JP3516980B2 - How to clean sewer sewers - Google Patents

Description

Detailed Description of the Invention

A. Object of the invention (1) Industrial field of application The present invention relates to a cleaning method for mechanically removing sludge accumulated on the bottom of a sewer pipe.

(2) Prior Art As a method of unmanned or mechanically removing deposits in a sewer pipe without relying on human power, a nozzle-shaped nozzle device is arranged in the pipe and the nozzle device is attached to the nozzle device. BACKGROUND ART Pressure water flow is supplied from the ground portion via a hose to generate a jet flow, and the jet flow removes deposits. Then, this hose is inserted through a human hole on the downstream side, and the nozzle device is moved from the upstream side to the downstream side as the hose is wound. However, according to this conventional method, the jet flow is not directionally jetted toward the target sludge on the pipe bottom, the efficiency is poor, and the pressure water generation equipment for driving the jet flow is large, Increasing costs are inevitable. In addition, there are various problems that the hose is buried in the sludge that has been washed away and becomes a resistance, and that sudden water discharge cannot be dealt with.

(3) Problems to be Solved by the Invention The present invention has been made in view of the above circumstances, and in a method for mechanically removing sludge on a pipe bottom, the structure is simplified and the sludge on the pipe bottom is simplified. It is an object of the present invention to provide a method for cleaning a sewer pipe, which can efficiently perform a removal work toward a sewage system, and which is efficient and has a low equipment cost.

B. Configuration of the Invention (1) Means for Solving Problems The method for cleaning a sewer pipe of the present invention adopts the following configuration (technical means) in order to achieve the above object. That is, the water flow
There is a specified gap with the wall of the sewer pipe that flows down.
A method of cleaning a sewer pipe with a stopper installed,
At least the plug should be hollow and substantially cylindrical.
Rubber that can be expanded and contracted by the fluid enclosed inside
With a bag; hold it from the top of this rubber bag to expand the rubber bag
A substantially rigid guide frame that can be correspondingly expanded;
The rubber bag of the plug placed in the sewer pipe.
Adjusting the cross-section by adjusting tension and contraction, increasing the upstream head
And moving this plug to the downstream side, the wall of the pipe
Downstream with the water flow discharged from the gap between the surface and the plug
It is characterized by sweeping the sediment in the sewer pipe of the area . In this structure, the cross section of the sewer pipe has a circular cross section in the following embodiments, but other cross sectional shapes such as a square cross section are also possible.

(2) Action In the cleaning method according to the present invention, the cross section of the flowing water is reduced by the plug placed in the running water, and the flow velocity is increased due to the reduction of the cross section, so that the cleaning force for the deposit is obtained.

(3) Example An example of a method for cleaning a sewer pipe according to the present invention will be described with reference to the drawings. 1 to 7 show an embodiment of the cleaning method of the present invention. That is, FIG. 1 shows the overall configuration, and FIGS.
Shows a partial configuration of each part of the embodying apparatus.

In FIG. 1, P is a target sewer pipe, Q1 is an upstream manhole of the sewer pipe P, and Q2 is a downstream manhole. Sludge T is accumulated at the bottom of the sewer pipe P.

Therefore, the cleaning device S applied to the method of the present embodiment is arranged in the sewer pipe P over the upstream side human hole Q1. In the following description, the front side means the downstream side, and the rear side means the upstream side.

This cleaning device S comprises a movable plug 1, a tow rope 2 connected to the movable plug 1, and a tow rope 2.
And a rubber tube 5 as an air conduit for supplying air to the inflatable bag inside the moving stopper 1 and an air supply device 6.

Moving Plug 1 FIGS. 2 to 7 show the detailed structure of the moving plug 1. As shown in the figure, the movable plug 1 is composed of a guide frame 10 having a substantially semi-cylindrical shape and a rubber bag 11 inserted and held in the guide frame 10. Furthermore, it includes a fixture 13 attached to the front of the guide frame 10. Thus, the guide frame 10 retains rigidity and has some flexibility, and the rubber bag 11
And slidably contact the inner wall surface of the sewer pipe P. The rubber bag 11 can be inflated and contracted by the air pressure sealed inside, and closes the cross section of the pipe line P.
A discharge flow is generated due to the shape of the lower surface.

Guide frame 10 (see FIGS. 2 to 5) The guide frame 10 includes a peripheral frame body 15, a shaft frame body 16 and a shaft rod 17.
And are joined in a grid to form a guide frame body, and have a semicylindrical shape as a whole. Steel members are used for these members from the viewpoint of supplementary rigidity / elasticity and assemblability, but the use of other metal materials or synthetic resin materials is not excluded.
2 and 3 show a normal state of the guide frame 10, that is, a state when no external force is applied. The surrounding frame body 15 is
In this embodiment, it is composed of three parts (front part 15a, intermediate part 15b, rear part 15c) and is made of thin spring steel. Therefore, it has moderate elasticity and allows outward spread. Surrounding frame 1
5 may be composed of two parts or four or more parts.
Furthermore, the one thing is not excluded. Shaft frame body 16
Has a flat band shape and is fixed to the outside of the three peripheral frame members 15 along the axial direction of the cylinder. The rear portion projects from the peripheral frame body 15. In the present embodiment, four locations are arranged at symmetrical positions and at substantially equal intervals. The shaft rod 17 is formed of a circular tube body or a rod-shaped body, and is fixed to both ends of the peripheral frame body 15 in the axial direction. The front portion and the rear portion thereof are projected from the peripheral frame body 15 and are bent in a semi-cylindrical central direction. 18 is a guide frame 10
Is a stopper for locking the rubber bag 11 protruding from the inner surface of the.

As described above, the peripheral frame body 15 has an appropriate elasticity and allows outward expansion. As shown in FIG. 3, the solid line indicates the normal state of the guide frame 10, in other words, nothing. The load state is shown, and the chain line shows a state where it is restrained by the inner wall of the sewer pipe P by receiving an external force from the inside. In the normal state of the guide frame 10, or when contracted, the guide frame 10 passes through the opening of the human hole Q as a standard. What is more characteristic is that the rollers 20 are arranged on the guide frame 10. In this embodiment, the roller 20 includes the front and rear peripheral frame members 15 (15).
a, 15c) is rotatably mounted via a mounting rib 21 fixedly provided, but other modes are not excluded. Further, in the illustrated example, three locations are arranged at symmetrical positions in the circumferential direction, but it may be five locations or more. The roller 20 has an abacus shape, and an edge portion thereof has an acute angle shape. As a result, it freely rolls in the axial direction of the pipe, and the moving plug 1
In addition, it exhibits a multi-function such as preventing the lateral displacement of the movable plug 1 in the direction of the peripheral wall of the pipe and preventing the so-called rolling of the movable plug 1 from occurring.

Rubber bag 11 (see FIGS. 6 and 7) The rubber bag 11 is held by the guide frame 10 and is inflated and contracted by the pressure of the air enclosed therein. When inflated, the rubber bag 11 has a substantially cylindrical shape having a flat bottom surface 23. The upper outer peripheral surface and the front and rear surfaces are restrained and held in the guide frame 10. In order to enhance the restraint property, the convex portion 24 that fits in the lattice space of the guide frame 10 is formed. The rubber bag 11
Is connected to the rubber tube 5 via the rear air intake 25.

Regarding the relation between the rubber bag 11 and the guide frame 10, the guide frame 10 and the rubber bag 11 are separate bodies,
The guide frame 10 is assembled to each other and holds the rubber bag 11, but expands outward due to the expansion action of the rubber bag 11. That is, the state of the rubber bag 11 in FIGS. 6 and 7 corresponds to the expanded state (indicated by a chain line) of the guide frame 10 in FIG.

Fixture 13 (See FIGS. 2 and 3) The fixture 13 comprises a ring 13b and a plurality (6 in this embodiment) of chain bodies 13b fixed to the ring 13a. The other end of the chain 13b is connected to the guide frame 10. The hook 30 is fixed to the ring 13a, and the end portion of the tow rope 2 is fixed.

Tow rope 2 (see FIG. 1) The tow rope 2 has one end attached to the moving plug 1 through a fixture 13, and the other end guided to the ground portion to interlock with the tow adjustment mechanism 3. In the disposition of the tow rope 2, an appropriate guide tool, for example, a pulley 32 is arranged at the corner of the human hole Q1.

Traction adjustment mechanism section 3 (see FIG. 1) The traction adjustment mechanism section 3 is mainly composed of a so-called winch mechanism, and pays out and winds up the traction rope 2. The tension is also adjusted by the traction adjusting mechanism section 3.

Rubber Tube 5 / Air Supply Device 6 (See FIG. 1) The rubber tube 5 has one end connected to the rubber bag 11 and the other end connected to the air supply device 6. The air supply device 6 is arranged above the ground, generates compressed air, and freely adjusts the magnitude of the air pressure.

Next, a method of cleaning the inside of the sewer pipe P of this embodiment, which is carried out using the above-mentioned cleaning device S, will be described. Hereinafter, description will be given based on the work procedure. 8 and 9
Indicates its operating state.

(1) From the manhole Q1 on the upstream side of the sewer pipe P to be cleaned, the movable plug 1 is attached to the guide frame 10 and the rubber bag 1.
Disassemble into 1 and carry in. That is, the guide frame 10 normally passes freely through the opening of the human hole Q1 and is carried into the human hole Q1 where the rubber bag 11 to which the rubber tube 5 is attached in advance.
It is assembled with. In addition, the traction adjustment mechanism section 3 is provided on the ground.
In addition, the air supply device 6 is arranged.

(2) Assemble the movable bag 1 by holding the rubber bag 11 in a predetermined state in the guide frame 10 to assemble it, and insert the rubber bag 11 into the sewer pipe P with the rubber bag 11 slightly expanded. . Next, the moving plug 1 and the traction adjusting mechanism 3 arranged on the ground are connected via the traction rope 2.

(3) Compressed air is supplied to the rubber bag 11 from the air supply device 6, the guide frame 10 is expanded outward, and its roller 20 is pressed against the pipe wall of the sewer pipe P. At this time, the rubber bag 11 pushes up the main moving plug 1 by its buoyancy.

(4) When the flowing water flowing down the sewer pipe P maintains a sufficient water level, in other words, when the amount of flowing water is large, the moving water is abruptly stopped by the moving plug 1, and the moving plug is From the cross-sectional reduced portion H below the rubber bag 11 of No. 1, it flows out as a discharge flow. By this discharge flow, the deposit T at the bottom of the sewer pipe P is swept out downstream.

(5) While the tension is adjusted by the operation of the traction adjusting mechanism section 3, the traction rope 2 is unrolled and the movable plug 1 is moved to the downstream side. With this movement, sewer pipe P
The deposit T inside is pushed out to the downstream side. At this time,
The rollers 20 of the guide frame 10 prevent lateral displacement and stably guide this movement. Furthermore, since the rubber bag 11 receives water pressure on its rear surface and a discharge flow having a high flow velocity is generated on its bottom surface, it receives a large force and vibration, but this force and vibration force are applied to the guide frame 10. Transmitted, guide frame 1
0 counters these forces due to its complementary stiffness.

(6) When the cleaning is completed, the air in the rubber bag 11 is evacuated and the rubber bag 11 is contracted to secure the cross-sectional area of running water. Then, the pulling rope 2 is wound up by the pulling adjustment mechanism unit 3, the moving plug 1 is pulled back to the original upstream side human hole Q1, and these members are collected.

(7) While the work is in progress, when the water level rises due to sudden water discharge, that is, when it is necessary to quickly flush the running water to the downstream side, the air in the rubber bag 11 of the main moving plug 1 is evacuated to remove the running water. Secure the cross section and treat the water discharge.

When the running water level in the sewer pipe P is low,
Or rubber bag 1 that covers the entire cross section when the amount of flowing water is small
Using 1 is done as follows. The rubber bag 11 is inflated and the lower surface of the rubber bag 11 is pressed against the bottom surface of the sewer pipe P to block the sewer pipe P to stop running water and raise the water level on the upstream side to store water. When a sufficient amount of stored water is obtained, the rubber bag 11 is contracted, and the lower surface of the rubber bag is closed by the sewer pipe P.
A running water cross section is secured at the bottom of the pipe and the sludge is cleaned by the discharge flow flowing out of this running water cross section. When the rise of the water level is small, a means for closing the inflow portion of the human hole Q1 on the upstream side and then pouring water into the human hole Q1 to increase the water flow is also adopted.

According to this embodiment described above, the following effects are exhibited. In the method for cleaning the sewer pipe of the present invention of the present embodiment, a device having a simple structure is used, and since the removal work can be performed toward the sludge on the pipe bottom, the cost can be reduced and the equipment cost can be reduced. Efficient work can be performed.
In addition, by adjusting the expansion and contraction of the rubber bag 11,
The flow-down cross-sectional area can be adjusted freely, which allows
The cleaning power can be changed. Further, it is possible to easily deal with sudden water discharge. According to the apparatus used in the present embodiment, the moving plug 1 is disassembled into the guide frame 10 and the rubber bag 11, so that it can be easily carried into the human hole and the sewer pipe P from the opening of the human hole Q. be able to. Further, since the guide frame 10 is expanded by the rubber bag 11, it easily fits the inner diameter of the sewer pipe P. Further, the roller 20 of the guide frame 10 ensures the stability of the moving stopper 1.

In this embodiment, the rubber bag 11 has a true cylindrical shape with a flat lower surface, but the following form shown in FIGS. 10 and 11 can be adopted in consideration of the flow. In this rubber bag 11A, a large inclined surface 27 is formed on the rear surface and a small inclined surface 28 is formed on the front surface.

The present invention is not limited to the above embodiments, and various design changes can be made within the scope of the basic technical idea of the present invention. That is, the following aspects are included in the technical scope of the present invention. 1) In the above embodiment, application to a sewer pipe with a circular cross section is described, but application to a short cross section is naturally possible. In this case, the rubber bag is expanded and contracted in the vertical direction while keeping the width constant.

C. EFFECTS OF THE INVENTION According to the method for cleaning a sewer pipe of the present invention, it is possible to use a device having a simple structure and to carry out the removal work directionally toward the sludge at the pipe bottom, so that the equipment cost can be reduced. , Can carry out efficient work. Further, since the moving stopper is disassembled into the guide frame and the rubber bag, it can be easily carried into the human hole and the sewer pipe from the opening of the human hole. Since the guide frame is expanded by the rubber bag, it easily fits the inner diameter of the sewer pipe. By controlling the expansion and contraction of the rubber bag, the flow-down cross-sectional area can be adjusted freely, and thus the cleaning force can be changed. It is easy to deal with sudden flooding.

[Brief description of drawings]

FIG. 1 is a conceptual configuration diagram showing an entire embodiment of a method for cleaning a sewer pipe of the present invention.

FIG. 2 is a side view of a guide frame that constitutes a moving plug of the cleaning device.

FIG. 3 is a view on arrow III in FIG.

FIG. 4 is a partial configuration diagram of a guide frame (enlarged view of IV portion in FIG. 2).

5 is a view on arrow V in FIG.

FIG. 6 is a partial cross-sectional side view of a rubber bag that constitutes a movable stopper.

FIG. 7 is a view on arrow VII in FIG.

FIG. 8 is a schematic diagram showing the behavior in the sewer pipe that is performed using the cleaning device.

9 is a sectional view taken along line IX-IX in FIG.

FIG. 10 is a side view showing another form of the rubber bag.

FIG. 11 is a view on arrow IX in FIG.

[Explanation of symbols]

P ... Sewer pipe, T ... Deposit, S ... Cleaning device, 1 ... Moving plug, 10 ... Guide frame, 11 ... Rubber bag, 20 ... Roller

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Eki Akimoto 7-7 Ushizawa-cho, Iruma City, Saitama Prefecture (72) Inventor Hamao Yamashiro 213-10 Sasai, Sayama City, Saitama Prefecture Sayama Green Heights 5-402 (56) Reference Document Patent 143261 (JP, C2) (58) Fields investigated (Int.Cl. ⁷ , DB name) E03F 9/00

Claims (2)

(57) [Claims] 1. A sewer pipe in which water flows down,
Sewer pipe with a plug located at a certain gap from the wall
The method of cleaning of claim 1, wherein the plug is at least hollow and substantially cylindrical.
Rubber that can be expanded and contracted by the fluid enclosed inside
With a bag; hold it from the top of this rubber bag to expand the rubber bag
A substantially rigid guide frame that can be correspondingly expanded;
Rannahli, expansion and contraction of the rubber bag of the plug body disposed in the sewer sewer
By adjusting the cross section to increase the water head on the upstream side, and moving this plug to the downstream side, the water flow discharged from the gap between the wall surface of the pipe and the plug is used in the sewer pipe in the downstream region. A method for cleaning a sewer pipe, characterized in that the sediment of the above is washed away. 2. The bottom surface of the lower portion of the rubber bag has a flat shape.
The plug body forms a gap with the bottom wall surface of the pipe.
The method for cleaning a sewer pipe according to 1.