Polyethylene reinforced corrugated pipe production equipment

Abstract

The utility model aims to solve the problem that the ring stiffness of the corrugated pipe produced by the existing PE spiral corrugated pipe production equipment is insufficient. In order to produce PE spiral corrugated pipes meeting requirements, the utility model provides polyethylene reinforced corrugated pipe production equipment which comprises a winding forming device, four plastic extruders, three vacuum cooling shaping boxes and a group of reinforcing steel bar unwinding devices, a plurality of winding devices are arranged in parallel along a winding roller of the winding forming device; the first plastic extruder extrudes an inner pipe wall sheet, and the inner pipe wall sheet is wound on the winding roller through the first upward winding device to form the inner pipe wall of the corrugated pipe; the second plastic extruder extrudes a rib body, the third plastic extruder composites the middle-layer profile to the rib body, the fourth plastic extruder composites the outer-wall tubular profile to the middle-layer profile, and the second upper winding device winds the outer-wall tubular profile composite structure to a winding roller to form the outer wall of the corrugated pipe.

Description

Technical Field

[0001] The utility model relates to the field of corrugated pipe production equipment, in particular to polyethylene reinforced corrugated pipe production equipment. Background Art

[0002] PE spiral corrugated pipe, that is, a corrugated pipe made of polyethylene extruded and spirally formed, is also called a corrugated pipe because its inner and outer surfaces are annular corrugated. It has the characteristics of good wear resistance and corrosion resistance. Because PE material is more resistant to corrosion, wear and aging, and is green and environmentally friendly, PE corrugated pipes are also often used as rainwater and sewage branch pipes.

[0003] At present, PE spiral corrugated pipes are usually used as pipes buried underground for drainage. The external pressure they withstand directly affects the performance of the pipes, and the measurement index is the ring stiffness. If the ring stiffness of the PE spiral corrugated pipe is not enough, the pipe will be deformed during construction or operation because it cannot withstand the external pressure. In order to produce PE spiral corrugated pipes with ring stiffness that meets the standard, it is necessary not only to improve the combined structure of the PE spiral corrugated pipe, but also to improve the production equipment. Summary of the invention

[0004] The utility model is aimed at the existing PE spiral corrugated pipe production equipment, which mainly has two situations. One is to directly use the mold to produce double-layer composite corrugated pipes, and the ring stiffness of such corrugated pipes is far from meeting the requirements. The second is to produce spiral corrugated pipes by combining spiral winding profiles and sheets, and the specific ring stiffness needs to be determined according to the winding profiles. In order to produce PE spiral corrugated pipes that meet the requirements, the utility model proposes a polyethylene reinforced corrugated pipe production equipment.

[0005] A polyethylene reinforced corrugated pipe production equipment, comprising: a winding forming device, 4 plastic extruders, three vacuum cooling and shaping boxes and a set of steel bar unwinding devices;

[0006] A plurality of upper winding devices are arranged in parallel along the winding roller of the winding forming device;

[0007] The first plastic extruder extrude the inner tube wall sheet, which is wound onto a winding roller by a first winding device to form the inner tube wall of the corrugated tube;

[0008] The second plastic extruder extrudes the rib body, the output end of the second plastic extruder is connected to the input end of the first vacuum cooling shaping box, and the rib body is shaped by the first vacuum cooling shaping box;

[0009] The output end of the first vacuum cooling shaping box is connected to the third plastic extruder, the third plastic extruder is a co-extrusion composite plastic extruder, the third plastic extruder composites the middle layer of the material onto the tendon, and the input end of the third plastic extruder is connected to the second vacuum cooling shaping box;

[0010] The output end of the second vacuum cooling and shaping box is connected to the fourth plastic extruder, the fourth plastic extruder is a co-extrusion composite plastic extruder, the steel bar unwinding device simultaneously outputs a group of steel bars and is synchronously input to the fourth plastic extruder with the output of the third plastic extruder, the fourth plastic extruder composites the outer wall tubular material onto the middle layer material, and at the same time embeds steel bars in the outer wall tubular material, and the input end of the fourth plastic extruder is connected to the third vacuum cooling and shaping box;

[0011] The output end of the third vacuum cooling and shaping box winds the outer wall tubular material composite structure onto a winding roller through a second winding device to form the outer wall of the corrugated tube.

[0012] Preferably, the first winding device comprises: a guide wheel and a pressure cylinder; the guide wheel rotation axis is parallel to the winding roller axis, and the guide wheel is used to determine the winding point position of the inner tube wall sheet;

[0013] The pressing cylinder is arranged between the spiral coil where the upper winding point is located and the adjacent spiral coil, and the pressing cylinder is tangent to the outer periphery of the inner tube wall.

[0014] As a preferred embodiment, the second winding device comprises: a guide wheel, a pressing cylinder and a heating device;

[0015] The guide wheel is used to determine the upper winding point of the outer wall tubular material;

[0016] The heating device is arranged between the guide wheel and the upper winding point, and heats the inner peripheral surface of the outer wall tubular material;

[0017] The pressing cylinder is arranged on the spiral coil where the upper winding point is located and the adjacent spiral coil, and the outer coil of the adjacent spiral coil, and the pressing cylinder is matched with the outer wall tubular material.

[0018] Preferably, the spacing between the first winding device and the second winding device is 1% of the thread pitch of the tube or 1.5% of the thread pitch of the tube.

[0019] Preferably, the die of the second plastic extruder is half an ellipse; the die of the third plastic extruder is left-right mirror-symmetrical, including a left section, a middle section, and a right section, wherein the left section and the right section are both rectangular, connected to the middle section, and the middle section is half an ellipse; the die of the fourth plastic extruder is left-right mirror-symmetrical, including a left section, a middle section, and a right section, wherein the left section and the right section are both rectangular, connected to the middle section, and the middle section is half an ellipse.

[0020] Preferably, the die of the second plastic extruder is semi-elliptical; the die of the third plastic extruder is semi-elliptical; the die of the fourth plastic extruder is mirror-symmetrical, including a left section, a middle section, and a right section, wherein the left section and the right section are both rectangular and connected to the middle section, and the middle section is semi-elliptical.

[0021] As the preferred first plastic extruder, a co-extrusion composite plastic extruder is used, and a second steel bar unwinding device is connected to the input end of the first plastic extruder.

[0022] As a preferred embodiment, a third winding device and a fourth winding device are also included; the second winding device, the third winding device and the fourth winding device all include: a guide wheel, a pressing cylinder and a heating device;

[0023] The guide wheel is used to determine the upper winding point; the heating device is arranged between the guide wheel and the upper winding point;

[0024] The output end of the first vacuum cooling and shaping box is input to the second upper winding device, the pressing cylinder of the second upper winding device is arranged outside the upper winding point, and the working surface of the pressing cylinder is tangent to the winding point;

[0025] The output end of the second vacuum cooling and setting box is input to the third upper winding device, the pressing cylinder of the third upper winding device is arranged outside the upper winding point, and the winding point is tangent to the working surface of the pressing cylinder;

[0026] The output end of the third vacuum cooling shaping box is input to the fourth upper winding device. The pressing cylinder of the fourth upper winding device is set on the spiral coil adjacent to the upper winding point. The winding points on the pressing cylinder working surface are tangent, and the pressing cylinder width is greater than the width of the outer wall tubular material.

[0027] The beneficial effect of the utility model is that the presence of the ribs can increase the ring stiffness of the finished spiral corrugated pipe, but because of the structure of the ribs, it needs to dissipate heat separately, and heat dissipation holes are opened in the ribs to assist in the heat dissipation. For this reason, it needs to be extruded separately for molding. Similarly, the thickness of the composite middle layer on the ribs is also at an appropriate thickness to facilitate compounding and heat dissipation. Such a reasonable arrangement can make the ring stiffness of the corrugated structure of the finished spiral corrugated pipe meet the requirements. The dies arranged and connected and selected in accordance with the production method of the utility model can effectively produce the composite profiles used for this type of spiral corrugated pipe. At the same time, the winding device provided by the utility model can accurately wind the profiles onto the winding molding device. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Composite material winding diagram;

[0029] Figure 2 A schematic cross-sectional view of the composite structure of the profile in Example 1;

[0030] Figure 3 A schematic cross-sectional view of the composite structure of the profile in Example 2;

[0031] Figure 4 The connection diagram of the production equipment in Example 1;

[0032] Figure 5 Embodiment 1 Plastic extruder die set;

[0033] Figure 6 Example 2 Plastic extruder die assembly

[0034] Figure 7 Schematic diagram of the first winding device;

[0035] Figure 8 Schematic diagram of the second winding device;

[0036] Fig. 9 A cross-sectional view of the pressing cylinder of the second upper winding device;

[0037] Fig.10 The connection diagram of the production equipment in Example 2;

[0038] Fig.11 The composite material in Example 3 is wound around the figure;

[0039] Fig.12 The connection diagram of the production equipment in Example 3;

[0040] In the figure: 1. inner tube wall sheet, 2. tendon, 3. middle layer material, 4. outer wall tube material, 2.1. heat dissipation hole, 2.2. steel bars on the tendon, 4.1. steel bars on the outer wall tube material, 3.0. combined structure of the middle layer and the tendon, 100. winding molding device, 200. first plastic extruder, 201. second plastic extruder, 202. third plastic extruder, 203. fourth plastic extruder, 300. first vacuum cooling and shaping box, 301. second vacuum cooling and shaping box, 302. third vacuum cooling and shaping box, 400. steel bar unwinding device, 110. guide wheel, 111. a pressing cylinder, 112. a pressing cylinder of a second upper winding device, 113. a heating device, 401. a second steel bar unwinding device, 221.1. a first plastic extruder die in Example 2, 221.2. a shaping rod in Example 2, 3.1. a tendon in Example 2, 3.2. a combined structure of an intermediate layer and a tendon in Example 2, DETAILED DESCRIPTION

[0041] The technical solution of the utility model is further described in detail below through specific embodiments and in conjunction with the accompanying drawings. Example

[0042] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, Figure 1 This is a schematic diagram of the composite winding of the profile. Figure 2 It is a cross-sectional view of the composite structure of the profile used in this embodiment, and is also a cross-sectional view of the tube wall unit.

[0043] like Figure 4The polyethylene reinforced corrugated pipe production equipment shown includes: a winding forming device 100, 4 plastic extruders, three vacuum cooling and shaping boxes and a set of steel bar unwinding devices;

[0044] A plurality of upper winding devices are arranged in parallel along the winding roller of the winding forming device;

[0045] The first plastic extruder 200 extrude the inner tube wall sheet 1, which is wound onto a winding roller through a first winding device to form the inner tube wall of the corrugated tube.

[0046] The second plastic extruder 201 extrudes the rib 2, and the output end of the second plastic extruder is connected to the input end of the first vacuum cooling shaping box, and the rib is shaped by the first vacuum cooling shaping box. Figure 5 201.1 in the figure and 201.2 in the figure are shaping rods used for forming heat dissipation holes 2.1 in the rib body 2.

[0047] The output end of the first vacuum cooling shaping box 300 is connected to the third plastic extruder 202, and the third plastic extruder is a co-extrusion composite plastic extruder. The third plastic extruder composites the middle layer profile 3 onto the tendon, and the input end of the third plastic extruder is connected to the second vacuum cooling shaping box; the die of the third plastic extruder is shown in FIG. Figure 5 202.1 in the figure, 2 in the figure is the rib 2 after cooling and shaping.

[0048] The output end of the second vacuum cooling and shaping box 301 is connected to the fourth plastic extruder 203, and the fourth plastic extruder is a co-extrusion composite plastic extruder. The steel bar unwinding device 400 simultaneously outputs a group of steel bars 4.1 and is synchronously input to the fourth plastic extruder with the output of the third plastic extruder. The fourth plastic extruder composites the outer wall tubular material onto the middle layer material, and embeds steel bars in the outer wall tubular material. The input end of the fourth plastic extruder is connected to the third vacuum cooling and shaping box; the die used by the fourth plastic extruder is as follows: Figure 5 203.1, where 3.0 represents the combined structure of the middle layer and the reinforcement.

[0049] The output end of the third vacuum cooling and shaping box 302 winds the composite structure of the outer wall tubular material 4 onto a winding roller through a second winding device to form the outer wall of the corrugated tube.

[0050] like Figure 7 The first winding device shown includes: a guide wheel 110 and a pressing cylinder 111; the guide wheel shaft is parallel to the winding roller axis, and the guide wheel is used to determine the winding point of the inner tube wall sheet; the pressing cylinder is arranged between the spiral coil where the winding point is located and the adjacent spiral coil, and the pressing cylinder is tangent to the outer periphery of the inner tube wall.

[0051] like Figure 8 and Fig. 9 The second winding device shown includes: a guide wheel 110, a pressing cylinder 112 and a heating device 113;

[0052] The guide wheel is used to determine the upper winding point of the outer wall tubular material;

[0053] The heating device is arranged between the guide wheel and the upper winding point, and heats the inner circumference of the outer wall tubular material; the heating device uses an electric heating plate, and the heating surface of the electric heating plate abuts and cooperates with the inner circumference of the composite material;

[0054] The pressing cylinder is arranged on the spiral coil where the upper winding point is located and the adjacent spiral coil, and the outer coil of the adjacent spiral coil, and the pressing cylinder matches the outer wall tubular material. The axial width of the pressing cylinder 112 is greater than the width of the single outer wall tubular material, so that the two spiral coils can be pressed at the same time, and the axial groove matches the corrugation on the corrugated pipe.

[0055] The setting distance between the first winding device and the second winding device is 1 pitch of the finished pipe.

[0056] The extrusion port of the die 201.1 of the second plastic extruder is semi-elliptical.

[0057] The extrusion port of the die 202.1 of the third plastic extruder is mirror-symmetrical on the left and right, and includes a left section, a middle section, and a right section, wherein the left section and the right section are both rectangular and connected to the middle section, and the middle section is half an ellipse.

[0058] The extrusion port of the fourth plastic extruder die 203.1 is mirror-symmetrical, including a left section, a middle section, and a right section, wherein the left section and the right section are both rectangular and connected to the middle section, and the middle section is half an ellipse. Example

[0059] This embodiment is basically the same as the embodiment 1. The composite structure of the finished tube is as follows: Figure 3 As shown, the structure is different from that in Example 1, so a different extruder die needs to be arranged. Figure 3 Steel bars 2.2 are also embedded in the middle reinforcement body, so a steel bar unwinding device is also added to the connection relationship between the equipment. The specific connection diagram is as follows Fig.10 The second steel bar unwinding device is marked with 401

[0060] The first plastic extruder is a co-extrusion composite plastic extruder, and a second steel bar unwinding device is connected to the input end of the first plastic extruder. A shaping rod 221.2 for forming heat dissipation holes is also included in the die 221.1.

[0061] The die 222.1 of the second plastic extruder is semi-elliptical; the 3.1 in the figure is the co-extruded composite rib.

[0062] The die of the third plastic extruder is half an ellipse; the die of the fourth plastic extruder is left-right mirror symmetric, including a left section, a middle section, and a right section, wherein the left section and the right section are both rectangular and connected to the middle section, and the middle section is half an ellipse. The mark 3.2 in the figure is the structure of the co-extrusion composite middle layer wrapping the tendon. Example

[0063] like Fig.11 and Fig.12 As shown, this embodiment is a variant of Embodiment 1, and the difference from Embodiment 1 is that the extruded profile is directly wound up, which can shorten the actual floor space of the production line, simplify the demand for the composite base machine, and also reduce the demand scale of the composite extruder.

[0064] The upper winding device is increased by a third upper winding device and a fourth upper winding device.

[0065] The second winding device, the third winding device and the fourth winding device all include: a guide wheel 110, a pressing cylinder 112 and a heating device 113;

[0066] The guide wheel is used to determine the upper winding point; the heating device is arranged between the guide wheel and the upper winding point;

[0067] The output end of the first vacuum cooling and shaping box is input to the second upper winding device, the pressing cylinder of the second upper winding device is arranged outside the upper winding point, and the working surface of the pressing cylinder is tangent to the winding point;

[0068] The output end of the second vacuum cooling and setting box is input to the third upper winding device, the pressing cylinder of the third upper winding device is arranged outside the upper winding point, and the winding point is tangent to the working surface of the pressing cylinder;

[0069] The output end of the third vacuum cooling shaping box is input to the fourth upper winding device. The pressing cylinder of the fourth upper winding device is set on the spiral coil adjacent to the upper winding point. The winding points on the pressing cylinder working surface are tangent, and the pressing cylinder width is greater than the width of the outer wall tubular material.

[0070] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A polyethylene reinforced corrugated pipe production equipment, characterized in that: include: Winding forming device, 4 plastic extruders, three vacuum cooling and shaping boxes and a set of steel bar unwinding device; A plurality of upper winding devices are arranged in parallel along the winding roller of the winding forming device; The first plastic extruder extrude the inner tube wall sheet, which is wound onto a winding roller by a first winding device to form the inner tube wall of the corrugated tube; The second plastic extruder extrudes the rib body, the output end of the second plastic extruder is connected to the input end of the first vacuum cooling shaping box, and the rib body is shaped by the first vacuum cooling shaping box; The output end of the first vacuum cooling shaping box is connected to the third plastic extruder, the third plastic extruder is a co-extrusion composite plastic extruder, the third plastic extruder composites the middle layer of the material onto the tendon, and the input end of the third plastic extruder is connected to the second vacuum cooling shaping box; The output end of the second vacuum cooling and shaping box is connected to the fourth plastic extruder, the fourth plastic extruder is a co-extrusion composite plastic extruder, the steel bar unwinding device simultaneously outputs a group of steel bars and is synchronously input to the fourth plastic extruder with the output of the third plastic extruder, the fourth plastic extruder composites the outer wall tubular material onto the middle layer material, and at the same time embeds steel bars in the outer wall tubular material, and the input end of the fourth plastic extruder is connected to the third vacuum cooling and shaping box; The output end of the third vacuum cooling and shaping box winds the outer wall tubular material composite structure onto a winding roller through a second winding device to form the outer wall of the corrugated tube.

2. The polyethylene reinforced corrugated pipe production equipment according to claim 1, characterized in that: The first winding device includes: a guide wheel and a pressure cylinder; the guide wheel rotation axis is parallel to the winding roller axis, and the guide wheel is used to determine the winding point of the inner tube wall sheet; The pressing cylinder is arranged between the spiral coil where the upper winding point is located and the adjacent spiral coil, and the pressing cylinder is tangent to the outer periphery of the inner tube wall.

3. The polyethylene reinforced corrugated pipe production equipment according to claim 1, characterized in that: The second winding device includes: a guide wheel, a pressing cylinder and a heating device; The guide wheel is used to determine the upper winding point of the outer wall tubular material; The heating device is arranged between the guide wheel and the upper winding point, and heats the inner peripheral surface of the outer wall tubular material; The pressing cylinder is arranged on the spiral coil where the upper winding point is located and the adjacent spiral coil, and the outer coil of the adjacent spiral coil, and the pressing cylinder is matched with the outer wall tubular material.

4. The polyethylene reinforced corrugated pipe production equipment according to claim 1, characterized in that: The setting distance between the first winding device and the second winding device is 1% of the pitch of the tube or 1.5% of the pitch of the tube.

5. The polyethylene reinforced corrugated pipe production equipment according to claim 1, characterized in that: The mouth die of the second plastic extruder is half an ellipse; the mouth die of the third plastic extruder is mirror-symmetrical, including a left section, a middle section, and a right section, wherein the left section and the right section are both rectangular, connected to the middle section, and the middle section is half an ellipse; the mouth die of the fourth plastic extruder is mirror-symmetrical, including a left section, a middle section, and a right section, wherein the left section and the right section are both rectangular, connected to the middle section, and the middle section is half an ellipse.

6. The polyethylene reinforced corrugated pipe production equipment according to claim 1, characterized in that: The die of the second plastic extruder is half an ellipse; the die of the third plastic extruder is half an ellipse; the die of the fourth plastic extruder is mirror-symmetrical, including a left section, a middle section, and a right section, wherein the left section and the right section are both rectangular and connected to the middle section, and the middle section is half an ellipse.

7. The polyethylene reinforced corrugated pipe production equipment according to claim 6, characterized in that: The first plastic extruder is a co-extrusion composite plastic extruder, and a second steel bar unwinding device is connected to the input end of the first plastic extruder.

8. The polyethylene reinforced corrugated pipe production equipment according to claim 5, characterized in that: It also includes a third winding device and a fourth winding device; the second winding device, the third winding device, and the fourth winding device all include: a guide wheel, a pressing cylinder, and a heating device; The guide wheel is used to determine the upper winding point; the heating device is arranged between the guide wheel and the upper winding point; The output end of the first vacuum cooling and shaping box is input to the second upper winding device, the pressing cylinder of the second upper winding device is arranged outside the upper winding point, and the working surface of the pressing cylinder is tangent to the winding point; The output end of the second vacuum cooling and setting box is input to the third upper winding device, the pressing cylinder of the third upper winding device is arranged outside the upper winding point, and the winding point is tangent to the working surface of the pressing cylinder; The output end of the third vacuum cooling shaping box is input to the fourth upper winding device. The pressing cylinder of the fourth upper winding device is set on the spiral coil adjacent to the upper winding point. The winding points on the pressing cylinder working surface are tangent, and the pressing cylinder width is greater than the width of the outer wall tubular material.

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