JPH06142409A - Deaerator for lining resin - Google Patents

Abstract

PURPOSE:To provide a deaerator where lining resin used in lining repairing method, particularly the one of high viscosity is easily and surely deaerated. CONSTITUTION:When the lining resin is used as a main agent, a main agent tank 1 is fixed in a body device 11 and a deaeratic cylinder 15 is fitted to it and the device 11 is evacuated by an evacuating device 35. The main agent is fed by a feeder 30 and cut and discharged from a discharge port 24 of a cutter 20, e.g. in the form of a thin skirt. At this time, bubbles of air contained in the main agent are sucked and removed to deaerate it. And after the deaerated main agent falls into the tank 1 as it is, its interstices, such as traces of the bubbles are filled up by a leveling knife 28 of a leveling device 25, causing the main agent to be settled and deposited in a dense state. Thus the tank 1 is to full capacity filled with the deaerated main agent. When the lining resin is used as a curing agent, similarly it is deaerated and filled into a curing agent tank 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mechanically removes air contained in a lining resin used in a lining repair method for existing pipes such as gas pipes and water pipes buried underground. The present invention relates to a defoaming device.

[0002]

2. Description of the Related Art When existing pipes such as gas pipes buried underground are used for a long period of time and are greatly damaged by corrosion, etc., the pipes will be rehabilitated in a buried state to prevent gas leakage. A lining repair method is known as a method for preventing this. This lining repair method mixes the epoxy resin main agent and the aromatic polyamine curing agent to make a lining resin, and transfers this lining resin through the inside of the repair tube by means of pig, air flow, vacuum suction force, etc. By attaching a resin to the inner surface of the pipe to form a resin film, a corroded portion or the like is repaired.

Here, in the construction method utilizing the air flow, 10,000 c
It is limited to a low-viscosity lining resin of around ps, so that the film thickness of the resin film becomes thin. In addition, in the method of using a pig, a lining resin having a viscosity of about 40,000 cps can be used, and the higher the viscosity, the greater the film thickness and the better the repair effect. Since the resins used in these construction methods are all soft liquids, air bubbles contained in the resins are also minute. Therefore, air bubbles contained in the resin do not cause much trouble.

On the other hand, as a method for forming a thick film thickness to improve the repair effect, a lining repair method utilizing air pressure has been proposed by the applicant of the present invention, for example, in Japanese Patent Laid-Open No. 63-55983. In this construction method, for example, 40
Using a very high viscosity lining resin of 10,000 cps,
The air pressure applied to this resin pushes the inside of the repair pipe in the shape of a plug. In this case, when the running speed of the resin is fast, the air pressure acting surface is in the shape of a bullet and the film thickness is thick, and when the running speed is slow, the air pressure acting surface is in the vertical shape and the film thickness is thick. Is thinly formed.

By the way, in this high-viscosity lining resin, the base material and the curing agent themselves are in the form of high-viscosity grease. For this reason, air bubbles may be included in a large shape in the manufacturing process thereof or when both are mixed and injected into the resin cassette immediately before lining. And if air bubbles are contained in the resin, the shape of the air pressure acting surface will be deformed from an appropriate shell or vertical state when lining by air pressure,
The resin film is disturbed or the film thickness becomes uneven. Further, the resin film itself, which is formed as a thick film, also causes problems such as deterioration in accuracy due to the inclusion of air bubbles. Therefore, it is desirable to perform a defoaming treatment so that air bubbles contained in the lining resin are removed as much as possible.

Conventionally, the defoaming of the above-mentioned high-viscosity lining resin has hardly been performed at present. Further, for example, when defoaming the main agent by force, it is conceivable to stroke the surface of the main agent with a brush to remove air bubbles by suction while putting the main agent little by little inside the tank.

[0007]

However, in the above-mentioned prior art, it is necessary to put the main agent into the tank little by little, and stroke it with a brush and then remove it by suction. It is bad and requires a lot of time and labor, and it is difficult to sufficiently perform defoaming.

The present invention has been made in view of this point, and provides a defoaming device capable of easily and reliably defoaming a particularly high-viscosity lining resin used in a lining repairing method. With the goal.

[0009]

In order to achieve the above object, the present invention provides a tank fixing base for fixedly supporting a tank filled with a main agent or a curing agent with its outlet closed and airtight on the opening side of the tank. A main body device having a defoaming cylinder connected thereto, a supply device connected to the defoaming cylinder to intermittently supply a predetermined amount of a main agent or a curing agent, and connected to the defoaming cylinder to always maintain a predetermined negative pressure state. It has a vacuum suction device that keeps it, and a discharge device that is provided inside the defoaming cylinder so as to communicate with the supply device, and a cutting device that finely cuts and discharges the main agent or curing agent. A leveling device that has a leveling spatula that can be provided and that leveles so as to fill the gap between the defoamed main agent or curing agent.

[0010]

According to the above construction, in the case of, for example, the main agent of the lining resin, the tank is fixed to the main body device, the defoaming cylinder is attached, the vacuum suction device is set to the negative pressure state, and the main agent is supplied by the supply device to disconnect the resin. For example, the main agent is cut into a thin skirt and discharged from the discharge port of the device, and at this time, the air bubbles contained in the main agent are easily exposed, so that the air is effectively sucked and removed to be defoamed. . After the main agent degassed in this way falls into the tank as it is, the gaps such as the traces of air bubbles in the air are filled by the leveling spatula of the leveling device, so that the main agent becomes a dense state and is deposited and deposited. The main agent defoamed in this way is filled in the tank.

In the case of a curing agent, the defoaming is performed in the same manner, and the defoamed curing agent is filled in the tank. Then, by mixing the defoamed main agent and the curing agent at a predetermined ratio, a lining resin with very few air bubbles can be reliably produced. So this lining resin
For example, a resin film having a uniform film thickness can be accurately formed by using a lining repairing method utilizing air pressure.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. First, the outline of defoaming of the lining resin will be described. In the high-viscosity lining resin used in the lining repair method utilizing air pressure, the main agent is, for example, a light white grease-like epoxy resin, and the curing agent is, for example, a dark green grease-like aromatic polyamine, and these main agents The hardener is mixed in a weight ratio of 100: 50.
Therefore, the curing agent is filled in a small dedicated tank, and the main agent is filled in a dedicated tank that is twice the size. By connecting both tanks to a mixer and mixing, a lining resin is made and injected into the resin cassette. It is supposed to do. Therefore, it is configured to perform defoaming treatment when the main agent and the curing agent are respectively filled in dedicated tanks.

An example of defoaming the main agent will be described with reference to FIG. Reference numeral 1 is a main agent tank, to which the main body device 11 of the defoaming device 10 is attached,
A main agent supply device 30 and a vacuum suction device 35 communicate with the main body device 11. The main agent tank 1 has a bottomed tubular shape, has an outlet 2 at the bottom, and is formed so as to have a flange 3 at the top and open. And this main agent tank 1
The spacer 4 is inserted into the outflow port 2 so as to be flush with the bottom and sealed with the airtight stopper 5.

The main body device 11 has a tank fixing base 12 for supporting the main agent tank 1, and a defoaming cylinder 15 mounted on the main agent tank 1. The defoaming cylinder 15 has a cutting device 20 and a leveling device 25. Is provided. The tank fixing base 12 is the base body 1
3, the support cylinder 14 having the stepped portion 14a is erected on the upper surface of the support cylinder 14, and the main agent tank 1 is provided above the stepped portion 14a of the support cylinder 14.
Are fitted and fixed in a detachable manner. The defoaming cylinder 15 has a flange 16 at the bottom and an opening, and a lid 17 at the top, and is formed to have the same diameter as the main agent tank 1 and a predetermined length. Then, the defoaming cylinder 15 is joined to the main agent tank 1 by joining the flanges 3 and 16 together, and airtightly connected with the bolts 18 for continuous connection.

The cutting device 20, as shown in FIG.
It has a T-shaped communication pipe 21 fixed to the center of the inside and outside of the defoaming cylinder 15, and a large-diameter cylindrical body 22 is screwed to the lower end of this communication pipe 21. The cylindrical body 22 has a plurality of holes 22a radially provided on a bottom portion 22b. Further, a circular plate 23 is fixed below the cylindrical body 22 so as to be closely opposed to each other by a mounting member 23a, and a radial discharge port 24 having a slight gap of 1 to 2 mm is formed between them. The discharge port 24 is configured to cut and discharge the grease-based main agent A into a thin skirt shape.

In the leveling device 25, a threaded rod 27 having a handle 26 is screwed into the upper threaded portion 21a of the communication pipe 21, and penetrates the communication pipe 21, the cylinder 22 and the disc 23 and extends downward. It Then, a leveling spatula 28 having substantially the same length as the inner diameter of the main agent tank 1 is horizontally attached to the lower end of the screw rod 27, and the leveling spatula 28 is operated from the vicinity of the bottom of the main agent tank 1 by a handle operation. It is configured such that the range retreated to (1) can be moved up and down to uniformly level the entire area of the main agent A in the radial direction in the tank 1.

The main agent supply device 30 is a tank 31 for producing the main agent A, and a mono pump 33 driven by a motor 32.
This pump 33 is connected to the communication pipe 21 by a pipe 34 so as to intermittently supply a predetermined amount of the main agent. In the vacuum suction device 35, the defoaming cylinder 15 is connected to a vacuum pump 37 by a pipe 36, a vacuum gauge 38 is provided in the defoaming cylinder 15, and the inside of the main agent tank 1 and the defoaming cylinder 15 are in a predetermined negative pressure state. Configured to keep on.

Next, the operation of this embodiment will be described with reference to FIGS. 3 and 4. First, the empty base agent tank 1 is replaced with the defoaming device 10
The main body device 11 is fixed to the tank fixing base 12, and the defoaming cylinder 15 is connected onto the main agent tank 1 to complete the preparation. Therefore, during the defoaming process, the vacuum pump 37 is driven to keep the inside of the main agent tank 1 and the defoaming cylinder 15 in a negative pressure state of, for example, -1.0 atm, and the leveling spatula 28 is lowered to use the main agent. It is located below the tank 1. When the mohno pump 33 of the main agent supply device 30 is driven in this state, the grease-like main agent A is pressure-fed to the communication pipe 21, and since the main agent A has a high-viscosity grease shape, the communication tube as shown in FIG. 21
From the discharge port 24 formed by the cylindrical body 22 and the circular plate 23 at the lower end of the, the powder is sequentially extruded while being cut into a thin skirt.

Then, the main agent A in this case is thin and rough on both sides as shown in FIG. 4 (a), and the air bubbles D contained in the main agent A are very easily exposed.
This air is immediately sucked and removed as shown by the broken line. Thus, when the main agent A is discharged from the discharge port 24 in a thin skirt shape, the air bubbles D contained in the main agent A are efficiently removed and defoamed over the entire area, and the defoamed main agent A sequentially drops. Accumulated inside the main agent tank 1.

As shown in FIG. 3 (b), when a predetermined amount of the defoamed main agent A is accumulated, the supply of the main agent A is temporarily stopped and the handle 26 of the leveling device 25 is operated to level the spatula. Two
Ascend while rotating 8. Then, as shown in FIG. 4B, the main agent A, which is laminated in a state in which there are many gaps E such as bubbles of air bubbles, is leveled by the leveling spatula 28 so as to fill the gap E, whereby the main agent is As shown in FIG. 4 (c), A is immediately deposited in a uniform and dense state throughout the interior of the main agent tank 1 by sedimentation. At this time, the original color and viscosity of the main agent A are restored. In this case, the negative pressure is 76
When it is controlled to 450 mmHg by slightly reducing it from 0 mmHg, the weight of the main agent A is further accelerated by its own weight.

By repeating the above operation several times while raising the spatula 28 and raising it, the main agent A is efficiently degassed in a predetermined amount in the tank 1 and successively deposited. And Figure 3
As shown in (c), the inside of the main agent tank 1 is fully filled with the defoamed high-viscosity main agent A, and at this time, the leveling spatula 28 retreats toward the defoaming cylinder 15 and separates. It will be possible. Therefore, the main agent tank 1 is removed from the main body device 11, and the operation is completed.

An example of defoaming the curing agent will be described with reference to FIG. In this case, the curing agent tank 6
However, the length is the same as that of the main agent tank 1, and the capacity is formed to be approximately half. Therefore, the support cylinder 14, the defoaming cylinder 15, and the leveling spatula 28 of the tank fixing base 12 are formed to have a small diameter according to the shape of the curing agent tank 6. Other than that, the configuration is exactly the same, and the same portions are denoted by the same reference numerals and the description thereof is omitted.

Therefore, also in this embodiment, the hardening agent tank 6 is fixed to the tank fixing base 12, and the defoaming cylinder 15 is mounted on the tank 6. And grease-like curing agent B
The air bubbles D contained in the curing agent B are extruded from the discharge port 24 while being cut into a thin skirt and vacuum-sucked.
Is degassed so as to remove, and the curing agent tank 6 is fully filled and filled.

Referring to FIG. 6, an embodiment in the case where a lining resin is produced by mechanically mixing a main agent and a curing agent will be described. Reference numeral 40 denotes an extruder, which is a main agent tank 1 in which the main body A that has been defoamed is filled in the apparatus main body 41,
Similarly, the curing agent tank 6 filled with the defoaming curing agent B is installed vertically at the same height. Further, a screw jack 42 is connected to a motor 44 via a speed reducer 43 and vertically stands upright on the apparatus main body 41.
The pressing member 45 is screwed to the 2 so as to be able to move up and down. Pressing member 45
Is guided by the oiles metal 46 and the guide 47 so as to move up and down in a balanced state even when the left and right loads are different. On the other hand, above both tanks 1 and 6, the piston 4
A rod 49 having 8 is arranged, and this rod 49 is connected to the pressing member 45 via a swing mechanism 50 to facilitate the attachment / detachment of the tank.

The outlets 2 of both tanks 1 and 6 are allowed to flow out by removing the spacers and airtight plugs, and the outlets 2 are connected to the pipes 51 when mounted on the apparatus main body 41.
These pipes 51 are connected to a mixer 52 that mixes resin, and the discharge side of the mixer 52 is connected to a resin cassette 53.

Next, the operation of this embodiment will be described. A degassed main agent tank 1 and a curing agent tank 6 are set in an apparatus body 41 of an extrusion apparatus 40, and they are coaxial with both tanks 1 and 6. Position and lock the rod 49 of the piston 48. After that, when the motor 44 is driven, the speed reducer 4
The screw jack 42 is rotated by 3 and the piston 48 descends inside the tanks 1 and 6 via the pressing member 45 in accordance therewith, whereby the main agent A and the curing agent B are always in a ratio of 100: 50. It is extruded and flows into the mixer 52. In the mixer 52, the main agent A and the curing agent B, which have been subjected to the same defoaming treatment, are mixed to each other, so that the lining resin C that is defoamed and has a very small amount of air bubbles is surely increased in affinity and the like due to defoaming. Will be made in. The defoamed high-viscosity lining resin C is discharged from the mixer 52 and immediately filled in the resin cassette 53.

Referring to FIG. 7, an embodiment in which a lining repairing method utilizing air pressure is carried out using the resin cassette 53 will be described. First, in the repair pipe 60 of an existing pipe such as a gas pipe buried in the soil, only both ends thereof are opened by excavation holes. A resin cassette 53 is attached to one end of the repair pipe 60 via a launcher 61, and the resin cassette 53 is connected to the hose 62 and the control device 6.
3 is connected to the compressor 64. The other end of the repair pipe 60 is connected to the resin receiver 67 via the receiver 65.

Therefore, at the time of lining, the compressor 64 is driven so that the controller 63 adjusts the air pressure to a predetermined lining speed and acts on the resin cassette 53, whereby the defoamed high viscosity inside the resin cassette 53 is applied. The lining resin C is injected into the repair pipe 60. Then, the resin C of the repair pipe 60 is pressed and moved by the air pressure F while attaching the resin to the inner surface of the pipe in a plug shape.
In this way, the lining is performed so as to form the resin film G on the inner surface of the tube. At this time, when the air pressure F is low, the air pressure acting surface H of the resin C becomes vertical as shown in the drawing, and the diameter of the air passage increases, so that the film thickness of the resin film G becomes relatively thin.

On the other hand, in this lining, the lining resin C is defoamed so that air bubbles are very small. Therefore, no matter where the air pressure F acts on the resin C, the internal air It no longer interferes with the bubbles.
Therefore, the vertical air pressure acting surface H of the resin C is prevented from being disturbed, whereby the resin film G has an accurate film thickness corresponding to the air pressure F and has a uniform film thickness. Also, the resin film G itself has less air bubbles and is improved in quality.

Although the embodiments of the present invention have been described above, the resin may be cut into a thin linear shape or the like at the time of cutting with the defoaming device.

[0031]

As described above, according to the present invention, since the lining resin used in the lining repairing method is configured to efficiently and mechanically degas, the air contained in the lining resin having a particularly high viscosity is used. The bubbles can be removed quickly and reliably. Therefore, when the resin film is formed by applying the lining repair method using air pressure, the film thickness of the resin film can be made appropriate and uniform, the quality of the resin film is improved, and the lining performance is improved. It will be possible to improve significantly.

Since the base resin and the curing agent which are the base of the lining resin are defoamed, the lining resin can be produced by mixing the two as in the conventional case, and the defoaming performance of the lining resin is also improved. Further, it is possible to manufacture and store a large amount of degassed tanks of the main agent and the curing agent in advance.

Since the defoaming device is constructed so as to vacuum-suck the main agent or the curing agent into finely cut and discharged inside the defoaming cylinder which is airtightly attached to the tank, it is included in the inside of the main agent and the like. The air bubbles generated can be removed uniformly with high accuracy. Further, since the leveling device is configured to fill the gaps of the defoamed main agent and the like in the tank, the defoamed main agent and the like can be filled and filled in the tank.

[Brief description of drawings]

FIG. 1 is a configuration view showing a partial cross-section of an embodiment in which a main component is defoamed as a defoaming device for a lining resin according to the present invention.

FIG. 2 is an enlarged sectional view of a cutting device and a leveling device.

FIG. 3 is a diagram showing an operating state of a defoaming device.

FIG. 4 is a view showing a defoamed state of a main agent.

FIG. 5 is a configuration diagram showing a partial cross-section of an example in the case of defoaming a curing agent.

FIG. 6 is a configuration diagram showing an example in the case where a lining resin is made with a main agent and a curing agent.

FIG. 7 is a configuration diagram showing a state in which a lining repairing method using air pressure is applied.

[Explanation of symbols]

 1 Tank for Main Agent 6 Tank for Curing Agent 10 Defoaming Device 11 Main Unit 12 Tank Fixing Stand 15 Defoaming Tube 20 Cutting Device 24 Discharge Port 25 Leveling Device 28 Leveling Spatula 30 Base Material Supply Device 35 Vacuum Suction Device

Claims (3)

[Claims] 1. A tank fixing base for fixedly supporting a tank filled with a main agent or a curing agent with its outlet closed and a main body unit having a defoaming cylinder airtightly connected to the opening side of the tank, and a defoaming cylinder. And a supply device for intermittently supplying a predetermined amount of the main agent or the curing agent by a predetermined amount, a vacuum suction device connected to the defoaming cylinder for keeping a predetermined negative pressure state at all times, and a supplying device inside the defoaming cylinder. Defoamed with a cutting device that has a discharge port provided in communication and that cuts and discharges the main agent or curing agent into small pieces and a leveling spatula that is movably provided inside the tank and the defoaming cylinder. A defoaming device for a lining resin, comprising a leveling device for leveling so as to fill the gap between the main agent and the curing agent. 2. The tank filled with the defoamed main agent and the curing agent is mounted on a mechanical extrusion device, and the outlets of both tanks mix the main agent and the curing agent at a predetermined ratio to form a lining resin. The defoaming device for lining resin according to claim 1, which is connected to a mixer for making and a resin cassette for filling the lining resin. 3. The defoaming device for a lining resin according to claim 1, wherein the main agent and the curing agent are in the form of high-viscosity grease used in a lining repairing method utilizing air pressure.