KR200275591Y1 - Stoper for pipe - Google Patents

Abstract

The present invention relates to a pipe stopper for blocking the leakage of fluid by inserting through the end of the various pipes including the cooling pipe of the mold and then expanding the annular elastic member according to the principle of screw and wedge to close the end of the pipe. As; Expansion rubber ring (4) having a diameter that is inserted into the pipe as an elastic material; A base member 6 having a rubber ring seating surface 6a on which the expansion rubber ring 4 is seated; A pressurizing ring (8) for expanding the pressurized ring by being pressed on the upper surface of the expandable rubber ring (4); An auxiliary extension ring 20 mounted on the pressure ring upper surface; A sheet 12 having a tapered bottom surface 12a mounted on an upper surface of the auxiliary extension ring 20; And screwing means for fastening the expansion rubber ring and the auxiliary expansion ring radially in the pipe by screwing the seat 12 and the base member 6, wherein the screwing means is an L wrench. It can be easily removed from the pipe by being characterized in that the form is fastened or dismantled by, has the advantage of applying a large torque.

Description

Pipe Stopper {Stoper for pipe}

The present invention relates to a stopper for closing the end of the hollow pipe, and more particularly to a pipe stopper for blocking the outflow of the cooling water by blocking the end of the various pipes used for the cooling device of the mold and the like.

The mold cooling device is provided with a plurality of pipes. The end of the pipe should be sealed to prevent the leakage of cooling water and the like. In the related art, after tapping the inner circumference of the pipe tip, a tab bolt is fastened. For reference, such a tab bolt may be referred to as "blind plug" in the art. Conventionally, in order to seal the pipe, a tape was wound around the threaded outer surface of the tab bolt to maintain airtightness, or even sealed with an adhesive.

On the other hand, in order to seal a variety of pipes of relatively small diameter as well as the cooling device of the mold, tapping as described above was essential. In order to alleviate the inconvenience of such a task, a pipe stopper as illustrated in FIGS. 1 to 2 has been conventionally provided. 1 is an exploded perspective view thereof, and FIG. 2 is a cross-sectional view for explaining a use example.

The pipe plug 1 basically uses the principle of screw and wedge, which converts the axial force generated by tightening the bolt 2 into a force for expanding the rubber ring 4 in its radial direction. It is based on action.

The expansion rubber ring (4) from above the base member (6) having a rubber ring seating surface (6a) to which the female screw (6b) can be machined to fasten the bolt (2) and to seat the expansion rubber ring (4). , The pressing ring 8, the expansion spring 10, the seat 12 and the bolt (2) are sequentially coupled. The lower part of the sheet 12 is formed with a tapered surface, and the tapered surface 8a is formed on the inner circumference of the upper end of the pressing ring 8 at an angle corresponding to the tapered surface 12a of the sheet. The bottom face 8b of the pressure ring is formed with a taper to penetrate and expand the inside of the expansion rubber ring.

The rubber ring seating surface 6a of the base member is subjected to serration processing to prevent slippage of the expansion rubber ring 4. The serration is usually formed by pressing and molding by pressing.

As the bolt 2 is fastened to the base member 6 by a single-headed (or minus) driver, the pressure ring 8 pushes into the expansion rubber ring and expands the ring, thereby causing it to be shown in FIG. 2. Press the inner surface (P ') of the pipe. After the expansion rubber ring reaches its limit, further expansion of the bolt causes the expansion spring 10 to expand secondly. The expansion spring 10 compresses the inner circumferential surface of the pipe to allow the pipe stopper 1 to more tightly seal the pipe P.

The problem of the conventional pipe plug 1 as described above is as follows. In other words, once the pipe plug is inserted into the pipe, there is no way to remove it. In other words, there was no way to dismantle the pipe plug except to dismantle the pipe by applying a back pressure or by drilling and breaking. This was inconvenient and wasteful for the purpose of recycling pipes and pipe plugs.

The purpose of the present invention for the above problems, to improve the conventional pipe plug is more useful, and to reduce the manufacturing cost. More specifically, it is an object of the present invention to provide a pipe plug of a structure which is easy to dismantle and which can withstand greater pressure. Detailed objectives of the present invention can be identified through the following examples.

1 is an exploded perspective view of a conventional pipe stopper.

2 is a cross-sectional view of the pipe plug of FIG.

3 is an exploded perspective view of a pipe stopper according to an embodiment of the present invention.

4 is a cross-sectional view of the coupled state of the pipe plug of FIG.

5 shows the pipe together as a perspective view of the pipe stopper.

6 is an exploded perspective view of a pipe stopper according to another embodiment of the present invention.

7 to 8 is an exploded perspective view and a combined cross-sectional view according to another embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

One ; Pipe plug 2; volt

4 ; Extension rubber ring 6; Base member

6a; Rubber ring seating surface 8; Pressure ring

10; Extension spring 12; Sheet

30; Nut P; pipe

L; wrench

The above object, in the pipe plug for blocking the leakage of the fluid by inserting through the end of the pipe by expanding the annular elastic member by the principle of screw and wedge to block the end of the pipe; Expansion rubber ring having a diameter that is inserted into the pipe as an elastic material; A base member having a rubber ring seating surface on which the expansion rubber ring is seated; A pressurizing ring for expanding the pressurized ring by being pressed on the upper surface of the expandable rubber ring; An auxiliary extension ring mounted on the pressure ring upper surface; A sheet having a tapered bottom surface mounted on the upper surface of the auxiliary extension ring; And screwing means for fastening the seat and the base member in a threaded manner so that the expansion rubber ring and the auxiliary expansion ring extend radially in the pipe, wherein the screwing means is fastened or disassembled by a wrench. It is achieved by a pipe plug characterized in that it is of a type.

According to the present invention, the auxiliary expansion ring may be a spring or elastic rubber ring of a circular cross-section, the base member is characterized in that the sanding (sanding) process to prevent the sliding of the expansion rubber ring.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. 3 is an exploded perspective view of a pipe stopper according to an embodiment of the present invention. 4 is a cross-sectional view of the coupling of the pipe plug of FIG. 5 shows a perspective view of a pipe stopper and a state of use thereof.

All the elements shown can be inserted with less play in the pipe P in the engaged state. The expanded rubber ring 4, which is an elastic body, has a circular cross section and preferably has heat resistance, pressure resistance and fire resistance, so fluorine rubber is recommended. Other materials are brass or stainless steel (SUS).

The base member 6 is formed with an annular rubber ring seating surface 6a on which the expansion rubber ring can be seated. A female screw portion 6b is formed in a cylindrical shape in the axial direction. Rubber ring seating surface (6a) is applied to the surface processing to prevent the sliding of the expansion rubber ring (4), according to the present invention is a method of increasing the roughness of the corresponding portion by putting the base member in the sand machine (sand machine) Are employed. According to this, the cost and time for friction surface machining are reduced to a considerable extent.

For reference, the reason for surface-treating the rubber ring seating surface 6a of the base member is to improve the fastening pressure of the pipe plug 1. If the bolt is tightened with a certain force, the expansion rubber ring (4) is forced to rotate with it, and if the limit is exceeded, the bolt and the pipe plug are rotated so that the bolt (2) cannot be tightened with any further force. Because. Therefore, in order to increase the fastening pressure, the friction surface processing of the rubber ring seating portion is essential.

The pressure ring 8 is placed on the expansion rubber ring 4, the taper is formed on the bottom surface (8b) in contact with the expansion rubber ring. As a result, when the pressure ring 8 is applied with force from above, the rubber ring 4 expands in the radial direction by the wedge action.

The upper surface 8a of the pressing ring is flat and the auxiliary extension ring 20 is placed thereon. The auxiliary expansion ring 20 is designed to expand after the expansion rubber ring 4 is expanded to some extent to be in close contact with the inner surface of the pipe. According to the present invention, the auxiliary extension ring may be a spring of a circular cross-section cut in one place.

The seat 12 is mounted on the auxiliary extension ring 20. The bolt is screwed into the base member 6 described above. A taper is formed on the bottom face 12a of the sheet, and a bolt head seating portion 12b is provided on the top face.

Seat 12 is a bolt (2) is fastened to the base member is rotated to penetrate the inside of the auxiliary expansion ring 20 by the wedge action to expand it radially. As described above, the auxiliary expansion ring 20 is expanded after the expansion rubber ring 4 is extended to some extent, which is made possible by adjusting the diameter of the auxiliary expansion ring, the inclination of the bottom taper of the seat, and the like.

One of the main features of the present invention is the use of a wrench, for example an L-shaped hexagonal wrench, as a means for rotating the bolt. To this end, the hexagonal wrench groove 2a of a predetermined depth is formed on the upper surface of the bolt head. The bolt 2 of such a shape is generally molded by one press.

The main reason for using the wrench is to remove the pipe plug 1 of the present invention from the pipe P using the wrench, and there is an additional reason for increasing the torque for rotating the bolt. That is, as shown in Figure 4 when the wrench (L) is inserted into the wrench groove (2a) to lift the end of the lever type, the side pressure acts in the opposite direction of the inner surface of the wrench groove (2a) in the wrench groove, respectively. . Lifting the wrench in this state allows the pipe plug 1 to be pulled out of the pipe.

Another embodiment of the present invention is shown in FIG. 6. 6 is an exploded perspective view of a pipe stopper according to another embodiment of the present invention.

According to this embodiment, the seat 12 and the bolt 2 of the previous embodiment are integrated. That is, the bottom portion 2'a of the head portion of the tapered bolt 2 'is tapered, and the wrench groove 2a is formed on the upper surface 2'b to insert the wrench. According to this embodiment, the wrench groove can be formed deeper, which makes it easier to remove the pipe plug. In addition, since the number of parts is reduced, manufacturing cost and assembly labor are reduced.

According to another embodiment of the present invention, the auxiliary expansion ring 20 is made of a rubber material like the expansion rubber ring (4). Subsequently, surface processing for preventing slip is applied to the upper surface 8a of the pressing ring 8, that is, the surface on which the auxiliary extension ring 20 is seated. In the case where the auxiliary extension ring 20 is made of rubber, a structure composed of the seat 12 and the bolt 2 will be preferable as shown in FIGS.

The pipe stopper of the present invention can be used not only for the mold apparatus but also for other similar apparatuses, and for the purpose of closing various blocks in which holes are formed, not for pipes, that is, in a place where a conventional tap bolt has been used. Can be used.

Another embodiment of the present invention is shown in FIGS. 7 to 8. Fig. 7 is an exploded perspective view, and Fig. 8 is a cross sectional view thereof.

According to the present embodiment, the rubber expansion ring 4 and the auxiliary expansion ring are radially expanded in the pipe by using the principle of screw and wedge as in the above-described embodiment. The difference from the previous embodiment is that the nut 30 is used in place of the bolt, and the threaded rod 32 is formed integrally with the base member 6 '.

The nut 30 may be a hexagon nut that may be fastened by a socket wrench, and may be a circular nut having serrations formed on an outer surface thereof. As shown in FIG. 8, a half of the height of the nut is formed with a wrench groove 30a so that an L-shaped wrench can be used, and the other half has a female screw 30b screwed to the threaded rod 32 of the base member. Formed. According to this embodiment, the user can insert the wrench L more deeply into the nut so that the pipe plug can be more easily removed from the pipe.

According to the pipe stopper of the above configuration, the operation of closing the pipe end or the hole is much easier. When the number of pipes reaches tens, the savings are considerable. In particular, according to the present invention, the friction surface of the base member can be easily processed to reduce the manufacturing cost, and above all, the pipe plug can be easily taken out of the pipe, thereby making it possible to recycle the pipe and the pipe plug sufficiently. In addition, by using a wrench, the pipe can be closed with a higher pressure.

Claims (6)

A pipe stopper for preventing leakage of fluid by inserting through an end of a pipe and then expanding the annular elastic member by the principle of screws and wedges to close the end of the pipe; Expansion rubber ring (4) having a diameter that is inserted into the pipe as an elastic material; A base member 6 having a rubber ring seating surface 6a on which the expansion rubber ring 4 is seated; A pressurizing ring (8) for expanding the pressurized ring by being pressed on the upper surface of the expandable rubber ring (4); An auxiliary extension ring 20 mounted on the pressure ring upper surface; A sheet 12 having a tapered bottom surface 12a mounted on an upper surface of the auxiliary extension ring 20; And screwing means for screwing the seat 12 and the base member 6 in a threaded manner so that the expansion rubber ring and the auxiliary expansion ring extend radially within the pipe. Pipe stopper, characterized in that the type is fastened or disassembled by. The pipe plug according to claim 1, wherein the auxiliary extension ring (20) is one of a stainless steel spring or an elastic rubber ring of one cut section. The pipe stopper according to claim 1, wherein the base member (6) is surface-treated by a sanding machine so that the surface including the expansion rubber ring seating surface (6a) is roughened. The method of claim 1, wherein the screw means comprises: a screw rod (32) protruding integrally from the upper surface of the base member; Half of the height of the pipe plug is characterized in that the wrench groove (30a) is formed so that the wrench can be used and the other half is a nut (30) is formed with a female screw (30b) screwed to the screw rod. 2. The screw assembly according to claim 1, wherein said screw means comprises: a female screw portion (6b) formed along a centerline of said base member; A pipe stopper, characterized in that the bolt (2) to be screwed with the female screw portion in the state on the upper surface of the seat. 2. The screw according to claim 1, wherein the screw means includes: a female screw portion 6b formed along a center line of the base member 6; Pipe stopper, characterized in that the tapered bolt (2 ') is integrally protruding from the bottom of the screw rod fitted from the upper portion of the auxiliary expansion ring (20) and screwed with the female screw (6b).