JPH0242952Y2 - - Google Patents

Description

[Detailed description of the invention] A. Purpose of the invention [Field of industrial application] The invention has a space in a reinforced body such as a pipe, which is injected and filled with a resin between the outer peripheral surface of the reinforced body and the reinforced body. The present invention relates to a resin-filled reinforcing case that is fitted onto the outside and has a resin injection hole on the bottom side and a resin outflow hole on the top side.

[Conventional technology]

The resin-filled reinforcing case as described above is well known and is used as a means for reinforcing the internal pressure resistance and external pressure resistance of weak parts of pipes for pumping fluids such as water and oil.

A specific example will be explained with reference to the drawings.

In FIG. 1, 1 is a part of the fluid pumping device, 3
6 is a pipe connection flange (cylindrical joint) that is securely and watertightly attached to the pressurized fluid discharge port 2 of the device with a sealing material (watertight packing) 4 and bolts 5; 6 is the pipe end of the flange; Part insertion hole, 7
is an annular groove for inserting a sealing material formed by enlarging the diameter of the hole edge of the opening on the pipe insertion side of the fitting hole.

Reference numeral 8 denotes a pressure-resistant pipe connected to the flange 3, which includes a main pipe 8a and a pipe 1 that covers the outer periphery of the main pipe 8a.
Layer or layers of reinforcing/protective jacket layer 8b, 8
It is a composite layer pipe consisting of c and has the required internal and external pressure resistance as a whole and other necessary pipe performance.

Reference numeral 10 denotes a resin-filled reinforcing case that also serves as a sealing material pressing pusher, and includes an annular collar seat 11, a sealing material pressing convex ring portion 12 provided concentrically on its inner surface, and concentrically provided on its outer surface. It consists of a cylindrical resin-filled case part 13.

To connect the pressure-resistant pipe 8 to the flange 3, first connect the outer jacket layer 8b at the end of the pressure-resistant pipe 8,
The main pipe 8a is exposed by peeling and removing the pipe 8c over a certain predetermined length. A resin-filled reinforcing case 10, which also serves as a sealing material pusher, is fitted onto the exposed main pipe portion with the case portion 13 side first, and then a ring-shaped sealing material 9 is fitted onto the outside. The ring-shaped sealing material 9 may be previously attached integrally to the tip of the convex ring portion 12, which is a sealing material pusher, on the case 10 side by adhesive, baking, or the like.

Next, the tip of the exposed main pipe is fully fitted into the fitting hole 6 on the flange 3 side, and the annular flange 11 of the case 10 fitted onto the pipe side is sufficiently tightened with the bolt 14 against the flange 3. Then, the ring-shaped sealing material 9 is compressed by the convex ring portion 12 serving as a pusher in the annular groove 7 on the flange side, and due to the compression, the outer periphery of the exposed main pipe fitted into the insertion hole 6 on the flange 3 side becomes ring-shaped. The sealing material 9 is strongly tightened, and the flange 3 and the pipe 8 are firmly connected in a watertight manner.

In addition, the resin-filled case part 13 is located concentrically with the exposed main pipe area l, which is the weak part of the pipe on the outer surface side of the annular collar seat 11, with a space between it and the pipe, and sufficiently covers the part area l. state. Therefore, a resin injection hole 1 is formed on the bottom side of the case part 13.
5, a paste or liquid shaft fat 16 (for example, a paste epoxy resin) is injected into the case portion 13 using a syringe 20. As a result, the space between the pipe and the case is filled with resin from the bottom to the top. As the resin is injected, the air in the space is pushed out and removed from the resin outflow hole 17 (FIG. 2) formed on the upper surface of the case. Eventually, the space will be filled with the injected resin. Even in the full state, in order to eliminate voids (residual air bubbles) as much as possible, the injection of resin is continued for a suitable period of time, so that the resin flows out from the resin outflow hole 17. Carefully remove any spilled resin.

As the resin filled in the case portion 13 hardens, the exposed main pipe portion range 1, which is the weak part of the pipe, is hardened and its internal pressure resistance strength and external pressure resistance strength are reinforced.

[Problem that the invention attempts to solve]

If voids remain in the resin part filled into the case, the voids become weak parts (defects) and reduce the reliability of reinforcement.

Therefore, as mentioned above, even after the inside of the case is filled with the injected resin, the injection of resin is continued to cause the resin to flow out of the case from the resin outflow hole on the top side of the case, thereby eliminating the void part. However, in the conventional case, the resin outflow hole 17 is 1 as shown in the second figure.
Since only one injector is provided, there is a large resistance to injecting the resin into the case, and the overall flow of the injected resin within the case is uneven, non-uniform, and slow, and void elimination is poor. Therefore, even after the inside of the case is filled with the injected resin, the injection of resin actually continues for a considerable period of time, and during that time, a large amount of resin flows out of the case and is wasted. Furthermore, even with such treatment, voids are not completely eliminated,
In the end, voids of varying sizes often remain.

The present invention shortens the resin injection time that continues even after the case 13 is filled with the injected resin 16, thereby reducing the amount of wasted resin, and completely eliminating voids (voidless). The purpose is to make it possible to achieve this goal.

B. Structure of the invention [Means for solving the problem] The present invention is a method of fitting an object to be reinforced such as a pipe into a space in which a resin is injected and filled between the outer peripheral surface of the object and the outer peripheral surface of the object. , a resin-filled reinforcing case having a resin injection hole on the bottom side and a resin outflow hole on the top side, characterized in that a plurality of resin outflow holes are provided at the top of the top side of the case. This is the summary of the reinforced case.

[Effect]

By having multiple resin outflow holes on the top of the case and locating them at the top of the case, the resistance to resin injection into the case is reduced, and the overall flow of the injected resin inside the case is smooth and uniform. be converted into Therefore, the voids smoothly move to the upper part of the case along with the smooth resin flow, and are eliminated in a short time together with the resin flowing out of the case from each resin outflow hole. Therefore, even if the resin injection time that must be continued even after the inside of the case is filled with the injected resin is short, voids are completely eliminated and the amount of wasted resin is significantly reduced.

〔Example〕

The resin-filled reinforcing case 10 which also serves as a sealant pusher shown in the first figure has two resin outflow holes 17a in the uppermost surface of the case part 13 along the longitudinal direction (generating line direction) of the case part 13 according to the present invention. , 17b, and an upward vertical hole 17c as a resin outflow hole communicating with the inside of the case is formed within the thickness of the uppermost part of the flange seat 11. In this way, a plurality of resin outflow holes 17a, 17
By arranging b and 17c at the top, voidless resin filling can be achieved while reducing the amount of wasted resin as explained in the section of the function.

In addition, in FIGS. 1 and 2, 18 is the case part 13.
It is a ring-shaped sealing material that is integrally provided on the periphery of the opening on the tip side of the case part 13 by adhesive or baking.
It serves to seal the external fitting gap between the

C. Effect of the invention As described above, according to the invention, in this type of resin-filled reinforced case, a plurality of resin outflow holes are located at the top of the case top surface, so that the filled resin can flow out from multiple locations. In addition, the flow length of the resin is short, and the flow path is less curved, so that the resin injection resistance is reduced.

As a result, the resin can be smoothly and uniformly injected and filled into the resin-filled reinforced case in a short time without generating voids.

Furthermore, the reliability of reinforcement can be greatly improved, and the amount of wasted resin is small, making it economical, and the intended purpose can be well achieved.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a row of pipe connections using the reinforcing case according to the present invention, and FIG. 2 is a longitudinal sectional view of the main part of the conventional case. 3 is a pipe connection flange, 8 is a pressure-resistant pipe,
10 is a resin-filled reinforced case that also serves as a sealing material pusher;
13 is a case part, 15 is a resin injection hole, 17, 17
a, 17b, and 17c are resin outflow holes, and 16 is injected and filled resin.

Claims (1)

[Scope of utility model registration request] Fitted onto an object to be reinforced such as a pipe, leaving a space between the outer peripheral surface of the object and the resin to be injected and filled,
A resin-filled reinforced case having a resin injection hole on the bottom side and a resin outflow hole on the top side, characterized in that a plurality of resin outflow holes are located at the top of the top side of the case. .