Drying device for carpet gluing and technological process thereof

Abstract

The invention relates to the technical field of carpet production equipment, and discloses a drying device for carpet gluing and a technological process thereof.The drying device comprises a conveying mechanism for conveying glued carpet surface fabric, a preheating unit and a drying unit are arranged on the conveying mechanism, and the drying unit is located at the downstream of the preheating unit; the drying unit comprises a drying box body, a hot air assembly arranged in the drying box body and a waste gas emission pipeline connected with the drying box body, and the hot air assembly is used for blowing heat and drying the carpet surface fabric; the preheating unit comprises a preheating box body, an extrusion assembly located in the preheating box body and used for extruding and dewatering the carpet surface fabric and a heating assembly used for heating the carpet surface fabric subjected to extrusion and dewatering, the heating assembly comprises a heat exchanger and an exhaust fan, and an air supply pipeline is connected between the waste gas exhaust pipeline and the preheating box body; the heat exchanger is connected between the air supply pipeline and the waste gas discharge pipeline, and the exhaust fan is arranged on the air supply pipeline. The gluing and drying device has the effect of improving the gluing and drying quality and efficiency.

Description

Technical Field

[0001] This application relates to the technical field of carpet production equipment, and particularly to a drying device for carpet gluing and its technological process. Background Art

[0002] As an important part of the textile industry, the drying process after carpet gluing plays a crucial role in improving product performance. Through a reasonable gluing process, the wear resistance, anti-slip property, and bonding strength with the base layer of the carpet can be enhanced, while the drying process directly affects the curing effect of the glue, thereby affecting the overall quality of the carpet. With the continuous improvement of market requirements for carpet performance and the continuous optimization of production processes, the gluing and drying technology is also evolving continuously and has become an important link in determining product quality.

[0003] In the prior art, to solve the drying problem after carpet gluing, hot air circulation or infrared radiation and other means are usually adopted. Hot air circulation drying mainly relies on the circulating flow of high-temperature air to achieve heat transfer, and the heated air is blown onto the carpet surface by a blower to accelerate the drying of the glue; infrared radiation heating uses the infrared rays emitted by the radiation plate to directly act on the carpet surface and quickly transfer heat.

[0004] However, the above-mentioned traditional drying means generally have problems of high energy consumption and unstable drying effect. Among them, hot air circulation drying requires maintaining a high-temperature environment for a long time, resulting in a large amount of energy waste. Especially in the current situation of continuously rising energy prices, it significantly increases the production cost. And the open heating structure of infrared radiation heating has a heat loss rate of 30%-40%, and the radiation coverage is uneven and the penetration depth is insufficient, resulting in an unstable drying effect and affecting the quality of the final product. Summary of the Invention

[0005] In order to improve the quality and efficiency of gluing and drying, this application provides a drying device for carpet gluing and its technological process.

[0006] The drying device for carpet gluing and its technological process provided by this application adopt the following technical solutions: A drying device for carpet gluing, comprising a conveying mechanism for conveying the carpet fabric after gluing. A preheating unit and a drying unit are provided on the conveying mechanism. The drying unit is located downstream of the preheating unit. The drying unit includes a drying box body, a hot air assembly arranged in the drying box body, and an exhaust gas discharge pipe connected to the drying box body. The hot air assembly is used to blow hot air to dry the carpet fabric. The preheating unit includes a preheating box body, an extrusion assembly located in the preheating box body for extruding and removing water from the carpet fabric, and a heating assembly for heating the carpet fabric after extrusion and water removal. The heating assembly includes a heat exchanger and a suction fan. A air supply pipe is connected between the exhaust gas discharge pipe and the preheating box body. The heat exchanger is connected between the air supply pipe and the exhaust gas discharge pipe. The suction fan is arranged on the air supply pipe and is used to convey the air heated by the heat exchanger into the preheating box body.

[0007] By adopting the above technical solutions, the carpet fabric after gluing is first fed into the preheating unit by the conveying mechanism and then enters the drying unit. After entering the preheating unit, the extrusion assembly is used to remove water from the carpet fabric to remove excess moisture. Then, through the coordinated action of the heat exchanger and the suction fan in the heating assembly, the heat energy recovered in the drying unit is converted into hot air to preheat the carpet fabric after extrusion and water removal. Finally, the carpet fabric enters the drying unit, and the hot air assembly blows hot air to the carpet fabric to complete the drying process. During the whole process, the heat energy is recycled, significantly reducing energy consumption, while improving the drying efficiency and quality stability, thus effectively enhancing the overall performance of carpet production.

[0008] Optionally, the extrusion assembly includes an upper extrusion roller and a lower extrusion roller that are rotatably arranged. The upper extrusion roller and the lower extrusion roller are arranged oppositely, and the gap between the upper extrusion roller and the lower extrusion roller is adjustable. The carpet fabric passes through the gap between the upper extrusion roller and the lower extrusion roller. The inner bottom wall of the preheating box body is inclined towards a corner of its own bottom. A drain pipe is arranged on the outer side wall of the preheating box body, and the drain pipe communicates with the lowest part of the inner bottom wall of the preheating box body.

[0009] By adopting the above technical solutions, after the carpet fabric after gluing enters the preheating unit, it first passes through the gap between the upper extrusion roller and the lower extrusion roller. Through the relative rotation of the rollers and the design of the adjustable gap, the unfixed glue layer can be rolled evenly and excess moisture on the surface of the carpet fabric can be effectively extruded. At the same time, the inner bottom wall of the preheating box body is designed to be an inclined structure, so that the extruded water can be smoothly collected at the lowest part and discharged through the drain pipe, avoiding the accumulation of water in the box body. It not only improves the water removal efficiency, but also ensures a dry environment inside the preheating box body, thus providing good conditions for the subsequent heating process and further enhancing the drying effect and energy utilization efficiency.

[0010] Optionally, a flow distribution plate is provided on the inner top wall of the preheating box body. The interior of the flow distribution plate is a cavity structure. Its top is connected to the air supply duct, and a number of air outlet holes are provided at the bottom to uniformly blow hot air onto the carpet fabric.

[0011] By adopting the above technical solution, after the hot air enters the flow distribution plate through the air supply duct, it is uniformly blown onto the glue coating layer on the surface of the carpet fabric through the air outlet holes, realizing uniform heating of the carpet fabric. This design not only improves the thermal energy utilization efficiency but also enhances the uniformity of heat reception of the carpet fabric, thereby improving the drying quality and reducing energy consumption.

[0012] Optionally, one flow distribution plate is provided on the inner top wall of the drying box body. The air outlet holes at the bottom are arranged towards the carpet fabric. The hot air assembly includes a heating element and a blower. The heating element is arranged inside the flow distribution plate, and the blower is arranged on the top of the drying box body, connecting the outside of the drying box body with the inner cavity of the flow distribution plate.

[0013] By adopting the above technical solution, after the carpet fabric enters the drying unit, first, the blower introduces and conveys external air into the inside of the flow distribution plate. Subsequently, the heating element heats the air inside the flow distribution plate to form hot air. The hot air is uniformly blown onto the surface of the carpet fabric through the air outlet holes at the bottom of the flow distribution plate. By using the method of directly contacting the hot air with the carpet fabric, the heat utilization rate is significantly improved. At the same time, the cavity structure of the flow distribution plate ensures the uniformity of hot air distribution, avoiding problems such as local overheating or uneven drying, thereby improving the drying efficiency and quality.

[0014] Optionally, the preheating unit further includes a plurality of transition box bodies connected between the preheating box body and the drying box body. One flow distribution plate is provided on the inner top wall of each transition box body. A shunt pipe is connected between the air supply duct and the preheating box body. A plurality of opening and closing plates are arranged along the axial direction of the shunt pipe. A shunt chamber is formed between adjacent two opening and closing plates. Each shunt chamber is connected to the flow distribution plate inside the corresponding transition box body through an air supply branch pipe, and the opening and closing angle of each opening and closing plate can be adjusted.

[0015] By adopting the above technical solution, after the carpet fabric is preliminarily heated in the preheating box body, it successively passes through a plurality of transition box bodies and finally enters the drying unit to complete the drying process. Inside the transition box body, the hot air is conveyed to the shunt pipe through the air supply duct. After the opening and closing degree of the opening and closing plates in the shunt pipe is adjusted, a plurality of shunt chambers are formed. Each shunt chamber accurately conveys the hot air to the flow distribution plate inside the corresponding transition box body through the air supply branch pipe. The hot air uniformly blown out by the flow distribution plate can gradually raise the temperature of the carpet fabric, enabling the carpet fabric to reach an appropriate temperature state before entering the drying unit. This design not only improves the thermal energy utilization efficiency but also effectively reduces the damage caused by sudden temperature changes to the carpet fabric, thereby enhancing the overall quality of glue coating drying.

[0016] Optionally, each opening and closing plate includes a coaxially arranged fixed half plate and an adjusting half plate, the fixed half plate being coaxially fixed on the inner wall of the diverter tube, a gear ring segment being sleeved on the outer ring of the adjusting half plate, an adjusting gear being rotatably arranged on the inner wall of the diverter tube and rotatably engaged with the gear ring segment, a rotating shaft of the adjusting gear passing through the diverter tube and being connected to a driving member, when the driving member drives the adjusting gear to rotate, the rotation of the adjusting gear drives the gear ring segment to rotate around its own axis to adjust the opening of the opening and closing plate.

[0017] By employing this technical solution, a driver drives the adjustment gear, which in turn rotates the ring gear segment about its own axis, thereby adjusting the opening of the adjustment half plate relative to the fixed half plate. Precisely controlling the opening of the opening plate allows for flexible airflow distribution within the air supply branch pipes, enabling hot air to be distributed as needed across multiple transition boxes. This ensures that different areas of the carpet surface receive an even and appropriate amount of hot air, improving drying efficiency and quality.

[0018] Optionally, the driving member includes a driving gear and a brake motor. The driving gear corresponds one-to-one to the adjusting gear and is sleeved on the end of the diverter pipe where the adjusting gear rotates and passes through. Two adjacent driving gears are meshed with each other, and the radius of multiple driving gears distributed vertically increases from top to bottom. The brake motor is coaxially connected to one of the driving gears.

[0019] By adopting the above technical solution, the brake motor first drives the coaxially connected drive gear to rotate. Due to the meshing arrangement between adjacent drive gears, all drive gears are driven to rotate synchronously. The rotation of the drive gear further drives the adjustment gear to rotate. The adjustment gear meshes with the gear ring segment on the outer ring of the adjustment half plate, causing the adjustment half plate to rotate axially relative to the fixed half plate, thereby adjusting the opening of the opening and closing plate. The multiple drive gears are designed with increasing radius from top to bottom, allowing a single drive source to accurately control the opening of each opening and closing plate, thereby achieving a gradually decreasing air volume distribution closer to the preheating unit, creating an effect of increasing heat along the conveying direction. Not only can the carpet surface fabric be heated more evenly, significantly improving drying efficiency and quality, but it also effectively reduces energy waste.

[0020] Optionally, a waste gas treatment box filled with treatment liquid is provided on one side of the drying box body, the outlet end of the waste gas exhaust pipe passes through the waste gas treatment box and is inserted into the treatment liquid, and an air outlet is opened on the top of the waste gas treatment box, and an activated carbon purification plate is provided at the air outlet.

[0021] By adopting the above technical solution, the waste gas generated during the drying process of the carpet fabric is first guided through the waste gas discharge pipeline into the waste gas treatment tank filled with the treatment liquid. The waste gas penetrates into the treatment liquid for preliminary purification, and then is discharged from the air outlet at the top of the waste gas treatment tank. Through the adsorption of the activated carbon purification plate, the residual harmful substances are further removed, and finally the up-to-standard discharge of the waste gas is achieved. It effectively reduces the waste gas pollution during the drying process, reduces the impact on the environment, and at the same time improves the waste gas treatment efficiency through multi-stage purification means, enhancing the environmental protection and safety of the production process.

[0022] A drying process flow for carpet gluing includes the following steps: S1. Pre-coating and preheating stage: The carpet fabric is traction-transported by the conveying mechanism into the preheating unit, and the carpet fabric is squeezed to remove water and preheated by the squeezing component and the heating component. S2. Pre-coating drying stage: The carpet fabric is traction-transported by the conveying mechanism away from the preheating unit and then enters the drying unit for drying. After drying, the semi-finished carpet is output from the drying unit. S3. Bottom-repairing preheating stage: The glued surface of the semi-finished carpet after bottom-repairing gluing is facing up, and it is traction-transported again by the conveying mechanism into the preheating unit. The carpet fabric is squeezed to remove water and preheated by the squeezing component and the heating component. S4. Bottom-repairing drying stage: The semi-finished carpet after bottom-repairing gluing is traction-transported by the conveying mechanism away from the preheating unit and then enters the drying unit again for drying. After drying, the finished carpet is output from the drying unit, completing the bottom-repairing process.

[0023] By adopting the above technical solution, the two coatings on the carpet fabric are dried. The pre-coating plays a role in shaping the carpet surface and preventing frayed edges. The bottom-repairing is used for plasticity according to different carpet surface materials, carpet weights, and different carpet sizes, ensuring that the latex is more evenly distributed on the carpet surface, enhancing the bonding strength and durability of the carpet. At the same time, the squeezing to remove water and the heating treatment in the preheating unit effectively reduce the water content of the carpet fabric, reduce the energy consumption during the drying process, and improve the energy utilization rate.

[0024] Optionally, in the pre-coating drying stage and the bottom-repairing drying stage, the heat energy in the drying unit is recovered by the heat exchanger and the exhaust fan and transported to the preheating unit for heating.

[0025] By adopting the above technical solution, the waste heat in the drying unit is fully recovered by the heat exchanger and accurately transported to the preheating unit by the exhaust fan, providing stable heat source support for the preheating process of the carpet fabric. This design not only reduces the need for additional energy input, but also ensures the improvement of the uniformity and stability of the preheating process, thus creating more ideal conditions for the subsequent drying process and further enhancing the overall production efficiency and product quality.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. The carpet fabric after gluing is first fed into the preheating unit by the conveying mechanism and then enters the drying unit. After entering the preheating unit, the water treatment of the carpet fabric is carried out by the extrusion assembly to remove excess water. Then, through the synergistic action of the heat exchanger and the exhaust fan in the heating assembly, the recovered heat energy in the drying unit is converted into hot air to preheat the carpet fabric after extrusion and water removal. Finally, the carpet fabric enters the drying unit, and the hot air assembly blows hot air to the carpet fabric to complete the drying process. During the whole process, the heat energy is recycled, significantly reducing the energy consumption, while improving the drying efficiency and quality stability, thus effectively enhancing the overall performance of carpet production; 2. After the carpet fabric after gluing enters the preheating unit, it first passes through the gap between the upper extrusion roller and the lower extrusion roller. Through the relative rotation of the rollers and the design of the adjustable gap, the unfixed glue layer can be rolled evenly and the excess water on the surface of the carpet fabric can be effectively extruded. At the same time, the inner bottom wall of the preheating box is designed as an inclined structure, so that the extruded water can be smoothly collected at the lowest point and discharged through the drain pipe, avoiding the accumulation of water in the box. It not only improves the water removal efficiency but also ensures the dry environment inside the preheating box, thus providing good conditions for the subsequent heating process and further enhancing the drying effect and energy utilization efficiency; 3. After the hot air enters the air distribution plate through the air supply pipe, it is evenly blown to the glue layer on the surface of the carpet fabric through the air outlet holes, realizing the uniform heating of the carpet fabric. This design not only improves the heat energy utilization efficiency but also improves the uniformity of the carpet fabric being heated, thus enhancing the drying quality and reducing the energy consumption. Description of the Drawings

[0027] Figure 1 is the overall structural schematic diagram of the embodiment of the present application.

[0028] Figure 2 is the overall structural sectional view of the embodiment of the present application.

[0029] Figure 3 is the sectional view showing the connection relationship between the slider and the screw rod in the preheating box in the embodiment of the present application.

[0030] Figure 4 is the sectional view showing the connection relationship between the heat exchanger, the air supply pipe and the waste gas discharge pipe in the embodiment of the present application.

[0031] Figure 5 is the sectional view showing the internal structure of the shunt pipe in the embodiment of the present application.

[0032] Figure 6 is the schematic diagram showing the connection relationship between the fixed half plate, the adjustment half plate, the adjustment gear and the drive gear in the embodiment of the present application.

[0033] Figure 7 It is a sectional view showing the internal structure of the waste gas treatment box in the embodiment of the present application.

[0034] Overall structure sectional view.

[0035] Explanation of reference numerals: 1. Conveyor mechanism; 11. Frame; 12. Transmission shaft; 13. Reduction motor; 2. Preheating unit; 21. Preheating box; 211. Slide groove; 2111. Screw; 2112. Driven bevel gear; 212. Driving bevel gear; 2121. Servo motor; 213. Drain pipe; 22. Extrusion assembly; 221. Upper extrusion roller; 2211. Slide block; 222. Lower extrusion roller; 23. Heating assembly; 231. Heat exchanger; 2311. Heat exchanger housing; 2312. Heat exchange coil; 232. Exhaust fan; 24. Transition box; 3. Drying unit; 31. Drying box; 311. Temperature sensor; 312. Central control screen; 32. Hot air assembly; 321. Heating element; 322. Blower; 33. Waste gas discharge pipe; 4. Air supply pipe; 5. Diverging pipe; 6. Air supply branch pipe; 7. Opening and closing plate; 71. Fixed half plate; 72. Adjusting half plate; 721. Groove; 722. Tooth ring section; 7221. Adjusting gear; 73. Driving member; 731. Driving gear; 732. Holding brake motor; 8. Flow distribution plate; 81. Air outlet hole; 9. Waste gas treatment box; 91. Air outlet; 911. Activated carbon purification plate. Detailed implementation manners

[0036] The following further Figures 1-7 describes the present application in detail with reference to the

[0037] The embodiment of the present application discloses a drying device for carpet gluing and its technological process.

[0038] Referring to Figure 1 and Figure 2 , a drying device for carpet gluing includes a conveyor mechanism 1, a preheating unit 2 and a drying unit 3. Among them, the preheating unit 2 is located on the conveyor mechanism 1, and the drying unit 3 is located downstream of the preheating unit 2. The preheating unit 2 includes a preheating box 21, an extrusion assembly 22, a heating assembly 23 and a plurality of transition boxes 24. In this embodiment, two transition boxes 24 are taken as an example. The two transition boxes 24 are fixed between the preheating box 21 and the drying box 31 along the conveying direction of the carpet fabric. The drying unit 3 includes a drying box 31, a hot air assembly 32 and a waste gas discharge pipe 33. The heating assembly 23 includes a heat exchanger 231 and an exhaust fan 232. A air supply pipe 4 is connected between the waste gas discharge pipe 33 and the preheating box 21. A diverging pipe 5 is connected between the air supply pipe 4 and the preheating box 21. One air supply branch pipe 6 is connected to each transition box 24 along the conveying direction on the diverging pipe 5.

[0039] Reference Figure 1 and Figure 2 The glued carpet fabric is first fed into the preheating unit 2 via the conveyor mechanism 1 and into the preheating box 21. The extrusion assembly 22 dehydrates the carpet fabric, removing excess moisture. The heating assembly 23 then converts the heat energy recovered in the drying unit 3 into hot air, which is then distributed through the diversion pipe 5 and the air supply branch pipe 6 to the preheating box 21 and the two transition boxes 24. This gradually preheats the carpet fabric after the dehydration. Finally, the carpet fabric enters the drying unit 3, where the hot air assembly 32 blows hot air toward the carpet fabric, completing the drying process.

[0040] Reference Figure 1 The conveying mechanism 1 comprises a frame 11, a transmission shaft 12, and a reduction motor 13. The frame 11 is located on opposite sides of the preheating chamber 21 and the drying chamber 31. The transmission shaft 12 is arranged along the conveying direction of the carpet fabric and is used to convey the carpet fabric after being coated with glue. The transmission shaft 12 is fixed to the frame 11 at both ends via bearings. The reduction motor 13 is fixed to the side of the frame 11 facing away from the transmission shaft 12. Its output shaft rotates through the frame 11 and is coaxially fixedly connected to the transmission shaft 12.

[0041] Reference Figure 2 and Figure 3 The extrusion assembly 22 in the preheating unit 2 includes an upper extrusion roller 221 and a lower extrusion roller 222. The upper extrusion roller 221 and the lower extrusion roller 222 are arranged opposite to each other on both sides of the conveying direction, and the gap between the upper extrusion roller 221 and the lower extrusion roller 222 is adjustable. The lower extrusion roller 222 is rotatably connected to the inner wall of the preheating box 21 through a bearing. A slider 2211 is sleeved on the end of the upper extrusion roller 221. A vertically arranged slide groove 211 is opened on the inner wall of the preheating box 21 corresponding to the slider 2211. The slider 2211 is located in the slide groove 211 and slides with the slide groove 211. A screw rod 2111 is vertically rotatably provided in a chute 211 on one side, and a slider 2211 in the chute 211 is sleeved on the screw rod 2111 through a threaded rotation. A driven bevel gear 2112 is fixedly sleeved on the screw rod 2111. A driving bevel gear 212 is rotatably provided on the inner wall of the preheating box 21 and is rotatably engaged with the driven bevel gear 2112. The rotating shaft of the driving bevel gear 212 rotatably penetrates the inner wall of the preheating box 21 and extends out of the preheating box 21. A servo motor 2121 is fixedly provided on the outer wall of the preheating box 21 and is coaxially fixedly connected to the rotating shaft of the driving bevel gear 212.

[0042] Reference Figure 1 and Figure 2, adjust the gap between the upper pressing roller 221 and the lower pressing roller 222 according to the technical parameters of the carpet fabric and the glue coating layer, so that the carpet fabric passes through between the upper pressing roller 221 and the lower pressing roller 222. And in order to ensure the dry environment inside the preheating box 21, the inner bottom wall of the preheating box 21 is inclined towards a corner of its own bottom, and a drain pipe 213 is fixedly arranged on the outer side wall of the preheating box 21, and the drain pipe 213 communicates with the lowest part of the inner bottom wall of the preheating box 21.

[0043] Refer to Figure 1 and Figure 3 , the heat exchanger 231 is installed on the exhaust gas discharge pipe 33. The heat exchanger 231 is a commercially available product, including a heat exchanger housing 2311 and heat exchange coils 2312. The exhaust gas discharge pipe 33 is connected in series with the heat exchange coils 2312. The high-temperature exhaust gas passes through the tube side, and the inlet and outlet of the heat exchanger housing 2311 are connected to fresh air. The fresh air passes through the shell side. The exhaust fan 232 is connected to the intake end of the air supply pipe 4 and the outlet of the heat exchanger housing 2311.

[0044] Refer to Figure 1 and Figure 5 , three opening and closing plates 7 are arranged along the axial direction of the shunt pipe 5. A shunt chamber is formed between two adjacent opening and closing plates 7. The upper shunt chamber communicates with the transition box 24 close to one side of the drying box 31 through a shunt air pipe 6, and the lower shunt chamber communicates with the transition box 24 close to one side of the preheating box 21 through a shunt air pipe 6.

[0045] Refer to Figure 5 and Figure 6 , each opening and closing plate 7 includes a fixed half plate 71 and an adjusting half plate 72 arranged coaxially. The fixed half plate 71 is coaxially fixed on the inner wall of the shunt pipe 5. A groove 721 is recessed along the outer circumference of the adjusting half plate 72. A toothed ring section 722 is fixedly arranged in the groove 721. An adjusting gear 7221 that rotates and meshes with the toothed ring section 722 is rotatably arranged on the inner wall of the shunt pipe 5. The rotating shaft of the adjusting gear 7221 passes through the shunt pipe 5 and is connected with a driving member 73. The driving member 73 includes a driving gear 731 and a brake motor 732. The driving gears 731 correspond to the adjusting gears 7221 one by one and are fixedly sleeved on the ends of the adjusting gears 7221 that rotate and pass through the shunt pipe 5. The adjacent driving gears 731 are meshed with each other, and the radii of the driving gears 731 distributed vertically increase successively from top to bottom. The brake motor 732 is fixedly arranged on the top of the preheating box 21, and its output shaft is coaxially and fixedly connected with the driving gear 731 with the largest radius of the bottom gear.

[0046] Refer to Figure 5 and Figure 6The brake motor 732 drives the bottom driving gear 731 coaxially connected thereto to rotate. Due to the meshing arrangement between adjacent driving gears 731, all driving gears 731 are driven to rotate synchronously. The rotation of the driving gear 731 further drives the adjusting gear 7221 to rotate. The adjusting gear 7221 meshes with the gear ring segment 722 on the outer ring of the adjusting half plate 72, so that the adjusting half plate 72 rotates axially relative to the fixed half plate 71, thereby adjusting the opening of the opening and closing plate 7. Since the radius of the driving gear 731 increases from top to bottom, the air volume distribution in the transition box 24 closer to the preheating unit 2 gradually decreases, forming an effect of increasing heat along the conveying direction.

[0047] Reference Figure 2 A distribution plate 8 is fixed to the inner top wall of the preheating box 21 via a suspension rod. This plate 8 has a hollow interior, its top connected to the air supply duct 4, and a number of air outlet holes 81 at its bottom for evenly distributing hot air to the carpet fabric. A distribution plate 8 is installed identically on the inner top walls of both the transition box 24 and the drying box 31. The distribution plate 8 in the transition box 24 is connected to the air supply branch duct 6.

[0048] Reference Figure 2 The hot air assembly 32 in the drying box 31 includes a heating element 321 and a blower 322. The heating element 321 can adopt an electric heating wire or an infrared heating tube to adapt to different heating requirements. The heating element 321 in this embodiment adopts an infrared heating tube. Several infrared heating tubes are installed and arranged in the distribution plate 8. The blower 322 is fixedly set on the top of the drying box 31, and its air outlet is connected to the inner cavity of the distribution plate 8 through an air duct.

[0049] Reference Figure 1 and Figure 7 In order to reduce waste gas pollution during the drying process, a waste gas treatment box 9 filled with treatment liquid is provided on one side of the drying box body 31. The waste gas treatment box 9 is filled with treatment liquid, and the outlet end of the waste gas discharge pipe 33 passes through the waste gas treatment box 9 and is inserted into the treatment liquid. An outlet 91 is provided on the top of the waste gas treatment box 9, and an activated carbon purification plate 911 is installed at the outlet 91.

[0050] Reference Figure 1 and Figure 2 A temperature sensor 311 is installed on the inner side of the drying box 31 near the end, and a central control screen 312 is fixedly installed on the outer wall of the drying box 31. All electrical control components on the device such as the heating element 321 and the temperature sensor 311 are electrically connected to the central control screen 312.

[0051] Reference Figures 1 to 7 A carpet glue drying process comprises the following steps: S1. Pre - coating and pre - heating stage: The carpet fabric is traction - conveyed by the conveying mechanism 1 into the pre - heating unit 2. Through the relative rotation of the upper squeezing roller 221 and the lower squeezing roller 222 in the pre - heating box 21, water is squeezed out of the carpet fabric. The heat exchanger 231 recovers the waste heat in the drying unit 3, and the exhaust fan 232 conveys the air heated by the heat exchanger 231 to the cloth - flow plate 8 in the pre - heating box 21 and the transition box 24. The hot air is evenly blown out through the air outlet holes 81 at the bottom of the cloth - flow plate 8 to pre - heat the carpet fabric gradually.

[0052] S2. Pre - coating and drying stage: The carpet fabric is traction - conveyed by the conveying mechanism 1 out of the transition box 24 and then into the drying box 31. The blower 322 introduces and conveys external air into the cloth - flow plate 8, and the heating element 321 heats the air in the cloth - flow plate 8 to form hot air, which is evenly blown onto the surface of the carpet fabric through the air outlet holes 81 at the bottom of the cloth - flow plate 8. After drying, the semi - finished carpet is output from the drying box 31.

[0053] S3. Re - bottom pre - heating stage: The carpet semi - finished product after re - bottom gluing is placed with the glue surface facing up and is traction - conveyed into the pre - heating unit 2 again by the conveying mechanism 1. The carpet semi - finished product after re - bottom gluing enters the pre - heating unit 2 through the conveying mechanism 1, and the operations of squeezing out water and pre - heating in the pre - coating and pre - heating stage are repeated.

[0054] S4. Re - bottom drying stage: The carpet semi - finished product after re - bottom gluing is traction - conveyed by the conveying mechanism 1 out of the pre - heating unit 2. The pre - heated carpet semi - finished product enters the drying unit 3, and the hot - air assembly 32 continues to blow hot air onto the carpet fabric to complete the re - bottom drying process.

[0055] The implementation principle of a drying device for carpet gluing and its technological process in the embodiment of the present application is as follows: The glued carpet fabric is sent into the pre - heating unit 2 through the conveying mechanism 1. The squeezing assembly 22 performs water treatment on the carpet fabric to remove excess water. Then, through the coordinated action of the heat exchanger 231 and the exhaust fan 232 in the heating assembly 23, the heat energy recovered in the drying unit 3 is converted into hot air to pre - heat the carpet fabric after squeezing out water. Finally, the carpet fabric enters the drying unit 3, and the hot - air assembly 32 blows hot air onto the carpet fabric to complete the drying process. In the whole technological process, the heat energy is recycled, significantly reducing energy consumption, while improving the drying efficiency and quality stability, thus effectively enhancing the overall performance of carpet production.

[0056] The above are all the preferred embodiments of the present application. The protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A drying device for carpet gluing, characterized in that , including a conveying mechanism (1) for conveying the blanket fabric after applying glue. A preheating unit (2) and a drying unit (3) are provided on the conveying mechanism (1). The drying unit (3) is located downstream of the preheating unit (2). The drying unit (3) includes a drying box body (31), a hot air assembly (32) arranged in the drying box body (31), and an exhaust gas discharge pipe (33) connected to the drying box body (31). The hot air assembly (32) is used to blow and dry the blanket fabric. The preheating unit (2) includes a preheating box body (21), a squeezing assembly (22) located in the preheating box body (21) for squeezing and removing water from the blanket fabric, and a heating assembly (23) for heating the blanket fabric after squeezing and removing water. The heating assembly (23) includes a heat exchanger (231) and a suction fan (232). A air supply pipe (4) is connected between the exhaust gas discharge pipe (33) and the preheating box body (21). The heat exchanger (231) is connected between the air supply pipe (4) and the exhaust gas discharge pipe (33). The suction fan (232) is arranged on the air supply pipe (4) and is used to convey the air heated by the heat exchanger (231) into the preheating box body (21).

2. The drying device for carpet gluing according to claim 1, characterized in that , The squeezing assembly (22) includes a rotatably arranged upper squeezing roller (221) and a lower squeezing roller (222). The upper squeezing roller (221) and the lower squeezing roller (222) are arranged oppositely, and the gap between the upper squeezing roller (221) and the lower squeezing roller (222) is adjustable. The blanket fabric passes through between the upper squeezing roller (221) and the lower squeezing roller (222). The inner bottom wall of the preheating box body (21) is inclined towards a corner of its own bottom. A drain pipe (213) is arranged on the outer side wall of the preheating box body (21), and the drain pipe (213) communicates with the lowest part of the inner bottom wall of the preheating box body (21).

3. The drying device for carpet gluing according to claim 2, characterized in that , A cloth flow plate (8) is arranged on the inner top wall of the preheating box body (21). The inside of the cloth flow plate (8) is a cavity structure. Its top is communicated with the air supply pipe (4), and a plurality of air outlet holes (81) are arranged at the bottom to uniformly blow hot air onto the blanket fabric.

4. A drying device for carpet gluing according to claim 3, characterized in that , One cloth flow plate (8) is arranged on the inner top wall of the drying box body (31). The air outlet holes (81) at its bottom are arranged towards the blanket fabric. The hot air assembly (32) includes a heating element (321) and a blower (322). The heating element (321) is arranged in the cloth flow plate (8), and the blower (322) is arranged on the top of the drying box body (31) and communicates the outside of the drying box body (31) with the inner cavity of the cloth flow plate (8).

5. The drying device for carpet gluing according to claim 3, characterized in that , The preheating unit (2) further includes a plurality of transition boxes (24) connected between the preheating box body (21) and the drying box body (31). A cloth flow plate (8) is provided on the inner top wall of each transition box (24). A shunt pipe (5) is connected between the air supply pipe (4) and the preheating box body (21). A plurality of opening and closing plates (7) are arranged along the axial direction of the shunt pipe (5). A shunt chamber is formed between adjacent two opening and closing plates (7). Each shunt chamber is connected to the cloth flow plate (8) in the corresponding transition box (24) through an air supply branch pipe (6), and the opening and closing angle of each opening and closing plate (7) is adjustable.

6. The drying device for carpet gluing according to claim 5, characterized in that , Each opening and closing plate (7) includes a fixed half plate (71) and an adjusting half plate (72) arranged coaxially. The fixed half plate (71) is coaxially fixed on the inner wall of the shunt pipe (5). A toothed ring section (722) is sleeved on the outer ring of the adjusting half plate (72). An adjusting gear (7221) that rotates and meshes with the toothed ring section (722) is rotatably arranged on the inner wall of the shunt pipe (5). The rotating shaft of the adjusting gear (7221) passes through the shunt pipe (5) and is connected with a driving member (73). When the driving member (73) drives the adjusting gear (7221) to rotate, the rotation of the adjusting gear (7221) drives the toothed ring section (722) to rotate around its own axis to adjust the opening degree of the opening and closing plate (7).

7. A drying device for carpet gluing according to claim 6, characterized in that , The driving member (73) includes a driving gear (731) and a brake motor (732). The driving gears (731) correspond to the adjusting gears (7221) one by one and are sleeved on the ends of the adjusting gears (7221) that rotate and pass through the shunt pipe (5). Adjacent two driving gears (731) are meshed with each other, and the radii of the driving gears (731) distributed vertically increase successively from top to bottom. The brake motor (732) is coaxially connected to one of the driving gears (731).

8. A drying device for carpet gluing according to claim 1, characterized in that , One side of the drying box body (31) is provided with an exhaust gas treatment box (9) filled with treatment liquid. The outlet end of the exhaust gas discharge pipe (33) penetrates through the exhaust gas treatment box (9) and is inserted into the treatment liquid. An air outlet (91) is opened at the top of the exhaust gas treatment box (9), and an activated carbon purification plate (911) is arranged at the air outlet (91).

9. A drying process flow for carpet gluing, applied to a drying device for carpet gluing according to any one of the above claims 1-8, characterized in that , including the following steps: S1. Precoating and preheating stage: The carpet surface fabric is traction-transported into the preheating unit (2) by the conveying mechanism (1), and the carpet surface fabric is extruded to remove water and preheated by the extrusion assembly (22) and the heating assembly (23); S2. Precoating and drying stage: The carpet surface fabric is traction-transported away from the preheating unit (2) by the conveying mechanism (1), and then enters the drying unit (3) for drying. After drying, the carpet semi-finished product is output from the drying unit (3); S3. Bottom-recoating and preheating stage: The glued surface of the carpet semi-finished product after bottom-recoating is facing up, and it is traction-transported into the preheating unit (2) again by the conveying mechanism (1), and the carpet surface fabric is extruded to remove water and preheated by the extrusion assembly (22) and the heating assembly (23); S4. Double-bottom drying stage: The semi-finished carpet after double-bottom gluing is pulled away from the preheating unit (2) by the conveying mechanism (1), and then enters the drying unit (3) again for drying. After drying, the finished carpet is output from the drying unit (3) to complete the double-bottom process.

10. The drying process flow of carpet gluing according to claim 9, characterized in that , In the pre-coating drying stage and the double-bottom drying stage, the heat energy in the drying unit (3) is recovered through the heat exchanger (231) and the exhaust fan (232), and is transported to the preheating unit (2) for heating.

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