Novel plastic pipe rounding mechanism

Abstract

The utility model discloses a novel plastic pipe fitting rounding mechanism, including fixedly installed in the downstream of plastic pipe extruder fixed sleeve, the inner wall of fixed sleeve is equidistantly installed with a plurality of and support the support roller of plastic pipe outwall vertical on the opposite surface of plastic pipe, and the support roller is provided with a plurality of groups along the plastic pipe axis direction in the fixed sleeve inside, the inside fixed mounting of fixed sleeve is sleeved and is installed in the annular spray pipe of plastic pipe outside, and equidistantly installed with a plurality of towards the spray nozzle of plastic pipe surface on the spray pipe. The utility model discloses a plurality of support rollers are set up along the circumference on the outside of plastic pipe, and the plastic pipe is supported comprehensively in 360 degrees, and the deformation caused by gravity is offset, and the spray nozzle of spray pipe sprays water, on one hand, plays the role of cooling and setting, on the other hand, also plays the role of lubrication, after the support roller limiting and water -cooling setting, basically can guarantee that the plastic pipe cross section keeps higher roundness, reaches the effect of online rounding.

Description

Technical Field

[0001] This utility model relates to the field of plastic pipe shaping technology, specifically a novel plastic pipe rounding mechanism. Background Technology

[0002] Plastic pipe fittings are extruded from the die of an extruder. After cooling and shaping, they become finished plastic pipe fittings. When they are first extruded, their temperature is high and they have not yet cooled, and their shape and structure are not yet fixed. If no intervention is taken at this stage, inconsistent pipe wall curvature can easily occur, as shown in the instruction manual. Figure 6 As shown, plastic pipe fittings are subjected to downward gravity, which can easily cause the upper part to sink and squeeze the lower part, resulting in an increase in the transverse dimension and a decrease in the longitudinal dimension of the internal cross-section of the pipe fitting.

[0003] When the cross-section of a plastic pipe fitting is not round, it can cause difficulties in connection and installation, or even affect the sealing performance and use. In existing equipment, the conveyor downstream of the extruder only supports the bottom of the plastic pipe fitting, which can easily lead to the pipe fitting having an out-of-round cross-section, especially for some pipe fittings with small wall thickness and large diameter. In this case, it is necessary to round the pipe fitting before shaping. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a novel plastic pipe rounding mechanism to solve the problem of non-circular cross-sections caused by the lack of lateral support and gravity when plastic pipes with small wall thickness and large diameter are freshly extruded and not yet shaped.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A novel plastic pipe fitting rounding mechanism includes a fixed sleeve fixedly installed downstream of a plastic pipe extruder. The plastic pipe passes through the fixed sleeve laterally. Multiple support rollers perpendicular to the opposite plane of the plastic pipe and supported on the outer wall of the plastic pipe are installed at equal intervals along the circumference of the inner wall of the fixed sleeve. Multiple sets of support rollers are arranged inside the fixed sleeve along the axial direction of the plastic pipe. The fixed sleeve has an annular spray pipe that is sleeved on the outside of the plastic pipe. Multiple spray nozzles facing the surface of the plastic pipe are installed at equal intervals on the spray pipe. There are multiple sets of spray pipes and spray nozzles, which are respectively set on the upstream side of multiple sets of corresponding support rollers.

[0006] Preferably, the support rollers are installed inside the fixed sleeve via mounting bases, and there are at least four sets of support rollers. The distance between two adjacent support rollers is less than the length of the support rollers, and the adjacent sets of support rollers are staggered.

[0007] Preferably, a water inlet pipe connected to the spray pipe is installed through the fixed sleeve, and a pressure gauge and a throttle valve are installed on the water inlet pipe, with the pressure gauge located on the side of the throttle valve closer to the spray pipe.

[0008] Preferably, the number of spray nozzles is not less than the number of support rollers, the spray nozzles are inclined, and the axis of the spray nozzles is tangent to the surface of the support rollers near the plastic tube.

[0009] Preferably, the fixed sleeve is further provided with multiple observation windows, which are located on the front and back of the fixed sleeve and between two adjacent sets of spray pipes and support rollers.

[0010] Preferably, the observation window includes a connecting pipe that is vertically fixed to the outer wall of the fixed sleeve, the fixed sleeve having a through hole at the position corresponding to the connecting pipe, and the end of the connecting pipe having a transparent glass plate and an annular sealing end cap that is fixed by a threaded connection.

[0011] Preferably, a water trough is provided below the fixed sleeve, the edge height of the water trough is higher than the bottom height of the fixed sleeve, and clearance grooves are provided on both sides of the water trough corresponding to the position of the plastic pipe. An overflow outlet and a water outlet are provided on the side of the water trough corresponding to the upstream of the plastic pipe.

[0012] Compared with the prior art, the present invention has the following beneficial effects: This invention provides 360-degree support for the plastic tube by arranging multiple sets of support rollers circumferentially on the outside of the tube, thus counteracting deformation caused by gravity. Simultaneously, water is sprayed from the nozzles of the spray pipe, serving both a cooling and shaping function and a lubricating effect, preventing scratches on the support rollers. After the support rollers limit the shape and water cooling sets the shape, the plastic tube cross-section can maintain a high degree of roundness, achieving online rounding. This solves the problem of non-round cross-sections caused by the lack of lateral support and gravity when plastic tubes with thin walls and large diameters are first extruded and not yet set. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the fixed sleeve of this utility model; Figure 3 This is a side view of the corresponding position of the support roller of this utility model; Figure 4 This is a side view of the corresponding position of the spray pipe of this utility model; Figure 5 This is a side sectional view of the corresponding position of the observation window of this utility model; Figure 6 This is a force analysis diagram for an existing plastic tube with only bottom support.

[0014] In the diagram: 1. Plastic pipe; 2. Fixing sleeve; 3. Support roller; 4. Spray pipe; 5. Spray nozzle; 6. Mounting base; 7. Inlet pipe; 8. Pressure gauge; 9. Throttling valve; 10. Observation window; 101. Connecting pipe; 102. Transparent glass plate; 103. Sealing end cap; 11. Through hole; 12. Water tank; 13. Leaving groove; 14. Overflow outlet; 15. Water outlet. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] like Figure 1-5 As shown, this utility model provides a technical solution: a novel plastic pipe fitting rounding mechanism, including a fixed sleeve 2 fixedly installed downstream of the extruder of the plastic pipe 1, the plastic pipe 1 passing through the fixed sleeve 2 laterally, and multiple support rollers 3 equidistantly installed on the inner wall of the fixed sleeve 2 along the circumferential direction, perpendicular to the opposite plane of the plastic pipe 1 and supported on the outer wall of the plastic pipe 1, and multiple sets of support rollers 3 arranged inside the fixed sleeve 2 along the axial direction of the plastic pipe 1, the support rollers 3 being installed inside the fixed sleeve 2 through mounting seats 6, the support rollers 3 having at least four sets, the distance between two adjacent support rollers 3 being less than the length of the support roller 3, and the adjacent sets of support rollers 3 being staggered, providing 360-degree comprehensive support for the plastic pipe 1 and counteracting the deformation caused by gravity.

[0017] An annular spray pipe 4 is fixedly installed inside the fixed sleeve 2, which is sleeved on the outside of the plastic pipe 1. The spray pipe 4 is fixed by a fixed pipe clamp (not shown in the figure). Multiple spray nozzles 5 are installed on the spray pipe 4 at equal intervals, facing the surface of the plastic pipe 1. There are multiple sets of spray pipes 4 and spray nozzles 5, which are respectively set on the upstream side of multiple sets of corresponding support rollers 3. The number of spray nozzles 5 is not less than the number of support rollers 3. The spray nozzles 5 are set at an angle, and the axis of the spray nozzles 5 is tangent to the surface of the support roller 3 on the side close to the plastic pipe 1. Water is sprayed by the spray nozzles 5 of the spray pipe 4 to cool, shape and lubricate, and to avoid deformation and scratches on the support roller 3.

[0018] A water inlet pipe 7, connected to the spray pipe 4, is installed through the fixed sleeve 2. A pressure gauge 8 and a throttle valve 9 are installed on the water inlet pipe 7. The pressure gauge 8 is located on the side of the throttle valve 9 closest to the spray pipe 4, which can adjust the water flow and pressure. A water tank 12 is set below the fixed sleeve 2. The edge of the water tank 12 is higher than the bottom of the fixed sleeve 2. A clearance groove 13 is set on both sides of the water tank 12 at the position corresponding to the plastic pipe 1. An overflow port 14 and a water outlet 15 are set on the side of the water tank 12 corresponding to the upstream of the plastic pipe 1. The overflow port 14 and the water outlet 15 are both connected to the circulation pump through a return pipe, and then connected to the water inlet pipe 7 to realize water circulation, cooling and shaping. For situations where the water temperature requirement is relatively high, a chiller can be used instead of the above-mentioned circulation pump. The chiller has a built-in circulation pump. The specific connection method can be determined according to the situation.

[0019] The fixed sleeve 2 is also provided with multiple observation windows 10. The observation windows 10 are located on the front and back of the fixed sleeve 2 and between two adjacent sets of spray pipes 4 and support rollers 3. The observation window 10 includes a connecting pipe 101 that is vertically fixed to the outer wall of the fixed sleeve 2. The fixed sleeve 2 is provided with a through hole 11 corresponding to the position of the connecting pipe 101. The end of the connecting pipe 101 is provided with a transparent glass sheet 102 and is installed and fixed by a threaded annular sealing end cap 103. The transparent glass sheet 102 is explosion-proof glass. It can be observed from the outside of the fixed sleeve 2 to see whether the water film on the surface of the plastic pipe 1 is uniform and to determine whether there is a clogging fault of the spray nozzle 5. The vertical setting of the transparent glass sheet 102 and the setting of the connecting pipe 101 can avoid water droplets hanging on the transparent glass sheet 102 from affecting the observation.

[0020] The plastic tube 1, extruded through the die, is conveyed from left to right by the extruder. As it passes through the fixed sleeve 2, it is supported by multiple sets of support rollers 3 arranged circumferentially inside, providing 360-degree support. At the same time, water is sprayed by the spray nozzles 5 of the spray pipe 4, which serves to cool, shape, and lubricate the tube, counteracting the deformation caused by gravity and preventing scratches from the support rollers 3. After being limited by the support rollers 3 and water-cooled, the plastic tube 1 maintains a high degree of roundness, achieving online rounding. Excess water is collected in the water tank 12 and can be reused.

[0021] In this invention, all components are regularly inspected and maintained according to actual production conditions, and all vulnerable parts are replaced during maintenance according to wear and tear and usage time to ensure normal operation.

Claims

1. A novel plastic pipe fitting rounding mechanism, characterized in that: The device includes a fixed sleeve (2) that is fixedly installed downstream of the extruder of the plastic tube (1). The plastic tube (1) passes through the fixed sleeve (2) laterally. Multiple support rollers (3) that are perpendicular to the plastic tube (1) and supported on the outer wall of the plastic tube (1) are installed at equal intervals along the circumference of the inner wall of the fixed sleeve (2). Multiple sets of support rollers (3) are arranged inside the fixed sleeve (2) along the axial direction of the plastic tube (1). The fixed sleeve (2) has an annular spray pipe (4) that is sleeved on the outside of the plastic pipe (1). Multiple spray nozzles (5) facing the surface of the plastic pipe (1) are installed equidistantly on the spray pipe (4). There are multiple sets of spray pipes (4) and spray nozzles (5) and they are respectively set on the upstream side of multiple sets of corresponding support rollers (3).

2. The novel plastic pipe fitting rounding mechanism according to claim 1, characterized in that: The support roller (3) is installed inside the fixed sleeve (2) by the mounting base (6). There are at least four sets of support rollers (3). The distance between two adjacent support rollers (3) is less than the length of the support roller (3), and the two adjacent sets of support rollers (3) are staggered.

3. The novel plastic pipe fitting rounding mechanism according to claim 1, characterized in that: A water inlet pipe (7) connected to the spray pipe (4) is installed through the fixed sleeve (2). A pressure gauge (8) and a throttle valve (9) are installed on the water inlet pipe (7). The pressure gauge (8) is located on the side of the throttle valve (9) close to the spray pipe (4).

4. The novel plastic pipe fitting rounding mechanism according to claim 1, characterized in that: The number of spray nozzles (5) is not less than the number of support rollers (3). The spray nozzles (5) are inclined and the axis of the spray nozzles (5) is tangent to the surface of the support rollers (3) on the side near the plastic tube (1).

5. The novel plastic pipe fitting rounding mechanism according to claim 1, characterized in that: The fixed sleeve (2) is also provided with a plurality of observation windows (10), which are located on the front and back of the fixed sleeve (2) and between two adjacent sets of spray pipes (4) and support rollers (3).

6. The novel plastic pipe fitting rounding mechanism according to claim 1, characterized in that: The observation window (10) includes a connecting pipe (101) that is vertically fixed to the outer wall of the fixed sleeve (2). The fixed sleeve (2) is provided with a through hole (11) at the position corresponding to the connecting pipe (101). The end of the connecting pipe (101) is provided with a transparent glass plate (102) and is installed and fixed by a threaded annular sealing end cap (103).

7. The novel plastic pipe fitting rounding mechanism according to claim 1, characterized in that: A water tank (12) is provided below the fixed sleeve (2). The edge height of the water tank (12) is higher than the bottom height of the fixed sleeve (2). A clearance groove (13) is provided on both sides of the water tank (1) corresponding to the position of the plastic pipe (1). An overflow outlet (14) and a water outlet (15) are provided on the side of the water tank (12) corresponding to the upstream of the plastic pipe (1).

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