KR20010044523A - Dual industrial structure of elbow and the manufacturing process - Google Patents

Abstract

PURPOSE: An elbow is composed of double pipe structure to have an insulator built in to prevent noise and freezing and dewing phenomena. CONSTITUTION: An elbow manufacturing method comprises a step to extrude an inner pipe(32) with stepped parts on both sides therein, a step to cover the periphery of the inner pipe(32) extruded with insulator(40) with a certain thickness, a step to extrude covers(38a, 38b) equally divided and having an engaging protrusion(38') and an engaging groove(38") on the upper and the lower ends thereof, a step to cover the insulator(40) covering the periphery of the inner pipe(32) with the covers(38a, 38b) to shelter and a step to extrude an outer pipe(34) on the inner pipe(32).

Description

Elbow having a double tube structure and a method of manufacturing the same {DUAL INDUSTRIAL STRUCTURE OF ELBOW AND THE MANUFACTURING PROCESS}

The present invention relates to an elbow having a double pipe structure and a method of manufacturing the same, and more particularly, having a double structure consisting of an inner and an outer pipe, and having a built-in heat insulating material for sound insulation and insulation, noise generated when draining domestic wastewater (wastewater). The present invention relates to an elbow having a double pipe structure and a method for manufacturing the same, which prevent the freezing and freezing and condensation.

In general, the elbow is to connect the pipe of the bent portion in the transfer and supply of fluid by using a variety of pipe, it is made in a variety of types depending on the use and form used.

Mainly, synthetic resin pipes are used for sewage pipes and toilets, and elbows are used as a means for connecting such synthetic resin pipes. Currently, elbows with short pipe structures are used, but elbows with short pipe structures include noise, freezing, and dew condensation. We have a vulnerability.

Therefore, to compensate for the weaknesses occurring in the elbow of the short pipe structure as described above, elbows having various types of double pipe structures are being developed, and the elbow (utility model registration application No. 99-18338) of the currently known double pipe structure is attached to the accompanying drawings. As shown in FIG. 1, the step 3 is integrally formed on the upper end 2 of the main body 1, and the upper connecting pipe 4 is integrally formed in the upper part 2, and the upper end 2 of the main body 1 is integrally formed. The lower curved portion 5 is formed as a double wall, but the inner wall 6 is formed with a joining end 14 in contact with the joining end 7 of the upper end 2, while the outer wall 15 has the upper end 2 Coupling ribs are formed in the lower end portion 11 formed by forming a joint end portion 16 in contact with the coupling end surface 9 of the c) by ultrasonic fusion and forming an inner wall 13 and the outer wall 15 to form a smooth curved surface. Protruding the 17 so as not to step with the inner wall 13, the lower end At the end of the portion 11, the bolt portion 18 is integrally formed on the outer circumferential surface and the cap 20 is coupled in the state where the ring 19 is fitted.

However, in the conventional elbow as described above, complete fusion cannot be made due to an error generated at the end joining by ultrasonic welding, so that the outer wall has a gap in the joint end surface, which causes water leakage or a curved double shape. Since the inner wall and outer wall must be molded integrally at the same time, not only is the manufacturing process difficult, but the air layer formed between the inner wall and the outer wall does not achieve a vacuum state, so the sound insulation effect for noise reduction is reduced. It is possible to prevent, but due to the condensation phenomenon is the moisture in the air layer is a problem that causes freezing phenomenon due to freezing in winter.

As an elbow for solving the above conventional problems, it was proposed by Utility Model Registration No. 207821 (double elbow fitting pipe for fold drainage, hereinafter referred to as a draft), and the elbow according to the draft is an elbow shape of a synthetic resin material. The inner tube is formed to have a diameter smaller than the tube inserting portion of the both ends, two stages of the locking jaw formed on the outer surface adjacent to both ends of the inner tube, and the two stages of the engaging jaw is supported by a constant gap with the inner tube In order to form an outer wall of the elbow shape, it is made of a cover provided with a coupling member at the joining end so as to be separated and coupled up and down.

Therefore, although the problems caused by the elbow in accordance with the draft to solve some of the problems caused in the conventional elbow, both of them are noise problems, that is, the vulnerability to freezing phenomenon due to sound insulation and freezing has emerged as a common problem.

The present invention is to solve the above problems, the purpose is to have a double pipe structure of the elbow, by embedding the heat insulating material in the hollow formed between the inner tube and the exterior, absorbing and dissipating the noise generated during drainage It is to provide an elbow and a manufacturing method of a new type of double pipe structure to increase the sound insulation effect, as well as to increase the heat insulation effect by the heat insulating material to prevent condensation and freezing.

In order to achieve the above object, the present invention, in the elbow made of the inner tube and the outer appearance, the outer tube is formed integrally by injection by the injection, the hollow portion is formed between the inner tube and the outer portion, the hollow portion is divided into It is characterized by a built-in heat insulating material wrapped by the cover to be divided.

In the present invention as described above, one side upper and lower ends of the cover has a hook-type fastening protrusion protrudes and the other upper and lower end corresponding to this has a feature that a fastening groove is formed.

In addition, the step of injection molding the inner tube formed in the stepped portion on both sides of the inner surface, the step of wrapping the heat insulating material having a certain thickness on the outer peripheral surface of the injection-molded inner tube, the cover is divided into equal parts and formed on the upper and lower ends with fastening projections and fastening grooves respectively The elbow having a double pipe structure by injection molding, by wrapping and shielding the insulation wrapped on the outer peripheral surface of the inner tube with the injection molded cover, the injection molding the appearance on the inner tube wrapped so that the insulation is shielded by the cover Has the features to be manufactured.

1 is a cross-sectional view of a state of use showing a conventional elbow,

2 is a partial cross-sectional perspective view showing an elbow according to the present invention;

3 is a longitudinal sectional view of the elbow according to the present invention;

Figure 4 is a cross-sectional view of the use state of the elbow according to the present invention,

5 is a flowchart illustrating a method of manufacturing an elbow according to the present invention.

<Explanation of symbols for main parts of drawing>

30: Elbow 32: Interior

32a: first drain pipe 32b: second drain pipe

34: Appearance 36: Hollow department

38a, 38b: Cover 38 ': Fastening protrusion

38 ": Fastening groove 40: Insulation

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

As shown in Figures 2 to 4, the elbow 30 according to the present invention, the inner tube 32 and the outer 34 is made integrally by injection molding, between the inner tube 32 and the outer 34 The hollow part 36 is formed, and the said hollow part 36 has the structure which the heat insulating material 40 wrapped by the outer peripheral surface of the said inner pipe 32 is shielded by the cover 38a, 38b divided equally.

At this time, the inner pipe 32 is partitioned into first and second drain pipes 32a and 32b so that sewage and wastewater are separated and drained, and hook-type fastening protrusions 38 'are formed at upper and lower ends of one side of the cover 38a and 38b. ) Protrudes and a fastening groove 38 "is formed at the other upper and lower ends corresponding thereto.

Figure 4 is a cross-sectional view of the use of the elbow according to the present invention, the inner tube 32 and the exterior 34 is injection molded to have a predetermined hollow portion 36, the hollow portion 36 in the cover (38a, 38b) Heat insulating material 40 is shielded by the inner pipe 32 surrounding the outer circumferential surface and inserted into both ends of the inserted elbow 30 for drainage (not shown in the figure to refer to the toilet) and the synthetic resin pipe 50 respectively will be.

At this time, the waste water drained from the drainage is drained along the synthetic resin pipe 50 while being diverted through the inner pipe 32 of the elbow 30, in the waste water is drained through the inner pipe 32 of the elbow 30, The dew condensation generated on the outer circumferential surface of the inner tube 32 due to the pressure (water pressure) of the waste water and the noise and temperature difference caused by contact with the inner surface of the inner tube 32 is inserted between the inner tube 32 and the outer tube 34. 40 is absorbed and dispersed, so that noise is not transmitted to the outside through the exterior 34, and moisture (droplets) generated due to condensation is absorbed and evaporated by the heat insulator 40, so that it is not accumulated in the hollow portion 36. do.

Figure 5 is a flow chart for explaining the manufacturing method of the elbow according to the present invention, the step (S10) and the injection molding of the inner tube (32) having a stepped portion formed on both sides of the inner surface, the outer peripheral surface of the injection molded inner tube (21) Step (S20) to be wrapped around the heat insulating material 40 having a predetermined thickness, and the cover (38a, 38b) formed by dividing and dividing and the fastening projection 38 'and the fastening groove 38 "formed in the upper and lower ends, respectively Forming step (S30), and wrapping and shielding the heat insulating material 40 wrapped on the outer circumferential surface of the inner tube 32 with the injection molded covers 38a and 38b (S40), and the heat insulating material 40 covers 38a. After the injection molding the exterior 34 to the inner tube 32 wrapped to be shielded by (38b) (S50) has a double tube structure with a heat insulating material 40 shielded by the covers 38a, 38b It shows that the elbow 30 is manufactured.

Here, the heat insulating material 40 is made of a sponge or synthetic fiber, and the like, the injection molding of the inner tube 32, the outer 34 and the cover (38a, 38b) by a conventional injection molding method, a detailed drawing Notation and description will be omitted.

In the figure, reference numeral 52 is a packing and 52 is a tightening cap.

Referring to the use state of the present invention as follows.

As shown in Figure 2 to 5, the step (S10) for injection molding the inner tube 32, the stepped portion is formed at both ends of the inner surface, and the heat insulating material 40 having a constant thickness on the outer peripheral surface of the injection-molded inner tube (32) ) (S30) and the injection molding of the cover (38a, 38b) is divided and divided into equal parts, divided and formed in the upper and lower ends and formed with a fastening protrusion 38 'and a fastening groove 38 ", respectively, Wrapping and shielding the insulation 40 wrapped around the outer circumferential surface of the inner tube 32 with the injection molded covers 38a and 38b, and wrapping the insulation 40 to be shielded by the covers 38a and 38b. A hollow portion 36 is formed between the inner tube 32 and the outer shell 34 by using the manufacturing method of injection molding the outer shell 34 on the inner inner tube 32 (S50), and the hollow portion 36. ) Is provided with an elbow 30 having a double pipe structure in which a heat insulating material 40 wrapped around the outer circumferential surface of the inner tube 32 is shielded by covers 38a and 38b divided into equal parts. In the state, in order to connect the synthetic resin pipe 50 to drain the waste water, one end of the elbow 30 is first coupled to communicate with the drainage.

In this state, the other end of the synthetic resin pipe (50) that is the drainage of the waste water is connected to the communication, and then fixed with a cap (52), the drainage for the drainage of waste water using the elbow 30 and the synthetic resin pipe (50) ) Is completed.

As such, when the wastewater is drained from the drainage to the synthetic resin pipe 50 through the elbow 30, when the user drains the wastewater using the drainage, the wastewater from the drainage communicates with the elbow 30 via the elbow 30. Drained through the combined synthetic resin pipe 50, the sewage is drained through the first drain pipe (32a) formed in the inner pipe 32 and the waste water is separated and drained through the second drain pipe (32b), wherein the waste water is predetermined Since the pressure (water pressure) of the contact with the inner surface in the process of passing through the elbow (30), the noise caused by the contact or the noise caused by the pressure (water pressure) is generated, but such noise surrounds the inner tube 32 and covers Sound absorbed and dispersed by the heat insulating material 40 inserted to be shielded by the 38a and 38b is extinguished so that the generated noise is not transmitted to the outside through the exterior 34 to be soundproofed.

In addition, the heat insulating material 40 inserted between the inner pipe 32 and the exterior 34 has a heat insulating effect as well as a sound insulation effect, so the inner pipe 32 due to a temperature difference (waste water itself temperature and external temperature difference) during waste water drainage. ) Condensation on the outer circumferential surface is prevented, and in particular, freezing phenomenon due to winter freezing is prevented.

Here, the elbow according to the present invention is applicable not only to the elbow forming the # 90 °, but also to the elbow forming the # 45 °.

In this way, in draining the waste water from the drainage, the sound generated by the pressure (water pressure) and the contact with the inner surface can be absorbed and dispersed to achieve perfect sound insulation, and due to the dew condensation and the winter freezing caused by the temperature difference. It is possible to prevent the freezing of the elbow 30 and the synthetic resin tube 50 due to.

Thus, the elbow is made of a double pipe structure, as the insulation is inserted between the inner tube and the exterior, it is possible to increase the sound insulation effect by absorbing and dispersing the noise generated by pressure (water pressure) and contact during waste water drainage. It is possible to prevent condensation and freezing by increasing the insulation effect, and to prevent freezing of the elbow and the synthetic resin pipe during the winter season, thereby obtaining an efficient and economical effect.

Claims (3)

In the elbow consisting of the inner tube (32) and the outer (34), The outer tube 34 is integrally molded by injection on the outer surface of the inner tube 32, and the inner tube 32 is partitioned into first and second drain pipes 32a and 32b and hollowed between the inner tube 32 and the outer tube 34. Section 36 is formed, The hollow portion 36 has a double pipe structure, characterized in that the heat insulating material 40 is shielded by the cover (38a, 38b) divided into equal parts. The method of claim 1, One side of the cover (38a, 38b) elbow having a double pipe structure, characterized in that the hook-shaped fastening projection (38 ') protrudes on the one side and the other upper and lower end corresponding to the fastening groove (38 ") is formed. Injection molding the inner tube 32 in which the stepped portions are formed at both ends of the inner surface (S10); A step (S20) of surrounding the heat insulating material 40 having a predetermined thickness on an outer circumferential surface of the injection molded inner tube 32; Injection molding the covers 38a and 38b equally divided and having upper and lower ends with fastening protrusions 38 'and fastening grooves 38 ", respectively (S30); Wrapping and shielding the heat insulating material (40) wrapped around the outer circumferential surface of the inner tube (32) with an injection molded cover (38a, 38b); Method for producing an elbow having a double tube structure consisting of a step (S50) of the outer mold 34 is injected into the inner tube (32) wrapped so that the heat insulating material 40 is shielded by the cover (38a, 38b).