A dual-cylinder fully automatic switching pressure-stabilizing melt filter

Abstract

This invention provides a dual-cylinder fully automatic switching pressure-stabilizing melt filter, comprising a body with a first and second filter cylinder arranged horizontally on the left and right sides, each filter cylinder containing a filter cartridge; a melt inlet and a melt outlet are respectively located at the front and rear ends of the body, corresponding to automatic feed switching valves and automatic discharge switching valves, used to control the entry of melt into different filter cylinders and the discharge of filtered melt; both filter cylinders are connected to exhaust valves to discharge gas from the cylinders. This invention, by employing a dual-cylinder fully automatic switching pressure-stabilizing melt filter, enables filter replacement without stopping production, significantly improving production efficiency; the discharge of gas from the filter cylinders through the first and second exhaust valves ensures the normal operation of the corresponding filter cylinders before use and during switching, making it a crucial component for achieving stable filtration and smooth switching.

Description

Technical Field

[0001] This utility model relates to the technical field of melt filtration equipment, and in particular to a dual-cylinder fully automatic switching pressure-stabilizing melt filter. Background Technology

[0002] The primary function of a melt filter is to remove impurities from the melt and protect the spinneret. Even small impurities can force spinneret replacement, causing a shutdown of the entire production line. Typically, spinneret replacement can only be performed during a filter production line stoppage, and requires depressurization of the filter. The filter's precision should be the same as or finer than the spinneret's precision to extend the spinneret's lifespan.

[0003] However, existing melt filters have many defects and shortcomings: when replacing the spinneret, the production line must be stopped and the filter depressurized, which will lead to production interruption and seriously affect production efficiency; at the same time, frequent shutdowns and replacement of spinnerets will increase production costs, and if impurities are not effectively filtered, small spots or irregular defects will appear on non-woven fabrics and other products, affecting product quality.

[0004] Therefore, there is an urgent need for a melt filter that can switch filter cylinders without stopping the machine, maintain stable melt pressure, and effectively remove gas, so as to improve production efficiency, reduce production costs, and ensure product quality. Utility Model Content

[0005] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a dual-cylinder fully automatic switching pressure-stabilizing melt filter to solve the problems of low production efficiency and high cost in the prior art when the melt filter needs to stop production when changing the spinneret.

[0006] To achieve the above and other related objectives, this utility model provides a dual-cylinder fully automatic switching pressure-stabilizing melt filter, comprising a body, wherein a first filter cylinder and a second filter cylinder are arranged on the left and right sides of the body, and filter cartridges are respectively arranged in the first filter cylinder and the second filter cylinder; a melt inlet and a melt outlet are respectively provided at the front and rear ends of the body, and an automatic feed switching valve and an automatic discharge switching valve are respectively provided corresponding to the melt inlet and the melt outlet. The automatic feed switching valve is used to control the melt to enter the first filter cylinder or the second filter cylinder, and the automatic discharge switching valve is used to control the melt after being filtered by the first filter cylinder or the second filter cylinder to be discharged from the melt outlet; the first filter cylinder and the second filter cylinder are respectively connected to a first exhaust valve and a second exhaust valve to discharge the gas in the corresponding filter cylinder.

[0007] In one embodiment of this utility model, the automatic feed switching valve, the automatic discharge switching valve, the first exhaust valve, and the second exhaust valve are all equipped with electric actuators, and the electric actuators are controlled by the PLC control system to drive the valves to operate.

[0008] In one embodiment of this utility model, pressure detectors are provided at both the melt inlet and the melt outlet, and the PLC control system controls the opening and closing degree of each valve based on the data fed back by the pressure detectors.

[0009] In one embodiment of the present invention, the melt outlet is further connected to a pressure stabilizing pump, and the filtered melt flows from the melt outlet into the spinning box through the pressure stabilizing pump.

[0010] In one embodiment of this utility model, the automatic feed switching valve, the automatic discharge switching valve, the first exhaust valve, and the second exhaust valve all retain a drive handwheel.

[0011] In one embodiment of this utility model, both the automatic feed switching valve and the automatic discharge switching valve are three-way valves. The inlet of the automatic feed switching valve corresponds to the melt inlet, and the two outlets of the automatic feed switching valve correspond to the feed inlets of the two filter cylinders, respectively. The outlet of the automatic discharge switching valve corresponds to the melt outlet, and the two inlets of the automatic discharge switching valve correspond to the discharge outlets of the two filter cylinders, respectively.

[0012] In one embodiment of the present invention, when the first filter cylinder is initially used, both the automatic feed switching valve and the automatic discharge switching valve are connected to the first filter cylinder, the first exhaust valve is fully open, and the first exhaust valve is closed after discharging for 5-10 minutes.

[0013] When switching from the first filter cylinder to the second filter cylinder, first close the automatic feed switching valve connected to the first filter cylinder by 5%, fully open the second exhaust valve, wait for 10 minutes, then close the second exhaust valve, then switch the automatic discharge switching valve to connect to the second filter cylinder, and at the same time connect the automatic feed switching valve to the second filter cylinder, and open the first exhaust valve.

[0014] The principles for initially using the second filter tank and switching from the second filter tank to the first filter tank are the same as those described above.

[0015] As described above, the dual-cylinder fully automatic switching pressure-stabilizing melt filter of this utility model has the following beneficial effects:

[0016] 1. This utility model adopts a dual-cylinder fully automatic switching pressure-stabilizing melt filter, which enables the replacement of the filter screen without stopping production, significantly improving production efficiency; by effectively filtering impurities in the melt, it prevents the spinneret from clogging, avoids the appearance of small spots or irregular defects in the product, and ensures product quality.

[0017] 2. The PLC control system can automatically switch from one filter cylinder to another according to the post-filtration pressure, enabling managed operation and reducing the labor intensity of operators.

[0018] 3. The gas inside the filter cylinder is discharged through the first and second exhaust valves, ensuring the normal operation of the corresponding filter cylinder before use and during the switching process. This is an important component for achieving stable filtration and smooth switching of the filter. Furthermore, the filtered melt is transported by the melt pressure stabilizing pump, which further ensures the stable filtration and transport of the melt.

[0019] 4. The dual-cylinder fully automatic switching pressure-stabilizing melt filter of this utility model can be produced using various recycled materials, reducing production costs. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the dual-cylinder fully automatic switching pressure-stabilizing melt filter disclosed in the embodiments of this utility model.

[0021] Figure 2 This is a front view schematic diagram of the dual-cylinder fully automatic switching pressure-stabilizing melt filter disclosed in the embodiments of this utility model.

[0022] Figure 3 This is a side view of the fully automatic switching pressure-stabilizing melt filter with dual cylinders disclosed in this embodiment of the present invention.

[0023] Figure 4 This is a top view schematic diagram of the dual-cylinder fully automatic switching pressure-stabilizing melt filter disclosed in the embodiments of this utility model.

[0024] Component designation explanation

[0025] 1. Machine body; 2. Melt inlet; 3. Melt outlet; 4. First filter cylinder; 5. Second filter cylinder; 6. Automatic feed switching valve; 7. Automatic discharge switching valve; 8. First exhaust valve; 9. Second exhaust valve; 10. Pressure stabilizing pump. Detailed Implementation

[0026] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. It should be noted that, unless otherwise specified, the following embodiments and features can be combined with each other.

[0027] Please see Figure 1-4This utility model provides a dual-cylinder fully automatic switching pressure-stabilizing melt filter, including a body 1. The body 1 contains a first filter cylinder 4 and a second filter cylinder 5, arranged horizontally. Filter cartridges are installed in both the first and second filter cylinders. A melt inlet 2 and a melt outlet 3 are respectively located at the front and rear ends of the body 1. An automatic feed switching valve 6 and an automatic discharge switching valve 7 are respectively installed at the melt inlet 2 and melt outlet 3. The automatic feed switching valve 6 controls the melt to enter either the first filter cylinder 4 or the second filter cylinder 5, and the automatic discharge switching valve 7 controls the melt filtered by the first filter cylinder 4 or the second filter cylinder 5 to exit from the melt outlet 3. The first filter cylinder 4 and the second filter cylinder 5 are respectively connected to a first exhaust valve 8 and a second exhaust valve 9 to discharge gas from their respective filter cylinders. The exhaust valves can discharge gas from the filter cylinders, ensuring the normal operation of the corresponding filter cylinders before use and during switching, and are important components for achieving stable filtration and smooth switching.

[0028] Specifically, both the automatic feed switching valve 6 and the automatic discharge switching valve 7 are three-way valves. The inlet of the automatic feed switching valve 6 corresponds to the melt inlet 2, and its two outlets correspond to the feed inlets of the two filter cylinders, respectively. The outlet of the automatic discharge switching valve 7 corresponds to the melt outlet 3, and its two inlets correspond to the discharge outlets of the two filter cylinders, respectively. This three-way valve design allows the melt to flexibly switch its flow to different filter cylinders as needed, enabling continuous operation of the filtration system and avoiding production interruptions caused by filter cartridge replacement or cleaning.

[0029] Furthermore, the automatic feed switching valve 6, automatic discharge switching valve 7, first exhaust valve 8, and second exhaust valve 9 are all equipped with electric actuators. These electric actuators are controlled by the PLC control system to drive the valves. Through the application of electric actuators, each valve can achieve precise opening control and rapid response, improving the system's automation level and operational stability. Simultaneously, these valves all retain drive handwheels, allowing for valve opening and closing adjustments in case of electrical system failure or manual operation, enhancing system reliability and emergency operation capabilities.

[0030] Both melt inlet 2 and melt outlet 3 are equipped with pressure detectors. The PLC control system controls the opening and closing of each valve based on the data fed back from the pressure detectors. The pressure detectors monitor pressure changes within the system in real time. When an increase in filter cartridge resistance is detected, leading to abnormal pressure, the PLC system automatically adjusts the valve opening or triggers the filter cylinder switching program to ensure the system operates under optimal conditions, extend the filter cartridge's service life, and guarantee the quality of melt filtration.

[0031] The melt outlet 3 is also connected to a pressure stabilizing pump 10. The filtered melt flows from the melt outlet 3 into the spinning box through the pressure stabilizing pump 10. The pressure stabilizing pump 10 can effectively regulate and stabilize the outlet melt pressure, eliminate pressure fluctuations caused by changes in filter cartridge resistance or system fluctuations, provide a stable melt supply for downstream spinning processes, and improve the consistency of product quality.

[0032] The working principle of this dual-cylinder fully automatic switching pressure-stabilizing melt filter is as follows: When the first filter cylinder 4 is initially used, both the automatic feed switching valve 6 and the automatic discharge switching valve 7 are connected to the first filter cylinder 4, and the first exhaust valve 8 is fully open. After discharging for 5-10 minutes, the first exhaust valve 8 is closed. This process can effectively remove air from the system and prevent air bubbles from affecting the filtration quality and downstream processes.

[0033] When switching from the first filter cylinder 4 to the second filter cylinder 5, first close the automatic feed switching valve 6 connected to the first filter cylinder 4 by 5%, fully open the second exhaust valve 9, wait for 10 minutes, then close the second exhaust valve 9. Next, switch the automatic discharge switching valve 7 to the second filter cylinder 5, and simultaneously connect the automatic feed switching valve 6 to the second filter cylinder 5, and open the first exhaust valve 8. This gradual switching method avoids system pressure fluctuations that may be caused by sudden switching, ensuring the smooth operation of the filtration system during the switching process. At the same time, the proper operation of the exhaust valve ensures that there is no residual gas in the newly put-in filter cylinder.

[0034] The initial use of the second filter cylinder 5 and the switching from the second filter cylinder 5 to the first filter cylinder 4 follow the same principle as described above. This dual-cylinder design and automatic switching mechanism allow the system to continue operating without stopping the machine when one filter cylinder needs filter cartridge replacement or maintenance, greatly improving production efficiency and equipment utilization.

[0035] Through the cooperation of the PLC control system and the pressure detector, the entire filter can automatically adjust its operating parameters according to the actual working conditions, achieving intelligent operation. When the filter cartridge resistance of a certain filter cylinder reaches the set threshold, the system will automatically start the switching program, diverting the melt flow to another ready filter cylinder, while maintaining a stable outlet pressure to ensure the continuous and stable operation of the downstream process.

[0036] In summary, this invention, by employing a dual-cylinder fully automatic switching pressure-stabilizing melt filter, enables filter replacement without halting production, significantly improving production efficiency. The first and second exhaust valves discharge gas from the filter cylinders, ensuring their normal operation before use and during switching. These are crucial components for achieving stable filtration and smooth switching. Therefore, this invention effectively overcomes the various shortcomings of existing technologies and possesses high industrial applicability.

[0037] The terms used in this specification, such as "upper", "lower", "left", "right", "front", "back", "middle" and "one", are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Any changes or adjustments to their relative relationships, without substantially altering the technical content, shall also be considered within the scope of implementation of this utility model.

[0038] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit this utility model. All equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A dual-cylinder fully automatic switching pressure-stabilizing melt filter, characterized in that, The device includes a main body, within which are arranged a first filter cylinder and a second filter cylinder, distributed horizontally. Each of the first and second filter cylinders contains a filter cartridge. The main body has a melt inlet and a melt outlet at its front and rear ends, respectively. An automatic feed switching valve and an automatic discharge switching valve are respectively installed at the melt inlet and melt outlet. The automatic feed switching valve controls the melt to enter either the first or second filter cylinder, and the automatic discharge switching valve controls the melt filtered by the first or second filter cylinder to exit from the melt outlet. The first and second filter cylinders are connected to a first exhaust valve and a second exhaust valve, respectively, to discharge gas from their respective filter cylinders.

2. The dual-cylinder fully automatic switching pressure-stabilizing melt filter according to claim 1, characterized in that, The automatic feed switching valve, the automatic discharge switching valve, the first exhaust valve, and the second exhaust valve are all equipped with electric actuators, which are controlled by the PLC control system to drive the valves to operate.

3. The dual-cylinder fully automatic switching pressure-stabilizing melt filter according to claim 2, characterized in that, Both the melt inlet and melt outlet are equipped with pressure detectors, and the PLC control system controls the opening and closing degree of each valve based on the data fed back by the pressure detectors.

4. The dual-cylinder fully automatic switching pressure-stabilizing melt filter according to claim 1, characterized in that, The melt outlet is also connected to a pressure stabilizing pump, and the filtered melt flows from the melt outlet into the spinning box through the pressure stabilizing pump.

5. The dual-cylinder fully automatic switching pressure-stabilizing melt filter according to claim 1, characterized in that, The automatic feed switching valve, automatic discharge switching valve, first exhaust valve, and second exhaust valve all retain a drive handwheel.

6. The dual-cylinder fully automatic switching pressure-stabilizing melt filter according to claim 1, characterized in that, Both the automatic feed switching valve and the automatic discharge switching valve are three-way valves. The inlet of the automatic feed switching valve is set to correspond to the melt inlet, and the two outlets of the automatic feed switching valve are respectively set to correspond to the feed inlets of the two filter cylinders. The outlet of the automatic discharge switching valve is set to correspond to the melt outlet, and the two inlets of the automatic discharge switching valve are respectively set to correspond to the discharge outlets of the two filter cylinders.

7. The dual-cylinder fully automatic switching pressure-stabilizing melt filter according to any one of claims 1-6, characterized in that, When the first filter cylinder is used for the first time, the automatic feed switching valve and the automatic discharge switching valve are both connected to the first filter cylinder, the first exhaust valve is fully open, and the first exhaust valve is closed after discharging for 5-10 minutes. When switching from the first filter cylinder to the second filter cylinder, first close the automatic feed switching valve connected to the first filter cylinder by 5%, fully open the second exhaust valve, wait for 10 minutes, then close the second exhaust valve, then switch the automatic discharge switching valve to connect to the second filter cylinder, and at the same time connect the automatic feed switching valve to the second filter cylinder, and open the first exhaust valve. The principles for initially using the second filter tank and switching from the second filter tank to the first filter tank are the same as those described above.

Images