JPH0449327Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a concrete structure repair device that repairs cracks generated on the surface of the concrete structure by injecting a chemical solution.

(Prior Art) As is well known, thin cracks occur on the surface of concrete buildings and structures over a long period of time.

If these cracks are left untreated, they will gradually expand, causing parts of the concrete to peel off and weaken, so chemicals such as adhesives and hardening agents must be injected into the cracks.

In order to inject the chemical solution into the above-mentioned crack, the substrates d with the cylindrical portions c standing upright are attached to the surface of the wall b of the concrete structure where the crack a has occurred at appropriate intervals along the crack a, and the substrates d , d is closed with a sealing material e, and a chemical injection device is attached to the cylindrical portion c, and this injection device pumps the chemical liquid from the cylindrical portion c into the crack a. In this case, even if the chemical solution is injected at high pressure and in a short time, it will not fill the microscopic voids in the crack, so it must be injected at low pressure and over a long period of time.

Conventional injection devices have a rubber bag, which is inflated by supplying a drug solution, and the outlet of the bag is inserted into the cylinder c.
The medical solution inside is gradually injected into the crack a from the cylindrical part c by using the contractile force of the bag. Then, when the bag no longer contracts, it is assumed that the chemical solution has been injected, and the substrate d is removed from the wall surface b, the chemical solution is cured, and then the sealing material e is peeled off and the opening of the crack is filled with mortar or the like. There is.

In addition, a concrete crack repair device has been proposed in which a pressure accumulating and liquid agent tank is provided, the air pressure in the tank is increased by pressurizing the liquid into the tank, and the liquid is pressurized and filled by the action of this compressed air. (Utility Model Application Publication No. 59-186350).

(The problem that the invention aims to solve) However, since the injection device is a rubber bag,
The amount of chemical to be injected into the crack is unclear. Therefore, the inside of the crack may not be filled with the chemical solution, and a sufficient repair effect cannot be expected.
Furthermore, since the bag is made of rubber and the contractile force of the rubber is used to inject the chemical into the crack, constant injection cannot be achieved due to changes in the contractile force.

Furthermore, the repair device described in Japanese Utility Model Application Publication No. 59-186350 does not have a means to grasp the amount of chemical solution in the tank, so the amount of chemical solution injected into the crack is unclear, and sufficient repair effect cannot be achieved. I can't wait.

(Means for Solving the Problems) The present invention was proposed in view of the above, and includes a drug solution supply pipe having a pressing part at the tip inside a cylindrical syringe having a first on-off valve at the spout at the tip. is inserted into the cylindrical syringe with the rear part thereof protruding outward from the rear end of the cylindrical syringe, and the inside of the syringe is partitioned into a chemical liquid chamber in front of the pressing part and an air chamber in the rear side of the pressing part,
A second on-off valve is attached to the rear end of the chemical liquid supply pipe protruding from the syringe to the outside, and the chemical liquid chamber described above is a liquid-tight chamber surrounded by the inner surface of the syringe and the front surface of the pressing part,
The air chamber is an airtight chamber surrounded by the rear surface of the pressing part on the inner surface of the syringe, the outer surface of the drug solution supply pipe, and the inner surface of the closing material provided at the rear end opening of the syringe.

(Function) Therefore, in the present invention, the retracted chemical liquid supply pipe is gradually moved forward by compressed air, and the chemical liquid in the chemical liquid chamber can be injected into the crack by the pressing part. When the chemical liquid is injected into the crack by the advancement of the pressing part, the length of the chemical liquid supply pipe protruding outward from the rear end of the cylindrical syringe becomes shorter as the pressing part moves. The amount of drug solution injected can be determined by the change in temperature.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

The repair device of the present invention has the above-mentioned cylindrical portion c of the substrate d.
A cylindrical syringe 1 is provided with a diameter-reducing spout 2 at its tip, and a manually operated first on-off valve 3 is provided on the spout 2. A flange-shaped pressing portion 5 is provided at the tip of the tubular liquid drug supply pipe 4 inserted from the rear end into the inside of the syringe 1 described above, and the tip of the liquid medicine passage 6 in the drug liquid supply pipe 4 is inserted into the inside of the syringe 1. The rear part of the drug solution supply pipe 4 is projected from the rear end of the syringe 1 to the outside. Therefore, the inside of the syringe 1 is partitioned by the pressing part 5 into a liquid medicine chamber 7 on the front side of the pressing part 5 and an air chamber 8 on the rear side of the pressing part 5. The chemical liquid chamber 7 is surrounded by the inner surface of the syringe 1 and the front surface of the pressing part 5 and is liquid-tight. Moreover, the air chamber 8 is connected to the inner surface of the syringe 1, the rear surface of the pressing part 5,
Although it is surrounded by the outer surface of the drug solution supply pipe 4, it is airtightly closed by a closing member 9 made of rubber, for example, provided at the rear end opening of the syringe 1.

The drug solution supply pipe 4 described above can slide in the axial direction of the syringe 1, and has a rear end protruding from the rear end of the syringe 1 to the outside, and a second on-off valve 10 is attached thereto. A chemical liquid supply tube 11 is removably connected to the second on-off valve 10.

In the above configuration, it is desirable that the syringe 1 be molded from a transparent synthetic resin and have scales 12 displayed on its surface. Further, the first on-off valve 3, the spout 2 and the cylindrical portion c, and the second on-off valve 10 and the chemical liquid supply pipe 4 and tube 11 may be tightly connected by a screw mechanism or the like, or may be easily removed. desirable.

The present invention has the above-described configuration, and in order to inject a chemical into the crack a of the concrete wall b using this device, the substrates d are attached to the surface of the concrete wall at appropriate intervals, and the surface of the crack a is closed with a sealant e. After that, the first on-off valve 3 is connected to the tip of the cylindrical portion c. Then, the first on-off valve 3 is closed, the second on-off valve 10 is opened, and the chemical liquid is force-fed from the tube 11 to the chemical liquid supply pipe 4. As a result, the chemical liquid passing through the chemical liquid passage 6 of the chemical liquid supply pipe 4 fills the chemical liquid chamber 7.
The chemical liquid supply pipe 4 gradually retreats, the chemical liquid chamber 7 expands, the air chamber 8 contracts, and the air inside becomes compressed.

Note that when the drug solution is supplied into the drug solution chamber 7, the drug solution supply tube 4 moves back according to the amount of the supplied drug solution, and the drug solution supply tube 4 protrudes from the rear end of the syringe 1 to the outside.
Since the length of is increased, the amount of the chemical liquid in the chemical liquid chamber 7 can be grasped from this increased length.

When the chemical liquid supply pipe 4 is sufficiently retreated together with the pressing part 5, the second on-off valve 10 is closed, the pressure feeding of the chemical liquid from the tube 11 is stopped, and the first on-off valve 3 is opened. As a result, the compressed air in the air chamber 8 gradually expands, the pressing part 5 is pushed, and the chemical solution supply pipe 4 moves forward. Therefore, the chemical liquid in the chemical liquid chamber 7 is injected into the crack a through the cylinder part c. In this case, by adjusting the open state of the first on-off valve 3, the state of the chemical solution injected into the crack can be adjusted.

For example, when the first on-off valve 3 is opened slightly, a small amount of the chemical solution can be injected, and when the first on-off valve 3 is opened widely, a certain amount of the drug solution can be injected. Therefore, the first on-off valve 3 can also adjust the injection time of the chemical solution. Since the amount of the chemical solution injected into the crack a is approximately proportional to the forward movement length of the chemical solution supply pipe 4, it is important to consider how short the length of the chemical solution supply pipe 4 protruding from the rear end of the syringe 1 is. It can be determined by observing the temperature.

In this way, the chemical liquid supply pipe 4 gradually moves forward due to the compressed air in the air chamber 8, and the chemical liquid is injected into the crack a by the pressing part 5. When most of the drug solution has been injected, the first
Either remove the on-off valve 3 from the cylinder part c to finish injecting the chemical solution, or close the first on-off valve 3 and open the second on-off valve 10 to force-feed the drug solution from the tube 11 to the chemical chamber 7. The first on-off valve 3 is opened again, the second on-off valve 10 is closed, and the chemical solution is injected into the crack a.

Therefore, according to the present invention, a large amount of chemical liquid can be injected into the crack, and if both on-off valves 3 and 10 are left open, the chemical liquid pumped from the tube 11 can be directly injected into the crack. . Also,
The amount of chemical liquid to be injected into the crack can be confirmed by the movement state of the scale 12 and the pressing part 5.

(Effects of the invention) In summary, according to the present invention, the state of the chemical solution supplied to the crack can be adjusted by the opening/closing valve of the spout, so the injection of the chemical solution can be adjusted depending on the condition of the crack and the type of the chemical solution. can.

In addition, since the chemical solution is injected using the pressure of compressed air, there is no unevenness in the injection state, and the chemical solution can be filled up to the minute pores of the crack.
Since the amount of the chemical solution to be injected can be accurately determined by changing the length of the chemical solution supply tube protruding from the rear end of the syringe, the repair effect of the chemical solution can be significantly improved.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view showing an embodiment of the present invention;
The figure is a longitudinal cross-sectional view of the syringe filled with drug solution.
FIG. 3 is a schematic perspective view in case of repair. 1 is a syringe, 2 is a spout, 3 is an on-off valve, 4 is a chemical liquid supply pipe, 5 is a pressing part, 7 is a chemical liquid chamber, 8 is an air chamber, and 10 is a second on-off valve.

Claims (1)

[Scope of utility model registration request] A state in which a drug solution supply tube having a pressing part at the tip is placed inside a cylindrical syringe having a first on-off valve at the spout at its tip, with the rear part of the drug solution supply tube protruding outside from the rear end of the cylindrical syringe. partition the inside of the syringe into a chemical liquid chamber on the front side of the pressing part and an air chamber on the rear side of the pressing part, and attach a second on-off valve to the rear end of the chemical liquid supply pipe protruding from the syringe to the outside. The chemical liquid chamber described above is a liquid-tight chamber surrounded by the inner surface of the syringe and the front surface of the pressing part, and the air chamber is defined by the rear surface of the pressing part on the inner surface of the syringe, the outer surface of the chemical liquid supply pipe, and the opening at the rear end of the syringe. A repair device for a concrete structure, characterized by having an airtight chamber surrounded by an inner surface of a closing material provided in the section.