Caliber adjusting device for PVC pipeline production

Abstract

The utility model relates to the technical field of PVC pipelines, and discloses a PVC pipeline production caliber adjusting device which comprises a bottom plate, electric telescopic rods I for driving a transverse plate to vertically move are installed on the two sides of the top end of the bottom plate, and electric telescopic rods II for driving a lower mold to vertically move are installed on the two sides of the top end of the transverse plate. Fixing supports are installed on the two sides of the top end of the transverse plate, electric telescopic rods III are installed in the fixing supports, supporting rods are arranged at the top end of the transverse plate, and rotating wheels are connected to the opposite faces of the two supporting rods. Through the shape and position arrangement of the rotating wheel, after the caliber of an extruded pipeline is adjusted through the lower die and the upper die, the rotating wheel can be located at the horizontal contact position of the lower die and the upper die, then after the pipeline is extruded, the pipeline can make contact with the circumferential outer side of the rotating wheel, and the rotating wheel extrudes and shapes the outer side of the pipeline; and the quality of the pipeline after the pipeline caliber is adjusted is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of PVC pipes, and in particular to a caliber adjustment device for PVC pipe production. Background Art

[0002] PVC pipes are made of polyvinyl chloride resin, stabilizers, lubricants, etc., which are then extruded using an extruder through a hot pressing method. Due to different usage scenarios, the required PVC pipe diameters are different, so they need to be extruded through molds of different diameters.

[0003] A caliber adjustment device for PVC pipe production disclosed in Chinese patent CN216884238U adjusts the height of a support plate by a lifting mechanism. The up and down movement of the support plate drives the two vertical plates on its upper side to move up and down. The vertical plates on both sides drive the lower support plate, the lower caliber adjustment plate, the upper support plate, and the upper caliber adjustment plate to move up and down. Different numbers of upper support plates and lower support plates are used to make the device suitable for PVC pipe production equipment of different heights. However, while solving the problem, it has the following disadvantages: in the production of larger thick-walled pipes, a circular mold is formed between the upper support plate and the lower support plate for extrusion, and there will be a gap at the connection between the edges of the upper support plate and the lower support plate, resulting in extrusion marks on the outer surface of the extruded pipe, making the outer surface of the pipe not smooth, affecting the sealing of the connection when the pipes are connected to each other, resulting in water leakage or gas leakage at the connection. Utility Model Content

[0004] The present application proposes a caliber adjustment device for PVC pipe production, which has the advantage of producing pipes with higher quality and is used to solve the problem of mold connection affecting pipe surface quality mentioned in the above background technology.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: a caliber adjustment device for PVC pipe production, comprising a base plate, electric telescopic rods I for driving the vertical movement of the horizontal plate are installed on both sides of the top of the base plate, electric telescopic rods II for driving the vertical movement of the lower mold are installed on both sides of the top of the horizontal plate, the electric telescopic rods II and the lower mold are connected by bolts, fixed brackets located on the outside of the electric telescopic rod II are installed on both sides of the top of the horizontal plate, and an electric telescopic rod III located directly above the lower mold is installed inside the fixed bracket, the electric telescopic rod III drives the upper mold to move vertically, and the electric telescopic rod III and the upper mold are connected by bolts, the top of the horizontal plate is provided with a support rod located directly in front of the arc connection between the lower mold and the upper mold, and the opposite surfaces of the two support rods are connected to a rotating wheel that drives the axial rotation of the rotating shaft.

[0006] Furthermore, the two support rods are symmetrically arranged relative to the midpoint of the circle formed by the lower mold and the upper mold, and the bottom end of the support rod is connected to the top end of the cross plate by bolts.

[0007] Furthermore, the cross-sectional shape of the circumferential side of the runner is an inwardly concave arc, and the concave arc of the side of the runner is the same as the arc of the lower mold and the upper mold installed at the ends of the electric telescopic rod III and the electric telescopic rod II. The material of the runner is resistant to high temperature, and the outer side of the runner contacts the outer side of the extruded PVC pipe.

[0008] Furthermore, the electric telescopic rod III and the electric telescopic rod II drive the lower mold and the upper mold to approach each other, and simultaneously locate the position of the rotating wheel relative to the connection between the lower mold and the upper mold.

[0009] Furthermore, fan blades are connected to the outer sides of the top end and the bottom end of each rotating shaft.

[0010] Furthermore, the two fan blades located on both sides of the lower mold have different rotation directions, and the fan blades are distributed at the four corners of the outer sides of the lower mold and the upper mold.

[0011] The beneficial effects of the utility model are that, through the shape and position setting of the runner, after the diameter of the extruded pipe is adjusted by the lower die and the upper die, the runner will be located at the horizontal contact point of the lower die and the upper die, and then after the pipe is extruded, the pipe will contact the circumferential outer side of the runner, so that the runner squeezes and shapes the outer side of the pipe, making the outer side of the produced pipe smoother, ensuring the quality of the pipe after the diameter of the pipe is adjusted, and improving the service life of the produced PVC pipe.

[0012] Through the setting of the fan blades, after the runner contacts the extruded pipe, the runner will be driven to rotate by the pipe, and then the fan blades will be driven to rotate through the shaft. The rotation of the fan blades will fan the flow of gas outside the pipe, thereby accelerating the cooling of the pipe, improving the cooling efficiency of the pipe, reducing the subsequent water cooling load, and facilitating the rapid production of the pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings, which constitute a part of the specification, illustrate the embodiments disclosed in the present application and, together with the description, serve to explain the principles disclosed in the present application.

[0014] The present application can be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the structure of the utility model.

[0017] In the figure: 1. bottom plate; 2. electric telescopic rod I; 3. horizontal plate; 4. electric telescopic rod II; 5. lower mold; 6. fixed bracket; 7. electric telescopic rod III; 8. upper mold; 9. support rod; 10. rotating wheel; 11. rotating shaft; 12. fan blade. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0019] Embodiment 1

[0020] See also Figure 1 , a caliber adjustment device for PVC pipe production, comprising a bottom plate 1, electric telescopic rods Ⅰ2 for driving a horizontal plate 3 to move vertically are installed on both sides of the top of the bottom plate 1, electric telescopic rods Ⅱ4 for driving a lower mold 5 to move vertically are installed on both sides of the top of the horizontal plate 3, the electric telescopic rods Ⅱ4 and the lower mold 5 are connected by bolts, fixed brackets 6 located on the outside of the electric telescopic rods Ⅱ4 are installed on both sides of the top of the horizontal plate 3, and an electric telescopic rod Ⅲ7 located directly above the lower mold 5 is installed inside the fixed bracket 6, the electric telescopic rod Ⅲ7 drives an upper mold 8 to move vertically, and the electric telescopic rod Ⅲ7 and the upper mold 8 are connected by bolts, a support rod 9 located directly in front of the arc connection between the lower mold 5 and the upper mold 8 is provided on the top of the horizontal plate 3, and a runner 10 for driving an axial rotation of a rotating shaft 11 is connected to the opposite surfaces of the two support rods 9, which can rotate the lower mold 5 and the upper mold 8 of appropriate size through bolt connection, adjust the diameter of the produced pipe, and carry out the production process of thick-walled PVC pipes.

[0021] See also Figure 2 The two support rods 9 are symmetrically arranged relative to the midpoint of the circle formed by the lower mold 5 and the upper mold 8, and the bottom end of the support rod 9 is connected to the top end of the cross plate 3 by bolts. Through the arrangement of the support rod 9, the runners 10 connected by the two support rods 9 are respectively located at the horizontal connection between the lower mold 5 and the upper mold 8, so that the surface of the pipe extruded from the connection will contact the outside of the runner 10 again, so that the outer shape of the runner 10 reshapes the pipe, making the outer surface of the pipe smoother, improving the production quality of the pipe, avoiding affecting the quality of the pipe due to the adjustment of the caliber, and ensuring the service life of the pipe.

[0022] See also Figure 2The cross-sectional shape of the circumferential side of the runner 10 is an inwardly concave arc, and the concave arc of the side of the runner 10 is the same as the arc of the lower mold 5 and the upper mold 8 installed at the ends of the electric telescopic rod III7 and the electric telescopic rod II4. The material of the runner 10 is resistant to high temperature, and the outer side of the runner 10 contacts the outer side of the extruded PVC pipe. The top and bottom edges of the runner 10 are chamfered to make the edge of the runner 10 contact the pipe more gently, which is convenient for the runner 10 to shape the outer side of the pipe. The circumferential surface of the runner 10 has friction with the outer side of the extruded pipe, and then through the shape setting of the runner 10, the runner 10 that is adapted to the shape of the lower mold 5 and the upper mold 8 is selected, and the pipe surface is made smoother through the shaping of the runner 10.

[0023] See also Figure 1 While the electric telescopic rod III7 and the electric telescopic rod II4 drive the lower mold 5 and the upper mold 8 to approach each other, they synchronously position the runner 10 relative to the connection between the lower mold 5 and the upper mold 8. When extruding pipes of different diameters, the lower mold 5 and the upper mold 8 corresponding to the extrusion size will be selected, and then the runner 10 corresponding to the size will be selected. During the installation process, the position of the runner 10 corresponding to the lower mold 5 and the upper mold 8 is adjusted to achieve the shaping effect of the extruded pipe passing through the outside of the runner 10.

[0024] Embodiment 2

[0025] Embodiment 2 is based on Embodiment 1. Please refer to Figure 1 The top and bottom of each rotating shaft 11 are connected to the outside with fan blades 12, and the fan blades 12 are distributed at the four corners of the outside of the lower mold 5 and the upper mold 8. During the shaping process by the runner 10, the extruded pipe contacts the outside of the runner 10, so that the runner 10 is driven to rotate by the movement of the pipe. The rotation of the runner 10 drives the fan blades 12 to rotate. The rotation of the fan blades 12 will fan the air flow around the extruded pipe, so that the gas flow accelerates the heat dissipation speed of the extruded pipe, improves the cooling efficiency, and then improves the production efficiency, and reduces the cooling required for subsequent cooling, reducing the use of cooling water.

[0026] See also Figure 2 The two fan blades 12 on both sides of the lower mold 5 have different rotation directions, that is, the fan blades 12 on both sides of the extrusion pipe rotate symmetrically, and both fan the air to contact the pipe and then flow in the direction of pipe extrusion, thereby increasing the effective length of the flowing airflow to cool the pipe and improving the air cooling effect.

[0027] The usage (working principle) of the utility model is as follows:

[0028] Before the thick-wall PVC pipe extrusion production is carried out, the lower mold 5 and the upper mold 8 of corresponding sizes are selected, and the lower mold 5 and the upper mold 8 are respectively installed on the ends of the electric telescopic rod Ⅱ4 and the electric telescopic rod Ⅲ7, and then the rotating wheel 10 corresponding to the arc of the lower mold 5 and the upper mold 8 is selected, and the rotating shaft 11 is pulled out of the end of the support rod 9 located at the bottom, so that the rotating wheel 10 is sleeved on the outside of the rotating shaft 11, and then the rotating shaft 11 is inserted back into the end of the support rod 9. Finally, the lower mold 5 and the upper mold 8 are driven to approach each other by the electric telescopic rod Ⅱ4 and the electric telescopic rod Ⅲ7, and the connection between the lower mold 5 and the upper mold 8 is located at the vertical midpoint of the rotating wheel 10.

[0029] When the thick-walled PVC pipe is produced by extrusion, the material is squeezed through the lower die 5 and the upper die 8, and the extruded pipe gradually approaches the outside of the runner 10. Due to the shape of the runner 10, the extruded pipe will contact the outside of the runner 10, so that the circumferential side of the runner 10 squeezes the outer wall of the pipe extruded through the connection between the lower die 5 and the upper die 8, and then the outer side of the pipe is shaped through the outer side of the runner 10 to make the outer side of the pipe smoother. At the same time, because the pipe is continuously extruded, the runner 10 is driven to rotate by the continuous extrusion of the pipe. The rotation of the runner 10 drives the fan blades 12 to rotate through the rotating shaft 11, so that the fan blades 12 fan the surrounding air to flow in the circumferential direction of the pipe, so that the airflow flows along the direction of pipe extrusion, accelerates the cooling speed of the pipe after extrusion, and facilitates pipe production.

Claims

1. A caliber adjustment device for PVC pipe production, comprising a bottom plate (1), characterized in that: Electric telescopic rods I (2) for driving the horizontal plate (3) to move vertically are installed on both sides of the top of the bottom plate (1), electric telescopic rods II (4) for driving the lower mold (5) to move vertically are installed on both sides of the top of the horizontal plate (3), the electric telescopic rods II (4) and the lower mold (5) are connected by bolts, fixed brackets (6) located outside the electric telescopic rods II (4) are installed on both sides of the top of the horizontal plate (3), and electric telescopic rods III (7) located directly above the lower mold (5) are installed inside the fixed brackets (6), the electric telescopic rods III (7) drive the upper mold (8) to move vertically, and the electric telescopic rods III (7) and the upper mold (8) are connected by bolts, and the top of the horizontal plate (3) is provided with a support rod (9) located directly in front of the arc connection between the lower mold (5) and the upper mold (8), and the opposite surfaces of the two support rods (9) are connected with a rotating wheel (10) for driving the rotating shaft (11) to rotate axially.

2. A caliber adjustment device for PVC pipe production according to claim 1, characterized in that: The two support rods (9) are symmetrically arranged relative to the midpoint of the circle formed by the lower mold (5) and the upper mold (8), and the bottom ends of the support rods (9) are connected to the top ends of the cross plates (3) by bolts.

3. A caliber adjustment device for PVC pipe production according to claim 1, characterized in that: The cross-sectional shape of the circumferential side surface of the rotating wheel (10) is an inwardly concave arc shape, and the concave arc shape of the side surface of the rotating wheel (10) is the same as the arc shape of the lower mold (5) and the upper mold (8) installed at the ends of the electric telescopic rod III (7) and the electric telescopic rod II (4). The material of the rotating wheel (10) is high temperature resistant, and the outer side of the rotating wheel (10) contacts the outer side of the extruded PVC pipe.

4. A caliber adjustment device for PVC pipe production according to claim 1, characterized in that: The electric telescopic rod III (7) and the electric telescopic rod II (4) drive the lower mold (5) and the upper mold (8) to approach each other, and simultaneously locate the position of the rotating wheel (10) relative to the connection between the lower mold (5) and the upper mold (8).

5. A caliber adjustment device for PVC pipe production according to claim 1, characterized in that: The outer sides of the top end and the bottom end of each rotating shaft (11) are connected with fan blades (12).

6. A caliber adjustment device for PVC pipe production according to claim 5, characterized in that: The two fan blades (12) located on both sides of the lower mold (5) have different rotation directions, and the fan blades (12) are distributed at the four corners outside the lower mold (5) and the upper mold (8).

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