JPH0791886A - Washing device - Google Patents

Abstract

PURPOSE:To enable an efficient and positive washing to be carried out by a method wherein when a washed member such as a branch pipe having some fins for heat exchanging operation at its outer surface is washed, there are provided a moving boggie moved in a horizontal direction along guide rails and a nozzle header moved vertically along a supporting column. CONSTITUTION:In the case that a preheater arranged to be utilized by recovering non-utilized energy within waste gas of a boiler is cleaned, at first, a cleaning device is assembled within the preheating chamber, a base table is arranged in parallel with a row of pipes and then a nozzle 52 is oppositely faced against a branch pipe S. Then, air flowed from an air source is supplied form a lubricator 75 to an air motor 62 through a changing-over valve 81 to cause a nozzle header 51 to be lifted up. Then, when the nozzle header 51 reaches its upper limit position and a pressing piece 69 presses an upper limit sensing valve 82, the changing-over valve 81 is changed over to a descending side. At this time, cleaning liquid is supplied form a hose 53 to the nozzle header 51 so as to clean the branch pipe S. In addition, the moving boggie is intermittently advanced by the air motor 33.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning device for cleaning an object to be cleaned such as a branch pipe having an outer surface provided with fins for heat exchange.

[0002]

2. Description of the Related Art A boiler has a preheating device such as an economizer for warming water with waste gas and a gas-gas heater for warming fuel gas with waste gas in order to recover and use unused energy in waste gas. It is connected. FIG. 6 is a schematic diagram showing the configuration of a preheating device using the above-mentioned waste gas. In FIG. 6, R represents a preheating chamber, for example, the height is 5 m, the width is 6 m, the depth is a length according to the number of tube rows arranged inside, and the waste is supplied from the boiler to the inlet Ri. The gas flows out from the outlet Ro.

[0003] Td is a main pipe to which warm gas or water is supplied, Tu is a main pipe to supply warm gas or water to the boiler, S is a branch pipe connecting the main pipe Td and the main pipe Tu,
On the outer surface of the branch pipe S, fins are provided in the horizontal direction in order to efficiently perform heat exchange. P denotes a scaffolding pipe, which is provided in the width direction between the tube rows formed by the tubes Td, Tu, S and between the tube row and the wall. A manhole is provided between the row of pipes and below the wall corresponding to the gap between the row of pipes and the wall so that people and cleaning equipment can be carried in.

When gas or water is supplied to the inlet Ri of the preheating chamber R while gas or water is being supplied to the main pipe Td of the preheating device thus configured, the gas or water is
It is heated by the heat of the waste gas mainly while moving the branch pipe S from the main pipe Td to the main pipe Tu, and is supplied from the main pipe Tu to the boiler. When used for a long time, soot and scale in the waste gas adhere to or accumulate on the branch pipes S and fins, and the heat exchange rate decreases, so cleaning to remove soot and scale from the branch pipes S etc. There is a need to do.

Therefore, when cleaning is performed, the scaffolding material is carried into the preheating chamber R from the manhole and the scaffolding is assembled using the pipes P. Then, the hose to which the cleaning liquid is sent is placed horizontally with respect to the branch pipe S and the like, and the operation of applying the cleaning liquid to the branch pipe S and the like and rinsing the scale is performed while climbing and descending the scaffold in sequence. Such cleaning work is
Material for cleaning and scaffolding is put in and taken out from the manhole for each tube row.

[0006]

Since the conventional cleaning work is performed with one hand while going up and down the scaffold, uneven cleaning occurs and uniform cleaning cannot be performed, resulting in a large consumption of the cleaning liquid. Since the feet of the worker who has climbed onto the scaffold are unstable, the cleaning liquid is sent at a low pressure so as not to damage the fins of the branch pipe S even if the cleaning liquid is applied to the branch pipe S from a direction other than the horizontal direction. However, the soot and scale cannot be completely removed, and the heat exchange rate decreases due to the sequential deposition, which obstructs the flow of waste gas and increases the power consumption of the exhaust motor. It was Under such circumstances, there is a demand for the development of a cleaning device that can efficiently and safely clean the branch pipe S and the like without damaging the fins.

The present invention has been made in order to meet the above-described demands, and provides a cleaning device capable of efficiently and safely cleaning an object to be cleaned without damaging the fins.

[0008]

A cleaning apparatus according to the present invention comprises a base having two guide rails parallel to each other in the horizontal direction, a movable carriage movable along the two guide rails, and a base. A horizontal feed mechanism that is provided on the base and that can move the movable carriage along the guide rails, a horizontal feed mechanism, a column that is attached to the movable carriage and extends vertically upward, and an ejection hole facing the body to be cleaned. And a vertical feed mechanism that is provided with a vertical drive source on the moving carriage and that moves the nozzle header along the column.

[0009]

In the cleaning device according to the present invention, the moving carriage moves in the horizontal direction along the guide rail by operating the horizontal feed mechanism. Then, by operating the vertical feed mechanism, the nozzle header moves in the vertical direction along the column. Thereby, the object to be cleaned can be efficiently and surely cleaned.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing a configuration of a cleaning apparatus according to an embodiment of the present invention with a part omitted, FIG. 2 is an enlarged plan view taken along the line AA of FIG. 1, and FIG. 3 is a line BB of FIG. FIG. 4 is an enlarged side view of FIG. 4, and FIG. 4 is a right side view of FIG. In addition, in FIG. 1, a part of the front plate of the moving carriage is broken.

In these drawings, reference numeral 11 denotes a base, which is a square pipe 12, and the square pipe 12 and the square pipe 1.
U-shaped mounting plate 13 attached at a predetermined interval so that 2 is located in the center of the inside, and is attached inside the vertical portion of this mounting plate 13 in parallel with the bottom at a predetermined interval in the horizontal direction. The guide pipes 14F and 14B, and the handle 15 that is attachable to and detachable from the left end of the guide pipes 14F and 14B. Therefore, when the handle 15 is detached from the guide pipes 14F and 14B, the guide pipes 14
The left ends of F and 14B are open ends. The base 11
The length in the left-right direction is approximately 2 m.

Reference numeral 21 denotes a moving carriage, which is a box-shaped carriage 22.
And the guide pipe 14 attached to this dolly 22.
Traveling wheels 23FL, 23F traveling on F, 14B
B, 23BL, 23BR and the traveling wheels 23FL, 2
Cart 22 to be paired with 3FB, 23BL, 23BR
The guide pipes 14F and 14B are attached to the traveling wheels 23FL, 23FB and 2 to prevent the cart 22 from falling.
Fall prevention wheel 24F that is clamped together with 3BL and 23BR
L, 24FB, 24BL, 24BR.

Reference numeral 31 denotes a horizontal feed mechanism, which is the base 11
A box-shaped mounting base 32 mounted on the right end of the, an air motor 33 mounted on the mounting base 32, and a mounting base 3
2, a speed reducer 34 attached to the air motor 33, and a sprocket 35 attached to the handle 15.
L and the sprocket 35R attached to the speed reducer 34
And a chain 36 stretched around the sprockets 35L and 35R and both ends of which are detachably attached to the carriage 22.
It consists of and.

Reference numeral 41 designates a column, and as shown in FIG.
A L-steel is attached to the steel to form a box-shaped guide portion, and a lower support column 42 that is vertically attached to the upper surface of the dolly 22,
It is formed in a shape that holds the guide part of this lower strut 42,
An upper strut 43 that moves up and down with respect to the lower strut 42, and an upper strut 4
It is composed of a fixing metal fitting 44 for fixing the lower portion to the lower support column 42 in a state where 3 is moved upward. Reference numeral 51 denotes a nozzle header, in which a plurality of nozzles 52 having ejection holes oriented in the horizontal direction are attached in the horizontal direction, and a hose 53 to which a cleaning liquid is supplied
Are connected.

Reference numeral 61 denotes a vertical feed mechanism, which is an air motor 62 attached to the carriage 22 via a speed reducer 63,
A speed reducer 63 connected to the air motor 62, a sprocket 64 attached to the speed reducer 63, a sprocket 65 attached to the front lower part of the carriage 22, and a chain stretched around the respective sprockets 65, 64. 66
And sprockets 67DL and 67DR coaxially attached to the sprocket 65, and sprockets 67UL and 67UR attached forward of the upper end of the upper support column 43,
A chain 68L stretched around each of the sprockets 67DL and 67UL and attached to the nozzle header 51 at both ends.
And a chain 68R stretched around the sprockets 67DR and 67UR, and both ends of which are attached to the nozzle header 51.
It consists of and. The nozzle header 51 is horizontally supported by the chains 68L and 68R. The height to the upper end of the column 41 is about 4.5 m from the lower end of the base 11.

FIG. 5 is a block diagram showing an air supply circuit. For convenience of explanation, the support columns 41 to the vertical feed mechanism 61 are illustrated in a state of being rotated by 90 degrees. In FIG. 5, 71 is a coupler connecting air hoses to each other, 72 is an auto drain connected to one side of the coupler 71, 73 is a pressure regulator connected to the auto drain 72, and 74 is connected to a pressure regulator 73. A pressure gauge, 75 is a lubricator connected to the pressure regulator 73.

Reference numeral 76 denotes a three-way valve having an input port connected to the lubricator 75. When the manual side is switched, the input port is connected to the first output port, and when the automatic side is switched, the input port is the second output port. Is connected to. Reference numeral 77 denotes a manual valve whose input side is connected to the first output port of the three-way valve 76, and whose output side is connected to the air motor 33 of the horizontal feed mechanism 31.

Reference numeral 78 denotes a first interval timer, which outputs a start signal every time a set time for operating the horizontal feed mechanism 31 has elapsed. Reference numeral 79 denotes a start-up timer, which outputs the start-up signal only for the time for moving the moving carriage 21 by the air motor 33 by the width of the plurality of nozzles 52 each time the start-up signal is supplied from the first interval timer 78, for example, 5 seconds. Is. Reference numeral 80 denotes an auto valve in which the input side is connected to the second output port of the three-way valve 76, and the second output port of the three-way valve 76 is connected to the input side of the manual valve 77 only while the start signal is supplied from the start timer 79. To connect.

Reference numeral 81 denotes a switching valve whose input side is connected to the lubricator 75, and whose output side is connected to the air motor 62 of the vertical feed mechanism 61. Normally, the air motor 6 is used.
2 is rotated so as to rotate upward. 8
Reference numeral 2 denotes an upper limit detection valve whose input side is connected to the lubricator 75, and the switching valve 8 is provided only while being pressed by the pressing piece 69 provided on one of the chains 68L and 68R.
Air for switching 1 to the descending side is output to the switching valve 81.

Reference numeral 83 denotes a lower limit detection valve whose input side is connected to the output side of the upper limit detection valve 82, and the nozzle header 5
Only while being pressed by 1, the air is switched to be discharged to the atmosphere. 84 is an upper limit detection valve 82
Shows a pressure detection switch connected to the output side of the, and when it detects substantially atmospheric pressure, it outputs a rising signal to turn on the rising lamp 85U, and when it detects a predetermined pressure higher than atmospheric pressure, it outputs a falling signal. The descending lamp 85D is turned on.

Reference numeral 86 denotes a second interval timer, and when a down signal is supplied from the pressure detection switch 84, the time taken for the nozzle header 51 to move from the upper limit to the lower limit,
For example, the start signal is output only for a set time of 5 seconds to 10 seconds. Reference numeral 87 denotes a replenishment valve, which supplies air from the lubricator 75 to the system on the output side of the upper limit detection valve 82 only while the activation signal is being supplied from the second interval timer 86. Even if air leaks, each part is supplied. To operate normally. The portion surrounded by the alternate long and short dash line is arranged on the control panel arranged outside the preheating chamber R.

Next, disassembly and assembly will be described. First, in the state shown in FIGS. 1 and 2, the chain 36
After detaching both ends of the handle from the carriage 22, the handle 15 is moved to the left and pulled out from the guide pipes 14F and 14B. When the carriage 22 is moved leftward along the guide pipes 14F and 14B, the wheels 23FL and 23F are moved.
R, 23BL, 23BR and wheels 24FL, 24F
R, 24BL, 24BR and guide pipes 14F, 14
The engagement with B is released, and the moving carriage 21 and the like are moved to the base 11
Can be separated (decomposed) from.

As described above, when the base stand 11 and the moving carriage 21 are disassembled, the disassembled two parts become elongated rod shapes, so that the manhole can be freely taken in and out of the preheating chamber R and easily. You can Since the length of the support column 41 can be contracted in a telescopic manner by removing the fixing bracket 44, contracting the support column 41 makes it easier to move the manhole into and out of the preheating chamber R. The assembly in the preheating chamber R can be carried out in the procedure opposite to the disassembling procedure, but the support column 41 is laid sideways and fixed in an extended state, or extended using a pipe P or the like in a standing state. Fix it in the state where it was made.

Next, the operation will be described. First, the cleaning device is assembled in the preheating chamber R, the base 11 is arranged in parallel with the tube row, and the coupler 71 is connected with the nozzle 52 facing the branch pipe S and the like. Then, the operation button of the control panel arranged outside the preheating chamber R is operated to switch the three-way valve 76 to the manual side, and the manual valve 77 is switched to the stop position to enter the cleaning standby state.

When the cleaning standby state is set in this manner, air is supplied from the air source and air is supplied from the lubricator 75 to the switching valve 81, so that the air motor 6
Since 2 rotates in the direction of raising the nozzle header 51, the nozzle header 51 starts to rise. At this time, since the pressure on the output side of the upper limit detection valve 82 is substantially atmospheric pressure, the pressure detection switch 84 outputs a rising signal to turn on the rising lamp 85U.

When the nozzle header 51 reaches the upper limit position, the pressing piece 69 presses the upper limit detection valve 82, and the air from the lubricator 75 is supplied to the output side of the upper limit detection valve 82. The air motor 62 is rotated in the direction of lowering 81 to lower the nozzle header 51, and the pressure detection switch 84 detects a predetermined pressure and outputs a lowering signal to turn on the lowering lamp 85D.

At this time, the second interval timer 86 outputs a start signal in response to the descending signal to open the auxiliary valve 87, so that air is supplied from the lubricator 75 to the output side of the upper limit detection valve 82 and the pressing piece 69 is pushed. Even if the upper limit detection valve 82 is no longer pressed, each part maintains its state. However, since the second interval timer 86 stops outputting the start signal before the nozzle header 51 reaches the lower limit position, the auxiliary valve 87 is closed, and air is output from the lubricator 75 to the output side of the upper limit detection valve 82. Will not be supplied.

When the nozzle header 51 reaches the lower limit position, the nozzle header 51 presses the lower limit detection valve 83, and the air on the output side of the upper limit detection valve 82 is discharged from the lower limit detection valve 83 to the atmosphere. The switching valve 81 is switched to the rising side and the air motor 62 rotates in a direction to raise the nozzle header 51, and the pressure detection switch 84 detects substantially atmospheric pressure and outputs a rising signal, thereby turning on the rising lamp 85U. Let Therefore,
By setting the nozzle 52 in the cleaning standby state, the nozzle 52 maintains the parallel state with the fins of the branch pipe S and repeats the raising and lowering together with the nozzle header 51.

In this state, when the operation button of the control panel is operated to start the cleaning, the hose 53 is moved to the nozzle header 5
Since the cleaning liquid is supplied to No. 1, the cleaning liquid is blown out from the plurality of nozzles 52 in parallel with the fins of the branch pipe S to start cleaning. Then, it is confirmed how many strokes the nozzle header 51 can be completely cleaned by setting the stroke of the nozzle header 51 ascending or descending as one stroke, and the first interval timer 78 is set to a time several seconds longer than the stroke time of the complete cleaning.

Next, when the operation button of the control panel is operated to switch the three-way valve 76 to the automatic side to set the automatic mode, the first
Each time the interval timer 78 outputs a start signal, the start timer 79 outputs a start signal for 5 seconds to switch the auto valve 80, so that air is supplied from the auto valve 80 to the input side of the manual valve 77 for 5 seconds. .

Therefore, when the operation button of the control panel is operated to switch the manual valve 77 to the forward side to set the forward mode, the air motor 33 moves the moving carriage 21 forward (to the left in FIGS. 1 and 2). Since it rotates, the movable carriage 21 moves forward intermittently by a predetermined distance. Then, when the cleaning of the moving range of the movable carriage 21 is completed, the cleaning device is moved to each mode in the stop mode, and the manual valve 77 is switched to the backward side by operating the operation button of the control panel to set the backward mode. 21 intermittently retracts by a predetermined distance (to the right in FIGS. 1 and 2).

Further, when the operation button of the control panel is operated to switch the three-way valve 76 to the manual side and the manual mode is set, the timers 78 and 79 do not output the start signal. Therefore, operate the operation button on the control panel to operate the manual valve 7
When 7 is set to the forward mode or the backward mode, the moving carriage 21 moves forward or backward only during the mode.

When the moving carriage 21 reaches the left end or the right end of the base 11, the horizontal drive source is the air motor 33, so there is no danger of damaging each part. No switches are provided. However, when the left and right limit switches are arranged in consideration of further safety, the valves are arranged as the left and right limit switches, and the left or right valves are arranged like the upper and lower detection valves 82 and 83. When pressed, air may not be supplied to the input side of the manual valve 77.

As described above, the nozzle 52 is attached to the branch pipe S or the like.
Since the cleaning liquid can be uniformly sprayed by spraying the cleaning liquid with a high pressure jet, the cleaning liquid can be used without waste and the branch pipe S and the like can be efficiently cleaned deeply. And
Since the cleaning liquid is sprayed from the nozzle 52 in parallel with the fins of the branch pipe S, the fins are not damaged. Further, since the work on the scaffold is eliminated, the cleaning work can be safely performed. Further, since the electric system is provided on the control panel and arranged outside the preheating chamber R, the preheating chamber R does not have the electric system, so that it is possible to ensure safety in work.

[0035]

As described above, according to the present invention, since the cleaning liquid can be uniformly sprayed onto the object to be cleaned from the nozzle by the high pressure jet, the object to be cleaned can be efficiently used without wasting the cleaning liquid. Can be washed deeply. Since the cleaning liquid is sprayed from the nozzle in parallel with the fins of the object to be cleaned, the fins are not damaged. Further, since the work on the scaffold is eliminated, the cleaning work can be safely performed.

[Brief description of drawings]

FIG. 1 is a partially omitted front view showing the configuration of a cleaning device according to an embodiment of the present invention.

FIG. 2 is an enlarged plan view taken along the line AA of FIG.

FIG. 3 is an enlarged side view taken along line BB of FIG.

FIG. 4 is a right side view of FIG. 3 in which a rear plate of the movable carriage is omitted.

FIG. 5 is a block diagram showing an air supply circuit.

FIG. 6 is a schematic diagram showing a configuration of a preheating device using waste gas.

[Explanation of symbols]

11 Base stand 14F, 14B Guide pipe 21 Moving carriage 23FL, 23FR, 23BL, 23BR Traveling wheel 24FL, 24FR, 24BL, 24BR Fall prevention wheel 31 Horizontal feed mechanism 33 Air motor 35L, 35R Sprocket 36 Chain 41 Strut 51 Nozzle header 52 Nozzle 61 Vertical feed mechanism 62 Air motor 64, 65 Sprocket 66 Chain 67DL, 67DR, 67UL, 67UR Sprocket 68L, 68R Chain R Preheating chamber Td, Tu Main pipe S Branch pipe

Claims (1)

[Claims] 1. A base pedestal having two guide rails parallel to a horizontal direction, a movable carriage movable along the two guide rails, and a movable trolley provided on the base pedestal. A horizontal feed mechanism composed of a horizontal drive source movable along the guide rail; a pillar attached to the movable carriage and extending vertically upward; and a nozzle having an ejection hole directed to the object to be cleaned, A cleaning device comprising: a nozzle header that is moved vertically along the support column; and a vertical feed mechanism that is provided with a vertical drive source on the moving carriage and moves the nozzle header along the support column.