JP3428587B2 - In-pipe cleaning nozzle - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-pipe cleaning nozzle for injecting high-pressure water onto the inner peripheral surface of a pipe such as a water distribution pipe for cleaning.

[0002]

2. Description of the Related Art Conventionally, this type of in-pipe cleaning nozzle is divided into two types, one that rotates (rotates) the injection port (rotating type) and the other that does not (fixed type). Since it hits only a part of the inner peripheral surface of the pipe, and uneven cleaning may occur, the rotating type is becoming the mainstream.

[0003]

However, in this rotary type in-pipe cleaning nozzle, the injection port is rotated by the reaction force when the high-pressure water is ejected from the injection port. Therefore, the cleaning force should be increased. When the pressure of the high-pressure water is increased, the number of rotations of the injection port also increases, and the high-pressure water discharged from the injection port becomes mist, which rather reduces the cleaning power.

In order to eliminate such an inconvenience, a method of decelerating the injection port by combining gears can be considered, but in that case, the mechanism becomes complicated and the device becomes large, so that not only the cost rises but also It is not suitable for running type pipe cleaning nozzles.

In view of such circumstances, the present invention provides a small-sized and inexpensive pipe cleaning nozzle capable of cleaning the inner peripheral surface of the pipe uniformly, enhancing the cleaning power according to the pressure rise of high-pressure water. With the goal.

[0006]

First, in the invention according to claim 1 of the present invention, in a pipe cleaning nozzle (1) connectable to a water supply hose, a water passage (3) communicating with the water supply hose is formed. The nozzle shaft (2) is provided with a rotary part (5) rotatably provided on the nozzle shaft, and the rotary injection port (6) and the rear injection port (7) are connected to the water passage on the rotary part. The braking pin (10) is provided on the rotating portion so as to be movable in the radial direction of the rotating portion, and the nozzle end (11) is provided on the nozzle shaft so as to cover the braking pin.

By adopting such a configuration, when high-pressure water is supplied to the water passage of the nozzle shaft, the high-pressure water is discharged from the rotary jet port and the rear jet port, and the rotary unit moves forward while rotating and the rotary unit moves. When rotated, the braking pin projects due to the centrifugal force and comes into contact with the nozzle end, so that the rotation of the rotating portion due to pressurization of the high-pressure water is braked.

In the invention according to claim 2 of the present invention, a water conduit (15) for supplying water to the tip of the braking pin (10) is provided in communication with the water conduit (3). . With this structure, water is supplied to the tip of the braking pin when the in-pipe cleaning nozzle is used, and the frictional heat generated at the contact portion between the braking pin and the nozzle end is removed to prevent seizure.

In the invention according to claim 3 of the present invention, in the pipe cleaning nozzle (1) connectable to the water supply hose, a nozzle shaft (2) having a water passage (3) communicating with the water supply hose is formed. ), A rotary part (5) is rotatably provided on the nozzle shaft, and a rotary injection port (6) and a rear injection port (7) are provided in communication with the water passage on the rotary part. A braking tip (13) is provided to be openable and closable, and a nozzle end (11) is provided on the nozzle shaft so as to cover the braking tip.

By adopting such a configuration, when high-pressure water is supplied to the water passage of the nozzle shaft, the high-pressure water is discharged from the rotary jet port and the rear jet port, and the rotary part moves forward while rotating and the rotary part moves. When rotating, the centrifugal force causes the braking tip to open and abut the nozzle end, so that the rotation of the rotating unit due to the pressurization of high-pressure water is damped.

Further, the invention according to claim 4 of the present invention is constituted by providing a water conduit for supplying water to the outside of the braking tip (13) in communication with the water conduit (3). With this configuration, water is supplied to the outside of the braking tip when the in-pipe cleaning nozzle is used, and the frictional heat generated at the contact portion between the braking tip and the nozzle end is removed to prevent seizure.

Note that the reference numerals in parentheses are for convenience of representing corresponding elements in the drawings, and therefore the present invention is not limited to the description in the drawings. This also applies to the "Claims" section.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

<First Embodiment> FIG. 1 is a view showing a first embodiment of a pipe cleaning nozzle according to the present invention.
(A) is a side view thereof, (b) is a sectional view taken along the line BB of (a), (c) is a rear view of the rotating portion, (d) is D of (a).
FIG. 6E is a cross-sectional view taken along line D, and FIG.

As shown in FIG. 1A, this in-pipe cleaning nozzle 1 has a nozzle shaft 2 which can be screwed onto the tip of a water supply hose (not shown), and the nozzle shaft 2 has a water passage. 3 is formed so as to communicate with the water supply hose.

Further, the nozzle shaft 2 has a substantially cylindrical rotating portion 5
1 is rotatably mounted, and the rotating unit 5 has the structure shown in FIG.
As shown in (b), four rotary injection ports 6 (6A, 6A)
B, 6C, 6D) are all screwed together so as to communicate with the water passage 3 of the nozzle shaft 2. Here, each rotary jet port 6 is provided at an angle inclined with respect to the radial direction of the rotating part 5, and the two rotary jet ports 6A and 6C facing each other have the remaining two rotary jet ports 6B and 6D. The inner diameter is larger. Furthermore, as shown in FIG.
Four rear injection ports 7 are arranged at equal angular intervals (90 ° intervals) on the circumference of the rotating part 5 and are projected obliquely rearward. Each of the rear injection ports 7 is provided with the nozzle shaft 2 Waterway 3
Is in communication with. By the way, the rotary unit 5 has a structure shown in FIG.
As shown in (d) and (e), four pin storage grooves 9 are arranged at equal angular intervals (90 ° intervals) on the circumference of the rotating portion 5, and each pin storage groove 9 has Each of the braking pins 10 is embedded so as to be movable in the radial direction of the rotating portion 5. In addition,
As shown in FIGS. 1 (a) and 1 (d), two water conduits 15 are formed on the front surface of the rotating portion 5 so as to communicate with the water conduit 3 of the nozzle shaft 2, and water is introduced into the water conduit 3. If there is, this water will be supplied to the tip of each braking pin 10 through each water conduit 15.

Further, as shown in FIG. 1A, a nozzle end 11 is mounted on the nozzle shaft 2 so as to cover all the braking pins 10, and a set screw 12 is provided at the tip of the nozzle shaft 2. The nozzle end 11 is screwed into the nozzle shaft 2 in a fixed manner.

Since the in-pipe cleaning nozzle 1 has the above-described structure, when cleaning the inner peripheral surface of a pipe (not shown) such as a water distribution pipe, the in-pipe cleaning nozzle 1 is connected to a water supply hose (not shown). ), And supplies high-pressure water from the water supply hose to the water passage 3 of the nozzle shaft 2. Then, high-pressure water is vigorously discharged from each of the rotary jet ports 6A, 6B, 6C, 6D of the rotary unit 5 and each of the rear jet ports 7.

At this time, as shown in FIG. 1B, the discharge amount of each rotary injection port 6 also differs due to the difference in the inner diameters of the four rotary injection ports 6A, 6B, 6C, 6D. Since a couple is generated in the rotating portion 5, the rotating portion 5 rotates in the arrow L direction due to the reaction force. On the other hand, high-pressure water is discharged rearward from the rear injection port 7, so that the reaction force causes the in-pipe cleaning nozzle 1 to advance in the pipe together with the water supply hose. As a result, the high-pressure water discharged from each rotary jet port 6 and each rear jet port 7 of the in-pipe washing nozzle 1 is discharged in a spiral shape and strongly hits the entire inner peripheral surface of the pipe. It is cleaned uniformly without causing uneven cleaning.

By the way, when the rotating portion 5 of the in-pipe cleaning nozzle 1 rotates, the centrifugal force generated by the rotation causes the four braking pins 1 to rotate.
Since 0 projects outward in the radial direction of the rotating portion 5 and abuts on the inner peripheral surface of the nozzle end 11, frictional resistance is generated at the abutting portion and the rotational speed of the rotating portion 5 is suppressed. Since this frictional resistance increases as the rotation speed of the rotating unit 5 increases, even if the pressure of the high-pressure water is increased in order to increase the cleaning power, it is possible to suppress the speeding up of the rotating unit 5 associated with it. As a result, it is possible to avoid the problem that the high-pressure water is atomized due to the high-speed rotation of the rotating unit 5, and it is possible to increase the cleaning power according to the increase in pressure of the high-pressure water. Moreover, since the high-pressure water supplied from the water supply hose to the water passage 3 is also supplied to the tip portions of all the braking pins 10, the friction heat generated at the contact portion between each braking pin 10 and the nozzle end 11 is eliminated. It is possible to prevent it from being seized.

In the first embodiment described above, the pipe cleaning nozzle 1 in which the rotating portion 5 is provided with the braking pin 10 in order to suppress the speedup of the rotating portion 5 has been described. Alternatively, a braking chip can be used. Hereinafter, as a second embodiment, an in-pipe cleaning nozzle 1 that employs this braking tip will be described.
However, the same parts as those of the in-pipe cleaning nozzle 1 in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

<Second Embodiment> FIG. 2 is a view showing a second embodiment of the pipe cleaning nozzle according to the present invention.
(A) is sectional drawing which shows the principal part, (b) is a top view of a rotating part.

In this in-pipe cleaning nozzle 1, as shown in FIG. 2, two braking tips 13 are freely opened / closed in the rotating portion 5 by rotating around the fulcrum pin 14 in the directions of arrows M and N. It is mounted and the nozzle ends 11 are located outside of these braking tips 13. Further, two water conduits (not shown) are formed on the front surface of the rotating portion 5 so as to communicate with the water conduit 3 of the nozzle shaft 2, and if there is water in the water conduit 3, this water conduit 3 Will be supplied to the outside of each braking tip 13 through each of the water conduits. Other configurations are the same as those in the first embodiment.

Also in this case, when high-pressure water is supplied to the water passage 3 of the nozzle shaft 2 when cleaning the inner peripheral surface of the pipe, the high-pressure water is discharged from each rotary jet port 6 and each rear jet port 7, and the rotary part 5 is rotated. Since it moves while rotating, the inner peripheral surface of the pipe is uniformly washed with high-pressure water. At this time, the two braking tips 13 are opened by the centrifugal force due to the rotation of the rotating part 5 of the in-pipe cleaning nozzle 1 and abut against the inner peripheral surface of the nozzle end 11, so that frictional resistance occurs and the rotating part 5 rotates. Is braked. Since this frictional resistance increases as the rotation speed of the rotating unit 5 increases, even if the pressure of the high-pressure water is increased in order to increase the cleaning power, it is possible to suppress the speeding up of the rotating unit 5 associated with it. as a result,
It is possible to avoid the problem that the high-pressure water is atomized due to the high-speed rotation of the rotating unit 5, and it is possible to increase the cleaning power according to the pressure increase of the high-pressure water. Moreover, both braking chips 1
Since high-pressure water is supplied to the outside of 3, each braking tip 13
The frictional heat generated at the contact portion between the nozzle end 11 and the nozzle end 11 can be removed to prevent seizure.

[0025]

As described above, according to the first aspect of the present invention, when high pressure water is supplied to the water passage of the nozzle shaft, the high pressure water is discharged from the rotary jet port and the rear jet port. When the rotating part rotates and moves forward, and the rotating part rotates, the centrifugal force causes the braking pin to project and come into contact with the nozzle end, so that rotation of the rotating part due to pressurization of high-pressure water is braked. Thus, it is possible to provide an in-pipe cleaning nozzle that can uniformly clean the inner peripheral surface of the pipe and enhances the cleaning power according to the pressurization of high-pressure water. Moreover, since it is not necessary to provide a speed reducer in which gears are combined, it is possible to reduce the cost and size of the in-pipe cleaning nozzle.

According to the second aspect of the present invention, when the pipe cleaning nozzle is used, water is supplied to the tip portion of the braking pin, and friction heat generated at the contact portion between the braking pin and the nozzle end. Since the seizure is removed and seizure is prevented, the durability and reliability of the pipe cleaning nozzle can be improved.

According to the third aspect of the present invention, when high-pressure water is supplied to the water passage of the nozzle shaft, the high-pressure water is discharged from the rotary jet port and the rear jet port, and the rotating part rotates. While moving forward while rotating, the centrifugal force causes the braking tip to open and come into contact with the nozzle end, so the rotation of the rotating part due to pressurization of high-pressure water is braked, so the inner peripheral surface of the pipe It is possible to provide an in-pipe cleaning nozzle capable of uniformly cleaning the same and increasing the cleaning power according to the pressure rise of the high-pressure water. Moreover, since it is not necessary to provide a speed reducer in which gears are combined, it is possible to reduce the cost and size of the in-pipe cleaning nozzle.

Further, according to the invention of claim 4 of the present invention, water is supplied to the outside of the braking tip when the in-pipe cleaning nozzle is used, and the friction heat generated at the contact portion between the braking tip and the nozzle end. Since the seizure is removed and seizure is prevented, the durability and reliability of the pipe cleaning nozzle can be improved.

[Brief description of drawings]

1A and 1B are diagrams showing a first embodiment of an in-pipe cleaning nozzle according to the present invention, in which FIG. 1A is a side view thereof, FIG. 1B is a sectional view taken along line BB of FIG. 1A, and FIG. 6A is a rear view of the rotating portion, FIG. 7D is a cross-sectional view taken along the line D-D of FIG. 8A, and FIG.

FIG. 2 is a view showing a second embodiment of the pipe cleaning nozzle according to the present invention, in which (a) is a cross-sectional view showing a main part thereof;
(B) is a plan view of the rotating portion.

[Explanation of symbols]

1 ... Pipe cleaning nozzle 2 ... Nozzle shaft 3 ... Waterway 5 ... Rotating part 6 ... Rotating injection port 7 ... Rear injection port 10 ... Braking pin 11 ... Nozzle end 13 ... Braking tip 15 ... Headrace

Claims (4)

(57) [Claims] 1. A pipe cleaning nozzle (1) connectable to a water supply hose, comprising a nozzle shaft (2) having a water passage (3) communicating with the water supply hose, and a rotating part ( 5) is rotatably provided, and a rotary injection port (6) and a rear injection port (7) are provided in this rotating part.
Is provided in communication with the water passage, a braking pin (10) is provided in the rotating portion so as to be movable in the radial direction of the rotating portion, and a nozzle end (11) is provided in the nozzle shaft so as to cover the braking pin. In-pipe cleaning nozzle characterized by 2. The pipe cleaning nozzle according to claim 1, wherein a water conduit (15) for supplying water to the tip of the braking pin (10) is provided in communication with the water conduit (3). 3. A pipe cleaning nozzle (1) connectable to a water supply hose, comprising a nozzle shaft (2) having a water passage (3) communicating with the water supply hose, and a rotating part ( 5) is rotatably provided, and a rotary injection port (6) and a rear injection port (7) are provided in this rotating part.
Is provided so as to communicate with the water passage, a braking tip (13) is openably and closably provided on the rotating portion, and a nozzle end (11) is provided on the nozzle shaft so as to cover the braking tip. Cleaning nozzle. 4. The pipe cleaning nozzle according to claim 3, wherein a water conduit for supplying water to the outside of the braking tip (13) is provided in communication with the water conduit (3).