Integrated pipe, apparatus for manufacturing same, and manufacturing method using same

Abstract

An integrated pipe according to an embodiment is arrived at via: a first molded product obtained by placing a plurality of tubes between a pair of plate-shaped insulating materials and pressing the pair of plate-shaped insulating materials; a second molded product molded to have a round rod shape by bending the first molded product so as to surround a post-input electric cable in a state in which the post-input electric cable is positioned on the first molded product; and a third molded product molded while surrounding the outer circumferential surface of the second molded product with an extrudate made of a molten synthetic resin, wherein ridge portions and valley portions are formed on the inner and outer circumferential surfaces of the extrudate and the outer circumferential surface of the second molded product, and the inner circumferential surface of the extrudate and the outer circumferential surface of the second molded product are fused together. The integrated pipe comprises: a protective conduit formed by cooling the extrudate; an insulator that is formed by molding the pair of plate-shaped insulating materials and accommodates the plurality of tubes and the post-input electric cable therein; and an adhesive layer formed between the inner circumferential surface of the protective conduit and the outer circumferential surface of the insulator.

Description

Integrated pipe, manufacturing device for manufacturing the same, and manufacturing method using the same

[0001] The following examples relate to an integrated pipe, a manufacturing device for manufacturing the same, and a manufacturing method using the same. More specifically, the examples relate to an integrated pipe that prevents bending of the tube and other components by forming a protective tube and insulation material as one unit, thereby stably securing insulation and waterproofing properties.

[0002] Typically, a building's heating and cooling system or insulated piping system involves installing refrigerant pipes to supply the heating and cooling medium, along with control and power cables to control the system. These tubes and cables are buried in the slab or walls of the building during construction. To ensure insulation, waterproofing, and airtightness, each tube and cable is wrapped in insulation and then installed as a multi-tube conduit, encased in a protective tube.

[0003] Multi-tube pipes are generally constructed with wire cables and heating and cooling medium tubes embedded within a protective tube made of synthetic resin, and are typically wrapped with insulation to prevent heat loss from the refrigerant or heating and cooling medium tubes.

[0004] Conventional techniques include insertion methods, whereby a tube and wire cable are wrapped with insulating tape and then inserted into a protective tube, or wrapping the tube and wire cable with insulating tape, then cutting the protective tube lengthwise and inserting it inside. However, these methods are problematic in that friction makes insertion into the protective tube difficult and the insertion length is limited. Furthermore, since the insulation and protective tube are not integrated, slippage is likely to occur, increasing the risk of bending and damage to the tube.

[0005] The purpose of the examples is to form a protective tube and an insulating material as one piece, thereby preventing slippage of the insulating material when bending the pipe and easily preventing bending of the tube, etc.

[0006] In addition, the embodiments aim to prevent detachment of the insulation material by forming an adhesive layer between the protective tube and the insulation material, thereby keeping the protective tube and the insulation material fixed.

[0007] In addition, the embodiments aim to prevent the diameter of the completed pipe from becoming excessively large or the position and spacing between the tubes and the wire cables from becoming random by positioning a portion (a plurality of tubes and wire cables) between a pair of plate-shaped insulation members and then additionally inserting the wire cables while the pair of plate-shaped insulation members is pressurized and then bending them.

[0008] In addition, the embodiments aim to improve the waterproofing and thermal insulation of the integrated pipe by making the thickness of the pair of plate-shaped insulation materials different depending on the configuration and diameter difference of the plurality of tubes, the wire cable, and the post-injection wire cable.

[0009] In addition, the embodiments aim to improve the waterproofing and insulation properties of the integrated pipe by appropriately setting the position where the above-mentioned post-injection wire cable is inserted.

[0010] According to one embodiment of the present invention, an integrated pipe comprises: a first molded product in which a plurality of tubes are placed between a pair of plate-shaped insulating materials and the pair of plate-shaped insulating materials are pressurized; a second molded product in which the first molded product is formed to have a round bar shape by being curved to surround a later-injected wire cable while the later-injected wire cable is positioned on the upper side of the first molded product; a third molded product in which an extrudate made of a molten synthetic resin is formed while wrapping the outer circumference of the second molded product, so that peaks and valleys are formed on the inner and outer circumferences of the extrudate and the outer circumference of the second molded product, and the inner circumference of the extrudate and the outer circumference of the second molded product are integrally fused together; the integrated pipe may include a protection tube formed by cooling the extrudate; an insulation material formed by molding the pair of plate-shaped insulating materials and accommodating the plurality of tubes and the later-injected wire cable therein; and an adhesive layer formed between the inner circumference of the protection tube and the outer circumference of the insulation material.

[0011] The above-mentioned post-injection wire cables may be a plurality, and the plurality of post-injection wire cables may include a first post-injection wire cable and a second post-injection wire cable having a smaller diameter than the first post-injection wire cable.

[0012] The first post-injection wire cable may be positioned between the plurality of tubes on the upper side of the first molded product, and the second post-injection wire cable may be bent while being positioned in the outer region of one of the plurality of tubes on the upper side of the first molded product.

[0013] The above pair of plate-shaped insulation materials includes a first plate-shaped insulation material whose upper surface contacts the post-injection wire cable, and a second plate-shaped insulation material positioned below the first plate-shaped insulation material and forming an outer surface of the second molded product after being bent, and when the outer diameter of the post-injection wire cable is larger than the outer diameter of any one of the plurality of tubes, the thickness of the first plate-shaped insulation material may be formed to be larger than the thickness of the second plate-shaped insulation material.

[0014] According to one embodiment of the present invention, an integrated pipe manufacturing device comprises: a first molding machine for pressing the pair of plate-shaped insulators while the plurality of tubes are interposed between them; a post-injection machine for inserting a post-injection wire cable into a set position above the first molding machine; a second molding machine for sequentially bending the first molding machine into a semicircle, a C-shape, and a round bar shape while the post-injection wire cable is positioned above the first molding machine; a third molding machine for inserting a molten synthetic resin into the outer circumference of the second molding machine to form an extruded product; an extruder for supplying the molten synthetic resin to the third molding machine; And a fourth molding machine for forming a spiral mountain and valley portion in the third molded product to create an integrated pipe, wherein the integrated pipe may include a protective tube formed by cooling the extruded product, an insulating material formed by molding the pair of plate-shaped insulating materials and accommodating the plurality of tubes and the post-injection wire cables therein, and an adhesive layer formed between the inner surface of the protective tube and the outer surface of the insulating material.

[0015] According to one embodiment of the present invention, a method for manufacturing an integrated pipe comprises: a first molding step of transporting a pair of plate-shaped insulating materials and a plurality of tubes so that the plurality of tubes are positioned between the pair of plate-shaped insulating materials, and pressurizing the pair of plate-shaped insulating materials so that facing surfaces of the pair of plate-shaped insulating materials are fused to form a first molded product; an additional insertion step of inserting a post-injection wire cable into a set position on the upper side of the first molded product; a second molding step of sequentially bending the first molded product into a semicircle, a C-shape, and a round bar shape while passing through a bending roller, while the post-injection wire cable is positioned at the set position on the upper side of the first molded product, to form a second molded product in the form of a round bar; a third molding step of transporting the second molded product and simultaneously cooling the outer surface of the second molded product, thereby compressing a pipe-shaped extruded product having a circular cross-section that surrounds the second molded product to form a third molded product; A fourth molding step is included in the third molded product to form a spiral mountain and valley portion to complete an integrated pipe, and the integrated pipe includes a protective tube formed by cooling the extruded product, an insulating material formed by molding the pair of plate-shaped insulating materials and accommodating the plurality of tubes and the post-injection wire cables therein, and an adhesive layer formed between the inner surface of the protective tube and the outer surface of the insulating material, and the second molding step may further include a step of additionally heating an area where both ends of the first molded product meet after passing through the curved roller.

[0016] According to one embodiment of the present invention, a protective tube and an insulating material constituting an integral pipe are formed integrally, thereby preventing slippage of the insulating material when bending the pipe and easily preventing bending of the tube, etc.

[0017] In addition, according to an embodiment of the present invention, by forming an adhesive layer between the protective tube and the insulating material, the protective tube and the insulating material are fixed, thereby preventing the insulating material from detaching, thereby ensuring strong insulating properties and waterproofing properties.

[0018] In addition, according to an embodiment of the present invention, by heating the outer surface of the insulating material constituting the second molded product once more before molding the protective tube, the molding state can be improved by ensuring that there is no gap that is not bonded to the outer surface of the second molded product.

[0019] Furthermore, according to an embodiment of the present invention, by enclosing and bending the plurality of tubes and the wire cables while being pressurized by the pair of plate-shaped insulating materials and the subsequent insertion wire cables, the spacing between the plurality of tubes, the wire cables, and the subsequent insertion wire cables, and the spacing from the protective tube, can be uniformly / preferably arranged. Accordingly, the insulation and waterproofing properties of the integrated pipe can be prevented from being secured biasedly and can be uniformly secured.

[0020] In addition, according to an embodiment of the present invention, by making the thickness of the pair of plate-shaped insulation materials different depending on the configuration and diameter difference of the plurality of tubes, the wire cable, and the post-injection wire cable, the waterproofing and heat insulation properties of the integrated pipe can be improved.

[0021] FIG. 1 is a perspective view of an integrated pipe according to one embodiment of the present invention.

[0022] Figure 2 is a half-sectional perspective view of an integral pipe according to one embodiment of the present invention.

[0023] Figure 3 is a process diagram showing each step of the process for manufacturing the above-mentioned integrated pipe.

[0024] Figure 4 is a process diagram for manufacturing the above-mentioned integrated pipe.

[0025] Figure 5 is a perspective view of the entire manufacturing device for manufacturing the above-mentioned integrated pipe.

[0026] Figure 6 is a perspective view of the manufacturing device showing the state in which the frame of the manufacturing device is removed.

[0027] Figure 7 is a cross-sectional side view of the above manufacturing device.

[0028] FIG. 8 is a cross-sectional view of an integral pipe produced according to a number of embodiments.

[0029] Hereinafter, embodiments are described in detail with reference to the attached drawings. However, the embodiments may be modified in various ways, and the scope of the patent application is not limited or restricted by these embodiments. It should be understood that all modifications, equivalents, or alternatives to the embodiments are included within the scope of the patent application.

[0030] Specific structural or functional descriptions of the embodiments are disclosed for illustrative purposes only and may be modified and implemented in various forms. Accordingly, the embodiments are not limited to the specific disclosed form, and the scope of this specification includes modifications, equivalents, or alternatives that fall within the technical concept.

[0031] Although terms such as "first" or "second" may be used to describe various components, these terms should be interpreted solely to distinguish one component from another. For example, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component.

[0032] When it is said that a component is "connected" to another component, it should be understood that it may be directly connected or connected to that other component, but there may also be other components in between.

[0033] The terms used in the examples are for illustrative purposes only and should not be construed as limiting. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as "comprise" or "have" are intended to indicate the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but should be understood to not preclude the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0034] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which the embodiments pertain. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and shall not be interpreted in an idealized or overly formal sense unless explicitly defined herein.

[0035] In addition, when describing with reference to the attached drawings, identical components will be assigned the same reference numerals regardless of the drawing numbers, and redundant descriptions thereof will be omitted. When describing embodiments, if a detailed description of a related known technology is judged to unnecessarily obscure the gist of the embodiment, the detailed description will be omitted.

[0036] The advantages and features of the present invention, and the methods for achieving them, will become clearer with reference to the embodiments described in detail below together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms. These embodiments are provided solely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined solely by the scope of the claims.

[0037] In the embodiments of the present invention, unless otherwise defined, all terms, including technical or scientific terms, used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and shall not be interpreted in an idealized or overly formal sense unless explicitly defined in the embodiments of the present invention.

[0038] The shapes, sizes, ratios, angles, numbers, etc. disclosed in the drawings for explaining embodiments of the present invention are exemplary, and therefore the present invention is not limited to the matters illustrated. In addition, in describing the present invention, if it is determined that a detailed description of a related known technology may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. When the terms “includes,” “has,” and “consists of” are used in this specification, other parts may be added unless “only” is used. When a component is expressed in the singular, it includes a case where the plural is included unless there is a specifically explicit description.

[0039] When interpreting a component, it is interpreted as including the error range even if there is no separate explicit description.

[0040] When describing a positional relationship, for example, when the positional relationship between two parts is described as 'on top of', 'upper part of', 'lower part of', 'next to', etc., one or more other parts may be located between the two parts, unless 'right away' or 'directly' is used.

[0041] When elements or layers are referred to as being "on" another element or layer, this includes both directly on the other element or layer, or intervening layers or elements. Like reference numerals throughout the specification refer to like elements.

[0042] The size and thickness of each component shown in the drawing are shown for convenience of explanation, and the present invention is not necessarily limited to the size and thickness of the component shown.

[0043] The individual features of the various embodiments of the present invention can be partially or wholly combined or combined with each other, and as can be fully understood by those skilled in the art, various technical connections and operations are possible, and each embodiment can be implemented independently of each other or can be implemented together in a related relationship.

[0044] Fig. 1 is a perspective view of an integrated pipe according to one embodiment of the present invention. Fig. 2 is a half-sectional perspective view of an integrated pipe according to one embodiment of the present invention.

[0045] Referring to FIGS. 1 and 2, an integrated pipe (1) according to one embodiment of the present invention may include a protective tube (10) formed of molten synthetic resin, a plurality of tubes (20), one or more wire cables (30), and an insulating material (40) positioned inside the protective tube (10) and wrapping the tubes (20) and the wire cables (30).

[0046] The above protective tube (10) can safely protect the tube (20) and the wire cable (30) from external foreign substances or external force by wrapping and accommodating the outside of the insulating material (40). The protective tube (10) can be made of extruded and molded polyethylene and can have a seamless structure.

[0047] In addition, the protective tube (10) may be made of a flexible material. That is, even if the integrated pipe (1) is bent by an external force, it can be bent flexibly without being broken.

[0048] The above tube (20) is a tube through which refrigerant gas or a heating and cooling medium flows, and may be composed of a copper pipe or an aluminum alloy pipe. For example, the tube (20) may be composed of a high-pressure tube through which the refrigerant of the heating and cooling system flows at high pressure, and a low-pressure tube through which the refrigerant of the heating and cooling system flows at low pressure.

[0049] The drawing shows that there are two tubes (20), but there may be one or three or more.

[0050] The above-mentioned wire cable (30) may be a power and control cable in which the wire and communication line are integrated with a covering. The above-mentioned wire cable (30) may be provided in one or two or more pieces.

[0051] The later-described post-injection wire cable (35) is a type of the above-described wire cable (30), and can be understood to have a different drawing number to distinguish it from the wire cable (30) that is pressed together between a pair of plate-shaped insulators (40) to be described later.

[0052] The above insulation material (40) preferably uses a cross-linked foam material, and may be configured using, for example, a cross-linked foamed polyolefin foam. The tube (20) and the wire cable (30) can be protected from the outside by the insulation material (40), and heat exchange between the plurality of tubes (20) and the wire cable (30) can be effectively prevented while maintaining a spaced state between the plurality of tubes (20).

[0053] In the above integrated pipe (1), the protective tube (10) is formed with a seamless structure, so that even when the integrated pipe (1) is bent by more than 90 degrees, the outer surface does not burst, and insulation and waterproofing can be safely secured.

[0054] In addition, the protective tube (10) may include peaks (12, 13) and valleys (11, 14) formed on the inner and outer surfaces. The insulating material (40) may include peaks (41) and valleys (42) formed on the outer surface corresponding to the peaks (13) and valleys (14) formed on the inner surface of the protective tube (10). At this time, the inner surface of the protective tube (10) is seamlessly fused with the outer surface of the insulating material (40), thereby stably preventing air and moisture from penetrating between the protective tube (10) and the insulating material (40). Therefore, the insulation and waterproofing properties of the integrated pipe (1) can be greatly improved.

[0055] In addition, the integrated pipe (1) may further include an adhesive layer (50) formed between the inner surface of the protective tube (10) and the outer surface of the insulating material (40). The adhesive layer (50) is formed by deforming a portion of the insulating material (40), and may be a layer formed by heat-fusing the inner surface of the protective tube (10) and the outer surface of the insulating material (40).

[0056] By fixing all surfaces where the protective tube (10) and the insulating material (40) come into contact with each other by the adhesive layer (50), the insulating material (40) can be prevented from being dislodged or separated.

[0057] In addition, since the integrated pipe (1) is formed integrally with the protective tube (10) and the insulation material (40) by the adhesive layer (50), the tube (20) and the wire cable (30) can be pulled out even when buried in a wall or slab of a building, making replacement and maintenance easy after construction.

[0058] Here, the protective tube (10) can be understood as a configuration formed by cooling an extruded material to be described later, and the insulating material (40) can be understood as a configuration formed by molding a pair of plate-shaped insulating materials (40a, 40b) to be described later. In addition, the insulating material (40) can accommodate the plurality of tubes (20), the wire cable (30), and the later-injected wire cable (35) therein.

[0059] Hereinafter, the above-mentioned integrated pipe (1) is one of the molded products and is indicated by drawing number P.

[0060] Figure 3 is a process diagram showing each molded product at each step of the process for manufacturing the above-mentioned integrated pipe. Figure 4 is a process diagram for manufacturing the above-mentioned integrated pipe. Figure 5 is a perspective view of the entire manufacturing apparatus for manufacturing the above-mentioned integrated pipe. Figure 6 is a perspective view of the manufacturing apparatus showing the state in which the frame of the manufacturing apparatus is removed. Figure 7 is a longitudinal side view of the above-mentioned manufacturing apparatus.

[0061] Referring to Fig. 3, an integrated pipe (P) according to one embodiment of the present invention can be completed by sequentially forming a first molded product (P1), a second molded product (P2), and a third molded product (P3). The second molded product (P2) can be obtained by additionally forming the first molded product (P1), the third molded product (P3) can be obtained by additionally forming the second molded product (P2), and the integrated pipe (P) can be obtained by additionally forming the third molded product (P3).

[0062] Referring to FIGS. 3(a) to 3(e), the first molded product (P1) can be formed by fusing the facing surfaces of a pair of plate-shaped insulating materials (40a, 40b) while placing the plurality of tubes (20) and the wire cables (30) between the pair of plate-shaped insulating materials (40a, 40b). Since the facing surfaces of the pair of plate-shaped insulating materials (40a, 40b) are fused while under pressure, the first molded product (P1) can be formed in a state where the outer peripheral surfaces of each of the plurality of tubes (20) and the wire cables (30) are in close contact with the pair of plate-shaped insulating materials (40a, 40b).

[0063] The above pair of plate-shaped insulation materials (40a, 40b) may include a first plate-shaped insulation material (40a) and a second plate-shaped insulation material (40b) positioned below the first plate-shaped insulation material (40a).

[0064] The second molded product (P2) can be formed to be curved to wrap around and accommodate the subsequent injection wire cable (35) while the subsequent injection wire cable (35) is placed on the upper side of the first molded product (P1).

[0065] At this time, the outer surface of the above-mentioned post-injection wire cable (35) may face one surface of the above-mentioned first molded product (P1), for example, the outer surface of the above-mentioned first plate-shaped insulation material (40a). The above-mentioned second molded product (P2) may be in a state where the outer surface of the above-mentioned post-injection wire cable (35) is in contact with the outer surface of the above-mentioned first plate-shaped insulation material (40a).

[0066] In addition, as the second molded product (P2) is molded, the first plate-shaped insulation material (40a) and the second plate-shaped insulation material (40b) can form an insulation material (40) that constitutes the outer surface and a portion of the interior of the second molded product (P2). That is, the insulation material (40) can form the periphery of the plurality of tubes (20), the wire cables (30), and the subsequent inserted wire cables (35), including the outer surface of the second molded product (P2).

[0067] In the state of the second molded product (P2), the plurality of tubes (20), the wire cable (30) and the subsequent inserted wire cable (35) are not exposed to the outside, so they can be primarily protected from external foreign substances, etc.

[0068] In addition, in the state of the second molded product (P2), the plurality of tubes (20), the wire cables (30), and the post-injection wire cables (35) can be maintained in a state of being spaced apart from each other by the insulation material (40). In other words, the insulation material (40) can be understood to be positioned in the area between the plurality of tubes (20), the wire cables (30), and the post-injection wire cables (35).

[0069] The third molded product (P3) can be molded to surround the outer surface of the second molded product (P2) and accommodate the second molded product (P2). Since the outer surface of the second molded product (P2) is not exposed to the outside in the state of the third molded product (P3), the second molded product (P2) can be protected from external foreign substances and moisture.

[0070] In addition, the outer surface of the third molded product (P3) may be defined as the outer surface of an extruded product, which will be described later. The outer surface of the extruded product may be further molded to become the outer surface of the protective tube (10). In other words, the third molded product (P3) may be understood as containing the second molded product (P2) within the extruded product.

[0071] The third molded product (P3) can be formed into a seamless structure as described above.

[0072] The above-mentioned integral pipe (P) may be a final molded product formed so that the inner and outer peripheral surfaces of the extruded material among the third molded product (P3) form hills (12, 13) and curved sections (11, 14). At this time, the integral pipe (P) may have hills (12, 13, 41) and curved sections (11, 14, 42) on both the inner and outer peripheral surfaces of the protective tube (10) and the outer peripheral surface of the insulating material (40). That is, the inner peripheral surface of the protective tube (10) and the outer peripheral surface of the insulating material (40) may be understood to be in a state of being fused together without a gap.

[0073] Referring to FIG. 4, a manufacturing device for manufacturing an integral pipe (P) according to one embodiment of the present invention may include a first molding machine (100), a post-injection machine (200), a second molding machine (300), a third molding machine (400), an extruder (500), a fourth molding machine (600), and a drawing machine (700).

[0074] At this time, the first molding machine (100), the post-injection machine (200), the second molding machine (300), the third molding machine (400), the fourth molding machine (600), and the extractor (700) may be provided in multiple units, and the extruder (500) may be provided in single units to supply molten synthetic resin to the multiple second molding machines (300).

[0075] In another embodiment, the manufacturing device may further include a pretreatment device (250) for pretreatment of the post-injection wire cable (35) fed into the post-injection device (200). The pretreatment device (250) may be a device that forms a heat-resistant coating layer (not shown) on the outer surface of the post-injection wire cable (35).

[0076] The above-described post-injection wire cable (35) that has passed through the above-described pretreatment device (250) can be prevented from being damaged on the outer surface by the coating layer even if it passes through the second heating unit (340) described later.

[0077] Referring to FIGS. 5 to 7, the first molding machine (100) may include a first frame (101), a first heating unit (120) for heating the plate-shaped insulating material (40a, 40b), a conveying roller (110), a pressure roller (130), and a first guide roller (140) rotatably supported on the first frame (101), a second guide roller (160) for supporting the tube (20) and the wire cable (30), and a third guide roller (170) for supporting the pair of plate-shaped insulating materials (40a, 40b).

[0078] The above-mentioned transport rollers (110) are provided in multiple pairs, one above the other, and can be provided in multiple numbers in the transport flow of the tube (20) and the wire cable (30). The above-mentioned transport rollers (110) can include guide grooves (111, 112, 113) corresponding to the outer circumferences of the tube (20) and the wire cable (30), respectively, to facilitate transport of the tube (20) and the wire cable (30).

[0079] The first heating unit (120) is positioned in front (upstream) of the pressure roller (130) in the transport flow of the tube (20) and the wire cable (30), and can heat the facing surfaces of the pair of plate-shaped insulating materials (40a, 40b). The facing surfaces of the pair of plate-shaped insulating materials (40a, 40b) can be brought into a molten state by the first heating unit (120).

[0080] For example, the first heating unit (120) may be configured as a heating nozzle that sprays hot air.

[0081] The second guide roller (160) is positioned in front (upstream) of the transport roller (110) in the transport flow of the tube (20) and the wire cable (30), and can support the tube (20) and the wire cable (30) from below. The plurality of tubes (20) and the wire cable (30) can sequentially pass between the second guide roller (160) and the transport roller (110) and between the pressure roller (130).

[0082] The third guide roller (170) is positioned in pairs, one upper and one lower, respectively, on the upper and lower sides of the transport roller (110), and can support each of the pair of plate-shaped insulating materials (40a, 40b). The pair of plate-shaped insulating materials (40a, 40b) can be stably transported and supplied by the third guide roller (170).

[0083] The first guide roller (140) may be configured to invert the pair of plate-shaped insulating materials (40a, 40b) (see FIG. 6) and feed them between the pressure rollers (130). That is, the first guide roller (140) may be configured as an upper and lower pair and may be arranged on the upper and lower sides of the pressure roller (130).

[0084] The above-mentioned pressure roller (130) is composed of an upper and lower pair, and can pressurize the facing surfaces of the pair of plate-shaped insulating materials (40a, 40b). As it passes through the pressure roller (130), the first molded product (P1) can be molded.

[0085] A pressure guide groove (not shown) is formed in the above pressure roller (130), and the tube (20) and the wire cable (30) can be pressed in a convexly protruding state by the pressure guide groove.

[0086] That is, the above-mentioned pressurized guide groove can be formed to correspond to each of the plurality of tubes (20) and the wire cables (30).

[0087] The above-described post-injection device (200) may include an injection frame (201), an injection transfer roller (210) rotatably installed on the injection frame (201), and an injection guide roller (220) that guides the post-injection wire cable (35) to be introduced to the upper side of the first molded product (P1).

[0088] The above-mentioned input guide roller (220) can be rotatably installed on the input frame (201). The above-mentioned input guide roller (220) can guide the above-mentioned subsequent input wire cable (35) to be placed at a set position on the upper side of the first molded product (P1). The set position will be described later.

[0089] The second molding machine (300) may include a second frame (301), a first curved roller (310) installed on the second frame (301) and sequentially curved the first molded product (P1) into a semicircle, a C-shape, and a round bar shape, a second curved roller (320), a third curved roller (330), and a second heating unit (340) that heats the upper surface of the first molded product (P1).

[0090] The first curved roller (310), the second curved roller (320), and the third curved roller (330) may have curved grooves (not shown). The first curved roller (310), the second curved roller (320), and the third curved roller (330) may be defined as 'curved rollers'. That is, the curved rollers may include the first to third curved rollers (310, 320, 330).

[0091] The second heating unit (340) can melt the upper surface of the first molded product (P1) and maintain the curved state after passing through the first curved roller (310), the second curved roller (320), and the third curved roller (330).

[0092] The second molding machine (300) may further include an additional heating unit (350) positioned at the rear (downstream) of the curved roller and configured to heat a portion of the outer surface of the second molded product (P2). The additional heating unit (350) may heat an area where both ends of the first molded product (P1) meet (join) in preparation for a case where both ends of the first molded product (P1) are not properly melted. That is, the additional heating unit (350) may be positioned close to an area where the first molded product (P1) is curved and where both ends of the first molded product (P1) meet (join).

[0093] Accordingly, by ensuring that there is no gap that is not bonded to the outer surface of the second molded product (P2) by the additional heating unit (350), the molding state of the second molded product (P2) can be improved.

[0094] The third molding machine (400) may include a cylindrical cooling jacket (410) forming a central path through which the second molded product (P2) passes and through which cooling water circulates, and an extrusion die (420) surrounding the outer periphery of the cylindrical cooling jacket (410) and forming an annular extrusion opening (421) on the outer periphery side of the tip end of the cylindrical cooling jacket (410).

[0095] A cooling water circulation pipe (411) can be connected and installed in the above cooling jacket (410).

[0096] The third molded product (P3) can be molded while passing through the third molding machine (400). The third molded product (P3) can be understood as an extruded product, which will be described later, molded by injecting molten synthetic resin into the outer surface of the second molded product (P2).

[0097] The extruder (500) can be connected to the extrusion die (420) through a connecting pipe (510). The extruder (500) can supply molten synthetic resin to the extrusion die (420) through the connecting pipe (510).

[0098] The fourth molding machine (600) may include a fourth frame (601), a spiral die (610) rotatably installed on the fourth frame (601), a sleeve (620) that seals the outer circumference of the spiral die (610), and a vacuum pipe (630) connected to the outer circumference of the sleeve (620).

[0099] A path through which the second molded product (P2) that has passed through the third molding machine (400) passes may be formed in the spiral die (610). In addition, a spiral ridge (611) and a spiral valley (612) may be formed on the inner circumferential surface of the spiral die (610).

[0100] The diameter (inner diameter) of the path entrance of the above spiral die (610) can be formed to be smaller than the diameter of the annular extrusion hole (421) of the above extrusion die (420).

[0101] The above vacuum pipe (630) may be configured in multiple pieces so that vacuum pressure is uniformly applied across the entire outer surface of the third molded product (P3) passing through the fourth molding machine (600).

[0102] The above-mentioned extractor (700) may include an extract roller (710) rotatably installed on the extract frame (701) to extract the completed integral pipe (P) while passing through the extract frame (701) and the fourth forming machine (600).

[0103] Hereinafter, a manufacturing method for manufacturing an integral pipe according to an embodiment of the present invention will be described. Referring to FIGS. 3 to 7, the manufacturing method for manufacturing an integral pipe according to an embodiment of the present invention may include a first forming step (S100), an additional injection step (S150), a second forming step (S200), a third forming step (S300), a fourth forming step (S400), and a withdrawal step (S500).

[0104] Specifically, the first forming step (S100) may be a step of forming a first formed product (P1) by fusing the facing surfaces of the pair of plate-shaped insulating materials (40a, 40b) while transporting the plurality of tubes (20) and the wire cables (30) positioned between the pair of plate-shaped insulating materials (40a, 40b).

[0105] The first forming step (S100) may include a step of preparing each of the pair of plate-shaped insulating materials (40a, 40b) to be supported by the third guide roller (170) and inserted, and a step of preparing the plurality of tubes (20) and the wire cables (30) to be supported by the second guide roller (160) and passed through the transport roller (110).

[0106] The first molded product (P1) can be molded through the first molding step (S100). In the drawing, the plurality of tubes (20) and the wire cables (30) are shown as being introduced, but the number of tubes (20) and the number of wire cables (30) are not limited thereto.

[0107] The above-described additional input step (S150) may be a step of inputting the post-input wire cable (35) to the upper side of the first molded product (P1) that has passed through the first molding machine (100). In the above-described additional input step (S150), the post-input wire cable (35) is transported through the input transport roller (210) and can be stably inputted to the set position by the input guide roller (220).

[0108] In the drawing, the above-mentioned post-injection wire cable (35) is depicted as being one, but this is not limited thereto. As another example, the above-mentioned post-injection wire cable (35) may be two or more, and in this case, each of the two or more post-injection wire cables (35) may be introduced into each set position by the above-mentioned input guide roller (220).

[0109] The above manufacturing method may further include a pretreatment step (S130) of pretreating the post-injection wire cable (35) before the additional injection step (S150). In the pretreatment step (S130), the outer circumference of the post-injection wire cable (35) may be protected by the coating layer.

[0110] The second molding step (S200) may be a step of sequentially bending the upper surface of the first molded product (P1) (for example, the upper surface of the first plate-shaped insulating material (40a)) into a semicircle, a C-shape, and a round bar shape while transporting the first molded product (P1). That is, in the second molding step (S200), the first molded product (P1) may sequentially pass through the second heating unit (340), the first curved roller (310), the second curved roller (320), and the third curved roller (330).

[0111] The second molded product (P2) can be molded by the second molding step (S200). That is, the first molded product (P1) can be molded so that the subsequent input wire cable (35) is placed on the upper side of the first molded product (P1) and the first molded product (P1) is bent to wrap around and accommodate the subsequent input wire cable (35).

[0112] In addition, the second molding step (S200) may further include a step of additionally heating the area where the two ends of the first molded product (P1) meet (join) after passing through the curved roller. Through this, the joint area of ​​the two ends of the first molded product (P1) can be stably joined.

[0113] The third molding step (S300) may be a step of transporting the second molded product (P2), blocking the outer surface of the second molded product (P2) with the cooling jacket (410), and extruding a third molded product (P3) having a circular cross-section that surrounds the second molded product (P2) from the outer surface of the cooling jacket (410). In the third molding step (S300), a molten synthetic resin may be supplied from the extruder (500) so that the molten synthetic resin may be molded into an extrudate on the outer surface of the second molded product (P2).

[0114] The above extruded material can be understood as a configuration that becomes the protective tube (10) through the fourth molding step (S400).

[0115] The third molded product (P3) can be molded by the third molding step (S300).

[0116] The fourth molding step (S400) may be a step of molding the hills (12, 13, 41) and the curved parts (11, 14, 42) onto the third molded product (P3) while transporting the third molded product (P3). The fourth molding step (S400) may be a step of rotating the molding die (610) while transporting the third molded product (P3), more precisely, the second molded product (P2), and the extrudate into the inside of the molding die (610), so that the outer surface of the second molded product (P2) is melted by the temperature of the extrudate, and the outer surface of the second molded product (P2) and the inner surface of the extrudate may be fused.

[0117] In addition, due to the temperature of the extrudate, a peak (41) and a curved portion (42) can be formed on the outer surface of the second molded product (P2), and peaks (12, 13) and curved portions (11, 14) can be formed on the inner and outer surfaces of the extrudate. In the fourth molding step (S400), a vacuum can be applied between the inner surface of the molding die (610) and the outer surface of the extrudate to perform molding.

[0118] Here, the outer surface of the second molded product (P2) can be understood as the outer surface of the insulation material (40) of the integrated pipe (1), and the inner and outer surfaces of the extruded product can be understood as the inner and outer surfaces of the protective tube (10) of the integrated pipe (1).

[0119] The above withdrawal step (S500) may be a step in which, after the integrated pipe (P) is completed, it is withdrawn by the withdrawal roller (710) and wound on a drum (not shown).

[0120] According to another embodiment of the present invention, a manufacturing method for manufacturing an integral pipe is the same as the manufacturing method described above, but differs only in that only the plurality of tubes (20) are pressurized by the pair of plate-shaped insulators (40a, 40b) and the number of the post-injection wire cables (35a, 35b) is plural. That is, the first molded product (P1) can be bent and formed into the second molded product (P2) while the plurality of post-injection wire cables (35a, 35b) are respectively placed at set positions on the upper side of the first molded product (P1).

[0121] According to another embodiment of the present invention, a manufacturing method for manufacturing an integral pipe is the same as the manufacturing method described above, except that only the plurality of tubes (20) are pressurized by the pair of plate-shaped insulating materials (40a, 40b). That is, the first molded product (P1) can be bent and formed into the second molded product (P2) while the one post-injection wire cable (35) is placed at a set position on the upper side of the first molded product (P1).

[0122] FIG. 8 is a cross-sectional view of an integral pipe produced according to a number of embodiments.

[0123] Referring to FIG. 8(a), an integrated pipe (P) according to one embodiment of the present invention can be configured by placing the plurality of tubes (20) and one wire cable (30) between the pair of plate-shaped insulating materials (40a, 40b) and then wrapping and bending one post-injection wire cable (35) after the pair of plate-shaped insulating materials (40a, 40b) is pressurized.

[0124] The above-described post-injection wire cable (35) can be inserted so as to be placed between the plurality of tubes (20) on the upper side of the first molded product (P1). That is, the setting position of the above-described post-injection wire cable (35) can be between the plurality of tubes (20) on the upper side of the first molded product (P1).

[0125] At this time, if the outer diameter (d3) of the above-mentioned post-injection wire cable (35) is larger than the outer diameter (d1, d2) of either of the two tubes (20), the thickness (t1) of the first plate-shaped insulation material can be formed to be larger than the thickness (t2) of the second plate-shaped insulation material.

[0126] When the first molded product (P1) is bent and formed into the second molded product (P2), the outer surface (upper surface) of the first plate-shaped insulating material (40a) comes into contact with the subsequently inserted wire cable (35), and the outer surface (lower surface) of the second plate-shaped insulating material (40b) forms the outer surface of the second molded product (P2). That is, a situation occurs in which the outer surface (lower surface) of the second plate-shaped insulating material (40b) is tensile compared to the first plate-shaped insulating material (40a).

[0127] In the case where the outer diameter (d3) of the above-described post-injection wire cable (35) is larger than the outer diameter (d1, d2) of either of the two tubes (20), by configuring the first plate-shaped insulation material (40a) to be thicker than the second plate-shaped insulation material (40b), even if the second plate-shaped insulation material (40b) does not completely wrap the above-described post-injection wire cable (35), the thickness of the first plate-shaped insulation material (40a) can be sufficiently compensated for.

[0128] On the other hand, when the outer diameter (d3) of the above-described post-injection wire cable (35) is smaller than the diameters (d1, d2) of the two tubes (20), the thickness (t2) of the second plate-shaped insulation material can be formed to be larger than the thickness (t1) of the first plate-shaped insulation material. Through this, compared to when the first and second plate-shaped insulation materials (40a, 40b) have the same thickness, the two tubes (20) can be positioned further inward from the protective tube (10), thereby further enhancing the insulation and waterproofing properties.

[0129] Referring to Fig. 8(b), an integrated pipe (P) according to another embodiment of the present invention can be formed by placing the plurality of tubes (20) between the pair of plate-shaped insulating materials (40a, 40b) and then pressurizing the pair of plate-shaped insulating materials (40a, 40b) and then wrapping and bending two subsequent injection wire cables (35a, 35b).

[0130] At this time, the two post-injection wire cables (35a, 35b) may have different diameters (outer diameters). The two post-injection wire cables (35a, 35b) may include a first post-injection wire cable (35a) and a second post-injection wire cable (35b) having a smaller diameter than the first post-injection wire cable (35a).

[0131] The first post-injection wire cable (35a) may be positioned between two tubes (20) on the upper side of the first molded product (P1), and the second post-injection wire cable (35b) may be positioned in the outer region of one of the two tubes (20) on the upper side of the first molded product (P1). That is, the setting position of the first post-injection wire cable (35a) may be between two tubes (20) on the upper side of the first molded product (P1) (inner region), and the setting position of the second post-injection wire cable (35b) may be in the outer region of one of the two tubes (20) on the upper side of the first molded product (P1).

[0132] Here, the outer region of one of the two tubes (20) can be understood as a region located in a direction away from both of the two tubes (20) on the upper side of the two tubes (20). Conversely, the inner region of the two tubes (20) can be understood as a region that satisfies the condition of being close to one of the two tubes (20) and far from the other on the upper side of the two tubes (20).

[0133] In addition, the thickness (t1) of the first plate-shaped insulation material (40a) can be formed to be greater than the thickness (t2) of the second plate-shaped insulation material (40b). Through this, even if the two post-injection wire cables (35a, 35b) are wrapped and curved, the gap between the two tubes (20) and the two post-injection wire cables (35a, 35b) can be prevented from becoming too close, and the gap can be formed to maintain a certain or greater distance.

[0134] Referring to Fig. 8(c), an integrated pipe (P) according to another embodiment of the present invention can be formed by wrapping and bending one post-injection wire cable (35) after the pair of plate-shaped insulators (40a, 40b) are pressurized while the plurality of tubes (20) are placed between the pair of plate-shaped insulators (40a, 40b).

[0135] Referring to FIGS. 8(a) to 8(c), when the first molded product (P1) is bent to become the second molded product (P2), the boundary line along which the outer surface (upper surface) of the first molded product (P1) is deformed is indicated by drawing number 45. However, when the outer surface (upper surface) of the first molded product (P1) is formed into the second molded product (P2) in a semi-molten state, the boundary line cannot actually be distinguished.

[0136] Although the embodiments of the present invention have been described in more detail with reference to the attached drawings, the present invention is not necessarily limited to these embodiments, and various modifications may be implemented without departing from the technical spirit of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain it, and the scope of the technical spirit of the present invention is not limited by these embodiments. Therefore, it should be understood that the embodiments described above are illustrative in all aspects and not restrictive. The protection scope of the present invention should be interpreted by the claims below, and all technical ideas within a scope equivalent thereto should be interpreted as being included in the scope of the rights of the present invention.

[0137] Therefore, other implementations, other embodiments, and equivalents to the claims also fall within the scope of the claims described below.

Claims

1. In an integral pipe formed by a first molded product in which a plurality of tubes are placed between a pair of plate-shaped insulating materials and the pair of plate-shaped insulating materials are pressurized, a second molded product in which the first molded product is bent to wrap the post-injection wire cable while positioning the post-injection wire cable on the upper side of the first molded product and has a round bar shape, and a third molded product in which an extruded product composed of a molten synthetic resin is wrapped around the outer surface of the second molded product, and thus hills and valleys are formed on the inner and outer surfaces of the extruded product and the outer surface of the second molded product, and the inner and outer surfaces of the extruded product and the outer surface of the second molded product are integrally fused together, An integrated pipe comprising a protective tube formed by cooling the extruded product, an insulating material formed by molding the pair of plate-shaped insulating materials and accommodating the plurality of tubes and the post-injection wire cables therein, and an adhesive layer formed between the inner surface of the protective tube and the outer surface of the insulating material.

2. In paragraph 1, There are multiple cables for the above-mentioned wires, The above plurality of post-injection wire cables include a first post-injection wire cable and a second post-injection wire cable having a smaller diameter than the first post-injection wire cable, The above first post-injection wire cable is positioned between the plurality of tubes on the upper side of the first molded product, The second post-injection wire cable is bent in a state where it is arranged in the outer region of one of the plurality of tubes on the upper side of the first molded product, The above pair of plate-shaped insulation materials includes a first plate-shaped insulation material whose upper surface contacts the above-mentioned post-injection wire cable, and a second plate-shaped insulation material located on the lower side of the first plate-shaped insulation material and forming the outer surface of the second molded product after being bent. An integrated pipe in which the thickness of the first plate-shaped insulation material is formed to be larger than the thickness of the second plate-shaped insulation material when the outer diameter of the above-mentioned inserted wire cable is larger than the outer diameter of any one of the above-mentioned plurality of tubes.

3. A first molding machine comprising a conveying roller for conveying a plurality of tubes, a pair of heating parts for heating facing surfaces of a pair of plate-shaped insulating materials, and a pressing roller for pressing the pair of plate-shaped insulating materials, wherein the first molding machine presses the pair of plate-shaped insulating materials while the plurality of tubes are interposed therebetween to produce a first molded product; A post-injection device that inserts a post-injection wire cable into a set position on the upper side of the first molded product; A second molding machine that sequentially bends the first molded product into a semicircle, a C-shape, and a round bar shape to produce a second molded product while the post-injection wire cable is positioned on the upper side of the first molded product; A third molding machine that creates a third molded product by injecting molten synthetic resin into the outer surface of the second molded product and molding the extruded product; An extruder that supplies the molten synthetic resin to the third molding machine; and Including a fourth molding machine that forms a spiral mountain and a groove in the third molded product to create an integrated pipe, The above-mentioned integrated pipe is a manufacturing device for an integrated pipe, comprising a protective tube formed by cooling the extruded material, an insulating material formed by molding the pair of plate-shaped insulating materials and accommodating the plurality of tubes and the post-injection wire cables therein, and an adhesive layer formed between the inner surface of the protective tube and the outer surface of the insulating material.

4. In paragraph 3, The above pair of plate-shaped insulation materials includes a first plate-shaped insulation material and a second plate-shaped insulation material positioned on the lower side of the first plate-shaped insulation material and forming an outer surface of the second molded product after curving, The second molded product is formed by melting the upper surface of the first plate-shaped insulation material, which is the upper surface of the first molded product, and the outer surface of the second molded product is in contact with the outer surface of the first plate-shaped insulation material. The above insulation material forms the periphery of the plurality of tubes and the post-injection wire cable, including the outer surface of the second molded product, After the above, the input wire cable has a heat-resistant coating layer formed on the outer surface, The above-mentioned post-injection wire cables are plural, and the plural post-injection wire cables include a first post-injection wire cable and a second post-injection wire cable having a smaller diameter than the first post-injection wire cable, The first post-injection wire cable is positioned between the plurality of tubes on the upper side of the first molded product, and the second post-injection wire cable is bent in a state where it is positioned in the outer region of one of the plurality of tubes on the upper side of the first molded product. An integrated pipe manufacturing device in which the thickness of the first plate-shaped insulation material is formed to be greater than the thickness of the second plate-shaped insulation material to prevent the gap between the plurality of subsequent input wire cables from becoming too close.

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