JP2001173239A - Plug for injecting repairing agent - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pressure resistant plug with check valve for injecting a repairing agent, which is easy to mount and demount. SOLUTION: This is a plug for injecting a repairing agent, which is inserted in a hole of an object formed and fixed thereat, and then injects the repairing agent having a post-fluidization characteristic through an injector. The plug comprises a cylindrical body having a protrusion for tightly fixing a plug body into the hole, an inner through hole for the injection of repairing agent, an opening hole for making the agent flow out to the inside of the hole through the through hole, and a male structure for threadably fitting the plug body to the jig of the injector, and a tube having elasticity provided on the outer circumference of the cylindrical body under the state to close the opening hole.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plug for injection of a repair agent having a good injection performance, and more particularly, to a plug or a hole which causes water leakage and fills a gap between the crack and the hole to prevent the leakage of water. The present invention relates to an injection plug for injecting a repair agent that can be blocked into a repair target.

[0002]

2. Description of the Related Art Many structures made of cement-based materials such as concrete are subject to aging of concrete, neutralization due to the external environment, salt damage, alkali-aggregate reaction, poor construction, drying shrinkage, vehicle vibration, earthquake, and the like. Phenomena such as generation of cracks and peeling of the surface occur. Normally, such repair of cracks and peeling is generally performed by applying or injecting a repair agent based on an epoxy resin or ultrafine polymer cement to a repair target portion such as a hole, a crack or a gap.
Above all, the injection of repair agent is an extremely effective means of repairing the repair target area, and the high-pressure injection method, in which the injection of the repair agent is performed at high pressure, is known as a method that sufficiently spreads the repair agent even to cracks in the deep part. I have. In the high-pressure injection method, generally, near the surface crack, many holes are drilled to reach the crack inside the building, and a pressure-resistant plug for injection with a check valve is attached to the hole, and the injector is connected through this. This is a method of injecting a repair agent. A conventional high-pressure injection method of a repair agent using a pressure-resistant plug for injection with a check valve will be described below with reference to FIG.

A conventional pressure-resistant plug for injection with a check valve is shown in FIG.
As shown in (a), the nipple member 22, a male screw member 24, a rubber packing material 26, and a washer 28 with a pull-out prevention mechanism are provided. Nipple member 2
2 is a nipple head 22 having an outer shape such that it can be connected in a liquid-tight manner with an injection coupling of a device for injecting a high-pressure fluid.
a and a nipple main body 22c having a hexagonal nut portion 22b engaged with a rotating means such as a wrench or a spanner. A central hole 22d penetrating in the longitudinal direction is formed at the center thereof, and a female screw 22e is formed over a predetermined length from an end of the central hole 22d on the nipple body side (left end in the figure).

The male screw member 24 is formed integrally with a large-diameter base 24a and a stem portion 24c having a male screw 24b screwed into the female screw 22e of the nipple member 22 on the outer peripheral surface. is there. A central hole 24d penetrating in the longitudinal direction communicating with the central hole 22d of the nipple member 22 is formed at the center thereof. Base 24a of center hole 24d
An annular seat 24e is provided at a predetermined position on the side, and a coil spring 24g that presses a ball 24f against the annular seat 24e to prevent backflow of fluid is mounted.

[0005] Rubber packing material 26 and washer 28
Is mounted around the stem portion 24c of the male screw member 24. Although not shown, the washer 28 is provided with a plurality of hooks for preventing the rubber packing material 26 from moving in the compression direction (left side in the figure) but not in the direction in which the washer 28 comes off. The above-described operation is performed by engaging the slip-off preventing claw with the male screw 24b of the stem portion 24c from four rounds.

A conventional high-pressure injection method is, for example, shown in FIG.
(C). That is, a hole 36 having a diameter slightly larger than the outer diameter of the high-pressure fluid injection plug 20 is formed in the wall 34 of the building. The hole 36 needs to be continuous with a crack 34 a generated in the wall 34. An injection pressure-resistant plug with a check valve is inserted into the hole 36 so that the hexagon nut portion 22b is exposed outside the wall 34. Next, the hexagon nut portion 22b is rotated using a rotating means such as a spanner or a hexagon wrench. As a result, the female screw 22e of the nipple member 22 is
4b so as to be screwed deeply. Nipple member 22
The gap between the end face of the male screw member 24 and the base 24a of the male screw member 24 becomes small, so that the rubber packing material 26 is compressed and contracted in the longitudinal direction and expanded in the circumferential direction to be tightly fixed to the hole 36 in the wall 34. Next, the nipple head 22 of the injection pressure-resistant plug with a check valve of the equipment used when injecting the repair agent is used.
engage with a and inject the repair agent.

After the injection is completed, the nipple member 22 is removed from the injection pressure-resistant plug with a check valve by rotating the hexagon nut portion 22b of the nipple member 22 in the reverse direction by a rotating means such as a spanner. The work is completed by filling the joint material 38. As described above, the conventional pressure-resistant plug with a check valve requires complicated work and time when used,
It also consisted of many parts.

[0008]

SUMMARY OF THE INVENTION The present invention relates to an installation,
An object of the present invention is to provide a pressure-resistant plug with a check valve for injecting a repair agent, which is easy to remove and has few parts.

[0009]

Means for Solving the Problems The present inventors have conducted intensive studies to solve the above-mentioned problems, and as a result, have reached the present invention. That is, the present invention provides (1) a repair agent injection plug for injecting a flowable repair agent through an injector after drilling a hole in the object to be repaired, inserting the hole into the hole, fixing the hole, and fixing the hole in the hole. (A) a projection for tightly fixing the plug body in the hole, an inner through hole for injecting a repair agent, an opening hole for allowing the repair agent to flow out of the inner through hole into the hole, and A cylinder having a male structure for engaging the plug body with the jig of the injector; and (b) a resilient tube provided on an outer periphery of the cylinder in a state where the opening is closed. (2) The plug according to the above (1), wherein the repair agent is used for stopping water.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The plug for injecting a repair agent according to the present invention comprises a cylinder and an elastic tube. The cylinder has a projection 1 for tightly fixing the plug in a hole formed in the object to be repaired, an inner through hole 2 for injecting a repair agent, an opening 3 for flowing it into the hole, and a plug for injection. It has a male structure 4 for engaging a jig of the vessel. One example of a cylinder constituting the plug for injecting a repair agent of the present invention is shown in FIG. 1 in an orthographic view. The shape of the projection 1 is such that the plug can be easily inserted when the plug is inserted into the drilled hole, and the plug can be firmly fixed so that the plug does not pop out when the repair agent is injected and internal pressure is applied. There is no particular limitation. For example, a shape having a part of a tapered structure or a conical structure in which the diameter decreases in the plug insertion direction may be mentioned, and specifically, the shapes shown in FIGS. The length of the projection 1 in the plug axis direction is arbitrary, but is usually 5 to 30 mm, preferably 10 to 20 mm.
mm. The diameter of the projection 1 is preferably at least 1 mm larger than the diameter of the cylindrical portion.

The diameters of the inner through hole 2 and the opening hole 3 are arbitrary as long as they can be accommodated in the male structure 4, but are usually 1.5 to 3.0 m.
m, preferably 2.0 to 2.5 mm. The length of the cylindrical portion having the opening 3 is arbitrary, but the length of the cylindrical portion (x in FIG. 1) opposite to the projection 1 from the opening 2 is determined by the elastic tube 5 (described later) and the cylindrical In order to make the function of the check valve by the part and the opening 2 sufficiently function, it is 5 mm or more, preferably 10 mm or more. The length (y in the figure) of the cylindrical portion having the male structure is arbitrary, but is preferably 15 mm or more. The length of the entire cylinder is arbitrary, but is preferably 25 mm or more, and particularly preferably 35 to 60 mm in order to sufficiently and sufficiently exhibit the function of each part. The diameter of the cylindrical portion having the male structure 4 and the diameter of the cylindrical portion having the opening 3 are preferably the same, specifically, at least 6 mm or more.

FIG. 5 shows a state in which the plug for injecting a repair agent of the present invention in which the elastic tube 5 is attached to the cylinder of FIG. 1 is used. In use, first, a hole having a diameter slightly larger than the outer diameter of the plug in which the protrusion 1 and the elastic tube 5 are combined is formed in the object to be repaired, and the repair agent injection plug of the present invention is inserted into the hole entrance. I do. The plug for injection of a repair agent according to the invention is tightly fixed in the hole at the projection 1 in order to press the elastic tube against the hole. At this time, there is no need to turn the screw, and it is sufficient to simply push in. The repair agent is bored from the injector engaged with the male structure 4 through the inner through hole 2 and out of the opening 3 through the gap between the elastic tube 5 and the cylindrical body having the opening 3. Is injected into the hole. The pressure inside the hole is increased by the injection of the repair agent, but since the elastic pipe 5 and the cylindrical body having the opening 3 are in close contact with each other, they have the function of a check valve. Makes it difficult for the repair agent to flow backward. The protrusion 1 makes it difficult for the repair agent to leak out of the hole because the plug for injecting the repair agent of the present invention is tightly fixed to the hole formed by pushing and expanding the rubber. After finishing the injection, make sure that it has been repaired,
The injector can be removed and the male structure 4 can be used to pull out with a nail or the like, and the plug can be used again for injection. The material of the plug is not particularly limited as long as it can be processed into a predetermined shape and does not deform under the pressure applied during injection. Examples thereof include metals such as SUS and brass, and various hard plastics.

The length of the elastic tube 5 must be longer than the total length of the cylindrical portion having the projection 1 and the opening 3. The inner diameter of the elastic tube 5 is the opening 3
The diameter is preferably equal to or slightly smaller than the diameter of the cylindrical portion having If the inner diameter of the elastic tube is larger than the diameter of the cylindrical portion having the opening 3, the adhesion between the elastic tube and the opening may be poor, and the tube may not function as a check valve. Conversely, if the inner diameter of the elastic tube 5 is too small than the diameter of the cylindrical portion having the opening 3, the elastic tube 5 and the opening 3 may be too close to each other, making it difficult to inject the repair agent. There is. The thickness of the elastic tube 5 is arbitrary, but if it is too thin, it may be damaged when inserted, and if it is too thick, the fixing force by the projection 1 may be weak, so that it is usually 1 to 5 mm, preferably 2 to 2 mm. 3 mm. If the material of the tube having elasticity is too hard, it becomes difficult to insert the material. If the material is too soft, the fixing force at the time of insertion becomes weak. Therefore, a material having an appropriate hardness is preferable. Specific examples include vinyl chloride, synthetic rubber, natural rubber, and silicone rubber. Further, a blade rubber tube reinforced with a nylon thread or the like may be used.

The object to be repaired to which the plug of the present invention can be applied is concrete, mortar, ALC, or the like. There is no particular limitation.

The repair agent injected using the plug of the present invention is not particularly limited as long as it is a fluid repair agent that can pass through the inner through-hole 2. Specific examples of the repairing agent that can be used include organic-inorganic composite waterproofing agent, epoxy resin injecting agent, silicone-based sealing agent, urethane-based sealing agent, sealing agent such as polysulfide-based sealing agent, polymer cement slurry, ultrafine slag cement. And the like, and a repair agent for the purpose of stopping water such as an organic-inorganic composite water stopping agent containing a superabsorbent polymer or the like is preferable.

When it is intended to repair a crack in an inorganic material structure or the like using the repair plug of the present invention, first, the place where the crack has occurred is visually observed and the injection position is set. In the case where the thickness of the structural body is about 800 mm and the injection positions are set at intervals of 300 to 350 mm in a staggered manner with a crack interposed therebetween, the injection position is drilled and the plug of the present invention is inserted. At this time, since the plug does not need to be turned, the plug can be quickly mounted even if there are many injection points. Next, a repair agent is injected using a high-pressure injector or the like. After confirming that the repair agent has entered the cracks, cure the plug with the plug on. The curing time varies depending on the type of the repair agent and the injection amount, but in the case of the waterproofing agent, which is a preferred repair agent in the present invention, curing is required for 2 to 3 hours after the injection. After curing for a predetermined time, check the repair effect and remove the plug if necessary. Thereafter, the injection hole can be filled to repair the crack.

[0018]

The plug for injecting a repair agent according to the present invention has a simple structure and can inject a repair agent without any difficult work, and is further pulled out from a repaired portion by a nail or the like, and used again for injection. You can do it. Therefore, it is useful for improving the workability of the repair agent injection.

[Brief description of the drawings]

FIG. 1 is an orthographic view of a cylinder used for a plug for injecting a repair agent according to the present invention.

FIG. 2 is an orthographic projection of a cylinder used for a plug for injecting a repair agent according to the present invention.

FIG. 3 is an orthographic view of a cylinder used for a plug for injecting a repair agent according to the present invention.

FIG. 4 is an orthographic view of a cylinder used for a plug for injecting a repair agent according to the present invention.

FIG. 5 is a conceptual diagram showing a use state of the plug for injecting a repair agent of the present invention.

FIG. 6 shows an example of a conventional plug for injecting a repair agent.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1; Projection 2; Internal through hole 3; Opening hole 4: Male type structure 5; Elastic tube

Claims (2)

[Claims] 1. A plug for injecting a repairing agent for injecting a flowable repairing agent through an injector after a hole is drilled in the object to be repaired, inserted into the hole, and fixed in the hole, (A) a projection for tightly fixing the plug body in the hole, an inner through hole for injecting the repair agent, an opening hole for allowing the repair agent to flow out of the inner through hole into the hole, and an injector A repair comprising: a cylinder having a male structure for engaging a plug body with a jig; and (b) an elastic pipe provided on an outer periphery of the cylinder in a state where the opening is closed. Plug for agent injection. 2. The plug according to claim 1, wherein the repair agent is used for stopping water.