JPH0315675Y2 - - Google Patents

Description

[Detailed explanation of the invention] The present invention is designed to provide water collection holes and drainage holes in facilities that collect and drain groundwater by boring water collection holes and drainage holes underground as countermeasures for landslide areas, etc. When water scale, etc. accumulates inside the hole-preserving pipe that is inserted inside the pipe, and the collection and drainage function deteriorates,
This invention relates to improvements to a nozzle for cleaning collection and drainage holes used to clean the inside of the pipe.

The collection/drainage facility installed as a countermeasure work for landslide areas, etc. mentioned above is as shown by the broken line in Figure 1, by boring horizontal water collection holes 1 in the ground in the area where landslides occur. In order to maintain holes in the water collection hole 1, a pipe wall 2 is installed as shown in FIG.
A hole-maintaining pipe 2 such as a gas pipe or a PVC pipe with permeation holes 21 for water permeation drilled at appropriate intervals is inserted into the hole, and groundwater underground is collected through the water collection hole 1. Water is collected in a well 3, and a drainage hole 4 is bored in the same way from this water collection well 3, and a hole-holding pipe 2 formed in the same manner as the pipe 2 described above is inserted into the drainage hole 4. It is constructed so that groundwater collected in a water collection well 3 through a water collection hole 1 is discharged into a river or the like through a drainage hole 4.

Over the years, such water collection and drainage facilities have built up limescale (scale), Sediment, plants, bacteria, etc. accumulate and multiply, clogging the inside of the hole maintenance pipe 2 and clogging the water permeation holes 21, as shown in Figure 3. .

When this happens, connect the tip side of the pressure hose b to the base end (rear end side) of the nozzle a for cleaning the collection/drainage hole, as shown in Figure 5. Insert it into the hole-holding pipe 2,
An ultra-high-pressure pump connected to the base end of the pressure-resistant hose b sends 200 to 300 kg of ultra-high pressure water per square meter, and sprays it from the injection hole 50 provided in the nozzle a to remove limescale accumulated in the pipe 2.・We are trying to wash out the sediment.

Therefore, in order to clean the collection and drainage holes by jetting ultra-high pressure water using the nozzle a for cleaning the collection and drainage holes, it is necessary to insert the nozzle a deep into the hole maintenance pipe 2 one after another. There is also the problem that the work to do this is difficult, and the number of permeable holes 21 provided in the pipe wall 20 of the pipe 2 is multiple at intervals in the circumferential direction at the same cross-sectional position, as shown in Fig. 4. Therefore, the positions of the injection holes 50 provided on the outer peripheral surface of the nozzle a do not match the positions of the water permeable holes 21 provided in the pipe wall 20 of the pipe 2 at intervals in the circumferential direction. Water permeation hole 2 that cannot be cleaned
There is a problem that 1... remains. In addition, in order to solve this problem, if the part of nozzle a in which the injection hole 50 is provided rotates with respect to the main body of nozzle a, the seal between the rotating part and the main part of nozzle a will be broken. Unfortunately, another problem arises in that the ultra-high pressure water sent to the injection hole 50 comes out from all over the circumference of the nozzle a.

The present invention was developed in order to solve these problems.In order to ensure that all the permeable holes provided in the wall of the pipe for hole maintenance can be cleaned, injection holes are provided. A new technology that can effectively prevent ultra-high pressure water from leaking around the circumference while automatically rotating the part, and also makes it easier to insert the nozzle into the pipe for hole maintenance. The purpose of this invention is to provide a nozzle for cleaning collection and drainage holes.

For this purpose, the nozzle for cleaning the collection/drainage hole according to the present invention is equipped with a connecting cylinder part on the rear end side to which a pressure-resistant hose is connected, and a water guide chamber communicating with the inner cavity of the connecting cylinder part is provided inside. The front half of the nozzle main body is formed into a cylindrical part, a communication port communicating with the water introduction chamber is formed at an intermediate part in the axial direction of the outer peripheral surface of the cylindrical part, and an outer cylinder is formed on the outer periphery of the cylindrical part. It is rotatably fitted and fixed in the axial direction by a head attached to the front end side of the shaft cylinder part, and the above-mentioned communication is made at the fitting surface between the inner peripheral surface of the outer cylinder and the outer peripheral surface of the shaft cylinder part. An annular flow path communicating with the communication port is formed in the portion that overlaps with the port,
The outer circumferential surface of the outer cylinder has an injection hole that communicates with the annular flow path via a conduit that is substantially perpendicular to the axis of the outer cylinder when viewed from the side, and an injection hole that is inclined rearward with respect to the axis of the outer cylinder. an injection hole communicating through a conduit, and at least one of the conduits is provided eccentrically with respect to the axial center line when viewed from the axial direction; It is characterized in that annular grooves are provided at the front and rear positions of the annular flow path, respectively, and the annular grooves are communicated with pores provided on the outer circumferential surface of the outer cylinder via a conduit.

Next, an example of implementation will be described in detail with reference to the drawings.

FIG. 6 shows the entire nozzle a for cleaning the collection and drain holes according to the present invention, as seen diagonally from above. In the figure, 5 is the main body of the nozzle, 6 is the outer cylinder,
7 indicates the head. The nozzle main body 5 has a connecting fitting attached to the tip of the pressure hose b, as shown in FIG. 9, on the rear end side (right end side in the figure).
A connecting cylindrical portion 5a for continuous connection by threading the connecting cylindrical portion 5a is integrally formed, and a water introducing chamber 51 communicating with the inner cavity of the connecting cylindrical portion 5a is formed inside. be. The nozzle main body 5 has a front half thereof formed into a cylindrical shaft portion 52 having a reduced diameter, and a threaded portion 52a that is further reduced in diameter and projects forward is installed at the front end of the cylindrical shaft portion 52. It has been set up. A communication port 53 communicating with the water introduction chamber 51 is provided at an intermediate portion in the axial direction (back and forth direction) on the outer circumferential surface of the shaft cylinder portion 52.
are arranged equally in the circumferential direction (No. 10).
figure).

6 is an outer cylinder fitted on the outer periphery of the shaft cylinder part 52;
The screw portion 52a is rotatably fitted to the cylindrical shaft portion 52 with its axial center line aligned with the axial center line W of the nozzle main body portion 5, and is installed at the front end of the cylindrical shaft portion 52.
It is fixed in the axial direction by a head 7 screwed onto the holder. A bearing 90 is interposed between the inner peripheral surface of the outer cylinder 6 and the outer peripheral surface of the shaft cylinder portion 52 at the rear end side of the outer cylinder 6, and receives a force in a direction perpendicular to the axial direction. At the front end side of the outer cylinder 6, a bearing 91 receives thrust in a direction perpendicular to the axial direction and in the axial direction.
is interposed, and the bearing 91 is connected to the head 7.
is supported via the bearing retainer 92,
The outer cylinder 6 is fixed in the axial direction so as to be freely rotatable.

Then, the bearing 90 and the bearing 91
The fitting surface between the inner circumferential surface of the outer tube 6 and the outer circumferential surface of the shaft tube portion 52 has a portion that overlaps with the communication port 53 provided on the outer circumferential surface of the shaft tube portion 52. An annular flow path 6a communicating with the communication port 53 is formed. In the illustrated example, this annular flow path 6a is
Although it is formed by hollowing out the inner peripheral surface of the outer cylinder 6,
It may be formed by hollowing out the outer circumferential surface of the shaft cylinder portion 52.

Reference numeral 61 denotes an injection hole provided on the outer circumferential surface of the outer cylinder so as to inject ultra-high pressure water in a direction substantially perpendicular to the aforementioned axis W in a side view, as shown in FIG. When viewed from the direction of the axis W, a small shelf surface 61a orthogonal to the vertical imaginary line X is provided on the outer peripheral surface of the outer cylinder 6 at a position offset from the axis Y of the outer cylinder 6, for example. As shown in FIGS. 6 and 8, it is formed to be slightly inclined rearward in side view, and is opened within the shelf surface 61a. As shown in FIG. 9, the injection hole 61 is substantially perpendicular to the axial center line W in the side view of the annular flow path 6a, and is oriented in a tangential direction from the annular flow path 6a when viewed from the axial direction. They are communicated via a conduit 60 along a perpendicular imaginary line X at a position eccentric with respect to the axis W (FIG. 10).

63 is the aforementioned axial center line W on the outer circumferential surface of the outer cylinder.
As shown in FIGS. 6 to 8, the injection holes are provided on the outer circumferential surface of the outer cylinder 6 so as to be inclined rearward when viewed from the side and inject ultra-high pressure water in the radial direction. A V-shaped cut groove 65 is provided on a sloped surface 65a facing rearward of the cut groove 65. The injection hole 63 is inclined rearward with respect to the axis W in a side view, as shown in FIG. 9, with respect to the annular flow path 6a, and as shown in FIG. Similarly to the above-mentioned pipe line 60, they are communicated via a pipe line 62 provided so as to face in the tangential direction from the above-mentioned annular flow path 6a.

Note that the pipe line 60 and the pipe line 62 are provided so as to be eccentric with respect to the axis W when viewed from the axial direction and to face in the tangential direction from the annular flow passage 6a.
This is to cause the outer cylinder 6 to rotate relative to the shaft cylinder part 52 due to the reaction force when ultra-high pressure water is injected from the injection holes 61 and 63, which are the opening ends of the cylinders 61 and 62. In some cases, only one of the pipes is eccentric.

95, 95 are O-rings serving as seals provided on the fitting surface between the inner circumferential surface of the outer cylinder 6 and the outer circumferential surface of the shaft cylinder portion 52, and O-rings 95, 95 are provided on the fitting surface in front and behind the aforementioned flow path 6a. It is installed at the location.

Reference numerals 8 and 8 denote annular grooves provided in the fitting surface at positions in front and behind the flow path 6a, respectively, with the flow path 6a being the base point and the grooves being located in the front and rear positions of the O-rings 95 and 95, respectively. It is provided in Although the annular grooves 8, 8 are formed by hollowing the inner circumferential surface of the outer cylinder 6 in the illustrated example, they may be formed by hollowing the outer circumferential surface of the shaft cylindrical portion 52. The annular grooves 8, 8 are communicated with pores 80, 80 provided in the outer circumferential surface of the outer cylinder 6, respectively, via thin pipe lines 81, 81.

Next, to explain the function and effect, the nozzle for cleaning the collection/drainage hole according to the present invention constructed as described above is attached to the tip of the pressure hose b as shown in FIG. When inserted into the hole-maintaining pipe 2 fitted in the collection/drainage holes 1 and 4 by pushing the The reaction force when spraying diagonally backward from the hole-keeping pipe 2 automatically propels the jet toward the back of the hole-keeping pipe 2. This makes it easier to insert the .
The ultra-high pressure water that is injected diagonally backward from the injection hole 63 and the ultra-high pressure water that is ejected from the injection hole 61 in a direction substantially perpendicular to the axis W when viewed from the side are accumulated on the inner wall surface of the pipe 2. The water scales clogging the water permeable holes 21 of the pipe 2 are removed by washing, but the outer cylinder 6 provided with the injection holes 61 and 63 is cleaned at least one of the injection holes 61 and 63. The reaction force of ultra-high pressure water spouted from the nozzle main body 5
Since the outer periphery of the shaft cylindrical portion 52 provided in the pipe 2 rotates, the positions of the injection holes 61 and 63 rotate around the axis W of the nozzle main body 5. Inner wall surface and pipe wall 2 of pipe 2
The water permeable holes 21 provided at intervals in the circumferential direction are cleaned completely. Also,
Since the outer cylinder 6 rotates with respect to the shaft cylinder part 52,
A part of the ultra-high pressure water sent to the injection holes 61 and 63 described above will enter into their fitting surfaces;
When reaching the annular grooves 8, 8 arranged in front and rear of the annular channel 6a which communicates with the annular channel 6a and provided on the fitting surface, a conduit 81, which communicates with the annular grooves 8, 8, is formed.
81, a pore 80 provided on the outer peripheral surface of the outer cylinder 6,
80 in the direction of cleaning the inner wall surface of the pipe 2 and the water permeable hole 21, and the ultra-high pressure water that enters the fitting surface outside of the annular grooves 8, 8 is extremely reduced. , the problem is that ultra-high pressure water spews out from the front and rear ends of the mating surface towards the bearings 90, 91, and from there it scatters around the four circumferences. It becomes possible to resolve the problem.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram of the collection/drainage facility, Figure 2 is a longitudinal side view of the collection/drainage hole fitted with a pipe for hole maintenance,
Figures 3 and 4 are explanatory diagrams of the condition in which limescale has accumulated in the collection and drainage hole of the above, Figure 5 is an illustration of the cleaning work of the collection and drainage hole of the above, and Figure 6 is the collection and drainage according to the present invention. A perspective view of the hole cleaning nozzle, FIG. 7 is a plan view of the same nozzle, FIG. 8 is a side view of the same nozzle, and FIG.
The figure is a vertical side view of the same nozzle, and FIG. 10 is a vertical rear view of the same nozzle taken along line A-A in FIG. 9.
FIG. 11 is a longitudinal cross-sectional rear view of the same nozzle taken along the line B-B in FIG. - It is an explanatory diagram of a drainage hole. Explanation of drawing symbols, a...Nozzle, b...Pressure resistant hose, b'...Connecting fittings, 1...Water collection hole, 2...Pipe, 20...Pipe wall, 21...Water hole, 22...
Drainage hole, 3... Water collection well, 5... Nozzle main part,
5a...Connection tube part, 50...Injection hole, 51...Water guide chamber, 52...Shaft tube part, 52a...Threaded part, 53
...Communication port, 6...Outer cylinder, 6a...Flow path, 60...
... Pipe line, 61 ... Injection hole, 61a ... Shelf surface, 62
... Pipe line, 63 ... Injection hole, 65 ... Cut groove, 6
5a... Inclined surface, 7... Head, 8... Annular groove,
80...Pore, 81...Pipe line, 90...Bearing, 91...Bearing, 92...Bearing holder, 95...O-ring, W...Axis center line, Y...Axis center, X... virtual line.

Claims (1)

[Scope of utility model registration request] Connection cylinder part 5a to which pressure-resistant hose b is connected to the rear end side
The front half side of the nozzle main body part 5, which is provided with a water introduction chamber 51 that communicates with the inner cavity of the connecting cylinder part 5a, is formed into a shaft cylinder part 52, and the outer circumferential surface of the shaft cylinder part 52 in the axial direction A communication port 53 communicating with the water introduction chamber 51 is formed in an intermediate portion, an outer cylinder 6 is rotatably fitted around the outer periphery of the cylindrical shaft portion 52, and a head is attached to the front end side of the cylindrical shaft portion 52. 7 fixes the hand in the axial direction,
A portion of the fitting surface between the inner circumferential surface of the outer cylinder 6 and the outer circumferential surface of the shaft cylinder portion 52 that overlaps with the communication port 53 includes:
An annular flow path 6a communicating with the communication port 53 is formed, and the annular flow path 6a is formed on the outer peripheral surface of the outer cylinder 6.
and an injection hole 61 that communicates through a conduit 60 that is substantially perpendicular to the axis W of the outer cylinder 6 in side view, and an injection hole 61 that communicates through a conduit 62 that is inclined rearward with respect to the axis W. An injection hole 63 is formed, and at least one of the pipe lines 60 and 62 is provided eccentrically with respect to the axis W when viewed from the axial direction, and the annular flow of the fitting surface Annular grooves 8, 8 are provided at the front and rear positions of the channel 6a, respectively, and the annular grooves 8, 8 are provided in the outer peripheral surface of the outer cylinder 6.
1. A nozzle for cleaning a collection/drainage hole, characterized in that the nozzle is communicated with the drain hole through pipes 81, 81.