KR20050032934A - Auxiliary ring for butt welding of resin pipe and butt welding method using thereof - Google Patents

Abstract

An auxiliary ring for butt-welding resin pipes and a method thereof are provided to simplify and hasten the butt-welding work by diversifying diameter of the auxiliary rings in preparation for various diameters of the resin pipes and by preventing one auxiliary ring from being lost through making a bunch of the auxiliary rings as one set. An auxiliary ring(50) for easily butt-welding resin pipes is ring-shaped in a designated width. The auxiliary ring comprises a plurality of grooves(51) formed, larger than a plurality of protrusions installed on outer surface of the resin pipe, on the inner surface of the auxiliary ring to receive all of the plural protrusions and a plurality of protrusions(53) installed on outer surface of the auxiliary ring to promote working convenience. The number of the protrusions is sixteen. The auxiliary ring is made from a metal or a transparent general resin, polypropylene. A plurality of auxiliary rings having various diameters are bundled up as one set.

Description

AUXILIARY RING FOR BUTT WELDING OF RESIN PIPE AND BUTT WELDING METHOD USING THEREOF}

The present invention relates to an auxiliary ring for butt welding of a resin pipe and a butt welding method using the same. More specifically, the present invention relates to an auxiliary ring capable of easily butt welding a resin pipe made of Teflon, which is a fluorine resin, and a butt welding method using the auxiliary ring.

Resin pipes made of Teflon, which are generally made of fluororesin, are suitable for pipings through which high purity chemicals are distributed, such as semiconductor manufacturing equipment.

Currently, Teflon, a fluorine resin, is suitable for piping equipment for distributing high-purity chemicals, that is, for piping equipment of semiconductor manufacturing equipment, chemical and food and beverage manufacturing equipment, and is widely used.

In general, Teflon, which is the aforementioned fluorocarbon resin, has various forms such as PTFE (Poly Tetra Fluore Ethylene), FEP (Flourinated Ethylene Propylene), PFA (Per Fluore Alkoxy), and is chemical, electrical, and mechanically stable. It has been widely used in plumbing equipment in medical fields.

Resin pipes made of Teflon, which is a fluorine resin, are produced with straight pipes, elbows, T-shaped pipes, reducer pipes, unions, adapters, and the like. Plumbing equipment is constructed by cutting and butt welding.

1 to 3, the resin pipe 100 is formed by forming a plurality of projections (11) in the main body 10 of the pipe cylindrical generally, so that these projections (11) during the butt welding The workability of butt welding is improved by fitting. In the resin pipe, the number and size of the protrusions formed on the outer diameter of the pipe may be manufactured differently depending on the manufacturer. For example, although the resin pipe shown in FIG. 1 has 8 protrusions formed in the outer diameter of the pipe, 2 or 4 protrusions may be formed depending on the manufacturer.

Hereinafter, the butt welding method of the conventional resin pipe is briefly described with reference to FIGS. 4A and 4B.

4: A is sectional drawing for demonstrating the butt welding process of the conventional resin pipe, and FIG. 4B is a flowchart for demonstrating the butt welding process of the conventional resin pipe.

The resin pipes of various forms shown in Figs. 1 to 3 are temporarily fixed to the clamps 20a and 20b, respectively (S10).

In the resin pipe temporarily fixed to the clamp, the butt weld surfaces of the pipe face each other by moving the clamps 20a and 20b close to each other. At this time, by aligning the projections formed on the outer peripheral surface of the pipe 10, after visually confirming whether the welded portions of the pipes 10, after correcting the position of the pipe, it is firmly fixed to maintain the state ( S20).

The clamps 20a and 20b are spaced apart from each other (S30), and the hot plate 30 capable of instantaneously applying heat of about 380 ° C or more is inserted between the clamps 20a and 20b. The hot plate is sufficient to apply heat of about 380 ° C. or more instantaneously, and the shape of the hot plate may take the form of a square or a disc (S40).

Then, the clamps 20a and 20b are moved close to each other, and the resin pipes 10 are brought into contact with each other by melting the end portions 13a and 13b of the pipes, that is, the welded portions by about 2 to 3 mm. (S50), the clamp is opened on both sides to remove the hot plate (S60).

next. By moving the clamps 20a and 20b in close proximity to each other and keeping the ends 13a and 13b of the pipes in contact with each other, the butt welding is completed while the ends 13a and 13b of the pipe are cooled.

In the conventional butt welding method of the resin pipe, there is a problem in that precision is reduced and workability is remarkably degraded because the welding part is made to fit with the eye.

In such a conventional welding method of a resin pipe, a problem arises that a distortion or posture deformation occurs in the process of fixing the pipe after matching the welded portions of the resin pipe.

In semiconductor manufacturing facilities, butt welding of pipes requires the distribution of high purity and toxic chemicals, which leads to large accidents.

Therefore, in piping of semiconductor manufacturing equipment, the necessity of resin butt welding must be made very precisely and airtightly.

The present invention has been made in view of the problems of the prior art, and an object of the present invention is to provide an auxiliary ring capable of easily and quickly performing butt welding of a resin pipe according to an embodiment.

Another object of the present invention is to provide a set of auxiliary rings of different diameters so that the auxiliary rings can be quickly adapted to the size of the pipe diameter so that they can be used for butt welding of resin pipes having different diameters.

Still another object of the present invention is to provide the auxiliary ring set in a bundle of auxiliary rings of each diameter so as to easily carry the auxiliary ring set and to prevent loss during operation.

The ring-shaped auxiliary ring having a predetermined width for facilitating the butt welding of the resin pipe according to an embodiment of the present invention is a ring larger than the projection to accommodate all the plurality of protrusions formed in the outer diameter of the resin pipe. A plurality of grooves formed in the inner diameter of the, and

It is characterized by consisting of a plurality of projections formed on the outer diameter of the auxiliary ring in order to facilitate the operation.

Preferably, the grooves are formed in the ring-shaped auxiliary ring having a predetermined width for facilitating the butt welding of the resin pipe according to the embodiment of the present invention.

Preferably, the ring-shaped auxiliary ring having a predetermined width for facilitating butt welding of the resin pipe according to one embodiment of the present invention is made of PP or the like, which is metal or transparent general resin.

The auxiliary ring set for butt welding of the resin pipe according to another embodiment of the present invention is characterized in that a plurality of different inner diameter sizes are provided in a bundle.

Method for butt welding a resin pipe using an auxiliary ring according to another embodiment of the present invention,

Temporarily fixing the resin pipe to the clamp,

Inserting the auxiliary ring into the temporarily fixed resin pipe;

By moving the clamps closer to each other so that the butt welding surfaces of the pipes face each other, and by moving the auxiliary ring fitted to the pipe from side to side, after checking whether the welded portions of the pipes match, after correcting the position of the pipe, Firmly anchored to maintain its state,

Spreading the clamps away from each other,

After removing the auxiliary ring, inserting a hot plate between the open clamps to instantaneously apply heat of about 380 ℃,

Moving the clamps close to each other, and the resin pipes are brought into contact with each other to melt the ends of the pipes, that is, the welded areas;

Spreading the clamps on both sides, removing the hot plate,

And moving the clamps closer to each other to keep both ends of the pipe in contact with each other, thereby cooling and welding the ends of the pipe.

(Example)

Hereinafter, an auxiliary ring for butt welding of a resin pipe of an embodiment of the present invention and a butt welding method using the auxiliary ring will be described in detail with reference to FIGS. 5 to 6.

Figure 5a is a perspective view of the butt welding auxiliary ring of the resin pipe according to one embodiment of the present invention, Figure 5b is a front view of the auxiliary ring, Figure 5c is a side view of the auxiliary ring, Figure 5d has a different diameter A perspective view of the auxiliary ring set.

In FIG. 5A, the butt welding auxiliary ring 50 of the resin pipe may be made of PP or the like, which is metal or transparent general resin, and has an outer ring shape. The auxiliary ring 50 is formed with sixteen grooves 51 in the inner diameter. Forming 16 grooves in the inner diameter of the auxiliary ring 50 is to produce a pipe having a different number of protrusions according to the manufacturer, so that the number of protrusions can be used universally. The size of the groove formed in the inner diameter of the auxiliary ring 50 is generally formed slightly larger than the projection formed in the outer diameter of the pipe to be formed. Because, when the groove formed in the inner diameter of the auxiliary ring becomes smaller or tighter than the protrusion formed in the resin pipe, it may be impossible to work. In this case, the working time becomes longer and the use of the auxiliary ring is rather workable. This is because the result of lowering the weight is obtained. Since the inner diameter of the auxiliary ring is slightly larger than the outer diameter of the pipe, the groove 51 formed in the inner diameter may be adapted to accommodate the protrusion 11 formed in the outer diameter of the pipe 10 to be butt welded.

Protrusion 52 formed on the outer periphery of the auxiliary ring 50 was formed to facilitate the positioning of the groove 51 formed on the inside and rotation of the auxiliary ring.

The width of the auxiliary ring 50 is preferably about 3 to 5 mm in order to precisely match the butt weld portion of the resin pipe, but is not limited to the size of this width.

In Fig. 5D, since the outer diameter of the resin pipe is produced in various sizes from 3/8 "to 2", and is used for plumbing equipment, the inner diameter of the auxiliary ring is 3/8 "to 2" to correspond to the outer diameter of this pipe. Each auxiliary ring of size is provided. Since the auxiliary ring is small in size and can be easily lost during operation, it is preferable that a plurality of auxiliary rings are manufactured in a size corresponding to a pipe used universally and provided as a set of auxiliary ring sets 60. In order to be provided in such a bundle it is provided to the auxiliary ring set 60 by forming an extension 55 in the auxiliary ring and providing a hole in the end of the extension.

The extension 55 of the auxiliary ring includes a number indicating the inner diameter of the auxiliary ring or the outer diameter of the pipe so that the operator can easily identify the size of the auxiliary ring is suitable for improving workability.

Hereinafter, the butt welding method of the resin pipe using the auxiliary ring 50 or the auxiliary ring set 60 as described above will be described in detail. In this description, the same components as in the butt welding method of the conventional resin pipe shown in Fig. 4 are given the same reference numerals.

6A and 6B are cross-sectional views illustrating a butt welding process of a resin pipe using an auxiliary ring according to an embodiment of the present invention, and FIG. 6C is a butt weld of a resin pipe using an auxiliary ring according to an embodiment of the present invention. It is a flowchart for demonstrating a process.

6A to 6C, various types of resin pipes 10 shown in FIGS. 1 to 3 are temporarily fixed to the clamps 20a and 20b (S110). Here, the clamp is sufficient to be able to fix the various types of resin pipe 10, and to be formed in a form that can move in conjunction with each other in the direction of the arrow, it is not limited to the form.

The auxiliary ring 50 is inserted and inserted into the temporarily fixed resin pipe 10 (S111).

The resin pipe temporarily fixed to the clamp moves the clamps 20a and 20b close to each other so that the butt welding surfaces of the pipes face each other. At this time, by moving the auxiliary ring 50 fitted to the pipe 10 to the left and right, after confirming whether the protrusions formed on the outer circumferential surface of the pipe is matched, that is, whether the welding sites of the pipes 10 match, the position of the pipe After correcting, it is firmly fixed to maintain the state (S112). Here, whether the pipes and the protrusions formed on the outer circumferential surface of the pipe coincides with each other, that is, whether the welding portions of the pipes 10 coincide with each other is simply confirmed by moving the auxiliary ring 50 inserted into the pipe 10 from side to side. can do. In addition, after confirming the coincidence of the welded portions of the resin pipes, the two pipes are fixed to the clamps 20a and 20b, respectively, with the auxiliary ring positioned at the welded portions, so that the same as in the conventional welding method for resin pipes. After matching the welding site, the twisting or posture deformation can be easily prevented in the process of fixing the pipe.

Then, the clamps 20a and 20b are spaced apart from each other (S113), and after removing the auxiliary ring 50 (S114), the hot plate 30 that can be instantaneously applied heat of about 380 ° C. It is inserted between the 20a, 20b (S115). The hot plate is sufficient to apply heat of about 380 ° C. or more instantaneously, and the shape of the hot plate may take the form of a square or a disc (S40).

Then, the clamps 20a and 20b are moved close to each other, and the resin pipes 10 are brought into contact with each other by melting the end portions 13a and 13b of the pipes, that is, the welded portions by about 2 to 3 mm. (S116) The clamp is opened on both sides to remove the hot plate (S117).

next. By moving the clamps 20a and 20b in close proximity to each other and keeping the ends 13a and 13b of the pipes in contact with each other, the butt welding is completed while the ends 13a and 13b of the pipes are cooled (S118). ).

In the case of using the auxiliary ring for butt welding of the resin pipe according to the embodiment of the present invention, there is an effect that the resin pipe butt welding can be performed precisely, quickly and easily.

The auxiliary ring set for butt welding of resin pipes according to an embodiment of the present invention can be used for butt welding of resin pipes having different diameters, and the auxiliary ring is defined as It can be quickly adjusted to its size, can be easily carried, and can be prevented from being lost during operation.

The embodiments of the present invention have been described above with reference to the accompanying drawings in order to more clearly describe the present invention, but it should be appreciated that the present invention is not limited to the above-described embodiments and drawings. Those skilled in the art having read the specification of the present invention should appreciate that modifications and variations of the present invention will be very easy, and therefore the scope of the present invention is limited only by the appended claims.

1A is a perspective view showing a resin pipe generally used;

1B is a cross-sectional view of the resin pipe shown in FIG. 1A,

Fig. 1C is a side view of the resin pipe shown in Fig. 1A,

Figure 2a is a perspective view showing an elbow resin pipe,

FIG. 2B is a sectional view of the elbow resin pipe shown in FIG. 2A;

3A is a perspective view showing a T-shaped resin pipe;

3B is a cross-sectional view of the T-shaped resin pipe shown in FIG. 2A;

4A is a cross-sectional view for explaining a butt welding step of a conventional resin pipe.

4B is a flowchart for explaining a butt welding step of a conventional resin pipe;

5A is a perspective view of an auxiliary ring for butt welding of a resin pipe according to one embodiment of the present invention;

5B is a front view of the auxiliary ring shown in FIG. 5A,

Figure 5c is a side view of the auxiliary ring shown in Figure 5a,

5d is a perspective view of an auxiliary ring set having different diameters,

6A and 6B are cross-sectional views illustrating a butt welding process of a resin pipe using an auxiliary ring according to an embodiment of the present invention;

Figure 6c is a flow chart for explaining the butt welding process of the resin pipe using the auxiliary ring according to the embodiment of the present invention shown in Figures 6a and 6b,

<Description of the symbols for the main parts of the drawings>

10 pipe body 11: protrusion

20: clamp 30: hot plate

50: auxiliary ring 51: groove

52: projection 53: hole

54: extension 60: auxiliary ring set

100: resin pipe

Claims (6)

In the ring-shaped auxiliary ring having a predetermined width for facilitating the butt welding of the resin pipe, A plurality of grooves formed in the inner diameter of the ring larger than the protrusions so as to accommodate all the plurality of protrusions formed in the outer diameter of the resin pipe, and A plurality of projections formed on the outer diameter of the auxiliary ring for the convenience of work Butt welding auxiliary ring of the resin pipe, characterized in that consisting of. The auxiliary ring for butt welding of a resin pipe according to claim 1, wherein 16 grooves are formed. The auxiliary ring for butt welding of a resin pipe according to claim 1, wherein the auxiliary ring is made of metal. The auxiliary ring for butt welding of a resin pipe according to claim 1, wherein the auxiliary ring is made of PP which is a transparent general resin. An auxiliary ring set for butt welding of resin pipes, characterized in that the auxiliary ring of claim 1 is provided in a bundle of a plurality of different inner diameter sizes. In the method for butt welding a resin pipe using an auxiliary ring, Temporarily fixing the resin pipe to the clamp, Inserting the auxiliary ring into the temporarily fixed resin pipe; By moving the clamps closer to each other so that the butt welding surfaces of the pipes face each other, and by moving the auxiliary ring fitted to the pipe from side to side, after checking whether the welded portions of the pipes match, after correcting the position of the pipe, Firmly anchored to maintain its state, Spreading the clamps away from each other, After removing the auxiliary ring, inserting a hot plate between the open clamps to instantaneously apply heat of about 380 ℃, Move the clamps closer to each other, the resin pipe to the hot plate to contact each other to melt the end of the pipe, that is, the weld Spreading the clamps on both sides to remove the hot plate, and Moving the clamps closer to each other to keep both ends of the pipe in contact with each other, thereby cooling and welding the ends of the pipe Method for butt welding the resin pipe using an auxiliary ring comprising a.