JPH0243997B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an automatic cleaning device for cleaning thin tubes in heat exchangers such as condensers used in thermal power plants and nuclear power plants.

[Technical background of the invention and its problems]

In general, condensers for turbines installed in thermal power plants and nuclear power plants are periodically cleaned of limescale adhering to the inside of the tubes in order to maintain heat exchange efficiency.

That is, the above-mentioned condenser will be explained with reference to FIG. 1. A pair of pipe plates (also referred to as pipe plates) are provided at both ends of a body a which is provided with a steam supply port _A1 and a steam discharge port _A2 . b
A large number of thin tubes c are arranged in parallel on the body a located between the two pipe board b, and each water chamber d, e is provided in the body a located on the outside of the pipe board b. It is constructed by attaching double-sided chamber casings f and g that form a water supply port f ₁ and a water drain port g ₂ in a part of the both-side chamber casings f and g.

Therefore, the above-mentioned condenser allows cooling water to flow from the water supply port _f1 through the water chamber d into each capillary tube,
Furthermore, the steam is discharged through another water chamber e to the drain port _g2 , and on the other hand, the steam that has finished its work is sent to the above-mentioned supply port.
The steam is supplied to the body a from _a1 , where the steam and cooling water exchange heat to generate condensate for the boiler, which is taken out from the outlet _a2 .

To clean the thin tubes c in such a condenser, first close the seawater intake valves (cooling water intake valves) leading to each water chamber d and e, and then the inspection worker barely manages to get in and out. The above-mentioned side chamber casing g with a diameter of
Scaffolding materials are carried into the water chamber e from the manhole j, and the scaffold is assembled near the pipe board b,
Thereafter, as shown in Figure 2, five to six workers insert a cleaning bullet h into each capillary tube c, and use the spray nozzle _i1 of the hydraulic gun i to spray pressure water onto it. A cleaning bullet h is then passed through the inside of each capillary tube c together with this pressurized water, thereby peeling off and cleaning limescale adhering to the inside of each capillary tube c.

However, even if the manhole j of the side chamber casing g is open, the cleaning device described above requires multiple people to work inside the water chamber e, which is nearly sealed. If a third party inadvertently opens the seawater intake valve, a large amount of high-pressure water will flow into the water chamber e within a short period of time, posing not only a safety problem for the workers, but also Inside the water room e, a large amount of seaweed and shellfish adheres to the walls and is corroded, so the odor generated by them significantly deteriorates the working environment and poses problems in terms of occupational safety and health. Furthermore, in the case of manual work, inserting cleaning bullets h into tens of thousands of thin tubes c and sequentially cleaning them with a water pressure gun i causes severe worker fatigue and reduces the efficiency of cleaning work. There are drawbacks.

[Purpose of the invention]

In order to eliminate the above-mentioned drawbacks, the present invention provides a cleaning device for a condenser equipped with a large number of thin tubes, which moves intermittently in the horizontal direction while self-propelled along the header plate of the condenser. To provide a cleaning device which is capable of efficiently and safely cleaning the inside of each capillary with scale attached by firing a cleaning bullet with a cleaning bullet firing device.

[Summary of the invention]

The present invention provides a cleaning device for a heat exchanger equipped with a large number of thin tubes, in which chucking devices are provided at both ends of a horizontal guide rail so as to be temporarily inserted into the thin tubes and self-retained, and the guide rails are self-retained. A lifting device with a cylinder device is installed in the middle of the rail,
A slide member is slidably provided on the support of the lifting device, and each chucking device is provided at both ends of the slide member by being temporarily inserted into the thin tube, and the cleaning bullet firing device is intermittently sent to the guide rail. It is constructed so that it can be moved while moving.

[Embodiments of the invention]

Hereinafter, an illustrated embodiment in which the present invention is applied to a condenser will be described.

Note that the present invention will be described with the same reference numerals attached to the same constituent members as those of the conventional example described above.

In FIGS. 1 and 3, reference numeral b denotes a pair of header plates formed at both ends of the body a of the condenser, and the inside of the body a located between the two header plates b. A large number of thin tubes c for heat exchange are arranged in parallel, and the body a located on the outside of the tube board b has double-sided chamber housings f, forming each water chamber de.
g is attached.

On the other hand, as shown in FIGS. 1, 3, and 8, the area near the pipe board b in the side chamber casing g is shaped like a flat plate, and tapered portions 1a are provided at both ends thereof. The formed guide rail 1 is arranged horizontally, and a rack 2 is attached to the upper surface of the guide rail 1 over the entire length of the guide rail 1. Furthermore, as shown in FIG. 4, a pair of chucking devices 3 are provided at both ends 1b of the guide rail 1 so as to be temporarily inserted into the opening of the thin tube c and self-retained. .

(1) Chucking device In FIGS. 3 and 4, reference numeral 4 denotes a flat board (base) fixed to one end of the rail 1 with each mounting bolt, and the back side of this board 4 has the following parts: For example, a sliding groove 4 with a dovetail groove formed thereon.
A first cylinder device 5, such as an air cylinder operated by pneumatic pressure, is provided on the back surface of the substrate 4 near the sliding groove 4a. Further, on the output shaft 5a of the first cylinder device 5, one end portion 6 of a slide member 6 is slidably fitted into the slide groove 4a.
A is connected to the slide member 6, and the other end 6b of the slide member 6 is provided with a chuck member 7 that fits into the opening of the thin tube c. Furthermore, a second cylinder device 8 such as an air cylinder is installed on the back side of the slide member 6, and an output shaft 8a of the second cylinder device 8 has a tapered wedge for expanding the chuck member 7. The rods 9 are connected by locking pins 10.

As described above, both chucking devices 3 are provided at both ends of the rail 1, and both chucking devices 3 are self-retained in the thin tube c at the same time.

That is, when the first cylinder device 5 operates, the slide member 6 connected to the first cylinder device 5 slides to the left in FIG. 4. Then, the chuck member 7 attached to the other end 6b of the slide member 6 fits into the opening of the thin tube c, and comes into contact with the surface of the header plate b and stops.

Next, by operating the second cylinder device 8, the taper wedge 9 connected to the second cylinder device 8 is pulled to the right in FIG. The chuck member 7 is expanded by the portion 9a so that the chuck member 7 is inserted into the inner circumferential surface of the thin tube c in close contact.

On the other hand, in the middle of the guide rail, there is a lifting device (lifting device) 11 equipped with a cylinder device.
As shown in FIGS. 3 and 5, it is installed so that it can be raised and lowered along the pipe board b, like an inchworm.

(2) Elevating device In FIGS. 3 and 5, a pair of guide supports 12 are located at the middle upper surface of the guide rail 1.
are erected, and a lower limit stopper 13a and an upper limit stopper 13b are attached to the upper part of each guide rod 12, respectively. Further, on the guide rail 1 surrounded by each of the guide rods 12, a cylinder device 14, such as an air cylinder, is erected vertically, and an output shaft 14a of the cylinder device 14 is provided with an output shaft 14a. The center portion of the channel-shaped support 15 is fixed. Moreover, both sides of this support body 15 are
It is fitted between the upper and lower limit stoppers 13a and 13b so as to be able to move up and down on each of the guide supports 12.

Therefore, the support body 15 in the lifting device 11 is moved between the lower limit stopper 13a and the upper limit stopper 13 by the cylinder device 14.
It is designed to move up and down between the

On the other hand, each square hole 16 is bored in both ends 15a of the support body 15 in the lifting device 11, and a slide member 17 having a rectangular cross section is slid horizontally into both square holes 16. As shown in FIG. 6, chucking devices 18 having the same structure as the chucking devices 3 described above are mounted on both ends 17a and 17b of the slide member 17, as shown in FIG. It is provided so that it can be temporarily inserted into the opening of the housing and self-retained. Moreover, the slide member 17
A cylinder device 19, such as an air cylinder, for example, is attached to the back side of the central part of the cylinder device 19, and both rods 19 of this cylinder device 19
a and 19b are fixed to both ends 15a of the support 15.

Therefore, by driving the cylinder device 19, the slide member 17, which is integrated with the cylinder 19c of the cylinder device 19,
It is designed to be able to slide to the right or left.

(3) Chucking device In FIG. 6, flat substrates 20 are fixed to both ends of the slide member 17 with, for example, mounting bolts. A sliding groove 20a is formed. Also, this sliding groove 20
A third cylinder device 21 including an air cylinder is provided on the outer surface of the substrate 20 near point a, and an output shaft 21a of the third cylinder device 21 has a slide fitted in the sliding groove 20a. Members 22 are connected. moreover,
A chuck member 23 that fits into the opening of the thin tube c is attached to one end of the slide member 22, and a fourth cylinder device 24, such as an air cylinder, is attached to the outer surface of the slide member 22. is set up. Furthermore, the fourth
The output shaft 24a of the cylinder device 24 has a tapered wedge 25 for expanding the chuck member 23.
are connected.

Therefore, by operating the third cylinder device 21, this third cylinder device 21
A slide member 22 connected to slides upward in FIG. Then, the chuck member 23 attached to the tip of this slide member 22
fits into the opening of the capillary c, and also comes into contact with the wall surface of the tube board b and stops. Next, by operating the fourth cylinder device 24,
The taper wedge 25 connected to the fourth cylinder device 24 is pulled downward as shown in FIG.
The cone portion 5 expands the chuck member 23 so that the chuck member 23 is inserted into the inner peripheral surface of the thin tube c in close contact.

In this way, both the above-mentioned chucking devices 18
are temporarily inserted into each of the thin tubes c, so that the entire device is self-supported, and by driving the cylinder 14 of the lifting device 11, the guide rail 1 etc. is moved to the tube board b. It is designed to be able to move up and down relatively along the line.

(4) Cleaning bullet firing device (cleaning head) In Figures 3 and 7 to 9, on the guide rail 1 and rack 2 is a cleaning bullet firing device (also referred to as a cleaning head) that moves intermittently. 26 is provided so as to be freely movable.

In FIGS. 7 to 9, reference numeral 27 is a movable frame body, and a pair of front and rear ear pieces 27a and 27b are provided on both sides of the movable frame body 27. On the inner side of each ear piece 27a, 27b, a pair of upper and lower rolling rollers 28a, 28b each having a truncated cone shape is provided at each tapered portion 1a formed on both side edges of the guide rail 1.
It is provided so that it rolls in contact with the. Further, a bracket 29 is firmly erected on the upper surface of the movable frame 27 located between the ear pieces 27a and 27b by respective mounting bolts, and a pulse motor 3 is mounted on this bracket 29.
0 is installed horizontally. Further, a pinion 31 mounted on the output shaft of the pulse motor 30 is meshed with the rack 2, and when the pinion 31 rotates, the movable frame 27, which is integral with the bracket 29, moves towards the guide rail 1. It is designed to move to the right or left as guided by. Furthermore, on the back surface of the movable frame 27 located below the ear piece 27a, a fifth cylinder device 32, such as an air cylinder, is arranged to face the opening of the thin tube c of the header plate b. This fifth
A hydraulic gun 33 is connected to the output shaft 32a of the cylinder device 32.

On the other hand, a sliding groove 27a such as a dovetail groove, for example, is provided on the back surface of the movable frame 27 located directly above the water pressure gun 33. A portion is slidably fitted. In addition, the water pressure gun 33
There is a truncated conical injection nozzle 33 at the tip of the
A is provided so as to be able to fire a cleaning bullet 34 from a brush cartridge loaded in the thin tube c, and the pressure fluid of the water pressure gun 33 is supplied from a water pressure hose 33b.

On the other hand, as shown in FIGS. 7 and 9, on the back surface of the movable frame 27 located below the ear piece 27b, a sixth cylinder device 35, such as an air cylinder, is installed to connect the water pressure gun. 3
A push rod 36 is attached to the free end of the output shaft 35a of the sixth cylinder device 35 via a connecting rod 35b, parallel to the output shaft 35a. Also, the movable frame 2 located at the free end of this push rod 36
7 has a discharge port 37 for storing the cleaning bullet 34.
A cartridge (armour) 37 equipped with
It is located in a straight line with a, and the above cleaning bullet 3
4 is pushed out from the discharge port 37a by the push rod 36 and inserted into the thin tube c. Further, the injection nozzle 33a and the discharge port 37a are spaced apart from each other by one pitch p of each thin tube c. Furthermore, the push rod 36
A supply tube 38 for the cleaning bullet 34 is attached to the cartridge 37 near the push rod 36, and a flexible bullet feed tube 39 is connected to the supply tube 38. .

Therefore, when operating the cleaning bullet firing device 26, first align the injection nozzle 33a and the discharge port 37a of the water pressure gun 33 so as to face the openings of the respective thin tubes c of the header plate b, and then When the sixth cylinder device 35 is driven, the push rod 36 integrated with the output shaft 35a of the sixth cylinder device 35 moves the cleaning bullet 34 inside the cartridge 37.
is delivered from the discharge port 37a to the opening of the thin tube c. Then, in conjunction with the return operation of the sixth cylinder device 35, the pulse motor 30 shown in FIGS. 7 and 8 is driven for a certain period of time and then stopped. In other words, it moves by one pitch of the thin tube c and then stops. Then, the injection nozzle 33a of the water pressure gun 33 moves to the opening of the thin tube c where the discharge port 37a is located.
As a result, the injection nozzle 33a is fitted into the opening of the thin tube c, and a trigger (not shown) of the water pressure gun 33 is activated to direct pressure fluid from the injection nozzle 33a into the thin tube c.
4, so seaweed, shellfish, limescale, etc. adhering to the inside of the capillary tube c are cleaned all at once.

(5) Cleaning bullet supply device In FIGS. 1, 10, and 11, one end of the bullet feeding tube 39 connected to the cartridge 37 of the cleaning bullet firing device 26 via the supply tube 38 has a A cleaning bullet supply device 40 is installed through a manhole j in a side chamber casing g of the condenser.

That is, in FIGS. 10 and 11, the upper part 41a of the pedestal 41 that is inclined like a slide has an inclined gutter body 42 that accommodates a large number of cleaning bullets 34.
is installed obliquely, and a swinging cylinder device 43 is provided below the lower end 42a of this inclined gutter body 42.
A swinging lever 45 having a pair of elongated holes 44a and 44b is mounted on the output shaft. In addition, a pair of seesaw rods 46a, 46b are guided by a guide member 47 in both elongated holes 44a, 44b, and protrude alternately onto the path of the cleaning bullets 34 of the slanted gutter body 42 so as to pass the cleaning bullets. 34 is intermittently supplied one by one, and when the seesaw rods 46a, 46b make one reciprocation, only one cleaning bullet 34 is released. Furthermore, the above seesaw rod 46
A mounting bracket 48 is attached to one side of the pedestal 41 below the frame 41. As shown in FIG. Added to that. Furthermore, a brush holder 50 having a substantially U-shaped cross section is attached to the mounting bracket 48 located at the front end of the output shaft 49a of the cylinder device 49. , to which the bullet feed pipe 39 is connected.

Therefore, by driving the swing cylinder device 43, the cleaning bullet supply device 40 can:
Since the swinging lever 45 that is integrated with the output shaft of the swinging cylinder device 43 makes one reciprocation, both seesaw rods 46a and 46b that are engaged with the long holes 44a and 44b of the swinging lever 45 are connected to the inclined gutter. body 42
makes one reciprocating motion orthogonal to the As a result, the cleaning bullets 34 in the inclined gutter body 42 are rolled one by one by their own weight and are moved to the brush holder 5 one by one.
0. Then, the cylinder device 49 releases the cleaning bullet 34 in the brush holder 50.
is supplied to the bullet feed tube 39.

Therefore, each cleaning bullet 34 in the bullet feed pipe 39
As shown in FIG. 9, the cleaning bullet is transported to a cartridge 37 of the cleaning bullet firing device 26.

Hereinafter, the effects of the present invention will be explained.

In FIG. 1, after completely draining the water in the condenser, the cleaning projectile firing device 26 of this embodiment is carried in from the manhole j of the side chamber g, and the cleaning projectile firing device 26 of this embodiment is inserted into the pipe located at the opening of the thin tube c. The cartridge 37 of the cleaning bullet firing device 26 is installed along the board b.
A cleaning bullet supply device 40 installed on the outside of the manhole j is connected through the bullet feed pipe 39 for the cleaning bullets 34.

Next, as shown in FIGS. 3 to 6, both chucking devices 3 provided at both ends 1b of the guide rail 1 and both chucking devices 18 connected to the lifting device 11 are activated. , Figure 13A
As shown in , it is installed so as to be temporarily inserted into each predetermined capillary tube c and self-retained.

That is, first, both the chucking devices 3 are driven as shown in FIGS. 4 and 12, and the entire device is inserted into each of the predetermined thin tubes c and self-retained. That is, when the first cylinder device 5 of the upper and both chuck devices 3 is activated, the slide member 6 connected to the first cylinder device 5 slides to the left as shown in FIGS. 4 and 12. do. Then, the chuck member 7 attached to the other end 6b of the slide member 6 fits into the opening of the capillary tube c and comes into contact with the header plate b and stops. Then, by operating the second cylinder device 8, the taper wedge 9 connected to the second cylinder device 8 moves as shown in FIG.
By being drawn to the right, the cone portion 9a of the tapered wedge 9 expands the chuck member 7, and the chuck member 7 is tightly inserted into the inner peripheral surface of the thin tube c.

Next, as shown in FIGS. 5 and 6, the cylinder device 14 in the lifting device 11 lifts up the channel-shaped support 15 along each guide rod 12 (13th (See Figure B). Further, a slide member 17 mounted horizontally on both ends of this support body 15 is configured to temporarily insert both chucking devices 18 provided at both ends of this slide member 17 into each of the thin tubes c. Then, the cylinder 19c of the cylinder device 19 slides to the right or left for positioning.

Once the insertion positions of both chucking devices 18 have been determined, they are temporarily inserted into predetermined thin tubes c and self-retained in the same manner as both chucking devices 3 described above.

That is, in FIG. 6, when the third cylinder device 21 operates, the third cylinder device 2
1 slides upward in FIG.
A chuck member 23 attached to the tip of the tube 2 fits into the opening of the thin tube c, and comes into contact with the tube header b and stops. Next, the fourth cylinder device 24
When activated, the taper wedge 25 connected to the fourth cylinder device 24 moves as shown in FIG.
By being drawn downward, the cone portion of the tapered wedge 25 engages with the chuck member 23.
is expanded, and this chuck member 23 is inserted into the capillary tube c.
It is inserted in close contact with the inner circumferential surface of the

In this way, the chuck members 7 and 23 are
The lower pair of chucking devices 3 and 18 temporarily insert the tube into each capillary tube c, and the entire device is self-supported.

Next, as shown in FIGS. 3 and 7 to 9, the cleaning bullet firing device 26 is moved to one side of the guide rail 1 in advance.

On the other hand, by driving the cleaning bullet supply device 40 shown in FIGS. 10 and 11, the cleaning bullets 34 are supplied one by one to the cartridge 37 of the cleaning bullet firing device 26.

That is, when the swinging cylinder device 43 is driven, the swinging lever 45, which is integral with the output shaft of the swinging cylinder device 43, makes one reciprocating motion, so that the swinging lever 45 engages with the elongated holes 44a and 44b. Both seesaw rods 46a and 46b move back and forth once perpendicularly to the inclined gutter body 42. As a result, the cleaning bullets 34 of the inclined gutter body 42 fall into the brush holder 50 while rolling under their own weight. Then, the cylinder device 49 sequentially transports the cleaning bullets 34 in the brush holder 50 into the cartridge 37 through the bullet feed pipe 39 and the supply cylinder 38.
Supply one by one.

On the other hand, the cleaning bullet firing device 26 operates in conjunction with the cleaning bullet supply device 40.

That is, in FIGS. 7 to 9, the cleaning bullet firing device 26 drives the pulse motor 30 in advance so that the pinion 31 of the pulse motor 30 engages with the rack 2 of the guide rail 1. The movable frame 27 is moved to a predetermined position relative to the moving frame 27, thereby standing by in a state facing the opening of each capillary tube c of the tube head plate b. In this way, the injection nozzle 33a of the water pressure gun 33
After making the discharge ports 37a face each other, the sixth cylinder device 35 is driven. Then, the push rod 3 integrated with the output shaft 35a of this sixth cylinder device 35
6 sends out the cleaning bullet 34 in the cartridge 37 from the discharge port 37a to the opening of the thin tube c. Then, in conjunction with the return operation of the sixth cylinder device 5, the pulse motor 30 moves by one pitch of the capillary tube c and stops, so that the water pressure gun is inserted into the opening of the capillary tube c where the discharge port 37a is located. Since the injection nozzle 33a of 33 moves, the water pressure gun 33 is thereby fitted into the opening of the thin tube c by the fifth cylinder device 32, and the water pressure gun 33 is fitted into the opening of the thin tube c. By actuating the trigger, the pressure fluid is ejected from the injection nozzle 33a into the capillary tube c, together with the cleaning bullet 34.
Seaweed, shellfish, limescale, etc. adhering to the interior of the tank are now cleaned all at once.

In this way, as shown in FIG. 13B, each of the horizontal thin tubes c located side by side on the pipe board b is connected to the cleaning bullet 3 of the cleaning bullet firing device 26.
4 are cleaned in sequence.

In this way, when the cleaning work of each horizontal thin tube c in FIG. 13B is completed, the cleaning bullet firing device 26, together with the guide rail 1, is moved as shown in FIGS. 3 and 5, as shown in FIG. 13C. As shown in FIG. 2, the cylinder device 14 of the lifting device 11 lifts up one step like an inchworm until it reaches the upper tube c, which has been cleaned, and then stops.

The lifting operation of the lifting device 11 is performed after both chucking devices 3 installed at both ends of the guide rail 1 are released.

As described above, both of the above-mentioned chucking devices 3 are designed to be self-retained by inserting the entire device into each predetermined thin tube c.

In this way, the automatic cleaning device according to the present invention
The insides of a large number of thin tubes c in the condenser are sequentially cleaned.

Incidentally, the automatic cleaning device of the present invention includes a microcomputer-based control device (not shown) provided on the outside of the manhole j in the condenser, the chucking devices 3 and 18, the lifting device 11, and the cleaning bullet. The firing devices 26 are automatically controlled and driven by actuation sensors (not shown) attached to each firing device 26.

Next, in another embodiment of the present invention shown in FIG.
A water pressure gun 33 equipped with a water pressure gun 33 is arranged in parallel, thereby improving the efficiency of cleaning work.

On the other hand, as shown by the chain line in FIG. 3, a plurality of cleaning bullet launchers 26 are provided on the guide rail 1,
Of course, this may be used to improve the efficiency of the cleaning work. Furthermore, the present invention may be used for cleaning other heat exchangers instead of condensers.

〔Effect of the invention〕

As described above, according to the present invention, in a cleaning device for a washer of a heat exchanger equipped with a large number of thin tubes c, each chucking device 3 is temporarily connected to the thin tube c at both ends 1b of the horizontal guide rail 1. A lifting device 11 is provided so as to be inserted into the guide rail 1 and self-retained, and is provided with a cylinder device 14 in the middle of the guide rail 1.
A slide member 17 is slidably provided on the support body 15 of the lifting device 11, and each chucking device 18 is provided at both ends of the slide member 17 by being temporarily inserted into the thin tube c. Since the cleaning bullet firing device 26 is installed on the guide rail 1 so as to be moved intermittently, it is possible to not only efficiently clean the thin tube c, etc. without incorporating a scaffold, but also to automatically operate the cleaning device. Because it is done manually, there is no manual work inside the water chamber.
In addition to improving safety in bad working environments due to odors and oxygen deficiency, it also has excellent effects such as being able to be carried freely through manholes because it is small and lightweight.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a condenser incorporating an automatic cleaning device according to the present invention, FIG. 2 is a side view of an already proposed manual cleaning device, and FIG. 3 is an automatic cleaning device according to the present invention. 4 is a front view of the device, FIG. 4 is a side view of the chucking device incorporated in the present invention, FIG. 5 is a front view of the lifting device incorporated in the present invention, and FIG. 6 is a front view of the device.
The figures are a plan view of FIG. 5, FIG. 7 is a front view of the cleaning bullet launcher used in the present invention, FIG. 8 is a side view of the same, FIG. 9 is a plan view of the same, and FIG. 1 is a side view of the cleaning bullet supply device incorporated in the present invention, the first
1 is an enlarged sectional view taken along the chain line A-A in FIG. 10, FIG. 12 is a diagram for explaining the operation of the above-mentioned chucking device, and FIG. 13 A, B, and C are views showing the operation of the present invention. FIG. 14 is a diagram for explaining another embodiment of the present invention. 1... Guide rail, 3... Chatting device,
DESCRIPTION OF SYMBOLS 11... Lifting device, 15... Support body, 17... Slide member, 18... Chucking device, 26...
...Cleaning bullet launcher, 40...Cleaning bullet supply device.

Claims (1)

[Scope of Claims] 1. In a cleaning device for a heat exchanger equipped with a large number of thin tubes, chucking devices are provided at both ends of a horizontal guide rail so as to be temporarily inserted into the thin tubes and self-retained. , a lifting device equipped with a cylinder device is installed in the middle of the guide rail, and a sliding member is slidably provided on the support of the lifting device,
Each chucking device is provided at both ends of the slide member by being temporarily inserted into the thin tube, and the cleaning bullet firing device is provided on the guide rail so as to be moved intermittently, and the cleaning bullet firing device is provided with a chucking device that is temporarily inserted into the thin tube. An automatic cleaning device characterized in that a cleaning bullet supply device is connected via a feed pipe. 2. The automatic cleaning device according to claim 1, characterized in that each water pressure gun having a plurality of injection nozzles is arranged in parallel to the cleaning bullet firing device. 3. Claim 1 or 2, characterized in that a plurality of cleaning bullet launchers are provided on the guide rail.
Automatic cleaning device as described in section.