KR101087687B1 - Joint assembly for pipe - Google Patents

Abstract

The present invention relates to pipe fittings and, more particularly, to pipe fittings that can prevent direct contact between pipes and fittings. In particular, the present invention includes a main body to which the outside of the pipe is fitted so as to be connected to the pipe, a fastening member for coupling the main body and the pipe, and an interposition member interposed between the main body and the pipe; For the purpose of presenting the pipe fittings that the body, the fastening member, the interposition member is formed in an optimal structure.

Pipe, pipe joint, joint, corrosion, battery corrosion, galvanic corrosion, dissimilar metal

Description

Joint assembly for pipe

The present invention relates to pipe fittings and, more particularly, to pipe fittings that can prevent direct contact between pipes and fittings.

In general, pipes are for transporting fluids such as tap water, fire water, and gas, and corrosion prevention management is very important for airtightness, lifespan, maintenance, and hygiene.

However, at the pipe joints, battery corrosion between dissimilar metals (also known as galvanic corrosion) occurs. In addition, existing pipe joints are formed with threads or welds directly to the pipes, thereby causing damage to the pipes, and deteriorating the coating or plating of the pipes. In other words, the above-mentioned battery corrosion and corrosion promoting factors act in combination, so that the corrosion progresses particularly rapidly at the joint part of the pipe, and the cost for maintenance and management is significantly increased.

Therefore, there is an urgent need for a pipe joint scheme that does not generate the above-mentioned battery corrosion and corrosion promoting factors.

The present invention has been made in order to solve the above problems, by preventing direct contact between the pipe and the joint at the pipe joint, the pipe can prevent corrosion by battery corrosion, corrosion promoting factors at the pipe joint Its purpose is to provide a joint.

Another object of the present invention is to provide a pipe fitting that is easy to assemble and excellent in airtightness for a pipe joint.

Still another object of the present invention is to provide a pipe fitting which can prevent corrosion due to battery corrosion, corrosion promoting factors, etc. due to contact between dissimilar metals.

The present invention has been created to achieve the object of the present invention as described above, the present invention includes a main body is fitted with the end of the pipe so that it can be connected to the pipe; A fastening member coupling the main body and the pipe; The pipe end is inserted so as to be interposed between the main body and the fastening member and the pipe to prevent contact with each other, and at least a portion of the outer peripheral surface having a tapered surface having an outer diameter is reduced toward the main body from the pipe; A pipe joint is disclosed.

The tapered surface may be formed by a plane, a curved surface, or a combination of flat and curved surfaces.

The invention also includes a body fitted to the end of the pipe to be connected to the pipe; A fastening member coupling the main body and the pipe; An interposition member for preventing the pipe end from being inserted into and contacting each other so as to be interposed between the main body and the fastening member and the pipe; Disclosed is a pipe fitting including a sealing member interposed between an end surface of the pipe and an inner surface of the interposition member.

The interposition member may include a locking step portion corresponding to the thickness of the end of the pipe, and the sealing member may be interposed between the end of the pipe and an inner surface of the locking step portion of the interposition member.

The present invention also includes a main body fitted with an end of the pipe to be connected to the pipe, having a flow passage connected to the inside of the pipe, and at least a portion of the inner surface of the flow passage coated with a synthetic resin; A fastening member coupling the main body and the pipe; Disclosed is a pipe fitting including an interposing member for preventing the pipe end from being inserted into the main body and the fastening member and the pipe to be in contact with each other.

The main body may have a stepped inner circumferential surface of a portion into which the end of the pipe is inserted to support the end of the pipe, and the coating portion may be formed inward from the stepped portion.

The present invention also includes a body to which the end of the pipe is fitted so as to be connected with the pipe; A fastening member coupling the main body and the pipe; An interposition member which prevents the pipe ends from being inserted into and interposed between the main body and the fastening member and the pipe; And a sealing member interposed between the end surface of the pipe and the inner surface of the interposition member, wherein at least a portion of the inner circumferential surface of the main body may be tapered to be in close contact with the interposition member when engaging the fastening member.

The interposition member may have a tapered surface to be in surface contact with the tapered inner circumferential surface of the main body.

The main body has a stepped portion formed such that an inner circumferential surface of the portion into which the end of the pipe is inserted is stepped to support the end of the pipe, and the tapered portion of the main body faces the step of the main body toward the outside of the main body. It can be formed between the ends of the body.

The main body may be formed with a locking step corresponding to the thickness of the end of the pipe. The main body may be coated with at least a portion of a synthetic resin on the inner peripheral surface of the flow path connected to the inside of the pipe.

At least a portion of the inner circumferential surface of the main body may be tapered to be pressed against the edge of the interposition member when engaging the fastening member.

The body and the tube may be formed of different metal materials. The main body and the fastening member may be screwed.

The fastening member may be fitted to the outside of the pipe, and may have a main body fastening portion so that the end of the main body may be inserted into and fastened.

The interposition member may be configured to increase an outer diameter while going from the end of the pipe side toward the main body so that the fastening member may be in close contact with the interposition member and locked from the pipe toward the main body.

The interposition member may be formed of a synthetic resin material.

Meanwhile, the main body may include any one of a connector, a ball valve, a faucet, and a cap, and the main body may have a malleable cast iron material in the case of a connector or a cap.

The pipe fitting according to the present invention prevents direct contact between the main body, the fastening member, and the pipe by the interposition member, thereby preventing battery corrosion and corrosion promoting factors, thereby increasing the service life of the pipe and the pipe fitting, and improving maintenance. There is an advantage that easy, airtightness can be maintained, and hygiene problems due to corrosion residues can be prevented.

In addition, the pipe fitting according to the present invention has a structure that can prevent the corrosion between dissimilar metals, it is possible to use inexpensive malleable cast iron, such as stainless steel and brass resistant to corrosion can reduce the construction cost, improve construction There is an advantage that can be.

In addition, the pipe fitting according to the present invention has an advantage that the pipe can be firmly joined (improved tensile force between pipe shafts) by fastening the main body and the fastening member, so that the pipe joint rigidity is excellent and airtightness can be maintained.

In addition, the pipe fitting according to the present invention is formed by the tapered surface of the interposition member to reduce the outer diameter toward the main body, it is easy to fasten the main body and the fastening member to improve the workability and airtightness, the main body can be separated, the maintenance, There is an advantage that it is easy to repair.

In addition, the pipe joint according to the present invention can further absorb the expansion and contraction of the pipe due to the temperature difference by additionally interposing the sealing member between the interposition member and the pipe, and the gap between the interposition member and the pipe is reliably sealed by the sealing member. It can be, there is an advantage that the airtightness is excellent.

In addition, the pipe fitting according to the present invention can be prevented from corrosion and battery corrosion by coating the flow path of the main body with a synthetic resin material, and use a cheap material such as malleable cast iron as the material of the main body, such as stainless steel or brass used as water supply fittings There is an advantage to this.

In addition, the pipe fitting according to the present invention is tapered so that the inner circumferential surface of the main body can be compressed to the edge of the interposition member during assembly, so that the gap between the main body and the interposition member can be more reliably sealed, thereby providing excellent airtightness.

Hereinafter, a pipe fitting according to the present invention will be described in detail with reference to the accompanying drawings.

1 is an exploded perspective view of a pipe fitting according to a first embodiment of the present invention, Figure 2 is a cross-sectional view of the assembled state of the pipe fitting according to the first embodiment of the present invention.

As shown, the pipe fitting according to the first embodiment of the present invention is the main body 10 to which the end of the pipe 2 is fitted so as to be connected to the pipe 2, and the outside of the pipe 2 The fastening member 20 which is fitted and coupled to the main body 10 to couple the main body 10 and the pipe 2 is interposed between the main body 10 and the fastening member 20 to be in contact with each other. It is configured to include an interposition member 30 is inserted into the end of the pipe (2) to prevent that.

The pipe (2) is formed of a suitable material according to the purpose of installation, for example, when used as a water pipe (2) may be formed of galvanized steel pipe (2), copper pipe, stainless steel pipe and the like.

The main body 10 is a connector (or coupler) for connecting the pipe 2 with another pipe 2 as in the present embodiment, as another example, a valve capable of intermitting a fluid flow, As another example, a cap or the like for blocking the pipe 2 may be used. As the main body 10 of the connector structure, the main body 10 as in the present embodiment has a '-' shaped sleeve, and in other embodiments, a 'T' shaped tee, elbow, and diffuser. (diffuser), reducer (reducer). When the main body 10 is a valve, there are a general ball valve (see FIG. 7), a faucet, and the like.

The body 10 may have a flow path 12 to allow the flow of fluid in a structure other than the cap. In addition, when the main body 10 has a plurality of parts connected to the pipe, such as a connector, as shown in FIG.

The body 10 may be formed of the same material as the pipe 2 or different materials. Alternatively, since the main body 10 is indirectly contacted with the pipe 2, even if the material is different from the pipe 2, the main body 10 can be used without worrying about corrosion of the body, and in particular, the main body 10 may be formed of malleable cast iron having a low cost and good durability. .

In the main body 10, it is more preferable that the inner circumferential surface of the pipe 2 side end is stepped so that the main body 10 may be caught by the pipe 2 in any structure. That is, the stepped portion 14 of the main body 10 serves as a stopper when the main body 10 is assembled, so that the main body 10 can be easily coupled to the pipe 2 at the correct position. As a result, the bonding force between the main body 10 and the pipe 2 is excellent. In addition, the stepped portion 14 of the main body 10 is in close contact with the end surface of the pipe 2, so that the stepped portion 14 of the main body 10 of the main body 10 and the pipe 2 Since the airtightness can be maintained, it is excellent in airtightness, and the coupling area of the main body 10 and the pipe 2 can be secured widely, and the bonding force is excellent.

Here, when the interposition member 30 includes the locking step portion 36 as described below, more precisely, the stepped portion 14 of the main body 10 is the locking step portion 36 of the interposition member 30. ), It may be caught by the pipe (2).

When the flow path 12 of the main body 10 is formed of a different material from the pipe 2, at least a part of the flow path 12 is coated with a synthetic resin material to prevent battery corrosion due to contact between dissimilar metals. It is more preferable to form.

More preferably, direct contact with the pipe 2 is prevented by the interposition member 30 from the step portion 14 to the end of the pipe 2 side of the flow passage 12 of the main body 10. In addition, the coating part 16 may be formed from the step portion 14 of the flow path 12 of the main body 10 to the opposite side of the pipe 2. More preferably, the synthetic resin material for the coating part 16 may be polyethylene (P.E).

At least a portion of the inner circumferential surface of the main body 10 is tapered to form a tapered portion 18 to be in close contact with the interposition member 30, thereby firmly in close contact with the main body 10 and the interposition member 30. Can be sealed.

Since the tapered portion 18 of the main body 10 only needs to be in close contact with the interposition member 30, the stepped portion 14 of the main body 10 and the main body 10 are directed toward the outside of the main body 10. More preferably, at least a portion is formed between the ends of the.

When the tapered portion 18 is formed in the main body 10 as described above, since the interposition member 30 is pressed against the tapered portion 18 of the main body in the process of coupling with the fastening member 20, it is more firmly sealed.

On the other hand, the main body 10 may be fastened by various fastening methods such as the fastening member 20, press-fitting, welding, flange coupling, in particular in the case of pipe fittings of the present invention that the screw fastening with the fastening member 20 desirable. That is, a screw portion 19 may be formed on the inner surface of the pipe 2 side end of the main body 10 so as to be screwed to the fastening member 20.

In addition, the main body 10 is the main body 10 and the fastening member 20 without being easily released from the main body 10 and the fastening member 20 during maintenance and repair when the screw portion 19 is corroded. ) Cannot be reused. Therefore, the main body 10 is more preferably formed so that the threaded portion 19, which is a fastening portion with the fastening member 20, is treated with a dark blue (geometry) plating to prevent corrosion.

More preferably, the fastening member 20 takes a structure separated from the pipe 2. That is, since the fastening member 20 is rotatable or movable along the pipe 2, the pipe fitting of the present invention can be easily assembled, and the fastening member 20 and the main body 10 are in close contact with each other. The fastening force of the fastening member 20 and the main body 10 can be fastened.

The fastening member 20 may be directly coupled to the pipe 2. Alternatively, the fastening member 20 should be made of the same material as the main body 10 as in this embodiment so that the pipe 2 may not be damaged, battery corrosion promoting factors, and the like. In consideration of the malleable cast iron can be formed of a different material than the pipe (2), it can be indirectly coupled to the pipe (2).

In particular, the fastening member 20 is formed so that the interposition member 30 is also interposed between the fastening member 20 and the pipe 2, it can be indirectly coupled to the pipe (2).

The fastening member 20 may be coupled to the interposition member 30 in various ways, and may be coupled to the interposition member 30 by being in close contact with the interposition member 30 as in the present embodiment. At this time, the outer peripheral surface of the interposition member 30, more precisely, as will be described later, taper, that is, the outer diameter toward the outer side toward the main body 10 toward the main body 10 toward the end from the end of the pipe (2) side It can be formed to increase.

Therefore, since the fastening member 20 is moved from the pipe 2 toward the main body 10 to be in close contact with the outside of the interposition member 30, the screw 2 as described later, the screw fastening, The fastening member 20 can be easily coupled and fixed to the interposition member 30 without a separate joining operation such as welding, and the interposition member 30 can be easily assembled to the outside of the pipe 2. Can be.

In addition, the fastening member 20 has a main body fastening portion 22 so that the main body 10 is inserted and fastened. As described above, the main body fastening portion 22 may be formed with a screw portion 22A to be screwed with the main body 10. It is preferable that the fastening member 20 is also plated at least with the threaded portion 22A, such as the threaded portion 19 of the body 10 described above.

The interposition member 30 is interposed between the first intervening portion 32 interposed between the pipe 2 and the main body 10 and between the pipe 2 and the fastening member 20 as described above. It may be configured to include a second interposition portion 34 connected to the first interposition portion 32 to be. At this time, the first interposition portion 32 and the second interposition portion 34 may be integrally formed or connected to each other by a connecting portion as in the present embodiment.

The first interposition portion 32 and the second interposition portion 34 may be formed separately from each other, but more preferably formed integrally for airtightness.

In particular, the second interposition portion 34 may have a tapered surface having an outer diameter reduced as at least a portion of the outer circumferential surface thereof goes from the pipe 2 to the main body 10.

As described above, when the interposition member 30 reduces the outer diameter of the main body 10, the interposition member 30 may be more easily inserted into the main body 10, thereby providing excellent assembly. In addition, since the assembly of the main body 10 is easy as described above, the second interposition portion 34 may be prevented from being pushed and deformed by the main body 10 in the assembling direction of the main body 10. The airtightness may be maintained and the main body 10 and the fastening member 20 may be firmly fastened.

In addition, when the interposition member 30 reduces the outer diameter toward the main body 10, the area in contact with the main body 10 increases, thereby improving airtightness.

On the other hand, more preferably, the second interposition portion 34 may be formed such that at least the end portion of the main body 10 is tapered as described above.

In addition, the tapered surface of the second interposition portion 34 may be formed in a plane, a curved surface or a combination of a flat surface and a curved surface.

In addition, the interposition member 30 may further include a locking jaw portion 36 in close contact with the end surface of the pipe 2. Therefore, the locking jaw portion 36 of the interposition member 30 serves as a stopper when the interposition member 30 is assembled, so that the interposition member 30 can be assembled to the pipe 2 accurately and easily. .

The interposition member 30 is preferably formed of a stretchable material to be in close contact with the pipe 2 and the fastening member 20 and the main body 10 for airtightness. In addition, the interposition member 30 is the fastening member 20 or the main body 10 so that corrosion does not occur, such as battery corrosion even if the fastening member 20 or the main body 10 is a different material than the pipe (2). ) Is more preferably formed of a material that can insulate the pipe (2).

Therefore, the interposition member 30 is preferably formed of a polyamide (nylon 6.6) material to have all the durability, elasticity and insulation. For reference, polyamide is a hygienic engine-neutral resin recognized by Japan Ministry of Health, Food and Welfare, and has excellent heat resistance, vibration resistance, and tensile strength.

On the other hand, between the interposition member 30 and the pipe (2) absorbs the expansion and contraction of the pipe (thermal expansion or contraction) due to the temperature change, the leakage caused by the gap between the interposition member 30 and the pipe (2) more At least one sealing member 40 may be interposed to reliably prevent and further increase airtightness.

The sealing member 40 may be interposed anywhere if it can be interposed between the interposition member 30 and the pipe 2. In particular, the interposition member 30 has a locking jaw portion 36 corresponding to the thickness of the end of the pipe 2, and the sealing member 40 has an end surface of the locking jaw portion 36 and the pipe 2. By being interposed therebetween, the assembly of the interposition member 30 can be further facilitated, and the assemblability of the sealing member 40 is excellent.

In addition, as described above, the interference between the interposition member 30 and the sealing member 40 is prevented, thereby preventing the sealing member 40 from being pushed by the interposition member 30 when the interposition member 30 is assembled. Since it can be, the separation of the sealing member 40 is prevented is excellent in the assembly of the sealing member 40.

The sealing member 40 is preferably formed in an O-ring structure to seal the entire circumference of the pipe (2).

The sealing member 40 may be any material as long as it can maintain the elastic expansion and airtightness of the pipe. However, the sealing member 40 may be formed of silicone rubber as an example in view of durability.

Looking at the assembly process of the pipe fitting according to the present invention configured as described above with reference to Figures 3 to 6, as follows.

First, as shown in FIG. 3, the fastening member 20 is fitted to the outside of the pipe 2. At this time, the fastening member 20 is in a state capable of moving along the pipe 2.

Next, as shown in FIG. 4, the interposition member 30 is fitted to the outside of the pipe 2 so that the interposition member 30 is in close contact with the pipe 2. At this time, to facilitate the assembly of the interposition member 30, the fastening member 20 fitted to the pipe 2 is preferably backed from the position.

In addition, when the interposition member 30 is assembled to the pipe 2, the seal member 40 may be interposed between the interposition member 30 and the pipe 2. It is also preferred to be assembled together.

Next, as shown in FIG. 5, the main body 10 is fitted to the pipe 2. At this time, the tapered portion 18 of the main body 10 is in surface contact with the interposition member 30, more precisely, the second interposition portion 34, whereby the main body 10 and the interposition member 30 closely contact each other. Can be.

Next, as shown in FIG. 6, the fastening member 20 fitted to the pipe 2 is rotated to fasten the fastening member 20 and the main body 10, and the fastening member 20. It is fixed in close contact with the interposition member 30. At this time, as the main body 10 and the fastening member 20 are fastened, the main body 10 may be in close contact with the interposition member 30.

It is more preferable to use a tool so that the fastening member 20 and the main body 10 can be firmly coupled. In this case, there is no need to prepare a special tool, and a general tool such as a monkey spanner can be used.

On the other hand, when the main body 10 and the fastening member 20 is fastened in this embodiment, the fastening member 20 is rotated and the main body 10 is fixed, and as another embodiment the main body According to the structure of 10, the fastening member 20 may be fixed and the main body 10 may be rotated or moved, or the fastening member 20 and the main body 10 may be rotated or moved together.

Such pipe fittings of the present invention are excellent in corrosion resistance, durability, hygiene, airtightness, economical efficiency, and the like, and are suitable for drinking water pipes 2, fire pipes 2, gas pipes 2, and the like.

Meanwhile, a flow path in which a fluid such as water flows is formed in the main body 10, and parts forming the flow path may communicate with the pipes, thereby causing galvanic corrosion between dissimilar metals. Therefore, there is a need for means for preventing corrosion of the passage portion in communication with the pipe in the body 10.

Figure 8 is a block diagram showing the injection fusion coating process of the pipe fittings according to the present invention.

As shown in FIG. 8, the pipe fitting according to the present invention may form the coating part of the main body 10 by various methods, and in particular, by the injection fusion coating method by the coating apparatus 100 as follows. More preferably.

The injection fusion coating apparatus 100 is inserted into the main body 10 so as to form a space (hereinafter, referred to as a 'coating forming space') 10A in which the coating portion may be formed. Can be formed. That is, the coating apparatus 100 is formed so that the core portion 102 inserted into the main body 10 may fill the rest except the coating forming space 10A. At this time, the core portion 102 of the coating device 100 may be formed to correspond to the entire interior of the body (10). Alternatively, as illustrated, the inside of the main body 10 may be coated by a plurality of coating devices 100 for ease of coating.

In the core portion 102 of the coating apparatus 100, the coating liquid may be filled with the coating liquid 10A so as to form the coating portion by forming a coating liquid for forming the coating portion. At least one flow passage 104 is formed to guide 10A.

Therefore, first, the core portion 102 of the coating apparatus 100 is inserted into the body 10 before the coating portion is formed to form the coating forming space 10A, and then the coating apparatus 100 is formed. When the coating solution is supplied through the flow path 104, the coating solution is filled in the coating formation space 10A. After the coating liquid is filled in the coating forming space 10A, wait until the coating liquid filled in the coating forming space 10A is cured, and then removing the coating apparatus 100, the coating part on the main body 100. This can be formed. For reference, the main body 10 shown in FIG. 8 has a tee structure.

As described above is only a pipe as a part of a preferred embodiment that can be implemented by the present invention, the scope of the present invention, as is well known is not limited to the above embodiment should not be interpreted, the present invention described above All of the technical ideas together with the technical idea of the base will be included in the scope of the present invention.

1 is an exploded perspective view of a pipe fitting according to a first embodiment of the present invention.

2 is a cross-sectional view of an assembled state of the pipe fitting according to the first embodiment of the present invention.

3 to 6 are diagrams sequentially showing the assembling process of the pipe fitting according to the first embodiment of the present invention.

7 is a sectional view of a pipe fitting according to a second embodiment of the present invention.

Figure 8 is a block diagram showing the injection fusion coating process of the pipe fittings according to the present invention.

<Explanation of symbols on main parts of the drawings>

2; Pipe 10; main body

12; Euro 14; Step

16; Coating part 18; Taper part

20; Fastening member 22; Body fastening part

30; Interposition member 32; First Intervention Department

34; Second intervening portion 36; Hanging jaw

40; Sealing member

Claims (16)

A main body fitted with an end of a metal pipe, having a flow path connected to the inside of the pipe, and having a metal material different from that of the pipe; A fastening member screwed with a threaded portion formed on an outer circumferential surface of the main body to couple the main body to the pipe and having the same material as the main body; An interposition member of an insulating material interposed between the inner circumferential surface of the main body and the outer circumferential surface of the pipe to prevent the main body and the fastening member from contacting each other, and having a locking step in close contact with the end surface of the pipe; A sealing member interposed between the end of the pipe and the locking jaw portion of the interposition member, The interposition member may include a first intervening portion interposed between the outer circumferential surface of the pipe and the inner circumferential surface of the fastening member, and a second interposition formed integrally with the first interposing portion and interposed between the outer circumferential surface of the pipe and the inner circumferential surface of the main body. Includes wealth, The first interposition portion is tapered to increase an outer diameter toward the main body from the pipe, so that the fastening member presses the interposition member toward the outer circumferential surface of the pipe when the fastening member is screwed with the main body. The second interposition portion is tapered to reduce the outer diameter toward the main body from the pipe, so that the main body presses the interposition member toward the outer peripheral surface of the pipe when the fastening member is screwed with the main body, The inner circumferential surface of the main body has a taper having an inner diameter that decreases from the pipe toward the main body so as to be in close contact with the second interposition of the interposition member when the interposition member is coupled to the pipe by the fastening member. , The main body is formed with a stepped portion to be in close contact with the engaging jaw portion of the interposition member, The fastening member has a taper in which an inner diameter increases from the pipe toward the main body so as to press the interposition member to the outer circumferential surface of the pipe when the interlocking member is screwed to the main body with the interposition member interposed therebetween. Pipe fittings. delete delete The method according to claim 1, The main body is a pipe fitting, characterized in that the inner surface of the flow path is coated with a synthetic resin. delete delete delete delete delete delete delete delete delete delete The method according to claim 1 or 4, Pipe body characterized in that the main body has a malleable cast iron material. The method according to claim 1 or 4, The main body is a pipe fitting, characterized in that any one of a connector, a ball valve, a faucet, a cap.

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