Cooling and shaping device for metal plastic-coated pipe

Abstract

The utility model relates to the technical field of pipe cooling forming, in particular to a cooling shaping device of a metal plastic-coated pipe, which comprises an upper water inlet outer cover and a lower water inlet outer cover, and an upper cooling cavity is formed between an upper shaping semi-ring and the upper water inlet outer cover; a lower cooling cavity is formed between the lower shaping semi-ring and the lower water inlet outer cover, the upper shaping semi-ring and the lower shaping semi-ring are aligned to form a shaping ring, an inner cavity of the upper water inlet outer cover is divided into an upper water inlet cavity and an upper water outlet cavity, and an upper flow inlet, the upper cooling cavity, an upper flow outlet, the upper water outlet cavity and the upper water outlet in the upper water inlet outer cover are sequentially communicated. And the structure of the lower water inlet outer cover is the same as that of the upper water inlet outer cover. The cooling and shaping device for the metal plastic-coated pipe not only can cool and shape the metal plastic-coated pipe, but also can calender and distribute a plastic-coated layer on the outer surface of the metal plastic-coated pipe again in the cooling process, so that the thickness of the plastic-coated layer on the outer surface of the metal plastic-coated pipe is uniform; and the binding force between the coating plastic pipe and the metal pipe is more uniform and stable.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe cooling and forming, and more specifically, to a cooling and forming device for a metal plastic-coated pipe. Background Art

[0002] The inner tube of a metal-coated plastic pipe is a thin-walled metal pipe, and the outer tube is a thin-walled clad plastic pipe. The clad plastic pipe is adhered to the outer wall of the thin-walled metal pipe. During the production of metal-coated plastic pipe, the metal pipe is first processed, and then the outer surface of the formed metal pipe is coated with plastic. The coated metal pipe is then cooled and formed, so that the clad plastic pipe can adhere to the outer surface of the metal pipe.

[0003] In existing technologies, when metal plastic-coated tubes are cooled and formed after coating, most often the forming method is spraying or immersion in a water tank. During this forming process, the plastic coating on the metal tube has not yet fully solidified and easily flows onto the metal tube during the forming process, resulting in uneven thickness of the coated plastic tube after cooling and forming, and poor outer surface quality. Furthermore, because the plastic coating is not compacted and formed during the cooling and forming process, the plastic coating in the plastic coating flows, resulting in significant differences in the bond strength between the formed coated plastic tube and the metal tube at various points, resulting in inconsistent bonding forces. Utility Model Content

[0004] The purpose of the present utility model is to overcome the shortcomings in the prior art that when the coating of the metal plastic-coated tube is cooled and shaped, the plastic coating material of the plastic coating layer is prone to flow, resulting in poor outer surface quality of the metal plastic-coated tube and inconsistent bonding forces between the coated plastic tube and the metal tube at various points. A cooling and shaping device for the metal plastic-coated tube is provided, which can ensure that the thickness of the coated plastic tube is uniform after forming and the bonding forces between the coated plastic tube and the metal tube are uniform when the metal plastic-coated tube is cooled and shaped.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] Provided is a cooling and shaping device for a metal-coated plastic pipe, comprising a detachably connected upper water inlet outer cover and a lower water inlet outer cover, wherein an upper shaping half-ring is fixedly mounted on the upper water inlet outer cover, and a gap between the upper shaping half-ring and the inner side wall of the upper water inlet outer cover is an upper cooling cavity; wherein a lower shaping half-ring is fixedly mounted on the lower water inlet outer cover, and a gap between the lower shaping half-ring and the inner side wall of the lower water inlet outer cover is a lower cooling cavity, wherein the upper shaping half-ring and the lower shaping half-ring are aligned to form a shaping half-ring for allowing the metal-coated plastic pipe to pass through ... The inner cavity of the water inlet outer cover is provided with an upper partition plate, which divides the inner cavity of the upper water inlet outer cover into an upper water inlet chamber and an upper water outlet chamber that are not connected to each other. The outer side wall of the upper water inlet outer cover is provided with an upper water inlet and an upper water outlet, and the inner side wall of the upper water inlet outer cover is provided with an upper flow inlet and an upper flow outlet. The upper water inlet, the upper water inlet chamber, the upper flow inlet, the upper cooling chamber, the upper flow outlet, the upper water outlet chamber, and the upper water outlet are connected in sequence, and the structure of the lower water inlet outer cover is the same as that of the upper water inlet outer cover.

[0007] The present invention provides a cooling and shaping device for a metal-coated plastic pipe. When in use, cold water is injected into the upper water inlet housing and the lower water inlet housing. Water enters the upper water inlet cavity through the upper water inlet on the upper water inlet housing. After the upper water inlet cavity is filled with water, the water flows along the upper inlet into the upper cooling cavity. After the upper cooling cavity is filled with water, the water flows along the upper outlet into the upper water outlet cavity. Then, the water in the water outlet cavity flows out from the upper outlet. Similarly, the water entering the lower water inlet housing from the lower water inlet flows sequentially through the lower water inlet cavity, the lower inlet, the lower cooling cavity, the lower outlet, and the lower water outlet cavity, and flows out from the lower outlet. The metal plastic-coated tube to be cooled and shaped passes through a shaping ring composed of an upper shaping half ring and a lower shaping half ring. The heat on the surface of the metal plastic-coated tube is transferred to the upper shaping half ring and the lower shaping half ring. Then, the heat on the upper shaping half ring and the lower shaping half ring is taken away by the cold water in the upper cooling chamber and the lower cooling chamber, completing the cooling and shaping of the plastic layer on the metal plastic-coated tube. The plastic layer is shaped into a coated plastic tube. In addition, when the plastic coating material in the plastic layer on the outer surface of the metal plastic-coated tube flows, the shaping ring can re-roll and distribute the plastic layer on the outer surface of the metal tube, so that the thickness of the plastic layer on the outer surface of the metal tube is uniform. After the metal plastic-coated tube is formed, the bonding strength between the coated plastic tube and the metal tube at each point is uniform and the bonding force is the same. The metal-coated plastic tube cooling and shaping device in this scheme can not only cool and shape the metal-coated plastic tube, but also re-roll and distribute the plastic layer on the outer surface of the metal-coated plastic tube during the cooling process, so that the thickness of the plastic layer on the outer surface of the metal-coated plastic tube is uniform, and the bonding force between the coated plastic tube and the metal tube is more uniform and stable.

[0008] Furthermore, the axes of the upper water inlet, the upper water outlet, the upper flow inlet, and the upper flow outlet all pass through the center of the upper shaping semi-ring, and the upper water inlet cavity and the upper water outlet cavity, the upper water inlet and the upper water outlet, and the upper flow inlet and the upper flow outlet are all arranged axially symmetrically with the vertical plane passing through the center of the upper shaping semi-ring as the axis of symmetry, the acute angle between the axis of the upper water inlet and the horizontal plane is a, the acute angle between the axis of the upper flow inlet and the horizontal plane is b, and a is at least 30° greater than b. Experiments have shown that the staggered arrangement when the angle difference between the upper water inlet and the axis and the axis of the upper flow inlet is greater than 30°, and the symmetrical arrangement of the water inlet and the water outlet, as well as the flow inlet and the flow outlet, allows cold water to flow into the upper water outlet cavity only after filling the upper cooling cavity, thereby avoiding insufficient water in the cooling cavity leading to poor cooling effect of the plastic coating. It can also reduce the water flow rate, so that the cold water can flow slowly in the upper cooling cavity, which has a better cooling effect on the metal plastic-coated pipe.

[0009] Furthermore, the upper water inlet is equipped with an upper water inlet nozzle, the other end of which is connected to the water inlet pipe. The upper water outlet is equipped with an upper water outlet nozzle, the other end of which is connected to the water outlet pipe. The water inlet and outlet of the upper water inlet housing are equipped with nozzles, which are connected to the water inlet and outlet pipes through the nozzles. The nozzles can be inserted into the water pipes, making connection convenient. Similarly, the lower water inlet is also equipped with an inlet nozzle, and the lower water outlet is also equipped with a water outlet nozzle.

[0010] Furthermore, the lower half-ring is provided with a semi-cylindrical positioning protrusion, and the upper half-ring is provided with a semi-circular positioning groove. The positioning protrusion is located within the positioning groove, and the outer wall of the positioning protrusion can be aligned with the inner wall of the positioning groove. The arrangement of the positioning protrusion and positioning groove allows for precise positioning of the upper and lower half-rings. The semi-circular shape of the positioning protrusion makes it easier to snap the positioning protrusion into the positioning groove.

[0011] Furthermore, the positioning protrusion includes a first positioning protrusion and a second positioning protrusion, the first positioning protrusion and the second positioning protrusion are respectively located on both sides of the lower shaping semi-ring, the axis of the first positioning protrusion is parallel to the axis of the lower shaping semi-ring, and the axis of the second positioning protrusion is perpendicular to the axis of the lower shaping semi-ring, and the positioning groove includes a first positioning groove and a second positioning groove, the first positioning protrusion is located in the first positioning groove, and the second positioning protrusion is located in the second positioning groove. The first positioning protrusion can limit the movement of the upper shaping semi-ring on the lower shaping semi-ring along its axis, and the second positioning protrusion can limit the movement of the upper shaping semi-ring on the lower shaping semi-ring in a direction perpendicular to its axis, so that the upper shaping semi-ring and the lower shaping semi-ring can be precisely aligned.

[0012] Furthermore, the upper water inlet housing is provided with connecting pieces on both sides, each of which has a mounting hole. The connecting pieces at both ends of the upper water inlet housing are aligned with the connecting pieces at both ends of the lower water inlet housing, and locking bolts are inserted through the mounting holes of the two aligned connecting pieces and locked. The upper and lower water inlet housings are locked together by the connecting pieces and locking bolts. The degree of tightening of the locking bolts can also be adjusted according to the different wall thicknesses of the plastic-coated metal pipes, thereby adjusting the size of the gap between the upper and lower water inlet half rings. This ensures a good re-extending and distributing effect for plastic-coated metal pipes of different wall thicknesses.

[0013] Furthermore, the device further includes fixing screws. Fixing holes are provided on the end surfaces of the upper shaping half-ring and the upper water inlet housing. The fixing screws pass through the fixing holes in the upper shaping half-ring and the upper water inlet housing and threadably engage with the holes. The fixing screws secure the upper shaping half-ring to the upper water inlet housing, providing a strong and convenient connection. Similarly, the lower shaping half-ring and the lower water inlet housing are also connected via fixing screws.

[0014] Furthermore, the device further includes positioning pins. Positioning holes are provided on the end surfaces of the upper shaping half-ring and the upper water inlet housing. The positioning pins pass through the positioning holes in the upper shaping half-ring and the upper water inlet housing. The provision of the positioning pins ensures the positioning accuracy of the upper shaping half-ring on the upper water inlet housing, allowing for precise alignment of the upper and lower shaping half-rings after the upper and lower water inlet housings are connected. Similarly, the lower water inlet housing is also provided with positioning pins that pass through the lower water inlet housing and the lower shaping half-ring.

[0015] Furthermore, the connection between the upper water inlet housing and the upper shaping half-ring is coated with sealant. This sealant ensures a tight seal between the upper shaping half-ring and the upper water inlet housing, preventing water leakage from the upper cooling chamber. Similarly, the connection between the lower water inlet housing and the lower shaping half-ring is also coated with sealant.

[0016] Furthermore, the roughness of the inner cavity of the sizing ring is 0.1 μm. When the metal plastic-coated tube passes through the sizing ring, the inner sidewall of the sizing ring rubs against the outer surface of the metal plastic-coated tube, thereby improving the outer wall of the metal plastic-coated tube. The roughness of the inner cavity of the sizing ring is 0.1 μm. After friction with the sizing ring, the outer surface of the metal plastic-coated tube can be smooth and flat.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] The metal-plastic-coated pipe cooling and shaping device of the present invention can not only cool and shape the metal-plastic-coated pipe, but also re-roll and distribute the plastic coating layer on the outer surface of the metal-plastic-coated pipe during the cooling process, so that the thickness of the plastic coating layer on the outer surface of the pipe is uniform, and the bonding force between the coated plastic pipe and the metal pipe is more uniform and stable.

[0019] The staggered arrangement of the upper inlet and upper water inlet in the metal-coated plastic pipe cooling and shaping device of the present invention, as well as the symmetrical arrangement of the water inlet and outlet, ensure that cold water can flow into the upper water outlet chamber only after the upper cooling chamber is filled, thus avoiding insufficient water in the cooling chamber and resulting in poor cooling effect. Furthermore, the water flow rate can be reduced, allowing the cold water to flow slowly in the upper cooling chamber, thereby achieving a better cooling effect on the metal-coated plastic pipe.

[0020] The metal-plastic-coated tube cooling and shaping device of the present invention is provided with two positioning protrusions on the lower shaping half ring, which are respectively parallel to the axis of the upper shaping half ring and perpendicular to the axis of the upper shaping half ring, so as to prevent the upper shaping half ring from sliding on the lower shaping half ring, so that the upper shaping half ring and the lower shaping half ring can be accurately aligned. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the internal structure of a cooling and shaping device for a metal-coated plastic pipe;

[0022] Figure 2 This is an exploded view of a cooling and shaping device for a metal-coated plastic pipe;

[0023] Figure 3 A cross-sectional view of a metal-coated plastic tube.

[0024] In the accompanying drawings: 1. Upper water inlet cover; 2. Lower water inlet cover; 3. Upper shaping half ring; 4. Lower shaping half ring; 5. Upper cooling chamber; 6. Lower cooling chamber; 7. Upper partition plate; 8. Upper water inlet chamber; 9. Upper water outlet chamber; 101. Upper water inlet; 102. Upper water outlet; 103. Upper inlet; 104. Upper outlet; 10. Upper water inlet nozzle; 11. Upper water outlet nozzle; 401. First positioning protrusion; 402. Second positioning protrusion; 12. Connecting plate; 121. Mounting hole; 13. Locking bolt; 14. Fixing screw; 15. Positioning pin; 16. Positioning hole; 100. Metal pipe; 200. Coated plastic pipe. DETAILED DESCRIPTION

[0025] The present invention is further described below in conjunction with specific embodiments. The accompanying drawings are for illustrative purposes only and are schematic, not actual, representations. They should not be construed as limiting this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted from the drawings.

[0026] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right" and so on indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0027] Example 1

[0028] This embodiment is the first embodiment of a cooling and shaping device for a metal-coated plastic pipe. Figure 1-Figure 2 As shown, it includes a detachably connected upper water inlet outer cover 1 and a lower water inlet outer cover 2. An upper shaping semi-ring 3 is fixedly installed on the upper water inlet outer cover 1. The gap between the upper shaping semi-ring 3 and the inner side wall of the upper water inlet outer cover 1 is an upper cooling cavity 5; a lower shaping semi-ring 4 is fixedly installed on the lower water inlet outer cover 2. The gap between the lower shaping semi-ring 4 and the inner side wall of the lower water inlet outer cover 2 is a lower cooling cavity 6. The upper shaping semi-ring 3 and the lower shaping semi-ring 4 are aligned to form a shaping semi-ring for the metal plastic-coated tube to pass through. The inner cavity of the upper water inlet outer cover 1 is provided with an upper partition plate. 7. The upper partition plate 7 divides the inner cavity of the upper water inlet outer cover 1 into an upper water inlet chamber 8 and an upper water outlet chamber 9 which are not connected to each other. An upper water inlet 101 and an upper water outlet 102 are provided on the outer wall of the upper water inlet outer cover 1, and an upper inlet 103 and an upper outlet 104 are provided on the inner wall of the upper water inlet outer cover 1. The upper water inlet 101, the upper water inlet chamber 8, the upper inlet 103, the upper cooling chamber 5, the upper outlet 104, the upper water outlet chamber 9, and the upper water outlet 102 are connected in sequence. The structure of the lower water inlet outer cover 2 is the same as that of the upper water inlet outer cover 1.

[0029] The working principle or working process of this embodiment is as follows: When in use, cold water is injected into the upper water inlet housing 1 and the lower water inlet housing 2, and water enters the upper water inlet chamber 8 through the upper water inlet 101 on the upper water inlet housing 1. After the upper water inlet chamber 8 is filled with water, the water flows along the upper inlet 103 into the upper cooling chamber 5. After the upper cooling chamber 5 is filled with water, the water flows along the upper outlet 104 into the upper water outlet chamber 9, and then the water in the water outlet chamber flows out through the upper outlet 104. Similarly, the water flowing into the lower water inlet housing 2 from the lower water inlet flows through the lower water inlet chamber, the lower inlet, the lower cooling chamber 6, the lower outlet, the lower water outlet chamber in sequence, and flows out from the lower outlet. The metal plastic-coated tube to be cooled and shaped passes through a shaping ring composed of an upper shaping half ring 3 and a lower shaping half ring 4. The heat on the surface of the metal plastic-coated tube is transferred to the upper shaping half ring 3 and the lower shaping half ring 4. Then the heat on the upper shaping half ring 3 and the lower shaping half ring 4 is taken away by the cold water in the upper cooling cavity 5 and the lower cooling cavity 6, completing the cooling and shaping of the plastic layer on the metal plastic-coated tube. The plastic layer is shaped into a coated plastic tube 200. The shaping ring can also extrude the metal plastic-coated tube. When the plastic layer on the outer surface of the metal plastic-coated tube flows, the shaping ring can re-roll and distribute the plastic layer on the outer surface of the metal tube 100, so that the thickness of the plastic layer on the outer surface of the metal tube 100 is uniform. After the metal plastic-coated tube is formed, the bonding strength between the coated plastic tube 200 and each point of the metal tube 100 is uniform, and the bonding force is the same, such as Figure 3 shown.

[0030] The beneficial effects of this embodiment are as follows: the metal-coated plastic tube cooling and shaping device in this scheme can not only cool and shape the metal-coated plastic tube, but also re-roll and distribute the plastic layer on the outer surface of the metal-coated plastic tube during the cooling process, so that the thickness of the plastic layer on the outer surface of the metal-coated plastic tube is uniform, and the bonding force between the coated plastic tube 200 and the metal tube 100 is more uniform and stable.

[0031] Example 2

[0032] This embodiment is a second embodiment of a cooling and shaping device for a metal plastic-coated tube. This embodiment is based on the first embodiment. Figure 1 As shown, the water inlet, water outlet, flow inlet and flow outlet are further defined.

[0033] Specifically, the axes of the upper water inlet 101, upper water outlet 102, upper flow inlet 103, and upper flow outlet 104 all pass through the center of the upper shaping semi-ring 3. The upper water inlet chamber 8 and upper water outlet chamber 9, the upper water inlet 101 and upper water outlet 102, and the upper flow inlet 103 and upper flow outlet 104 are all arranged axially symmetrically with the vertical plane passing through the center of the upper shaping semi-ring 3 as the axis of symmetry. The acute angle between the axis of the upper water inlet 101 and the horizontal plane is a, and the acute angle between the axis of the upper flow inlet 103 and the horizontal plane is b, with a being at least 30° greater than b. The lower water inlet, lower water outlet, lower flow inlet, and lower flow outlet on the lower water inlet housing have the same structure as the upper water inlet 101, upper water outlet 102, upper flow inlet 103, and upper flow outlet 104 in the upper water inlet housing 1.

[0034] Specifically, an upper water inlet 101 is mounted with an upper water inlet nozzle 10, the other end of which is connected to the water inlet pipe, and an upper water outlet nozzle 11 is mounted on the upper water outlet 102, the other end of which is connected to the water outlet pipe. A water inlet nozzle is also provided on the lower water inlet, and a water outlet nozzle is also provided on the lower water outlet.

[0035] The beneficial effects of this embodiment are as follows: the upper water inlet 101 and the axis with the axis of the upper flow inlet 103 are staggered at an angle of 30°, and the symmetrical arrangement of the water inlet and the water outlet, as well as the flow inlet and the flow outlet, allows cold water to flow into the upper water outlet chamber 9 only after filling the upper cooling chamber 5, thus avoiding insufficient water in the cooling chamber resulting in poor cooling effect of the plastic coating. It can also reduce the water flow rate, allowing the cold water to flow slowly in the upper cooling chamber 5, thus achieving a better cooling effect on the metal plastic-coated tube. A water nozzle is provided on the water inlet and the water outlet on the upper water inlet outer cover 1, which is connected to the water inlet pipe and the water outlet pipe through the water nozzle. The water nozzle can be inserted into the water pipe, making the connection convenient.

[0036] Example 3

[0037] This embodiment is a third embodiment of a cooling and shaping device for a metal plastic-coated tube. This embodiment is based on the first and second embodiments. Figure 2 As shown, other structures of the device are further defined.

[0038] Specifically, the lower shaping semi-ring 4 is provided with a semi-cylindrical positioning protrusion, and the upper shaping semi-ring 3 is provided with a semi-circular positioning groove. The positioning protrusion is located in the positioning groove, and the outer wall of the positioning protrusion can be aligned with the inner wall of the positioning groove. The positioning protrusion includes a first positioning protrusion 401 and a second positioning protrusion 402. The first positioning protrusion 401 and the second positioning protrusion 402 are respectively located on either side of the lower shaping semi-ring 4. The axis of the first positioning protrusion 401 is parallel to the axis of the lower shaping semi-ring 4, and the axis of the second positioning protrusion 402 is perpendicular to the axis of the lower shaping semi-ring 4. The positioning groove includes a first positioning groove and a second positioning groove. The first positioning protrusion 401 is located in the first positioning groove, and the second positioning protrusion 402 is located in the second positioning groove.

[0039] Specifically, connecting plates 12 are provided on both sides of the upper water inlet outer cover 1, and mounting holes 121 are provided on the connecting plates 12. The connecting plates 12 at both ends of the upper water inlet outer cover 1 and the connecting plates 12 at both ends of the lower water inlet outer cover 2 are aligned, and the locking bolts 13 pass through the mounting holes 121 on the two aligned connecting plates 12 and are locked.

[0040] Specifically, it also includes fixing screws 14 and locating pins 15. The end faces of the upper shaping half-ring 3 and the upper water inlet housing 1 are both provided with fixing holes. The fixing screws 14 pass through the fixing holes in the upper shaping half-ring 3 and the upper water inlet housing 1 and are threadedly connected to the fixing holes. The end faces of the upper shaping half-ring 3 and the upper water inlet housing 1 are both provided with locating holes 16. The locating pins 15 pass through the locating holes 16 in the upper shaping half-ring 3 and the upper water inlet housing 1. The lower shaping half-ring and the lower water inlet housing are also connected by fixing screws. The lower water inlet housing is also provided with locating pins that pass through the lower water inlet housing and the lower shaping half-ring.

[0041] Specifically, the connection between the upper water inlet outer cover 1 and the upper shaping semi-ring 3 is coated with sealant. The connection between the lower water inlet outer cover and the lower shaping semi-ring is also coated with sealant.

[0042] Specifically, the roughness of the inner cavity of the shaping ring is 0.1 μm.

[0043] The beneficial effects of this embodiment are as follows: The provision of the positioning protrusions and positioning grooves allows for precise positioning of the upper and lower shaping half-rings 3 and 4. The semicircular positioning protrusions facilitate snapping the positioning protrusions into the positioning grooves. The first positioning protrusions 401 restrict movement of the upper shaping half-ring 3 on the lower shaping half-ring 4 along its axis, while the second positioning protrusions 402 restrict movement of the upper shaping half-ring 3 on the lower shaping half-ring 4 perpendicular to its axis, allowing for precise alignment of the upper and lower shaping half-rings 3 and 4.

[0044] The upper water inlet outer cover 1 and the lower water inlet outer cover 2 are locked by the connecting piece 12 and the locking bolt 13. At the same time, the locking degree of the locking bolt 13 can be adjusted according to the metal plastic-coated pipes with different wall thicknesses, and then the size of the gap between the upper water inlet half ring and the lower water inlet half ring can be adjusted, so that the metal plastic-coated pipes with different wall thicknesses can have a good re-extending and distributing effect.

[0045] The upper shaping half ring 3 is fixed to the upper water inlet cover 1 by fixing screws 14, and the connection strength is high and the connection is convenient. The setting of the positioning pin 15 can ensure the positioning accuracy of the upper shaping half ring on the upper water inlet cover 1, so that after the upper water inlet cover 1 and the lower water inlet cover 2 are connected, the upper shaping half ring 3 and the lower shaping half ring 4 can be accurately aligned. After applying the sealant, the sealing between the shaping half ring and the water inlet cover can be ensured to avoid water leakage in the cooling chamber. When the metal plastic-coated tube passes through the shaping ring, the inner side wall of the shaping ring rubs against the outer surface of the metal plastic-coated tube, thereby improving the outer side wall of the metal plastic-coated tube and making the surface of the metal outer side wall smooth and flat.

[0046] In the specific contents of the above-mentioned specific implementation methods, the various technical features can be combined in any non-contradictory manner. In order to make the description concise, not all possible combinations of the above-mentioned technical features are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0047] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. A person skilled in the art will be able to make other variations or modifications based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A cooling and shaping device for metal plastic-coated pipes, characterized in that: The invention comprises an upper water inlet outer cover (1) and a lower water inlet outer cover (2) which are detachably connected. An upper shaping half ring (3) is fixedly mounted on the upper water inlet outer cover (1). The gap between the upper shaping half ring (3) and the inner side wall of the upper water inlet outer cover (1) is an upper cooling cavity (5); a lower shaping half ring (4) is fixedly mounted on the lower water inlet outer cover (2). The gap between the lower shaping half ring (4) and the inner side wall of the lower water inlet outer cover (2) is a lower cooling cavity (6). The upper shaping half ring (3) and the lower shaping half ring (4) are aligned to form a shaping ring for allowing a metal plastic-coated tube to pass through. The inner cavity of the upper water inlet outer cover (1) is provided with an upper partition plate (7), and the upper partition plate (7) divides the inner cavity of the upper water inlet outer cover (1) into an upper water inlet chamber (8) and an upper water outlet chamber (9) which are not connected to each other. The outer side wall of the upper water inlet outer cover (1) is provided with an upper water inlet (101) and an upper water outlet (102), and the inner side wall of the upper water inlet outer cover (1) is provided with an upper flow inlet (103) and an upper flow outlet (104). The upper water inlet (101), the upper water inlet chamber (8), the upper flow inlet (103), the upper cooling chamber (5), the upper flow outlet (104), the upper water outlet chamber (9), and the upper water outlet (102) are connected in sequence. The structure of the lower water inlet outer cover (2) is the same as that of the upper water inlet outer cover (1).

2. The cooling and shaping device for a metal-coated plastic pipe according to claim 1, characterized in that: The axes of the upper water inlet (101), the upper water outlet (102), the upper flow inlet (103) and the upper flow outlet (104) all pass through the center of the upper shaping semi-ring (3); the upper water inlet cavity (8) and the upper water outlet cavity (9), the upper water inlet (101) and the upper water outlet (102), and the upper flow inlet (103) and the upper flow outlet (104) are all arranged in an axisymmetric manner with the vertical plane passing through the center of the upper shaping semi-ring (3) as the axis of symmetry; the acute angle between the axis of the upper water inlet (101) and the horizontal plane is a, and the acute angle between the axis of the upper flow inlet (103) and the horizontal plane is b, and a is at least 30° greater than b.

3. The cooling and shaping device for a metal-coated plastic pipe according to claim 2, characterized in that: An upper water inlet nozzle (10) is installed on the upper water inlet (101), and the other end of the upper water inlet nozzle (10) is used to connect to the water inlet pipe. An upper water outlet nozzle (11) is installed on the upper water outlet (102), and the other end of the upper water outlet nozzle (11) is used to connect to the water outlet pipe.

4. The cooling and shaping device for a metal-coated plastic pipe according to claim 1, characterized in that: The lower shaping half ring (4) is provided with a semi-cylindrical positioning protrusion, and the upper shaping half ring (3) is provided with a semi-circular positioning groove. The positioning protrusion is located in the positioning groove and the outer side wall of the positioning protrusion can be fitted with the inner side wall of the positioning groove.

5. The cooling and shaping device for metal-coated plastic pipe according to claim 4, characterized in that: The positioning protrusion includes a first positioning protrusion (401) and a second positioning protrusion (402), the first positioning protrusion (401) and the second positioning protrusion (402) are respectively located on both sides of the lower shaping semi-ring (4), the axis of the first positioning protrusion (401) is parallel to the axis of the lower shaping semi-ring (4), and the axis of the second positioning protrusion (402) is perpendicular to the axis of the lower shaping semi-ring (4), and the positioning groove includes a first positioning groove and a second positioning groove, the first positioning protrusion (401) is located in the first positioning groove, and the second positioning protrusion (402) is located in the second positioning groove.

6. The cooling and shaping device for metal-coated plastic pipe according to claim 1, characterized in that: Both sides of the upper water inlet outer cover (1) are provided with connecting pieces (12), and the connecting pieces (12) are provided with mounting holes (121). The connecting pieces (12) at both ends of the upper water inlet outer cover (1) and the connecting pieces (12) at both ends of the lower water inlet outer cover (2) are aligned, and the locking bolts (13) pass through the mounting holes (121) on the two aligned connecting pieces (12) and are locked.

7. The cooling and shaping device for metal-coated plastic pipe according to claim 1, characterized in that: It also includes a fixing screw (14), and the end surface of the upper shaping half ring (3) and the end surface of the upper water inlet outer cover (1) are both provided with fixing holes, and the fixing screw (14) passes through the fixing holes on the upper shaping half ring (3) and the upper water inlet outer cover (1) and is threadedly connected to the fixing holes.

8. The cooling and shaping device for metal-coated plastic pipe according to claim 7, characterized in that: It also includes a positioning pin (15), and the end surface of the upper shaping semi-ring (3) and the end surface of the upper water inlet outer cover (1) are both provided with positioning holes (16), and the positioning pin (15) passes through the positioning holes (16) on the upper shaping semi-ring (3) and the upper water inlet outer cover (1).

9. The cooling and shaping device for metal-coated plastic pipe according to claim 8, characterized in that: The connection between the upper water inlet outer cover (1) and the upper shaping semi-ring (3) is coated with sealant.

10. The cooling and shaping device for metal-coated plastic pipe according to claim 1, characterized in that: The roughness of the inner cavity of the shaping ring is 0.1 μm.

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