JPH0842727A - Adhesive injecting check valve - Google Patents

Abstract

PURPOSE:To prevent a small lump such as sand, dust, or epoxy resin, even when included in an adhesive, from being caught in a valve body so as to prevent the leak of the adhesive. CONSTITUTION:A thin valve body 6 made of a polymer material which is tapered from a ring base end opening part 6a toward a slit top end opening part 8 is installed at the top end of an adhesive injecting nozzle. Thus, the seal part near the top end opening part of the valve body is easily crushed to block the opening.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adhesive injection check valve used in an adhesive injection method suitable for repairing cracks formed in structures such as concrete.

[0002]

2. Description of the Related Art A conventional check valve of this kind has a fitting recess 3 formed at the tip of an adhesive injection nozzle 1 as shown in FIG.
The outer cover 15 of the check valve 14 is fitted into the outer cover 15, and a disc-shaped valve body 16 is attached to the outer cover 15 so as to be openable and closable by a hinge and to come into contact with the valve seat 17 of the fitting recess 3. Has been. Further, a tubular outer rubber 10 is fitted on the outer circumference of the tip of the nozzle 1.

[0003]

However, when the foot-operated pump is used in the field in the check valve 14 as described above,
Sand and dust are easily mixed in the storage tank for the epoxy resin of the adhesive, and small lumps of epoxy resin, etc., which are generated due to insufficient cleaning of the pump, remain, and these are the valve seat 1.
There was a problem that the packing effect of the check valve 14 was hindered by the leakage of the epoxy resin through the gap between the check valves 7 and 7. Therefore, in view of the conventional problems, the present invention aims to prevent the adhesive from leaking by preventing sand, dust, small epoxy resin particles, etc. from being caught in the valve body even if the adhesive is mixed. Another object of the present invention is to provide a check valve for adhesive injection.

[0004]

In order to achieve such an object, the constitution of the present invention is, as shown in FIG. 1, a slit-like shape from a ring-shaped base end opening 6a at the tip of an adhesive injection nozzle 1. The valve body 6 made of a thin polymer material, which is formed in a tapered shape toward the tip opening portion 8 of the above, is mounted.

[0005]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1 to 4 show a first embodiment of the present invention, in which 1 is a nozzle for injecting an adhesive, which is provided with a tip 4 having a flange 2 and a fitting recess 3 formed on the tip side. Reference numeral 5 is a check valve, which is composed of a valve body 6 fitted in the fitting recess 3 and an outer jacket 7. The valve body 6 is made of a polymer material such as natural rubber, synthetic rubber or synthetic resin, and is formed in a tapered shape from the ring-shaped base end opening 6a toward the slit-shaped tip opening 8. .

Further, the seal portion 9 in the vicinity of the front end opening portion 8 of the valve body 6 is formed so as to be particularly thin and elastic. That is, the valve body 6 is fitted in the fitting recess 3 by fitting the base end opening 6a, and the cylindrical outer jacket 7 is fitted to form the check valve 5. And the above-mentioned tip 4
The outer jacket rubber 10 is fitted around the outer periphery of the flange 11 with its flange 11 joined to the flange 2.

When using the above structure, the epoxy resin as an adhesive is used to open the tip opening 8 of the check valve 5 from the nozzle 1 in the direction of the arrow.
Although the epoxy resin is extruded into the cylindrical outer rubber 10 through this, the sealing portion 9 is easily crushed even if the epoxy resin tries to flow backward due to pressure, and even if there is sand, dust, or a small lump of epoxy resin, it is wrapped and the tip end The opening 8 is completely closed and backflow is prevented.

Of the constituent materials of the check valve 5, the rubber material is preferably polyisoprene of Hs 40 to 80, chloroprene, nitrile rubber, ethylene propylene rubber, urethane rubber, silicone rubber or the like, and as a synthetic resin material. Is preferably polyethylene, polypropylene, soft vinyl chloride or the like.

5 and 6 show the second and third aspects of the present invention, respectively.
In the check valves 12 and 13 of the first embodiment, the former seal portion 12a is formed in a step shape, and the latter seal portion 13a is formed in a quadratic curve shape. It has the same effect as the check valve 5. The base end opening 6a
Other components such as the tip opening 8 and the like are the same as in the first embodiment.

[00010]

As described above, in the adhesive injection check valve of the present invention, since the valve body is thin and formed in a pre-drawing shape, the epoxy resin of the adhesive passes through the nozzle and the tip of the valve body. If you try to flow back with pressure after being pushed out from the opening,
Even if there is sand, dust, small epoxy resin, etc., the seal part near the tip opening of the valve body is easily crushed to wrap it and the opening is surely closed. The adhesive does not leak from the gap created by dust or dirt.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a state in which an adhesive injection check valve according to a first embodiment of the present invention is attached to a nozzle.

FIG. 2 is a front view of a valve body of the above check valve.

FIG. 3 is a side view of the valve body of the above check valve.

FIG. 4 is a plan view of a valve body of the above check valve.

FIG. 5 is a side view of the valve body of the check valve according to the second embodiment of the present invention.

FIG. 6 is a side view of a valve body of a check valve according to a third embodiment of the present invention.

FIG. 7 is a cross-sectional view showing an example of a state in which a conventional check valve for injecting an adhesive is attached to a nozzle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Adhesive injection nozzle 2 Flange 3 Fitting recess 4 Tip 5 Check valve 6 Valve body 6a Base end 7 Outer cover 8 Opening 9 Seal 10 Cylindrical outer rubber 11 Flange 12 Check valve 12a Seal 13 Check valve 13a Seal part

Claims (1)

[Claims] 1. A valve body made of a thin polymer material, which is formed in a tapered shape from a ring-shaped base end opening toward a slit-shaped tip opening, is attached to the tip of an adhesive injection nozzle. A check valve for injecting an adhesive, which is characterized in that