Multi-layer PE pipe extrusion equipment

Abstract

The utility model relates to the technical field of PE pipe extrusion equipment, in particular to multi-layer PE pipe extrusion equipment. The extrusion main shaft, the central die, the first extrusion sleeve, the rotating sleeve, the second extrusion sleeve and other structures are ingeniously designed, particularly the structure of the rotating sleeve is designed, and the spiral middle framework layer structure is extruded on the surface of an inner-layer pipe blank in the inner-layer pipe blank extrusion process through rotation of the rotating sleeve; and an outer-layer pipe blank is extruded through a second spiral part structure outside the rotating sleeve.

Description

Technical Field

[0001] The utility model relates to the technical field of PE pipe extrusion equipment, in particular to a multi-layer PE pipe extrusion equipment. Background Art

[0002] In order to improve the various properties of PE pipes, in addition to studying the ratio of raw materials for pipes, the structure of the pipes can also be improved. For example, a multi-layer PE pipe structure is designed, including an inner layer, an intermediate skeleton layer and an outer layer, and the intermediate skeleton layer is a spiral skeleton structure sandwiched between the inner layer and the outer layer. This structure can provide skeleton support for the entire pipe by adding raw materials such as glass fiber to the raw materials of the intermediate skeleton layer, thereby improving the compressive performance of the pipe. However, PE pipes of this structure are difficult to achieve through conventional extrusion equipment. Therefore, it is urgent to provide a multi-layer PE pipe extrusion equipment that can achieve efficient extrusion production of a special pipe structure in which the intermediate skeleton layer is a spiral skeleton structure sandwiched between the inner layer and the outer layer. Utility Model Content

[0003] The technical problem to be solved by the utility model is: it is urgent to provide a multi-layer PE pipe extrusion equipment, which can realize the efficient extrusion production of a special pipe structure in which the middle skeleton layer is a spiral skeleton structure sandwiched between the inner layer and the outer layer.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] Multilayer PE pipe extrusion equipment, including:

[0006] frame;

[0007] An extrusion main shaft, the extrusion main shaft is rotatably connected to the frame, and a first spiral portion is connected to a side of the extrusion main shaft;

[0008] A central mold, wherein the central mold is connected to the frame, the central mold is a rotating body, and the axis of the central mold coincides with the axis of the extrusion spindle;

[0009] A first extrusion sleeve, wherein the first extrusion sleeve is connected to the frame, the first extrusion sleeve is sleeved on the outside of the extrusion main shaft, a first extrusion chamber is formed between the front section of the first extrusion sleeve and the extrusion main shaft, and an annular extrusion cavity is formed between the rear section of the first extrusion sleeve and the central mold;

[0010] A rotating sleeve, the rotating sleeve is coaxially rotatably connected to the outside of the first extrusion sleeve, the rear section of the rotating sleeve extends to the rear of the extrusion direction of the first extrusion sleeve, the inner diameter of the rear section of the rotating sleeve is the same as the diameter of the rear section of the first extrusion sleeve, an extrusion cavity is formed between the rear section of the rotating sleeve and the central mold, an annular channel is provided in the rotating sleeve, the annular channel is connected to the outer circumferential surface of the rotating sleeve; the annular channel is connected to an extrusion channel connected to the inner wall of the rear section of the rotating sleeve; the outer wall of the rotating sleeve is provided with a second spiral portion;

[0011] An annular rotating connection part, the annular rotating connection part is rotationally sealedly connected to the annular channel part of the rotating sleeve, and the annular connection part is connected to a feed pipe;

[0012] A driving mechanism, the driving mechanism is drivingly connected to the extrusion main shaft and the rotating sleeve, and is used to drive the extrusion main shaft and the rotating sleeve to rotate;

[0013] A second extrusion sleeve, the second extrusion sleeve is connected to the frame, the second extrusion sleeve is coaxially sleeved on the outside of the rotating sleeve, and a second extrusion chamber is formed between the second extrusion sleeve and the rotating sleeve; the rear section of the second extrusion sleeve extends to the rear of the extrusion direction of the rear section of the rotating sleeve, and an extrusion cavity is formed between the rear section of the second extrusion sleeve and the central mold, and the inner diameter of the rear section of the second extrusion sleeve is larger than the inner diameter of the rear section of the first extrusion sleeve.

[0014] Further, in the above-mentioned multi-layer PE pipe extrusion equipment structure, the driving mechanism includes a first driving motor, a first bevel gear, a second bevel gear, a first rotating shaft, a first pulley, a second pulley, a transmission belt, a third bevel gear, a fourth bevel gear and a second rotating shaft;

[0015] The first driving motor is connected to the extrusion main shaft in a transmission manner, the first bevel gear is coaxially sleeved on the extrusion main shaft, the first rotating shaft is connected to the frame through a bearing, the first rotating shaft is perpendicular to the extrusion main shaft, the second bevel gear is coaxially connected to the first rotating shaft, the second bevel gear is meshed with the first bevel gear, and the first pulley is coaxially connected to the first rotating shaft;

[0016] The third bevel gear is coaxially sleeved on the rotating sleeve;

[0017] The second rotating shaft is connected to the frame through a main bearing, the second rotating shaft is perpendicular to the extrusion main shaft, the fourth bevel gear is coaxially connected to the second rotating shaft, the fourth bevel gear is meshed with the third bevel gear, the second pulley is coaxially connected to the second rotating shaft, and the transmission belt is connected to the first pulley and the second pulley.

[0018] Furthermore, in the above-mentioned multi-layer PE pipe extrusion equipment structure, an extrusion screw is provided in the feed pipe, and the extrusion screw is transmission-connected to a second drive motor.

[0019] Furthermore, in the above-mentioned multi-layer PE pipe extrusion equipment structure, the inner diameter of the middle section of the first extrusion sleeve is smaller than the inner diameter of the front section thereof.

[0020] Furthermore, in the above-mentioned multi-layer PE pipe extrusion equipment structure, a reinforcing rib is connected between the front section of the central die and the middle section of the first extrusion sleeve.

[0021] The beneficial effect of the utility model lies in that: by cleverly designing the structures such as the extrusion main shaft, the central die, the first extrusion sleeve, the rotating sleeve, the second extrusion sleeve, etc., especially the structure of the rotating sleeve, the rotation of the rotating sleeve is utilized to realize the extrusion of a spiral intermediate skeleton layer structure on the surface of the inner tube blank during the extrusion of the inner tube blank, and the extrusion of the outer tube blank is realized through the second spiral structure outside the rotating sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural schematic diagram of a multi-layer PE pipe extrusion device according to a specific embodiment of the utility model;

[0023] Figure 2 This is a cross-sectional view of the PE pipe structure extruded by the multi-layer PE pipe extrusion equipment according to the specific implementation mode of the utility model;

[0024] Description of labels:

[0025] 1. Extrusion spindle; 11. First spiral part;

[0026] 2. Center mold; 21. Reinforcement ribs;

[0027] 3. First extrusion sleeve;

[0028] 4. A first extrusion chamber;

[0029] 5. Rotating sleeve; 51. Annular channel; 52. Extrusion channel; 53. Second spiral portion;

[0030] 6. annular rotating connection; 61. feeding pipe;

[0031] 7. Driving mechanism; 71. First driving motor; 72. First bevel gear; 73. Second bevel gear; 74. First rotating shaft; 75. First pulley; 76. Second pulley; 77. Transmission belt; 78. Third bevel gear; 79. Fourth bevel gear; 710. Second rotating shaft;

[0032] 8. Second extrusion sleeve;

[0033] 9. Second extrusion chamber;

[0034] 101. extrusion screw; 102. second drive motor;

[0035] 111, inner layer; 112, middle skeleton layer; 113, outer layer. DETAILED DESCRIPTION

[0036] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0037] Please refer to Figure 1 , multi-layer PE pipe extrusion equipment, including:

[0038] frame;

[0039] An extrusion main shaft 1, wherein the extrusion main shaft 1 is rotatably connected to the frame, and a first spiral portion 11 is connected to a side of the extrusion main shaft 1;

[0040] A central mold 2, wherein the central mold 2 is connected to the frame, the central mold 2 is a rotating body, and the axis of the central mold 2 coincides with the axis of the extrusion spindle 1;

[0041] A first extrusion sleeve 3, the first extrusion sleeve 3 is connected to the frame, the first extrusion sleeve 3 is sleeved on the outside of the extrusion main shaft 1, a first extrusion chamber 4 is formed between the front section of the first extrusion sleeve 3 and the extrusion main shaft 1, and an annular extrusion cavity is formed between the rear section of the first extrusion sleeve 3 and the central mold 2;

[0042] A rotating sleeve 5, the rotating sleeve 5 is coaxially rotatably connected to the outside of the first extrusion sleeve 3, the rear section of the rotating sleeve 5 extends to the rear of the extrusion direction of the first extrusion sleeve 3, the inner diameter of the rear section of the rotating sleeve 5 is the same as the diameter of the rear section of the first extrusion sleeve 3, an extrusion cavity is formed between the rear section of the rotating sleeve 5 and the central mold 2, an annular channel 51 is provided in the rotating sleeve 5, and the annular channel 51 is communicated with the outer circumferential surface of the rotating sleeve 5; the annular channel 51 is connected to an extrusion channel 52 that is connected to the inner wall of the rear section of the rotating sleeve 5; the outer wall of the rotating sleeve 5 is provided with a second spiral portion 53;

[0043] an annular rotating connection part 6, the annular rotating connection part 6 is rotatably sealed with the annular channel 51 of the rotating sleeve 5, and the annular connection part is connected with a feed pipe 61;

[0044] A driving mechanism 7, wherein the driving mechanism 7 is in transmission connection with the extrusion main shaft 1 and the rotating sleeve 5, and is used for driving the extrusion main shaft 1 and the rotating sleeve 5 to rotate;

[0045] A second extrusion sleeve 8 is connected to the frame, and the second extrusion sleeve 8 is coaxially sleeved on the outside of the rotating sleeve 5, and a second extrusion chamber 9 is formed between the second extrusion sleeve 8 and the rotating sleeve 5; the rear section of the second extrusion sleeve 8 extends to the rear of the extrusion direction of the rear section of the rotating sleeve 5, and an extrusion cavity is formed between the rear section of the second extrusion sleeve 8 and the central mold 2, and the inner diameter of the rear section of the second extrusion sleeve 8 is larger than the inner diameter of the rear section of the first extrusion sleeve 3.

[0046] The working principle of the above implementation is:

[0047] S1: the raw materials of the inner layer 111 tube blank are mixed evenly, melted, and then put into the first extrusion chamber 4 to extrude the inner layer 111 tube blank;

[0048] S2: The intermediate layer skeleton raw materials are mixed evenly, melted, passed into the annular channel 51 through the feed pipe 61, and extruded into the extrusion channel 52 under pressure. During the uniform speed extrusion process of the inner layer 111 tube blank, the rotating sleeve 5 is controlled to rotate continuously at a uniform speed, so that the intermediate layer skeleton raw materials are spirally extruded to the outside of the inner layer 111 tube blank;

[0049] S3: The raw materials of the outer layer 113 tube blank are mixed evenly, melted, and then put into the second extrusion chamber 9. Under the rotation of the rotating sleeve 5, the second spiral part 53 extrude the raw materials in the second extrusion chamber 9 to the outside of the inner layer 111 tube blank and the intermediate skeleton layer 112.

[0050] As a preferred embodiment, the driving mechanism 7 includes a first driving motor 71, a first bevel gear 72, a second bevel gear 73, a first rotating shaft 74, a first pulley 75, a second pulley 76, a transmission belt 77, a third bevel gear 78, a fourth bevel gear 79 and a second rotating shaft 710;

[0051] The first driving motor 71 is connected to the extrusion main shaft 1 in a transmission manner, the first bevel gear 72 is coaxially sleeved on the extrusion main shaft 1, the first rotating shaft 74 is connected to the frame through a bearing, the first rotating shaft 74 is perpendicular to the extrusion main shaft 1, the second bevel gear 73 is coaxially connected to the first rotating shaft 74, the second bevel gear 73 is meshed with the first bevel gear 72, and the first pulley 75 is coaxially connected to the first rotating shaft 74;

[0052] The third bevel gear 78 is coaxially sleeved on the rotating sleeve 5;

[0053] The second rotating shaft 710 is connected to the frame through a main bearing, the second rotating shaft 710 is perpendicular to the extrusion main shaft 1, the fourth bevel gear 79 is coaxially connected to the second rotating shaft 710, the fourth bevel gear 79 is meshed with the third bevel gear 78, the second pulley 76 is coaxially connected to the second rotating shaft 710, and the transmission belt 77 is transmission-connected to the first pulley 75 and the second pulley 76.

[0054] In the above structure, through the transmission of multiple bevel gears and pulleys, only one first drive motor 71 is needed to drive the extrusion main shaft 1 and the rotating sleeve 5 to rotate synchronously at the same time.

[0055] As a preferred embodiment, an extrusion screw 101 is disposed in the feed pipe 61 , and the extrusion screw 101 is transmission-connected to a second drive motor 102 .

[0056] In the above structure, the molten raw material of the middle skeleton layer 112 is introduced into the feed pipe 61 , and the raw material is extruded into the annular channel 51 by the extrusion screw 101 .

[0057] As a preferred embodiment, the inner diameter of the middle section of the first extrusion sleeve 3 is smaller than the inner diameter of the front section thereof.

[0058] In the above structure, the necking design at the terminal end of the first extrusion sleeve 3 can increase the extrusion pressure.

[0059] As a preferred embodiment, a reinforcing rib 21 is connected between the front section of the central die 2 and the middle section of the first extrusion sleeve 3 .

[0060] In the above structure, by providing the reinforcing ribs 21, the central die 2 can always be kept centered, thereby keeping the first extrusion chamber 4 between the first extrusion sleeve 3 and the central die 2 stable, thereby improving the extrusion accuracy of the pipe.

[0061] Please refer to Figure 2 , Figure 2 It is a cross-sectional view of a PE pipe extruded by the above multi-layer PE pipe extrusion equipment, including an inner layer 111 , an intermediate skeleton layer 112 and an outer layer 113 .

[0062] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. Multilayer PE pipe extrusion equipment, characterized in that: include: frame; An extrusion main shaft, the extrusion main shaft is rotatably connected to the frame, and a first spiral portion is connected to a side of the extrusion main shaft; A central mold, wherein the central mold is connected to the frame, the central mold is a rotating body, and the axis of the central mold coincides with the axis of the extrusion spindle; A first extrusion sleeve, wherein the first extrusion sleeve is connected to the frame, the first extrusion sleeve is sleeved on the outside of the extrusion main shaft, a first extrusion chamber is formed between the front section of the first extrusion sleeve and the extrusion main shaft, and an annular extrusion cavity is formed between the rear section of the first extrusion sleeve and the central mold; A rotating sleeve, the rotating sleeve is coaxially rotatably connected to the outside of the first extrusion sleeve, the rear section of the rotating sleeve extends to the rear of the extrusion direction of the first extrusion sleeve, the inner diameter of the rear section of the rotating sleeve is the same as the diameter of the rear section of the first extrusion sleeve, an extrusion cavity is formed between the rear section of the rotating sleeve and the central mold, an annular channel is provided in the rotating sleeve, the annular channel is connected to the outer circumferential surface of the rotating sleeve; the annular channel is connected to an extrusion channel connected to the inner wall of the rear section of the rotating sleeve; the outer wall of the rotating sleeve is provided with a second spiral portion; An annular rotating connection part, the annular rotating connection part is rotationally sealedly connected to the annular channel part of the rotating sleeve, and the annular rotating connection part is connected to a feed pipe; A driving mechanism, the driving mechanism is drivingly connected to the extrusion main shaft and the rotating sleeve, and is used to drive the extrusion main shaft and the rotating sleeve to rotate; A second extrusion sleeve, the second extrusion sleeve is connected to the frame, the second extrusion sleeve is coaxially sleeved on the outside of the rotating sleeve, and a second extrusion chamber is formed between the second extrusion sleeve and the rotating sleeve; the rear section of the second extrusion sleeve extends to the rear of the extrusion direction of the rear section of the rotating sleeve, and an extrusion cavity is formed between the rear section of the second extrusion sleeve and the central mold, and the inner diameter of the rear section of the second extrusion sleeve is larger than the inner diameter of the rear section of the first extrusion sleeve.

2. The multi-layer PE pipe extrusion equipment according to claim 1, characterized in that: The driving mechanism comprises a first driving motor, a first bevel gear, a second bevel gear, a first rotating shaft, a first pulley, a second pulley, a transmission belt, a third bevel gear, a fourth bevel gear and a second rotating shaft; The first driving motor is connected to the extrusion main shaft in a transmission manner, the first bevel gear is coaxially sleeved on the extrusion main shaft, the first rotating shaft is connected to the frame through a bearing, the first rotating shaft is perpendicular to the extrusion main shaft, the second bevel gear is coaxially connected to the first rotating shaft, the second bevel gear is meshed with the first bevel gear, and the first pulley is coaxially connected to the first rotating shaft; The third bevel gear is coaxially sleeved on the rotating sleeve; The second rotating shaft is connected to the frame through a main bearing, the second rotating shaft is perpendicular to the extrusion main shaft, the fourth bevel gear is coaxially connected to the second rotating shaft, the fourth bevel gear is meshed with the third bevel gear, the second pulley is coaxially connected to the second rotating shaft, and the transmission belt is connected to the first pulley and the second pulley.

3. The multi-layer PE pipe extrusion equipment according to claim 1, characterized in that: An extrusion screw is arranged in the feed pipe, and the extrusion screw is transmission-connected to a second drive motor.

4. The multi-layer PE pipe extrusion equipment according to claim 1, characterized in that: The inner diameter of the middle section of the first extrusion sleeve is smaller than the inner diameter of the front section thereof.

5. The multi-layer PE pipe extrusion equipment according to claim 1, characterized in that: A reinforcing rib is connected between the front section of the central die and the middle section of the first extrusion sleeve.

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