KR101110674B1 - Pipe coupling system for smooth pipe of inner part - Google Patents

Abstract

PURPOSE: A pipe connection system for inner smooth pipes is provided to ensure durability of binding of strip bands against shear stress caused by differential settlement. CONSTITUTION: A pipe connection system for inner smooth pipes comprises a sleeve(12a), strip bands(20a), and stoppers(18a). An annular protrusion(14a) is formed along the periphery of the middle portion of the sleeve and restricts the depth of the sleeve inserted into an inner smooth pipe. The strip bands are coupled together from the top and bottom of the inner smooth pipe while covering the exterior of the inner smooth pipe. The stoppers are fixed to the exterior of an end of the inner smooth pipe and presses ends of inner smooth pipes against the annular protrusion by the binding force of the strip bands in the longitudinal direction of the inner smooth pipes.

Description

PIPE COUPLING SYSTEM FOR SMOOTH PIPE OF INNER PART}

The present invention relates to a pipe connection system for an internal smooth pipe, and more particularly, to an internal smooth pipe for connection and installation relation of pipes having a smooth internal shape among pipe types to be connected to form a drainage pipe for sewage or sewage. It is about a connection system.

In general, the sewage and sewage discharged from each home or factory is discharged through the sewage pipes of each home or factory, and is induced and discharged to a sewage and sewage treatment plant provided in a specific area through a relatively large drainage pipe buried underground.

The above-mentioned drainage pipe diameter is about 1m, and the length of unit pipes interconnected to form the drainage pipe is generally about 4m to 10m, and the material is made of synthetic resin material and steel material for securing durability according to the weight reduction. Is mainly used.

Among the shapes of the pipe for forming such a drainage pipe, there is a corrugated pipe in which the side wall shape constituting the pipe protrudes in the circumferential direction of the pipe and the concave part is repeatedly formed along the longitudinal direction of the pipe, or in the circumferential direction and the longitudinal direction of the pipe. There is also a spiral tube in which the protruding or concave portions in a spiral shape are continuous.

Here, in the connection of the pipes for forming the drainage passage, the internal shape relates to the connection system of pipes for interconnecting the steel pipes smooth from one end to the other end.

As described above, the inner smooth tube is a smooth tube having an inner wall shape that forms a tube from one end to the other end, and a conventional technique for connecting such smooth tube is to recorrugated the end of the smooth tube, and Fastening with an annular band has been mainly used.

However, there was a problem that the tightening force of the re-bone shaping portion is not uniform, and the perfect fixation is not maintained during workability and uneven sedimentation.

In order to improve this, research and efforts have been continued to interconnect neighboring smooth tubes without separately forming the ends of the smooth tubes, and as an example, Korean Utility Model Publication No. 20-2000-0005126 (" Pipe coupling ": hereinafter referred to as" prior art 1 ") and Japanese Laid-Open Publication No. JP P2008-215622 (" tubular connector ": hereinafter referred to as" prior art 2 ") have been disclosed.

Prior art 1 has a rubber packing having a separating jaw restricting the insertion position of the pipe in the center position of the inner wall in the shape of a sleeve, and after the pipe is inserted from both sides of the rubber packing, tighten the band on the outside of the rubber packing (sealed) ).

However, the prior art 1 has a problem in that the rubber packing is easily damaged or broken in response to an uneven settlement or an extension or contraction action of the pipe because the configuration of interconnecting the pipes is made of rubber packing.

In addition, the prior art 2 is to cover the outer surface of the pipes in contact with each other with a sleeve made of an elastic material, and to tighten the upper side in a form of wrapping a band of a steel plate of a large area to maintain the watertight.

However, the prior art 2 is also configured to wrap the outside of the pipes in contact with each other with a sleeve made of elastic material, and then tighten it with a band made of steel sheet, so that the extension or contraction of the pipe is repeated and breakage of the sleeve portion not covered by the band. Have concerns.

Republic of Korea Open Utility Model Publication No. 20-2000-0005126 Japanese public publication number JP P2008-215622

The present invention has been made to solve the problems of the prior art, including the prior art, as well as to ensure that the connection site is not separated, damaged or broken against the action in the direction of stretching or contracting the pipe, including unequal settlement. The present invention provides a pipe connecting system for internal smooth pipes, which enables quick and easy connection between them in a narrow space.

Characteristic configuration of the pipe connection system for the inner smooth pipe according to the present invention for achieving the above object is fitted into the inner smooth pipe 10 by the annular projections 14a, 14b, 14c protruding along the outer wall center portion. Sleeves 12a, 12b, 12c, 12d of limited depth; They form a half arc shape, and mutually press fastening is formed in a shape surrounding each of the outer walls at the upper and lower sides with respect to the inner smooth tube 10, and a through hole in the longitudinal direction of the inner smooth tube 10 is formed on the side wall. Band bands 20a, 20b having fastening brackets 22a, 22b, 22c, and 22d having; And a position in which the engagement positions of the band bands 20a, 20b, and 20c are offset from the ends of the sleeves 12a, 12b, 12c, and 12d based on the annular protrusions 14a, 14b, and 14c. Stoppers 18a and 18b fixedly installed at the ends of the inner smooth tube 10 so as to be limited to each other, and the band bands 20a, 20b, and 20c are formed in the sleeves 12a, 12b, 12c, and 12d. ) Are mutually press-fitted through the fastening brackets 22a, 22b, 22c, and 22d, respectively, so as to be in the interval between.

In addition, the surface of the annular projection (14a, 14b, 14c) facing the end of the inner smooth tube 10 is pressed by an elastic material to maintain the airtight gasket (16a, 16b, 16c, 16d, 16e) The gaskets 16a, 16b, 16c, 16d, and 16e integrally cover the entire surface of the annular protrusion 14a, and are provided on both sides of the annular protrusion 14a. It may be manufactured as a ring-shaped thing 16b facing each other and covering.

Then, the sleeve is made of the gasket material having flexibility, elasticity and tensile strength (12b), and the shape protruded so that the annular projection 14b of steel material is fitted from the outside to the center portion of the outer wall It may be made of 16c.

In addition, the sleeve 12c is configured to have a flat outer wall, and has an annular band shape to perform the function of the annular protrusion 14c and the gasket 16d along the central portion of the longitudinal outer wall of the sleeve 12c. The sleeve 12d is made of the gasket material having flexibility, elasticity and tensile strength, and is formed of the gasket material having the flexibility, elasticity and tensile strength, and the annular protrusion 14d and the gasket are formed at the central portion of the longitudinal outer wall. (16e) It may be formed in a configuration in which a protrusion that simultaneously performs a function is formed integrally.

As described above, according to the configuration of the present invention, the sleeve is placed at the center between the two smooth tubes for interconnection by annular projections, and the band band is press-fixed to the inner smooth tube sidewall by the stopper, and then the inner smoothness. In the process of pressure tightening to narrow the band band through the fastening bracket in the longitudinal direction of the pipe, both ends of the inner smooth pipe are sealed to press the gasket provided in the annular protrusion to effectively prevent the risk of water leakage. It is economical because it omits the process such as remodeling for the end portion.

In addition, the coupling of the band band through the sleeve, the stopper and the fastening tool provides sufficient durability in response to the shear stress caused by the uneven settlement between the inner smooth pipes, and in the longitudinal direction of the smooth pipe between the sleeves. Fastening between the bands that are fastened to each other has an advantage of effectively preventing damage to or damage to the connection part by sufficiently maintaining the connection state in response to the elongation or contraction action of the internal smooth tube including the cause of the unequal settlement. .

1 is a partial cross-sectional exploded perspective view for explaining the configuration of the pipe connection system for the internal smooth pipe according to the present invention and the coupling relationship of these configurations.
2 is a drawing substitute photograph showing an example of an internal smooth tube.
3 is a perspective view illustrating a stopper that may be applied to an inner smooth tube having a protrusion of FIG. 2.
4 is an exploded cross-sectional view illustrating an arrangement relationship and a coupling relationship of the pipe connection system configuration of FIG. 1.
FIG. 5 is a partial cutaway side view illustrating the mutual coupling state from the configuration of FIG. 4. FIG.
6A to 6D are partially enlarged cross-sectional views for explaining modifications of the respective configurations of the mutual fastening portions indicated by arrows IV in FIG. 5.
5 is a perspective view showing a preferred embodiment of the band band including a fastening bracket.
FIG. 6 is a cross-sectional view for describing an arrangement relationship between the configurations based on the arrow VI in FIG. 3.
7 is a perspective view showing another modified example of the band band.
FIG. 8 is a cross-sectional view of the arrow VI of FIG. 4.

Hereinafter, a pipe connecting system for an internal smooth pipe according to an embodiment of the present invention will be described with reference to the accompanying drawings.

As shown in FIGS. 1 to 8, the pipe connecting system for the internal smooth pipe according to the present invention has a single tube-shaped sleeve having a predetermined diameter such that an inner surface thereof is inserted through an end of the smooth internal smooth pipe 10. 12a, 12b, 12c, 12d).

The materials of the sleeves 12a, 12b, 12c, and 12d are those of galvanized steel sheets or the same moisture-coated steel sheets or synthetic resins which are coated to prevent corrosion and at the same time ensure sufficient durability from external physical forces.

The outer sidewalls of the sleeves 12a, 12b, 12c, 12d are formed with annular protrusions 14a, 14b, 14c, 14d having a constant thickness and width along the circumferential direction at the center position in the tube forming direction.

These annular projections 14a, 14b, 14c, 14d limit the depth at which one end of the sleeves 12a, 12b, 12c, 12d is inserted into the inner smooth tube 10, thereby the sleeves 12a, 12b, 12c. , 12d) is placed in the center position between the two smooth pipes 10 which are connected next to each other.

In addition, the annular projections 14a, 14b, 14c, and 14d have sleeves 12a, 12b, 12c, and 12d respectively inserted into both smooth pipes 10, so that the outer edge portion thereof is the outer side of the smooth pipe 10. It needs to be formed to protrude a predetermined interval more than the peripheral portion.

The annular projections 14a shown in FIGS. 1 to 6A of the annular protrusions 14a, 14b, and 14c are integrally formed with the sleeve 12a or formed by casting or the like during the formation of the sleeve 12a. It can consist of welding the ring-shaped annular projection 14a shape with respect to the side wall of 12a.

Meanwhile, the configurations of the sleeves 12b and 12d shown in FIGS. 6B and 6D are made of rubber or a synthetic resin material having flexibility, elasticity and tensile strength, and the centers of the sleeves 12b and 12d in the pipe forming direction. The site consists of one or more annular protrusions 14b and 14d formed integrally at regular intervals.

Furthermore, the configuration shown in FIG. 6B is formed by forming two annular projections 14b at regular intervals along the circumference of the side wall of the sleeve 12b, and these annular projections 14b will be described later, but the inner smooth tube 10 The function of the gasket 16c is parallel to the end.

In addition, between the annular protrusions 14b, a reinforcing material R made of steel may be further inserted to compensate for the durability of the annular protrusion 14b made of a synthetic resin material.

In addition, the configuration shown in Figure 6c, the outer wall of the sleeve (12c) of the steel material, the annular projection (14c) of a synthetic resin material having a flexible elastic force and tensile strength and a certain level of durability along the circumference of the center portion of the tube forming direction It is attached or fixed by the usual method.

The annular projection 14c is preferably configured to perform the gasket 16d function to be described later as it is made of a synthetic resin material, as described in Figure 6b.

In addition, the outer sidewall of the annular projection 14a opposite to the end of the inner smooth tube 10, that is, both sidewalls perpendicular to the pipe forming direction of the sleeves 12a and 12c, as shown in Figs. 1 to 6a, Gaskets 16a and 16b made of elastic material are placed to increase airtightness between the ends of the smooth tube 10.

As shown in the cross-sectional shapes shown in Figs. 1 to 5 of the types of the gaskets 16a and 16b, the grooves into which the annular projections 14a are fitted to the inner side to integrally cover the entire portion of the outer side of the annular projections 14a. It may be manufactured in a ring shape having, or may be manufactured in a ring shape having a predetermined width and thickness corresponding to both sidewalls of the annular protrusion 14a, such as the gasket 16b shown in FIG. 6A.

And the gasket structure shown to FIG. 6B-FIG. 6D is made as a structure parallel to the function of the annular protrusion 14b, 14c, 14d as mentioned above.

Here, the above-mentioned annular projections 14a, 14b, 14c, 14d and gaskets 16a, 16b, 16c, and 16d are provided between the two inner smooth tubes 10 whose sleeves 12a, 12b, 12c, and 12d are interconnected. In the state fitted in the projected to the outside of the smooth tube (10).

The degree of protrusion of the annular protrusions 14a, 14b, 14c, and 14d and the gaskets 16a, 16b, 16c, and 16d is similar to those of the band bands 20a, 20b, and 20c described later with respect to the longitudinal direction of the inner smooth tube 10. It must be made within the range not to interfere with the installation of the bolts B1 to be mutually fastened.

On the other hand, as shown in FIGS. 1 to 8, the end positions of the inner smooth pipes 10 guide the mounting positions of the band bands 20a, 20b, and 20c to be described later, and these band bands 20a, 20b, and 20c. The end bands of the inner smooth tube 10 can be brought into close contact with the surface of the annular projections 14b, 14c, and 14d or the gaskets 16a, 16b, 16c, and 16d through the fastening of the bands 20a and 20b. Stoppers 18a and 18b serving as locking jaws of the 20c are welded.

As shown in FIG. 2, the stopper 18a shown in FIGS. 1 to 6C among the structures of the stoppers 18a and 18b is formed when the protrusion 10a is formed on the outer wall of the inner smooth tube 10. When fastening the band bands 20a, 20b, and 20c, they have a height d 'equal to the protruding height d " of the protruding portion 10a to prevent the pressure from being concentrated on the protruding portion 10a. The bending part D is formed.

The length of the bending portion D of the stopper 18a described above is preferably formed to be wider than the width D 'of the band bands 20a, 20b, and 20c.

In addition to the bending portion (D) of the stopper (18a) described above, the bottom portion of the protruding portion that forms a predetermined distance (d) close to the end position of the inner smooth tube 10 and functions as a locking jaw, as mentioned above, By welding to the outer surface of the inner smooth tube 10, the band bands 20a, 20b, and 20c in the longitudinal direction of the inner smooth tube 10 can sufficiently transmit the pressure for bringing the inner smooth tubes 10 into close contact with each other. Will be.

In addition, the stopper 18b shown in FIG. 6D shows that the band bands 20a, 20b, and 20c can be provided with respect to a flat shape without protrusions on the outer wall of the inner smooth tube 10. FIG.

Naturally, the types of the stoppers 18a and 18b can be produced and reflected in various shapes other than those shown in FIGS. 1 to 6D.

Meanwhile, the band bands 20a, 20b, and 20c described above are steel sheets having a predetermined thickness, a width D ', and a length, as shown in FIGS. 1 and 7, on half of the side wall of the smooth tube 10. It is manufactured in the shape of a half arc of a degree less than a certain amount, and forms a plate body that is bent or welded in the normal direction with respect to the surface of the smooth tube 10 at the position at both ends of the longitudinal direction of these band bands (20a, 20b, 20c), The fastening fittings 22d and 22e which have the through-hole in the tangential direction with respect to the circumference | surroundings of the smooth pipe 10 in that position are provided in the surface.

In addition, at least one other various fasteners 22a, 22b, 22c having through holes in the width direction are provided on the surface of the band bands 20a, 20b, 20c, and these fasteners 22a, 22b, 22c are provided. Among the types of), as shown in FIGS. 1 to 7, a portion formed by bending a widthwise portion of the band band 20a to the outside and a portion formed by bending the through hole described above to have a sufficient area is small. It may be composed of the bent portion of the block shape having the above-described through hole and the welded to the surface of the band band 20a (22b, 22c).

These band bands 20a, 20b are placed in position away from the ends of the sleeves 12a, 12b, 12c, 12d, which are placed between the smooth tubes 10 by the stoppers 18a, 18b described above. It is fixed by the fastening of the bolt B2 and the nut N2 through the mutual fastening tool 22e by the shape which flashes the circumference with the smooth pipe 10 in between.

Thereafter, the band bands 20a, 20b, and 20c with the sleeves 12a, 12b, 12c, and 12d interposed therebetween pass through holes of the fasteners 22a, 22b, and 22c described above with respect to the longitudinal direction of the smooth tube 10. The bolt (B1) and the nut (N1) through the position is settled.

In this state, if the bolt B2 and the nut N2 that provide the clamping force to the band bands 20a, 20b, and 20c in the direction surrounding the smooth tube 10 are provided with a tightening force of about or more, the inner smooth tube 10 The outer wall and correspondingly the surface of the band bands (20a, 20b, 20c) is pressed in a direction close to, and in close contact with the bending portion of the protrusion (10a) and the stopper (18a).

Subsequently, the band bands 20a, 20b, and 20c facing each other with the annular projections 14a, 14b, 14c, and 14d of the aforementioned sleeves 14a, 14b, and 14c interposed therebetween are again added with the bolt B1 and the nut. By the fastening pressure of N1, the stoppers 18a and 18b are close to each other, and the inner smooth pipe 10 facing each other while limiting the distance between the band bands 20a, 20b and 20c facing each other. The ends of the pads are brought into close contact with the gaskets 16a, 16b, 16c, and 16d to provide airtightness to the inside of the inner smooth tube 10.

10: smooth tube 12a, 12b, 12c, 12d: sleeve
14a, 14b, 14c: annular projection 16a, 16b, 16c, 16d: gasket
18a, 18b: stopper 20a, 20b, 20c: band band
22a, 22b, 22c, 22d: fasteners

Claims (6)

Sleeves 12a, 12b, 12c, 12d whose depth fits into the inner smooth tube 10 by annular protrusions 14a, 14b, 14c, 14d protruding around the center portion of the outer wall;
A band is formed in the shape of a semi-circular arc, mutually press fastening to the shape surrounding the outer wall in each of the upper and lower sides around the inner smooth tube 10, and the mutual press fastening in the longitudinal direction of the inner smooth tube 10. Bands 20a, 20b, and 20c; And
The annular protrusions 14a, 14b, 14c, and 14d are fixed to the outer wall of the end portion of the inner smooth tube 10 to fasten the clamping force of the band bands 20a, 20b, and 20c to the longitudinal direction of the inner smooth tube 10. Stopper (18a, 18b) to be in close contact with the end of the inner smooth tube (10) on both sides based on the internal smooth pipe connection system characterized in that it comprises a.
The method of claim 1,
On the surface of the annular projection (14a, 14b, 14c) facing the end of the inner smooth tube 10 is further provided with gaskets (16a, 16b, 16c, 16d) to maintain airtightness by being pressed with an elastic material The pipe connection system for the internal smooth pipe, characterized in that made.
The method of claim 2,
The gasket is the pipe smoothing system for the internal smooth pipe, characterized in that (16a) is formed in a shape that integrally covers the entire outer surface of the annular projection (14a).
The method of claim 2,
The gasket is a pipe connection system for the internal smooth pipe, characterized in that the ring-shaped projections (16b) are respectively formed to cover the opposite sides of the annular projection (14a).
The method of claim 1,
The sleeve is made of a synthetic resin material having flexibility, elasticity and tensile strength, the annular projection is the pipe connection system for the inner smooth pipe, characterized in that formed integrally with the sleeve.
The method of claim 5, wherein
Two annular protrusions 14b are formed at regular intervals along the tube forming direction of the sleeve, and further include a reinforcement material R made of steel to compensate for the durability of the annular protrusion 14b made of synthetic resin. The pipe connection system for the internal smooth pipe, characterized in that it comprises.

Images