A fiberglass reinforced polyester spunbond production line web forming suction system

Abstract

This application relates to a web-forming suction system for a glass fiber reinforced polyester spunbond production line, specifically in the field of glass fiber reinforced polyester base fabric equipment. The system includes a suction chamber with a suction assembly communicating with its interior. A first suction fan and a second suction fan, also communicating with the interior of the suction chamber, are respectively installed on the suction chamber. Air supply components are installed at the outlets of both the first and second suction fans, and these components are positioned opposite the suction assembly. This application allows for independent suction of two areas, improving airflow regulation and quality control.

Description

Technical Field

[0001] This application relates to the field of equipment for glass fiber reinforced polyester spunbond fabric, and in particular to a web forming suction system for a glass fiber reinforced polyester spunbond production line. Background Technology

[0002] In the current continuous production process of polyester spunbond nonwoven materials, the fiber laying device (or laying machine) is used to ensure uniform fiber distribution and form a fiber web with a predetermined structure. This device is equipped with a negative pressure suction system. By configuring one or more high-power centrifugal negative pressure fans as the core power source, these fans apply a continuous, downward-directed negative pressure suction force to the area below the laying machine that carries and transports the continuously running fiber web curtain (or belt) through a common main suction duct (or main air duct) with relatively fixed cross-sectional dimensions.

[0003] By utilizing the generated stable airflow field, the falling trajectory and final landing point of the molten polyester filament bundle (or short fiber stream) thrown at high speed by the filament oscillator are precisely controlled. The strong downward adsorption force can effectively overcome factors such as environmental airflow interference and the static electricity of the fibers themselves, causing the fiber bundle to settle rapidly and vertically and be orderly laid on the surface of the web curtain, thereby forming an initial loose fiber web structure with a certain cohesion.

[0004] Regarding the aforementioned technologies, the inventors believe that when production processes shift to specific high-performance fields, such as the production of glass fiber reinforced polyester matrix fabrics, the functional requirements for the suction system become more complex and refined. Typically, two independent negative pressure suction zones with different functional focuses need to be set up in the critical operating area of ​​the web-laying machine. In this actual operating scenario requiring dual-zone suction, due to the indivisible physical structure of a single air duct, the system cannot independently, accurately, and quickly dynamically adjust the actual airflow to the two different functional zones. Competition and mutual interference in airflow distribution inevitably exist between the two zones, making it difficult to achieve optimal airflow parameter configuration according to their respective process requirements. This imbalance in airflow distribution and lack of controllability restricts the precise control of fiber (especially glass fiber) web-laying behavior, thereby affecting the uniformity of glass fiber distribution in the matrix, the bonding state with the polyester matrix, and the key quality indicators of the final composite material's physical and mechanical properties. Utility Model Content

[0005] In order to achieve independent air suction for two areas and improve the regulation of air volume and quality control, this application provides a fiberglass reinforced polyester spunbond production line web-forming air suction system.

[0006] This application provides a fiberglass-reinforced polyester spunbond production line web forming suction system, which adopts the following technical solution:

[0007] A fiberglass reinforced polyester spunbond production line web forming suction system includes a suction chamber, a suction component communicating with the interior of the suction chamber, a first suction fan and a second suction fan communicating with the interior of the suction chamber respectively, and an air supply component provided at the air outlet of the first suction fan and the second suction fan, the air supply component being opposite to the suction component.

[0008] Optionally, the suction chamber is provided with a suction duct, the inlet end of the suction duct is opposite to the suction assembly, and the outlet end of the suction duct is opposite to the air inlets of the first suction fan and the second suction fan, respectively.

[0009] Optionally, the suction assembly includes an inclined mesh suction section and a flat mesh suction section. The inclined mesh suction section is inclined toward one side of the air supply assembly, the top of the flat mesh suction section is horizontal, and the bottom of the inclined mesh suction section is connected to the suction duct. The bottom of the flat mesh suction section is also connected to the suction duct.

[0010] Optionally, the suction duct includes an inclined mesh suction pipe opposite to the inclined mesh suction section, the other end of the inclined mesh suction pipe being connected to the first suction fan, and a flat mesh suction pipe being connected below the flat mesh suction section, the other end of the flat mesh suction pipe being connected to the second suction fan.

[0011] Optionally, the air inlets of the first and second suction fans are equipped with switching boxes, the suction pipes are connected to the switching boxes, a first regulating valve for opening and closing is provided between the inclined mesh suction pipe and the switching box, a second regulating valve for opening and closing is provided between the flat mesh suction pipe and the switching box, and a third regulating valve is provided inside the switching box relative to the inclined mesh suction pipe and the flat mesh suction pipe. The third regulating valve divides the interior of the switching box into a first section communicating with the inclined mesh suction section and a second section communicating with the flat mesh suction section. The third regulating valve is used to control the connection between the first section and the second section.

[0012] Optionally, the air inlet of the first suction fan is connected to the first section, and the air inlet of the second suction fan is connected to the second section.

[0013] Optionally, the air supply component includes a horizontal air supply section, a vertical air supply section, and an inclined air supply section. The air outlet direction of the horizontal air supply section is horizontally toward the air intake component, the air outlet direction of the vertical air supply section is vertically toward the air intake component, and the air outlet direction of the inclined air supply section is inclined toward the air intake component. The inclined direction gradually moves toward one side of the air intake component along the vertical direction from top to bottom.

[0014] Optionally, the air supply assembly includes a main air supply duct, the horizontal air supply section includes a horizontal air supply duct connected to the main air supply duct, and the end of the horizontal air supply duct is provided with a horizontal air outlet, the vertical air supply section includes a vertical air supply duct connected to the main air supply duct, and the end of the vertical air supply duct is provided with a vertical air outlet, and the inclined air supply section includes an inclined air supply duct connected to the main air supply duct, and the end of the inclined air supply duct is provided with an inclined air outlet.

[0015] Optionally, a mixing box is provided between the main air supply duct and the first and second suction fans. One end of the mixing box is connected to the main air supply duct, and the other end of the mixing box is connected to the first and second suction fans.

[0016] Optionally, an exhaust pipe is provided on one side of the mixing box, and the side of the exhaust pipe facing away from the mixing box is connected to the outside.

[0017] In summary, this application includes at least one of the following beneficial technical effects:

[0018] 1. The gas inside the switching box is extracted by the first and second suction fans. The switching box then draws air from the gas inside the suction assembly through the suction pipe. The first and second suction fans blow the extracted gas out through the air supply assembly to replenish the air on the surface of the suction assembly, thereby achieving overall circulation.

[0019] 2. The internal components of the switching box are switched by the first, second, and third regulating valves located inside the switching box, so that the inclined screen suction section and the horizontal screen suction section can be controlled to draw air independently. When the air volume is adjusted, they do not affect each other, and the fans can be stopped independently, saving energy. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a fiberglass-reinforced polyester spunbond production line web forming and suction system according to an embodiment of this application.

[0021] Figure 2 This is a schematic diagram of the internal structure of the switching box of the web forming and suction system of a glass fiber reinforced polyester spunbond production line according to an embodiment of this application.

[0022] Explanation of reference numerals in the attached drawings: 1. Suction chamber; 11. First suction fan; 12. Second suction fan; 13. Suction duct; 131. Inclined mesh suction duct; 132. Horizontal mesh suction duct; 2. Suction assembly; 21. Inclined mesh suction section; 22. Horizontal mesh suction section; 23. Switching box; 231. First regulating valve; 232. Second regulating valve; 233. Third regulating valve; 3. Make-up air assembly; 31. Mixing box; 32. Main make-up air duct; 33. Horizontal make-up air section; 34. Vertical make-up air section; 35. Inclined make-up air section; 36. Exhaust duct. Detailed Implementation

[0023] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0024] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0025] In the current continuous production process of polyester spunbond nonwoven materials, the fiber laying device (or laying machine) is used to ensure uniform fiber distribution and form a fiber web with a predetermined structure. This device is equipped with a negative pressure suction system. By configuring one or more high-power centrifugal negative pressure fans as the core power source, these fans apply a continuous, downward-directed negative pressure suction force to the area below the laying machine that carries and transports the continuously running fiber web curtain (or belt) through a common main suction duct (or main air duct) with relatively fixed cross-sectional dimensions.

[0026] By utilizing the generated stable airflow field, the falling trajectory and final landing point of the molten polyester filament bundle (or short fiber stream) thrown at high speed by the filament oscillator are precisely controlled. The strong downward adsorption force can effectively overcome factors such as environmental airflow interference and the static electricity of the fibers themselves, causing the fiber bundle to settle rapidly and vertically and be orderly laid on the surface of the web curtain, thereby forming an initial loose fiber web structure with a certain cohesion.

[0027] Regarding the aforementioned technologies, the inventors believe that when production processes shift to specific high-performance fields, such as the production of glass fiber reinforced polyester matrix fabrics, the functional requirements for the suction system become more complex and refined. Typically, two independent negative pressure suction zones with different functional focuses need to be set up in the critical operating area of ​​the web-laying machine. In this actual operating scenario requiring dual-zone suction, due to the indivisible physical structure of a single air duct, the system cannot independently, accurately, and quickly dynamically adjust the actual airflow to the two different functional zones. Competition and mutual interference in airflow distribution inevitably exist between the two zones, making it difficult to achieve optimal airflow parameter configuration according to their respective process requirements. This imbalance in airflow distribution and lack of controllability restricts the precise control of fiber (especially glass fiber) web-laying behavior, thereby affecting the uniformity of glass fiber distribution in the matrix, the bonding state with the polyester matrix, and the key quality indicators of the final composite material's physical and mechanical properties.

[0028] In order to achieve independent air suction for two areas and improve the regulation of air volume and quality control, this application provides a fiberglass reinforced polyester spunbond production line web-forming air suction system.

[0029] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0030] This application discloses a web-forming suction system for a glass fiber reinforced polyester spunbond production line. (Refer to...) Figure 1 A fiberglass reinforced polyester spunbond production line web forming suction system includes a suction chamber 1, which is a closed structure. An air inlet is provided on the side wall of the suction chamber 1, and the air inlet connects the interior of the suction chamber 1 with the outside. An air outlet is also provided on the other side of the suction chamber 1, and the air outlet connects the interior of the suction chamber 1 with the outside.

[0031] A suction assembly 2 is installed on one side of the air inlet of the suction chamber 1, which is used to hold the net-laying machine. A first suction fan 11 and a second suction fan 12 are installed on one side of the air outlet of the suction chamber 1. The air inlet of the first suction fan 11 is opposite to the air outlet of the suction chamber 1, and the air inlet of the second suction fan 12 is opposite to the air outlet of the suction chamber 1. The first suction fan 11 and the second suction fan 12 draw out the gas inside the suction chamber 1, and then the gas enters the suction chamber 1 from the suction assembly 2 to replenish the air, thereby achieving circulation.

[0032] The first suction fan 11 and the second suction fan 12 are provided with a supplementary air assembly 3 on the side of the air outlet near the suction assembly 2. The supplementary air assembly 3 is used to supplement the air at the location of the suction assembly 2, thereby realizing the circulation of the whole system.

[0033] The suction assembly 2 includes an inclined mesh suction section 21 and a flat mesh suction section 22. The inclined mesh suction section 21 is located on the side of the flat mesh suction section 22 closer to the air supply assembly 3. The side wall of the inclined mesh suction section 21 is inclined, and the inclination direction gradually slopes towards the side closer to the air supply assembly 3 from top to bottom. This allows the air supply to enter the suction assembly 2 from the inclined surface of the inclined mesh section, and then enter the suction chamber 1 from the bottom end of the inclined mesh suction section 21. The top end of the flat mesh suction section 22 is a flat structure, allowing the air supply to enter the suction assembly 2 from the top end of the flat mesh suction section 22, and then enter the suction chamber 1 from the bottom end of the flat mesh suction section 22.

[0034] An air suction duct 13 is also provided inside the air suction chamber 1. The air suction duct 13 is used to separate the gas inside the inclined mesh air suction section 21 from the gas inside the flat mesh air suction section 22, so that the gas in different sections can be controlled separately.

[0035] The suction duct 13 includes an inclined mesh suction pipe 131 opposite to the inclined mesh suction section 21. One end of the inclined mesh suction pipe 131 is opposite to the bottom end of the inclined mesh suction section 21, and the inclined mesh suction pipe 131 is fixedly connected to the suction chamber 1. A flat mesh suction pipe 132 is also provided below the flat mesh suction section 22, and the side wall of the flat mesh suction pipe 132 is fixedly connected to the suction chamber 1.

[0036] A switching box 23 is provided at the air inlet end of the first suction fan 11 and the second suction fan 12. The switching box 23 is a rectangular box, and its side walls are respectively connected and fixedly connected to the inclined mesh suction pipe 131 and the flat mesh suction pipe 132. A first regulating valve 231 is provided on the side wall of the switching box 23 at the position relative to the inclined mesh suction pipe 131, and a second regulating valve 232 is provided on the side wall of the switching box 23 at the position relative to the flat mesh suction pipe 132. The first regulating valve 231 is used to control the gas located inside the inclined mesh suction pipe 131 to enter the interior of the switching box 23, and the second regulating valve 232 is used to control the gas located inside the flat mesh suction pipe 132 to enter the interior of the switching box 23. In a specific embodiment, the first regulating valve 231 and the second regulating valve are multi-leaf regulating valves.

[0037] The switching box 23 is internally equipped with a third regulating valve 233, which divides the interior of the switching box 23 into a first section communicating with the inclined mesh suction pipe 131 and a second section communicating with the flat mesh suction pipe 132. The first section is opposite to the first suction fan 11, and the second section is opposite to the second suction fan 12. The third regulating valve 233 is used to control the connection between the first section and the second section. In a specific embodiment, the third regulating valve 233 is a multi-leaf regulating valve.

[0038] The air supply assembly 3 includes a mixing box 31, which is a box structure. One end of the mixing box 31 is fixedly connected to and relatively connected to the air outlets of the first suction fan 11 and the second suction fan 12. The other end of the mixing box 31 is provided with a main air supply pipe 32, which is fixedly connected to and relatively connected to the mixing box 31.

[0039] The main air supply duct 32, on the side facing away from the mixing chamber 31, is provided with a horizontal air supply section 33, a vertical air supply section 34, and an inclined air supply section 35. The horizontal air supply section 33 is located on the side of the inclined mesh suction section 21 closest to the mixing chamber 31. The inclined air supply section 35 is located above the horizontal air supply section 33 and is inclined towards the side of the inclined mesh air supply section. The vertical air supply section 34 is located above the horizontal mesh air supply section.

[0040] The horizontal air supply unit 33 includes a horizontal air supply pipe, which is fixedly connected to and relatively connected to the main air supply pipe 32. A horizontal air outlet is provided at the end of the horizontal air supply pipe away from the main air supply pipe 32. The horizontal air outlet is horizontally opened and is opposite to the inclined mesh air intake.

[0041] The vertical air supply section 34 includes a vertical air supply pipe, which is fixedly connected to and relatively connected to the main air supply pipe 32. A vertical air outlet is provided at one end of the vertical air supply pipe away from the main air supply pipe 32. The vertical air outlet is vertically opened and is opposite to the flat mesh air intake.

[0042] The inclined air supply section 35 includes an inclined air supply pipe, which is fixedly connected to and relatively connected to the main air supply pipe 32. An inclined air outlet is provided at one end of the inclined air supply pipe away from the main air supply pipe 32, and the inclined air outlet is opposite to the inclined mesh air intake.

[0043] The gas inside the switching box 23 is extracted by the first suction fan 11 and the second suction fan 12. Then, the switching box 23 draws the gas inside the suction assembly 2 through the suction pipe 13. The first suction fan 11 and the second suction fan 12 blow the extracted gas out through the air replenishment assembly 3 to replenish the air on the surface of the suction assembly 2, thereby achieving overall circulation.

[0044] The internal components of the switching box 23 are switched by the first regulating valve 231, the second regulating valve 232 and the third regulating valve 233 located inside the switching box 23, so that the inclined screen suction section 21 and the flat screen suction section 22 can be controlled to suck air separately.

[0045] An exhaust pipe 36 is also provided on the side wall of the mixing box 31. One end of the exhaust pipe 36 is fixedly connected to the mixing box 31 and the interior is relatively connected. The other end of the exhaust pipe 36 is used to discharge excess gas inside the mixing box 31 to the outside.

[0046] In this application, the term "multiple" refers to at least two or more, unless otherwise expressly defined. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0047] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A glass fiber reinforced polyester spunbond production line webbing air suction system characterized by: It includes a suction chamber (1), on which a suction assembly (2) communicating with the interior of the suction chamber (1) is provided. A first suction fan (11) and a second suction fan (12) communicating with the interior of the suction chamber (1) are respectively provided on the suction chamber (1). The air outlets of the first suction fan (11) and the second suction fan (12) are provided with a supplementary air assembly (3), which is opposite to the suction assembly (2).

2. The fiberglass-reinforced polyester spunbond production line web- forming air suction system according to claim 1, characterized in that: The suction chamber (1) is provided with a suction pipe (13). The inlet end of the suction pipe (13) is opposite to the suction assembly (2), and the outlet end of the suction pipe (13) is opposite to the air inlets of the first suction fan (11) and the second suction fan (12), respectively.

3. The fiberglass-reinforced polyester spunbond production line web- forming air suction system according to claim 2, characterized in that: The suction assembly (2) includes an inclined mesh suction section (21) and a flat mesh suction section (22). The inclined mesh suction section (21) is inclined toward one side of the air supply assembly (3). The top of the flat mesh suction section (22) is horizontal. The bottom of the inclined mesh suction section (21) is connected to the suction pipe (13). The bottom of the flat mesh suction section (22) is connected to the suction pipe (13).

4. The fiberglass-reinforced polyester spunbond production line web- forming air suction system according to claim 3, characterized in that: The suction pipe (13) includes an inclined mesh suction pipe (131) opposite to the inclined mesh suction section (21). The other end of the inclined mesh suction pipe (131) is connected to the first suction fan (11). A flat mesh suction pipe (132) is connected below the flat mesh suction section (22). The other end of the flat mesh suction pipe (132) is connected to the second suction fan (12).

5. The fiberglass-reinforced polyester spunbond production line web- forming air suction system according to claim 4, characterized in that: A switching box (23) is provided at the air inlet of the first suction fan (11) and the second suction fan (12). The suction pipe (13) is connected to the switching box (23). A first regulating valve (231) for opening and closing is provided between the inclined mesh suction pipe (131) and the switching box (23). A second regulating valve (232) for opening and closing is provided between the flat mesh suction pipe (132) and the switching box (23). A third regulating valve (233) is provided inside the switching box (23) between the inclined mesh suction pipe (131) and the flat mesh suction pipe (132). The third regulating valve (233) divides the interior of the switching box (23) into a first part that communicates with the inclined mesh suction part (21) and a second part that communicates with the flat mesh suction part (22). The third regulating valve (233) is used to control the connection between the first part and the second part.

6. The fiberglass-reinforced polyester spunbond production line web- forming air suction system according to claim 5, characterized in that: The air inlet of the first suction fan (11) is connected to the first section, and the air inlet of the second suction fan (12) is connected to the second section.

7. The fiberglass-reinforced polyester spunbond production line web- forming air suction system according to claim 1, characterized in that: The air supply component (3) includes a horizontal air supply section (33), a vertical air supply section (34), and an inclined air supply section (35). The air outlet direction of the horizontal air supply section (33) is horizontally oriented towards the air intake component (2). The air outlet direction of the vertical air supply section (34) is vertically oriented towards the air intake component (2). The air outlet direction of the inclined air supply section (35) is inclined towards the air intake component (2), and the inclined direction gradually moves towards one side of the air intake component (2) along the height direction from top to bottom.

8. The fiberglass-reinforced polyester spunbond production line web- forming air suction system according to claim 7, characterized in that: The air supply assembly (3) includes a main air supply pipe (32), the horizontal air supply section (33) includes a horizontal air supply pipe, the horizontal air supply pipe is connected to the main air supply pipe (32), and the end of the horizontal air supply pipe is provided with a horizontal air outlet, the vertical air supply section (34) includes a vertical air supply pipe, the vertical air supply pipe is connected to the main air supply pipe (32), and the end of the vertical air supply pipe is provided with a vertical air outlet, the inclined air supply section (35) includes an inclined air supply pipe, the inclined air supply pipe is connected to the main air supply pipe (32), and the end of the inclined air supply pipe is provided with an inclined air outlet.

9. The fiberglass-reinforced polyester spunbond production line web- forming air suction system according to claim 8, characterized in that: A mixing box (31) is provided between the main air supply pipe (32) and the first suction fan (11) and the second suction fan (12). One end of the mixing box (31) is connected to the main air supply pipe (32), and the other end of the mixing box (31) is connected to the first suction fan (11) and the second suction fan (12).

10. The fiberglass-reinforced polyester spunbond production line web- forming air suction system according to claim 9, characterized in that: An exhaust pipe (36) is provided on one side of the mixing box (31), and the exhaust pipe (36) is connected to the outside on the side away from the mixing box (31).

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