JPS6138711Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a lining nozzle device used for lining existing pipes such as water and sewerage pipes.

In-pipe treatment of existing pipes generally involves five processes: grinding scale with a sand flow, washing the inside of the pipe with spray water, drying the inside of the pipe with an air flow, painting the inside of the pipe with a mixed air flow of lining material, and drying the lining film with an air flow. It is being carried out.

In the past, in this type of pipe treatment work, the pipe P was moved a certain distance, for example, as shown in Figure 1.
A gap G is created by cutting every 100 m, and a sand jet nozzle Q is first attached to the end of the pipe to grind the scale inside the pipe.Next, the sand jet nozzle Q is replaced with a water jet nozzle W to clean the inside of the pipe. After drying with air, the nozzles are replaced in the order of lining material injection nozzle T and air injection nozzle S to complete one section of processing. When the treatment of one section is completed, each nozzle device is moved to the tube end of the next treatment section, and the same operation is repeated to advance the treatment section one by one. Moreover, the gap G created by cutting is connected by a flanged short pipe L after the treatment work is completed. Furthermore, in Figure 1,
Q is a sand supply device, W' is a water supply device, and T' is a paint supply device.

However, the above-mentioned treatment method has the drawback that it requires a lot of effort to replace each nozzle at the end of the tube, resulting in extremely low work efficiency and the inability to rationalize the work.

In addition, in order to ensure the flow rate of the conveying air necessary for processing a given section, that is, the sand jet flow or lining mixed air flow, at a desired value, a pressurized air source H with a considerably large capacity is required, and the It is extremely difficult to move a large pressurized air source H to the end of the tube. In particular, if the pipe P passes through a narrow space, it is extremely difficult to move the air source, and as a result, a long air hose is required, making it extremely difficult to dispose of the hose. .

The present invention aims to eliminate the above-mentioned drawbacks in this type of pipe lining treatment.
The nozzle device is inserted into the gap G created by cutting the pipe line into a certain processing section, and the sand, water, and lining material injection devices are removably inserted therein, and the desired conveyance is performed. The air flow is supplied from the pipe end of the pipeline by a high-pressure turbo fan, and when the treatment work for one section is completed, only the above-mentioned injection devices are moved to the pipe end of the next treatment section, and the main body of the nozzle device is moved to the pipe end of the next treatment section. The object of the present invention is to provide a nozzle device for lining a pipe, which can be used as a connecting pipe for a pipe gap G, thereby making it possible to significantly improve work efficiency.

The basic structure of the present invention consists of an interrupt insertion tube A consisting of a large-diameter flanged short tube with three flanged short nipples 1, 2, and 3 fixed in a row; A sand injection device B is removably inserted into the insertion tube A, and has a sand nozzle 5 at the tip and a sand accelerator 7 outside the mounting flange 6, and the short nipple 2 is inserted thereinto. A water injection device C which is removably inserted into the insertion tube A and has an injection nozzle 10 at its tip, and a short nipple 3.
A lining material injection device D is inserted into and detachably inserted into the insertion tube A, and has a lining material injection nozzle 13 at the tip and a lining material accelerator 15 disposed outside the mounting flange 14. This constitutes a nozzle device for lining pipes.

Hereinafter, the details will be explained based on an embodiment of the present invention shown in FIGS. 2 and 3.

FIG. 2 is a longitudinal cross-sectional view of the nozzle device for lining pipes according to the present invention, in which A is an insertion tube, B is a sand injection device, C is a water injection device, and D is a lining material injection device. The interruption insertion pipe A is a short flanged steel pipe with the same diameter as the pipe to be treated P, and three short flanged nipples 1, 2, and 3 are arranged at regular intervals on its upper wall. They are welded and fixed in a horizontal row.

The sand injection device B has a sand nozzle 5 fixed to the tip of a 20-25A mounting pipe 4, and a sand accelerator 7 provided outside the mounting flange 6. sand nozzle 5
into the insertion tube A, and connect flange 6 and flange 1.
By tightening a, it is removably fixed to the short nipple 1. Incidentally, the sand nozzle 5 is configured to rotate and emit the grinding sand B' in a conical form, and the accelerator 7 has three to five sand nozzles.
Compressed air 8 of approximately Kg/cm ² is added to the sand stream B', and the grinding sand B' is passed through the nozzle 5 as a jet stream.
It is released from the tip of the

The water injection device C is composed of a mounting pipe 9, a jet nozzle 10 fixed to the tip thereof, and a mounting flange 11. It is detachably fixed to 2.

The lining material injection device D includes a mounting pipe 12, a jet nozzle fixed to the tip thereof, and a mounting flange 1.
By inserting the nozzle 13 into the insertion tube A through the short nipple 3 and tightening the flange 3a and the flange 14, the short nipple 3 is
It is removably fixed to the The nozzle 13 is designed to spout the lining material in a conical shape while rotating it, and the accelerator 15 has three to five nozzles.
Kg/cm ² of compressed air 16 is added to the lining material D', and the lining material becomes atomized and passes through the nozzle 13.
It's being squirted out.

The sand accelerator 7 and the lining material accelerator 15
The amount of air supplied to the nozzle may be sufficient to smoothly eject sand B' or lining material D' from the nozzle, and the amount of air supplied to As will be described later, the airflow is forced into the insertion tube A from the rear of the insertion tube A through the treated tube section from a high-pressure turbofan M provided at the end of the tube P.

Next, the utilization of the pipe lining nozzle device according to the present invention will be explained.

As shown in FIG. 3, the pipe line P is divided into appropriate lengths, for example, about 100 to 150 m, and a gap G equal to the size of the insertion pipe A is formed. Then, insert the insertion tube A into the gap G, and insert each short tube nipple 1, 2,
3, a sand jetting device B, a water jetting device C, and a lining material jetting device D are inserted. Furthermore, a high-pressure turbo fan M is connected to the end of the pipe P. Next, a sand jet flow B' is ejected from the sand jet device B, and the sand jet flow B' is caused to flow for a predetermined period of time by the conveying air flow M' from the turbo fan M to grind the scale. Incidentally, if the pipe P to be treated has a large diameter, the scale may be roughly cut using a pig or the like, and the final grinding may be performed using a sand jet flow B'. When the grinding process by the sand jet flow B' is completed, the water jet device C is activated to clean the inside of the pipe, and the turbo fan M
The inside of the tube is dried by the air flow M′ from the inside of the tube. After drying is completed, the lining material injection device D is activated, and the paint layer adhering to the inner wall of the tube is swept forward by the conveying air flow M' from the turbo fan M, forming a lining film of a constant thickness on the inner surface of the tube. form.

When the lining treatment within the predetermined section is completed, the sand jetting device B, water jetting device C, and lining material jetting device D are removed and inserted into the interrupt insertion pipe A inserted into the pipe end of the next processing section. Also, after removing each jetting device B, C, D, each short nipple 1,
Blind flanges are attached to flanges 2 and 3, and the insertion pipe A is left as is as a part of the pipe line. In this way, the inner surfaces of all the pipes are processed while only the ejection devices B, C, and D are sequentially moved.

By using the pipe lining nozzle device according to the present invention, by simply moving the sand injection device B, lining material injection device D, etc. as described above, the air flow sent from the end of the pipe can be sequentially used as conveying air. Can perform in-tube processing. In this case, an extremely small amount of air flow is sufficient to supply the accelerators 7, 15 of each injection device B, D, and therefore the pressurized air source H' is also small.
Movement becomes much easier than before.

In addition, by leaving the interruption insertion pipe A of the nozzle device in the pipe line as it is, it is possible to save the trouble of reconnecting the gap G of the cut pipe line, and also to fix the supply source M of the conveying air M' The conveying air M' can be supplied using the passageway, making it possible to significantly improve work efficiency.

As mentioned above, the present invention has excellent practical utility.

[Brief explanation of the drawing]

FIG. 1 shows an overview of this type of conventional pipe lining treatment method. FIG. 2 is a longitudinal sectional view of the nozzle device for lining pipes according to the present invention. FIG. 3 shows an outline of the pipe lining treatment method using the nozzle device. A... Interrupt insertion tube, B... Sand injection device,
C... Water injection device, D... Lining material injection device, 1, 2, 3... Short nipple with flange, 4...
...Mounting pipe, 5...Sand nozzle, 6...Mounting flange, 7...Sand accelerator, 10...Water jet nozzle, 12...Mounting pipe, 13...Lining material jetting nozzle, 14...Mounting flange, 15 ...Lining material accelerator.

Claims (1)

[Scope of utility model registration request] An interrupt insertion tube A is formed by fixing three flanged short nipples 1, 2, and 3 in a row to a large diameter short tube with flanges, and an insertion tube A is formed by inserting the short nipples 1 through the flanged short nipples 1, 2, and 3.
A sand injection device B, which is removably inserted into the interior, has a sand nozzle 5 at its tip and a sand accelerator 7 outside a mounting flange 6, and a short nipple 2 is inserted into the insertion tube. A water injection device C is removably inserted into the insertion tube A and has a jet nozzle 10 at its tip, and a water injection device C is removably inserted into the insertion tube A through the short nipple 3, and a lining material is installed at the tip. A nozzle device for lining a pipe, comprising a jetting nozzle 13 and a lining material jetting device D comprising a lining material accelerator 15 disposed outside a mounting flange 14.