JPH0121031Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention uses pressurized water supplied from the rear end of the hose to be sprayed backwards from a nozzle attached to the end of the hose, and while it travels within the pipe, it removes dirt and grime that have adhered to the inner wall of the pipe. , relates to an improvement of a pipe cleaning device for removing deposits and the like.

[Conventional technology]

Conventionally, in water supply and drainage pipes buried in high-rise houses such as apartments and condominiums and on streets, or in pipes that carry chemical solutions and other fluids in chemical factories, etc., filth, sediment, impurities, etc. can build up on the inner walls of the pipes during use. It sticks, so you need to clean it regularly. Such cleaning methods include chemical methods using chemicals and mechanical methods, but the former has drawbacks such as expensive chemicals and the fact that some substances cannot be removed with chemicals, while the latter mechanical method Cleaning is often adopted from the viewpoint of cost and removal effectiveness, and among these methods, a method in which pressurized water is sprayed inside the pipe to remove deposits is widely used.

As a device for this purpose, one end of the nozzle is bulged obliquely in the radial direction, a plurality of injection ports are provided on this bulging slope that are directed diagonally to the rear of the nozzle, and a water supply port is provided at the rear end of the nozzle. By connecting a pressure hose to the pipe, inserting the nozzle into the pipe to be cleaned, and spraying pressurized water from the nozzle's jet port, the inner wall surface of the pipe can be cleaned while the nozzle is self-propelled by the reaction force from the jet of pressurized water. A pipe cleaning device that can perform this is known (see, for example, Japanese Utility Model Publication No. 54-27257).

However, since domestic drainage pipes and the like are often bent, there is a problem in that the range in which the cleaning device can be used is limited.

In order to solve such problems,
Publication No. 39511 states that it consists of an intermediate piece and a tip piece,
By attaching the guide piece, which is made up of these pieces connected so that they can be curved according to the shape of the pipe, to the tip of the nozzle as a nozzle guide, even if the pipe is bent at right angles, the intermediate piece and the tip piece can be guided. A pipe cleaning device that can be bent to clean the inside of a pipe is disclosed.

[Problem that the invention attempts to solve]

However, with this type of pipe cleaning equipment, although it has become possible to easily penetrate even complicated pipes by guiding the nozzle guide, during cleaning work, the nozzle guide is moved against the pipe wall by the reaction force of the jet of pressurized water. They are often hit by objects or forcefully inserted into curved parts, which has the disadvantage that the nozzle is easily damaged or the handle of the intermediate piece is easily broken. Furthermore, even if the handle part does not break, repeated use may cause wear of the connecting balls, internal cavity openings, etc., making it easier for the pieces to come off, or uneven wear of the connecting balls, internal cavities of the pieces, etc. There is also a drawback that the nozzle guide does not curve smoothly due to various reasons such as scale, rust, etc. inside the pipe becoming clogged in the inner cavity of the piece.

Conventionally, when such a situation occurs, the nozzle guide is replaced, but in the conventional example described above, the nozzle guide is fixed to the tip of the nozzle via the handle, and the opening of the intermediate piece is crimped to the piece support ball. Due to the attached structure, the user of the cleaning device cannot easily replace the nozzle guide, and therefore, in case the nozzle guide becomes unwell during cleaning, a spare, pressure-resistant It was necessary to prepare a set with a hose. Furthermore, if the bridge support ball at the tip of the nozzle wears out, the nozzle itself must be replaced because the bridge support ball and nozzle are integrally formed. The problem was that it was uneconomical.

Furthermore, in the latter type of conventional pipe cleaning device, the nozzle guide is connected to a spherical portion at the tip of a handle that is integrally protruded from the tip surface of the nozzle, and rotates at an angle about this spherical portion as a fulcrum. In order to
In effect, the nozzle becomes longer. the result,
There was an unresolved problem that the overall radius of curvature became large, making it impossible to enter the bend in a narrow conduit, and the guiding effect of the nozzle guide was halved.

This invention was made in order to solve this problem, and includes a nozzle guide at the tip to facilitate the entry of the nozzle into the pipe, and the nozzle guide is effectively attached. Moreover, it is an object of the present invention to provide a pipe cleaning device that can be easily installed and replaced without using any special equipment such as a crimping machine.

[Means for solving problems]

This invention was made to solve the problems of the prior art described above, and therefore, according to this invention, a connecting ball storage hole is provided on the tip surface, and a hole is provided at the tip of the pressurized water supply pipe to supply pressurized water. A nozzle that self-propelled cleans the inside of a pipe by reverse spraying, at least one intermediate piece on the distal end side of the nozzle having an open lumen on the rear end surface, and a distal piece connected to the intermediate piece. A nozzle guide that is connected so as to be curved in the longitudinal direction and guides the nozzle in a curved manner, and has at the other end a connecting ball that is rotatably locked in a lumen of an intermediate piece of the nozzle guide; A pipe cleaning device comprising: a connecting rod having one connecting ball; and a connecting cup that allows the connecting rod to pass through and detachably locks one connecting ball in the connecting ball storage hole of the nozzle. Configure.

[Effect]

According to this invention, as described above, in a pipe cleaning device using a reverse injection nozzle, a nozzle guide that can be bent in the longitudinal direction is provided at the tip of the reverse injection nozzle using a connecting rod and a connecting cup, and the attachment portion thereof is Since the nozzle guide can be tilted and rotated and is detachably attached to the nozzle, the nozzle guide can be bent from the tip surface using the inside of the nozzle as a fulcrum.This reduces the radius of curvature and allows the nozzle guide to be easily attached even in complicated piping. Since the nozzle is curved according to the shape of the piping and guides the nozzle, it is not only possible to move forward and clean inside the piping easily, but also to install special equipment such as a crimping machine when installing the nozzle guide. The installation cost is reduced because it can be installed very easily without using any.

Furthermore, in this type of pipe cleaning device, the nozzle guide may be damaged due to repeated use.
Alternatively, the nozzle guide may need to be replaced due to various factors, such as wear of the connecting parts or adhesion of scale, etc., which prevents the nozzle guide from bending smoothly.
In such cases, the pipe cleaning device according to this invention has a structure in which the nozzle guide can be freely attached and detached, so the user can easily replace it on site.
Therefore, there is no need to prepare a separate cleaning device.

In addition, if you prepare nozzle guides with different numbers of intermediate pieces in advance, you can select the most suitable nozzle guide according to the shape, inner diameter, etc. of the piping to be cleaned and easily install it on site, improving the efficiency of cleaning work. will make a significant contribution to

〔Example〕

FIG. 1 shows an embodiment of the pipe cleaning device 10 according to this invention, and is a partially longitudinal side view of the vicinity of the nozzle.

This pipe cleaning device 10 sprays pressurized water, which is force-fed from the rear end of the hose 11 to the central neck part, obliquely backward at the tip of a pressure-resistant hose 11 as a pressurized water supply pipe whose rear end is connected to a pump device (not shown), for example. A nozzle 16 is integrated with the nozzle 16 at the rear thereof, and has a plurality of injection ports 12 for spraying, and has a connecting ball storage hole 13 at the tip and a male screw section 14 on the outer peripheral surface of the tip. The nozzle 16 is fixed by tightening the socket 15 from the circumferential direction, and a coupling ball 22 is provided at the tip of the nozzle 16 via the handle portion 21 at the front end.
intermediate pieces 24a and 24b having an open inner cavity 23 at the rear end surface;
A nozzle guide 20 is provided at the tip of the nozzle 16 at one end, and includes a tip piece 26 having an open inner cavity 25 on the rear end surface for receiving the coupling ball 22 of b and allowing oblique rotation around it. It has one connecting ball 32 for being received in the connecting ball storage hole 13 and rotatably locked around the connecting ball 32, and has an intermediate piece 24a connected to the nozzle 16 at the other end. A connecting rod 30 having the other connecting ball 31 for receiving in the inner cavity 23 and locking around the inner cavity 23 so as to be rotatable at an angle; The one connecting ball 32 is attached to the tip of the nozzle 16.
The nozzle 16 is removably connected to the tip of the nozzle 16 by a connecting device consisting of a connecting cup 35 that locks the nozzle 16.

In addition, in this configuration, the intermediate piece 24b has a connecting structure that can be tilted and rotated with respect to the intermediate piece 24a, similar to the tip piece 26 and the intermediate piece 24a, and the connecting rod 30 is inserted into the connecting cup 35. After that, for example, leave a slight gap 36 and connect the connecting cup 3.
5 is secured to the connecting cup 35 by crimping from the circumferential direction, and is further secured to the nozzle 16, so that it can be tilted and rotated with respect to the nozzle 16.

FIG. 2 shows a pipe 40 of a pipe cleaning device in which the number of intermediate pieces 24 of the nozzle guide 20 of the embodiment shown in FIG. 1 is reduced to three.
FIG.

Pressurized water pumped from a pump device (not shown) strongly hits the inner surface of the pipe 40 sprayed from the injection port 12 of the nozzle 16 to clean it. Since the injection port 12 of the nozzle 16 opens diagonally backward as described above, the nozzle 16 and the hose 11 adhered to the inner surface of the pipe 40 due to the reaction force from the pressurized water jetted toward the rear of the pipe 40 from there. It is allowed to run inwards inside the pipe 40 while scraping out the dirt layer. At the curved portion, the nozzle guide 20 is easily bent and the nozzle 16 and hose 1 are
1 and can clean even complex piping. Further, the nozzle guide 20 is connected to the nozzle 16 via a connecting device consisting of a connecting rod 30 and a connecting cup 35.
Since the connecting rod 30 is connected to the nozzle 16 so as to be rotatable at an angle, the nozzle guide 20 is bent from the tip of the nozzle 16, and its radius of curvature is smaller than that of the conventional one. Therefore, its scope of application is wide.

In addition, the connection mechanism between the tip piece and the intermediate piece of the nozzle guide can be made by, for example, connecting the individual pieces with a universal joint, or by providing a through hole in the center of the piece and connecting them into one flexible shaft. It may be inserted and connected and integrated.

In addition to the above-mentioned embodiments, for example, a connector having a structure as shown in FIG. 3 or 4 can also be used as a connector for detachably connecting these various nozzle guides to a nozzle. . Note that the same parts are indicated by the same numbers.

In the embodiment shown in FIG. 3, instead of coupling the coupling cup 35 and the nozzle 16 by screwing as in the embodiment of FIG. It is fixed by a set screw 37 screwed in from the outside in the circumferential direction, and one connecting ball 32 of the connecting rod 30 is connected to the nozzle 1.
6, the connector is rotatable in an inclined manner and is detachably engaged with the connector.

In the embodiment of the coupling device shown in FIG. 4, instead of the coupling rod 30 as in the above embodiment, a coupling rod 28 having a protrusion 27 serving as an intermediate piece in the middle part is used. One connecting ball 29 corresponding to one connecting ball 32 of the rod 30 is connected to the connecting cup 3.
5, the nozzle 16 is rotatably and detachably secured to the tip of the nozzle 16. Note that 40 is the other connecting ball.

In addition, in consideration of the fact that the connecting cup 35 in the embodiments of FIGS. 1 and 4 loosens during use, a holding member such as a locking pin may be provided.

[Effect of idea]

As explained above, according to this invention, in a pipe cleaning device using a reverse injection nozzle, a nozzle guide that can be bent in the longitudinal direction is attached to the tip of the reverse injection nozzle with a connecting tool consisting of a connecting rod and a connecting cup. The nozzle guide is curved from the tip surface of the nozzle because it can be tilted and rotated using the nozzle and is detachably attached. Therefore, the radius of curvature of the nozzle guide is smaller than that of the conventional example in which the nozzle guide is connected to the tip of the handle that projects from the tip of the nozzle. Therefore, it can be used for cleaning complicated arrangements and narrow bends in pipes. Moreover, since the nozzle guide can be attached to the nozzle extremely easily without using any special equipment such as a crimping machine, it is possible to reduce the installation cost. Furthermore, since it is easy to install, users can easily replace it at the work site if the nozzle guide is damaged while cleaning the inside of the pipe or if it no longer curves smoothly. This eliminates the need to prepare a spare cleaning device, which has an extremely large practical effect.

In addition, if you prepare several types of nozzle guides with different numbers and dimensions of intermediate pieces in advance, you can select the most suitable nozzle guide according to the object to be cleaned and easily replace it on site, greatly increasing the efficiency of cleaning work. improves.

This invention is not limited to the above-mentioned embodiments; for example, changes may be made within the technical concept of this invention, such as changes in the number of intermediate pieces, the shape of the intermediate pieces or the tip piece, the connection mechanism of each piece, the shape of the connector, etc. Various modifications are of course possible.

[Brief explanation of the drawing]

FIG. 1 is a partially longitudinal side view of the pipe cleaning device according to this invention, and FIG. 2 is an explanatory diagram showing its mode of use.
FIGS. 3 and 4 are sectional views showing other embodiments of the connector for the pipe cleaning device according to this invention. 11... Hose, 12... Injection port, 13... Connection ball storage hole, 16, 17, 18... Nozzle, 20
... Nozzle guide, 24 ... Intermediate piece, 26 ... Tip piece, 28, 30 ... Connecting rod, 35, 35a ...
Connecting cup.

Claims (1)

[Scope of utility model registration request] A nozzle that has a connecting ball storage hole on the tip surface and is installed at the tip of a pressurized water supply pipe and cleans the inside of the tube by spraying pressurized water in reverse. A nozzle guide in which at least one intermediate piece provided on an end face portion and a tip piece connected to the intermediate piece are connected so as to be curved in the longitudinal direction, and guide the nozzle in a curved manner; A connecting rod that has one connecting ball on one end and the other connecting ball that is rotatably locked in the cavity at the other end, and one connecting ball that is passed through the connecting rod and inserted into the connecting ball storage hole of the nozzle. A pipe cleaning device comprising a connecting cup that can tilt and rotate a connecting ball and removably locks the connecting ball.