JPH07331657A - Method and equipment for cleaning underground penetrated pipe - Google Patents

Abstract

PURPOSE:To clean an unturned mandrel automatically and positively. CONSTITUTION:In the cleaning method of an unturned mandrel at a time when the mandrel 12 penetrated into the ground is extracted, a plurality of brushes 9 turned while being brought into contact with the mandrel 12 are mounted or a plurality of water jets are formed. Mud adhering on the mandrel 12 is cleaned by these brushes 9 or water jets.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for cleaning a mandrel for pulling out a non-rotating mandrel penetrating into the ground.

[0002]

2. Description of the Related Art For example, by a crawler shown in FIG. 6, a mandrel having a head as shown in FIG. 7 and FIG. 8 at its tip is penetrated into the ground without rotating power, and a plastic sheet is buried in the ground. A known plastic drain construction method is known.

[0003]

However, in the above-mentioned construction method, the mud adhered to the mandrel when the mandrel was pulled out was lifted up to the surface of the ground, and the soil adhered to the mandrel was lifted high. It may peel off and fall at a certain position, resulting in an accident.

Generally, for removing mud from a rotating body such as an auger type, if a brush or the like is set as a cleaning device at a fixed position and is in contact with the rotating body, the rotating body itself will automatically remove the mud. It can be relatively easily devised as a device. However, in order to thoroughly clean the mud of the non-rotating mandrel, the cleaning device itself or an operator having the cleaning device needs to go around the mandrel and work, which is very inefficient work.

Therefore, it is an object of the present invention to provide a method and an apparatus for cleaning an underground penetration pipe which can automatically and reliably clean a non-rotating mandrel.

[0006]

According to the present invention, in a method of cleaning a mandrel for pulling out a non-rotating mandrel penetrating into the ground, a cleaning device for cleaning the mandrel is installed around the mandrel, The cleaning device rotates or moves to clean mud attached to the mandrel.

The cleaning device comprises a two-stage cleaning device having one or more brushes in the upper stage and a water jet in the lower stage.

Further, according to the present invention, in the mandrel cleaning device for pulling out the non-rotating mandrel penetrating into the ground, the rotating portion formed in a cylindrical shape is rotatably mounted inside the cleaning device main body, The tubular rotating part is provided with one or more brushes inside, and the cleaning device main body is provided with drive means for rotating the rotating part.

Then, one or more water jets are provided inside the rotating portion formed in a tubular shape.

Further, the number of rotations of the rotating part is synchronized with the drawing speed of the mandrel by automatic control.

Further, according to the present invention, in the mandrel cleaning device for pulling out the non-rotating mandrel penetrating into the ground, the mandrel is provided with rotating shafts which are orthogonal to the mandrel and symmetrically arranged on the peripheral surface of the mandrel. A plurality of rotating brushes are provided on the shaft, a drive device for driving the rotating shafts is provided, and a water jet for injecting water on the mandrel is provided below the rotating brushes.

[0012]

Since the present invention is constructed as described above, when the mandrel is pulled out, a water jet rotating around the mandrel is jetted, and a brush rotating around the mandrel cleans the mandrel. And
Due to the drawing speed of the mandrel and the width of the brush, the rotation speed of the rotating part is controlled in synchronization with the drawing speed so that there is no mud residue, so there is no mud residue.

Further, when the brush rotates around an axis orthogonal to the mandrel, the above synchronous control is unnecessary.

[0014]

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

In the drawings, members having the same function are designated by the same reference numerals, and description thereof is omitted.

In FIG. 1, the inside of the main body 1 of the cleaning device is formed in a cylindrical shape, and the rotating part 2 is freely rotatable inside the upper and lower bearings 3 and 4, the upper cover 6 and the lower cover 7 having a dust seal. Installed on.

Further, an inner gear is provided at the upper end inside the rotating part 2, and a brush 9 and a nozzle 10 for water jet are attached to the central part thereof. The passages 11b, 11a, and 11c are configured to supply water to the nozzle while the rotating portion 2 is rotating. The rotating unit 2 includes a motor 14, a pinion 15, and an inner gear 5, which are driving means provided in the main body.
Is provided and rotates around a mandrel 12 having a head 13 (FIGS. 7 and 8) at the tip. Here, reference numeral 2a,
Reference numeral 2b indicates an O-ring that prevents water leakage.

Therefore, referring to FIG. 2 and FIG.
When the rotating part 2 rotates around the mandrel 1 (a rectangular cross section in the illustrated example), the water jet from the nozzle 10 drops the mud adhering to the mandrel 12, and the brush cleans the remaining mud wet with water. Therefore, the mud is not lifted together with the mandrel 12.

Since the rotating speed of the rotating part 2 and the mandrel drawing speed are synchronized with each other by automatic control so as to satisfy the relationship shown below, the mud is continuously dropped by the brush width and spirally formed. It does not remain.

R = V / n × Δh where n is the number of brushes and nozzles V is the drawing speed of the mandrel m / min Δh is the width of the brush m R is the rotational speed of the device rpm The rotational control is based on the calculation result. The method used is any known method.

FIGS. 4 and 5 show another embodiment of the present invention, in which two shafts 26 perpendicular to the mandrel 12 are axially supported by a bearing 25 in the main body 21.
Reference numeral 6 is connected to a hydraulic motor 24 via a coupling 27.

The shaft 26 has a base 9a attached to it.
A plurality of brushes 9 each having a fixed shape are provided, and the tip of the brush 9 has a cross-sectional shape of the mandrel 12 (square in the illustrated example).
It is configured to follow. A plurality of water jets 23 are arranged below the mandrel 12 toward the mandrel 12.

The operation is similar to that of the above-described embodiment, but the rotation speed of the brush does not need to be synchronized with the drawing speed of the mandrel.

[0024]

Since the present invention is constructed as described above, it has the following excellent effects.

(1) When the mandrel is pulled out, the work site is less contaminated and efficient work can be performed.

(2) It is safe because mud does not drop from a high position.

(3) Cleaning of the mandrel is improved, and automatic material cutting and mounting of the plastic drain is possible.

[Brief description of drawings]

FIG. 1 is a side view of the overall configuration of a ground penetrating pipe cleaning device showing an embodiment of the present invention.

FIG. 2 is a schematic diagram showing an operating mode of the brush of FIG.

FIG. 3 is a schematic view showing an operation mode of the water jet of FIG.

FIG. 4 is a plan view of the entire configuration of a cleaning device for an underground penetration pipe showing another embodiment of the present invention.

5 is a side view of FIG.

FIG. 6 is a side sectional view showing an example of a conventional mandrel head.

7 is a front view of FIG.

FIG. 8 is a penetration / extraction device for an underground penetration pipe showing an example of a conventional technique.

[Explanation of symbols]

 1, 21 ... Cleaning device body 2 ... Rotating part 3, 4, 25 ... Bearing 5 ... Inner gear 6, 7 ... Cover 8 ... Dust seal 9 ... Brush 10 ... Nozzle 12 ... Mandrel 23 ... Water jet circuit 24 ... Hydraulic motor 27 ... Cup ring

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tadashi Korenaga No. 20 Shintomi, Futtsu City, Chiba Prefecture Nippon Steel Corporation (72) Inventor Tetsuya Akahoshi No. 20 Shintomi, Futtsu City, Chiba Prefecture Made in Japan (72) Inventor Toshiaki Yamashita No. 1 Tsukiko Hachiman-cho, Sakai City, Osaka Prefecture Inside Nippon Steel Co., Ltd. Sakai Steel Co., Ltd. Incorporated (72) Inventor Mikio Nakagawa Kashima Construction, 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Incorporated (72) Masayuki Miura 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Constructed Kashima Co., Ltd. (72) Inventor Hiroko Enomoto 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Inventor Takahiro Kawakami 1-2-1 Taito, Taito-ku, Tokyo Fudo Construction Co., Ltd. Inside the company (72) Inventor Tomohiro Isoda 1-2-1, Taito, Taito-ku, Tokyo Fudo Construction Co., Ltd. (72) Inventor Akira Akimoto 1-2-1 Taito, Taito-ku, Tokyo Fudo Construction Co., Ltd. (72) Inventor Tadaaki Nomura 1-4-25 Kitanocho, Kita-cho, Yao-shi, Osaka Prefecture Nishiki Castle Defense Co., Ltd. (72) Inventor Tadashi Kawase 1-4-25 Kitano-cho, Yao-shi, Osaka Prefecture Guardian Nishiki Castle Incorporated (72) Inventor Michihiro Kimura 1-4-25 Kitanocho, Yabu City, Osaka Prefecture

Claims (6)

[Claims] 1. A method of cleaning a mandrel for pulling out a non-rotating mandrel penetrating into the ground, wherein a cleaning device for cleaning the mandrel is installed around the mandrel, and the cleaning device rotates or moves to the mandrel. A method for cleaning an underground penetration pipe, which is characterized by cleaning adhered mud. 2. The method for cleaning an underground penetration pipe according to claim 1, wherein the cleaning device comprises one or more brushes and a water jet. 3. A mandrel cleaning device for pulling out a non-rotating mandrel penetrating into the ground, wherein a cylindrical rotating part is rotatably mounted inside a cleaning device body, and the cylindrical rotating part. A cleaning device for an underground penetration pipe, characterized in that one or more brushes are provided on the inside of the body, and drive means for rotating the rotating portion is provided on the main body. 4. The underground penetrating pipe cleaning device according to claim 3, wherein one or more water jets are provided inside the rotating portion formed in a tubular shape. 5. The underground penetration pipe cleaning device according to claim 3, wherein the number of rotations of the cylindrical rotating portion is synchronized with the drawing speed of the mandrel. 6. A mandrel cleaning device for pulling out a non-rotating mandrel penetrating into the ground, wherein the mandrel circumferential surface is provided with rotating shafts orthogonal to the mandrel, and a plurality of rotating brushes are provided on the rotating shafts. An apparatus for cleaning an underground penetration pipe, characterized in that a drive device for rotating the rotation shaft is provided, and a water jet for injecting water is provided under a rotating brush.