JP2005320796A - Grout agent injection plug - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a grout injection plug capable of satisfying any request of pressure-proof strength, installation strength and the volume, by setting a dimension of respective parts of a pressure tank in the injection plug under an optimal condition. <P>SOLUTION: The pressure tank 3 in the injection plug of a grout, is composed of a tank body 9 formed by using a synthetic resin for visually confirming the inside grout, and a connecting port 12 integrally arranged on the lower end side of this tank body 9 so as to become a diameter smaller than the tank body 9. In this pressure tank 3, the thickness T of the tank body 9 is set 0.4 mm to 2 mm; a diameter W around a body is set 10 mm to 30 mm; the length H is set 30 mm to 90 mm; and an inner diameter R of an entrance is set 1 mm to 5 mm. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a grouting agent injection plug for injecting a grouting agent into a gap such as a crack generated in a concrete structure and repairing a gap such as a crack.

  If a gap such as a crack generated in a concrete structure is left untreated, water leakage, cracking of concrete, peeling of a tile attached as an exterior material, and the like occur. Therefore, it is necessary to fill the gap such as a crack by injecting a grout agent.

  A conventional injection plug for injecting a grouting agent into a gap such as a crack as described above has a nipple through which an injection path of the grouting agent penetrates, a mounting seat on one end side and a check valve on the injection path on the other end side. Is formed by a combination of a cylindrical plug body provided with a pressure tank that is attached in the middle of the plug body so as to communicate with a grout agent injection path and accumulates the grout agent flowing in from the injection path.

  The pressure tank is made of a synthetic resin that allows the internal grout agent to be seen, and is formed into a hollow cylindrical body that is closed at one end, and is integrated with the other end of the tank so that it has a smaller diameter than the tank body. A grout agent entrance and exit that communicates with the inside of the pressure tank penetrates, a stopper is provided in the middle of the outer periphery, and is formed by a connection port that is screwed into a screw tube provided in the middle of the plug body. .

  In order to inject a grouting agent into a gap such as a crack using the injection plug as described above, the plug main body is attached to the mounting seat so that the injection path leads to the generated crack with respect to the outer surface of the concrete structure. This is fixed by adhesive fixing, a pressure tank is attached to the plug body, and the other part of the crack on the outer surface of the concrete structure is closed with a sealing material, and a grout injection pump is connected to the nipple. When the grouting agent is pushed out, the grouting agent flows into the crack from the injection path, and when the grouting agent is injected into the crack, the grouting agent pushed out from the injection pump enters the pressure tank and is sealed. The internal air is compressed by the intrusion of the grout agent, and the grout agent in the pressure tank is accumulated.

  When a predetermined amount of grout agent enters the pressure tank, the grout agent injection pump is removed from the nipple to finish the injection process, and pressure is applied to the grout agent flowing into the crack by the compressed air in the pressure tank. As a result, the crack can penetrate into the thin cracks with time, and the entire crack can be filled with the grout agent, and the repair of the crack is completed by the hardening of the grout agent (see Patent Document 1).

By the way, the pressure tank in the injection plug of the grouting agent as described above accumulates the grouting agent with compressed air, so that sufficient pressure strength is required and the grouting agent is prevented from leaking with respect to the plug body. Mounting strength is required, and a volume that does not waste the grout agent must be secured.
Japanese Utility Model No.4-11080

  However, the pressure tanks in the conventional injection plugs do not sufficiently satisfy the requirements in terms of pressure strength, mounting strength, and volume, and it is currently desired to improve pressure strength, mounting strength, and volume. It is.

  Accordingly, an object of the present invention is to provide a grouting agent that can satisfy any requirements of the pressure strength, the mounting strength, and the volume by setting the dimensions of each part of the pressure tank in the injection plug to optimum conditions. It is to provide an injection plug.

  In order to solve the above-described problems, the present invention provides a plug body in which a grout injection path passes, a mounting seat on one end side and a check valve on the injection path on the other end side, In the grout agent injection plug, which is attached to the grout agent in the middle and connected to the pressure tank for accumulating the grout agent flowing in from the injection passage, the pressure tank visually checks the internal grout agent. Using a possible synthetic resin, a hollow tank body with one end closed and a grout agent inlet / outlet that is integrated with the other end of the tank body to have a smaller diameter than the tank body and communicates with the inside of the pressure tank , And a stopper is provided in the middle of the outer periphery, and includes a connection port attached in the middle of the plug body. This pressure tank has a tank body thickness of 0.4 mm to mm, in which the diameter of the waist is 10 mm to 30 mm, a length 30Mm～90mm, entrance inside diameter is adopted the configuration that is set to 1 mm to 5 mm.

  The pressure tank is made of a transparent or translucent synthetic resin such as polyethylene, and is formed of a hollow cylinder with a hemispherical closed tank body and a connection port formed integrally by blow molding. A stopper provided in the middle of the outer periphery of the stopper is formed at a position offset from the axis of the main body. The stopper is formed by a flange, and the outer peripheral surface from this flange to the tip is screwed into a screw cylinder provided in the middle of the plug main body. Male threads are formed.

When the connection port is screwed into the screw cylinder, the stopper comes into contact with the upper end of the screw cylinder and seals the mounting part, but a packing is interposed between the stopper and the screw cylinder to make the seal more reliable. May be.

  According to this invention, since the thickness of the tank body using synthetic resin is set to 0.4 mm to 2 mm, the pressure strength of the pressure tank can be set to a strength that can withstand a pressure of 0.1 MPa or more. It is possible to sufficiently ensure the pressure strength.

  In addition, since the diameter of the tank body around the trunk is set to 10 mm to 30 mm and the length is set to 30 mm to 90 mm, it is possible to secure a sufficient amount of injection by the accumulated pressure of the grout agent to enter, and at the same time, the remaining grout agent The volume can be reduced, and waste of the grout agent can be suppressed.

  Furthermore, since the inner diameter of the inlet / outlet in the pressure tank is set to 1 mm to 5 mm, the dimensions are optimal to secure the attachment strength of the inlet / outlet screwed into the screw cylinder provided in the middle of the plug body, and provided in the middle of the outer periphery. When the stopper is in contact with the screw cylinder, the sealing performance of the attachment portion is improved, and leakage of the grout agent can be reliably prevented.

  Hereinafter, embodiments of the present invention will be described based on illustrated examples.

  As shown in FIGS. 1 and 2, the grout injection plug 1 is composed of a combination of a plug body 2 fixed to the outer surface of the concrete structure A and a pressure tank 3 attached to the plug body 2. The main body 2 is formed in a cylindrical shape using a synthetic resin, and a grout agent injection path 4 penetrates along the axial center thereof, a disc-shaped mounting seat 5 on one end side, and an injection path 4 on the other end side. A nipple 7 having a check valve 6 is provided, and a screw cylinder 8 for attaching the pressure tank 3 to a position in the middle is projected in a branched shape.

  Further, the pressure tank 3 is made of a synthetic resin capable of visually observing the grout agent inside, and has a hollow cylindrical body 9 whose upper end is closed, and a lower diameter than the tank body 9 on the lower end side of the tank body 9. A grout agent inlet / outlet port 10 that is integrally provided and communicates with the inside of the pressure tank 3 passes therethrough, a stopper 11 is provided in the middle of the outer periphery, and a connection port 12 that is screwed into the screw cylinder 8 of the plug body 2 to be attached. And is formed.

  The pressure tank 3 is made of a transparent or semi-transparent synthetic resin such as polyethylene (PE) or polypropylene (PP). The tank body 9 and one end side of the tank body 9 are closed in a semispherical shape and blow-molded. The connection port 12 is provided at a position near the outer periphery with respect to the axis of the tank body 9, and the lower wall of the tank body 9 is an inclined wall 13 that is lowered toward the connection port 12. A stopper 11 provided in the middle of the outer periphery is formed by a flange, and a male screw 14 to be screwed into a screw cylinder 8 provided in the middle of the plug body 2 is formed on the outer peripheral surface from the flange to the tip.

  Although the tank body 9 of the pressure tank 3 is formed in a cylindrical shape in the illustrated case, it can be formed in an elliptical shape or a cylindrical shape of various polygons. In the material used for forming the pressure tank 3, polyethylene (PE ) Has the advantage that there is no deformation due to cracking or swelling due to its stickiness and strength.

  As shown in FIG. 3, such a pressure tank 3 has a thickness T of the tank body 9 of 0.4 mm to 2 mm, a diameter W around the trunk of 10 mm to 30 mm, a length H of 30 mm to 90 mm, The inner diameter R is set to 1 mm to 5 mm.

  The pressure tank 3 is required to have a strength that can withstand a pressure with a pressure strength of 0.1 MPa or more. For this reason, the thickness T of the tank body 9 is required to be 0.4 mm or more. By setting the pressure within the range of 2 mm, the pressure strength of the pressure tank 3 can be sufficiently secured.

  Here, examples of the grouting agent to be injected into the cracks of the concrete structure include epoxy resin, urethane foam, cement slurry, emulsion, and the like. And the heat resistance can also be cleared by setting the thickness T of the tank body 9 in the range of 0.4 mm to 2 mm.

  Note that if the thickness T of the tank body 9 is 0.4 mm or less, the pressure strength and heat resistance cannot be secured, and if the thickness T is 2 mm or more, the strength becomes excessive and the material is wasted. In addition, the moldability during blow molding also deteriorates. Note that blow molding is inexpensive in the manufacture of molds and enables integral molding of a pressure tank having a cylindrical bag shape.

  In addition, by setting the diameter W around the trunk of the tank body 9 to 10 mm to 30 mm and the length H to 30 mm to 90 mm, it is possible to ensure a sufficient injection amount due to accumulated pressure of the grout agent to enter, while at the same time remaining Therefore, the volume of the grout agent to be reduced can be reduced, and waste of the grout agent can be suppressed.

  If the diameter W around the trunk of the tank main body 9 is set to 10 mm or less and the length H is set to 30 mm or less, the capacity becomes too small, the number of injections increases, and the working efficiency deteriorates.

  On the other hand, if the diameter W around the trunk of the tank body 9 is set to 30 mm or more and the length H is set to 90 mm or more, the capacity becomes too large, and the amount of the remaining grout agent increases, resulting in waste of the grout agent. Since the pressure tank 3 is increased in size, there is a problem that the installation place is restricted.

  In the connection port 12, by setting the inner diameter R of the entrance / exit 10 to 1 mm to 5 mm, it becomes an optimum dimension for securing the attachment strength of the connection port 12 screwed into the screw cylinder 8 provided in the middle of the plug body 2, In addition, since the stopper 11 provided in the middle of the outer periphery abuts on the upper end of the screw cylinder 8, the sealing performance of the mounting portion is improved, and leakage of the grout agent can be reliably prevented.

  Here, when the inner diameter of the inlet / outlet 10 is set to 1 mm or less, when a grouting agent having a high viscosity is used, when the grouting agent is injected from the nipple 7 toward the crack by the injection pump, the grouting agent is injected into the pressure tank 3. Resistance occurs in the inflow, so that an excessive pressure is applied to the bonding portion of the mounting seat 5, the mounting seat 5 is peeled off from the concrete structure A, and the plug body 2 falls off, and the pressure tank 3 is attached to the plug body 2. There is a problem in that pressure is also applied to the portion and the male screw 14 of the connection port 12 is damaged.

  If the inner diameter of the entrance / exit 10 is set to 5 mm or more, the peripheral wall of the connection port 12 becomes large and it is difficult to secure the mounting strength with respect to the plug body 2, and the plug body 2 is caused by the pressure generated in the pressure tank 3. The grout agent leaks from the mounting portion of the pressure tank 3 against the.

  The injection plug 1 for the grouting agent of the present invention has the above-described configuration. In order to inject the grouting agent into gaps such as cracks, the outer surface of the concrete structure A was generated as shown in FIG. The plug body 2 is fixed by adhering the mounting seat 5 so that the injection path 4 leads to the crack, and the pressure tank 3 is screwed into the screw cylinder 8 of the plug body 2 to mount the crack on the outer surface of the concrete structure A. When the grout agent injection pump is connected to the nipple 7 with the other portion closed by the sealing material, and the grout agent is pushed out by this injection pump, the grout agent flows into the crack from the injection passage 4 and enters the crack. When the grouting agent is injected, the grouting agent pushed out from the infusion pump enters the pressure tank 3, and the sealed pressure tank 3 is used to inject the grouting agent. Internal air is compressed, it accumulates the grout agent in the pressure tank 3 I.

  When a predetermined amount of grout agent enters the pressure tank 3, the grout agent injection pump is removed from the nipple 7 to finish the injection process. The grout agent that has flowed into the crack is caused by compressed air in the pressure tank 3. When pressure is applied and the grout agent in the pressure tank 3 is pushed out and replenished with respect to the cracks, it penetrates into the narrow part of the cracks with time, and the entire cracks can be filled with the grout agent. The crack repair is completed by the hardening of the grout agent.

  The injection plug 1 for the grouting agent of the present invention sufficiently secures the pressure strength of 0.1 MPa or more necessary for the pressure tank 3 by setting the thickness of the pressure tank 3 in the range of 0.4 mm to 2 mm. In addition, by setting the diameter W around the trunk of the tank main body 9 to 10 mm to 30 mm and the length H to 30 mm to 90 mm, it is possible to ensure a sufficient amount of injection by accumulating the grout agent to enter. At the same time, the volume of the remaining grout agent can be reduced, and waste of the grout agent can be suppressed.

  Moreover, in the connection port 12, it becomes an optimal dimension in order to ensure the attachment strength of the connection port 12 screwed in the screw cylinder 8 provided in the middle of the plug main body 2 by setting the internal diameter of the entrance / exit 10 to 1 mm-5 mm, In addition, since the stopper 11 provided in the middle of the outer periphery abuts the screw cylinder 8, the sealing performance of the mounting portion is improved. Further, as shown in FIG. 2, the packing is provided between the stopper 11 and the upper end of the screw cylinder 8. 15 may be interposed to make the seal more reliable, and in any case, leakage of the grout agent can be reliably prevented.

Exploded perspective view showing the injection plug of grouting agent Longitudinal sectional view of the grout preparation in use showing the injection plug Longitudinal sectional view showing a pressure tank of the present invention used for an injection plug of a grout agent

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Grout agent injection plug 2 Plug body 3 Pressure tank 4 Grout agent injection path 5 Mounting seat 6 Check valve 7 Nipple 8 Screw 9 Tank body 10 Grout agent inlet / outlet 11 Stopper 12 Connection port 13 Inclined wall 14 Male thread 15 Packing

Claims (1)

The grout agent injection path penetrates, and is attached so as to communicate with the grout agent injection path in the middle of the plug body with a mounting seat on one end side and a check valve provided on the injection path on the other end side. In the injection plug of the grout agent comprising a combination with a pressure tank for accumulating the grout agent flowing in from the injection path,
The pressure tank is made of a synthetic resin capable of visually observing the grout agent inside, and is provided integrally with a tank body that is hollow and closed at one end side, and has a smaller diameter than the tank body at the other end side of the tank body, The inlet / outlet of the grouting agent communicating with the inside of the pressure tank penetrates, a stopper is provided in the middle of the outer periphery, and a connection port is provided in the middle of the plug body. This pressure tank has a wall thickness of 0 A grout injection plug characterized by having a diameter of 4 mm to 2 mm, a diameter of the circumference of the body of 10 mm to 30 mm, a length of 30 mm to 90 mm, and an inner diameter of the entrance / exit of 1 mm to 5 mm.

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