Closed cooling equipment for polyvinyl chloride sheath material production

Abstract

The utility model discloses a kind of closed cooling equipment for polyvinyl chloride sheath material production, it is related to cooling equipment technical field, including: cooling water tank, air drying box and atomizing spray head, grading plate, branch pipe and silver heat conduction plate, the inner wall of grading plate is equipped with water diversion groove, branch pipe, pipeline and the inner wall of water diversion groove are equipped with solenoid valve, the inner wall of cooling water tank is equipped with water diversion inclined plate, the outer wall of grading plate is equipped with electric heating wire, the outer wall of grading plate is equipped with silver heat conduction plate.The utility model is equipped with grading mechanism by installation, by water tank, water is made into the two sides of grading plate, solenoid valve in water diversion groove is closed, so that two sides water is segmented, silver heat conduction plate is heated to one side water, when cooling polyoxyethylene sheath, first cooling is carried out using low-temperature cooling water, then slow cooling is carried out using water after heating, and is shaped, avoid the situation that material damage is caused by internal stress.

Description

Technical Field

[0001] This utility model relates to the field of cooling equipment technology, specifically a closed cooling equipment for the production of polyvinyl chloride sheathing materials. Background Technology

[0002] Closed-loop cooling equipment in polyvinyl chloride (PVC) sheathing material production is a device specifically designed for the rapid cooling and solidification of PVC granules after molding. It is a crucial component of the PVC sheathing material granulation production line, used to rapidly cool and solidify the extruded, high-temperature molten PVC strips through a sealed system, ensuring stable granule shape and meeting physical property standards. Its design must balance cooling efficiency with environmental requirements, typically employing water cooling and air cooling methods. It is widely used in PVC sheathing material granulation production lines, wire and cable sheathing material production, and other industries.

[0003] Patent document CN219114557U discloses a cooling device for producing cable sheathing materials. It describes a device comprising a water tank, a protective frame fixedly connected to one side of the water tank, a reciprocating screw rotatably connected to the inner side of the protective frame, a cooling assembly and a drying assembly mounted on the reciprocating screw, the cooling assembly including a sliding block adapted to the reciprocating screw, and a base fixedly connected to one side of the sliding block, a cooling motor mounted on the base, and multiple cooling blades on the output shaft of the cooling motor, with an atomizing nozzle fixedly connected to the support of the base. This invention, by installing a protective frame on one side of the water tank and a reciprocating screw-type transmission mechanism on the protective frame, enables the cooling and drying assemblies to move cyclically, thereby increasing the cooling area and improving cooling efficiency, solving the problems of small cooling area and lack of drying function in current devices.

[0004] However, the aforementioned publicly available literature on cable sheath material production cooling equipment mainly addresses the current issues of small cooling area and lack of drying function, making it inconvenient to change the single water tank inside the cooling water tank to a double water tank.

[0005] In view of this, it is necessary to develop a grading mechanism to avoid damage to the PVC sheath material caused by internal stress due to temperature differences during recooling. Summary of the Invention

[0006] The purpose of this utility model is to provide a closed-loop cooling device for the production of polyvinyl chloride sheathing materials, so as to solve the technical problem mentioned in the background art of enabling the closed-loop cooling device for the production of polyvinyl chloride sheathing materials to have a grading function.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a closed cooling device for the production of polyvinyl chloride sheathing material, comprising: a cooling water tank, a drying box and an atomizing nozzle, wherein the inner wall of the cooling water tank is provided with a grading mechanism, the grading mechanism being used to change the single water tank inside the cooling water tank into a double water tank;

[0008] The grading mechanism includes a grading plate, branch pipes, and a silver heat-conducting plate. The grading plate is located on the inner wall of the cooling water tank. A water inlet groove is provided on the inner wall of the grading plate. A branch pipe is installed on the outer wall of the pipe, and the branch pipe and the pipe are internally connected. Solenoid valves are installed on the inner walls of the branch pipe, the pipe, and the water inlet groove. A water inlet inclined plate is installed on the inner wall of the cooling water tank. An observation groove is provided on the inner wall of the cooling water tank. A transparent glass is installed on the inner wall of the observation groove. An electric heating wire is installed on the outer wall of the grading plate. A silver heat-conducting plate is installed on the outer wall of the grading plate, and the silver heat-conducting plate is located on top of the electric heating wire.

[0009] Preferably, an mounting plate is installed on the outer wall of the cooling water tank, a water inlet trough is provided on the top of the cooling water tank, a drive bracket is installed on the outer wall of the cooling water tank, a drive motor is installed on the outer wall of the drive bracket, a bidirectional threaded screw is installed at the output end of the drive motor, two sets of threaded sleeves are installed around the outer wall of the bidirectional threaded screw, a limit rod is installed on the inner wall of the drive bracket, and one end of the limit rod passes through the interior of the threaded sleeve, a drying box is installed on the outer wall of the threaded sleeve, an atomizing nozzle is installed on the outer wall of the threaded sleeve, a delivery pump is installed on the top of the cooling water tank, and a pipe is installed at the water inlet end of the delivery pump.

[0010] Preferably, the top of the water inlet tank is provided with a filtration mechanism, which is used to filter the added water.

[0011] Preferably, the filtration mechanism includes a filter frame located at the top of the cooling water tank.

[0012] Preferably, a filter screen is installed on the inner wall of the filter frame, and an assembly screw is installed on the top of the cooling water tank.

[0013] Preferably, an assembly plate is installed on the outer wall of the filter frame, and an assembly nut is installed around the outer wall of the assembly screw.

[0014] Preferably, a bearing is embedded in the outer wall of the filter frame, a sealing plate is installed on the outer wall of the bearing, and the inner shaft outer wall of the bearing is fixedly connected to the outer wall of the sealing plate.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This utility model, by installing a grading mechanism, changes the single water tank inside the cooling water tank to a double water tank. To avoid damage caused by internal stress due to temperature differences during the cooling of the PVC sheath material, this improvement is necessary. First, water is added to the cooling water tank through the inlet tank, and the water enters through the water inlet inclined plate. The solenoid valve in the water inlet is opened, allowing water to enter both sides of the grading plate. The water entry situation inside the cooling water tank can be observed through transparent glass. After the water entry is completed, the solenoid valve in the water inlet is closed, separating the water on both sides. Then, the electric heating wire heats the silver heat-conducting plate, which heats the water on one side. When cooling the PVC sheath, the solenoid valve inside the pipe is opened, and the material is cooled by the delivery pump using low-temperature cooling water. Then, the solenoid valve inside the pipe is closed, and the solenoid valve in the branch pipe is opened, using the heated water for slow cooling and shaping, thus avoiding damage to the material due to internal stress.

[0017] 2. This utility model filters the added water by installing a filtration mechanism. Existing water often contains impurities, and a large amount of impurities entering the atomizing nozzle can cause clogging. Therefore, this needs to be improved. First, the assembly plate is inserted through the outside of the assembly screw, and then the assembly nut is fixed to the outside of the assembly screw to fix the position of the assembly plate. The filter frame is then installed on the top of the water inlet tank. Then, the filter screen is used to filter the impurities in the water, and the sealing plate is used to seal the top of the filter frame by rotating the bearing. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the front structure of the grading plate of this utility model;

[0020] Figure 3 This is a schematic diagram of the front structure of the filter frame of this utility model;

[0021] Figure 4 This is a schematic diagram of the front structure of the filter screen of this utility model.

[0022] In the diagram: 1. Cooling water tank; 2. Mounting plate; 3. Water inlet tank; 4. Drive bracket; 5. Drive motor; 6. Two-way threaded screw; 7. Limiting rod; 8. Threaded sleeve; 9. Drying box; 10. Atomizing nozzle; 11. Transfer pump; 12. Pipeline; 13. Grading plate; 14. Water inlet tank; 15. Branch pipe; 16. Solenoid valve; 17. Water inlet ramp; 18. Observation slot; 19. Transparent glass; 20. Electric heating wire; 21. Silver heat-conducting plate; 22. Filter frame; 23. Filter screen; 24. Assembly screw; 25. Assembly plate; 26. Assembly nut; 27. Bearing; 28. Sealing plate. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] Please see Figure 1 and Figure 2A closed-loop cooling device for producing polyvinyl chloride (PVC) sheathing material includes: a cooling water tank 1, a drying chamber 9, and atomizing nozzles 10. An mounting plate 2 is installed on the outer wall of the cooling water tank 1. A water inlet trough 3 is provided on the top of the cooling water tank 1. A drive bracket 4 is installed on the outer wall of the cooling water tank 1. A drive motor 5 is installed on the outer wall of the drive bracket 4. A bidirectional threaded screw 6 is installed at the output end of the drive motor 5. Two sets of threaded sleeves 8 are installed around the outer wall of the bidirectional threaded screw 6. A limit rod 7 is installed on the inner wall of the drive bracket 4, with one end of the limit rod 7 penetrating the interior of the threaded sleeve 8. The drying chamber 9 is installed on the outer wall of the threaded sleeve 8. The atomizing nozzles 10 are installed on the outer wall of the threaded sleeve 8. A delivery pump 1 is installed on the top of the cooling water tank 1. 1. A pipe 12 is installed at the water inlet of the delivery pump 11. When in use, the cooling water tank 1 is installed in the corresponding position through the mounting plate 2 and bolts. The delivery pump 11, the drying box 9 (the drying box 9 is equipped with a drying fan) and the drive motor 5 work. The drive motor 5 drives the bidirectional threaded screw 6 to rotate, so that the two sets of threaded sleeves 8 move along the limit rod 7, so that the drying box 9 and the atomizing nozzle 10 reciprocate. Then the drying fan inside the drying box 9 works to cool down the freshly extruded PVC sheath material. At the same time, the delivery pump 11 can draw out the cooling water in the cooling water tank 1 and supply it to the atomizing nozzle 10 through the hose. The atomizing nozzle 10 can form an atomized liquid, which can then quickly cool the freshly extruded PVC sheath material.

[0027] Please see Figure 1 and Figure 2The inner wall of the cooling water tank 1 is equipped with a grading mechanism to convert the single water tank inside the cooling water tank 1 into a double water tank. The grading mechanism includes a grading plate 13, branch pipes 15, and a silver heat-conducting plate 21. The grading plate 13 is located on the inner wall of the cooling water tank 1, and the inner wall of the grading plate 13 is equipped with a water inlet groove 14. A branch pipe 15 is installed on the outer wall of the pipe 12, and the branch pipe 15 and the pipe 12 are internally connected. Solenoid valves 16 are installed on the inner walls of the branch pipe 15, the pipe 12, and the water inlet groove 14. A water inlet ramp 17 is installed on the inner wall of the cooling water tank 1. The inner wall of the cooling water tank 1 is provided with an observation slot 18, and the inner wall of the observation slot 18 is fitted with a transparent glass 19. An electric heating wire 20 is installed on the outer wall of the grading plate 13, and a silver heat-conducting plate 21 is installed on the outer wall of the grading plate 13, with the silver heat-conducting plate 21 located on top of the electric heating wire 20. To avoid damage caused by internal stress due to temperature differences during the recooling of the PVC sheath material, improvements are needed. First, water is added to the cooling water tank 1 through the water inlet trough 3, and then through the water inlet ramp 17 (slope 5°-10°), and the water inlet trough... Solenoid valve 16 in section 14 opens, allowing water to enter both sides of the grading plate 13. The water intake inside the cooling water tank 1 can be observed through transparent glass 19. After water intake is complete, solenoid valve 16 in the water inlet trough 14 closes, separating the water on both sides. Then, electric heating wire 20 operates to heat the silver heat-conducting plate 21. The silver heat-conducting plate 21 heats the water on one side to a temperature of 25-30°C. A temperature controller probe is installed on the heated side and is inserted into the water. The temperature is set externally using the temperature controller knob (28 degrees Celsius). When the water temperature is below 28℃, the thermostat closes and the electric heating wire 20 is energized to heat. When the water temperature rises to 30℃, the thermostat disconnects and stops heating. When the polyethylene sheath is cooled, the solenoid valve 16 inside the pipe 12 opens, and the material is cooled by the delivery pump 11 using low-temperature cooling water (15-20℃). Then the solenoid valve 16 inside the pipe 12 closes, and the solenoid valve 16 in the branch pipe 15 opens, so the heated water is used for slow cooling and shaping to avoid internal stress that could damage the material.

[0028] Please see Figure 3 and Figure 4A filtration mechanism is provided at the top of the water inlet tank 3 to filter the added water. The filtration mechanism includes a filter frame 22, which is located at the top of the cooling water tank 1. A filter screen 23 is installed on the inner wall of the filter frame 22. An assembly screw 24 is installed at the top of the cooling water tank 1. An assembly plate 25 is installed on the outer wall of the filter frame 22. An assembly nut 26 is installed around the outer wall of the assembly screw 24. A bearing 27 is embedded in the outer wall of the filter frame 22. A sealing plate 28 is installed on the outer wall of the bearing 27, and the inner shaft outer wall of the bearing 27 is fixed to the outer wall of the sealing plate 28. The connection is problematic because existing water often contains impurities, and a large amount of impurities entering the atomizing nozzle 10 can cause clogging. Therefore, improvements are needed. First, the assembly plate 25 is inserted through the outside of the assembly screw 24, and then the assembly nut 26 is fixed to the outside of the assembly screw 24, thus fixing the position of the assembly plate 25. Then, the filter frame 22 is installed on the top of the water inlet tank 3. Subsequently, the filter screen 23 (with a pore size of 50um) is used to filter impurities in the water, and the sealing plate 28 is used to seal the top of the filter frame 22 by rotating through the bearing 27.

[0029] Working principle: During use, the cooling water tank 1 is installed in the corresponding position using the mounting plate 2 and bolts. The delivery pump 11, the drying box 9 (which contains a drying fan), and the drive motor 5 operate. The drive motor 5 drives the bidirectional threaded screw 6 to rotate, causing the two sets of threaded sleeves 8 to move along the limit rod 7. This causes the drying box 9 and the atomizing nozzle 10 to reciprocate, activating the drying fan inside the drying box 9 to cool the freshly extruded PVC sheath material. Simultaneously, the delivery pump 11 draws cooling water from the cooling water tank 1 and supplies it to the atomizing nozzle 10 through a hose. The atomizing nozzle 10 forms an atomized liquid, which then atomizes the freshly extruded PVC. To prevent damage caused by internal stress due to temperature differences during the rapid cooling of the PVC sheath material, an improvement is needed. First, water is added to the cooling water tank 1 through the water inlet trough 3, and then through the water inlet ramp 17 (slope 5°-10°). The solenoid valve 16 in the water inlet trough 14 is opened, allowing water to enter both sides of the grading plate 13. The water inlet status inside the cooling water tank 1 is observed through the transparent glass 19. After water inlet is complete, the solenoid valve 16 in the water inlet trough 14 is closed, separating the water on both sides. Then, the electric heating wire 20 heats the silver heat-conducting plate 21, which in turn heats the water on one side. Heating is performed at a temperature of 25-30℃. A temperature controller probe is installed on the heating side and enters the water. The temperature is set externally via the temperature controller knob (28℃). When the water temperature is below 28℃, the temperature controller closes, and the electric heating wire 20 is energized. When the water temperature reaches 30℃, the temperature controller disconnects, stopping heating. Then, when cooling the polyoxyethylene sheath, the solenoid valve 16 inside pipe 12 opens, allowing the material to be cooled by the transfer pump 11 using low-temperature cooling water (15-20℃). Subsequently, the solenoid valve 16 inside pipe 12 closes, causing the solenoid valve 16 in branch pipe 15 to open, utilizing the heated... Water is slowly cooled and solidified to avoid internal stress that could damage the material. Existing water often contains impurities, and a large amount of impurities entering the atomizing nozzle 10 can cause clogging. Therefore, this needs to be improved. First, the assembly plate 25 is inserted through the outside of the assembly screw 24. Then, the assembly nut 26 is fixed to the outside of the assembly screw 24, thus fixing the position of the assembly plate 25. The filter frame 22 is then installed on the top of the water inlet tank 3. The filter screen 23 (with a pore size of 50um) is then used to filter the impurities in the water, and the sealing plate 28 is used to seal the top of the filter frame 22 by rotating through the bearing 27.

[0030] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A closed-loop cooling device for the production of polyvinyl chloride (PVC) sheathing materials, characterized in that, Includes: a cooling water tank (1), a drying box (9) and an atomizing nozzle (10). The inner wall of the cooling water tank (1) is provided with a grading mechanism, which is used to change the single water tank inside the cooling water tank (1) into a double water tank. The grading mechanism includes a grading plate (13), a branch pipe (15), and a silver heat-conducting plate (21). The grading plate (13) is located on the inner wall of the cooling water tank (1). The inner wall of the grading plate (13) is provided with a water inlet groove (14). The outer wall of the pipe (12) is equipped with a branch pipe (15), and the branch pipe (15) and the pipe (12) are internally connected. The inner walls of the branch pipe (15), the pipe (12), and the water inlet groove (14) are all equipped with solenoid valves (16). The inner wall of the cooling water tank (1) is equipped with a water inlet inclined plate (17). The inner wall of the cooling water tank (1) is provided with an observation groove (18). The inner wall of the observation groove (18) is equipped with transparent glass (19). The outer wall of the grading plate (13) is equipped with an electric heating wire (20). The outer wall of the grading plate (13) is equipped with a silver heat-conducting plate (21), and the silver heat-conducting plate (21) is located on top of the electric heating wire (20).

2. The closed-loop cooling equipment for producing polyvinyl chloride sheathing material according to claim 1, characterized in that: The cooling water tank (1) is equipped with an installation plate (2) on its outer wall. The top of the cooling water tank (1) is provided with a water inlet trough (3). The cooling water tank (1) is equipped with a drive bracket (4) on its outer wall. The drive bracket (4) is equipped with a drive motor (5) on its outer wall. The output end of the drive motor (5) is equipped with a bidirectional threaded screw (6). The outer wall of the bidirectional threaded screw (6) is surrounded by two sets of threaded sleeves (8). The inner wall of the drive bracket (4) is equipped with a limit rod (7), and one end of the limit rod (7) passes through the inside of the threaded sleeve (8). The outer wall of the threaded sleeve (8) is equipped with a drying box (9). The outer wall of the threaded sleeve (8) is equipped with an atomizing nozzle (10). The top of the cooling water tank (1) is equipped with a delivery pump (11). The water inlet end of the delivery pump (11) is equipped with a pipe (12).

3. The closed-loop cooling equipment for producing polyvinyl chloride sheathing material according to claim 2, characterized in that: The top of the water inlet tank (3) is equipped with a filter mechanism, which is used to filter the added water.

4. The closed-loop cooling equipment for producing polyvinyl chloride sheathing material according to claim 3, characterized in that: The filtration mechanism includes a filter frame (22) located on top of the cooling water tank (1).

5. A closed-loop cooling device for producing polyvinyl chloride sheathing material according to claim 4, characterized in that: The filter frame (22) is fitted with a filter screen (23) on its inner wall, and the cooling water tank (1) is fitted with an assembly screw (24) on its top.

6. The closed-loop cooling equipment for producing polyvinyl chloride sheathing material according to claim 5, characterized in that: An assembly plate (25) is installed on the outer wall of the filter frame (22), and an assembly nut (26) is installed around the outer wall of the assembly screw (24).

7. The closed-loop cooling equipment for producing polyvinyl chloride sheathing material according to claim 4, characterized in that: The outer wall of the filter frame (22) is inlaid with a bearing (27), and the outer wall of the bearing (27) is fitted with a sealing plate (28), and the inner shaft outer wall of the bearing (27) is fixedly connected to the outer wall of the sealing plate (28).

Images