A kind of plastic extruder screw cooling water pipe dredging device

Abstract

The application relates to a dredging device for a plastic extruder screw cylinder cooling water pipe and relates to the technical field of cooling water pipe technology, which comprises a screw cylinder, a dredging water recycling mechanism comprises a plurality of flow guide pipes, the bottom of the plurality of flow guide pipes is externally fixedly connected with a three-way switching shell, the inside of the three-way switching shell is rotationally connected with a switching control handrail, the inside of the three-way switching shell is rotationally connected with a three-way switching ball, the inside of the three-way switching shell is fixedly connected with a switching branch pipe, and the other end of the switching branch pipe is fixedly connected with a water resource recycling main pipe. The application has the effects that the switching control handrail fixed in the inside of the three-way switching shell is rotated, the three-way switching ball is driven to rotate by the switching control handrail, the flow direction of water flow in the cooling water pipe is changed in the rotating process of the three-way switching ball, and the filtered water flow is filtered by a filtering assembly connected with the water resource recycling main pipe.

Description

Technical Field

[0001] This utility model relates to the field of cooling water pipe technology, and in particular to a device for unblocking cooling water pipes of plastic extruder barrels. Background Technology

[0002] The screw barrel generates high temperatures during operation, requiring effective heat dissipation through cooling water pipes to prevent overheating from affecting plastic quality and production efficiency. The flowing water in these pipes serves to lower the temperature. However, over time, dirt and deposits can accumulate in the pipes, causing blockages and affecting water flow and cooling effectiveness. Therefore, using a cleaning device to regularly remove these deposits ensures smooth water flow and stable cooling. Using such a device extends the lifespan of the cooling system, prevents equipment malfunctions caused by uneven cooling, improves production efficiency, and reduces maintenance costs.

[0003] A search revealed Chinese Patent Publication No. CN101767431A, which discloses "a device for unblocking cooling water pipes of a plastic extruder barrel, comprising a barrel assembly consisting of multiple barrel segments (1), each barrel segment (1) having a cooling channel (2), each cooling channel (2) having an inlet branch pipe (3) and an outlet branch pipe (5), each inlet branch pipe (3) being connected to a main inlet pipe (4), each outlet branch pipe (5) being connected to a main outlet pipe (6), and the main outlet pipe (6) being connected to an acid-resistant..." The inlet of the coolant container (14) and the outlet of the coolant container (14) are connected to a motorized pressure pump (9) via a pipeline (7). The drain of the motorized pressure pump (9) is connected to the main water inlet pipe (4). This technical solution can provide motorized pump pressure cooling water that meets the dredging requirements, can dredge the cooling water flow channel of the entire screw assembly over a large area, and can dredge strictly according to the required resistance, that is, the timing of pressure. It has a high degree of mechanization and automation and is a highly efficient device for dredging cooling water flow channels.

[0004] The aforementioned patent specification mentions "a device for unblocking cooling water pipes of a plastic extruder screw barrel, comprising a screw barrel assembly consisting of multiple screw barrel segments (1), each screw barrel segment (1) having a cooling channel (2), each cooling channel segment (2) having an inlet branch pipe (3) and an outlet branch pipe (5), each inlet branch pipe (3) being connected to an inlet main pipe (4), each outlet branch pipe (5) being connected to an outlet main pipe (6), the outlet main pipe (6) being connected to the inlet of a coolant container (14) resistant to acidic solution, the outlet of the coolant container (14) being connected to a motorized pressure pump (9) via a pipe (7), and the drain port of the motorized pressure pump (9) being connected to the inlet main pipe (4)". Because this structure uses cooling water for unblocking, the unblocked debris accumulates in the filter assembly as the device is used. Furthermore, the lack of a structure that facilitates cleaning of the filter assembly negatively impacts the operation of the plastic extruder. Utility Model Content

[0005] The purpose of this application is to provide a dredging device for the cooling water pipe of a plastic extruder barrel, which aims to improve the problem in the prior art where, when some devices use cooling water for dredging, debris easily accumulates in the filter components and there is a lack of a structure that facilitates cleaning the filter components, resulting in a decrease in filtration efficiency and affecting the normal use of the equipment.

[0006] The present application provides a device for unblocking cooling water pipes of a plastic extruder screw, which adopts the following technical solution: A device for unblocking cooling water pipes of a plastic extruder screw includes a screw, an anti-slip block is fixedly connected to the bottom of the screw, a support frame is fixedly connected to the bottom of the anti-slip block, a plurality of cooling water pipes are fixedly connected inside the screw, an isolation unblocking mechanism is fixedly connected to one end of the cooling water pipe, the isolation unblocking mechanism divides the cooling water pipe into two sections, and an unblocking water recovery mechanism is fixedly connected to the other end of the cooling water pipe;

[0007] The dredging water recovery mechanism includes multiple guide pipes, the outer surfaces of which are fixedly connected to the inside of the screw cylinder. A three-way switching housing is fixedly connected to the bottom of each guide pipe, dividing the guide pipes into two sections. A switching control handle is rotatably connected inside each three-way switching housing, and a three-way switching ball is rotatably connected inside the housing. A switching branch pipe is fixedly connected inside the housing, and the other end of the branch pipe is fixedly connected to a main water recovery pipe. A filter assembly is fixedly connected to the left side of the main water recovery pipe.

[0008] Through the above technical solution, the plastic extruder barrel cooling water pipe unblocking device has significant advantages: the isolated unblocking mechanism can unblock the cooling water pipe in sections, improving unblocking efficiency; the unblocking water recovery mechanism realizes water flow switching through a three-way switching structure, and the filter component can recycle water resources. The overall device is highly efficient, water-saving, and easy to operate.

[0009] As a further description of the above technical solution: the isolated unblocking mechanism includes a sliding connecting shaft, the sliding connecting shaft is internally slidably connected to the outside of the cooling water pipe, a return spring is fixedly connected internally to the sliding connecting shaft, a threaded connecting shaft is internally threaded to the sliding connecting shaft, and the thread on the outside of the threaded connecting shaft is a bidirectional thread.

[0010] Through the above solution: In the isolation-type unblocking mechanism, the sliding connecting shaft can slide along the cooling water pipe, and with the help of the return spring, it can achieve elastic connection and position reset, which is convenient for flexible docking of pipes; The bidirectional thread design of the threaded connecting shaft can simultaneously drive the two end components to open or tighten synchronously, so as to realize the rapid isolation and segmentation of the cooling water pipe. The structure is compact and easy to operate, improving the controllability and efficiency of unblocking operations.

[0011] As a further description of the above technical solution: the filter assembly includes a filter box, the right side of which is fixedly connected to the left side of the water recovery main pipe, a filter plate mounting block is slidably connected inside the filter box, a first filter plate is slidably connected inside the filter plate mounting block, a second filter plate is slidably connected inside the filter plate mounting block, and a third filter plate is slidably connected inside the filter plate mounting block.

[0012] The above solution achieves high-efficiency filtration through a multi-layer structure: the filter box is connected to the switching branch pipe for easy collection and drainage of wastewater; the filter plate mounting block allows for the sliding installation of the first, second, and third filter plates, forming a multi-stage filtration system that progressively intercepts impurities from large particles to fine impurities, improving filtration accuracy; the detachable sliding design facilitates regular cleaning and replacement of filter media, ensuring continuous and stable filtration performance, and reducing maintenance costs while achieving water resource recycling.

[0013] As a further description of the above technical solution: the bottom of the support frame is fixedly connected to a main water inlet pipe, the bottom of the support frame is fixedly connected to a main water outlet pipe, the exterior of a plurality of cooling water pipes is fixedly connected to the interior of the main water inlet pipe, the exterior of a plurality of guide pipes is fixedly connected to the interior of the main water outlet pipe, one end of the main water outlet pipe and the main water inlet pipe are both designed with a sealing seal, the other end of the main water inlet pipe and the main water outlet pipe are fixedly connected to a water storage tank, and a storage box is slidably connected inside the water storage tank.

[0014] The above solution connects the inlet and outlet water pipes at the bottom of the support frame to the cooling water pipe and the guide pipe, respectively, forming a closed water circulation system. The sealed design prevents water leakage. Water storage tanks are connected at both ends to realize water resource recycling. The internal sliding storage box facilitates the collection of filtered impurities, making regular cleaning and maintenance convenient. The entire system has a compact structure, ensuring cooling efficiency while reducing energy consumption through water circulation, thus improving the practicality and environmental friendliness of the equipment.

[0015] As a further description of the above technical solution: the filter plate mounting block has sliding grooves of different lengths inside, and the first filter plate, the second filter plate and the third filter plate are provided with guide blocks on the upper and lower sides, and the guide blocks are slidably connected to the inside of the sliding grooves.

[0016] The above solution utilizes sliding grooves of varying lengths within the filter plate mounting block, along with guide blocks on the upper and lower sides of the first, second, and third filter plates, to achieve differentiated installation and positioning of multi-layer filter plates. The guide blocks slide precisely along the sliding grooves, ensuring stable and layered installation of the filter plates. The varying lengths facilitate differentiation of filtration precision, guaranteeing the orderly operation of multi-stage filtration while simplifying installation and maintenance through a standardized sliding structure, thus enhancing the practicality and reliability of the filter assembly.

[0017] As a further description of the above technical solution: both the three-way switching shell and the three-way switching ball have three-way through holes inside, and the three-way through holes inside the three-way switching shell and the three-way switching ball are opposite to each other.

[0018] The above solution utilizes a three-way switching shell and a three-way switching ball, both equipped with three-way through holes positioned opposite each other. Rotating the switching ball allows for precise changes in water flow direction: when the through holes are aligned, the corresponding pipe is opened; when misaligned, water flow is blocked, enabling switching of water flow paths during cooling water pipe unblocking (e.g., normal cooling, single-pipe unblocking, wastewater recovery, etc.). The structure is compact and flexible, allowing for pipe on / off control without complex operations, improving the convenience of unblocking operations and the stability of system operation.

[0019] As a further description of the above technical solution: the sliding connecting shaft has an adjustment groove inside, the cooling water pipe has an adjustment block outside, the adjustment block is slidably connected to the inside of the adjustment groove, and the return spring is fixedly connected to the inside of the adjustment groove.

[0020] The above solution involves a sliding groove inside the sliding connecting shaft that engages with an adjusting block outside the cooling water pipe. This limits the sliding stroke of the connecting shaft, preventing excessive displacement that could lead to seal failure. A return spring, fixed within the adjusting groove, automatically resets the connecting shaft to its initial position after external force pushes it to slide, ensuring the stability and sealing of the isolated unblocking mechanism. This structure, through a dual design of mechanical limiting and elastic reset, enhances the reliability and ease of operation during segmented unblocking of the cooling water pipe.

[0021] As a further description of the above technical solution: the first filter plate has a cross-shaped filter hole inside, the second filter plate has a large circular filter hole inside, and the third filter plate has a small circular filter hole inside.

[0022] The above solution utilizes a differentiated pore size design to achieve multi-stage precision filtration: the cross-shaped pores of the first filter plate intercept larger particles; the large circular pores of the second filter plate filter medium-sized particles; and the small circular pores of the third filter plate trap fine impurities, forming a three-layer filtration system from coarse to fine. This gradient filtration structure efficiently separates and clears different impurities in wastewater, improving water resource recycling rates. Simultaneously, the standardized pore size design facilitates targeted selection and replacement of filter media, reducing maintenance costs and ensuring the long-term stable operation of the circulation system.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. In this utility model, by rotating the switching control handle fixed inside the three-way switching housing, the three-way switching ball is driven to rotate. During the rotation, the three-way switching ball changes the flow direction of the water entering the cooling water pipe, so that the water flowing to clear the cooling water pipe is guided into the water recovery main pipe through the switching branch pipe. Then, the water flowing to clear the pipe is filtered by the filter assembly connected to the water recovery main pipe, so as to facilitate subsequent recycling and ultimately save water resources during the clearing process.

[0025] 2. In this utility model, when unblocking multiple cooling water pipes inside the screw barrel, the sliding connecting shaft outside the blocked cooling water pipe is rotated. Then, the sliding connecting shaft is reset under the push of the return spring fixed inside the sliding connecting shaft. At the same time, the sliding connecting shaft is also loosened from the threaded connection with the threaded connecting shaft. Then, the threaded connecting shaft is rotated to disassemble the threaded connecting shaft. Then, by blocking the inside of the cooling water pipe connected to the main water inlet pipe, the obstruction of the blocked cooling water pipe to the entire cooling system is isolated, thereby improving the working efficiency of the plastic extruder. Afterwards, the blocked cooling water pipe is flushed by an external high-pressure water flow unblocking mechanism, thereby quickly unblocking the blocked cooling water pipe. Overall, the above structure changes the original whole unblocking method to segmented unblocking, thereby shortening the overall unblocking time and improving the working efficiency of the device. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of a device for unblocking the cooling water pipe of a plastic extruder barrel according to the present invention.

[0027] Figure 2 This is a schematic diagram of the filter plate mounting block of a dredging device for a plastic extruder barrel cooling water pipe proposed in this utility model;

[0028] Figure 3 This is a schematic diagram of the main outlet pipe of a device for unblocking cooling water pipes of a plastic extruder barrel according to the present invention.

[0029] Figure 4 This is a schematic diagram of the three-way switching housing of a dredging device for a plastic extruder barrel cooling water pipe proposed in this utility model;

[0030] Figure 5 This is a schematic diagram of the structure of a storage box for a device for unblocking cooling water pipes of a plastic extruder barrel, as proposed in this utility model.

[0031] Figure 6 for Figure 5 Enlarged view of point A in the middle;

[0032] Explanation of reference numerals in the attached drawings: 1. Screw barrel; 2. Anti-slip block; 3. Support frame; 4. Cooling water pipe; 5. Isolation-type unblocking mechanism; 51. Sliding connecting shaft; 52. Return spring; 53. Threaded connecting shaft; 6. Unblocking water recovery mechanism; 61. Guide pipe; 62. Three-way switching housing; 63. Three-way switching ball; 64. Switching control handle; 65. Water recovery main pipe; 66. Switching branch pipe; 7. Filter assembly; 71. Filter box; 72. Filter plate mounting block; 73. First filter plate; 74. Second filter plate; 75. Third filter plate; 8. Inlet main pipe; 9. Outlet main pipe; 10. Water storage tank; 11. Storage box. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1 - Appendix Figure 6 This application will be described in further detail below.

[0034] Example: A device for unblocking the cooling water pipe of a plastic extruder barrel, referring to... Figures 1 to 4 The extruder includes a screw barrel 1, which is one of the core components of the plastic extruder and is mainly used to push and heat the plastic raw material. A blocker 2 is fixedly connected to the bottom of the screw barrel 1. The blocker 2 prevents the screw barrel 1 from shifting or vibrating during installation or operation. A support frame 3 is fixedly connected to the bottom of the blocker 2, providing structural support and ensuring the correct installation and stable position of the screw barrel 1. Multiple cooling water pipes 4 are fixedly connected inside the screw barrel 1. The cooling water pipes 4 are a key component of the entire cooling system, responsible for channeling cooling water through the screw barrel. 1. Around the screw barrel 1, heat is carried away to prevent overheating. One end of the cooling water pipe 4 is fixedly connected to an isolation-type unblocking mechanism 5. The function of the isolation-type unblocking mechanism 5 is to perform segmented unblocking operation on the cooling water pipe 4. By dividing the cooling water pipe 4 into two sections, it is easy to isolate the influence on other cooling water pipes 4 when unblocking the cooling water pipe 4. The isolation-type unblocking mechanism 5 divides the cooling water pipe 4 into two sections. The other end of the cooling water pipe 4 is fixedly connected to an unblocking water recovery mechanism 6. The unblocking water recovery mechanism 6 is responsible for guiding and recovering the water flow during the unblocking process.

[0035] Specifically, when it is necessary to unclog the cooling water pipe of the plastic extruder barrel, the cooling water pipe 4 is first divided into two sections using the isolation unblocking mechanism 5 to block the water flow. Next, by operating the three-way switching handle in the unblocking water recovery mechanism 6 to rotate the three-way switching ball 63, the connection path between the guide pipe 61, the switching branch pipe 66, and the water recovery main pipe 65 is switched. This allows the unblocking water to flow through the guide pipe 61 and the three-way switching housing 62 into the switching branch pipe 66 and the water recovery main pipe 65, and then into the filter assembly 7 for filtration. Finally, the filtered water flows into the water storage tank 10, thus achieving the unblocking of the cooling water pipe 4 and the recovery of the unblocking water.

[0036] The dredging water recovery mechanism 6 includes multiple guide pipes 61, which are externally fixedly connected to the inside of the screw cylinder 1. A three-way switching housing 62 is fixedly connected to the bottom of each guide pipe 61, dividing the guide pipes 61 into two sections. A switching control handle 64 is rotatably connected inside the three-way switching housing 62, and a three-way switching ball 63 is rotatably connected inside the three-way switching housing 62. The combination of the guide pipes 61 and the three-way switching housing 62 allows for changes in the water flow path, and the water flow direction is controlled by the three-way switching ball 63. The system includes water recycling and filtration. A switching branch pipe 66 is fixedly connected inside the three-way switching housing 62. The other end of the switching branch pipe 66 is fixedly connected to the water recycling main pipe 65. The connection between the switching branch pipe 66 and the water recycling main pipe 65 ensures that the dredging water can be effectively filtered before recycling to avoid secondary pollution. A filter assembly 7 is fixedly connected to the left side of the water recycling main pipe 65. Three-way through holes are opened inside both the three-way switching housing 62 and the three-way switching ball 63. The three-way through holes opened inside the three-way switching housing 62 and the three-way switching ball 63 are opposite to each other.

[0037] Specifically, when unblocking the cooling water pipe 4, rotating the switching control handle 64 causes the three-way switching ball 63 to rotate inside the three-way switching housing 62. By adjusting the relative position of the three-way switching ball 63 and the three-way through hole inside the three-way switching housing 62, the water flow path of the guide pipe 61 is changed, so that the unblocking water in the cooling water pipe 4 flows through the guide pipe 61 and the three-way switching housing 62 into the switching branch pipe 66 and the water recovery main pipe 65, and finally is transported to the filter assembly 7 for filtration treatment, completing the unblocking water recovery process.

[0038] The filter assembly 7 includes a filter box 71. The right side of the filter box 71 is fixedly connected to the left side of the water recovery main pipe 65. A filter plate mounting block 72 is slidably connected inside the filter box 71. A first filter plate 73 is slidably connected inside the filter plate mounting block 72. A second filter plate 74 is slidably connected inside the filter plate mounting block 72. A third filter plate 75 is slidably connected inside the filter plate mounting block 72. The first filter plate 73 is mainly used to intercept larger impurities. The second filter plate 74 is used to filter medium-sized particles. The third filter plate 75 is used for fine filtration to ensure that the water quality meets the recovery standards. The filter plate mounting block 72 has sliding grooves of different lengths inside. Guide blocks are provided on the upper and lower sides of the second filter plate 74 and the third filter plate 75. The outside of the guide blocks is slidably connected to the inside of the sliding grooves. The first filter plate 73 has cross-shaped filter holes inside. The second filter plate 74 has large circular filter holes inside. The third filter plate 75 has small circular filter holes inside.

[0039] Specifically, when the dredging water flows into the filter box 71 through the water recovery main pipe 65, it first passes through the cross-shaped filter holes of the first filter plate 73 to intercept larger particles, then passes through the large circular holes of the second filter plate 74 to filter medium-sized particles, and finally through the small circular holes of the third filter plate 75 to intercept fine impurities. The three filter plates are precisely positioned along sliding grooves of different lengths within the filter plate mounting block 72 by guide blocks on both the upper and lower sides, forming a gradient filtration system. The filtered water flows to the subsequent treatment unit. When the filter plates need to be cleaned, the filter plate mounting block 72 can be slid out for maintenance.

[0040] Reference Figure 3 , Figure 5 , Figure 6 The isolation-type unblocking mechanism 5 includes a sliding connecting shaft 51. As an important component of the isolation-type unblocking mechanism 5, the sliding connecting shaft 51 mainly functions to adjust the segmentation of the cooling water pipe 4. The inside of the sliding connecting shaft 51 is slidably connected to the outside of the cooling water pipe 4. A return spring 52 is fixedly connected inside the sliding connecting shaft 51. The return spring 52 ensures automatic reset after the unblocking operation, maintaining the integrity of the water pipe system. The inside of the sliding connecting shaft 51 is threadedly connected to a threaded connecting shaft 53. The thread on the outside of the threaded connecting shaft 53 is a bidirectional thread. An adjustment groove is provided inside the sliding connecting shaft 51. An adjustment block is provided outside the cooling water pipe 4. The outside of the adjustment block is slidably connected to the inside of the adjustment groove. The outside of the return spring 52 is fixedly connected to the inside of the adjustment groove.

[0041] Specifically, when it is necessary to unclog the cooling water pipe 4 in sections, the threaded connecting shaft 53 is rotated. Utilizing its bidirectional thread characteristic, the sliding connecting shaft 51 is driven to slide along the outside of the cooling water pipe 4. The adjusting block slides synchronously within the adjusting groove to limit the sliding range. After sliding to the correct position, the threaded connecting shaft 53 is released, and the return spring 52 pushes the sliding connecting shaft 51 to its original position, thus achieving the isolation and segmentation of the cooling water pipe 4 and preparing for subsequent unclog operations.

[0042] The bottom of the support frame 3 is fixedly connected to the inlet main pipe 8 and the bottom of the support frame 3 is fixedly connected to the outlet main pipe 9. The inlet main pipe 8 and the outlet main pipe 9 are respectively responsible for transporting cooling water to the cooling water pipe 4 and for the recycled water to flow out. The sealing design of the inlet main pipe 8 and the outlet main pipe 9 ensures the stability of the water flow and prevents leakage or pressure loss. The main inlet pipe 8 delivers water from the storage tank 10 to each cooling water pipe 4, ensuring a uniform water flow. The main outlet pipe 9 guides the water flowing through the cooling water pipes 4 back to the storage tank 10, completing a water circulation system. Multiple cooling water pipes 4 are externally fixedly connected to the inside of the main inlet pipe 8, and multiple guide pipes 61 are externally fixedly connected to the inside of the main outlet pipe 9. One end of both the main outlet pipe 9 and the main inlet pipe 8 is sealed. The other end of the main inlet pipe 8 and the main outlet pipe 9 is fixedly connected to the storage tank 10. The storage tank 10 serves as a storage device for the water circulation, responsible for collecting and storing the recycled cooling water. A storage box 11 is slidably connected inside the storage tank 10. The storage box 11 is used to store various debris needed for unblocking (such as unblocking water pipes and removing blockages in the cooling water pipes 4).

[0043] Specifically, during cooling operations, water in the water storage tank 10 flows into each cooling water pipe 4 through the inlet main pipe 8, cools the screw barrel 1, and then flows through the guide pipe 61 to collect at the outlet main pipe 9, finally returning to the water storage tank 10 to complete the circulation. When it is necessary to unclog the cooling water pipe 4, the isolation unblocking mechanism 5 operates in sections.

[0044] The implementation principle of this application embodiment is as follows:

[0045] The cooling water stored inside the water tank 10 circulates through the inlet manifold 8. The water flowing through the inlet manifold 8 is then guided by the cooling water pipe 4 to cool the plastic inside the screw barrel 1. Because the cooling water pipe 4 inside the screw barrel 1 adopts a multi-section design, when clearing the cooling water pipe 4, it is only necessary to locate the blocked cooling water pipe 4, and then rotate the sliding connecting shaft 51 outside the blocked cooling water pipe 4. The sliding connecting shaft 51 is then fixed inside the return spring. Under the push of 52, the reset is achieved, and at the same time, the sliding connecting shaft 51 is also loosened from the threaded connection with the threaded connecting shaft 53. Then, the threaded connecting shaft 53 is rotated to disassemble the threaded connecting shaft 53. Then, by blocking the inside of the cooling water pipe 4 connected to the water inlet main pipe 8, the obstruction of the blocked cooling water pipe 4 to the entire cooling system is isolated, thereby improving the working efficiency of the plastic extruder. Then, the blocked cooling water pipe 4 is flushed by the external high-pressure water flow unblocking mechanism, thereby quickly unblocking the blocked cooling water pipe 4.

[0046] The water flow that enters the cooling water pipe 4 to unclog the cooling water pipe 4 flows through the guide pipe 61 of the cooling water pipe 4. Under the constraint of the three-way switching ball 63, the guide pipe 61 switches between the main outlet pipe 9 and the switching branch pipe 66. During the unblocking process, by rotating the three-way switching shell 62 fixed inside the guide pipe 61, the three-way switching shell 62 drives the three-way switching ball 63, so that the destination of the water flow entering the guide pipe 61 is switched to the switching branch pipe 66. Under the guidance of the switching branch pipe 66, the water flow flows to the water recovery main pipe 65, and finally flows to the filter assembly 7 through the water recovery main pipe 65 for subsequent recycling.

[0047] During the filtration process of the filter assembly 7, the water first passes through the first filter plate 73 for coarse filtration, which isolates large debris. Then, it passes through the first filter plate 73 for fine filtration, and finally through the third filter plate 75 for fine filtration. Since the first filter plate 73, the second filter plate 74, and the third filter plate 75 are all slidably connected inside the filter plate mounting block 72, and the filter plate mounting block 72 is slidably connected inside the filter box 71, when the filter assembly 7 needs to be cleaned or replaced, it is only necessary to pull the filter plate mounting block 72. The filter plate mounting block 72 will then move the first filter plate 73, the second filter plate 74, and the third filter plate 75, ultimately causing the first filter plate 73, the second filter plate 74, and the third filter plate 75 to detach from the inside of the filter box 71, thereby achieving the purpose of quickly cleaning the filter assembly 7.

[0048] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be included within the scope of protection of this application.

Claims

1. A device for unblocking cooling water pipes of a plastic extruder screw barrel, comprising a screw barrel (1), characterized in that: The bottom of the screw barrel (1) is fixedly connected to an anti-slip block (2), the bottom of the anti-slip block (2) is fixedly connected to a support frame (3), the inside of the screw barrel (1) is fixedly connected to multiple cooling water pipes (4), one end of the cooling water pipe (4) is fixedly connected to an isolation-type unblocking mechanism (5), the isolation-type unblocking mechanism (5) divides the cooling water pipe (4) into two sections, and the other end of the cooling water pipe (4) is fixedly connected to an unblocking water recovery mechanism (6). The dredging water recovery mechanism (6) includes multiple guide pipes (61), the external of the multiple guide pipes (61) is fixedly connected to the inside of the screw barrel (1), the bottom of the multiple guide pipes (61) is fixedly connected to a three-way switching shell (62), the multiple three-way switching shells (62) divide the multiple guide pipes (61) into two sections, the internal of the three-way switching shells (62) is rotatably connected to a switching control handle (64), the internal of the three-way switching shells (62) is rotatably connected to a three-way switching ball (63), the internal of the three-way switching shells (62) is fixedly connected to a switching branch pipe (66), the other end of the switching branch pipe (66) is fixedly connected to a water recovery main pipe (65), and the left side of the water recovery main pipe (65) is fixedly connected to a filter assembly (7).

2. The unblocking device for the cooling water pipe of a plastic extruder barrel according to claim 1, characterized in that: The isolation-type unblocking mechanism (5) includes a sliding connecting shaft (51), which is internally slidably connected to the outside of the cooling water pipe (4). A return spring (52) is fixedly connected inside the sliding connecting shaft (51). A threaded connecting shaft (53) is internally threaded to the sliding connecting shaft (51), and the thread on the outside of the threaded connecting shaft (53) is a bidirectional thread.

3. The unblocking device for the cooling water pipe of a plastic extruder barrel according to claim 1, characterized in that: The filter assembly (7) includes a filter box (71), the right side of which is fixedly connected to the left side of the water recovery main pipe (65). A filter plate mounting block (72) is slidably connected inside the filter box (71). A first filter plate (73) is slidably connected inside the filter plate mounting block (72). A second filter plate (74) is slidably connected inside the filter plate mounting block (72). A third filter plate (75) is slidably connected inside the filter plate mounting block (72).

4. The unblocking device for the cooling water pipe of a plastic extruder barrel according to claim 1, characterized in that: The bottom of the support frame (3) is fixedly connected to the water inlet main pipe (8), and the bottom of the support frame (3) is fixedly connected to the water outlet main pipe (9). The exterior of multiple cooling water pipes (4) is fixedly connected to the interior of the water inlet main pipe (8), and the exterior of multiple guide pipes (61) is fixedly connected to the interior of the water outlet main pipe (9). One end of the water outlet main pipe (9) and the water inlet main pipe (8) are both sealed. The other end of the water inlet main pipe (8) and the water outlet main pipe (9) is fixedly connected to the water storage tank (10). The interior of the water storage tank (10) is slidably connected to the storage box (11).

5. The unblocking device for the cooling water pipe of a plastic extruder barrel according to claim 3, characterized in that: The filter plate mounting block (72) has sliding grooves of different lengths inside. The first filter plate (73), the second filter plate (74) and the third filter plate (75) are provided with guide blocks on the upper and lower sides. The guide blocks are slidably connected to the inside of the sliding groove.

6. The unblocking device for the cooling water pipe of a plastic extruder barrel according to claim 1, characterized in that: The interior of both the three-way switching housing (62) and the three-way switching ball (63) is provided with three-way through holes, and the three-way through holes inside the three-way switching housing (62) and the three-way switching ball (63) are opposite to each other.

7. The unblocking device for the cooling water pipe of a plastic extruder barrel according to claim 2, characterized in that: The sliding connecting shaft (51) has an adjustment groove inside, the cooling water pipe (4) has an adjustment block outside, the adjustment block is slidably connected to the inside of the adjustment groove, and the return spring (52) is fixedly connected to the inside of the adjustment groove.

8. The unblocking device for the cooling water pipe of a plastic extruder barrel according to claim 3, characterized in that: The first filter plate (73) has a cross-shaped filter hole inside, the second filter plate (74) has a large circular filter hole inside, and the third filter plate (75) has a small circular filter hole inside.

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