KR20230147379A - The double tube type coupling composed of inner tube and outer tube - Google Patents

Abstract

In the present invention,
A double-sided inner tube formed by integrally molding an inner tube with an inner diameter that is the size of the outer diameter of the wire pipe and an outer diameter that is the size of the inner diameter of the cap part, a penetration stopper in the middle of the inner tube, and an inner tube fixing ledge at the joint position on the outside of the inner tube; The cap parts are sized in consideration of overloading and jamming and are formed on both sides mainly with cap locking pieces, the exterior is formed on both sides with the inner and outer diameter sizes mostly being the inner and outer diameter sizes of the cap parts, and the exterior is combined to combine the two exteriors. It constitutes a double-pipe type coupling that connects piping, including A-type and B-type cap-integrated exteriors formed by molding the female and male threads separately into one piece, and the two-way inner pipe is connected to the A-type or B-type cap-integrated exterior. Push it in, insert the B-type or A-type cap-integrated exterior on the other side, and connect and tighten the female and male screws of both cap-integrated exteriors to easily and firmly assemble the double-pipe coupling in one step. The two-way inner pipe and the cap-integrated exterior are The bonding strength is strengthened by dispersing the shear force and bending moment applied to the joint through close contact, and the coupling point is reduced to one, significantly reducing the vulnerability of coupling risk. The external coupling portion of the protruding coupling body is attached with a fixing device due to the external structure. It can be used as space, and a flat cylinder is formed without any bends from the external joining part of the coupling body to the end, so it can be inserted into the concrete form penetration hole without a gap, making it easy to implement an application product that fixes the coupling to the pipe outlet. , a double tubular coupling consisting of an inner tube and an outer tube that improves the safety and quality of the product, provides diversity, improves constructability, and reduces manufacturing labor and construction costs is disclosed.
In addition, the unilateral inner pipe portion including the penetration stopper of the double-sided inner pipe, the heterogeneous connection pipe coupling portion formed to be connected according to the shape of the heterogeneous pipe, and the external coupling male screw for coupling with the female screw portion cap integrated exterior are formed as one piece. A heterogeneous connection double tubular coupling connecting a synthetic resin flexible wire pipe and a heterogeneous pipe is formed by combining a heterogeneous pipe-integrated inner tube; and a female threaded cap-integrated exterior; where one side maintains the shape and function of the double tubular coupling and the other On one side, a heterogeneous connection pipe joint such as a heterogeneous connection straight pipe joint that can directly connect straight pipe or metal flexible pipe and a female thread-shaped heterogeneous connection metal flexible pipe joint is formed, so that the synthetic resin pipe embedded in the slab or wall is brought out to the outside. In cases where it is exposed, it is possible to cope with limited changes to straight pipe or metal flexible conduit.

Description

{The double tube type coupling composed of inner tube and outer tube}

The present invention relates to a synthetic resin flexible conduit coupling (hereinafter referred to as a coupling) for connecting synthetic resin flexible conduit pipes required for wiring of electricity, communications, firefighting, mechanical equipment, etc. installed on building walls or slabs. More specifically, it relates to a synthetic resin flexible conduit coupling (hereinafter referred to as a coupling). Inside, a coupling inner tube with an intrusion stopper is placed in the center of the tube, and on the outside, an elastic cap locking piece is placed in a circular shape to form a cap part that takes into account the space behind the operation, and the coupling female thread and male thread are formed in pairs on both sides. By combining the cap-integrated exterior, a double tubular connector consisting of an inner and outer tube is completed.

It is about a double tubular coupling that can improve the safety performance and quality of products and reduce labor by improving productivity and constructability.

In general, piping is done to building slabs or walls using synthetic resin flexible conduit pipes required for wiring of electricity, communications, firefighting, mechanical equipment, etc., but for process convenience, the piping is cut at arbitrary points and partially constructed, and then used as a single pipe type in the next process. A synthetic resin flexible conduit pipe can be connected and extended using a coupling. A penetration stopper is formed in the center of the pipe of the coupling body, male threads as a means of coupling with the cap are formed at both ends of the coupling body, and an elastic cap locking piece is provided. Considering the space behind the operation, the cap is arranged in a circular shape and has a female thread as a connecting means with the coupling body, and is constructed by assembling the male and female threads.

In addition, the single-tubular coupling is composed of three separate segments, the coupling body and two caps assembled at both ends. First, one end of the coupling body and the cap are joined by male and female screw assembly, and secondly, the other side of the coupling body and the cap are separated. As it has to be completed by combining male and female screws, the male and female screws are joined in two places with short cross contact, increasing the number of joining areas vulnerable to structural damage by external forces to two places, which reduces safety and quality, and the two male and female screws are connected in two places. The manpower required for screw assembly increases, the caps on both ends of the coupling are formed bluntly, making it difficult to insert it into the formwork hole without a gap, and it is difficult to attach and form the fixing means at the desired appropriate location.

Accordingly, more processing manpower is required to assemble the coupling, which increases the labor cost, and the joint state is weak due to stress at the screw connection area, which reduces safety and quality, making it difficult to use the coupling.

1. Application number 10-2021-0187881 (Application date: 2021.12.26.)

The present invention is intended to solve such conventional problems, and its purpose is to reduce the coupling points of the coupling, to find a way to increase the shear stress and bending stress of the coupling points, and to prevent the conduit penetrating the coupling from loosening. Set the outer diameter size of the wire pipe and the inner diameter size of the coupling to be the same.

When penetrating a flexible conduit, the cap latching piece withdraws from the convex part of the flexible conduit corrugation, then elastically recovers in the concave groove and works to hold the flexible conduit. The inner diameter size of the cap is determined in consideration of the operating space of the cap latching piece, and the couple A coupling is constructed with a structure that can form an external coupling part in a position where fixing means such as hooks, fixing jaws, and fixing pins can be freely placed on the external coupling part where a protrusion is formed to allow the ring to be fixed to another structure. By doing,

By forming a two-segment component, only one exterior joint is required. The inner pipe supporting the exterior joint portion shares the shear force and bending moment to prevent the joint from falling off, and both ends of the coupling are formed smoothly without bending to provide form penetration. By constructing a coupling that can be inserted and installed without a gap, and that can be freely attached as one piece by adjusting the coupling fixing means on the exterior of the coupling to a position suitable for the purpose,

It provides a double pipe type coupling that can connect piping by simply combining the inner and outer pipes, which improves the safety and quality of the product and reduces assembly labor and construction costs by improving productivity and constructability.

In order to achieve the above purpose,

An embodiment of the present invention divides the inner diameter and outer diameter of the coupling into an inner tube and an outer tube based on the circumference corresponding to the inner diameter of the cap, so that the inner tube forms an intrusion stopper at the center of the tube and an inner tube fixing ledge at the outer coupling area. The exterior is divided into two halves by selecting a location suitable for the purpose, integrating the caps on each side, adding female and male threads as a connecting means for both exteriors, and assembling both exteriors.

In an embodiment of the present invention, an inner tube formed with an inner diameter of the pipe outer diameter size and an outer diameter of the cap part inner diameter size; and a cap latching piece that is fixed by elastic restoration in the groove of the corrugation of the penetrating flexible wire pipe and a convex part of the corrugation backward from the convex part of the corrugation. Including a cap part that takes into account the operating space of the receding cap locking piece, an exterior coupling part formed by the inner and outer diameter sizes of the cap part, and both exteriors formed by integrally molding the exterior coupling female and male screws, respectively. A double-tubular coupling can be formed by placing the inner tube inside and simply joining both outer tubes to form a coupling.

By applying the present invention, the inner tube of the coupling is placed inside, the outer caps are formed on both sides, and the connecting male and female screws formed on each are tightened to easily and firmly complete a double tube type connector in one step to connect the pipe.

Applying another example of the present invention, both ends of the double tubular coupling are formed smoothly without bending, making it easy to insert and install into the mold through hole without a gap, and the coupling fixing means can be freely integrated on the exterior of the coupling at a position suitable for the purpose. It can be applied to the formation and fixation of various couplings.

In addition, by applying the double tube type formed by the inner tube and the outer tube according to the present invention, the combined connection area of the inner tube and the outer tube is expanded, dispersing the shear force and bending moment applied by the external force applied to the connector and strengthening the bonding force, By reducing the connection risk by reducing the connection points, the safety and quality of the product are improved and constructability is significantly improved, thereby reducing assembly labor and construction costs.

The double tubular coupling, which can be fixed to a box by simply combining the inner and outer tubes, improves the safety performance and quality of the product and reduces labor costs by improving productivity and constructability.

Figure 1 is a perspective view and cross-sectional cutaway view showing the shape of a conventional three-segment single-tubular coupling and the state in which the coupling body and cap are coupled.
Figure 2 is a perspective view and a cross-sectional cutaway perspective view showing the configuration and combined state of a double tubular coupling consisting of two segments according to an embodiment of the present invention.
Figure 3 is a perspective view and a cross-sectional cutaway perspective view showing a state in which the coupling part, which is the fixing device installation space of the double tubular coupling, is moved up and down according to an embodiment of the present invention.
Figure 4 is a perspective view and a cross-sectional cutaway perspective view showing the configuration of a heterogeneous connection double tubular coupling according to another embodiment of the present invention.
Figure 5 is a perspective view and a cross-sectional cutaway perspective view showing the configuration of a double tubular hook assembly coupling according to another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the attached drawings.

Referring to Figure 2, a double-tubular coupling (30) that connects the pipes by integrally combining the two-way inner pipe (35) and the cap-integrated outer pipe (31) A and B according to the present invention;

The inner tube is formed with the inner diameter of the outer diameter of the wire pipe and the outer diameter of the inner diameter of the cap part (32), the penetration stopper ridge (36) formed in the middle of the inner tube, and the inner tube fixing ridge (37) formed at the external outer joint position on the outside of the inner tube are integrated. A double-sided inner tube (35) formed by molding; and,

The size is determined considering the penetration and jamming of the conduit, and the cap part (32) is formed on both sides mainly with the cap locking piece (33), and the inner and outer diameter sizes are mostly formed on both sides with the inner and outer diameter sizes of the cap part (32). It is composed of an A-type and B-type cap-integrated outer shell (31), which is formed by separately molding the outer shell and the outer coupling female and male screws (34) that connect the two outer facades to each other.

Referring to Figure 3, the double-tubular coupling 30, which connects the pipes by integrally combining the double-sided inner pipe 35 and the cap-integrated outer pipe 31 A and B according to the present invention, is coupled and fixed to another structure. In order to place the cylindrical outer-shaped fixture attachment space (39) where the means can be installed in a location suitable for the purpose rather than in the exact center of the double tubular coupling (30), the coupling positions of both exterior pipes (31) are lowered or raised as necessary. It shows that the positions of the exterior coupling arm and male screw (34) and the inner pipe fixing jaw (37) and the length of the cap-integrated exterior pipe (31) on both sides can be adjusted, and it is a double pipe type coupling in which the upper pipe is not connected when pouring concrete. It shows that a stopper attachment space (38) can be formed outside the end of the double tubular coupling (30), where a screw for attaching a stopper can be installed in the upper plumb hole of (30).

Referring to FIG. 4, a heterogeneous connection double pipe coupling (40) that connects the pipes by integrally combining the heterogeneous pipe integrated inner pipe (44) and the female thread cap integrated outer pipe (41) according to the present invention; one side has a synthetic resin flexible conduit pipe. The other side is connected to the unilateral inner pipe part 45, which includes the penetration stopper 36 of the double-sided inner pipe 35, according to the shape of the heterogeneous pipe, so that heterogeneous pipes such as straight pipe or metal flexible pipe can be combined. The heterogeneous connection pipe coupling portions (47, 48, 49) and the external coupling male screw (34) that connects to the female screw portion cap-integrated exterior pipe (41) are integrally molded to form the heterogeneous pipe integrated inner pipe (44). It is constructed by assembling the external coupling female screw (34) of the cap-integrated outer tube (41) and the external coupling male screw (34) of the heterogeneous tube integrated inner tube (44) so that the inner tube part (45) goes toward the cap-integrated outer tube (41).

Referring to Figure 5, a double tubular hook assembly coupling (50) for connecting piping by integrally combining the hanging groove cap integrated outer pipe (51) and the hanging piece inner pipe (55) or the hanging piece heterogeneous pipe integrated inner pipe (54) according to the present invention. ); forms a locking groove (52) on the cap-integrated outer pipe (31) A·B to form a locking groove portion cap-integrated outer pipe (51); An elastic locking piece (53) is formed at one end of the unilateral inner tube portion (45) of the inner tube (44) to form a locking piece inner tube (55); Or a double tubular hook assembly coupling ( 50); or by assembling the hook groove cap integrated outer tube (51) A and the hook piece integrated heterogeneous pipe inner tube (54) to form a double tubular hook assembly coupling (50).

The operation of the present invention achieved in this way is as follows.

Referring to Figure 2, the double-sided inner pipe (35) with an intrusion stopper (36) in the center is pushed into the A-type or B-type cap-integrated outer pipe (31), and the B- or A-type cap-integrated outer pipe (31) is By inserting it on the opposite side, combining and tightening the female and male threads of both cap-integrated outer tubes (31), the double-tubular coupling (30) can be easily and firmly assembled in one step, and the two-way inner tube (35) and the cap-integrated outer tube (31) are in close contact. The coupling strength is strengthened by distributing the shear force and bending moment applied to the coupling part, and the coupling point is reduced to one, significantly reducing the vulnerability of coupling risk. The external coupling part of the protruding coupling body is used as a fixture attachment space due to the external structure. It can be used as (39), and a flat cylinder is formed without bends from the external joining part of the coupling body to the end, so it can be inserted into the concrete form through hole without a gap, so it can be used as an application product that is fixed to the pipe outlet using a coupling. It is easy to install, improving the safety and quality of the product, providing diversity, and improving constructability, thereby reducing manufacturing labor and construction costs.

Referring to FIG. 3, the joining portions of the cap-integrated exterior (31) A and B of the double tubular coupling (30) can be adjusted up and down to set the fixture attachment space (39) at an appropriate position for the purpose. , it shows that a stopper attachment space 38 can be provided at the end of the cap-integrated exterior 31, where a stopper attachment means such as a male screw can be integrally molded.

Referring to FIG. 4, the heterogeneous connection double tubular coupling 40 includes an A-type cap integrated outer pipe 41 and a penetration stopper 36 of the double-sided inner pipe 35 on one side so that a synthetic resin pipe can be connected. A single-sided inner pipe portion (45) is formed to maintain the shape and function of the double tubular coupling (30), and the other side is a heterogeneous connection straight pipe coupling portion (48) that can directly connect a straight pipe or a metal flexible pipe and a female thread shape. By forming a heterogeneous connection pipe joint (47) that is formed to be connected according to the shape of the heterogeneous pipe, such as the heterogeneous connection metal flexible pipe joint (49), the synthetic resin flexible conduit pipe embedded in the slab or wall is pulled out to the outside and connected to a straight pipe or metal pipe. It is possible to cope with the case where the construction is changed to a flexible conduit.

Referring to Figure 5, the double tubular hook assembly coupling (50) in which cap parts (32) are formed on both sides is made by pushing the inner tube (55) into the hook groove cap integrated outer tube (51) A or B. Using the elastic action of 53), it is inserted into the locking groove 52 of the locking groove cap integrated outer tube 51, and the remaining locking groove cap integrated outer tube 51 B or A is connected to the inner tube of the locking piece by combining the concave and convex parts on both sides. Cover (55) and push it all the way to the end to insert the locking piece (53) into the locking groove (52) using elastic action to complete the assembly easily and firmly in one step. A cap part (32) is formed on one side and a subtype connection is made on the other side. The double tubular hook assembly coupling (50), in which the pipe joints (57, 58, 59) are formed, has a locking piece (53) by pushing the heterogeneous pipe-integrated locking piece inner tube (54) into the locking groove cap-integrated outer tube (51) A. Using elastic action, it is inserted into the locking groove (52) to complete the assembly easily and firmly in one step. When the pipe is inserted into the coupling, the locking piece (53) cannot be elastically moved back, creating a double tubular coupling (50). The combination of the locking piece 53 of the locking piece inner tube 55 or the heterogeneous pipe integrated locking piece inner tube 54 and the locking groove 52 of the locking groove cap integrated outer tube 51 becomes more robust.

Accordingly, the existing single-tubular coupling (10) was completed through two screw assembly processes, but the double-tubular coupling (30) of the present invention shortens the process with only one screw assembly process, reducing labor and construction costs. It is easy to implement application products that reduce coupling points and coupling risks, strengthen coupling strength by increasing mating contact area, and fixing couplings, thereby improving overall product safety and quality and constructability. By improving it, assembly labor and construction costs can be reduced. In addition, the double tubular hook assembly coupling (50) can reduce manufacturing labor by molding and assembling the double tubular coupling (30) without screws, thereby reducing material costs. It will happen.

10. Single pipe coupling (3 segments)
11. Coupling body 12. Intrusion jaw (coupling body)
13. Cap coupling male screw (coupling body) 15. Cap (flexible conduit coupling)
16. Cap locking piece (cap → flexible conduit) 17. Coupling body connecting female screw (cap)
30. Double tubular coupling (2 segments)
31. Cap integrated appearance (A: concave, B: concave) 32. Cap part (exterior)
33. Cap locking piece (cap part → flexible conduit) 34. Exterior combined female screw/male screw (exterior)
35. Bilateral inner tube 36. Intrusive low jaw (inner tube)
37. Inner tube fixing jaw (inner tube) 38. Stopper attachment space
39. Fixing device attachment space
40. Heterogeneous connection double tubular coupling
41. Cap integrated appearance (A: concave) 42. Cap part (exterior)
44. Heterogeneous integrated inner tube 45. Unilateral inner tube
47. Heterogeneous connection pipe joint 48. Heterogeneous connection pipe joint
49. Heterogeneous connection metal flexible pipe joint
50. Double tubular hook assembly coupling (2 segments)
51. Hanging groove cap integrated appearance (A: Concave, B: Concave) 52. catch groove
53. Locking piece 54. Two-piece pipe integrated locking piece inner pipe
55. Locking piece inner pipe (two-way type) 7. Different type connection pipe joint
58. Heterogeneous connection straight pipe joint 59. Heterogeneous connection metal flexible pipe joint

Claims (3)

The inner diameter and cap part (32) that match the outer diameter size of the wire pipe, the inner pipe formed with the outer diameter that matches the inner diameter size, the penetration stopper jaw (36) formed in the middle of the inside of the pipe, and the inner pipe fixing jaw (37) formed at the outer joint position on the outside of the inner pipe. ) a double-sided inner tube (35) formed by integrally molding; and,
The cap part (32) is sized to fit the penetration and jamming of the conduit and is formed on both sides mainly with the cap locking piece (33), and the exterior is formed on both sides with the inner and outer diameter sizes mostly being the inner and outer diameter sizes of the cap part (32). And, A-type and B-type cap-integrated exteriors (31) formed by separately integrally molding the exterior coupling female and male screws (34) that connect both exterior exteriors to each other.
A double tubular coupling (30) consisting of an inner tube and an outer tube. In paragraph 1
A single-sided inner pipe portion (45) including the penetration stopper 36 of the double-sided inner pipe (35) of claim 1, a heterogeneous connection pipe coupling portion (47) formed to be connected to the shape of the heterogeneous pipe, and a female thread portion. A heterogeneous pipe integrated inner tube (44) formed by integrally molding the outer coupling male screw (34) coupled to the cap integrated outer tube (41);
The cap-integrated exterior (31) of claim 1 in which the exterior coupling female screw (34) is integrally formed;
A double tubular coupling (30) consisting of an inner tube and an outer tube. In paragraphs 1 and 2 above,
A double-sided locking piece inner tube (55) in which elastic locking pieces (53) are formed at both ends of the double-sided inner tube (35) in place of forming the outer coupling female screw and male screw (34) on the cap-integrated outer tube (31) of claim 1. ); and a locking groove cap-integrated exterior (51) on both sides forming a locking groove (52); or
Or, instead of the female thread of the cap-integrated outer pipe (41) and the male thread of the heterogeneous pipe-integrated inner pipe (44), an elastic locking piece (53) is formed on one end of the one-sided inner pipe portion (45) (54). ); and a locking groove cap integrated exterior (51) on one side forming a locking groove (52),
A double tubular coupling (50) composed of features.