PP-R cold and hot water pipe extrusion mechanism

Abstract

The utility model discloses a PP-R cold and hot water pipe extrusion mechanism, and relates to the technical field of PP-R pipe production and processing, the PP-R cold and hot water pipe extrusion mechanism comprises a connecting disc, one end of the connecting disc is fixedly connected with a connecting pipe, the other end of the connecting disc is rotatably connected with a rotating disc, and the peripheral side of the rotating disc is fixedly connected with a rotating ring; a plurality of extrusion heads are fixedly arranged on the rotating disc in a circumferential array mode, the inner diameters of the extrusion ends of the extrusion heads are not equal, and the extrusion heads are sequentially in butt joint with the connecting pipe in the process that the rotating disc rotates relative to the connecting disc. When materials are conveyed through existing equipment such as a screw and the like, the materials sequentially pass through the connecting pipe and the extrusion head which is in butt joint, when PP-R cold and hot water pipes with different diameters need to be extruded, the rotating ring is rotated to drive the rotating disc to rotate, so that the connecting pipe on the connecting disc is in butt joint with the needed extrusion head, the structure is simple, and the needed extrusion head can be rapidly replaced.

Description

Technical Field

[0001] The utility model relates to the technical field of PP-R pipe production and processing, in particular to an extrusion mechanism for PP-R cold and hot water pipes. Background Technique

[0002] PPR is the abbreviation of type III polypropylene, also known as random copolymer polypropylene pipe. It adopts the hot melt connection method, has special welding and cutting tools, and has high plasticity. The price is also very economical. With an additional insulation layer, the insulation performance is better, and the pipe wall is also very smooth, without internal and external thread joints. It is generally used for embedded walls or deep well buried pipes. PPR pipes have a moderate price, stable performance, heat resistance and insulation, corrosion resistance, smooth inner wall without scaling, a safe and reliable pipeline system, and no penetration. The service life can reach 50 years. However, the construction technical requirements are high, and special tools and professionals are required for construction to ensure the safety of the system. When manufacturing PPR pipes, a single screw extruder is used for shaping.

[0003] The patent with the publication number of CN 211640929 U discloses a hot melt extrusion mechanism for a PPR multi-functional pipe forming device, including an extruder main body. The extruder main body includes a conveying cylinder body and a feeding assembly. The hot melt extrusion mechanism further includes a heating assembly. The heating assembly includes a plurality of heating units. Each heating unit includes a heating protection cover, a heating element arranged inside the heating protection cover, and a power supply for supplying power to the heating element. The heating protection cover includes a first heating half cover and a second heating half cover. The first heating half cover and the second heating half cover jointly enclose an annular heating area and are sleeved on the conveying cylinder body downstream of the feeding assembly. The heating elements are respectively arranged in the first heating half cover and the second heating half cover.

[0004] Most of the common PP-R cold and hot water pipe extrusion mechanisms on the market have problems such as being unable to replace the extrusion head or the replacement process being relatively complicated, which cannot meet the extrusion of PP-R cold and hot water pipes with different diameters and affects the working efficiency of the extrusion work. Therefore, it is necessary to improve the traditional PP-R cold and hot water pipe extrusion mechanism and design a new type of PP-R cold and hot water pipe extrusion mechanism that is convenient for replacing the extrusion head. Content of the Utility Model

[0005] The purpose of the utility model is to provide an extrusion mechanism for PP-R cold and hot water pipes to solve the deficiencies in the above-mentioned prior art.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A PP-R cold and hot water pipe extrusion mechanism, characterized in that it includes a connecting disk, one end of the connecting disk is fixedly connected with a connecting pipe, the other end of the connecting disk is rotatably connected with a rotating disk, and a plurality of extrusion heads are fixedly arranged on the rotating disk in a circumferential array. During the rotation of the rotating disk relative to the connecting disk, each extrusion head is sequentially docked with the connecting pipe.

[0008] Further, the inner diameters of the extrusion ends of each extrusion head are not equal.

[0009] Further, the inner diameters of the feeding ends of each extrusion head are equal to the inner diameter of the connecting pipe.

[0010] Further, a first sealing ring is arranged at one end of the connecting pipe close to the extrusion head, and a second sealing ring is arranged at the feeding end of each extrusion head.

[0011] Further, a rotating ring is fixedly connected to the circumferential side of the rotating disk.

[0012] Further, an annular housing covering each extrusion head is fixedly connected to the rotating disk. A cooling chamber is formed between the annular housing and each extrusion head. An inlet and an outlet both communicating with the cooling chamber are provided on the annular housing.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows: By fixedly connecting the connecting pipe to one end of the connecting disk, rotatably connecting the rotating disk to the other end of the connecting disk, fixedly arranging a plurality of extrusion heads on the rotating disk in a circumferential array, and during the rotation of the rotating disk relative to the connecting disk, each extrusion head is sequentially docked with the connecting pipe. When the material is transported by existing equipment such as a screw, it passes through the connecting pipe and the currently docked extrusion head in sequence. When it is necessary to extrude PP-R cold and hot water pipes with different diameters, rotate the rotating disk to make the connecting pipe on the connecting disk dock with the required extrusion head. The structure is simple and the extrusion head can be quickly replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings.

[0015] Figure 1 It is a schematic structural diagram of a plurality of extrusion heads provided by an embodiment of the present utility model;

[0016] Figure 2 It is a schematic cross-sectional structural diagram of a single extrusion head provided by an embodiment of the present utility model;

[0017] Figure 3Schematic diagram of the overall structure provided by the embodiment of the present utility model.

[0018] Explanation of reference numerals:

[0019] 1. Connecting plate; 2. Connecting pipe; 3. Rotating plate; 4. Extrusion head; 5. First sealing ring; 6. Second sealing ring; 7. Rotating ring; 8. Annular housing; 9. Liquid inlet; 10. Liquid outlet. Specific embodiments

[0020] In order to enable those skilled in the art to better understand the technical solutions of the present utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0021] Please refer to Figures 1-3 , a PP-R cold and hot water pipe extrusion mechanism provided by the embodiment of the present utility model includes a connecting plate 1. One end of the connecting plate 1 is fixedly connected to a connecting pipe 2, and the other end of the connecting plate 1 is rotatably connected to a rotating plate 3. A plurality of extrusion heads 4 are fixedly arranged on the rotating plate 3 in a circumferential array. During the rotation of the rotating plate 3 relative to the connecting plate 1, the extrusion heads 4 are sequentially docked with the connecting pipe 2.

[0022] A through hole is provided on the connecting plate 1, and a plurality of through holes are provided on the rotating plate 3. The through hole on the connecting plate 1 is docked with the connecting pipe 2, and the plurality of through holes on the rotating plate 3 are respectively docked with different extrusion heads 4. The diameters of all the above through holes are equal and equal to the outer diameter of the connecting pipe 2.

[0023] A rotating ring 7 is fixedly connected to the circumferential side of the rotating plate 3. The inner diameters of the feeding ends of the extrusion heads 4 are all equal to the inner diameter of the connecting pipe 2 (docking port), and the inner diameters of the extrusion ends of the extrusion heads 4 are not equal. It can be realized that during the rotation of the rotating plate 3 relative to the connecting plate 1, the extrusion heads 4 are sequentially and smoothly docked with the connecting pipe 2. When it is necessary to extrude PP-R cold and hot water pipes with different diameters, rotate the rotating ring 7 to drive the rotating plate 3 to rotate, so that the connecting pipe 2 on the connecting plate 1 is docked with the required extrusion head 4, and the extrusion head 4 can be quickly replaced.

[0024] A first sealing ring 5 is arranged at one end of the connecting pipe 2 close to the extrusion head 4, and a second sealing ring 6 is arranged at the feeding end of the extrusion head 4, which can ensure that the transportation path is sealed during transportation, so that the material will not leak.

[0025] A ring-shaped housing 8 that encloses each extrusion head 4 is fixedly connected to the rotating disk 3. A cooling chamber is formed between the ring-shaped housing 8 and each extrusion head 4. An inlet port 9 and an outlet port 10 that are both in communication with the cooling chamber are provided on the ring-shaped housing 8. During the extrusion process, the coolant is transported into the cooling chamber through the inlet port 9 via prior art such as water pumps and water pipes. The extrusion head 4 being extruded is sprayed with the coolant using a nozzle for cooling. The sprayed coolant flows out through the outlet port 10, and the flow rate is controlled by a water pump to control the cooling rate, achieving intelligent temperature control. This device can continuously extract coolant from the outside into the cooling chamber, and the cooling effect is better.

[0026] Working principle: When in use, the material is transported into the connecting pipe 2 through prior art such as a screw. The rotating ring 7 is rotated to drive the rotating disk 3 to rotate, so that the connecting pipe 2 on the connecting disk 1 is docked with the required extrusion head 4, enabling the material to enter the extrusion head 4 being docked. The coolant is transported into the cooling chamber through the inlet port 9 via prior art such as water pumps and water pipes. The extrusion head 4 being extruded is sprayed with the coolant using a nozzle for cooling. The sprayed coolant flows out through the outlet port 10, allowing for rapid replacement of the extrusion head 4, and the cooling effect is better.

[0027] Only some exemplary embodiments of the present invention have been described by way of illustration above. Without doubt, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A PP-R hot and cold water pipe extrusion mechanism, characterized in that: The invention comprises a connecting disk (1), one end of which is fixedly connected to a connecting tube (2), and the other end of which is rotatably connected to a rotating disk (3), a plurality of extrusion heads (4) being fixedly arranged in a circumferential array on the rotating disk (3), and each extrusion head (4) being connected to the connecting tube (2) in sequence during the rotation of the rotating disk (3) relative to the connecting disk (1).

2. A PP-R cold and hot water pipe extrusion mechanism according to claim 1, characterized in that: The inner diameters of the extrusion ends of the extrusion heads (4) are not equal.

3. A PP-R cold and hot water pipe extrusion mechanism according to claim 1, characterized in that: The inner diameter of the feed end of each extrusion head (4) is equal to the inner diameter of the connecting pipe (2).

4. A PP-R cold and hot water pipe extrusion mechanism according to claim 1, characterized in that: A first sealing ring (5) is provided at one end of the connecting tube (2) close to the extrusion head (4), and a second sealing ring (6) is provided at the feed end of each extrusion head (4).

5. A PP-R cold and hot water pipe extrusion mechanism according to claim 1, characterized in that: A rotating ring (7) is fixedly connected to the circumferential side of the rotating disk (3).

6. A PP-R cold and hot water pipe extrusion mechanism according to claim 1, characterized in that: An annular shell (8) covering each extrusion head (4) is fixedly connected to the rotating disk (3), a cooling chamber is formed between the annular shell (8) and each extrusion head (4), and a liquid inlet (9) and a liquid outlet (10) both in communication with the cooling chamber are provided on the annular shell (8).

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