A cooling device for plastic pipe processing

Abstract

The application relates to the technical field of pipeline processing, in particular to a cooling device for plastic pipeline processing, which comprises a spraying cooling box, a first water inlet branch pipe and a pipeline driven to move in the spraying cooling box, and further comprises: a spraying mechanism arranged on the first water inlet branch pipe and used for supporting the pipeline and spraying and cooling the pipeline; and a center distance adjusting mechanism arranged at the end of the first water inlet branch pipe and used for adjusting the positions of the first water inlet branch pipe and the spraying mechanism. According to the diameter of the pipeline, the position of the spraying mechanism is adjusted through the center distance adjusting mechanism, so that the plurality of spraying mechanisms in the spraying cooling box abut against the outside of the pipeline, stable support of the pipeline during conveying is realized, the distance between the spraying mechanism and the outer surface of the pipeline with different diameters is constant at all times, the cooling water sprayed in a scattering manner can completely act on the surface of the pipeline, and the waste of the cooling water is avoided.

Description

Technical Field

[0001] This invention relates to the field of pipe processing technology, specifically a cooling device for processing plastic pipes. Background Technology

[0002] Plastic pipes are a widely used material in industry, construction, and daily life, favored for their advantages such as lightweight, corrosion resistance, and low cost. Extrusion molding is a key step in the production of plastic pipes, and cooling the pipes during this process is crucial; effective cooling measures can significantly improve the quality and performance of the final product.

[0003] For example, patent CN216267529U discloses a cooling device for PVC pipe extrusion equipment, including a base. A housing is fixedly connected to the top of the base. An inlet and an outlet are respectively located at corresponding positions on the front and rear sides of the housing. A water collection tank is provided on the top of the base, and a grid plate is installed inside the water collection tank. Multiple equidistant support mechanisms are provided on the top of the grid plate, and a water cooling mechanism is located above the support mechanisms and mounted on the housing. This device can support PVC pipes of different diameters, which is beneficial for the use of the cooling device.

[0004] In the prior art of the aforementioned patent, the support roller and the nozzle are fixedly set. When the pipe diameter is small, the nozzle is far from the pipe. At this time, the angle between the nozzle axis and the pipe axis is large. Since the nozzle sprays water in a cone-shaped scattering pattern, this situation will cause the water flow at the edge of the cone-shaped scattering pattern to not fully act on the pipe surface, resulting in some water flow doing useless work. Therefore, a cooling device for plastic pipe processing is urgently needed to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a cooling device for processing plastic pipes, so as to overcome the above-mentioned shortcomings of the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a cooling device for processing plastic pipes, comprising a spray cooling box, a primary inlet branch pipe, and a pipe that is driven to move inside the spray cooling box, and further comprising:

[0007] The spray system, installed on the primary inlet branch pipe, is used to support the pipe and spray it for cooling.

[0008] The center distance adjustment mechanism is located at the end of the primary water inlet branch pipe and is used to adjust the position of the primary water inlet branch pipe and the spraying mechanism.

[0009] The primary water inlet branch pipe is driven by the center distance adjustment mechanism to move the spray mechanism, which can make the spray mechanism press against the outside of pipes of different diameters and keep the distance between the spray mechanism and the outer surface of pipes of different diameters constant. The spray mechanism includes a flow adjustment component, and the opening degree of the flow adjustment component increases with the increase of the pipe diameter.

[0010] Preferably, one end of the spray cooling box is surrounded by a main water inlet ring pipe, which is connected to the primary water inlet branch pipe and is used to supply cooling water to the primary water inlet branch pipe and the spraying mechanism.

[0011] Preferably, the spraying mechanism is arranged in a ring array along the axis of the spray cooling box to form a spraying module, and the spraying modules are arranged in a linear array along the axis of the spray cooling box to form a spraying unit, with the spraying mechanisms in adjacent spraying modules being staggered.

[0012] Preferably, the spraying mechanism includes a fork arm assembly that is retractable by a primary water inlet branch pipe; a flow regulating assembly that can rest against the outside of the pipe and adaptively adjust the opening degree according to the diameter of the pipe; and a transmission assembly for drivingly connecting the fork arm assembly and the flow regulating assembly.

[0013] Preferably, except for the spray mechanism near the end of the spray cooling box, no transmission components are provided on the other spray mechanisms, and a transmission rod is provided on the flow regulating component in the adjacent spray mechanism.

[0014] Preferably, the flow regulating component includes an arc-shaped hollow plate, which is fixedly connected to the fork arm assembly; a water volume regulating slide arm, which is slidably mounted on the arc-shaped hollow plate; the arc-shaped hollow plate is provided with evenly distributed nozzles, and when the fork arm assembly extends or retracts, the water volume regulating slide arm can be driven by the transmission component to slide on the arc-shaped hollow plate to adjust the number of nozzles opening.

[0015] Preferably, the primary water inlet branch pipe is connected to the arc-shaped hollow plate and is used to supply cooling water to the nozzle.

[0016] Preferably, a squeezing slider is provided at one end of the water volume regulating slide arm near the arc-shaped hollow plate, and a lower sealing baffle is provided at one end of the arc-shaped hollow plate near the water volume regulating slide arm, and a squeezing cavity can be formed between the squeezing slider and the lower sealing baffle.

[0017] Preferably, the row of nozzles near the end of the arc-shaped hollow plate away from the water flow regulating slide arm is in a normally open state. The extrusion chamber can cover the other nozzles except for the normally open nozzles. When the water flow regulating slide arm slides on the arc-shaped hollow plate, it can extrude the cooling water in the extrusion chamber into the arc-shaped hollow plate through the nozzles covered by the extrusion chamber.

[0018] Preferably, the center distance adjustment mechanism includes a connecting slider, which is fixedly mounted on the outside of the primary water inlet branch pipe; a positioning slide, used to restrict the position of the connecting slider; and an electric telescopic rod, used to drive the connecting slider and the primary water inlet branch pipe to move.

[0019] In the above technical solution, the beneficial effects of the present invention are as follows: the position of the spraying mechanism is adjusted according to the diameter of the pipe by the center distance adjustment mechanism, so that several spraying mechanisms inside the spray cooling box abut against the outside of the pipe, thereby achieving stable support during pipe transportation. At the same time, the distance between the spraying mechanism and the outer surface of pipes with different diameters remains constant, ensuring that the cooling water sprayed in a scattering pattern can fully act on the pipe surface, avoiding waste of cooling water. The opening degree of the flow adjustment component in the spraying mechanism can be adaptively adjusted according to the diameter of the pipe, ensuring that the cooling intensity is matched with the pipe diameter and improving the finished quality of the pipe.

[0020] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this disclosure.

[0021] This application provides an overview of various implementations or examples of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0023] Figure 1 This is a schematic diagram of the overall assembled structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the internal end structure of the spray cooling box of the present invention;

[0025] Figure 3 This is a schematic diagram showing the installation positions of the center distance adjustment mechanism and the spraying mechanism of the present invention;

[0026] Figure 4 This is a schematic diagram of the connection between adjacent spraying mechanisms of the present invention;

[0027] Figure 5 This is a schematic diagram of the overall structure of the spraying mechanism of the present invention;

[0028] Figure 6 This is a schematic diagram of the connection position between the arc-shaped hollow plate and the water volume regulating sliding arm of the present invention;

[0029] Figure 7 This is a schematic diagram of the structure of the arc-shaped hollow plate of the present invention when it is in contact with the water volume regulating sliding arm;

[0030] Figure 8 This is a schematic diagram of the extrusion cavity formed between the arc-shaped hollow plate and the water volume regulating slide arm of the present invention;

[0031] Figure 9 This is a schematic diagram of the gear transmission component of the present invention;

[0032] Figure 10 This is a schematic diagram of the overall structure of the center distance adjustment mechanism of the present invention.

[0033] Explanation of reference numerals in the attached figures:

[0034] In the diagram: 1. Spray cooling box; 2. Main inlet ring pipe; 3. Primary inlet branch pipe; 4. Center distance adjustment mechanism; 41. Connecting slider; 42. Positioning slide; 43. Electric telescopic rod; 44. Connecting bracket; 5. Spraying mechanism; 51. Fixed fork arm; 52. Movable fork arm; 53. Arc-shaped hollow plate; 54. Water volume adjustment slide arm; 55. Support roller; 56. Nozzle; 57. Gear transmission components; 571. Drive gear; 572. Synchronous pulley one; 573. Synchronous belt; 574. Synchronous pulley two; 575. Driven gear; 58. Drive rack; 59. Transmission rack; 510. Upper positioning block; 511. Lower positioning block; 512. Sealing surface; 513. Secondary inlet branch pipe; 514. Extrusion slider; 515. Lower sealing baffle; 6. Transmission rod; 7. Pipeline. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0036] Please see Figure 1-10 This invention provides a technical solution: a cooling device for processing plastic pipes, comprising a spray cooling box 1, a primary water inlet branch pipe 3, and a pipe 7 that is driven to move inside the spray cooling box 1, and further comprising:

[0037] The spraying mechanism 5 is installed on the primary water inlet branch pipe 3 to support the pipe 7 and spray the pipe 7 for cooling.

[0038] The center distance adjustment mechanism 4 is located at the end of the primary water inlet branch pipe 3 and is used to adjust the position of the primary water inlet branch pipe 3 and the spraying mechanism 5.

[0039] The primary water inlet branch pipe 3 is driven by the center distance adjustment mechanism 4 to move the spray mechanism 5, which can make the spray mechanism 5 press against the outside of pipes 7 of different diameters and keep the distance between the spray mechanism 5 and the outer surface of pipes 7 of different diameters constant. The spray mechanism 5 includes a flow adjustment component, and the opening degree of the flow adjustment component increases with the increase of the diameter of pipe 7.

[0040] Specifically, based on the diameter of pipe 7, the control system in the prior art controls the center distance adjustment mechanism 4 to move the first-stage inlet branch pipe 3 and the spray mechanism 5, adjusting the distance between the spray mechanism 5 and the central axis of the spray cooling box 1, thereby adapting the spacing of the spray mechanisms 5 to the diameter of pipe 7. Pipe 7 is driven to move among the spray mechanisms 5, and the spray mechanisms 5 provide stable support for the moving pipe 7. Cooling water is delivered to the spray mechanisms 5 by the variable frequency water pump in the prior art, and the spray mechanisms 5 spray and cool the moving pipe 7. The spray mechanism 5 can be placed against the outside of pipes 7 of different diameters, so that the distance between the spray mechanism 5 and the outer surface of pipes 7 of different diameters remains constant, ensuring that the cooling water sprayed in a scattering pattern can completely act on the surface of pipe 7. The opening degree of the flow regulation component in the spray mechanism 5 is adaptively adjusted according to the position of the spray mechanism 5. The larger the diameter of pipe 7, the farther the distance between the spray mechanism 5 and the central axis of the spray cooling box 1, the greater the opening degree of the flow regulation component, and the stronger the cooling intensity of the cooling water on pipe 7.

[0041] Compared with the prior art, the present invention adjusts the position of the spraying mechanism 5 according to the diameter of the pipe 7 through the center distance adjustment mechanism 4, so that several spraying mechanisms 5 inside the spray cooling box 1 abut against the outside of the pipe 7, thereby achieving stable support for the pipe 7 during transportation. At the same time, the distance between the spraying mechanism 5 and the outer surface of the pipe 7 of different diameters is always constant, ensuring that the cooling water sprayed in a scattering pattern can fully act on the surface of the pipe 7, avoiding waste of cooling water. The opening degree of the flow adjustment component in the spraying mechanism 5 can be adaptively adjusted according to the diameter of the pipe 7, ensuring that the cooling intensity is adapted to the diameter of the pipe 7, thereby improving the finished product quality of the pipe 7.

[0042] As a preferred technical solution in this embodiment, a main water inlet ring pipe 2 is arranged around one end of the spray cooling box 1, which is connected to the primary water inlet branch pipe 3 for supplying cooling water to the primary water inlet branch pipe 3 and the spraying mechanism 5. Specifically, the primary water inlet branch pipe 3 is evenly distributed inside the spray cooling box 1 and is controlled by the center distance adjustment mechanism 4 to adjust the position of the spraying mechanism 5. The main water inlet ring pipe 2 is connected to the primary water inlet branch pipe 3 through a hose, ensuring that the main water inlet ring pipe 2 is connected to the primary water inlet branch pipe 3 while the position of the primary water inlet branch pipe 3 can be adjusted inside the spray cooling box 1.

[0043] As a preferred technical solution of this embodiment, the spraying mechanism 5 is arranged in a ring array along the axis of the spraying cooling box 1 to form a spraying module, and the spraying module is arranged in a linear array along the axis of the spraying cooling box 1 to form a spraying unit. The spraying mechanisms 5 in adjacent spraying modules are staggered. Specifically, the spraying mechanism 5 is arranged in a linear array along the axis of the spraying cooling box 1 based on the ring array, and the adjacent spraying modules are staggered and complementary. By cooperating with each other, the spraying mechanism 5 can achieve full coverage of the pipe 7, improve the cooling effect of the pipe 7, and provide stable support for the pipe 7 during transportation.

[0044] As a preferred technical solution in this embodiment, the spraying mechanism 5 includes a fork arm assembly, which can retract under the drive of the primary water inlet branch pipe 3; a flow regulating assembly, which can abut against the outside of the pipe 7 and adaptively adjust the opening degree according to the diameter of the pipe 7; and a transmission assembly, which is used to drive the fork arm assembly and the flow regulating assembly. Specifically, the fork arm assembly includes a fixed fork arm 51, which is fixedly installed on the inner wall of the spray cooling box 1; and a movable fork arm 52, which is movably installed on the fixed fork arm 51. One end of the movable fork arm 52 is fixedly connected to the primary water inlet branch pipe 3, and the other end is fixedly connected to the arc-shaped hollow plate 53. When the center distance adjustment mechanism 4 drives the primary water inlet branch pipe 3 to move, the primary water inlet branch pipe 3 can drive the movable fork arm 52 and the arc-shaped hollow plate 53 to move, thereby adjusting the position of the flow regulating assembly. When the movable fork arm 52 moves, the opening degree of the flow regulating assembly can be adjusted through the transmission assembly.

[0045] As a preferred technical solution in this embodiment, except for the spray mechanism 5 near the end of the spray cooling box 1, no transmission components are provided on the other spray mechanisms 5. The flow adjustment components in the adjacent spray mechanisms 5 are provided with transmission rods 6. Specifically, the transmission components include gear transmission components 57, which include a fixedly connected driving gear 571 and a first synchronous pulley 572, both of which are movably installed on the end of the movable fork arm 52 away from the arc-shaped hollow plate 53; a fixedly connected second synchronous pulley 574 and a driven gear 575, both of which are movably installed on the end of the arc-shaped hollow plate 53 near the water flow adjustment sliding arm 54; a synchronous belt 573, which is meshed and fitted on the outside of the first synchronous pulley 572 and the second synchronous pulley 574; the transmission components also include a drive rack 58, which is fixedly installed on the fixed fork arm 51 and is connected to the main gear 571. The moving gears 571 mesh with each other; the transmission rack 59 is set on the water flow regulating slide arm 54 and meshes with the driven gear 575; it should be noted that the travel distances of the movable fork arm 52 and the water flow regulating slide arm 54 are not the same, and the synchronous pulley 1 572 and the synchronous pulley 2 574 are not set in equal proportion. The transmission ratio between the two is based on the requirement that the water flow regulating slide arm 54 can just complete its travel distance when the movable fork arm 52 completes its travel distance; it should also be noted that the transmission rod 6 is fixedly connected to the water flow regulating slide arm 54 in the flow regulating assembly. When the water flow regulating slide arm 54 in the spray mechanism 5 near the end of the spray cooling box 1 moves, it can drive the water flow regulating slide arm 54 in the other spray mechanisms 5 to move through the water flow regulating slide arm 54, which can greatly simplify the structure of the intermediate spray mechanism 5.

[0046] As a preferred embodiment, the flow regulating component includes an arc-shaped hollow plate 53, which is fixedly connected to the fork arm assembly; a water flow regulating slide arm 54, which is slidably mounted on the arc-shaped hollow plate 53; and evenly distributed nozzles 56 are provided on the arc-shaped hollow plate 53. When the fork arm assembly extends or retracts, the water flow regulating slide arm 54 can be driven to slide on the arc-shaped hollow plate 53 via a transmission component to adjust the number of nozzles 56 opening. Specifically, the arc-shaped hollow plate 53 is provided with a mounting seat that cooperates with the nozzles 56, and the contact surface between the arc-shaped hollow plate 53 and the water flow regulating slide arm 54 is a sealing surface 5. 12. In this state, the arc-shaped hollow plate 53 and the water flow regulating slide arm 54 seal the nozzle 56 through the contact of their sealing surfaces 512. The water flow regulating slide arm 54 is provided with an upper positioning block 510 and a lower positioning block 511 that cooperate with the arc-shaped hollow plate 53 to limit the stroke of the water flow regulating slide arm 54. A support roller 55 is movably installed at the end of the water flow regulating slide arm 54 away from the arc-shaped hollow plate 53. After the position of the water flow regulating slide arm 54 is adjusted according to the diameter of the pipe 7, the support roller 55 can be pressed against the pipe 7 to provide stable support when the pipe 7 is conveying water.

[0047] When the movable fork arm 52 is driven by the first-stage water inlet branch pipe 3 to retract inside the fixed fork arm 51, the drive gear 571 is driven by the drive rack 58 to drive the synchronous wheel 572 to rotate, and through the synchronous belt 573, it drives the synchronous wheel 574 and the driven gear 575 to rotate, and then through the transmission rack 59, it drives the water volume adjustment slide arm 54 to slide on the arc-shaped hollow plate 53 to adjust the number of nozzles 56 opening;

[0048] It should be noted that pipes 7 with different diameters require different cooling intensities. Larger diameter pipes 7 require more cooling surface area and cooling water volume. If the cooling intensity is insufficient, the temperature cannot drop in time, resulting in insufficient rigidity of the pipe 7 and subsequent tensile deformation. For smaller diameter pipes 7, if high-intensity cooling is used, the rigidity of the pipe 7 will be insufficient, leading to increased stress on the surface of the pipe 7 and deformation. By linking the flow regulation component with the fork arm component, the larger the diameter of the pipe 7, the greater the amount of contraction of the movable fork arm 52 into the fixed fork arm 51, and the more nozzles 56 open. That is, the larger the diameter of the pipe 7, the stronger the cooling intensity of the spray mechanism 5 on the pipe 7. It should also be noted that the spray mechanism 5 supplies cooling water through a variable frequency water pump. As the number of nozzles 56 open varies, the pipe network pressure changes. The variable frequency water pump can adaptively adjust the pipe network pressure to meet the water pressure requirements of different numbers of nozzles 56.

[0049] As a preferred technical solution in this embodiment, the primary water inlet branch pipe 3 is connected to the arc-shaped hollow plate 53 and is used to supply cooling water to the nozzle 56. Specifically, the spraying mechanism 5 also includes a secondary water inlet branch pipe 513. One end of the secondary water inlet branch pipe 513 is fixedly connected to the arc-shaped hollow plate 53, and the other end is fixedly connected to the primary water inlet branch pipe 3. The primary water inlet branch pipe 3 can transport cooling water along the secondary water inlet branch pipe 513 to the arc-shaped hollow plate 53, and then supply cooling water to the nozzle 56.

[0050] In another embodiment of the present invention, a squeezing slider 514 is provided at one end of the water volume regulating slide arm 54 near the arc-shaped hollow plate 53, and a lower sealing baffle 515 is provided at one end of the arc-shaped hollow plate 53 near the water volume regulating slide arm 54. A squeezing cavity can be formed between the squeezing slider 514 and the lower sealing baffle 515. Specifically, a squeezing cavity can be formed between the squeezing slider 514, the lower sealing baffle 515, the arc-shaped hollow plate 53, and the water volume regulating slide arm 54. The two sides of the water volume regulating slide arm 54 are in contact with the arc-shaped hollow plate 53 for sealing. The width of the squeezing slider 514 is L, and L is greater than the diameter of the mounting seat on the arc-shaped hollow plate 53, ensuring that the squeezing slider 514 can alternately contact the upper and lower edges of the mounting seat when sliding, thereby achieving effective sealing of the squeezing cavity and allowing the cooling water in the squeezing cavity to be squeezed into the interior of the movable fork arm 52 through the nozzle 56.

[0051] As a preferred technical solution in this embodiment, the row of nozzles 56 near the end of the arc-shaped hollow plate 53 away from the water flow regulating slide arm 54 is normally open. The squeezing chamber can cover the other nozzles 56 except for the normally open nozzles 56. When the water flow regulating slide arm 54 slides on the arc-shaped hollow plate 53, it can squeeze the cooling water in the squeezing chamber through the nozzles 56 covered by the squeezing chamber into the arc-shaped hollow plate 53. It should be noted that there will inevitably be fine impurities in the cooling water. With the increase of usage time, fine impurities will be deposited inside the nozzles 56, causing the nozzles 56 to be blocked, and the nozzles 56 need to be cleaned frequently. In this embodiment, a squeezing chamber is formed between the water flow regulating slide arm 54 and the arc-shaped hollow plate 53. When the water flow regulating slide arm 54 slides on the arc-shaped hollow plate 53, it can squeeze the cooling water in the squeezing chamber through the nozzles 56 at the squeezing chamber position into the arc-shaped hollow plate 53, backflushing the impurities deposited inside the nozzles 56 at the squeezing chamber position, which can greatly extend the cleaning cycle of the nozzles 56 at the squeezing chamber position.

[0052] In another embodiment of the present invention, the center distance adjustment mechanism 4 includes a connecting slider 41, which is fixedly mounted on the outside of the primary water inlet branch pipe 3; a positioning slide 42, which is used to restrict the position of the connecting slider 41; and an electric telescopic rod 43, which is used to drive the connecting slider 41 and the primary water inlet branch pipe 3 to move. Specifically, the electric telescopic rod 43 and the positioning slide 42 are both fixedly installed on the inner wall of the spray cooling box 1. A connecting bracket 44 is fixedly connected to the output shaft of the electric telescopic rod 43, and the connecting bracket 44 is fixedly connected to the connecting slider 41. By driving the connecting bracket 44 and the connecting slider 41 to move through the electric telescopic rod 43, the primary water inlet branch pipe 3 can be moved, thereby realizing the adjustment of the position of the spray mechanism 5.

[0053] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A cooling device for processing plastic pipes, comprising a spray cooling tank (1), a primary water inlet branch pipe (3), and a pipe (7) that is driven to move inside the spray cooling tank (1), characterized in that, Also includes: The spray mechanism (5) is installed on the first-level water inlet branch pipe (3) to support the pipe (7) and spray the pipe (7) for cooling. The center distance adjustment mechanism (4) is located at the end of the primary water inlet branch pipe (3) and is used to adjust the position of the primary water inlet branch pipe (3) and the spraying mechanism (5); The primary water inlet branch pipe (3) is driven by the center distance adjustment mechanism (4) to move the spray mechanism (5), which can make the spray mechanism (5) abut against the outside of pipes (7) of different diameters, and keep the distance between the spray mechanism (5) and the outer surface of pipes (7) of different diameters constant; the spray mechanism (5) includes a flow adjustment component, and the opening degree of the flow adjustment component increases with the increase of the diameter of the pipe (7); The spraying mechanism (5) includes a fork arm assembly that is driven by the primary water inlet branch pipe (3) to retract; a flow regulating assembly that can abut against the outside of the pipe (7) and adaptively adjust the opening degree according to the diameter of the pipe (7); and a transmission assembly for drivingly connecting the fork arm assembly and the flow regulating assembly. The flow regulation component includes an arc-shaped hollow plate (53), which is fixedly connected to the fork arm assembly; a water volume regulating slide arm (54), which is slidably installed on the arc-shaped hollow plate (53); the arc-shaped hollow plate (53) is provided with evenly distributed nozzles (56); when the fork arm assembly extends and retracts, the water volume regulating slide arm (54) can be driven to slide on the arc-shaped hollow plate (53) through the transmission component to adjust the number of nozzles (56) opening; The water volume regulating slide arm (54) is provided with a squeezing slider (514) at one end near the arc-shaped hollow plate (53), and a lower sealing baffle (515) is provided at one end of the arc-shaped hollow plate (53) near the water volume regulating slide arm (54). A squeezing cavity can be formed between the squeezing slider (514) and the lower sealing baffle (515).

2. The cooling device for processing plastic pipes according to claim 1, characterized in that, One end of the spray cooling box (1) is surrounded by a main water inlet ring pipe (2), which is connected to the first-level water inlet branch pipe (3) and is used to supply cooling water to the first-level water inlet branch pipe (3) and the spray mechanism (5).

3. The cooling device for processing plastic pipes according to claim 1, characterized in that, The spraying mechanism (5) forms a spraying module in a ring array along the axis of the spraying cooling box (1), and the spraying module forms a spraying module in a linear array along the axis of the spraying cooling box (1). The spraying mechanisms (5) in adjacent spraying modules are staggered.

4. A cooling device for processing plastic pipes according to claim 1, characterized in that, Except for the spray mechanism (5) near the end of the spray cooling box (1), no transmission components are provided on the other spray mechanisms (5), and a transmission rod (6) is provided on the flow regulating component in the adjacent spray mechanism (5).

5. A cooling device for processing plastic pipes according to claim 1, characterized in that, The primary water inlet branch pipe (3) is connected to the arc-shaped hollow plate (53) and is used to supply cooling water to the nozzle (56).

6. A cooling device for processing plastic pipes according to claim 1, characterized in that, A row of nozzles (56) near the end of the arc-shaped hollow plate (53) away from the water volume regulating slide arm (54) is normally open. The extrusion chamber can cover the other nozzles (56) except for the normally open nozzles (56). When the water volume regulating slide arm (54) slides on the arc-shaped hollow plate (53), it can squeeze the cooling water in the extrusion chamber into the arc-shaped hollow plate (53) through the nozzles (56) covered by the extrusion chamber.

7. A cooling device for processing plastic pipes according to claim 1, characterized in that, The center distance adjustment mechanism (4) includes a connecting slider (41), which is fixedly mounted on the outside of the primary water inlet branch pipe (3); a positioning slide (42), which is used to restrict the position of the connecting slider (41); and an electric telescopic rod (43), which is used to drive the connecting slider (41) and the primary water inlet branch pipe (3) to move.

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