on-off valve and closes the downstream side on-off valve during combustion of the combustion gas supplied into the container . A sealing body is disposed to close the opening of the container, and by increasing the pressure in the container by burning the combustion gas supplied into the container, the sealing body is broken and a pressure wave is generated. 2. The gas supply system according to claim 1 , wherein the gas supply system is applied to a deposit removing device for removing deposits adhering to an object using the pressure wave. a gas exhaust pipe with one end open;
a gas exhaust valve interposed in the gas exhaust pipe;
further comprising
The other end side of the gas exhaust pipeline is connected between a position where the pressure gauge is connected in the combustion gas supply pipeline and a position where the downstream opening/closing valve is interposed,
3. The gas supply system according to claim 1 , wherein the valve control means opens the gas exhaust valve during combustion of the combustion gas supplied into the container. a purge gas supply line for supplying purge gas to the vicinity of the opening of the container;
a purge gas supply valve interposed in the purge gas supply pipeline;
further comprising
4. The gas supply system according to claim 2 , wherein the valve control means opens the purge gas supply valve during combustion of the combustion gas supplied into the container. The gas supply according to any one of claims 1 to 4, further comprising pressure reducing means for reducing pressure acting on the downstream side on-off valve from the container through the combustion gas supply pipe when the combustion gas is burned. system. The opening of the container blocked by the sealing body is determined based on the measurement result of the pressure gauge when compressed air gas is supplied to the container through the combustion gas supply pipe instead of the combustion gas. The gas supply system according to any one of claims 2 to 5, further comprising gas leakage detection means for detecting gas leakage from the part. Equipped with electrical ignition means for igniting the combustion gas,
The gas supply system according to any one of claims 1 to 6, further comprising energization check means for checking the state of energization of said electrical ignition means based on the value of the current supplied to said electrical ignition means and the energization time. . An upstream on-off valve and a downstream on-off valve are interposed respectively on the upstream side and the downstream side of the gas flow in the combustion gas supply pipe for supplying the combustion gas to the container, and the combustion gas supply pipe A pressure gauge is connected between the upstream on-off valve and the downstream on-off valve in
A step of opening and closing the upstream on-off valve so that the pressure value measured by the pressure gauge when the upstream on-off valve is closed approaches a target value when the downstream on-off valve is open. When,
a step of closing the downstream on-off valve during combustion of the combustion gas supplied into the container;
A gas supply method comprising: 9. The gas supply method according to claim 8 , further comprising an energization check step of checking the state of energization of said electrical ignition means based on a current value and an energization time of the electrical ignition means for igniting the combustion gas. A gas supply program executed by a computer that controls the supply of combustion gas to the container,
An upstream on-off valve and a downstream on-off valve are interposed respectively on the upstream side and the downstream side of the gas flow in the combustion gas supply pipe for supplying the combustion gas to the container, and the combustion gas supply pipe A pressure gauge is connected between the upstream on-off valve and the downstream on-off valve in the passage,
A step of opening and closing the upstream on-off valve so that the pressure value measured by the pressure gauge when the upstream on-off valve is closed approaches a target value when the downstream on-off valve is open. When,
a step of closing the downstream on-off valve during combustion of the combustion gas supplied into the container;
A gas supply program that causes the computer to execute. 11. The gas supply program according to claim 10 , further causing the computer to execute a step of checking the energization state of the electrical ignition means based on the current value and the energization time of the electrical ignition means for igniting the combustion gas. .

Images