Cooling water jacket circulation water supply device for screw extruders used in fiber spinning

Abstract

This utility model discloses a circulating water supply device for the cooling water jacket of a screw extruder used in fiber spinning. It includes a circulating water tank with a support column at the bottom and a return water inlet at the top. The device is characterized by: an upper baffle and a lower baffle horizontally arranged inside the circulating water tank; a heat exchange chamber above the upper baffle; a water pump installation chamber between the upper and lower baffles; and a pressure cooling water chamber below the lower baffle. Several water flow blockage monitors connected to the pressure cooling water chambers are located at the bottom of the circulating water tank. The water flow blockage monitors in this utility model employ a mechanical structure, are not easily damaged, and have a long service life. By observing the scale value corresponding to the valve plate position, it determines whether the annular water jacket outside the screw extruder is blocked or severely blocked, and whether maintenance and unblocking are necessary, thus allowing for timely disassembly of a specific annular water jacket.

Description

Technical Field

[0001] This utility model belongs to the field of hair fiber production technology, specifically relating to a cooling water jacket circulating water supply device for a screw extruder used in hair fiber spinning. Background Technology

[0002] The production of hair fiber involves a cooling system during the spinning process. This system is designed to dissipate excess heat generated by the shearing and frictional heating of the screw extruder during operation, preventing issues such as decreased melt viscosity or plastic decomposition due to temperature rise. The hair fiber production workshop operates multiple screw extruders simultaneously, each equipped with an external cooling water jacket. A circulating water tank is located outside the workshop, housing a pump that simultaneously supplies cooling water to multiple cooling water jackets. Cooling water is pumped from the tank to the jackets via cold water pipes, and the hot water exchanged within the jackets returns to the tank via hot water pipes. Over time, various blockages can occur within the cooling water jackets, affecting the cooling effect on the screw extruders and consequently impacting spinning quality. Currently, the cleaning cycle for the cooling water jackets is determined by observing for blockages. Therefore, the protective sleeves are removed periodically to check for blockages and clean the interior. This method is somewhat reactive; sometimes, disassembly reveals no blockages, impacting work efficiency. Utility Model Content

[0003] In order to solve the above-mentioned technical problems in the prior art, this utility model provides a circulating water supply device for cooling water jackets of screw extruders for hair fiber spinning, which can monitor in real time and intuitively whether the external cooling water jackets of multiple screw extruders are blocked.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a circulating water supply device for a screw extruder for fiber spinning, comprising a circulating water tank, a support column at the bottom of the circulating water tank, a return water inlet at the top of the circulating water tank, an upper baffle and a lower baffle horizontally arranged inside the circulating water tank, a heat exchange chamber above the upper baffle inside the circulating water tank, a water pump installation chamber between the upper and lower baffle inside the circulating water tank, a pressure cooling water chamber below the lower baffle inside the circulating water tank, and several water flow blockage monitoring devices connected to the pressure cooling water chamber at the bottom of the circulating water tank.

[0005] The heat exchange chamber is equipped with several sets of baffle-type heat exchange coils. All sets of baffle-type heat exchange coils are arranged at intervals in the front-to-back direction. The water inlet of each set of baffle-type heat exchange coils is located on the left side of the circulating water tank and adjacent to the upper baffle. The water inlet of each set of baffle-type heat exchange coils is connected to a main water inlet pipe. The water outlet of each set of baffle-type heat exchange coils is located on the upper right side of the circulating water tank. The water outlet of each set of baffle-type heat exchange coils is connected to a main water outlet pipe.

[0006] The pump installation chamber houses a variable frequency motor and a circulating water pump. The main shaft of the variable frequency motor is connected to the power input shaft of the circulating water pump. The inlet of the circulating water pump is connected to the upper partition and communicates with the heat exchange chamber. The outlet of the circulating water pump is connected to the lower partition and communicates with the pressure cooling water chamber.

[0007] Each water flow blockage monitor includes, from top to bottom, an inlet pipe connector, a transparent conical tube, a cover plate, and an outlet pipe connector. The inlet pipe connector is connected to the bottom of the circulating water tank and communicates with the pressure cooling water chamber. The outlet pipe connector is connected to the cold water pipe that supplies water to the cooling water jacket outside the screw extruder. The transparent conical tube is smaller at the top and larger at the bottom. The upper end of the transparent conical tube is connected to the lower end of the inlet pipe connector. The cover plate is detachably connected to the lower end of the transparent conical tube. The upper end of the outlet pipe connector is connected to the center of the cover plate. The upper surface of the cover plate is equipped with an elastic valve assembly located inside the transparent conical tube. The outside of the transparent conical tube has scale lines along the generatrix direction for monitoring the position of the elastic valve assembly.

[0008] The resilient valve assembly includes a disc-shaped valve plate, which is aligned with and parallel to the cover plate. The bottom surface of the valve plate and the top surface of the cover plate are connected by several compression springs, which are arranged in a circumferential array along the center line of the cover plate. The bottom surface of the valve plate is provided with an upper positioning post located inside the upper end of the compression spring, and the top surface of the bottom plate is provided with a lower positioning post located inside the lower end of the compression spring.

[0009] The lower outer edge of the transparent conical tube is integrally provided with an annular plate. The top surface of the cover plate and the bottom surface of the annular plate are attached to each other and connected as one unit by several bolt assemblies arranged in a circular array. A sealing ring is provided between the top surface of the cover plate and the bottom surface of the annular plate.

[0010] Several tension members are provided between the top surface of the cover plate and the inner wall of the transparent conical tube. All tension members are arranged in a circumferential array along the center line of the cover plate and are located outside the elastic valve assembly.

[0011] Each tensioning component includes a first L-shaped plate and a second L-shaped plate. The lower end of the vertical section of the first L-shaped plate is fixedly connected to the top surface of the cover plate, and the upper end of the vertical section of the second L-shaped plate is fixedly connected to the inner wall of the transparent conical tube. A hook gap is formed between the upper horizontal section of the first L-shaped plate and the cover plate. The lower horizontal section of the second L-shaped plate extends into the hook gap. The bottom surface of the upper horizontal section of the first L-shaped plate and the top surface of the lower horizontal section of the second L-shaped plate are pressed together.

[0012] Both the outer circle of the cover plate and the outer circle of the annular plate are provided with corresponding upper and lower installation positioning mark grooves.

[0013] Compared with the prior art, the present invention has the following advantages by adopting the above technical solution: 1) In this invention, each water flow blockage monitor has a lower outlet pipe connector connected to a cold water pipe, which supplies cooling water to the cooling water jacket outside a screw extruder. The hot water outlet of the cooling water jacket is connected to the return water port at the top of the circulating water tank via a hot water pipe. The hot water, which absorbs the heat generated during the operation of the screw extruder, enters the heat exchange chamber at the top of the circulating water tank and exchanges heat with the cool water flowing through several sets of baffle-type heat exchange coils. After the water in the heat exchange chamber is cooled, it is pumped downwards by the circulating water pump to the pressure cooling water chamber. The cold water in the pressure cooling water chamber simultaneously supplies water to several water flow blockage monitors. The pressure cooling water chamber is equivalent to a multi-port pipe, allowing water at the same pressure to flow into multiple water flow blockage monitors simultaneously. The side of the circulating water tank is equipped with an inspection door corresponding to the water pump installation chamber.

[0014] 2) Install several water flow blockage monitors at the bottom of the circulating water tank. This allows for simultaneous monitoring of blockages within multiple cooling water jackets, and real-time observation of water flow smoothness based on the scale corresponding to the valve plate position. A transparent conical tube is installed to facilitate observation of the valve plate's position on the scale lines, enabling determination of whether a particular cooling water jacket is blocked.

[0015] 2) The cover plate is fixedly connected to the annular plate by several bolt assemblies, which facilitates the installation of the internal elastic valve assembly, and a sealing ring is provided to ensure the reliability of the seal.

[0016] 3) Due to the large area of ​​the cover plate and the small diameter of the outlet pipe joint, a tensioning component is specially designed to prevent the cover plate from bulging downwards in the middle due to high water pressure and thus affecting the sealing performance. When the cover plate is under pressure, the second L-shaped plate pulls on the first L-shaped plate, thereby keeping the cover plate level and ensuring the seal between the cover plate and the annular plate, while also improving the strength of the cover plate.

[0017] 4) When installing the cover plate, first make the installation positioning mark groove on the cover plate offset from the installation positioning mark groove on the ring plate by a certain angle. Then rotate the cover plate or transparent conical tube to make the installation positioning mark grooves on the cover plate and the ring plate correspond. The holes of the corresponding through bolt assemblies between the cover plate and the ring plate are all connected one by one. At this time, the horizontal section of the lower end of the second L-shaped plate extends into the hook gap to ensure that each tensioning component is assembled and connected in place.

[0018] In summary, this utility model monitors the internal water flow of the corresponding cooling water jacket by setting several water flow blockage monitors at the bottom of the circulating water tank. The water flow blockage monitors adopt a mechanical structure, which is not easily damaged and has a long service life. By observing the scale value corresponding to the position of the valve plate, it can be determined whether the annular water jacket outside the screw extruder is blocked or severely blocked, and whether maintenance and unblocking are required, so that a certain annular water jacket can be disassembled in a timely manner. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of a water flow blockage monitor in the absence of water pressure. Figure 3 This is a schematic diagram of the water flow blockage monitor during normal water supply operation. Figure 4 for Figure 2 and Figure 3 Top view of the middle cover plate. Detailed Implementation

[0020] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] like Figures 1-4 As shown, the cooling water jacket circulation water supply device for a screw extruder for hair fiber spinning of this utility model includes a circulating water tank 16, a support column 17 at the bottom of the circulating water tank 16, a return water port 18 at the top of the circulating water tank 16, an upper partition 19 and a lower partition 20 horizontally arranged inside the circulating water tank 16, a heat exchange chamber 21 above the upper partition 19 inside the circulating water tank 16, a water pump installation chamber 22 between the upper partition 19 and the lower partition 20 inside the circulating water tank 16, a pressure cooling water chamber 23 below the lower partition 20 inside the circulating water tank 16, and several water flow blockage monitoring devices 24 connected to the pressure cooling water chamber 23 at the bottom of the circulating water tank 16.

[0022] The heat exchange chamber 21 is equipped with several sets of baffle-type heat exchange coils 25. All sets of baffle-type heat exchange coils 25 are arranged at intervals in the front-to-back direction. The water inlet of each set of baffle-type heat exchange coils 25 is located on the left side of the circulating water tank 16 and adjacent to the upper partition 19. The water inlet of each set of baffle-type heat exchange coils 25 is connected to a main water inlet pipe 26. The water outlet of each set of baffle-type heat exchange coils 25 is located on the upper right side of the circulating water tank 16. The water outlet of each set of baffle-type heat exchange coils 25 is connected to a main water outlet pipe 27.

[0023] A variable frequency motor and a circulating water pump 28 are installed in the water pump installation chamber 22. The main shaft of the variable frequency motor is connected to the power input shaft of the circulating water pump 28. The water inlet of the circulating water pump 28 is connected to the upper partition 19 and communicates with the heat exchange chamber 21. The water outlet of the circulating water pump 28 is connected to the lower partition 20 and communicates with the pressure cooling water chamber 23.

[0024] Each water flow blockage monitor 24 includes, from top to bottom, an inlet pipe connector 1, a transparent conical tube 2, a cover plate 3, and an outlet pipe connector 4. The inlet pipe connector 1 is connected to the bottom of the circulating water tank 16 and communicates with the pressure cooling water chamber 23. The outlet pipe connector 4 is connected to the cold water pipe that supplies water to the cooling water jacket outside the screw extruder. The transparent conical tube 2 is smaller at the top and larger at the bottom. The upper end of the transparent conical tube 2 is connected to the lower end of the inlet pipe connector 1. The cover plate 3 is detachably connected to the lower port of the transparent conical tube 2. The upper end of the outlet pipe connector 4 is connected to the center of the cover plate 3. The upper surface of the cover plate 3 is provided with an elastic valve assembly located inside the transparent conical tube. The outside of the transparent conical tube 2 is provided with a scale line 5 along the generatrix direction for monitoring the position of the elastic valve assembly.

[0025] The elastic valve assembly includes a disc-shaped valve plate 6, which is co-centered and parallel to the cover plate 3. The bottom surface of the valve plate 6 and the top surface of the cover plate 3 are connected by a number of compression springs 7. The number of springs are arranged in a circumferential array along the center line of the cover plate 3. The bottom surface of the valve plate 6 is provided with an upper positioning post 8 located inside the upper end of the compression spring 7, and the top surface of the bottom plate is provided with a lower positioning post 9 located inside the lower end of the compression spring 7.

[0026] The lower outer edge of the transparent conical tube 2 is integrally provided with an annular plate 10. The top surface of the cover plate 3 is attached to the bottom surface of the annular plate 10 and connected as a whole by a number of bolt assemblies 11 arranged in a circular array. A sealing ring 12 is provided between the top surface of the cover plate 3 and the bottom surface of the annular plate 10.

[0027] Several tension members are provided between the top surface of the cover plate 3 and the inner wall of the transparent conical tube 2. All tension members are arranged in a circumferential array along the center line of the cover plate 3 and are located outside the elastic valve assembly.

[0028] Each tensioning member includes a first L-shaped plate 13 and a second L-shaped plate 14. The lower end of the vertical section of the first L-shaped plate 13 is fixedly connected to the top surface of the cover plate 3, and the upper end of the vertical section of the second L-shaped plate 14 is fixedly connected to the inner wall of the transparent conical tube 2. A hook gap is formed between the horizontal section of the upper end of the first L-shaped plate 13 and the cover plate 3. The horizontal section of the lower end of the second L-shaped plate 14 extends into the hook gap. The bottom surface of the horizontal section of the upper end of the first L-shaped plate 13 is pressed into the top surface of the horizontal section of the lower end of the second L-shaped plate 14.

[0029] Both the outer circle of the cover plate 3 and the outer circle of the annular plate 10 are provided with corresponding upper and lower installation positioning mark grooves 15.

[0030] The working process of this utility model is as follows: The water outlet connector 4 at the lower end of each water flow blockage monitor 24 in this utility model is connected to a cold water pipe to supply cooling water to the cooling water jacket outside a screw extruder. The hot water outlet of the cooling water jacket is connected to the return water port 18 at the top of the circulating water tank 16 through a hot water pipe. The hot water that absorbs the heat generated during the operation of the screw extruder enters the heat exchange chamber 21 at the top of the circulating water tank 16 and exchanges heat with the cool water flowing into several sets of baffle heat exchange coils 25. After the water in the heat exchange chamber 21 is cooled down, it is pumped down into the pressure cooling water chamber 23 by the circulating water pump 28. The cold water in the pressure cooling water chamber 23 simultaneously supplies water to several water flow blockage monitors 24. The pressure cooling water chamber 23 is equivalent to a multi-port pipe, and the same pressure water is simultaneously introduced into multiple water flow blockage monitors 24.

[0031] The specific working process of monitoring whether a cooling water jacket is blocked using the water flow blockage monitor 24 is as follows: High-pressure water enters the transparent conical tube through the inlet pipe connector 1, applying pressure to the valve plate 6. The valve plate 6 moves downward, compressing the compression spring 7. The high-pressure water flows downward through the annular gap between the outer circle of the valve plate 6 and the inner wall of the transparent conical tube, and then exits through the outlet pipe connector 4. Since there is a scale line 5 on the outer wall of the transparent conical tube 2 for monitoring the position of the valve plate 6, the position of the valve plate 6 is 0 when the outer circle of the valve plate 6 contacts the inner circle of the transparent conical tube. The scale line 5 is marked with numbers sequentially from 0 downward. The scale value corresponding to the position of the valve plate 6 is set to the normal water pressure range of 8-20. When the scale value corresponding to the valve plate 6 is in the range of 0-8, it indicates that a blockage has occurred in the cooling water jacket. The smaller the scale value, the more serious the blockage. At this time, it is necessary to stop the spinning operation and disassemble the cooling water jacket for cleaning.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solution of this utility model, and these modifications or equivalent substitutions cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of this utility model.

Claims

1. A circulating water supply device for a cooling water jacket of a screw extruder for fiber spinning, comprising a circulating water tank, a support column at the bottom of the circulating water tank, and a return water inlet at the top of the circulating water tank, characterized in that: The circulating water tank is horizontally equipped with an upper baffle and a lower baffle. Above the upper baffle is a heat exchange chamber, between the upper and lower baffles is a water pump installation chamber, and below the lower baffle is a pressure cooling water chamber. At the bottom of the circulating water tank are several water flow blockage monitors connected to the pressure cooling water chamber.

2. The cooling water jacket circulating water supply device for a screw extruder for spinning hair fibers according to claim 1, characterized in that: The heat exchange chamber is equipped with several sets of baffle-type heat exchange coils. All sets of baffle-type heat exchange coils are arranged at intervals in the front-to-back direction. The water inlet of each set of baffle-type heat exchange coils is located on the left side of the circulating water tank and adjacent to the upper baffle. The water inlet of each set of baffle-type heat exchange coils is connected to a main water inlet pipe. The water outlet of each set of baffle-type heat exchange coils is located on the upper right side of the circulating water tank. The water outlet of each set of baffle-type heat exchange coils is connected to a main water outlet pipe.

3. The cooling water jacket circulating water supply device for a screw extruder for spinning hair fibers according to claim 1, characterized in that: The pump installation chamber houses a variable frequency motor and a circulating water pump. The main shaft of the variable frequency motor is connected to the power input shaft of the circulating water pump. The inlet of the circulating water pump is connected to the upper partition and communicates with the heat exchange chamber. The outlet of the circulating water pump is connected to the lower partition and communicates with the pressure cooling water chamber.

4. The cooling water jacket circulating water supply device for a screw extruder for spinning hair fibers according to claim 1, characterized in that: Each water flow blockage monitor includes, from top to bottom, an inlet pipe connector, a transparent conical tube, a cover plate, and an outlet pipe connector. The inlet pipe connector is connected to the bottom of the circulating water tank and communicates with the pressure cooling water chamber. The outlet pipe connector is connected to the cold water pipe that supplies water to the cooling water jacket outside the screw extruder. The transparent conical tube is smaller at the top and larger at the bottom. The upper end of the transparent conical tube is connected to the lower end of the inlet pipe connector. The cover plate is detachably connected to the lower end of the transparent conical tube. The upper end of the outlet pipe connector is connected to the center of the cover plate. The upper surface of the cover plate is equipped with an elastic valve assembly located inside the transparent conical tube. The outside of the transparent conical tube has scale lines along the generatrix direction for monitoring the position of the elastic valve assembly.

5. The cooling water jacket circulating water supply device for a screw extruder for spinning hair fibers according to claim 4, characterized in that: The resilient valve assembly includes a disc-shaped valve plate, which is aligned with and parallel to the cover plate. The bottom surface of the valve plate and the top surface of the cover plate are connected by several compression springs, which are arranged in a circumferential array along the center line of the cover plate. The bottom surface of the valve plate is provided with an upper positioning post located inside the upper end of the compression spring, and the top surface of the bottom plate is provided with a lower positioning post located inside the lower end of the compression spring.

6. The cooling water jacket circulating water supply device for a screw extruder for spinning hair fibers according to claim 4 or 5, characterized in that: The lower outer edge of the transparent conical tube is integrally provided with an annular plate. The top surface of the cover plate and the bottom surface of the annular plate are attached to each other and connected as one unit by several bolt assemblies arranged in a circular array. A sealing ring is provided between the top surface of the cover plate and the bottom surface of the annular plate.

7. The cooling water jacket circulating water supply device for a screw extruder for spinning hair fibers according to claim 4 or 5, characterized in that: Several tension members are provided between the top surface of the cover plate and the inner wall of the transparent conical tube. All tension members are arranged in a circumferential array along the center line of the cover plate and are located outside the elastic valve assembly.

8. The cooling water jacket circulating water supply device for a screw extruder for spinning hair fibers according to claim 7, characterized in that: Each tensioning component includes a first L-shaped plate and a second L-shaped plate. The lower end of the vertical section of the first L-shaped plate is fixedly connected to the top surface of the cover plate, and the upper end of the vertical section of the second L-shaped plate is fixedly connected to the inner wall of the transparent conical tube. A hook gap is formed between the upper horizontal section of the first L-shaped plate and the cover plate. The lower horizontal section of the second L-shaped plate extends into the hook gap. The bottom surface of the upper horizontal section of the first L-shaped plate and the top surface of the lower horizontal section of the second L-shaped plate are pressed together.

9. The cooling water jacket circulating water supply device for a screw extruder for spinning hair fibers according to claim 8, characterized in that: Both the outer circle of the cover plate and the outer circle of the annular plate are provided with corresponding upper and lower installation positioning mark grooves.

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