JP2020094745A - Smoke pipe cleaning device - Google Patents

Abstract

To facilitate smoke pipe cleaning work.SOLUTION: A smoke pipe cleaning device 1 comprises a frame 2, an ash scraping tool 3 that is inserted in a smoke pipe of a boiler and moved in a longitudinal direction, a chain 4 connected to the scraping tool 3, and a handle 5 connected to the chain 4. The frame 2 comprises: a lateral guide 6 that extends in one direction in a horizontal posture, and serves as a passage for the chain 4 and the handle 5; a lateral side opening 7 provided at one end of the lateral guide 6; a vertical guide 8 that extends in a vertical direction, and serves as a passage for the scraping tool 3 and the chain 4; an upward upper opening 9 provided on the upper end side of the vertical guide 8; and a bending guide 10 that connects the lateral guide 6 and the vertical guide 8, and serves as a passage for the scraping tool 3 and the chain 4. The frame 2 has a configuration in which the vertical dimension from the lower end to the upper opening 9 is set to a value smaller than an inner dimension in the vertical direction in a combustion unit of the boiler.SELECTED DRAWING: Figure 1

Description

The present invention relates to a smoke tube cleaning device used for cleaning a smoke tube of a boiler.

As one of the devices that use biomass fuel, a smoke tube type boiler that is a heat utilization device has been conventionally proposed (for example, see Patent Document 1).

This boiler is composed of a can body in which water is stored, a hollow combustion section located inside the can body at a lower position, and a hollow combustion gas collecting section located inside the can body at an upper position. A plurality of smoke pipes that are arranged between the combustion unit and the combustion gas collecting unit in a posture extending in the vertical direction, the lower end side of which is connected to the combustion unit and the upper end side of which is connected to the combustion gas collecting unit. It is configured.

A burner using powdered biomass fuel is installed in the combustion section. One end of a combustion gas discharge duct that extends inward and outward through the side wall of the can body is connected to the side wall of the combustion gas collecting portion so as to communicate with the internal space of the combustion gas collecting portion.

The boiler having such a configuration, the combustion gas generated by burning the biomass fuel in the burner is dispersed from the combustion section to each smoke pipe and circulated, and the combustion gas passing through each smoke tube is collected in the combustion gas collecting section. , Can be discharged through the combustion gas discharge duct. As a result, in the boiler, the heat of the combustion gas can be exchanged with the water stored in the can to raise the temperature of the water in the can.

By the way, the biomass fuel contains ash, and in the boiler, the ash generated by the combustion of the biomass fuel adheres to the inner surface of the smoke pipe through which the combustion gas flows. In the smoke tube, as the amount of ash attached to the inner surface of the smoke tube increases, the efficiency of heat transfer between the combustion gas flowing in the tube and the water outside the tube decreases.

Therefore, the boiler needs a cleaning operation for removing the ash adhering to the inner surface of the smoke pipe regularly or at every set operating time.

In the boiler, the smoke pipe is in a posture extending in the vertical direction, the lower end side opening of the smoke pipe is in the ceiling wall part of the combustion part, and the upper end side opening of the smoke pipe is in the bottom wall part of the combustion gas collecting part. .. Therefore, in the above-mentioned boiler, it is necessary to carry out the work of cleaning the smoke pipe from an inspection port provided on the side wall of the combustion section so as to communicate with the outside.

Therefore, conventionally, when performing a cleaning operation of the smoke tube of the boiler, for example, a cleaning provided with an elastically deformable shaft such as a wire and an ash scraping tool such as a brush attached to the tip side of the shaft. The device is being used.

When performing the cleaning work of the smoke tube using this cleaning device, first, the worker inserts the cleaning device laterally into the combustion part through the inspection port of the side wall part of the combustion part, and further, the ceiling wall of the combustion part. The scraping tool on the tip side of the cleaning device is inserted into the inside of the smoke pipe from the lower end side opening of the smoke pipe that is open to the section. Next, the worker pushes and pulls the shaft of the cleaning device to move the scraping tool in the longitudinal direction inside the smoke tube to scrape off and clean the ash adhering to the inner surface of the smoke tube.

JP, 2017-78550, A

By the way, as one of environmental measures against climate change such as global warming, there is a demand for continuous efforts to reduce the amount of fossil fuels used and carbon dioxide emissions. In order to reduce the amount of fossil fuel used, it is effective to expand the use of biomass, which is a renewable energy, as a fuel.

Therefore, in addition to woody biomass, which is generally used as a biomass fuel, effective use as a fuel is also required for biomass such as agricultural residues and livestock residues.

When agricultural residue or livestock residue is used as the biomass fuel, the ash content in the fuel is generally larger than that when wood biomass is used as the fuel. Therefore, when this type of biomass fuel is used in the conventional boiler shown in Patent Document 1, ash tends to adhere to the inner surface of the smoke pipe.

In particular, when biomass fuel made from livestock residue is burned in a burner, low melting point ash containing chlorine and sulfur may be generated, and this ash is more likely to adhere to the smoke tube.

Therefore, when using the biomass fuel having the property that the amount of ash attached to the inner surface of the smoke tube increases, it is necessary to increase the frequency of the cleaning operation of the smoke tube.

However, in the conventional cleaning device, when performing the cleaning work of the smoke pipe, the worker inserts the scraping tool on the tip side of the cleaning device, which is inserted laterally into the combustion part, into the opening portion on the lower end side of the smoke pipe extending vertically. In addition, for example, since it is necessary to insert the device from an obliquely lower position, it takes time and effort to insert the scraping tool of the cleaning device into the smoke pipe.

Therefore, a cleaning device that can more easily carry out the cleaning work of each smoke pipe of the boiler is desired.

Therefore, the present invention is intended for a boiler having a combustion section in a can body and a plurality of smoke tubes extending in the vertical direction and having a lower end side connected to the combustion section, and more easily performs a cleaning operation of ash attached to the smoke tube. It is an object of the present invention to provide a smoke tube cleaning device that can be used.

In order to solve the above-mentioned problems, the present invention has a can body in which water is stored, a combustion part arranged at a position near a lower part of the can body, and a lower end side extending vertically and attached to the combustion part. A smoke tube cleaning device used for cleaning the smoke tube of a boiler, comprising: a plurality of smoke tubes; and an inspection port with a lid for communicating the combustion part with the outside of the can body, the frame being inserted into the smoke tube. And a longitudinally moving ash scraping tool, a chain having one end attached to the scraping tool, and a handle attached to the other end of the chain. And a lateral guide that is a passage for the chain and the handle, a lateral side opening that is provided at one longitudinal end of the lateral guide, and a vertical guide that extends vertically. A vertical guide serving as a passage for the dropper and the chain, an upward upper opening provided on the upper end side of the vertical guide, the other longitudinal end of the lateral guide, and the lower end side of the vertical guide. And a bending guide that serves as a passage for the chain by connecting between the scraping tool and the chain, and the vertical dimension from the lower end of the frame to the upper opening is the vertical direction in the combustion section of the boiler. The smoke tube cleaning device has a configuration set to a value smaller than the internal dimension.

The vertical guide of the frame may have a circular cross section with the same diameter as the smoke tube of the boiler, or a rectangular cross section with one side having the same dimension as the diameter of the smoke tube.

The frame may be configured such that the vertical guide, the bending guide, and the lateral guide are tubes.

The frame may include an ash storage section.

The frame may include a handle arranged at a portion of the lateral guide near the side opening, and a tire or a frictional resistance reducing member that contacts the ground when the handle is lifted.

The frame may include a camera having a shooting area in a direction in which the upper opening faces.

The chain may be configured such that a roller having an outer diameter larger than the plate height of the link is provided on the outer circumference of the bush of the link.

According to the smoke tube cleaning device of the present invention, the cleaning work of the ash adhering to the smoke tube is performed for the boiler having the combustion section in the can body and the plurality of smoke tubes extending in the vertical direction and having the lower end side connected to the combustion section. It can be done more easily.

It is a figure which shows 1st Embodiment of the smoke pipe cleaning apparatus. It is a figure which shows the use condition of the smoke tube cleaning apparatus of FIG. It is a figure which shows another usage condition of the smoke tube cleaning apparatus of FIG. It is a figure which shows another usage condition of the smoke tube cleaning apparatus of FIG. It is a figure which shows another usage condition of the smoke tube cleaning apparatus of FIG. It is a schematic cutting side view which shows an example of the boiler used as a cleaning target. It is a figure which shows the 1st application example of 1st Embodiment of the smoke tube cleaning device. It is a figure which shows the 2nd application example of 1st Embodiment of the smoke tube cleaning apparatus. It is a figure which shows another example of an ash storage part.

Hereinafter, the smoke tube cleaning device of the present invention will be described with reference to the drawings.

[First Embodiment]
1A and 1B show a first embodiment of a smoke tube cleaning device, FIG. 1A is a schematic sectional side view, and FIG. 1B is a view taken in the direction of arrow AA in FIG. 1A. 1(c) is a BB direction arrow view of FIG. 1(a). FIG. 2 is a schematic sectional side view showing a state in which the frame is installed in the combustion section of the boiler as a usage state of the smoke tube cleaning device of the present embodiment. FIG. 3 is a schematic sectional side view showing a state in which the scraping tool is inserted into the smoke tube as another usage state of the smoke tube cleaning device of the present embodiment. FIG. 4 is a schematic sectional side view showing a state in which the scraping tool is moved over the entire length of the smoke tube as yet another usage state of the smoke tube cleaning apparatus of the present embodiment. FIG. 5 is a schematic sectional side view showing a state in which the scraping tool is pulled back from the inside of the smoke tube to the inside of the casing as still another usage state of the smoke tube cleaning device of the present embodiment. FIG. 6 is a schematic cut side view showing an example of a boiler to be cleaned.

The smoke tube cleaning device of the present embodiment is shown by reference numeral 1 in FIGS. 1 to 5.

Here, first, the configuration of the boiler to be cleaned using the smoke tube cleaning device 1 of the present embodiment will be outlined.

The boiler is shown by reference numeral 100 in FIG. 6, and includes a can body 101, a combustion section 102, a plurality of smoke tubes 103, a combustion gas collecting section 104, a burner 105 attached to the combustion section 102, and a combustion section 102. The inspection port 106 of FIG.

The can body 101 is a container that stores water 107 to be heated, and is, for example, a container that has a vertically extending cylindrical side wall. Note that, for convenience of illustration, in FIG. 6, the water 107 is hatched with dots.

The combustion section 102 is configured to include, for example, a cylindrical space section having a certain height dimension inside. The combustion unit 102 is arranged at a position closer to the lower portion inside the can body 101 and at a position above the lower end wall of the can body 101 with a gap of a set dimension therebetween.

In the combustion section 102, a burner attachment section 108, which is cylindrical and has a posture along the radial direction of the can body 101 from the outside of the can body 101, is provided at one position in the circumferential direction of the side wall section, as an internal space of the combustion section 102. It is attached so that it can communicate.

The burner 105 is inserted and attached to the burner attachment portion 108 in a posture in which the burner 105 faces the inside of the combustion portion 102.

Although not shown, the burner 105 is connected to a fuel supply unit for supplying powdery biomass fuel and an air supply unit for supplying combustion air. As a result, the boiler 100 can supply the flame generated by burning the biomass fuel in the burner 105 and the high-temperature combustion gas to the inside of the combustion unit 102.

The combustion section 102 is further provided with an inspection port 106 at one position in the circumferential direction of the side wall section and at a position where it does not interfere with the burner mounting section 108, for example, at a position 180 degrees away from the burner mounting section 108 in the circumferential direction. ing.

The inspection port 106 is formed in a cylindrical shape in a posture along the radial direction of the can body 101, and one end side thereof is attached to a side wall portion of the combustion unit 102 so as to communicate with the internal space of the combustion unit 102. The other end of the inspection port 106 is arranged outside the can body 101 and has a lid 109 that can be opened and closed.

As a result, the boiler 100 keeps the lid 109 of the inspection port 106 closed during operation. Further, in the boiler 100, when the lid 109 is opened when the operation is stopped, an operator (not shown) connects the inside of the combustion unit 102 through the inspection port 106 from the outside of the can body 101 and further to the combustion unit 102 as described later. The inside of each of the smoke tubes 103 can be cleaned.

The combustion gas collecting portion 104 is configured to have, for example, a cylindrical space portion having a certain height dimension inside. The combustion gas collecting portion 104 is arranged at a position near the upper part in the can body 101 and at a position below the upper end of the can body 101 by a set dimension.

In the combustion gas collecting portion 104, a combustion gas discharge duct 110 having an attitude extending from the outside of the can body 101 along the radial direction of the can body 101 is provided at one position in the circumferential direction of the side wall portion, and inside the combustion gas collecting portion 104. It is attached to communicate with the space.

The plurality of smoke tubes 103 are arranged parallel to each other between the combustion section 102 and the combustion gas collecting section 104 in a posture extending in the vertical direction. The lower end side of each smoke pipe 103 is attached to the ceiling wall portion of the combustion unit 102 in a state of communicating with the internal space of the combustion unit 102. The upper end side of each smoke pipe 103 is attached to the bottom wall portion of the combustion gas collecting portion 104 in a state of communicating with the internal space of the combustion gas collecting portion 104.

On the upper end side of the can body 101, an open-type expansion tank 111 is provided integrally with the can body 101.

When the combustion gas generated by burning the biomass fuel in the burner 105 is blown into the inside of the combustion section 102, the boiler 100 having the above configuration causes the combustion gas to be dispersed and flow from the combustion section 102 into each smoke pipe 103. Thus, the inside of each smoke pipe 103 can be circulated. After that, the combustion gas that has passed through the respective smoke tubes 103 can be collected in the combustion gas collecting unit 104, and the combustion gas collected in the combustion gas collecting unit 104 is discharged from the combustion gas collecting unit 104 to the combustion gas exhaust duct 110. Can be discharged to the outside of the can body 101.

As a result, in the boiler 100, heat exchange between the combustion gas and the water 107 stored in the can body 101 is performed via the wall of the combustion unit 102, the wall of each smoke pipe 103, and the wall of the combustion gas collecting unit 104. It can be performed continuously, and the temperature of the water 107 in the can 101 can be raised to generate so-called hot water.

Reference numeral 112 is ash attached to the inner surface of the smoke pipe 103 as the boiler 100 is operated.

As shown in FIG. 1, the smoke tube cleaning device 1 of this embodiment used for cleaning the smoke tube 103 of the boiler 100 shown in FIG. 6 has a frame 2, a scraping tool 3, and one end side in the longitudinal direction which is the tip side. The chain 4 attached to the scraping tool 3 and the handle 5 attached to the other end side in the longitudinal direction which is the base end side of the chain 4 are configured.

The frame 2 includes a lateral guide 6 extending in one direction in a lateral posture, a lateral side opening 7 provided at one end of the lateral guide 6 in the longitudinal direction, and a vertical guide 8 extending in the vertical direction. The upper guide 9 is provided on the upper end side of the vertical guide 8, and the bending guide 10 that connects the other end of the lateral guide 6 in the longitudinal direction and the lower end of the vertical guide 8 is provided. It is configured.

The lateral guide 6 is configured to have an internal space that serves as a passage that extends from the side opening 7 on one end side in the longitudinal direction to the other end side. As a result, the lateral guide 6 passes through the scraping tool 3, the chain 4 and the handle 5 received from the side opening 7, so that the lateral guide 6 moves in the direction in which the scraping tool 3, the chain 4 and the handle 5 move. 6 has a function of guiding in a direction along the longitudinal direction.

The bending guide 10 has a quadrant circular arc shape, and is configured to have an internal space serving as a passage that penetrates from one end side to the other end side of the circular arc. As a result, the bending guide 10 passes the scraping tool 3 and the chain 4 received from the lateral guide 6 side, so that the scraping tool 3 and the chain 4 are moved in the arcuate direction from the lateral direction. It has a function to change vertically.

The vertical guide 8 is configured to include a passage that extends from the lower end side to the upper opening 9 on the upper end side. As a result, the vertical guide 8 passes the scraping tool 3 and the chain 4 received from the bending guide 10 side so that the moving direction when the scraping tool 3 and the chain 4 pass through the upper opening 9 is changed to the vertical guide. 8 has a function of guiding in the vertical direction.

In this embodiment, the lateral guides 6 and the vertical guides 8 are straight pipes having a circular cross section with the same diameter as the smoke pipe 103 (see FIG. 6) of the boiler 100 to be cleaned. The bending guide 10 is a bending tube having a circular cross section with the same diameter as the lateral guide 6 and the vertical guide 8.

The frame 2 is further provided as a single or a plurality of places near the lower end of the frame 2, for example, a position near the lower part of the bending guide 10 and a lower side of the lateral guide 6, and a support 11 for supporting the frame 2 and maintaining its posture. Are attached respectively. As a result, as shown in FIG. 2, the frame 2 can be installed on the bottom wall portion of the combustion section 102 of the boiler 100 via the support 11. In this state, the frame 2 has the upper opening 9 facing upward. The side opening 7 can be made to stand on its own in a posture in which the side opening 7 is oriented horizontally.

If the frame 2 can be installed in the combustion section 102 of the boiler 100 in a self-supporting posture as shown in FIG. 2, the size of the frame 2 and a frame such as the bottom wall section of the combustion section 102 of the boiler 100. The shape of the support 11, the position where the support 11 is attached to the frame 2, and the number of attachments may be changed as appropriate according to the shape of the planned installation location of No. 2.

When the frame 2 includes a plurality of supports 11, the shapes of the supports 11 may be different. For example, in the boiler 100, when there is a step between the bottom wall of the combustion section 102 and the lower end of the inspection port 106 and the frame 2 is installed over the step, the frame 2 is Alternatively, the support 11 having different vertical dimensions so as to be able to absorb a step difference may be provided, or the support 11 having a vertical dimension adjusting function may be provided.

The frame 2 has a vertical dimension α from the lower surface of the support 11 which is the lower end of the frame 2 to the upper opening 9 in the combustion portion 102 of the boiler 100 to be cleaned shown in FIG. It is set to a value smaller than the inner dimension H of the position. At this time, the dimension α is set so as to satisfy the following condition with reference to the dimension H. The condition is that there is a gap in the path of the scraping tool 3 and the chain 4 in the width of the difference between the dimension H and the dimension α along the direction orthogonal to the longitudinal direction of the path. Also, the condition is that the scraping tool 3 and the chain 4 can pass through the gap without getting caught.

In the frame 2, the radius dimension of the arc shape of the bending guide 10, the length dimension of the vertical guide 8 and the vertical dimension of the support 11 are appropriately set based on the dimension α determined as described above. ..

As a result, the frame 2 can be disposed in the combustion section 102 of the boiler 100 so that the upper opening 9 faces the opening directly below the opening on the lower end side of the smoke pipe 103 to be cleaned. In this state, a gap is formed between the opening on the lower end side of the smoke tube 103 and the upper opening 9 of the frame 2, and the gap may cause the scraping tool 3 and the chain 4 to be caught. It doesn't become big.

The smoke tube cleaning device 1 of the present embodiment is for cleaning the smoke tube 103 of the boiler 100 by an operator (not shown) operating outside the inspection port 106 of the boiler 100 shown in FIG. Is. Therefore, in the frame 2, when the upper opening 9 is arranged directly below the smoke pipe 103, which is the farthest position from the inspection port 106, of the smoke pipe 103 to be cleaned, the side opening 7 of the lateral guide 6 is closer to the side opening 7. Is designed to protrude outside the inspection port 106 by a set dimension.

Further, the frame 2 is provided with a handle 12 on the upper side of a portion of the lateral guide 6 near the side opening 7. This handle 12 is held by an operator (not shown) and is used when the smoke tube cleaning device 1 of the present embodiment is moved. In particular, the frame 2 is inserted into the combustion section 102 of the boiler 100. It is used for installation work.

Further, when the smoke tube cleaning device 1 of the present embodiment is used to clean the smoke tube 103, the operator pushes the handle 5 into the lateral guide 6 through the side opening 7, or the side portion, as described later. The operation of pulling out from the opening 7 is performed. Therefore, the handle 12 is also used for the purpose of holding the frame 2 so that the frame 2 does not move due to the force applied to the handle 5 when the operator pushes and pulls the handle 5.

It should be noted that the handle 12 may be of any form and shape other than the one shown in the figure as long as the operator can hold the handle 12 and apply a force for moving the frame 2 or holding it in place. is there.

Further, as shown in FIG. 1, it is preferable that the frame 2 has a tire 13 at a position farther from the handle 12 than the support 11 at the farthest position from the handle 12. The tire 13 is attached to the bending guide 10 via, for example, a bracket 14 extending in the vertical direction. Alternatively, although not shown, the tire 13 may be held by the support 11 at a position farthest from the handle 12.

The tire 13 is provided such that when the frame 2 is installed on a certain plane via the supports 11, the lower end of the tire 13 is in contact with the plane or is slightly separated.

With this configuration, in the frame 2, when the handle 12 is lifted and the frame 2 is tilted, the tire 13 can be grounded on a flat surface, and each support 11 can be separated from the flat surface. Therefore, the operator can easily move the frame 2 through the tire 13 with the handle 12 being lifted. Therefore, in the frame 2 having this configuration, as shown in FIG. 2, the frame 2 is inserted into the combustion section 102 from the inspection port 106 of the boiler 100, and the upper opening 9 of the frame 2 is a smoke pipe 103 to be cleaned. It is possible to reduce the labor and time required for the work of arranging so as to face the lower end side opening.

Further, it is preferable that the frame 2 be provided with a camera 15 with illumination in an upward posture near the upper opening 9, for example, outside the vertical guide 8. The camera 15 is installed so that the direction in which the upper opening 9 faces becomes the shooting area.

By the way, the frame 2 is in an inclined posture when the handle 12 is lifted and moved through the tire 13 as described above. Therefore, the camera 15 attached to the upper opening 9 and the vertical guide 8 is tilted in a direction away from the inspection opening 106 around the tire 13 when the frame 2 is inserted into the combustion section 102 from the inspection opening 106. Becomes After moving the frame 2 and releasing the lifted state of the handle 12 and installing the frame 2 in the combustion section 102, the upper opening 9 and the camera 15 are tilted about the tire 13 described above. Since the frame 2 is released, the frame 2 is displaced in the direction closer to the inspection port 106 than when the frame 2 is moved.

Therefore, while the frame 2 is being moved, the position where the upper opening 9 is to be arranged when the frame 2 is installed, that is, when the tilted posture of the frame 2 is released, is not blocked by the frame 2 and the position of the camera 15 is maintained. From the viewpoint of allowing the camera 15 to fit in the shooting area, it is more preferable that the camera 15 is provided at a position closer to the handle 12 than the upper opening 9. However, if the camera 15 can confirm that the upper opening 9 of the frame 2 is arranged immediately below the opening on the lower end side of the smoke pipe 103 to be cleaned, with the frame 2 installed in the combustion section 102 of the boiler 100. The installation position and installation posture of the camera 15 with respect to the frame 2 are not limited to the illustrated configuration, and may be set freely.

The camera 15 is connected to a monitor (not shown) provided in the vicinity of the handle 12 or a monitor (not shown) separately held by an operator via a cable (not shown) arranged along the frame 2.

As a result, the operator inserts the frame 2 into the combustion section 102 from the inspection port 106 of the boiler 100 with the handle 12 lifted, and arranges the upper opening 9 of the frame 2 directly below the smoke pipe 103 to be cleaned. The work to be performed can be performed while checking the image of the inside of the combustion unit 102 captured by the camera 15 on the monitor. Therefore, according to the configuration including the camera 15, the smoke tube cleaning device 1 of the present embodiment performs the cleaning operation of the ash 112 attached to the smoke tube 103 of the boiler 100 shown in FIG. The work of installing the frame 2 inside the 102 can be facilitated.

Further, since the smoke tube cleaning device 1 of the present embodiment is configured to include the camera 15, the operator moves the frame 2 to dispose the camera 15 directly below or near a certain smoke tube 103. As a result, the adhesion state of the ash 112 on the inner surface of the smoke tube 103 can be confirmed based on the image captured by the camera 15. Therefore, when the smoke tube cleaning device 1 of the present embodiment sets the image capturing target of the camera 15 to the smoke tube 103 for which the cleaning process has not been performed, it becomes possible to confirm whether or not the cleaning operation is necessary for the smoke tube 103. .. Further, when the smoke tube cleaning device 1 of the present embodiment uses the smoke tube 103 after the cleaning process as the object to be photographed by the camera 15, the smoke tube 103 can know the condition of the ash 112 remaining after the cleaning operation, and is desired. It is possible to confirm whether the cleaning effect has been achieved.

As shown in FIG. 3, the scraping tool 3 has a function of scraping off the ash 112 adhering to the inner surface of the smoke tube 103 by inserting it into the smoke tube 103 of the boiler 100 and moving it in the longitudinal direction of the smoke tube 103. Be prepared.

As the scraping tool 3 having such a function, for example, in consideration of availability, manufacturing cost, etc., a substantially cylindrical metal wire or chemical fiber having an outer diameter corresponding to the inner diameter of the smoke tube 103 is used. It is preferable to use a brush.

The scraping tool 3 may be a brush made of a natural fiber such as a plant fiber as long as it has a function of scraping off the ash 112 attached to the smoke tube 103 as described above, and the shape of the brush is substantially the same. Of course, it is not limited to the cylindrical shape. Further, the scraping tool 3 has a configuration other than a brush, for example, a configuration in which a plurality of disc-shaped scraper members having an outer diameter smaller than the inner diameter of the smoke tube 103 by a plurality of steps are provided, and the scraper 3 has an inner diameter smaller than that of the smoke tube 103. With a set size, a spiral scraper member having a small outer diameter, and a structure conventionally used for removing the ash 112 adhering to the inside of the smoke tube 103, or a structure conventionally proposed. May be.

As shown in FIG. 1, the chain 4 is configured such that a roller 17 having an outer diameter larger than the plate height of the link 16 is rotatably provided on the outer circumference of a bush (not shown) of the link 16.

As a chain provided with a roller having a diameter larger than the plate height of the link, a conveyor chain provided with a so-called large roller is known. Therefore, the chain 4 in the present embodiment can be easily formed by using this type of conveyor chain. Further, it goes without saying that the chain 4 may be manufactured exclusively.

The chain 4 can be passed inside the lateral guides 6 and the vertical guides 8 which are straight pipes, and the bending guides 10 which are curved pipes having a circular cross-section, and a compression direction from both sides in the longitudinal direction. The outer diameter of the roller 17 and the dimensions of each part of the link 16 are set so that the chain 4 does not bend and stack inside the guides 6, 8 and 10 even if the force of (4) is applied. .. Further, when the chain 4 moves inside the lateral guide 6, the bending guide 10 and the vertical guide 8, the roller 4 is configured to contact the inner surfaces of the guides 6, 10 and 8 only by the rollers 17 as much as possible. It is more preferable that the outer diameter of 17 and the dimensions of each part of the link 16 are set.

The handle 5 is a rod-shaped member that can be inserted from the side opening 7 into the lateral guide 6 and extends in one direction. Further, the handle 5 has one end side in the longitudinal direction, which is the tip side, connected to the other end side in the longitudinal direction of the chain 4.

Thereby, when the handle 5 is pushed inward from the side opening 7 along the lateral guide 6, the smoke tube cleaning device 1 of the present embodiment moves up and down with respect to the scraping tool 3 via the chain 4. A force in the upward pushing direction can be applied along the direction guide 8, and a force in the upward pushing direction can also be applied to the scraping tool 3 inserted in the smoke pipe 103 above the upper opening 9. be able to.

On the other hand, when the handle 5 inserted into the lateral guide 6 through the side opening 7 is operated in the direction of pulling it out of the lateral guide 6, the smoke tube cleaning device 1 of the present embodiment causes the upper opening 9 through the chain 4. A force in a downward pulling direction can be applied to the scraping tool 3 located above.

The length dimension of the handle 5 is set to a value larger than the passage length of the lateral guide 6 by the set dimension.

The length dimension of the chain 4 was obtained by subtracting the length dimension of the scraping tool 3 from the value obtained by adding the total length of the smoke pipe 103, the passage length of the vertical guide 8 in the frame 2 and the passage length of the bending guide 10. It is set to be larger than the resulting value.

As a result, in the smoke tube cleaning device 1 of the present embodiment, as shown in FIG. 4, the base end side of the chain 4 connected to the handle 5 is located at the connection point between the lateral guide 6 and the bending guide 10 in the frame 2. When positioned, the scraping tool 3 attached to the tip end side of the chain 4 can be positioned on the upper end side of the smoke tube 103.

As described above, the frame 2 has the vertical dimension α from the lower end of the frame 2 to the upper opening 9 and the lateral guide 6 from the upper opening 9 based on the configuration of the combustion section 102 and the smoke tube 103 in the boiler 100. The dimension up to the portion near the side opening 7 is set. Therefore, in the frame 2, when the radius of curvature of the passage of the bending guide 10 is determined, the passage length of the vertical guide 8, the passage length of the bending guide 10, and the passage length of the lateral guide 6 are determined. Therefore, the dimension obtained by subtracting the length dimension of the chain 4 and the length dimension of the scraping tool 3 set as described above from the dimension obtained by adding the passage lengths of the respective guides 6, 8 and 10 is shown in FIG. , The initial insertion amount of the handle 5 in the state at the time of starting the work shown in FIG.

In the smoke tube cleaning device 1 of the present embodiment, the required length dimension of the chain 4 increases as the total length of the smoke tube 103 of the boiler 100 increases. Therefore, in the frame 2, the passage length of the lateral guide 6 is appropriately adjusted according to the length dimension of the chain 4, and the passage length of each of the guides 6, 8 and 10 is added, and A desired initial insertion amount of the handle 5 may be obtained by subtracting the length dimension of the scraping tool 3 from the length dimension.

As a result, in the smoke tube cleaning device 1 of the present embodiment, as shown in FIG. 1, when the scraping tool 3 is arranged in the frame 2 in the vicinity of the upper opening 9, the vertical guide 8 and the bending guide 10 of the frame 2 are arranged. , The chain 4 can be housed inside the lateral guide 6 over the entire length, and the handle 5 has the distal end thereof guided from the side opening 7 of the frame 2 with the set initial insertion amount. It can be arranged to be plugged in 6.

When the smoke tube cleaning device 1 of the present embodiment having the above configuration is used to clean the smoke tube 103 of the boiler 100 shown in FIG. 6, the procedure is as follows.

First, an operator (not shown) arranges the scraping tool 3, the chain 4, and the handle 5 on the frame 2 in the smoke tube cleaning device 1 of the present embodiment, as shown in FIG. Specifically, the scraping tool 3 is arranged in the frame 2 in the vicinity of the upper opening 9. The chain 4 is arranged such that its entire length is housed in the frame 2. The handle 5 is arranged such that the tip end side is inserted into the lateral guide 6 from the side opening 7 of the frame 2 with an initial insertion amount.

Next, the operator moved the frame 2 through the tire 13 while lifting the handle 12 of the frame 2 and opened the lid 109 (see FIG. 6) of the boiler 100 as shown in FIG. The frame 2 is inserted and installed from the state inspection port 106 to the inside of the combustion unit 102. At this time, the worker installs the frame 2 in a state where the upper opening 9 is located directly below the smoke pipe 103 to be cleaned, while checking the image inside the combustion unit 102 captured by the camera 15 on the monitor. .. At this time, of the supports 11 provided in the frame 2, for the supports 11 arranged outside the inspection port 106 of the boiler 100, a support base 18 as shown by a chain double-dashed line in FIG. It may be installed at a desired height position such as the same height position as the bottom wall portion of 102.

Next, the operator operates the handle 5 in the direction of pushing it into the lateral guide 6 from the side opening 7. As a result, in the smoke tube cleaning device 1 of the present embodiment, as shown in FIG. 3, the scraping tool 3 is pushed upward from the upper opening 9, so that the scraping tool 3 is attached to the smoke tube 103 to be cleaned. It is inserted from the opening on the lower end side.

In this state, the operator continues to push the handle 5 into the lateral guide 6 from the side opening 7, and the force applied to the scraping tool 3 via the chain 4 causes the smoke tube 103 to move. It can be pushed up and moved inside. Thereby, in the smoke pipe 103, the ash 112 adhering to the inner surface of the smoke pipe 103 is peeled from the smoke pipe 103 by the scraping device 3 at a portion where the scraping device 3 passes upward from below.

The ash 112 peeled off from the inner surface of the smoke pipe 103 collects on the upper side of the scraping tool 3 while the scraping tool 3 is inserted into the smoke tube 103.

After that, when the operator inserts the handle 5 into the vicinity of the connection portion of the lateral guide 6 with the bending guide 10, as shown in FIG. 4, the scraping tool 3 can be moved to the upper end side of the smoke pipe 103. Therefore, the smoke pipe 103 can be cleaned over the entire length of the ash 112 using the scraping tool 3.

When the ash cleaning process for the smoke pipe 103 set as the cleaning target is completed as described above, the operator operates the handle 5 inserted in the lateral guide 6 in the direction to pull it out through the side opening 7. As a result, in the smoke tube cleaning device 1 of the present embodiment, the scraping tool 3 moves downward inside the smoke tube 103.

Next, as shown in FIG. 5, the operator inserts the handle 5 through the side opening 7 into the lateral guide 6 in the state shown in FIG. 2, that is, when the operation in the pushing direction is started. The handle 5 is pulled out from the side opening 7 to a position where the size is reduced by the set dimension. In each of the states shown in FIG. 2, FIG. 4, and FIG. 5, management of the insertion amount through the side opening 7 of the handle 5 should be performed with reference to a mark (not shown) attached to the handle 5, for example. do it.

As a result, in the smoke tube cleaning device 1 of the present embodiment, the scraping tool 3 is drawn into the frame 2 from the upper opening 9 to a position that is below the set size. At this time, the ash 112 that has been peeled off from the inner surface of the smoke pipe 103 and accumulated on the upper side of the scraping tool 3 inside the smoke tube 103 is carried by the scraping tool 3 and can be received and collected in the frame 2. it can.

Therefore, the operator may then take out the smoke tube cleaning device 1 of the present embodiment from the combustion section 102 of the boiler 100 and collect the ash 112 from the inside of the frame 2. Therefore, in the smoke tube cleaning device 1 of the present embodiment, the ash 112 peeled off from the inner surface of the smoke tube 103 can be taken out and collected without being dropped to the combustion unit 102, and thus the ash dropped to the combustion unit 102. It is not necessary to separately perform the work for collecting 112.

After that, the worker newly sets one of the untreated smoke pipes 103 as a cleaning target, and then sequentially repeats the process of cleaning the smoke pipe 103 in the same procedure as described above, thereby performing the present implementation. By using the smoke tube cleaning device 1 of the embodiment, it is possible to perform a cleaning operation for removing the ash 112 attached to each smoke tube 103 of the boiler 100.

As described above, according to the smoke tube cleaning device 1 of the present embodiment, the frame 2 is inserted into the combustion section 102 of the boiler 100 through the inspection port 106, and the upper opening 9 of the frame 2 is located directly below the smoke tube 103 to be cleaned. By arranging, the scraping tool 3 can be easily arrange|positioned just under the smoke pipe 103. Therefore, the operator operates the handle 5 and pushes up the scraping tool 3 from the upper opening 9 of the frame 2 through the chain 4 so that the scraping tool 3 passes through the opening on the lower end side of the smoke tube 103. It can be easily inserted into 103.

Therefore, the smoke tube cleaning device 1 of the present embodiment is intended for the boiler 100 including the combustion unit 102 in the can body 101 and the plurality of smoke pipes 103 extending in the vertical direction and having the lower end side connected to the combustion unit 102. The cleaning work of the ash 112 attached to 103 can be performed more easily.

[First Application Example of First Embodiment]
FIG. 7 shows another configuration example of the frame as a first application example of the first embodiment, and is a cross-sectional view at the position of the lateral guide.

In FIG. 7, the same parts as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

The frame 2 of this application example has the same configuration as the frame 2 of the first embodiment, except that the lateral guide 6, the vertical guide 8, and the bending guide 10 are replaced with a tube having a circular cross section. As shown in FIG. 3, the tube has a rectangular cross section. Note that FIG. 7 shows a cross section of the lateral guide 6 as a representative, as in FIG.

In this case, each of the guides 6, 8 and 10 may have one side of the rectangular cross section having the same size as the diameter of the smoke pipe 103 to be cleaned, which is indicated by a chain double-dashed line in FIG. 7.

In the case of this application example, in addition to the fact that the chain 4 can be passed through the guides 6, 8 and 10, the chain 4 can be passed through the smoke tube 103, and the outer diameter of the roller 17 and the link The dimensions of each part of 16 may be set.

The smoke tube cleaning device 1 including the frame 2 of this application example can also be used in the same manner as the smoke tube cleaning device 1 of the first embodiment to obtain the same effect.

Further, when each of the guides 6, 8, 10 is a tube having a rectangular cross section, the scraping tool 3 arranged inside each of the guides 6, 8, 10 is provided at each of four corners of the rectangular cross section of each of the guides 6, 8, 10. A gap is formed between and.

Therefore, in the smoke tube cleaning device 1 including the frame 2 of this application example, when the scraping tool 3 is drawn into the frame 2 through the upper opening 9 after cleaning the smoke tube 103, the scraping tool is peeled off from the inner surface of the smoke tube 103. It is possible to receive the ash 112 accumulated on the upper side of 3 through the gap and to receive the ash 112 in the frame 2 below the scraping tool 3, so that the ash 112 can be easily collected in the frame 2. Can be expected to be effective.

Considering that the frame 2 has the same effect as that of the smoke tube cleaning device 1 of the first embodiment, each of the guides 6, 8 and 10 has a circular cross section and a rectangular cross section. A configuration may be adopted.

[Second Application Example of First Embodiment]
FIG. 8 shows still another configuration example of the frame as a second application example of the first embodiment. FIG. 8A is a cut side view and FIG. 8B is FIG. 8A. It is a CC direction arrow view of.

In FIGS. 8A and 8B, the same parts as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

As shown in FIGS. 8A and 8B, the frame 2 of this application example has an ash storage portion 19 having a storage space for the ash 112 therein, in the same configuration as the frame 2 in the first embodiment. The structure is provided so as to communicate with the passage of the scraping tool 3 in the frame 2.

The ash storage portion 19 is provided, for example, on the inner peripheral side of the arc shape of the bending guide 10 so as to communicate with the internal space of the bending guide 10.

In this case, in the bending guide 10, the peripheral wall of the semicircular portion located near the inner circumference of the arc shape of the quadrant of the bending guide 10 is removed from the peripheral wall of the circular cross section.

The ash storage portion 19 has a width dimension similar to the diameter of the circular cross section of the bending guide 10, and is arranged along the chord connecting one end side and the other end side of the quadrant arc shape of the bending guide 10. The wall 20 and a pair of side walls 21a and 21b connecting one end edge and the other end edge of the wall 20 in the width direction to the corresponding peripheral wall of the bending guide 10 are provided. As a result, in the frame 2 of this application example, the internal space of the ash storage portion 19 communicates with and is integrated with the internal space of the bending guide 10.

The smoke tube cleaning device 1 including the frame 2 of this application example can also be used in the same manner as the smoke tube cleaning device 1 of the first embodiment to obtain the same effect.

Furthermore, in the smoke tube cleaning device 1 including the frame 2 of the present application example, after cleaning the smoke tube 103, the scraping tool 3 is drawn into the frame 2 through the upper opening 9, and the scraping tool 3 is bent. When the ash 112 is peeled off from the inner surface of the smoke tube 103 and accumulated on the upper side of the scraping tool 3 when it is lowered to the middle position, the ash 112 can be dropped into the ash storage portion 19 by its own weight.

Therefore, in the frame 2 of the present embodiment, the ash 112 can be stored in the ash storage portion 19, so that the frequency of work for collecting the ash 112 from the frame 2 can be reduced. Therefore, the smoke tube cleaning device 1 including the frame 2 of the present embodiment can be expected to have an effect of further facilitating the cleaning work of the ash 112 attached to the smoke tube 103.

Further, in the frame 2 of the present application example, the ash storage portion 19 is provided inside the arc shape of the quadrant of the bending guide 10. The configuration including the ash storage portion 19 can be realized without inviting an increase in the planar shape. Further, the frame 2 of this application example does not particularly affect the function of guiding the scraping tool 3 and the chain 4 along the arc shape of the bending guide 10.

Note that the ash storage portion 19 is preferably provided on the inner peripheral side of the arc shape of the bending guide 10 from the viewpoint of not increasing the planar shape of the smoke tube cleaning device 1. However, the ash storage portion does not affect the function of guiding the scraping tool 3 and the chain 4 provided in the frame 2 in a predetermined direction, and the scraping tool 3 drawn into the frame 2 through the upper opening 9. If the ash 112 that is entrained in the frame 2 and falls into the frame 2 can be dropped by its own weight or sent by the operation of the scraping tool 3 and the chain 4, the ash 112 may have an arrangement or shape other than that shown in the drawings. Good. For example, the ash storage portion 19 may be attached to the side surface of the vertical guide 8 or the bending guide 10 of the frame 2 as shown in FIG. Further, the ash storage section may be configured to include an opening/closing port for the ash 112 that can be opened and closed, or a configuration including a container that can be attached to and detached from the frame 2.

Note that the smoke tube cleaning device of the present disclosure is not limited to the above-described embodiment and each application example.

The shapes, sizes, and ratios of the sizes of the constituent members of the smoke cleaning device 1 shown in the drawings are for convenience of illustration, and reflect the actual shapes, sizes, and ratios of the sizes. is not.

In order to obtain the effect of collecting the ash 112 peeled off from the smoke tube 103 in the frame 2, it is preferable that the guides 6, 8 and 10 are tubes having no opening in the peripheral wall. However, the lateral guides 6, the vertical guides 8, and the bending guides 10 in the frame 2 have a function of guiding corresponding ones of the scraping tool 3, the chain 4, and the handle 5 through the passage in a predetermined direction. If so, the ash 112 may have openings or holes through which the ash 112 can pass. For example, the lateral guide 6, the vertical guide 8 and the bending guide 10 of the frame 2 are a pair of gutter-shaped members that are arranged to face each other across the passage forming position, and are a connecting member that is arranged at a certain interval in the longitudinal direction. It is also possible to adopt a connected structure or a structure in which plate members arranged on all four sides of the passage forming position are connected by connecting members arranged at certain intervals in the longitudinal direction.

Even if the frame 2 has such a configuration, the smoke tube cleaning device of the present disclosure cleans the upper opening 9 of the frame 2 by inserting the frame 2 into the combustion section 102 of the boiler 100 from the inspection port 106. By arranging the scraping tool 3 directly under the smoke tube 103, the scraping tool 3 can be easily arranged directly under the smoke tube 103. Therefore, the scraping tool 3 can be easily inserted into the smoke tube 103 through the opening on the lower end side of the smoke tube 103. The effect of being able to insert into can be obtained.

When the frame 2 has openings or holes through which the ash 112 can pass, when the scraping tool 3 is pulled out below the smoke tube 103 after cleaning the smoke tube 103, the ash 112 peeled off from the smoke tube 103 is All or all of them fall into the combustion section 102. In this case, the ash 112 that has dropped onto the combustion unit 102 may be taken out from the inspection port 106 by separately performing a cleaning operation of the combustion unit 102 from the inspection port 106.

As a member for facilitating the movement, the frame 2 may be configured to include a friction resistance reducing member such as a fluororesin in place of the tire 13 in a position to be grounded when the handle 12 is lifted.

The frame 2 includes the tire 13 and the frictional resistance reducing member from the viewpoint of reducing the labor required for inserting the frame 2 into the combustion section 102 from the inspection port 106 of the boiler 100 and installing the frame 2. Although preferably configured, the tire 13 and the frictional resistance reducing member are not essential.

The frame 2 is preferably provided with the camera 15, but may not have the camera 15. In this case, the operator may visually locate the upper opening 9 of the frame 2 directly below the smoke pipe 103 to be cleaned through the inspection port 106 of the boiler 100.

The bending guide 10 of the frame 2 does not have to be a strict arc shape as long as it can change the direction in which the chain 4 is guided and moved between the lateral guide 6 and the vertical guide 8.

Considering that the chain 4 can be smoothly moved within the frame 2, the chain 4 is provided with a roller 17 having an outer diameter larger than the plate height of the link 16 on the outer circumference of the bush of the link 16. Is preferred. However, the chain 4 may be of a type that does not include a roller having an outer diameter larger than the plate height of the link 16. In this case, a liner for reducing the frictional resistance due to the fluororesin or the like may be appropriately provided on the inner surface of the portion of the frame 2 which becomes the passage of the chain.

Needless to say, various changes can be made without departing from the scope of the present invention.

2 Frame 3 Scraping tool 4 Chain 5 Handle 6 Lateral guide 7 Side opening 8 Vertical guide 9 Upper opening 10 Bending guide 12 Handle 13 Tire 15 Camera 19 Ash storage section 100 Boiler 101 Can body 102 Combustion section 103 Fire tube 106 Inspection Mouth 107 Water 109 Lid 112 Ash H Dimensions

Claims (7)

A can body in which water is stored, a combustion part arranged at a position near the lower part of the can body, a plurality of smoke tubes extending in the vertical direction and having a lower end side attached to the combustion part, the combustion part and the can body. An inspection port with a lid that communicates with the outside of, and a smoke tube cleaning device used for cleaning the smoke tube of a boiler including:
Frame and
An ash scraping tool that is inserted into the smoke pipe and moved in the longitudinal direction,
A chain whose one end side is attached to the scraping tool,
A handle attached to the other end of the chain,
The frame is
A lateral guide extending in one direction in a lateral posture and serving as a passage for the chain and the handle;
A lateral side opening provided on one end side in the longitudinal direction of the lateral guide;
A vertical guide that extends in the vertical direction and serves as a passage for the scraping tool and the chain;
An upward upper opening provided on the upper end side of the vertical guide,
By connecting the other end side of the longitudinal direction of the lateral guide and the lower end side of the vertical guide, the scraping tool and a bending guide that serves as a passage of the chain,
A smoke tube cleaning device, wherein a vertical dimension from a lower end of the frame to the upper opening is set to a value smaller than a vertical dimension in the combustion section of the boiler. The smoke tube according to claim 1, wherein the vertical guide of the frame has a circular cross section having the same diameter as the smoke tube of the boiler, or a rectangular cross section having one side having a dimension similar to the diameter of the smoke tube. Cleaning device. The smoke tube cleaning device according to claim 1 or 2, wherein the frame includes the vertical guide, the bending guide, and the lateral guide as tubes. The smoke tube cleaning device according to claim 3, wherein the frame includes an ash storage portion. The frame is
A handle arranged at a portion of the lateral guide near the side opening,
The smoke tube cleaning device according to any one of claims 1 to 4, further comprising a tire or a frictional resistance reduction member that grounds when the handle is lifted. The smoke tube cleaning device according to any one of claims 1 to 5, wherein the frame includes a camera having a shooting area in a direction in which the upper opening faces. The smoke chain cleaning device according to any one of claims 1 to 6, wherein the chain has a structure in which a roller having an outer diameter larger than a plate height of the link is provided on an outer circumference of a bush of the link.

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