JP4728731B2 - Supply method of two-component curable material - Google Patents

Description

  The present invention relates to a method and apparatus for supplying a two-component curable material, and in particular, two components that are cured in a short time by mixing a material composed of two components of liquid A and liquid B such as a main material and a cured material. The present invention relates to a curable material supply method and apparatus.

  In recent years, in high-speed railways, standardized track slabs equivalent to concrete sleepers that stop rails on roadbed concrete that has been submerged with concrete to eliminate the effects of earthquakes, snow damage, water damage, etc. to ensure safety A slab track with a rail mounted on it is used. In this slab type track, after adjusting the track slab to be correctly positioned in the vertical and horizontal directions on the roadbed concrete, an emulsion composed of cement, asphalt, etc. is injected and fixed in the gap between the track slab and the roadbed concrete. It is like that.

  Such a slab type track is also damaged by peeling, cracking, etc. due to a load applied by a train passing over a long period of time, a change in temperature, or an excess of the rail tightening force. As a result, the rail may float or change its position. In addition, the ground will deteriorate due to aging. In such a case, the repair can only be performed for about 3 to 5 hours at night when the railway is stopped so as not to disturb the operation of the train during the day. And in such a short time, it is necessary to peel off the track slab from the roadbed concrete, readjust the position, and inject and fix the hardening chemical again. Furthermore, if the ground changes due to an earthquake or the like, many places must be inspected and repaired in a very short time. This is because the railway is an artery of the national economy and its stagnation is not allowed.

  As such a repair method, for example, a method disclosed in JP-A-11-256504 has been proposed. In this method, after a deteriorated portion is scraped off, a repair material obtained by adding a rubber chip or the like as a binder to a two-component urethane resin is filled and cured. However, since this repair method requires a lot of work time, it has been necessary to limit the number of passing trains or reduce the work part. This is because it takes at least 24 hours to cut off the deteriorated portion, fill the repair material, and cure.

  For this reason, Japanese Patent Application Laid-Open No. 2002-129503 proposes a repair method that can be applied in a short time. In this method, a two-component curable material that cures in a very short time is used, and after the two components are mixed, the two-component curable material is immediately filled in a gap such as a crack and solidified.

Japanese Patent Laid-Open No. 11-256504 JP 2002-129503 A

  However, as is apparent from FIG. 3 and paragraph number “0014”, the repair method disclosed in Patent Document 2 is a curing material (two-component room temperature curable radical polymerizable resin) composed of two liquids, liquid A and liquid B. Are separately pumped, mixed and cured immediately before injection. That is, liquid A and liquid B must be separately sent to the mixer by two high-pressure hoses using two pumps. Moreover, it was necessary to use a high-pressure-resistant mixer. For this reason, there is a problem that the entire apparatus is enlarged. In the repair work that is carried out while checking the repair location over a long distance like a railway facility, if the equipment to be used is large, it requires a lot of labor to transport it, especially on the viaduct, in the tunnel, in a cold district In other words, the large size of the device has been a drawback in work.

Therefore, the present invention has been made in consideration of such problems, and in order to make it possible to complete the repair work in a short time, a curing material composed of two liquids of liquid A and liquid B is efficiently used. It is an object of the present invention to provide a method for supplying a two-component curable material that can be supplied in an automated manner.
In addition, a two-component curable material that can be used by moving the device for supplying a curing material composed of two liquids of liquid A and liquid B to a smaller size than before and can be easily moved even in narrow places such as on high bridges and in tunnels. An object of the present invention is to provide a supply device.

In order to solve the above-mentioned problem, the present invention according to claim 1 is a method for supplying a two-component curable material that is cured by mixing two types of materials, the two-component being filled in separate containers. The liquid A and liquid B constituting the curable material are introduced into the chamber room having a predetermined volume by approximately the same amount, and held for 30 to 300 seconds in the chamber room so that the liquid A and liquid B are not mixed. A gel-like film is formed on the contact surface by contact, and pumped to the discharge means by one hose while keeping this state, and immediately before or when discharging from the discharge means A The liquid and the B liquid are mixed by a mixing means and cured.

Instead of pumping the two liquids A and B with separate hoses using separate pumps as in the prior art, the two liquids are pumped with a single pump and a single hose. The principle is that liquid A and liquid B constituting the two-component curable material filled in separate containers are respectively introduced into the chamber room for approximately 30 to 300 seconds without mixing and mixing almost the same volume. Touch the surface. A thin gel-like film in a film state is generated on the contact surface. This film does not have a high molecular weight, and the viscosity of the film-like liquid is maintained at about 200,000 CP or less for about 5 to 10 minutes after the film is formed. In this state, when pumping with a single liquid pump, pumping of about 20 to 30 m is possible at a pressure of 20 MPa. Moreover, there is almost no turbulence in the hose and the two liquids are not mixed. Accordingly, the two liquids can be pumped without being mixed in one hose. Then, by setting a control valve equipped with a mixer at the tip of the hose, the two liquids are mixed with the mixer just before the injection and injected into the repaired part while starting curing.
Also, the contact surfaces of the two liquids have the property that the same amounts of the liquids A and B are taken in, and there is no need to pump them with a quantitative device, and they are introduced into the chamber room with an error of ± 5%. As a result, pumping with one pump and one hose became possible.

  In order to solve the above-mentioned problem, the present invention described in claim 2 is the method for supplying a two-component curable material according to claim 1, wherein the specific gravity difference between the liquid A and the liquid B is 0.2 or less. Features.

  In order to solve the above problems, the present invention described in claim 3 is the method for supplying a two-component curable material according to claim 1 or 2, wherein the initial viscosity of the liquid A and the liquid B is 1,000 to 3 respectively. , 000 CP, which is characterized by almost the same tendency with respect to temperature change.

In order to solve the above-mentioned problem, the present invention according to claim 4 is the method of supplying a two-component curable material according to any one of claims 1 to 3 , wherein the viscosity after contact between the liquid A and the liquid B is as follows. Is less than 300,000 CP.

According to the supply method of the two-component curable material according to the present invention, the operation is simpler than the conventional repair method and the apparatus therefor, and there is an effect that the operations such as setting, disassembling and cleaning of the apparatus can be reduced. .
In addition, according to the method for supplying a two-component curable material according to the present invention, there is an effect that repair work can be performed in a short time, and work skill is unnecessary.
Furthermore, according to the two-component curable material supply apparatus of the present invention, since it is small in size, it can work in parallel several units at a time, and can be adapted to repair work in a short time.

Hereinafter, a method for supplying a two-component curable material according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic cross-sectional view schematically showing an embodiment of a two-part curable material supply apparatus, FIG. 2 is a partial sectional side view of the two-part curable material supply apparatus 1, and FIG. It is a top view of the supply apparatus of the two-component curable material shown in FIG.

  The two-component curable material supply apparatus 1 shown in FIG. 1 is schematically configured to open and close simultaneously with tanks 10a and 10b that respectively store and store liquid A and liquid B constituting the two-component curable material. Simultaneous opening and closing valve 12 for supplying the same amount of liquid, chamber room 15 for forming a film by contacting liquid A and liquid B, high-pressure pump 20 for pumping liquid A and liquid B, liquid A and liquid B A high pressure hose 30 for feeding the liquid, a high pressure injection valve 36 for discharging and injecting the A liquid and the B liquid, and a mixer 37 for mixing the A liquid and the B liquid are provided.

The tanks 10a and 10b have a capacity of about 2,000 to 3,000 cc, are made of synthetic resin, and have openings 11a and 11b on the lower side. Then, by opening and closing a simultaneous opening / closing valve 12 which will be described later, the supply of the A liquid and the B liquid in the tanks 10a and 10b can be stopped in the chamber room 15, respectively. The tanks 10a and 10b are preferably formed of a transparent or translucent material so that the contents can be monitored from the outside. As a result, the replenishment timing of the liquid A and the liquid B can be known, and the working efficiency is improved. However, it should not be limited to such a configuration, and can of course be formed of a metal material such as stainless steel.
The tanks 10a and 10b are provided with a supply port (not shown) on the upper side thereof. When the liquids A and B constituting the two-component curable material are reduced, the liquids A and B are replenished from the supply ports. It can be done. The replenishment of the liquid A and the liquid B is not limited to this, and the tanks 10a and 10b may be removed and filled from the openings 11a and 11b.

  A simultaneous opening / closing valve 12 is provided below the tanks 10a and 10b. The simultaneous opening / closing valve 12 communicates with a communication hole 12a that communicates the opening 11a provided in the lower part of the tank 10a and the chamber room 15 and a communication hole 12a that communicates between the opening 11b provided in the lower part of the tank 10b and the chamber room 15. The tank 10a, 10b and the chamber room 15 can be simultaneously communicated with each other or can be closed by operating the lever 13. The simultaneous opening / closing valve 12 shown in the figure has a cylindrical valve body with communication holes 12a and 12b, respectively. By rotating the valve body with a lever 13, the opening 11a, the chamber room 15, the opening 11b, and the chamber The room 15 is in communication.

  The chamber room 15 is a space for bringing the liquid A and the liquid B supplied at substantially the same amount through the communication holes 12a and 12b at the same time into contact with each other and forming a gel-like film on the contact surface. That is, as shown in FIGS. 4A to 4C, the liquid A and the liquid B introduced into the chamber room 15 react only at the contact surface, and a gel-like film is formed on the contact surface. . The volume of the chamber room 15 differs depending on the function of the pump, but it needs a capacity that can be held for about 30 to 300 seconds. This is because a gel-like film is formed on the contact surface between the liquid A and the liquid B during this time, and the pressure is fed by the high-pressure pump 20 while maintaining the state. To elaborate on this point, a predetermined amount of two liquids are quantitatively sent out by the high-pressure pump 20, but at least kept in the chamber room 15 for about 30 to 300 seconds and then supplied into the cylinder portion 24. That is, the chamber room 15 is provided. Note that a suction port 24a is formed on the lower side of the chamber room 15 for feeding the liquid A and liquid B partitioned by a film into the cylinder portion 24 of the high-pressure pump 20 while maintaining the state.

  By the way, when the A liquid and the B liquid are pumped by the high-pressure pump 20 with a gel-like film formed on the contact surface, the A liquid and the B liquid are taken into the chamber room 15 from the tanks 10a and 10b, respectively. At this time, the A liquid and the B liquid are taken in the same amount each other, and this has a quantitative property, and the A liquid and the B liquid are supplied into the chamber room 15 within an error range of ± 5% or less. . In addition, the supply of the A liquid and the B liquid into the chamber room 15 can be performed by natural falling without requiring a special device. Since this is integrated through a gel-like film formed on the contact surface between the liquid A and liquid B, the liquid A and liquid B are respectively supplied from the tanks 10a and 10b to the chamber room by the amount sent by the high-pressure pump 20. This is considered to be due to the action of pulling in 15.

Thus, in order to pump the A liquid and the B liquid partitioned by the gel-like film with the high pressure pump 20 while maintaining the state, the following conditions are necessary for the A liquid and the B liquid.
1. The specific gravity of liquid A and liquid B is very close (0.2 or less)
2. The difference in viscosity is close to each of the two liquids and has the same tendency with respect to temperature changes.
(The initial viscosity is preferably 1,000 to 3,000 CP.)
3. The reaction time until solidification is short, about 10 minutes.
4). The maximum viscosity when the two liquids are brought into contact with each other to increase the viscosity is 300,000 CP or less.

  Since the two-component curable material as described above has been developed with an acrylic adhesive, it can be injected with one pump and one hose as in the two-component curable material supply device according to the present invention. became. Of course, two-component curable materials such as adhesives, water-stopping agents, waterproofing agents, etc. can be manufactured with other materials, for example, resins such as epoxy, oher, acrylic, etc., and meet the above conditions. If it is, it does not ask the material.

  As the two-component curable material used in the present invention, the resin is divided into two components, one of which is a main agent (for example, “liquid A”) and the other is a curing agent (for example, “liquid B”). There is a type of polymerizable resin that cures by radical polymerization at room temperature by mixing. Such a two-component curable material is, for example, (meth) acrylic resin, which has fast curing, wet surface adhesion, easy workability, easy injection, high durability, and the like.

A high-pressure pump 20 shown in FIG. 1 is a diaphragm pump. By introducing high-pressure air sent from an air supply device (not shown) into the air chambers 22a and 22b, the spool 21 is moved in the horizontal direction in FIG. By reciprocating, the A liquid and B liquid introduced into the cylinder portion 24 by the reciprocating movement of the shaft 23 attached to the spool 21 are pumped. The chamber room 15 is disposed immediately before the suction port 24a of the high-pressure pump 20. When the shaft 23 is positioned at the leftmost side in FIG. The liquid A and the liquid B are sent out when the shaft 23 is pulled into the cylinder portion 24 and the shaft 23 reaches the rightmost side.
A check valve 25 is disposed in the discharge portion 26 of the high-pressure pump 20.

A joint 27 is attached to the discharge portion 26 of the high-pressure pump 20, and a high-pressure hose 30 is attached via the joint 27.
A high-pressure injection valve 36 is disposed at the tip of the high-pressure hose 30 via a swivel joint 35, and the liquid A and the liquid B are conveyed to the high-pressure injection valve 36 at the same time with no separation between the membranes. The swivel joint 35 is appropriately rotated when the high pressure injection valve 36 is routed to prevent the high pressure hose 30 from being twisted.

  The high-pressure injection valve 36 is provided with a static mixer 40 that is a mixing means for mixing the A liquid and the B liquid. As shown in FIG. 5, the static mixer 40 has a shape in which spiral guide portions that rotate 180 ° are shifted and laminated every 90 °, and the liquid A and the liquid B pass through the static mixer 40. In this case, mixing is performed for the first time and curing is started. Thus, since mixing is performed when the two liquids are discharged, even a two-liquid curable material whose curing starts in a very short time after mixing can be used for repair work without any problem. Therefore, it is not necessary to delay the curing time of the two-component curable material as conventionally.

  Further, the high pressure injection valve 36 is provided with a hand lever 36a. When the hand lever 36a is grasped, the liquid A and the liquid B are discharged through the static mixer 40, and when the hand lever 36a is released, the discharge is stopped. It has become so.

  The two-component curable material supply device 1 further includes an air pressure adjuster 28, an air supply port 28a, and a pressure gauge 28b for adjusting the pressure of air supplied from an air supply device (not shown). Thereby, a certain force of air supplied to the high-pressure pump 20 can be adjusted.

  The operation of the two-component curable material supply apparatus 1 described above will be described together with the two-component curable material supply method according to the present invention. FIG. 6 is a flowchart of an embodiment of a method for supplying a two-component curable material according to the present invention.

  First, after confirming that the simultaneous opening and closing valve 12 is closed, the liquid A and the liquid B are filled into the tanks 10a and 10b in the same amount. The lever 13 of the simultaneous opening / closing valve 12 is operated to fully open the simultaneous opening / closing valve 12, and the liquid A and liquid B are introduced into the chamber room 15 (step S1). A liquid and B liquid contact on the surface, and form a film-like film | membrane (step S2). In the chamber room 15, the film is formed for about 30 to 300 seconds. The two liquids do not mix within the waiting time in the chamber room 15, but react at the contact surface and develop into a high-viscosity (about 2 to 100,000 CP) solution sandwiching one gelled film. The reaction rate of the two liquids reaching 20 to 100,000 CP is slow and does not solidify even when left for 5 to 10 minutes. Further, even if the high pressure hose 30 conveys nearly 30 m, no turbulent flow is generated in the high pressure hose 30 and the injection is not affected at all.

  When the high-pressure pump 20 is operated, the A liquid and B liquid that form a film in the chamber room 15 are sucked into the cylinder portion 24 by the same amount, and the sucked two liquids reach a viscosity of about 2 to 300,000 cp. One high pressure hose 30 is sent to the high pressure injection valve 36 (step S3). When the high-pressure injection valve 36 is opened, the two liquids are completely mixed by the static mixer 40 (step S4), and the two-part curable material discharged and injected into the repaired site reacts and hardens within a specified time (step S5). ). After the two liquids pass through the static mixer 40, the curing proceeds in about 5 minutes and completes in about 10 to 20 minutes. In addition, it is necessary to always monitor the curing in the static mixer 40 and take care not to affect the ejection.

By the way, in order to explain the supply method of the two-component curable material according to the present invention, the slab repair of the railway has been described as an example. However, the method and apparatus of the present invention are not limited to this, and general houses, buildings It can be used in a wide range of fields such as maintenance, waterproofing and water stoppage.

It is the schematic sectional drawing which showed typically one Embodiment of the supply apparatus of a two- component curable material. It is a partial cross section side view of the supply apparatus of a two-component curable material. It is a top view of the supply apparatus of the two-component curable material shown in FIG. (A)-(c) is explanatory drawing for demonstrating formation of a film | membrane. It is a perspective view of a static mixer. It is a flowchart which shows one Embodiment of the supply method of the two-component curable material which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Two-component curable material supply apparatus 10a Tank 10b Tank 11a Opening part 11b Opening part 12a Communication hole 12b Communication hole 13 Lever 15 Chamber room 20 High pressure pump 21 Spool 22a Air chamber 22b Air chamber 23 Shaft 24 Cylinder part 24a Suction port 25 Check valve 26 Discharge part 27 Joint 28 Air pressure regulator 30 High pressure hose 35 Swivel joint 36 High pressure injection valve 36a Hand lever 37 Mixer 40 Static mixer

Claims (4)

A method for supplying a two-part curable material that is cured by mixing two kinds of materials,
Liquid A and liquid B constituting the two-component curable material filled in separate containers are introduced into the chamber room having a predetermined volume by approximately the same amount, and the liquid A and liquid B are mixed in the chamber room. The gel-like film is formed on the contact surface by holding it for 30 to 300 seconds so that it does not occur, and the pump is pumped to the discharge means with one hose while maintaining this state. A method of supplying a two-part curable material, wherein the liquid A and the liquid B are mixed by a mixing means and cured immediately before or when being discharged from the discharge means. In the supply method of the two-component curable material according to claim 1,
The method for supplying a two-component curable material, wherein the specific gravity difference between the liquid A and the liquid B is 0.2 or less. In the supply method of the two-component curable material according to claim 1 or 2,
The method for supplying a two-component curable material, wherein the initial viscosities of the liquid A and the liquid B are 1,000 to 3,000 CP, respectively, and tend to be almost the same with respect to temperature changes. In the supply method of the two-component curable material of any one of Claims 1-3 ,
A method for supplying a two-component curable material, wherein the viscosity of the liquid A and the liquid B after contact is 300,000 CP or less.

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