JPH03202318A - Manufacture of internally lined pipe - Google Patents

Abstract

PURPOSE:To make it possible to efficiently produce an internally lined pipe with no waste of material by a method wherein resin mortar for lining and hardener are fed through separate feed routes to a mixing part, which is provided at an arm member, and mixed with each other in order to produce a lining layer. CONSTITUTION:In order to mix resin mortar A1 and hardener A2 with each other in a mixing part 30, firstly an on-off valve 302 is opened by means of the pressure of controlling fluid so as to introduce the resin motor A1 in a mixing passage 309. By opening an on-off valve 312, hardener A2 is introduced in the mixing passage 309. The resin mortar A1 and the hardener A2 are mixed together here and fed to a discharge nozzle 32 communicating with the mixing passage 309. The resin mortar A1 fed from a storage tank 34A and the hardener A fed from a storage tank 34B are mixed with each other in the mixing part 30, which is provided at the tip of an arm member 31, so as to be delivered in liquid drops or running liquid from the discharge nozzle 32, which is provided just below the mixing part 30, on the inner peripheral surface of a pipe 1. And, by advancing the arm member 31 to the axial or longitudinal direction of the pipe 1, a lining layer A0 is produced over the whole part of the pipe 1.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for manufacturing inner-lined pipes in which a lining layer is formed on the inner surface of concrete pipes, clay pipes, iron pipes, etc., and more particularly, the present invention relates to a method for manufacturing inner-lined pipes in which a lining layer is formed on the inner surface of concrete pipes, clay pipes, iron pipes, etc. The present invention also relates to a method of manufacturing an inner lining tube with high production efficiency.

[Prior Art] As a method of forming a lining layer on the inner surface of a tube body for the purpose of improving acid resistance, alkali resistance, chemical resistance, etc., a method using centrifugal molding technology is disclosed in Japanese Patent Application Laid-open No. 76174/1983. known from the official gazette. FIG. 5 is a schematic explanatory diagram of the apparatus used in this method, in which a tube 1 for lining is placed on a rotating roller 2, and the rotating roller 2 is driven by a drive device (not shown). Several tens of grams (
It is configured to exert a centrifugal force greater than (g is the unit of gravity). Therefore, the lining material sprayed toward the inner circumferential surface of the tube from a discharge nozzle, which will be described later, hits the inner circumferential surface of the tube and is smoothed by the centrifugal force. The lining material supply device is
Rail 4 laid on the longitudinal extension line of the pipe axis of the pipe 1
and a truck 3 placed on it, and the tube 1 of the truck 3
On the side, there is an arm member 31 that can freely move forward and backward into the inside of the tube 1.
is attached, and a discharge nozzle 32 is disposed at the tip C of the arm member 31. The discharge nozzle 32 is connected to a hopper 34 on the truck 3 via a lining material supply pipe 33, and the lining material A, which has been mixed with a resin mortar and a hardening agent in advance, is transferred to the supply pipe by the air pressure of a compressor 35 or the like. 33 to the discharge nozzle 32. The lining material A is sprayed onto the inner circumferential surface of the tube 1 from the discharge nozzle 32, smoothed by the rotational centrifugal force of the tube 1, and then hardened to form a lining layer.

Therefore, by gradually advancing the arm member 31 to the inner side of the tube 1, a lining layer is formed on the inner circumferential surface of the tube over the entire length in the axial direction.

[Problems to be Solved by the Invention] However, since the resin mortar in the lining material is mixed with a curing agent long before the discharge, it must have a long pot life, and if this selection is incorrect, it may cause problems. , it hardens inside the supply pipe 33 and discharge nozzle 32, leading to a blockage accident. Even if a blockage accident does not occur, hardening begins,
Since the lining material A, which is losing flexibility, is supplied to the inner peripheral surface of the tube 1, in order to smooth it, the centrifugal force must be increased considerably, or another physical smoothing method (for example, a spatula) is applied. parts, etc.) must be used together. For this reason, production efficiency was low and materials were wasted.

Therefore, the present inventor has conducted extensive research to provide a method that can effectively utilize materials without wasting them, and can also efficiently manufacture inner lining pipes, and has completed the present invention.

[Means for Solving the Problems] The present invention, which has achieved the above object, feeds a resin mortar for lining and a hardening agent separately to the tip of an arm member in a supply device, and mixes the resin mortar and hardening agent. The gist of this method is to mix the lining material in the lining section and guide the mixed lining material to a discharge nozzle to form a lining layer.

[Function] In the present invention, the resin mortar and the hardening agent are separately fed to the tip side of the arm member of the supply device, and are mixed to form a lining material just before being discharged from the discharge nozzle. There is no risk that the lining material will harden inside the container, and therefore a hardener with a short pot life can be used. Therefore, the time required for the lining layer to harden after being discharged can be shortened, allowing efficient production.

In addition, with the above configuration, the lining material is supplied in a highly fluid state, so a smooth lining layer can be supplied even when the rotational centrifugal force is low. Nothing happens.

Furthermore, the lining material can be discharged from a discharge nozzle in the form of a droplet or a stream, thereby making it possible to prevent wasteful scattering of the material and deterioration of the environmental atmosphere.

[Example] FIG. 1 is a schematic explanatory diagram showing an example of a lining material supply device etc. used in the method of the present invention. The rotating structure of the tube 1 is similar to the conventional example shown in FIG. 5, and as shown in FIG.
is placed in the unrestrained state C. Further, the carriage 3 is configured to move on the rail 4 in the direction of arrow X r ''X 2 so that the arm member 31 can be inserted into/extracted from the hollow portion of the tube 1 .

As a special configuration for implementing the present invention, a mixing section 30 is provided at the tip of the arm member 31, and a discharge nozzle 32 for discharging the lining material is connected directly below the mixing section 30. A resin mortar supply pipe 33A and a hardening agent supply pipe 33B are connected to the mixing section 30, and each supply pipe 33A and 33B is connected to a resin mortar storage tank 34A and a hardening agent storage tank 34B through supply mechanisms 38 and 38, respectively. Connected.

FIG. 4 is a cross-sectional explanatory diagram showing an embodiment of the mixing section 30. The resin mortar supply pipe 33AG and the resin passage 30B
, the passage 308 is connected to the reservoir 302,
It is connected to a mixing passage 309 via an on-off valve 303. On the other hand, the curing agent supply pipe 33B is connected to a curing agent passage 314, and the curing agent passage 314 is connected to the mixing passage 309 via an on-off valve 312. A cleaning passage 311 and an on-off valve 315 are also installed on this section side, and the mixing passage 309 etc. can be cleaned with a solvent such as acetone after the lining material discharge operation is completed. (lower left part of Figure 4).

Resin mortar AI and hardening agent A2 by the mixing section 30
The mixing is carried out as follows. That is, the on-off valve 30
2 is opened by the pressure of the control fluid, and the resin mortar A
I is introduced into the mixing passage 309, and the on-off valve 312 is opened to introduce the curing agent A2 into the mixing passage 309 through the mixing passage 309, and the resin mortar A1 and the curing agent A2 are introduced into the mixing passage 309.
are mixed here and fed to the discharge nozzle 32 connected to the mixing passage 309.

Therefore, the resin mortar A1 and the hardening agent A2 fed from the storage tanks 34A and 34B are mixed in the mixing section 30 provided at the tip of the arm member 31, and are discharged from the discharge nozzle 32 provided directly below as shown in FIG. The liquid is discharged onto the inner circumferential surface of the tube 1 in the form of a liquid droplet or a flowing liquid. Then, the arm member 31 is connected to the tube 1.
A lining layer A as shown in FIG. 3 extends over the entire tube 1 in the axial longitudinal direction. form. The arm member 31 may complete the formation of the lining layer in one one-way or reciprocating stroke in the tube axis direction, or may form the lining layer by repeating a plurality of strokes. Further, the shape of the pipe 1 is not limited to one having an enlarged diameter socket as shown on the section side, but can be used as a straight pipe or a concrete pipe, a clay pipe, an iron pipe, etc. having a reduced diameter part.

As the resin mortar, a mixture of a thermosetting resin or a thermoplastic resin and an inorganic fine powder filler is used, and a curing accelerator or a wetting agent is mixed therein depending on the purpose. Further, as the curing agent, a liquid curing agent that is compatible with the above-mentioned resin is used. Examples of resin mortar include the following.

(Resin mortar) Unsaturated polyester resin: 100 parts by weight Curing accelerator Cobalt naphthenate = 0.5 parts by weight Silica powder with an average particle size of 50 μm or less: 200 parts by weight (curing agent) Methyl ethyl ketone peroxide: 1. Part of OIl [
[Effects of the Invention] Since the present invention is configured as described above, the curing time of the lining material can be set short, and the inner lining pipe can be manufactured efficiently. Since a flexible material can be discharged into the tube, a smooth lining layer can be formed without the need for large rotational centrifugal force.

Furthermore, since there is no need to store a large amount of lining material mixed with a hardening agent, there is no need to waste lining material.

Furthermore, the structure of claim (2) makes it possible to prevent the resin material from scattering.

[Brief explanation of drawings]

FIG. 1 is a schematic explanatory diagram showing an example of a lining material supply device used in the present invention, FIG. 2 is an explanatory diagram of the operating state of FIG. 1 as viewed from the If direction, and FIG. A partial sectional view, FIG. 4 is a sectional view showing an embodiment of the mixing part,
FIG. 5 is a schematic explanatory diagram showing an example of a conventional supply device.

Claims (1)

[Claims] (1) The arm member of the lining material supply device is moved back and forth in the longitudinal direction of the hollow tube that rotates around the tube axis, and the lining material is discharged from the discharge nozzle provided at the tip of the arm member to manufacture the inner lining tube. In the method of
A resin mortar for lining and a hardening agent are fed to a mixing section provided at the tip of the arm member via separate feeding routes, and the resin mortar and hardening agent are mixed in the mixing section. 1. A method for manufacturing an inner-lined pipe, comprising discharging the lining material from a discharge nozzle to form a lining layer. (2) The method for manufacturing an internally lined pipe according to claim (1), wherein the lining material is discharged from a discharge nozzle onto the inner circumferential surface of the pipe in a liquid form or in a flowing liquid form.