JP2719107B2 - High pressure water injection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-pressure water injection device for cleaning an inner surface of a heat exchange tube of a multi-tube heat exchanger such as a boiler.

[0002]

2. Description of the Related Art Conventionally, as an example of a high-pressure water injection device for cleaning the inner surface of a heat exchange tube of a multi-tube heat exchanger such as a boiler, a hose is wound around a rotating drum and a base end portion of the hose. A high-pressure water supply pump is connected to the hose, and a high-pressure water injection nozzle is connected to the tip of the hose. By feeding the hose from the rotating drum, the nozzle is inserted into the heat exchange tube, The deposits deposited on the inner surface of the pipe are crushed and washed by high-pressure water injected from the nozzle, and after the washing is completed, a hose is wound around a rotating drum and the nozzle is pulled out of the pipe. The inner surface of the replacement tube is sequentially washed.

[0003]

In the above-mentioned conventional high-pressure water injection device, since the operation of inserting and extracting the high-pressure water injection nozzle is performed manually, there is a possibility that the worker may be injured by coming into contact with the high-pressure water. Was extremely dangerous.

[0004] In view of the above drawbacks, an object of the present invention is to provide a high-pressure water injection device capable of safely cleaning the inner surface of a heat exchange tube.

[0005]

The structure of the present invention for achieving the above object will be described with reference to the drawings corresponding to the embodiments. A hose 3 is wound around a rotary drum 2 disposed in the hose 3. A high-pressure water supply pump 4 is connected to a base end of the hose 3, and a high-pressure water injection nozzle 5 is
The nozzle 5 is inserted into a nozzle firing gun 6. The high-pressure water jet nozzle 5 is fired from the gun 6 toward an object 7 by driving the rotary drum 2 to rotate in the normal direction and paying out the hose 3. Then, the rotary drum 2 is driven in the reverse direction to wind up the hose 3 so that the high-pressure water jet nozzle 5
Is drawn back into the gun 6 ,
The nozzle firing gun 6 has a high-pressure water injection nozzle 5 and a hoe.
Cleaning nozzle 36 for cleaning the nozzle 3 is provided.
It adopts a configuration .

According to a second aspect of the present invention, in the first aspect of the present invention, the rotary drum 2 is provided with an air motor 21.
The air motor 21 is rotated forward and reverse, and the forward rotation switching valve 31 and the reverse rotation switching valve 32 of the air motor 21 are connected to the nozzle firing gun 6.
Is adopted.

According to a third aspect of the present invention, in the second aspect of the present invention, the moving body 41 is provided on the apparatus main body 1 to reciprocate in conjunction with the forward and reverse rotation of the rotary drum 2. This configuration employs a structure provided with a forward rotation end switch means 48 and a reverse rotation end switch means 49 which are provided at both ends of the movement path and stop the air motor 21 by contacting the moving body 41.

The invention according to claim 4 is the invention according to claim 2 or 3.
In the invention described above, a configuration is adopted in which an air brake 22 that applies a braking force to the air motor 21 in conjunction with a drive stop operation of the air motor 21 is provided.

According to a fifth aspect of the present invention, in the third aspect of the present invention, the distance L between the forward rotation end switch means 48 and the reverse rotation end switch means 49 is adjustable.

The invention according to claim 6 is the invention according to any one of claims 1 to 5 , wherein the nozzle firing gun 6
Is connected to a drain hose 35.

According to a seventh aspect of the present invention, in any one of the first to sixth aspects, a configuration is adopted in which the nozzle port 5a of the high-pressure water injection nozzle 5 is opened obliquely rearward. It is.

[0013] The invention according to claim 8 is the invention of claims 1 to 7, wherein the tip portion of the nozzle firing gun 6,
This adopts a configuration in which an adapter 38 to be fitted to the object 7 is detachably attached.

[0014]

According to the first aspect of the present invention, for example, when cleaning the inner surface of the heat exchange tube 7a of the multitubular heat exchanger 7,
What is necessary is just to fit the tip of the nozzle firing gun 6 into one end opening of the heat exchange tube 7a and drive the rotary drum 2 forward. As a result, the hose 3 is fed out of the rotary drum 2 and the high-pressure water jet nozzle 5 connected to the end of the hose 3
Is sprayed from the gun 6 into the tube 7a, and the deposits deposited on the inner surface of the tube can be pulverized and washed by the high-pressure water injected from the nozzle 5. After the completion of the washing, the hose 3 is driven in the reverse direction only by rotating the rotating drum 2 in the reverse direction.
The nozzle 5 can be pulled back into the gun 6, and thereafter the inner surface of each heat exchange tube 7a can be sequentially washed by the same procedure. Since there is no possibility that the worker directly contacts the dangerous high-pressure water, the washing operation can be performed safely. Ma
The nozzle firing gun 6 has a high-pressure water injection nozzle 5 and
A washing nozzle 36 for washing the hose 3 is provided.
To clean the nozzle 5 and hose 3
Can be.

According to the second aspect of the present invention, the switching valve for normal rotation 31 and the switching valve for reverse rotation 32 of the air motor 21 for rotating the rotating drum 2 in the normal and reverse directions are provided in the nozzle firing gun 6, so that the work is carried out. While the worker operates the nozzle firing gun 6, the operation of firing the nozzle 5 and pulling it back can be easily performed by hand.

According to the third aspect of the present invention, the movable body 41 which reciprocates in conjunction with the forward and reverse rotation of the rotary drum 2 is provided in the apparatus main body 1, and is provided at both ends of the movement path of the movable body 41. The switch means 48 for terminating normal rotation and the switch means 49 for terminating reverse rotation that stop the air motor 21 by being brought into contact with the moving body 41 are provided.
The nozzle 5 can be reliably stopped at a position where the nozzle 5 has been moved by a predetermined distance, and the nozzle 5 can be reliably pulled back into the gun 6 from that position.

According to the fourth aspect of the present invention, an air brake 22 for applying a braking force to the air motor 21 in conjunction with the drive stop operation of the air motor 21 is provided. Since the nozzle does not move more than a predetermined distance due to inertia, the nozzle can be fired at high speed and can be pulled back at high speed.

According to the fifth aspect of the present invention, since the interval L between the forward rotation end switch means 48 and the reverse rotation end switch means 49 is configured to be adjustable, for example, the heat exchange pipe 7a The moving distance of the nozzle 5 can be freely adjusted according to the length of the nozzle 5.

According to the sixth aspect of the present invention, since the drainage hose 35 is connected to the nozzle firing gun 6, the drainage discharged into the gun 6 is reliably collected, and the surroundings are contaminated by the drainage. Can be prevented.

According to the seventh aspect of the present invention, since the nozzle port 5a of the high-pressure water jet nozzle 5 is opened obliquely rearward, the nozzle 5 is driven by the propulsive force of the high-pressure water jetted from the nozzle port 5a. Can be fired at high speed.

According to the eighth aspect of the present invention, since the adapter 38 is detachably attached to the tip of the nozzle firing gun 6, an adapter 38 suitable for the diameter of the object 7 is attached to the gun 6. Thereby, the gun 6 can be securely fitted to the one end opening of the object 7 via the adapter 38.

[0023]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a high-pressure water injection device according to an embodiment of the present invention, in which a hose 3 is wound around a rotary drum 2 which is disposed on a device main body 1 so as to be capable of normal and reverse rotation. A high-pressure water supply pump 4 (see FIG. 6) is connected to a base end of the hose 3, and a high-pressure water injection nozzle 5 is connected to a distal end of the hose 3, and the nozzle 5 is inserted into a nozzle firing gun 6. The rotating drum 2 is driven forward to rotate the hose 3 so that the high pressure water jet nozzle 5
Is fired into the heat exchange tube 7a of the multi-tube heat exchanger (object) 7, and the rotary drum 2 is driven in reverse to wind up the hose 3, whereby the high-pressure water injection nozzle 5 is inserted into the gun 6. They are being pulled back.

As shown in FIGS. 2 to 4, the apparatus main body 1
Casing 1 on cart 10 with casters 8 and handle 9
The casing 11 is divided into upper and lower parts, and a casing lower part 11a is fixed to the carriage 10, and a casing upper part 11b is a casing lower part 1b.
1a is detachably locked by a locking member 12 (see FIG. 1).

As shown in FIG. 3, the rotary drum 2 is fixed to a hollow rotary shaft 16 rotatably supported on a lower casing portion 11a via a bearing 15, and has a spiral groove 17 formed on its outer peripheral surface. The hose 3 is wound.
The base end of the hose 3 is connected to a branch pipe 18 provided on the hollow rotary shaft 16, and the high-pressure water is supplied through a swivel joint 19 and a high-pressure water supply pipe 20 provided at one end of the hollow rotary shaft 16. It is connected to the pump 4.

As shown in FIGS. 2 and 3, an air motor 21 and an air brake 22, which are provided on a lower portion 11a of the casing via a support frame 11c, and the rotating shaft 16 are connected to sprocket wheels 23, 24, 25 and a chain 26. The rotating drum 2 can be rotated forward and reverse by driving the air motor 21, and the air brake 22 is operated in conjunction with the driving stop operation of the air motor 21 to drive the rotating drum 2. 2 can be prevented from rotating more than necessary by inertia. In this case, air is used as a driving source of the rotating drum 2,
Since no electricity is used, there is no risk of an electric shock accident or the like, and the system is safe.

In FIG. 2, reference numeral 27 denotes a hose support roller rotatably supported by the casing 11 and in contact with the outer peripheral surface of the rotary drum 2, which prevents the hose 3 wound around the rotary drum 2 from loosening. Is what you do. Reference numeral 28 denotes a reinforcing rod disposed between both side walls of the casing lower part 11a and the casing upper part 11b.

The nozzle firing gun 6, as shown in FIG.
A high-pressure water injection nozzle 5 is housed in the front small-diameter portion 6a, and a hose support device 30 for elastically supporting the hose 3 is provided in the rear large-diameter portion 6b. A forward rotation switching valve 31 and a reverse rotation switching valve 32 of the air motor 21 are provided on a grip portion 6c extending downward from the portion 6b. When the operation lever 31a of the forward rotation switching valve 31 is pressed, the air pump 33 (FIG. 6) is communicated with the air motor 21 and the air motor 21 is driven to rotate forward, whereby the hose 3 is fed out and the nozzle 5
Is fired from the gun 6 into the heat exchange tube 7a. When the operating lever 32a of the reverse rotation switching valve 32 is pressed, the air pump 33 and the air motor 21 are connected to each other, and the air motor 21 is driven to rotate in the reverse direction.
Is wound up, and the nozzle 5 is pulled back into the gun 6.

The nozzle port 5a of the nozzle 5 is opened obliquely rearward, so that the nozzle 5 can be fired at a high speed by the propulsive force of the high-pressure water jetted from the nozzle port 5a, and the heat exchange pipe is provided. The sediment deposited on the inner surface of 7a can be pushed backward and discharged.

In FIG. 5, reference numeral 35 denotes a drain hose connected to a drain port 6d provided at the center of the gun 6, which reliably collects waste water discharged from the heat exchange pipe 7a into the gun 6. ,
The surrounding area can be prevented from being polluted by the drainage. Also,
Reference numeral 36 denotes a washing nozzle provided at the base of the drainage port 6d, which is connected to the high-pressure water supply pump 4 via a washing hose 37, and is separated from the inner surface of the heat exchange pipe 7a by the nozzle 5 and the hose 3 The deposits adhering to the can be washed away. Reference numeral 38 denotes an adapter which is detachably screwed to the distal end of the gun 6 and whose distal tapered surface 39a of the through hole 39 is fitted into one end opening of the heat exchange tube 7a.
9, a plurality of adapters 38 having different diameters are prepared in advance, and an appropriate adapter 38 is attached to the gun 6 in accordance with the diameter of the heat exchange tubes 7a. The gun 6 can be surely fitted to the.

In FIGS. 2 and 3, reference numeral 41 denotes a cylindrical moving body fixed to a pair of moving blocks 43 movably fitted to a pair of guide rods 42 provided between both side walls of the casing lower part 11a. The guide roller 44 provided at the upper end of the movable member 41 fits into the spiral groove 17 of the rotary drum 2, and the tip of the moving body 41 is connected to the nozzle firing gun 6 via the flexible tube 45, and the hose 3 rotates. The moving body 41 extends from the drum 2 through the through-hole 46 and the flexible tube 45 of the moving body 41 into the gun 6. When the rotating drum 2 is rotated forward and backward, the moving body 41 moves along the guide rod 42 in conjunction with the rotation. The hose 3 is reciprocated, and the hose 3 can be smoothly fed and wound.

In FIG. 4, reference numerals 48 and 49 denote moving bodies 41.
And a reverse rotation end switch valve (reverse rotation end switch means) composed of a 3-port, two-position air valve provided at both ends of the movement path. The end switch valve 49 is fixed to one side wall of the casing lower part 11a. The forward rotation end switch valve 48 is movably fitted to the guide rod 42, and a screw hole 50 formed at the upper end thereof is formed in the casing lower part 11a. 4 is fixed to a moving frame 52 screwed to a screw shaft 51 rotatably provided between both side walls. The rotating drum 2 rotates forward from the solid line state in FIG. When the body 41 comes into contact with the detection lever 48a of the forward rotation end switch valve 48 (in the phantom line state in the figure), the forward rotation end switch valve 48 switches from the air motor 21 side to the air brake 22 side. Then, the feeding of the hose 3 can be stopped immediately, and the rotating drum 2 is reversed from the state of the imaginary line in FIG. When the lever 49 hits the detection lever 49a (the solid line state in the figure), the reverse rotation end switch valve 49 is switched from the air motor 21 side to the air brake 22 side, and the winding of the hose 3 can be immediately stopped (FIG. 6).

Also, by rotating the manual handle 54 fixed to one end of the screw shaft 51 in the normal and reverse directions to move the switch valve 48 for terminating normal rotation and adjusting the distance L between the two switch valves 48 and 49, The moving distance of the nozzle 5 can be freely adjusted according to the length of the heat exchange tube 7a. In FIG. 4, reference numeral 55 denotes a support rod for supporting the air pipe 56 connected to the forward rotation end switch valve 48 so as not to get tangled.

In FIG. 6, 58 is a switching valve of the high-pressure water supply pump 4, 59 is a relief valve for the air pump 33, and 60 is a variable flow control valve.

The procedure for cleaning the inner surface of the heat exchange pipe 7a based on the above configuration will be described. First, the manual handle 54 is rotated forward and reverse to rotate the forward / reverse switch valve 48.
To adjust the distance L between the two switch valves 48 and 49 in accordance with the length of the heat exchange pipe 7a, and also operate the high-pressure water supply pump 4 and the air pump 33 to switch the switching valve 58. In a state in which high-pressure water is jetted from the nozzle port 5a through the hose 3 and the nozzle 5, as shown in FIG. 1, an operator grips the nozzle firing gun 6 and connects the adapter 38 to one end of the heat exchange tube 7a. Fit into the opening and gun 6
The operating lever 31a of the switching valve 31 for forward rotation provided in the above may be pressed. Thereby, high-pressure air is supplied from the air pump 33 to the air motor 21 via the forward rotation switching valve 31 and the forward rotation end switch valve 48, and the rotation of the rotary drum 2 is normally rotated by the driving of the air motor 21. As the moving body 41 moves forward, the hose 3 is fed out from the rotary drum 2, and the nozzle 5 is fired from the nozzle firing gun 6 into the heat exchange tube 7a. In this case, the nozzle port 5a
Are open diagonally rearward, the nozzle port 5
The nozzle 5 is moved at high speed in the heat exchange tube 7a by the propulsive force of the high-pressure water injected from the nozzle a, and the deposits deposited on the inner surface of the heat exchange tube 7a are separated by the high-pressure water.

When the nozzle 5 reaches the opening at the other end of the heat exchange tube 7a and the moving body 41 comes into contact with the detection lever 48a of the forward rotation end switch valve 48 (in the state of the phantom line in FIG. 4), the forward rotation end switch is turned on. The valve 48 is switched from the air pump 33 side to the air brake 22 side, the rotation of the rotary drum 2 is immediately stopped, and the hose 3 is prevented from being pulled out by inertia.

Next, the operating lever 32a of the reverse rotation switching valve 32 provided on the gun 6 may be pushed. Thereby, high-pressure air is supplied from the air pump 33 to the air motor 21 via the reverse rotation switching valve 32 and the reverse rotation end switch valve 49, and the rotation of the rotary drum 2 is reversed and driven by the driving of the air motor 21. When the body 41 moves back, the hose 3 is wound around the rotating drum 2 and the nozzle 5
Is pulled back into the gun 6. When the nozzle 5 is pulled back, the sediment separated from the inner surface of the heat exchange tube 7a is pushed out into the gun 6 by the high-pressure water injected from the nozzle port 5a, and is injected from the cleaning nozzle 36. The deposits adhering to the hose 3 and the nozzle 5 are washed and removed by the high-pressure water, and the removed deposits are drained by the drain hose 3.
Collected via 5.

When the nozzle 5 returns to the inside of the gun 6 and the moving body 41 comes into contact with the detection lever 49a of the reverse rotation end switch valve 49 (solid state in FIG. 4), the reverse rotation end switch valve 49 is moved from the air pump 33 side to the air brake. Then, the rotation of the rotary drum 2 is stopped immediately to prevent the hose 3 from being wound up by inertia.

Thereafter, the inner surface of each heat exchange tube 7a may be cleaned in the same procedure.

In the above embodiment, the case where the inner surface of the heat exchange tube 7a is cleaned has been described as an example. However, the present invention can be applied to cleaning of various devices.

[0042]

According to the first aspect of the present invention, the hose wound around the rotary drum is extended only by driving the rotary drum forward while the nozzle firing gun is fitted to the object. The high-pressure water jet nozzle connected to the end of the hose can be fired toward the object from the gun, and the high-pressure water can be jetted from the nozzle toward the object, and the rotating drum is rotated in reverse. Just by driving, the hose can be wound around the rotating drum and the nozzle can be pulled back into the gun, and during the work, there is a possibility that the worker may come into direct contact with dangerous high-pressure water jetted from the nozzle. No work can be done safely. In addition, the nose
Clean the high pressure water injection nozzle and hose for the firing gun
Cleaning nozzle is provided for
Easy removal of removed material adhering to nozzle and hose
Can be washed away.

According to the second aspect of the present invention, since the forward rotation switching valve and the reverse rotation switching valve of the air motor for rotating the rotating drum in the forward and reverse directions are provided in the nozzle firing gun, an operator can use the nozzle firing gun. The operation of firing the nozzle and pulling it back can be easily performed by hand while operating.

According to the third aspect of the present invention, the apparatus main body is provided with a moving body that reciprocates in conjunction with the forward and reverse rotation of the rotary drum, and is provided at both ends of the moving path of the moving body. Since the forward rotation ending switch means and the reverse rotation ending switch means for stopping the air motor by contact with the nozzle are provided, the nozzle can be reliably stopped at a position moved by a predetermined distance, and The nozzle can be reliably pulled back into the gun from that position.

According to the fourth aspect of the present invention, an air brake for applying a braking force to the air motor in conjunction with the operation of stopping the operation of the air motor is provided, and the nozzle has a predetermined distance due to the inertia of firing and pulling back. Since the nozzle does not move as described above, the nozzle can be fired at high speed and can be pulled back at high speed.

According to the fifth aspect of the present invention, since the interval between the forward rotation end switch means and the reverse rotation end switch means is configured to be adjustable, the nozzle can be adjusted according to the length of the object. Can be freely adjusted.

According to the sixth aspect of the present invention, since a drain hose is connected to the nozzle firing gun, drain water discharged from the target into the gun is reliably collected, and the surroundings are contaminated by the drain water. Can be prevented.

According to the seventh aspect of the present invention, since the nozzle port of the high-pressure water injection nozzle is opened obliquely rearward, the nozzle is fired at high speed by the propulsive force of the high-pressure water injected from the nozzle port. In addition to this, the removed matter removed from the target object can be pushed out backward and reliably discharged.

According to the eighth aspect of the present invention, since the adapter for fitting to the object is detachably attached to the tip of the nozzle firing gun, the adapter adapted to the diameter of the object is connected to the gun. Just attach to the tip of the
The gun can be securely fitted to the object via the adapter.

[Brief description of the drawings]

FIG. 1 is a side view showing a state in which the inner surface of a heat exchange pipe is being cleaned by a high-pressure water injection device according to one embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of the apparatus main body.

FIG. 3 is a cross-sectional view of the apparatus main body.

FIG. 4 is a front view of the apparatus main body.

FIG. 5 is a vertical sectional view of the nozzle firing gun.

FIG. 6 is a circuit diagram illustrating the operation principle of the device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Apparatus main body 2 Rotary drum 3 Hose 4 High-pressure water supply pump 5 High-pressure water injection nozzle 5a Nozzle port 6 Nozzle firing gun 7 Multi-tube heat exchanger (object) 7a Heat exchange tube 21 Air motor 22 Air brake 31 For normal rotation Switching valve 32 Switching valve for reverse rotation 35 Drain hose 36 Cleaning nozzle 38 Adapter 41 Moving body 48 Switch valve for normal rotation end (switch means for normal rotation end) 49 Switch valve for reverse rotation end (switch means for reverse rotation end) L Normal rotation end Between switch valve for reverse rotation and switch valve for reverse rotation

Claims (8)

(57) [Claims] 1. A hose is wound around a rotary drum disposed in a main body of the apparatus such that the hose can be driven forward and reverse. A high-pressure water supply pump is connected to a base end of the hose, and a high-pressure water supply pump is connected to a distal end of the hose. A water injection nozzle is connected, the nozzle is inserted into a nozzle firing gun, and the high-pressure water injection nozzle is fired from the gun toward an object by driving the rotary drum in a forward direction and paying out a hose. The high-pressure water injection nozzle is configured to be pulled back into the gun by driving the drum in reverse and winding the hose ,
Cleaning high pressure water injection nozzle and hose for nozzle firing gun
High-pressure water injection device provided with a cleaning nozzle for cleaning . 2. The high-pressure water injection according to claim 1, wherein the rotary drum is driven to rotate forward and reverse by an air motor, and a forward rotation switching valve and a reverse rotation switching valve of the air motor are provided in a nozzle firing gun. apparatus. 3. A moving body which reciprocates in conjunction with forward and reverse rotation of a rotary drum is provided in the apparatus main body, and is provided at both ends of a moving path of the moving body to contact the moving body to operate an air motor. 3. The high-pressure water injection device according to claim 2, further comprising a switch means for terminating normal rotation and a switch means for terminating reverse rotation. 4. The high-pressure water injection device according to claim 2, further comprising an air brake that applies a braking force to the air motor in conjunction with a drive stop operation of the air motor. 5. The high-pressure water injection device according to claim 3, wherein an interval between the forward rotation end switch means and the reverse rotation end switch means is adjustable. 6. A drain hose is connected to the nozzle firing gun.
High-pressure water injection system according to any one of claims 1 to 5 formed by. 7. A nozzle opening of the high-pressure water injection nozzle is oblique.
The high-pressure water injection device according to any one of claims 1 to 6, wherein the high-pressure water injection device is opened rearward . 8. A target object is provided at the tip of said nozzle firing gun.
The high-pressure water injection device according to any one of claims 1 to 7, wherein an adapter that fits into the device is detachably attached .