Plastic-coated steel pipe twisting device

Abstract

The invention provides a plastic-coated steel pipe twisting device which comprises an extrusion mold installed on an extrusion machine, and the extrusion mold is used for allowing a steel pipe to continuously penetrate through and conducting continuous plastic coating on the steel pipe. The plastic-coated steel pipe twisting device further comprises a supporting sleeve, a rotating sleeve, a transmission assembly and a servo motor. The supporting sleeve is fixed to the discharging side of an extrusion mold, the rotating sleeve is rotationally connected to the inner side of the supporting sleeve, a polygonal hole is coaxially formed in the middle of the rotating sleeve, and a steel pipe penetrates through the polygonal hole and is in clearance fit with the polygonal hole; the transmission assembly is connected to the supporting sleeve, the input end of the transmission assembly is in transmission connection with the servo motor, and the output end of the transmission assembly is in transmission connection with the supporting sleeve. The servo motor is used for driving the rotating sleeve to intermittently rotate relative to the steel pipe through the transmission assembly. According to the plastic-coated steel pipe, the plastic wrapping layer wrapping the steel pipe can be twisted, so that the appearance attractiveness of the plastic-coated steel pipe can be improved, and the twisted plastic-coated steel pipe can facilitate climbing of roots and stems of flowers.

Description

Technical Field

[0001] The invention relates to the technical field of plastic-coated steel pipe processing equipment, and in particular to a plastic-coated steel pipe twisting device. Background Art

[0002] Currently, the existing steel pipe plastic coating technology uses the principle of extrusion by extruder and mold for online plastic coating, but the surface treatment of the plastic coating is very simple. Some manufacturers make a smooth surface, and some add four ribs as a shape. The structure is simple and has no aesthetic appeal. Currently, these plastic-coated steel pipes are mostly used in gardening support products, such as gardening pillars that replace bamboo, climbing racks, and mainly used for supporting racks for growing vegetables and flowers. There are many such products and the competition is fierce. It is difficult to form differentiated products in the market. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a plastic-coated steel pipe twisting device, which can twist the plastic wrapping layer wrapped around the outside of the steel pipe, thereby improving the appearance of the plastic-coated steel pipe, and the twisted plastic-coated steel pipe can be conducive to the climbing of the roots and stems of flowers.

[0004] The present invention provides a plastic-coated steel pipe twisting device, which includes an extrusion die installed on an extruder, and the extrusion die is used for continuously allowing a steel pipe to pass through and continuously plastic-coating the steel pipe; the plastic-coated steel pipe twisting device also includes a support sleeve, a rotating sleeve, a transmission assembly and a servo motor; the support sleeve is fixed on the discharge side of the extrusion die, and the rotating sleeve is rotatably connected to the inner side of the support sleeve, and a polygonal hole is coaxially provided on the middle part of the rotating sleeve, and the polygonal hole is used for allowing the steel pipe to pass through and to fit with the steel pipe gap; the transmission assembly is connected to the support sleeve, and the input end of the transmission assembly is transmission-connected to the servo motor, and the output end of the transmission assembly is transmission-connected to the support sleeve; the servo motor is used to drive the rotating sleeve to intermittently rotate relative to the steel pipe via the transmission assembly.

[0005] The present invention can twist the plastic wrapping layer wrapped around the outside of the steel pipe, thereby improving the appearance of the plastic-coated steel pipe, and the twisted plastic-coated steel pipe can be beneficial to the climbing of the roots of flowers. In addition, the twisted plastic-coated steel pipe can be applied to products such as arch flower stands, column flower stands, rose fences, etc., so that the target product is clearly distinguished from similar products on the market, thereby improving the market competitiveness of the target product.

[0006] In one possible embodiment, a conical material guide portion is coaxially provided on the inner side of the rotating sleeve, and the material guide portion is used to guide the molten plastic material to the polygonal hole and allow the plastic material to be wrapped around the outer peripheral wall of the steel pipe; by adopting this structure, under the action of the material guide portion, the material guide portion can guide the plastic material in a molten state from the extrusion die to the polygonal hole and allow the plastic material to be reliably wrapped around the outer peripheral wall of the steel pipe.

[0007] In one possible embodiment, the transmission assembly includes a rotating shaft, a driving gear and an intermediate gear; the rotating shaft is arranged in a support sleeve and is rotatably connected to the support sleeve, one end of the rotating shaft is transmission-connected to the servo motor, the driving gear is coaxially fixed to the other end of the rotating shaft, the intermediate gear is rotatably connected to the support sleeve through the support shaft, a gear ring portion is provided on the outer peripheral wall of the rotating sleeve, and the intermediate gear is meshed with the driving gear and the gear ring portion; after adopting this transmission assembly, when the servo motor drives the rotating shaft to rotate, the rotating shaft can drive the driving gear to rotate. At this time, when the intermediate gear is meshed with the driving gear and the gear ring portion, the driving gear can drive the rotating sleeve to rotate relative to the support sleeve via the intermediate gear. At this time, under the action of the polygonal hole, the plastic material wrapped on the outside of the steel pipe and in a molten state can be twisted. In addition, when the servo motor drives the rotating sleeve to rotate intermittently, the polygonal hole located on the rotating sleeve can achieve intermittent twisting of the plastic material wrapped on the outside of the steel pipe and in a molten state.

[0008] In one possible embodiment, the transmission assembly further includes a driving sprocket, a driven sprocket and a chain; the driving sprocket is coaxially fixed to the output shaft of the servo motor, the driven sprocket is coaxially fixed to one end of the rotating shaft, and the chain is sleeved on the driving sprocket and the driven sprocket to enable the driven sprocket to be transmission-connected to the driving sprocket; by adopting this transmission assembly, under the cooperation of the driving sprocket, the driven sprocket and the chain, one end of the rotating shaft can be reliably transmission-connected to the output shaft of the servo motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic diagram of the three-dimensional structure after the support sleeve, rotating sleeve and transmission component are assembled with the extrusion die; Figure 2 This is a schematic diagram of the three-dimensional structure after the support sleeve, rotating sleeve and transmission component are assembled; Figure 3 The figure is a schematic diagram of the structure after the servo motor, driving sprocket, chain and driven sprocket are connected; Figure 4 This is a structural diagram of the plastic-coated steel pipe after twisting. DETAILED DESCRIPTION

[0010] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of the present application and are not intended to limit the scope of protection of the embodiments of the present application. Those skilled in the art may adjust them as needed to suit specific application scenarios.

[0011] In the description of the embodiments of this application, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of this application based on the specific circumstances.

[0012] In the embodiments of the present application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0013] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0014] See also Figure 1-4 As shown, the embodiment of the present application discloses a plastic-coated steel pipe twisting device, including an extrusion die 1 installed on an extruder, the extrusion die 1 is used for continuously allowing the steel pipe to pass through and continuously plastic-coating the steel pipe; the plastic-coated steel pipe twisting device also includes a support sleeve 2, a rotating sleeve 3, a transmission assembly and a servo motor 4; the support sleeve 2 is fixed on the discharge side of the extrusion die 1, and the rotating sleeve 3 is rotatably connected to the inner side of the support sleeve 2, and a polygonal hole 31 is coaxially provided in the middle part of the rotating sleeve 3, and the polygonal hole 31 is used for allowing the steel pipe to pass through and to fit with the gap of the steel pipe; the transmission assembly is connected to the support sleeve 2, and the input end of the transmission assembly is transmission-connected to the servo motor 4, and the output end of the transmission assembly is transmission-connected to the support sleeve 2; the servo motor 4 is used to drive the rotating sleeve 3 to rotate intermittently relative to the steel pipe via the transmission assembly.

[0015] A conical material guide portion 32 is coaxially provided on the inner side of the rotating sleeve 3. The material guide portion 32 is used to guide the molten plastic material to the polygonal hole 31 and allow the plastic material to be wrapped around the outer peripheral wall of the steel pipe. By adopting this structure, under the action of the material guide portion, the material guide portion can guide the plastic material in a molten state from the extrusion die to the polygonal hole and allow the plastic material to be reliably wrapped around the outer peripheral wall of the steel pipe.

[0016] The transmission assembly includes a rotating shaft 51, a driving gear 52 and an intermediate gear 53; the rotating shaft 51 is arranged in the support sleeve 2 and is rotatably connected to the support sleeve 2, one end of the rotating shaft 51 is transmission-connected to the servo motor 4, the driving gear 52 is coaxially fixed to the other end of the rotating shaft 51, and the intermediate gear 53 is rotatably connected to the support sleeve 2 through a support shaft 54. A ring gear portion 33 is provided on the outer peripheral wall of the rotating sleeve 3, and the intermediate gear 53 is meshed with both the driving gear 52 and the ring gear portion 33; after adopting this transmission assembly, when the servo motor drives the rotating shaft to rotate, the rotating shaft can drive the driving gear to rotate. At this time, when the intermediate gear is meshed with the driving gear and the ring gear portion, the driving gear can drive the rotating sleeve to rotate relative to the support sleeve via the intermediate gear. At this time, under the action of the polygonal hole, the plastic material wrapped on the outside of the steel pipe and in a molten state can be twisted. In addition, when the servo motor drives the rotating sleeve to rotate intermittently, the polygonal hole located on the rotating sleeve can achieve intermittent twisting of the plastic material wrapped on the outside of the steel pipe and in a molten state.

[0017] The transmission assembly also includes a driving sprocket 55, a driven sprocket 56 and a chain 57; the driving sprocket 55 is coaxially fixed to the output shaft of the servo motor 4, the driven sprocket 56 is coaxially fixed to one end of the rotating shaft 51, and the chain 57 is sleeved on the driving sprocket 55 and the driven sprocket 56 to enable the driven sprocket 56 to be transmission-connected to the driving sprocket 55; by adopting this transmission assembly, under the cooperation of the driving sprocket, the driven sprocket and the chain, one end of the rotating shaft can be reliably transmission-connected to the output shaft of the servo motor.

[0018] When the present invention is working, the steel pipe can be continuously conveyed to the extrusion die through the conveying mechanism and continuously extended from the extrusion die, and the extruder can continuously wrap the molten plastic material onto the outer peripheral wall of the steel pipe through the extrusion die, so that a plastic wrapping layer is formed on the outer peripheral wall of the steel pipe; when the steel pipe continues to pass through the extrusion die and the extrusion die continuously wraps the steel pipe with plastic, when the servo motor drives the rotating sleeve to rotate through the transmission component, the molten plastic material wrapped on the outer peripheral wall of the steel pipe can be twisted by the polygonal holes located on the rotating sleeve to form a twisted plastic-coated steel pipe; and when the servo motor intermittently drives the rotating sleeve to rotate, the twisting and non-twisting of the plastic-coated steel pipe can be controlled to form the following Figure 4 The plastic-coated steel pipe shown is partially twisted.

[0019] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A plastic-coated steel pipe twisting device, comprising an extrusion die (1) mounted on an extruder, wherein the extrusion die (1) is used for continuously passing the steel pipe through and continuously coating the steel pipe with plastic; characterized in that: The plastic-coated steel pipe twisting device further comprises a support sleeve (2), a rotating sleeve (3), a transmission assembly and a servo motor (4); the support sleeve (2) is fixed on the discharge side of the extrusion die (1), the rotating sleeve (3) is rotatably connected to the inner side of the support sleeve (2), and a polygonal hole (31) is coaxially provided in the middle of the rotating sleeve (3), and the polygonal hole (31) is used for allowing the steel pipe to pass through and to fit the gap with the steel pipe; the transmission assembly is connected to the support sleeve (2), the input end of the transmission assembly is transmission-connected to the servo motor (4), and the output end of the transmission assembly is transmission-connected to the support sleeve (2); the servo motor (4) is used to drive the rotating sleeve (3) to rotate intermittently relative to the steel pipe via the transmission assembly.

2. The plastic-coated steel pipe twisting device according to claim 1, characterized in that: A conical material guide portion (32) is coaxially provided on the inner side of the rotating sleeve (3), and the material guide portion (32) is used to guide the molten plastic material to the polygonal hole (31) and allow the plastic material to wrap around the outer peripheral wall of the steel pipe.

3. The plastic-coated steel pipe twisting device according to claim 1 or 2, characterized in that: The transmission assembly comprises a rotating shaft (51), a driving gear (52) and an intermediate gear (53); the rotating shaft (51) is inserted into the support sleeve (2) and is rotatably connected to the support sleeve (2); one end of the rotating shaft (51) is transmission-connected to the servo motor (4); the driving gear (52) is coaxially fixed to the other end of the rotating shaft (51); the intermediate gear (53) is rotatably connected to the support sleeve (2) via a support shaft (54); a gear ring portion (33) is provided on the outer peripheral wall of the rotating sleeve (3); and the intermediate gear (53) is meshed with both the driving gear (52) and the gear ring portion (33).

4. The plastic-coated steel pipe twisting device according to claim 3, characterized in that: The transmission assembly further comprises a driving sprocket (55), a driven sprocket (56) and a chain (57); the driving sprocket (55) is coaxially fixed to the output shaft of the servo motor (4), the driven sprocket (56) is coaxially fixed to one end of the rotating shaft (51), and the chain (57) is sleeved on the driving sprocket (55) and the driven sprocket (56) to enable the driven sprocket (56) to be transmission-connected to the driving sprocket (55).

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