KR102575404B1 - Single-collar water supply and sewer pipes that compensate for the reduction in thickness due to expansion and their manufacturing methods - Google Patents

Abstract

The present invention relates to a single-collar type water supply and sewage pipe that compensates for the decrease in thickness due to pipe expansion and a method of manufacturing the same. More specifically, when pipe expansion is performed during the process of extruding the pipe, a certain number of pipes are provided to compensate for the decrease in thickness. A single-collar type water and sewage pipe that compensates for the decrease in thickness due to automatic expansion of the pipe and its manufacturing method, so that even if the thickness is reduced even when the pipe is expanded, it can be included in the normal specifications by adjusting the thickness in the section and forming it thicker than the standard thickness. It's about.
In the present invention, the water and sewage pipe made of an extruded pipe body is extruded so that the pipe body has a standard thickness within a range of a thickness molding width that is larger than the expansion portion, and in the process of extrusion molding to have the standard thickness, the water and sewer pipe is extruded The driving position is controlled by an inverter through a speed and pipe thickness control device, and extrusion molding is performed to have an adjusted thickness that is 1.1 to 1.5 times thicker than the standard thickness at the thickness molding width, and the width of the thickness control portion having the adjusted thickness is the packing. The groove and expansion groove should have an expansion portion formed to a thickness of 0.8 to 1.2 times the standard thickness;
The adjustable thickness is,
With respect to the standard thickness, drive the inverter to slow down the extrusion speed by 5 to 15% from 900 rpm to 790 to 830 rpm to extrude and mold a thickness of 10.3 mm thicker to a thickness of 11.1 to 11.9 mm in the thickness molding width of 220 to 240 mm. Including doing;
The thickness control unit,
At one end of the water and sewage pipe, it has an adjustable thickness of 11.1 to 11.9 mm compared to the standard thickness of 10.3 mm and a thickness molding width of 220 to 240 mm, and includes the expansion of the pipe in a single-collar type within the thickness molding width. and;
The expansion part is,
It consists of a packing groove into which the watertight packing is inserted and an expansion groove into which the tube body is inserted;
The watertight packing forms a groove inclined surface in contact with the packing groove on the outer diameter, forms a groove contact part in the transverse direction at the end of the groove inclined surface, and forms an internal groove inclined surface inward from the end of the groove contact part, and then forms an inner groove inclined surface inward at the end of the internal groove inclined surface. In the inner watertight protrusion obliquely protrudes in the outer direction, a guide inclined surface is formed from the groove inclined surface to the inner diameter, and then a fixed protrusion and an internal watertight protrusion formed in the inner diameter direction from the inside of the inner protrusion at regular intervals inside the guide inclined surface. The protrusions are characterized by being connected by connecting slopes.

Description

Single-collar water supply and sewer pipes that compensate for the reduction in thickness due to expansion and their manufacturing methods}

The present invention relates to a single-collar type water supply and sewage pipe that compensates for the decrease in thickness due to pipe expansion and a method of manufacturing the same. More specifically, when pipe expansion is performed during the process of extruding the pipe, a certain number of pipes are provided to compensate for the decrease in thickness. A single-collar type water and sewage pipe that compensates for the decrease in thickness due to automatic expansion of the pipe and its manufacturing method, so that even if the thickness is reduced even when the pipe is expanded, it can be included in the normal specifications by adjusting the thickness in the section and forming it thicker than the standard thickness. It's about.

Pipe joints for water and sewerage require not only robustness but also ease of construction. In general, pipes for water and sewerage are cut to a length of about 6m for easy handling, and are arranged in the required shape at the site according to the direction of the water and sewage pipes. Socket, reducer, tee. Water and sewage pipes have been connected by welding, screwing, or force fitting using elbows.

The joint work of water and sewage pipes using the above-mentioned method has the advantage of being sturdy, but it has been exposed to various problems, such as significantly lower workability, cracks easily occurring at the welded area, and water leakage due to corrosion.

Furthermore, if the above-mentioned problem occurs in a water pipe through which drinking water passes, hygienic problems such as contamination with heavy metals will occur, and if it occurs in a sewer pipe, the surrounding ground will be contaminated, ultimately causing groundwater contamination.

In addition, a thermal expansion coefficient occurs in which the length of water and sewer pipes contracts or expands due to temperature deviations due to climate change, and a problem arises in that it cannot properly respond to the flow of water and sewer pipes caused by external shocks and earthquakes.

In addition to this connection structure, a method using rubber packing is widely used as a method of connecting water and sewage pipes, but problems arise in which the water and sewage pipes separate from the rubber packing due to external force in the horizontal or vertical direction or due to the thermal expansion coefficient.

In addition, in order to maintain watertightness by applying rubber packing, water and sewage pipes of various structures are first extruded to complete the shape of the straight pipe, and afterward, expansion work is performed to insert the packing. In the process of performing this, heat is applied to the inner and outer diameters of the synthetic resin pipe, and then the pipe diameter is enlarged using a mold to create a configuration in which a portion of the tip of the synthetic resin pipe and packing are inserted. This combination creates a watertight connection at the one-sided collar type connection. can be maintained.

However, in the case of extrusion molding of straight pipe, the thickness is ISO 1452-2 or water pipe (KS M 3401, the pipe wall thickness at any point of the socket except the groove must not be less than the minimum pipe wall thickness of the pipe). It is molded to maintain the thickness of the required standard, but as the work of expanding one end into a single collar shape increases the diameter of the pipe, the thickness becomes thinner, making it impossible to maintain the thickness of the required standard, so various tests are performed. In the process, a defect occurs in which the expanded pipe swells and eventually breaks, making it impossible to pass the test. In order to meet the standard, the overall thickness must be increased, which reduces competitiveness due to an increase in cost. It happened.

[Document 1] Patent Registration No. 1011018 (registered on January 19, 201) [Document 2] Patent Registration No. 1183606) (Registered on September 11, 2012) [Document 3] Patent Registration No. 1562936 (registered on October 19, 2015) [Document 4] Patent Registration No. 0854316 (registered on August 20, 2008)

Therefore, it was devised to solve these conventional shortcomings, and the purpose of the present invention is to allow the length and thickness to be freely adjusted in a certain section of the water and sewage pipe extrusion process.

Another problem to be solved by the present invention is to expand the extruded water and sewage pipe by heating the expansion part so that packing and the pipe body can be inserted, and to strengthen the pressure by ensuring that the thickness of the expanded part meets the standard. .

Another problem solved by the present invention is to control various thicknesses and widths by controlling the speed of the inverter through a pipe thickness width control device to adjust the thickness in the process of forming water and sewage pipes.

The present invention extrudes a water supply and sewage pipe made of a pipe body to be extruded so that it has a standard thickness of the pipe body within a range of a thickness molding width that is larger than the expansion portion, and in the process of extrusion molding to have the standard thickness, the extrusion speed and the driving position is controlled by an inverter through a pipe thickness width adjustment device, so that the thickness molding width is extruded to have an adjusted thickness that is 1.1 to 1.5 times thicker than the standard thickness, and the width of the thickness adjustment portion having the adjusted thickness is the packing groove. It shall have an expansion portion formed in the expansion groove to a thickness of 0.8 to 1.2 times the standard thickness;
The adjustable thickness is,
With respect to the standard thickness, drive the inverter to slow down the extrusion speed by 5 to 15% from 900 rpm to 790 to 830 rpm to extrude and mold a thickness of 10.3 mm thicker to a thickness of 11.1 to 11.9 mm in the thickness molding width of 220 to 240 mm. Including doing;
The thickness control unit,
At one end of the water and sewage pipe, it has an adjustable thickness of 11.1 to 11.9 mm compared to the standard thickness of 10.3 mm and a thickness molding width of 220 to 240 mm, and includes the expansion of the pipe in a single-collar type within the thickness molding width. and;
The expansion part is,
It consists of a packing groove into which the watertight packing is inserted and an expansion groove into which the tube body is inserted;
The watertight packing forms a groove inclined surface in contact with the packing groove on the outer diameter, forms a groove contact part in the transverse direction at the end of the groove inclined surface, and forms an internal groove inclined surface inward from the end of the groove contact part, and then forms an inner groove inclined surface inward at the end of the internal groove inclined surface. In the inner watertight protrusion obliquely protrudes in the outer direction, a guide inclined surface is formed from the groove inclined surface to the inner diameter, and then a fixed protrusion and an internal watertight protrusion formed in the inner diameter direction from the inside of the inner protrusion at regular intervals inside the guide inclined surface. The protrusions are characterized by being connected by connecting slopes.

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A raw material preparation and supply step of mixing and preparing raw materials for extrusion molding the water and sewage pipe of the present invention and then supplying them to an extruder; A water and sewage pipe extrusion step of melting and molding the raw materials supplied to the extruder and extruding the water and sewage pipes; A water and sewer pipe cooling step of forming the extruded water and sewer pipes to be cooled in a cooler during the supply process; A water and sewer pipe thickness control step of adjusting the thickness to have a standard thickness and an adjusted thickness by controlling the extrusion molding speed in the extruder to the take-off while supporting the cold-molded water and sewage pipe in a track shape from the upper and lower sides; A cutting step of cutting water and sewer pipes to a predetermined length with a cutter so that one end has a thickness molded width during the process of extruding and forming the water and sewer pipes; When the cut end of the water supply and sewage pipe first touches the movement detection roller of the pipe thickness width control device of the discharge device, a signal is sent to the inverter through the movement detector, and the production speed is slowed to have the standard thickness, so that the standard thickness is set at the thickness forming width. When the detection roller is touched a second time, a signal is sent to the inverter through the standard detector to increase the speed of production to have an adjustable thickness, and extrusion molding to have a standard thickness, thereby controlling the thickness and width of the water supply and sewage pipe having a thickness control unit; A water and sewer pipe discharge step of adjusting the thickness and width of the water and sewer pipes and discharging them after they are cut and supplied; Including,
In the water and sewer pipe thickness control step, an inverter is installed in the take-off machine and the take-off speed of the water and sewer pipe is slowed down by 5 to 15% through a pipe thickness width control device, so that the thickness forming width of 220 to 240 mm is 1.1 to 1.5 times more than the standard thickness. Including extruding a thick controlled thickness;
In the step of adjusting the water and sewage pipe thickness, the extrusion speed of 900 rpm, which was produced to have a standard thickness, is further slowed down by 5 to 15% to 790 to 830 rpm, so that the thickness of 10.3 mm in the thickness molding width of 220 to 240 mm is 11.1 to 11.9 mm. It is extruded and molded to be 1.1 to 1.5 times thicker so as to have a movable table, and the movable table is connected to the width adjustment bar horizontally connecting the pillar connecting bars installed on the upper side of the pillars installed at regular intervals through a movable fixing handle, and is moved to the lower side of the movable table. A movement sensor having a movement detection roller that makes the first touch to adjust the thickness of the water and sewer pipe, and a standard bar movably coupled to the width adjustment bar adjust the width of the movement detector and the reference detector through a standard fixing handle to form the thickness. It is installed to have a width and consists of a standard detector with a standard detection roller that touches the lower side of the standard table for the second time so that the water and sewage pipe has a standard thickness of 10.3 mm.

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The present invention provides the effect of allowing the desired length and thickness to be freely adjusted using a pipe thickness width adjustment device after determining the required section in the water and sewage pipe extrusion process.

In the present invention, the extruded water and sewer pipe is expanded so that packing and the pipe body can be inserted after heating the expansion part. Although the thickness of the expanded portion is thinner than the extruded thickness, it is 0.8 times or thicker than the standard thickness and meets the standard. This improves quality and rigidity and provides the effect of strengthening pressure.

The present invention controls the speed of the inverter through a pipe thickness width control device to adjust the thickness in the process of forming water and sewage pipes, so that even when expanding the pipe by adjusting various thicknesses and widths compared to the standard thickness, the thinned thickness is less than the standard value. It provides an effect that is automatically molded so that it can be used.

1 is a front view of a forming device for water and sewage pipes showing a preferred embodiment of the present invention.
Figure 2 is a plan view of the pipe thickness width adjustment device applied to the water and sewage pipe forming device of the present invention.
Figure 3 is a plan view of the pipe thickness width adjusting device of the present invention
Figure 4 is a front view of the pipe thickness width adjusting device of the present invention
Figure 5 is a cross-sectional view of the water and sewage pipe of the present invention in an extruded state
Figure 6 is an enlarged cross-sectional view of the thickness and molded width of the water and sewer pipe of the present invention in an extruded state
Figure 7 is an enlarged cross-sectional view of the thickness and width of the water and sewage pipe of the present invention in an expanded state.
Figure 8 is a perspective view of the separated packing of the water and sewage pipe expansion part of the present invention
Figure 9 is a cross-sectional view before connecting the pipe body to the water and sewage pipe expansion part of the present invention
Figure 10 is a cross-sectional view after connection to the water and sewage pipe expansion part of the present invention
Figure 11 is an enlarged cross-sectional view of the main part of the water and sewage pipe expansion part of the present invention
Figure 12 is an enlarged cross-sectional view of the main part of the packing inserted into the water and sewage pipe expansion part of the present invention
Figure 13 is a block diagram showing the most preferred embodiment of the present invention.

Regarding the embodiments of the present invention posted in the text, specific structural and functional descriptions are merely illustrative for the purpose of explaining the embodiments of the present invention, and the embodiments of the present invention may be implemented in various forms. It should not be construed as limited to the embodiments described in.

Since the present invention can be subject to various changes and can have various forms, specific embodiments will be illustrated in the drawings and described in the text. However, this is not intended to limit the present invention to a specific disclosed form, and should be understood to include all changes, equivalents, and substitutes included in the design and technical scope of the present invention. While describing each drawing, similar reference numbers are used for components.

Terms such as first, second, etc. may be used to describe various components, but the components should not be limited by the terms. Terms described in the present invention are used only for the purpose of distinguishing one component from another component. For example, a first component may be named a second component, and may similarly be named a second component, without departing from the scope of the present invention.

When a component is referred to as being "connected to" or "installed on" another component, it may be directly connected to or installed on that other component. It should be understood that other components may exist in the middle.

The terminology used in this application is only used to describe specific embodiments and is not intended to limit the invention. The singular surface includes the plurality of surfaces unless the context clearly dictates otherwise. In this application, Terms such as "include" or "have" designate the existence of a described feature, number, step, operation, component, part, or combination thereof, and do not include one or more other features or numbers. It should be understood that this does not preclude the existence or addition of steps, operations, components, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by a person of ordinary skill in the technical field to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having meaning and understanding in the context of the related technology, and should not be interpreted in an ideal or excessively formal sense unless clearly defined in the present application. No.

Hereinafter, the main configuration and specific contents of the present invention will be described in detail through the attached drawings.

Figure 1 is a front view of a water and sewage pipe forming device showing a preferred embodiment of the present invention, and Figure 2 is a plan view showing a pipe thickness and width adjustment device applied to the water and sewage pipe forming device of the present invention.

An extruder 50 that prepares raw materials for extruding the water and sewage pipes 10, supplies them in powder form, and melts and extrudes them;

a cooler 51 that cools the water and sewage pipes 10 extruded from the extruder 50 by contacting air or water;

It includes a take-off device 52 that adjusts the production speed along with the thickness by controlling the pulling speed while rotating the water supply and sewage pipe 10 cooled in the cooler 51 by pressing a portion of the outer diameter from the upper and lower sides or both sides. .

An inverter (52a) is installed in the take-off device (52) to adjust the thickness and pulling speed of the water and sewage pipe (10) to control the thickness in a certain section, and the inverter (52a) controls the width of the pipe thickness at the rear. It includes allowing the driving position to be adjusted through the device 30.

A cutter 53 that cuts the water supply and sewage pipe 10 supplied through the take-off machine 52 to a certain length (about 6 meters);

It includes a discharge device 54 that allows the water and sewage pipes 10 cut or produced by the cutter 53 to be discharged by supporting the discharge roller 55 from the lower side.

In one part of the discharge device 54, the thickness forming width (H) can be freely adjusted by automatically controlling the inverter (52a) by detecting the part that reaches a certain width from the point where the tip of the water supply and sewage pipe (10) is first detected. It includes a pipe thickness width adjustment device (30) that allows.

Figure 3 is a plan view of the pipe thickness and width adjusting device of the present invention, and Figure 4 is a front view of the pipe thickness and width adjusting device of the present invention.

The pipe thickness and width adjustment device 30 installed in one part of the discharge device 54 detects the first touch to the tip of the pipe body 11 of the water and sewage pipe 10 during the extrusion process and slows down the withdrawal speed. It is advisable to install it so that it can be adjusted and the withdrawal speed can be adjusted to normal by detecting a second touch on the tip after it is molded to a thicker thickness at regular intervals.

The pipe thickness width adjustment device 30 adjusts the column 31 at regular intervals to touch the tip of the pipe body 11 in the first and second steps, and a column connection bar 33 is installed at the upper end of the column 31. ) is installed and connected to the width adjuster (32) in the horizontal direction, and then installed so that the column (31) and the width adjuster (32) can be fixed using the adjuster fixing handle (34) and the column fixing handle (35). Includes.

A standard bar 35 is coupled to the width adjuster 32 so that the position can be fixed with a standard fixing handle 36, and a standard detector 37 is installed on the standard bar 35 to detect the standard downward. It includes installing a roller (38) to detect a secondary touch to the pipe body (11) of the water supply and sewage pipe (10).

The moving table 40, which is installed at a certain distance from the standard table 35 to adjust the thickness forming width (H), can be fixed in position with a movable fixing handle 41, and the moving table 40 It includes installing a movement sensor 42 and installing a movement detection roller 43 on the lower side to detect the first touch to the pipe body 11 of the water supply and sewage pipe 10.

In the present invention, the standard for water pipes of 150 mm (PN 16) is shown in Table 1 below.

division unit standard control note thickness mm 10.3 11.1~11.9 Thickness before joint forming Extrusion speed rpm 900 790~830 Take-off control box Molding width mm - 220~240 -

Figure 5 is a cross-sectional view of the water and sewer pipe of the present invention in an extruded state, Figure 6 is an enlarged cross-sectional view of the thickness and molded width of the water and sewer pipe of the present invention in an extruded state, and Figure 7 is a cross-sectional view of the water and sewer pipe of the present invention in an expanded state. An enlarged cross-sectional view of the thickness and molded width, Figure 8 is a perspective view of the separated packing for the water and sewer pipe expansion part of the present invention, Figure 9 is a cross-sectional view before the pipe body is connected to the water and sewer pipe expansion part of the present invention, and Figure 10 is an expanded water and sewage pipe pipe of the present invention. This shows a cross-sectional view after the pipe body is connected to the pipe part.

The water supply and sewage pipe 10, which is made of a pipe body 11 that is extruded to have a single layer and a double or triple structure, has a width greater than that of the expanded pipe 12. The standard thickness of the pipe body 11 within the range of the thickness molding width (H). It involves extrusion molding an adjustable thickness (T) that is 1.1 to 1.5 times thicker based on (t).

When the range of the thickness forming width (H) is set, the thickness forming width (H) and the adjustable thickness (T) include those that can be freely adjusted.

The water supply and sewage pipe 10 is used in a straight pipe state by extrusion molding the pipe body 11 including the thickness adjusting part 14 and then cutting and supplying it at regular intervals, or in the form of a single collar for expanding the thickness adjusting part 14. It is desirable to use it after post-processing.

When expanding the thickness control part 14, the outer diameter is heated at a width shorter than the width of the thickness molding width (H), the inner diameter is heated again, and then the expansion mold is supplied to the inner diameter to expand the expansion part 12. By performing the operation, the packing groove 15 and the internal fastening groove 16 into which the watertight packing 20 is inserted are formed at the tip portion, and at the same time, the expansion groove 13 into which the tube body 11 is inserted and coupled is molded into one piece. It includes

In the packing groove 15, the groove inclined surface 21 of the watertight packing 20, the groove contact part 22, and the internal groove inclined surface 23 are in contact, and the internal fastening groove 16 has an internal watertight protrusion 24 and A fixed protrusion 27 is located and is installed to maintain watertightness.

When molding the expansion portion 12, the expansion is performed after extrusion molding to be thicker than the standard thickness (t) through the control thickness (T), so after expansion, the expansion is 0.8 to 1.2 times more than the standard thickness (t). This includes expanding the pipe to have a thick molding thickness (T'), preferably 1.0 times.

Figure 11 is an enlarged cross-sectional view of the main part of the water and sewage pipe expansion part of the present invention, and Figure 12 shows an enlarged cross-sectional view of the main part of the packing inserted into the water and sewage pipe expansion part of the present invention.

The watertight packing 20 has a groove inclined surface 21 in contact with the packing groove 15 on the outer diameter formed to be inclined in the outer diameter direction, and a groove contact portion 22 formed in the transverse direction at the end of the groove inclined surface 21, After the inner groove inclined surface 23 is formed inward from the end of the groove contact portion 22, the internal watertight protrusion 24 is inclined to protrude outward from the end of the inner groove inclined surface 23, thereby increasing the inner diameter of the packing groove 13. Install so as to maintain watertightness.

The watertight packing 20 forms a guide slope 25 at the inner diameter of the groove slope 21, and forms bank inner protrusions 26 at regular intervals inside the guide slope 25.

The fixing protrusion 27 and the internal watertight protrusion 24 formed in the inner radial direction inside the inner protrusion 26 are connected by a connecting inclined surface 28, and the fixing protrusion 27 is connected to the water and sewage pipe 10. Install to maintain watertightness by winding the outer diameter.

The single-collar water and sewerage pipe of the present invention, which has this configuration, and its manufacturing method, which compensates for the thickness reduction due to expansion, extrude the pipe body (11) of a single-layer, two-layer, or three-layer structure, cut it to a predetermined length, and then use an expansion device. The expansion part 12 in which the packing groove 15 is formed is expanded and molded by supplying the mold while first heating the outer diameter and secondarily heating the inner diameter.

The water supply and sewage pipe 10 consisting of the pipe body 11 is selectively extruded into a single-layer, double-layer, or three-layer structure through a process in which the raw material supplied to the extruder 50 is melted, and the extruded pipe body 11 is formed by a cooler 51. ), in the process of being cooled and supplied by either air-cooling or water-cooling, the upper and lower sides of the pipe body 11 are partially brought into close contact with each other from the take-off device 52 to control the extrusion speed, and the take-off device 52 By controlling the extrusion speed through the installed inverter (52a), the thickness of the tubular body (11) can be adjusted.

It is preferable that the thickness of the tube body 11 is molded to meet various standards. After taking the tube body 11, it is cut to a predetermined length during the supply process, or is generally cut to have a length of 6 meters using a cutter ( It is cut at 53) and supplied to the discharge device (54).

A pipe thickness width control device 30 is installed in the discharge device 54 to adjust the control thickness (T), which is 1.1 to 1.5 times thicker than the reference thickness (t), at some widths of the pipe body 11 to the thickness forming width ( It is to be molded in H).

More specifically, after molding the expansion part 12 in the thickness molding width (H) compared to the reference thickness (t), it is extruded to have an adjustable thickness (T) that is molded to be 0.8 to 1.2 times thicker. Includes.

In the process of extrusion molding of the pipe body 11 while maintaining the reference thickness t, when the tip first touches the movement detection roller 43 of the pipe thickness width adjusting device 30, the detected signal is transmitted to the movement detector 42. ) is transmitted to the inverter (52a) to slow down the take-off (extrusion) speed of the take-off (52) by about 5 to 15%. When the production speed is slowed, the pipe body (11) is maintained while maintaining the standard thickness (t). During production, it is extruded to have an adjusted thickness (T) that is 1.1 to 1.5 times thicker than the standard thickness (t).

When the tip of the pipe body 11, which is extruded to have the control thickness T, touches the reference detection roller 38 for the second time, the signal that detects this is transmitted to the inverter 52a through the reference detector 37 and The take-off speed of (52) is accelerated to its original state, and when the production speed becomes faster, production of the pipe body (11) is stopped while maintaining the control thickness (T), and the thickness gradually becomes thinner to a thickness equal to the standard thickness (t). It is extruded to have.

Since the pipe body 11 is formed to have an adjustable thickness (T) so as to have a thickness adjusting portion (14) in the thickness molding width (H), it is cut to a certain length by the cutter (53) and then supplied to the discharge device (54). The adjustable thickness (T) is formed to have a thickness forming width (H) at the cut end, and the thickness forming width (H) is detected as a reference at the first touch of the thickness adjusting unit 14 and the movement detection roller 43. Since it is the same as the secondary touch width of the roller (38), the width of the moving detection roller (43) and the reference sensing roller (38) becomes the thickness forming width (H), so the reference fixed handle (36) and the moving fixed handle (41) are It is possible to perform extrusion molding to have various molding widths by adjusting the distance between the standard stand 35 and the moving stand 40.

The thickness forming width (H) varies depending on the diameter of the water and sewage pipe 10, and the thickness adjustment part 14 has a wider width than the width of the expansion part 12. By doing so, it is possible to provide a stable expanded tube 12 by setting it to be slightly wider than the width of the expanded tube 12 in which the deformation occurred and having a thickness at least equal to the reference thickness (t) according to the pressure change of the inner diameter.

Meanwhile, the height of installing the pipe thickness width adjusting device 30 on the column 31 is adjusted through the column fixing handle 35 on the column connecting rod 33, and the width adjusting rod 32 is controlled by the adjusting rod fixing handle 34. Since it can be adjusted through, the height can be adjusted and applied according to the diameter of the water and sewage pipe (10).

In addition, since the thickness molding width (H) corresponds to the width set to have one expanded pipe (12), the thickness molded width (H) is doubled, the central portion is cut, and then the expanded pipe is separated from the tip of the water and sewage pipe (10). Since the part to be molded to have (12) can be made to correspond to the thickness molding width (H), the pipe thickness width adjusting device (30) can be driven once in the process of manufacturing two lengths of water and sewage pipes (10). It includes

After producing the water and sewage pipe 10, it is desirable to bury it in the ground in a straight line or use it in a necessary location. In order to apply it in the form of a single collar, one end must be expanded.

In order to expand the water and sewer pipe 10, the thickness control part 14, which is 1.1 to 1.5 times thicker than the standard thickness (t) in the thickness molding width 12, is formed to the control thickness (T) and is called the expansion part. The pipe is expanded to (12), and after heating the outer diameter of the thickness control part (14) first and the inner diameter secondarily, the mold is supplied to the inner diameter of the thickness control part (14) from the front and into the packing groove (15). The expansion part 12 is expanded to have an expansion groove 13.

When the expansion part 12 is molded in this way, the thickness is reduced through the expansion in a state in which the thickness control part 14 is extruded to have an adjustable thickness (T), and is reduced by 0.8 to 1.2 times based on the standard thickness (t). It has a molded thickness (T'), and the molded thickness (T') decreases compared to the control thickness (T), but maintains the same thickness or has a thicker thickness compared to the standard thickness (t). Since (12) is molded, it is possible to stably maintain the thickness limited by the standard in the thickness molding width (H), and in actual experiments, no deformation or leakage occurs in the expansion part (12), enabling stable molding of the product. and supply becomes possible.

When the watertight packing (20) is inserted and combined into the packing groove (15), it is combined to form an overall circular ring shape, and a force is applied to the watertight packing (20) in the outer diameter direction to ensure that it is firmly fixed to the packing groove (13). will be provided.

It is installed in a way that continuously connects the water and sewage pipes 10 by pushing the pipe body 11 from the outer diameter of the expanded pipe 12 and connecting it to prevent water leakage.

When the water supply and sewage pipes 10 are connected, the tip of the pipe body 11 is located in the expansion groove 13, and a watertight packing 20 is installed on the outer diameter in the packing groove 15 to prevent water leakage.

In more detail, if the pipe body 11 is pushed further while the tip of the pipe body 11, which is the end of the water and sewage pipe 10, is located in the central part of the guide slope 25, the inner protrusion, which is the inner diameter of the watertight packing 20, It passes through (26) and reaches the tip of the expansion groove (13), which is the inner end of the expansion part (12), and enters and couples to a position where it can no longer enter.

When the pipe body 11 is pushed in, the end portion is pushed inward from the central part of the guide slope 25, so even when the pipe body 11 is pushed, the end portion easily goes over the guide slope 25 and enters the inside, making it watertight. It is possible to prevent the packing 20 from being pushed in or rolled up due to the tube body 11 inserted.

When the coupling is completed by pushing the tube body (11) into the expansion part (12), the fixing protrusion (27) wraps the outer diameter of the tube body (11) to maintain watertightness, and the outer diameter of the tube body (11) and the watertight king (20) Watertightness can be maintained between the watertight and water leakage may occur from the outer diameter of the watertight packing (20) and the packing groove (13), but the internal watertight protrusion (24) improves adhesion with the packing groove (13) to maintain watertightness. While improving the bonding force between the groove inclined surface 21 and the groove contact portion 22 and the inner groove inclined surface 23 and the packing groove 13, watertightness can be stably maintained.

Hereinafter, the most preferred embodiment of the present invention will be described in more detail through the block diagram of FIG. 13 and the attached drawings.

(based on 150mm water pipe)

go. Raw material preparation and supply stage

After mixing and preparing the raw materials for extrusion molding the water and sewer pipe 10, a raw material preparation and supply step (S10) is performed for supplying the raw materials to the extruder 50.

me. Water and sewage pipe extrusion stage

Performing a water and sewer pipe extrusion step (S20) in which the raw materials supplied to the extruder 50 are melt-molded and extruded to form a water and sewer pipe 10 consisting of a single layer, a double structure, and a triple structure at a speed of 900 rpm. will be.

all. Cooling stage of water supply and sewage pipes

In the process of supplying the extruded water and sewage pipes 10, a cooling step (S30) of forming the water and sewage pipes to be cooled in the cooler 51 using either water cooling or air cooling is performed.

la. Water supply and sewage pipe thickness control stage

The cold-formed water and sewage pipe 10 is wrapped and supported in a track shape from the upper and lower sides, and the extrusion molding speed (900 rpm) in the extruder 50 is adjusted to the take-off machine 52 to have a standard thickness (t) of 10.3 mm. Then, the water and sewage pipe thickness control step (S40) is performed in which the thickness is adjusted to have an adjusted thickness (T) that is 1.1 to 1.5 times thicker by slowing down the take-up speed by 5 to 10%.

In the water and sewer pipe thickness control step (S40), an inverter (52a) is installed in the take-off machine (52) and slows down the take-up speed of the water and sewer pipe (10) by 5 to 15% through the pipe thickness width adjustment device (30) to 220 to 220. It involves extrusion molding a control thickness (T) that is 1.1 to 1.5 times thicker than the standard thickness (t) at a thickness molding width (H) of 240 mm.

mind. Water and sewage pipe cutting steps

In the process of extruding and forming the water and sewer pipe 10, a water and sewer pipe cutting step (S50) is performed in which the cutter 53 is cut to either a 6 meter length or a predetermined length so that one end has a thickness forming width (H). will be.

bar. Water supply and sewage pipe thickness and width adjustment steps

When the cut end of the water and sewage pipe 10 first touches the movement detection roller 43 of the pipe thickness width adjustment device 30 of the discharge device 54, a signal is sent to the inverter 52a through the movement detector 42. The speed of 900 rpm, which was created to have a standard thickness (t) of 10.3 mm, was slowed down by 5 to 15% to 790 to 830 rpm to create an adjusted thickness of 11.1 to 11.9 mm (thickness), which is thicker than the standard thickness (t) in the thickness molding width (H). T) is extruded to have, and when the tip of the water and sewage pipe 10 touches the reference detection roller 38 of the pipe thickness width adjustment device 30 of the discharge device 54 for the second time, it is transmitted through the reference detector 37. By sending a signal to the inverter (52a) to increase the speed of production to have the control thickness (T) and extrusion molding to have the standard thickness (t), the thickness and width control step (S60) of the water supply and sewage pipe having the thickness control unit (14) is performed. It is to carry out.
In the water and sewer pipe thickness width adjustment step (S60), the extrusion speed of 900 rpm, which was created to have a standard thickness (t), is further slowed down by 5 to 15% to 790 to 830 rpm to obtain a thickness of 10.3 mm at a thickness forming width (H) of 220 to 240 mm. It is extruded 1.1 to 1.5 times thicker to have a thickness of 11.1 to 11.9 mm, and a width adjustment bar ( The movable table 40 is coupled to the movable table 40 through the movable fixing handle 41, and a movement detection roller ( A movement detector 42 having a 43) and a reference bar 35 movably coupled to the width adjuster 32 are connected to the movement detector 42 and the reference detector 37 through the reference fixing handle 36. The standard detection roller (38) is installed to adjust the width to have a thickness forming width (H), and makes a second touch to the lower side of the standard table (35) so that the water supply and sewage pipe (10) has a standard thickness (t) of 10.3 mm. This is to compensate for the thickness reduction due to the expansion of the pipe made by the reference detector 37 having.

buy. Water supply and sewage pipe discharge stage

After adjusting the thickness and width of the water and sewage pipes 10 and producing them, a water and sewer pipe discharge step (S70) is performed in which they are cut to have a length of 6 meters or a predetermined length and are discharged after supply.

ah. Water and sewage pipe expansion stage

After supplying the water and sewage pipe (10) and heating the outer diameter, the inner diameter is heated and the inner diameter is expanded at the thickness forming width (H) with a mold to expand the expansion part (12) to have a packing groove (15) and an expansion groove (13). , the expansion portion 12 can further perform a water and sewage pipe expansion step (S80) in which the expansion portion 12 is formed to be 0.8 to 1.2 times thicker than the reference thickness (t).

The present invention allows, in the process of extrusion molding water and sewage pipes of various structures, to extrude water and sewer pipes to have a standard thickness at a desired width from an inverter installed in the take-off and a pipe thickness width control device, and then extrude to have a desired thickness, This provides a very useful invention that eliminates the vulnerability of the expanded pipe portion by ensuring that the adjusted thickness is equal to or thicker than the standard thickness even when expanding the pipe by adjusting the thickness within the desired thickness molding width.

10: water and sewer pipe 11: pipe body
12: expansion part 13: expansion groove
14: Thickness control part 20: Watertight packing
21: groove inclined surface 22: groove contact portion
23: Internal groove slope 24: Internal watertight protrusion
25: guiding slope 26: medial protrusion
27: fixed protrusion 28: connection inclined plane
30: Pipe thickness width adjustment device 31: Pillar
32: Width adjustment bar 33: Column connecting bar
34: Adjustment bar fixing handle 35: Standard bar
36: Reference fixing handle 37: Reference detector
38: Reference detection roller 40: Mobile table
41: Movement fixing handle 42: Movement detector
43: Movement detection roller 50: Extruder
51: cooler 52: take-off machine
52a: inverter 53: cutter
54: discharge device

Claims (8)

The water and sewage pipe 10, which is made of the pipe body 11 to be extruded, is extruded so that it has a standard thickness (t) of the pipe body 11 within the range of the thickness molding width (H) that is larger than the expansion portion (12). In the process of extrusion molding to have the reference thickness (t), the driving position is adjusted to the inverter (52a) through the extrusion speed and pipe thickness width control device (30) to change the reference thickness (H) from the thickness forming width (H). It is extruded to have an control thickness (T) that is 1.1 to 1.5 times thicker than t), and the width of the thickness control part (14) having the control thickness (T) is adjusted in the packing groove (15) and the expansion groove (13). It should have an expanded tube 12 that is molded to a thickness of 0.8 to 1.2 times the standard thickness (t);
The control thickness (T) is,
With respect to the reference thickness (t), the inverter (52a) is driven to slow down the extrusion speed by 5 to 15% from 900 rpm to 790 to 830 rpm to obtain a thickness of 10.3 mm at a thickness forming width (H) of 220 to 240 mm of 11.1 to 11.9 mm. Including thicker extrusion molding to have a thickness of mm;
The thickness adjusting part 14 is,
At one end of the water and sewage pipe, it is to have an adjustable thickness (T) of 11.1 to 11.9 mm compared to the standard thickness (t) of 10.3 mm and a thickness forming width (H) of 220 to 240 mm, and within the thickness forming width (H). It includes the expansion part 12 being expanded into a single collar type;
The expansion part 12 is,
It consists of a packing groove 15 into which the watertight packing 20 is inserted and an expansion groove 13 into which the tube body 11 is inserted;
The watertight packing 20 forms a groove inclined surface 21 that contacts the packing groove 15 at its outer diameter, and forms a groove contact portion 22 in the transverse direction at the end of the groove inclined surface 21, and the groove contact portion 22 ) After the internal groove inclined surface 23 is formed inward at the end of the inner groove inclined surface 23, the internal watertight protrusion 24 protrudes obliquely outward from the end of the internal groove inclined surface 23, and the guide inclined surface is guided from the groove inclined surface 21 to the inner diameter. After forming (25), the fixed protrusion 27 and the internal watertight protrusion 24 formed in the inner radial direction on the inside of the inner protrusion 26 at regular intervals inside the guide inclined surface 25 are connected to the inclined surface ( 28) A single-collar type water supply and sewage pipe that compensates for the decrease in thickness due to pipe expansion, characterized in that it is connected to the pipe.
delete delete delete A raw material preparation and supply step (S10) of mixing and preparing raw materials for extrusion molding of the water and sewage pipes 10 and then supplying them to the extruder 50; A water and sewage pipe extrusion step (S20) in which the raw materials supplied to the extruder 50 are melt-molded and the water and sewer pipes 10 are extruded by extrusion; In the process of supplying the extruded water and sewer pipes (10), a water and sewer pipe cooling step (S30) of forming the extruded water and sewer pipes (10) to be cooled in the cooler (51); The cold-formed water and sewage pipe 10 is wrapped and supported in a track shape from the upper and lower sides, and the speed of extrusion molding in the extruder 50 is adjusted to the take-off machine 52 to have a reference thickness (t) and an adjusted thickness (T). Water supply and sewage pipe thickness adjustment step (S40) for adjusting the thickness; In the process of extruding and forming the water and sewer pipes 10, a water and sewer pipe cutting step (S50) of cutting the water and sewer pipes to a predetermined length with a cutter 53 so that one end has a thickness forming width (H); When the cut end of the water and sewage pipe 10 first touches the movement detection roller 43 of the pipe thickness width adjustment device 30 of the discharge device 54, a signal is sent to the inverter 52a through the movement detector 42. The production speed is slowed down to have the reference thickness (t), and when the reference thickness (t) touches the reference detection roller (38) at the thickness forming width (H) for the second time, a signal is sent to the inverter (52a) through the reference detector (37). A step (S60) of controlling the thickness of the water supply and sewage pipe having a thickness control unit 14 by extruding the pipe to have a reference thickness (t) by increasing the production speed to have an adjusted thickness (T); A water and sewage pipe discharge step (S70) in which the thickness and width of the water and sewage pipes 10 are adjusted and discharged after being cut and supplied; Including,
In the water and sewer pipe thickness control step (S40), an inverter (52a) is installed in the take-off machine (52) and slows down the take-up speed of the water and sewer pipe (10) by 5 to 15% through the pipe thickness width adjustment device (30) to 220 to 220. It includes extruding a controlled thickness (T) that is 1.1 to 1.5 times thicker than the reference thickness (t) at a thickness molding width (H) of 240 mm;
In the water and sewage pipe thickness width adjustment step (S60), the extrusion speed of 900 rpm, which was produced to have a standard thickness (t), is further slowed down by 5 to 15% to 790 to 830 rpm to obtain a thickness of 10.3 mm at a thickness forming width (H) of 220 to 240 mm. It is extruded 1.1 to 1.5 times thicker so that the thickness is 11.1 to 11.9 mm, and the width adjustment bar (33) installed on the upper side of the pillars 31 installed at regular intervals is horizontally connected. The movable table 40 is coupled to the movable table 40 through the movable fixing handle 41, and a movement detection roller ( A movement detector 42 having a 43) and a reference bar 35 movably coupled to the width adjuster 32 are connected to the movement detector 42 and the reference detector 37 through the reference fixing handle 36. The standard detection roller (38) is installed to adjust the width to have a thickness forming width (H), and makes a second touch to the lower side of the standard table (35) so that the water supply and sewage pipe (10) has a standard thickness (t) of 10.3 mm. A method of manufacturing a single-collar type water supply and sewage pipe that compensates for the thickness reduction due to expansion of the pipe consisting of a reference sensor (37) having a. delete delete delete